SCLS005B - MARCH 1984 - REVISED MAY 1997
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These 8-bit flip-flops feature 3-state outputs designedspecifically for driving highly capacitive or relativelylow-impedance loads. They are particularly suitable for implementingbuffer registers, I/O ports, bidirectional bus drivers, and workingregisters.
The eight flip-flops of the 'HCT374 are edge-triggered D-typeflip-flops. On the positive transition of the clock (CLK) input, theQ outputs are set to the logic levels that were set up at the data(D) inputs.
An output-enable (
) input placesthe eight outputs in either a normal logic state (high or low logiclevels) or the high-impedance state. In the high-impedance state, theoutputs neither load nor drive the bus lines significantly. Thehigh-impedance state and increased drive provide the capability todrive bus lines without interface or pullup components.
does not affect the internaloperations of the flip-flops. Old data can be retained or new datacan be entered while the outputs are in the high-impedance state.
The SN54HCT374 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. TheSN74HCT374 is characterized for operation from -40°C to85°C.
View more information about generic part numbers:SN54HCT374, SN74HCT374
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