74HCHCT377 Datasheet, PDF (4/7 Pages) NXP Semiconductors – Octal D-type flip-flop with data enable; positive-edge trigger

Philips Semiconductors
Octal D-type flip-flop with data enable;
positive-edge trigger
Product specification
74HC/HCT377
FUNCTION TABLE
OPERATING
MODES
load “1”
load “0”
hold (do nothing)
INPUTS
CP E D_n
↑
l
h
↑
l
l
↑hX
XHX
OUTPUTS
Q_n
H
L
no change
no change
Notes
1. H = HIGH voltage level
h = HIGH voltage level one set-up time
prior to the LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time
prior to the LOW-to-HIGH CP transition
↑ = LOW-to-HIGH CP transition
X = don’t care
Fig.4 Functional diagram.
December 1990
Fig.5 Logic diagram.
4