| SN54LS109AJ | Dual JK negative edge-triggered flip-flop in 16-pin PDIP package. Operational temperature range from -55°C to 125°C. | Datasheet*) |
| SN74LS109AD | Dual JK negative edge-triggered flip-flop in 16-pin SOIC package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| SN74LS109AN | Dual JK negative edge-triggered flip-flop in 16-pin PDIP package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| SN54LS109A | DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP | Datasheet*) |
| SN54LS109J | DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP | Datasheet*) |
| SN74LS109 | DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP | Datasheet*) |
| SN74LS109D | DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP | Datasheet*) |
| SN74LS109N | DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP | Datasheet*) |
There are other manufacturers for this components. For more information please check
SN54LS109 (Texas Instruments)
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