74ACT16374 Datasheet, PDF (2/7 Pages) Fairchild Semiconductor – 16-Bit D-Type Flip-Flop with 3-STATE Outputs

Functional Description
The ACT16374 consists of sixteen edge-triggered flip-flops
with individual D-type inputs and 3-STATE true outputs.
The device is byte controlled with each byte functioning
identically, but independent of the other. The control pins
can be shorted together to obtain full 16-bit operation.
Each byte has a buffered clock and buffered Output Enable
common to all flip-flops within that byte. The description
which follows applies to each byte. Each flip-flop will store
the state of their individual D inputs that meet the setup and
hold time requirements on the LOW-to-HIGH Clock (CP_n)
transition. With the Output Enable (OE_n) LOW, the con-
tents of the flip-flops are available at the outputs. When
OE_n is HIGH, the outputs go to the high impedance state.
Operation of the OE_n input does not affect the state of the
flip-flops.
Truth Tables
Inputs
^CP1
OE₁
L

L
L
L
X
H
Inputs
^CP2
OE₂
L

L
L
L
X
H
H = HIGH Voltage Level
L = LOW Voltage Level
X= Immaterial
Z = HIGH Impedance
= LOW-to-HIGH Transition
I₀–I₇
H
L
X
X
I₈–I₁₅
H
L
X
X
Outputs
O₀–O₇
H
L
(Previous)
Z
Outputs
O₈–O₁₅
H
L
(Previous)
Z
Logic Diagrams
Byte 1 (0:7)
Byte 2 (8:15)
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