These 8-bit flip-flops feature 3-state outputs designed
specifically for driving highly capacitive or relatively
low-impedance loads. They are particularly suitable for implementing
buffer registers, I/O ports, bidirectional bus drivers, and working
The eight flip-flops of the ´F374 are edge-triggered D-type
flip-flops. On the positive transition of the clock (CLK) input, the
Q outputs are set to the logic levels that were set up at the data
A buffered output enable () input can be used to place the eight outputs in either
a normal logic state (high or low) or a high-impedance state. In the
high-impedance state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and the increased drive
provide the capability to drive bus lines without need for interface
or pullup components.
The output enable ()
input does not affect internal operations of the flip-flop. Old data
can be retained or new data can be entered while the outputs are in
the high-impedance state.
The SN74F374 is available in TI's shrink small-outline package
(DB), which provides the same I/O pin count and functionality of
standard small-outline packages in less than half the
The SN54F374 is characterized for operation over the full military
temperature range of -55°C to 125°C. The SN74F374 is
characterized for operation from 0°C to 70°C.
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