These 18-bit flip-flops feature 3-state outputs designed
specifically for driving highly-capacitive or relatively
low-impedance loads. They are particularly suitable for implementing
wider buffer registers, I/O ports, parity bus interfacing, and
The 'ACT16823 can be used as two 9-bit flip-flops or one 18-bit
flip-flop. With the clock-enable () input low, the D-type flip-flops enter data on the
low-to-high transitions of the clock. Taking high disables the clock buffer,
thus latching the outputs. Taking the clear () input low causes the Q outputs to
go low independently of the clock.
A buffered output-enable () input can be used to place the outputs in either a
normal logic state (high or low logic levels) or a high-impedance
state. In the high-impedance state, the outputs neither load nor
drive the bus lines significantly.
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
The 74ACT16823 is packaged in theTI shrink small-outline package,
which provides twice the I/O pin count and functionality of standard
small-outline packages in the same printed-circuit-board area.
The 54ACT16823 is characterized for operation over the full
military temperature range of 55°C to 125°C. The 74ACT16823
is characterized for operation from -40°C to 85°C
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