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        Semiconductor parts containing 521 
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Microsemi Corp. 
| Part | Description |  
| JANTXV1N5521UR | LEADLESS PACKAGE FOR SURFACE MOUNT ZENER DIODE, 500mW |  
| LX5211 | 9-LINE LOW CAPACITANCE, ??POWER SCSI TERMINATOR |  
| LX5211CDP | SCSI - Single Ended |  
| LX5211CPWP | SCSI - Single Ended |  
| LX5212 | 9-LINE LOW CAPACITANCE, ??POWER SCSI TERMINATOR |  
| LX5212CDP | SCSI - Single Ended |  
| LX5212CN | SCSI - Single Ended |  
| LX5212CPWP | SCSI - Single Ended |  
| LX5213 | 9-LINE LOW CAPACITANCE, ??POWER SCSI TERMINATOR |  
| LX5213CDP | SCSI - Single Ended |  
| LX5213CN | SCSI - Single Ended |  
| LX5213CPWP | SCSI - Single Ended |  
| LX5218 | 9-CHANNEL PLUG AND PLAY SCS I TERMINATOR |  
| LX5218CDW | SCSI - Single Ended |  
| LX5218CPW | SCSI - Single Ended |  
| LX5219 | ULTRA 9 - CHANNEL SCSI TERMINATOR |  
| LX5219CDW | SCSI - Single Ended |  
| LX5219CPW | SCSI - Single Ended |  
| MLL5521B | Zener Voltage Regulator Diode |  
| MM3Z5521 | LOW VOLTAGE AVALANCHE DIODE |  
| MZ5210 | 100V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5211 | 110V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5212 | 120V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5213 | 130V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5214 | 140V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5215 | 150V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5216 | 160V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5217 | 170V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5218 | 180V, 5.0Wt General purpose voltage reference/regulator diode |  
| MZ5219 | 190V, 5.0Wt General purpose voltage reference/regulator diode |  
| PIC7521 | Power Integrated Circuit |  
| UZ5210 | POWER ZENERS |  
| UZ5211 | POWER ZENERS |  
| UZ5212 | 120V, 5.0Wt General purpose voltage reference/regulator diode |  
| UZ5213 | POWER ZENERS |  
| UZ5214 | POWER ZENERS |  
| UZ5215 | POWER ZENERS |  
| UZ5216 | POWER ZENERS |  
| UZ5217 | POWER ZENERS |  
| UZ5218 | POWER ZENERS |  
| UZ5219 | POWER ZENERS |  
  
M.S. Kennedy Corporation (MSK) 
| Part | Description |  
| MSK5210HTU | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210HZD | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210HZS | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210HZU | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210TD | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210TS | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210TU | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210ZD | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210ZS | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5210ZU | Dual positive/negative, 3 AMP, ultra low dropout fixed voltage regulator |  
| MSK5211 |  DUAL +/- VOLTAGE REGULATOR |  
| MSK5215-12 | 12V, High current, low dropout surface mount voltage regulator |  
| MSK5215-12H | 12V, High current, low dropout surface mount voltage regulator |  
| MSK5215-1.5E |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-1.7 |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-1.7E | HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-1.7H |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-1.9 |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-1.9E |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-2.5 | 2.5V, High current, low dropout surface mount voltage regulator |  
| MSK5215-2.5E |  HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-3.3 | 3.3V, High current, low dropout surface mount voltage regulator |  
| MSK5215-3.3E | HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-3.3H | 3.3V, High current, low dropout surface mount voltage regulator |  
| MSK5215-5.0 | HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-5.0H | HIGH CURRENT, LOW DROPOUT SURFACE MOUNT VOLTAGE REGULATORS |  
| MSK5215-5 | 5V, High current, low dropout surface mount voltage regulator |  
| MSK5215-5H | 5V, High current, low dropout surface mount voltage regulator |  
| MSK521XEG |  DUAL +/- VOLTAGE REGULATOR |  
| MSK521XG | DUAL +/- VOLTAGE REGULATOR |  
| MSK521XHG |  DUAL +/- VOLTAGE REGULATOR |  
  
MURAT 
 
NEC Electronics Inc. 
| Part | Description |  
| 2SC1521 | NPN Triple Diffued Silicon Transistor |  
| NDL5521P1 | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . Without connector, flat mount flange. |  
| NDL5521P1C | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With FC-PC connector, flat mount flange. |  
| NDL5521P1D | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With SC-PC connector, flat mount flange. |  
| NDL5521P2 | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . Without connector, vertical flange. |  
| NDL5521P2C | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With FC-PC connector, vertical flange. |  
| NDL5521P2D | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With SC-PC connector, vertical flange. |  
| NDL5521P | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . Without connector, no flange. |  
| NDL5521PC | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With FC-PC connector, no flange. |  
| NDL5521PD | 2.5 Gb/s optical fiber communications 50 um InGaAs avalanche photo diode modul with MMF . With SC-PC connector, no flange. |  
| NE52118 | L-S band 4-pin super mini mold GaAsHBT |  
| NE52118-T1 | L to S band low noise amplifier NPN GaAs HBT. |  
| NE52118-T1 | L-S band 4-pin super mini mold GaAsHBT |  
| NX8560SJ521-BC | EA modulator and wavelength monitor integrated 1550 nm MQW-DFB laser diode module for 10 Gb/s applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. FC-UPC connector. |  
| NX8560SJ521-CC | EA modulator and wavelength monitor integrated 1550 nm MQW-DFB laser diode module for 10 Gb/s applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-UPC connector. |  
| NX8567SA521-BC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 600 km DWDM applications. ITU-T wavelength 1552.122nm. Frequency 193.15 THz. FC-UPC connector. |  
| NX8567SA521-CC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 600 km DWDM applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-UPC connector. |  
| NX8567SAM521-BC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 360 km DWDM applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. FC-UPC connector. |  
| NX8567SAM521-CC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 360 km DWDM applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-UPC connector. |  
| NX8567SAS521-BC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 240 km DWDM applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. FC-UPC connector. |  
| NX8567SAS521-CC | EA modulator and wavelength monitor integrated InGaAsP MQW DFB laser diode module for 2.5 Gb/s ultralong-reach 240 km DWDM applications. ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-UPC connector. |  
| NX8570SC521-BA | CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (20 mW min). ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. FC-PC connector. |  
| NX8570SC521-CA | CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (20 mW min). ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-PC connector. |  
| NX8570SC521D-BA | 4 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (20 mW min). FC-PC connector. |  
| NX8570SC521D-CA | 4 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (20 mW min). SC-PC connector. |  
| NX8570SC521Q-BA | 8 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (20 mW min). FC-PC connector. |  
| NX8571SC521-BA | CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (10 mW min). ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. FC-PC connector. |  
| NX8571SC521-CA | CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (10 mW min). ITU-T wavelength 1552.122 nm. Frequency 193.15 THz. SC-PC connector. |  
| NX8571SC521D-BA | 4 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (10 mW min). FC-PC connector. |  
| NX8571SC521D-CA | 4 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (10 mW min). SC-PC connector. |  
| NX8571SC521Q-BA | 8 x 50 GHz tunable CW InGaAsP MQW-DFB laser diode module with wavelength monitor for DWDM applications (10 mW min).FC-PC connector. |  
| PS2521-1 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521-1 | High current input transistor output photocoupler |  
| PS2521-2 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521-2 | High current input transistor output photocoupler |  
| PS2521-4 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521-4 | High current input transistor output photocoupler |  
| PS2521 | High current input transistor output photocoupler |  
| PS2521L-1 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521L-1 | High current input transistor output photocoupler |  
| PS2521L-1-E3 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-1-E4 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-1-F3 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-1-F4 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-2 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521L-2 | High current input transistor output photocoupler |  
| PS2521L-2-E3 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-2-E4 | LARGE FORWARD INPUT TYPE HIGH ISOLATION VOLTAGE MULTI PHOTOCOUPLER SIRIES |  
| PS2521L-4 | High isolation voltage large forward AC input type multi photocoupler. |  
| PS2521L-4 | High current input transistor output photocoupler |  
| PS2521L | High current input transistor output photocoupler |  
| UPD75212A | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75212ACW | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75212ACW-XXX | 8-bit microcomputer incorporating programmable FIP C/D |  
| UPD75212AGF | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75212AGF-XXX3BE | Microcontroller |  
| UPD75212AGF-XXX-3BE | 8-bit microcomputer incorporating programmable FIP C/D |  
| UPD75216 | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75216A | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75216ACW | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75216ACW-XXX | 4-bit single-chip microcomputer |  
| UPD75216AGF | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75216AGF-XXX3BE | Microcontroller |  
| UPD75216AGF-XXX-3BE | 4-bit single-chip microcomputer |  
| UPD75217CW | -0.3 to +7.0V; V(in): -0.3 to +0.3V; 15mA; 600mW; microchip |  
| UPD75217GF | -0.3 to +7.0V; V(in): -0.3 to +0.3V; 15mA; 600mW; microchip |  
| UPD75218 | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75218CW | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75218CW-XXX | 4-bit microcomputer 75X series with on-chip FIP control |  
| UPD75218GF | 4-BIT SINGLE-CHIP MICROCOMPUTER |  
| UPD75218GF-XXX-3BE | 4-bit microcomputer 75X series with on-chip FIP control |  
  
NELFC 
| Part | Description |  
| HA1521 | 5 V,+/-50 ppm, TTL crystal clock oscillator |  
| HAA1521 | 3.3 V,+/-50 ppm, TTL crystal clock oscillator |  
| HS1521 | 5 V, +/-50 ppm, TTL crystal clock oscillator |  
| HSA1521 | 3.3 V, +/-50 ppm, TTL crystal clock oscillator |  
| HS-A1521-FREQ |  TTL |  
| NTC5210-12.8MHZ | Intergated Circuit, Semiconductor or Electronic Component description not yet available. View Datasheet. |  
| NTC5210-20MHZ | Intergated Circuit, Semiconductor or Electronic Component description not yet available. View Datasheet. |  
| SA1521 | 5 V,+/-50 ppm, TTL crystal clock oscillator |  
| SAA1521 | 3.3 V,+/-50 ppm, TTL crystal clock oscillator |  
| SJ1521 | 5 V, +/-50 ppm, TTL  crystal clock oscillator |  
| SJA1521 | 3.3 V, +/-50 ppm, TTL  crystal clock oscillator |  
| SJ-A1521-FREQ | CRYSTAL CLOCK OSCILLATORS |  
| SM1521 | 5 V, +/-50 ppm, TTL crystal clock oscillator |  
| SMA1521 | 3.3 V, +/-50 ppm, TTL crystal clock oscillator |  
| SM-A1521-FREQ |  TTL |  
  
NEWEN 
| Part | Description |  
| 2N5218 | 220V Vcbo, 10A Ic Low frequency power silicon NPN transistor |  
  
NICHA 
 
New Japan Radio Co., Ltd. 
 
National Semiconductor 
| Part | Description |  
| 2N5219 | Transistors, Bipolar, Si NPN Low-Power |  
| 54AC521 | 8-Bit Identity Comparator |  
| 54AC521DMQB | Digital Comparator |  
| 54AC521FMQB | Digital Comparator |  
| 54AC521LMQB | Digital Comparator |  
| 54ACT521 | 8-Bit Identity Comparator |  
| 54ACT521DMQB | Digital Comparator |  
| 54ACT521FMQB | Digital Comparator |  
| 54ACT521LMQB | Digital Comparator |  
| 54ACT521MDA | 8-Bit Identity Comparator |  
| 54F521 | 8-Bit Identity Comparator |  
| 54F521DC | 8-Bit Identity Comparator |  
| 54F521DM | 8-Bit Identity Comparator |  
| 54F521DMQB | 8-Bit Identity Comparator |  
| 54F521FM | Digital Comparator |  
| 54F521FMQB | Digital Comparator |  
| 54F521LM | Digital Comparator |  
| 54F521LMQB | 8-Bit Identity Comparator |  
| 54FCT521 | 8-Bit Identity Comparator |  
| 54FCT521DMQB | Digital Comparator |  
| 54FCT521FMQB | Digital Comparator |  
| 54FCT521LMQB | Digital Comparator |  
| 5962-8752101VA | 16-Key Encoder |  
| 5962-9752101MPA | Single Supply, Low-Power, High Output, Current Feedback Amplifier |  
| 74ACT521PCQR | Digital Comparator |  
| 74F521DC | Digital Comparator |  
| 74F521MSA | 8-Bit Identity Comparator |  
| 74F521PC | 8-Bit Identity Comparator |  
| 74F521PCQR | Digital Comparator |  
| 74F521QC | Digital Comparator |  
| 74F521SC | 8-Bit Identity Comparator |  
| 74F521SJ | 8-Bit Identity Comparator |  
| 74FCT521APC | Digital Comparator |  
| 74FCT521ASC | Digital Comparator |  
| 74FCT521ASCX | Digital Comparator |  
| AD7521JD | 10-Bit, 12-Bit Binary Multiplying D/A Converter |  
| AD7521JN | 10-Bit, 12-Bit Binary Multiplying D/A Converter |  
| AD7521LD | 10-Bit, 12-Bit Binary Multiplying D/A Converter |  
| AD7521LN | 10-Bit, 12-Bit Binary Multiplying D/A Converter |  
| AD7521SD/883 | Digital-to-Analog Converter |  
| AD7521SD/883B | Digital-to-Analog Converter |  
| AD7521SD/883C | Digital-to-Analog Converter |  
| AD7521TD/883 | Digital-to-Analog Converter |  
| AD7521TD/883B | Digital-to-Analog Converter |  
| AD7521TD/883C | Digital-to-Analog Converter |  
| AD7521UD/883 | Digital-to-Analog Converter |  
| AD7521UD/883B | Digital-to-Analog Converter |  
| AD7521UD/883C | Digital-to-Analog Converter |  
| CRCW08052101F |  Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization |  
| DAC7521JD | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521JN | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521KN | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521LD | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521LN | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521SD | 17 V,  12-bit binary multiplying D/A converter |  
| DAC7521UD | 17 V,  12-bit binary multiplying D/A converter |  
| DM54ALS521J | Digital Comparator |  
| DM74ALS521J | Digital Comparator |  
| DM74ALS521WM/A+ | Digital Comparator |  
| DM74ALS521WM/B+ | Digital Comparator |  
| DP8521A | DP8520A/DP8521A/DP8522A microCMOS Programmable 256k/1M/4M Video RAM Controller/Drivers |  
| DP8521AV20 | Memory Controller |  
| DP8521AV25 | Memory Controller |  
| DP8521V | Memory Controller |  
| IMP16A/521D | Micro Peripheral: Miscellaneous |  
| IMP-16A/521D | +5v,-12V, 16-bit standard instruction SET, MOS/LSI control and read only memory unit (CROM) |  
| IMP-4A/521D | +5v,-12V, 4-bit standard instruction SET, MOS/LSI control and read only memory unit (CROM) |  
| LM95213 |  2-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface and TCRIT Outputs |  
| LM95213CISD | 2-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface and TCRIT Outputs |  
| LM95213CISDX |  2-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface and TCRIT Outputs |  
| LMS5213 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7-2.8 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7-3.0 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7-3.3 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7X-2.8 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7X-3.0 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5213IM7X-3.3 | 80mA, uCap, Low Dropout Voltage Regulator in SC70 |  
| LMS5214 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-2.5 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-2.6 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-2.8 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-2.9 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-3.0 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMG-3.3 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-2.5 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-2.6 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-2.8 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-2.9 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-3.0 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LMS5214IMGX-3.3 | 80mA, Low Dropout Voltage Regulator with Auto Discharge Function in SC70 |  
| LP5521TMX | Programmable Three Channel LED Driver |  
| LP5521YQ |  Programmable Three Channel LED Driver |  
| LP5521YQX |  Programmable Three Channel LED Driver |  
| LPV521 |  Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier |  
| LPV521MG |  Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier |  
| LPV521MGE |  Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier |  
| MM52116D | Read Only Memory |  
| MM52116FDW-D | Standard Table ROM |  
| MM52116FDW-N | Standard Table ROM |  
| MM52116FDX-D | Standard Table ROM |  
| MM52116FDX-N | Standard Table ROM |  
| MM52116N | Read Only Memory |  
| MM52132J | Read Only Memory |  
| MM52132N | Read Only Memory |  
| MM5213J | Read Only Memory |  
| MM5213N | Read Only Memory |  
| MM5214J | Read Only Memory |  
| MM5214N | Read Only Memory |  
| MM52164D | Read Only Memory |  
| MM52164N | Read Only Memory |  
| MM54HC521J | Digital Comparator |  
| MM54HC521J/883 | Digital Comparator |  
| MM54HC521J/883B | Digital Comparator |  
| MM54HC521J/883C | Digital Comparator |  
| MM54HCT521J | 8-Channel TRI-STATE-R Multiplexer |  
| MM74HC521J | Digital Comparator |  
| MM74HC521J/A+ | Digital Comparator |  
| MM74HC521N/A+ | Digital Comparator |  
| MM74HC521N/B+ | Digital Comparator |  
| MM74HC521WM | Digital Comparator |  
| MM74HCT521N | Digital Comparator |  
| MM74HCT521WM | Digital Comparator |  
| MM74HCT521WM/A+ | Digital Comparator |  
| MMBT6521 | Transistors, Bipolar, Si NPN Low-Power |  
  
NTE 
| Part | Description |  
| NTE2521 | Silicon NPN transistor. Video output for HDTV. |  
| NTE4521B | Intergated Circuit, Semiconductor or Electronic Component description not yet available. View Datasheet. |  
| NTE5210A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 51V. Zener test current Izt = 50mA. |  
| NTE5210AK | 51.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5211A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 52V. Zener test current Izt = 50mA. |  
| NTE5211AK | 52.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5212A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 56V. Zener test current Izt = 45mA. |  
| NTE5212AK | 56.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5213A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 60V. Zener test current Izt = 43mA. |  
| NTE5213AK | 60.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5214A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 62V. Zener test current Izt = 40mA. |  
| NTE5214AK | 62.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5215A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 68V. Zener test current Izt = 37mA. |  
| NTE5215AK | 68.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5216A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 75V. Zener test current Izt = 33mA. |  
| NTE5216AK | 75.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5217A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 82V. Zener test current Izt = 30mA. |  
| NTE5217AK | 82.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5218A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 87V. Zener test current Izt = 29mA. |  
| NTE5218AK | 87.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5219A | Zener diode, 10 watt, +-5% tolerance. Nominal zener voltage Vz = 91V. Zener test current Izt = 28mA. |  
| NTE5219AK | 91.0V, 10Wt General purpose voltage reference/regulator diode |  
| NTE5521 | Silicon controlled rectifier (SCR), 25A. Repetitive peak forward and reverse voltage Vdrm,Vrrm = 50V. RMS forard current It(rms) = 25A. |  
  
Oki Semiconductor 
 
OMNI 
| Part | Description |  
| COM5216T | 200V high efficiency, center-tap rectifier |  
| COM5217T | 300V high efficiency, center-tap rectifier |  
| OM5210SC | 15Amp high efficiency rectifier |  
| OM5211SC | 15Amp high efficiency rectifier |  
| OM5212SC | 15Amp high efficiency rectifier |  
| OM5213SC | 15Amp high efficiency rectifier |  
| OM5216DT | 16Amp high efficiency, center-tap rectifier |  
| OM5216RC | 30Amp high efficiency, center-tap rectifier |  
| OM5216RT | 16Amp high efficiency, center-tap rectifier |  
| OM5216ST | 16Amp high efficiency, center-tap rectifier |  
| OM5217DT | 16Amp high efficiency, center-tap rectifier |  
| OM5217RT | 16Amp high efficiency, center-tap rectifier |  
| OM5217ST | 16Amp high efficiency, center-tap rectifier |  
| OM5218DC | 30Amp high efficiency, center-tap rectifier |  
| OM5218RC | 30Amp high efficiency, center-tap rectifier |  
| OM5218SC | 30Amp high efficiency, center-tap rectifier |  
| OM5219DC | 30Amp high efficiency, center-tap rectifier |  
| OM5219RC | 30Amp high efficiency, center-tap rectifier |  
| OM5219SC | 30Amp high efficiency, center-tap rectifier |  
  
OMRON 
| Part | Description |  
| VB-5211 |  Multiple Limit Switch |  
  
ON Semiconductor 
| Part | Description |  
| 2N5210RLRA | Amplifier Transistor NPN |  
| AMIS30521C5212RG | Micro-Stepping Motor Driver |  
| CAT521LI-T2 | Configured Digitally Programmable Potentiometer (DPP???): Programmable Voltage Applications |  
| CAT521WI-T2 |  Configured Digitally Programmable Potentiometer (DPP???): Programmable Voltage Applications |  
| CS5211 | Low Voltage Synchronous Buck Controller |  
| CS5211ED14 | V(cc): -0.3 to +16V; low voltage synchronous buck controller |  
| CS5211ED14G | Low Voltage Synchronous Buck Controller |  
| CS5211EDR14 | V(cc): -0.3 to +16V; low voltage synchronous buck controller |  
| CS5211EDR14G |  Low Voltage Synchronous Buck Controller |  
| CS5211GD14 | V(cc): -0.3 to +16V; low voltage synchronous buck controller |  
| CS5211GDR14 | V(cc): -0.3 to +16V; low voltage synchronous buck controller |  
| CS5211GDR14G |  Low Voltage Synchronous Buck Controller |  
| CS5212_06 |  Low Voltage Synchronous Buck Controller |  
| CS5212 | Low Voltage Synchronous Buck Controller |  
| CS5212D | Low Voltage Synchronous Buck Controller |  
| CS5212ED14 | V(cc): -0.5 to +7V; low voltage synchronous buck controller |  
| CS5212ED14G | Low Voltage Synchronous Buck Controller |  
| CS5212EDR14 | V(cc): -0.5 to +7V; low voltage synchronous buck controller |  
| CS5212EDR14G |  Low Voltage Synchronous Buck Controller |  
| CS5212GD14 | V(cc): -0.5 to +7V; low voltage synchronous buck controller |  
| CS5212GD14G |  Low Voltage Synchronous Buck Controller |  
| CS5212GDR14 | V(cc): -0.5 to +7V; low voltage synchronous buck controller |  
| CS5212GDR14G | Low Voltage Synchronous Buck Controller |  
| MC14521 | 24-Stage Frequency Divider |  
| MC14521B_06 |  24−Stage Frequency Divider |  
| MC14521B | 24-Stage Frequency Divider |  
| MC14521BCP | 24-Stage Frequency Divider |  
| MC14521BCPG | 24-Stage Frequency Divider |  
| MC14521BD | 24-Stage Frequency Divider |  
| MC14521BDG | 24-Stage Frequency Divider |  
| MC14521BDR2 | 24-Stage Frequency Divider |  
| MC14521BDR2G | 24-Stage Frequency Divider |  
| MC14521BF | 24-Stage Frequency Divider |  
| MC14521BFEL | 24-Stage Frequency Divider |  
| MC14521BFELG | 24-Stage Frequency Divider |  
| MC14521BFG | 24-Stage Frequency Divider |  
| MC14521BFL1 | 24-Stage Frequency Divider |  
| MC14521BFR2 | 24-Stage Frequency Divider |  
| MJE521 | Plastic Medium-Power NPN Silicon Transistor |  
| MJE521G | Bipolar Power C77 NPN 4A 40V |  
| MMBT6521LT1 | Small Signal Amplifier NPN |  
| MMBT6521LT1G | Small Signal Amplifier NPN |  
| MPS6521 | Amplifier Transistor NPN |  
| MPS6521G | Small Signal Amplifier NPN |  
| MPS6521RLRA | Amplifier Transistor NPN |  
| MPS6521RLRAG | Small Signal Amplifier NPN |  
| MUN5211 | Dual Bias Resistor Transistors |  
| MUN5211DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5211DW1T1G_09 | Dual Bias Resistor Transistors |  
| MUN5211DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5211T1_06 | Bias Resistor Transistor |  
| MUN5211T1 | Bias Resistor Transistor NPN |  
| MUN5211T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| MUN5212 | Dual Bias Resistor Transistors |  
| MUN5212DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5212DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5212T1 | Bias Resistor Transistor NPN |  
| MUN5212T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| MUN5213 | Dual Bias Resistor Transistors |  
| MUN5213DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5213DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5213T1 | Bias Resistor Transistor NPN |  
| MUN5213T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| MUN5214 | Dual Bias Resistor Transistors |  
| MUN5214DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5214DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5214T1 | Bias Resistor Transistor NPN |  
| MUN5214T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| MUN5215 | Dual Bias Resistor Transistors |  
| MUN5215DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5215DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5215DW1T2 | Dual Bias Resistor Transistor NPN |  
| MUN5215DW | Dual Bias Resistor Transistors |  
| MUN5215T1 | Bias Resistor Transistor NPN |  
| MUN5215T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| MUN5216 | Dual Bias Resistor Transistors |  
| MUN5216DW1T1 | Dual Bias Resistor Transistor NPN |  
| MUN5216DW1T1G | Small Signal Bias Resistor Transistor SC88, (SOT363) Dual NPN 50V |  
| MUN5216DW1T2 | Dual Bias Resistor Transistor NPN |  
| MUN5216T1 | Bias Resistor Transistor NPN |  
| MUN5216T1G | NPN SILICON BIAS RESISTOR TRANSISTORS |  
| NCP1521 |  AC-DC Offline Switching Controllers/Regulators |  
| NCP1521AMUTBG | 1.5 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage Step−Down Converter |  
| NCP1521ASNT1G | DCDC step down converter |  
| NCP1521B |  1.5 MHz, 600 mA Step−Down DC−DC Converter |  
| NCP3521DMR2G | LDO Regulator Controller |  
| NCP5210 | 3-in-1 PWM Dual Buck and Linear DDR Power Controller |  
| NCP5210MNR2 | 3-in1 DDR Memory Controller |  
| NCP5210MNR2G | 3-in1 DDR Memory Controller |  
| NCP5211A |  Low Voltage Synchronous Buck Controller |  
| NCP5211AD |  Low Voltage Synchronous Buck Controller |  
| NCP5211ADR2 |  Low Voltage Synchronous Buck Controller |  
| NCP5211BDR2G | SYNC BUCK CONTROLLER |  
| NCP5211DR2G | SYNC BUCK CONTROLLER |  
| NCP5212A_09 | Single Synchronous Step-Down Controller |  
| NCP5212A | Single Synchronous Step-Down Controller |  
| NCP5212AMNTXG | Single Synchronous Step-Down Controller |  
| NCP5212T |  Single Synchronous Step-Down Controller |  
| NCP5212TMNTXG |  Single Synchronous Step-Down Controller |  
| NCP5214 | 2-in-1 Notebook DDR Power Controller |  
| NCP5214A | 2−in−1 Notebook DDR Power Controller |  
| NCP5214AMNR2G | 2-IN-1 NOTEBOOK DDR POWER CNTLR |  
| NCP5214MNR2 | 2-in-1 Notebook DDR Power Controller |  
| NCP5214MNR2G | 2-IN-1 NOTEBOOK DDR POWER CNTLR |  
| NCP5215 | Dual Synchronous Buck Controller for Notebook Power System |  
| NCP5215MNR2G | Dual Synchronous Buck Controller for Notebook Power System |  
| NCP5218MNR2G |  2−in−1 Notebook DDR Power Controller |  
| NCV70521 |  Micro-Stepping Motor Driver |  
| NCV70521MN003G |  Micro-Stepping Motor Driver |  
| NE521D | High-Speed, Dual-Differential, Comparator/Sense Amp |  
| NE521DG | HI-SPEED DUAL-DIFFERENTIA |  
| NE521DR2 | High-Speed, Dual-Differential, Comparator/Sense Amp |  
| NE521DR2G | HI-SPEED DUAL-DIFFERENTIA |  
| NE521N | High-Speed, Dual-Differential, Comparator/Sense Amp |  
| NE521NG | HI-SPEED DUAL-DIFFERENTIA |  
| NLAS5213AMUTAG | 1??? RON DPST and Dual SPST Switches |  
| NLAS5213AUSG | 1??? RON DPST and Dual SPST Switches |  
| NLAS5213BUSG | 1??? RON DPST and Dual SPST Switches |  
| RB521S30T1_05 |  Schottky Barrier Diode |  
| RB521S30T1 | Schottky Barrier Diode |  
| RB521S30T1/D | Schottky Barrier Diode |  
| RB521S30T1G | Small Signal SOD523 Schottky, Single |  
| RB521S30T5 | Schottky Barrier Diode |  
  
OPTEK 
| Part | Description |  
| K5210 | Phototransistor |  
| K5211 | Phototransistor |  
| OAC5521 | 4.3V General purpose voltage reference/regulator diode |  
| OAC5521A | 4.3V General purpose voltage reference/regulator diode |  
| OAC5521B | 4.3V General purpose voltage reference/regulator diode |  
| OAC5521C | 4.3V General purpose voltage reference/regulator diode |  
| OPF521 | 5 MBd Fiber optic receiver |  
  
OPWAY 
| Part | Description |  
| TRS-52120-CXX0G | CWDM 5V / 622 Mbps RoHS Compliant Optical Single-Mode Transceiver |  
| TRS-52160-CXX0G | CWDM 5V / 622 Mbps RoHS Compliant Optical Single-Mode Transceiver |  
  
Panasonic (Matsushita) 
| Part | Description |  
| 2SC5216 | Silicon NPN epitaxial planer type small signal transistor |  
| 2SC5521 |  Horizontal Deflection Transistor Series for TV |  
| AN5210 | TV/Video Circuits |  
| AN5215 | V(cc): 14.4V; I(cc): 36mA; 520mW; TV sound-IF amplifier, FM decoder IC |  
| AN5216 |  TV Sound IF Amplifier Detector AF Output Circuits |  
| AN5521 | TV vertical deflection output |  
| AN7521 | BTL Audio Power IC |  
| UN5210 | Silicon NPN epitaxial planer transistor |  
| UN5211 | Silicon NPN epitaxial planer transistor |  
| UN5212 | Silicon NPN epitaxial planer transistor |  
| UN5213 | Silicon NPN epitaxial planer transistor |  
| UN5214 | Silicon NPN epitaxial planer transistor |  
| UN5215 | Silicon NPN epitaxial planer transistor |  
| UN5216 | Silicon NPN epitaxial planer transistor |  
| UN5217 | Silicon NPN epitaxial planer transistor |  
| UN5218 | Silicon NPN epitaxial planer transistor |  
| UN5219 | Silicon NPN epitaxial planer transistor |  
| UN521D | Silicon NPN epitaxial planer transistor |  
| UN521E | Silicon NPN epitaxial planer transistor |  
| UN521F | Silicon NPN epitaxial planer transistor |  
| UN521K | Silicon NPN epitaxial planer transistor |  
| UN521L | Silicon NPN epitaxial planer transistor |  
| UN521M | Silicon NPN epitaxial planer transistor |  
| UN521N | Silicon NPN epitaxial planer transistor |  
| UN521T | Silicon NPN epitaxial planer transistor |  
| UN521V | Silicon NPN epitaxial planer transistor |  
| UN521Z | Silicon NPN epitaxial planer transistor |  
| UNR5210 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5211 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5212 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5213 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5214 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5215 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5216 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5217 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5218 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR5219 | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521D | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521E | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521F | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521K | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521L | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521M | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521N | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521T | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521V | Silicon NPN epitaxial planer transistor with biult-in resistor |  
| UNR521W |  Silicon NPN epitaxial planar type |  
| UNR521Z | Silicon NPN epitaxial planer transistor with biult-in resistor |  
  
PARA 
| Part | Description |  
| A-521E | Common anode hi.effi red single digit display |  
| A-521G | Common anode green single digit display |  
| A-521H | Common anode  red single digit display |  
| A-521SR | Common anode super red single digit display |  
| A-521Y | Common anode yellow single digit display |  
| C-521E | Common cathode hi.effi red single digit display |  
| C-521G | Common cathode green single digit display |  
| C-521H | Common cathode  red single digit display |  
| C-521SR | Common cathode super red single digit display |  
| C-521Y | Common cathode yellow single digit display |  
  
PED 
 
PERF 
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