These 8-bit flip-flops feature three-state outputs designedspecifically for driving highly capacitive or relativelylow-impedance loads. They are particularly suitable for implementingmultiuser registers, I/O ports, bidirectional bus drivers, andworking registers.
With the clock enable (
)low, the eight D-type edge-triggered flip-flops enter data on thelow-to- high transitions of the clock. Taking 
input lowcauses the eight Q outputs to go low independently of the clock.
Multiuser buffered output-control inputs (
2, and 3)can be used to place the eight outputs in either a normal logic state(high or low level) or a high-impedance state. The outputs are alsoin the high-impedance state during power-up and power-downconditions. The outputs remain in the high-impedance state while thedevice is powered-down. In the high-impedance state the outputsneither load nor drive the bus lines significantly. Thehigh-impedance state and increased drive provide the capability todrive the bus lines in a bus-organized system without need forinterface or pullup components. The output controls do not affect theinternal operation of the flip-flops. Old data can be retained or newdata can be entered while the outputs are in the high-impedancestate.
The SN54ALS29825 is characterized over the full military range of- 55°C to 125°C. The SN74ALS29825 and SN74ALS29826 arecharacterized for operation from 0°C to 70°C.
View more information about generic part numbers:SN74ALS29825, SN74ALS29826
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