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Partname: | SN74ALS29821DWRE4 |
Description: | 10-bit Bus Interface Flip-Flops With 3-State Outputs |
Manufacturer: | Texas Instruments |
Datasheet: | PDF (246K). Click here to download *) |
These 10-bit edge-triggered D-type flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. These devices are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. On the positive transition of the clock (CLK) input, the Q outputs are true to the data (D) input. A buffered output-enable (OE) input can place the ten outputs in either a normal logic state (high or low logic levels) or a high-impedance state. The outputs also are in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered down. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54ALS29821 is characterized for operation over the full military temperature range of 55C to 125C. The SN74ALS29821 is characterized for operation from 0C to 70C. FUNCTION TABLE |
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Click here to download SN74ALS29821DWRE4 Datasheet*) |
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