74HC573 Datasheet, PDF (4/7 Pages) NXP Semiconductors – Octal D-type transparent latch; 3-state

Philips Semiconductors
Octal D-type transparent latch; 3-state
Product specification
74HC/HCT573
Fig.4 Functional diagram.
FUNCTION TABLE
OPERATING
MODES
enable and read
register
(transparent mode)
latch and read
register
latch register and
disable outputs
INPUTS
OE LE D_N
LH L
LH H
INTERNAL
LATCHES
L
H
OUTPUTS
Q₀ to Q₇
L
H
LL l
L
L
LL h
H
H
HL l
L
Z
HL h
H
Z
Notes
1. H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the HIGH-to-LOW
LE transition
L = LOW voltage level
l = LOW voltage level one set-up time prior to the HIGH-to-LOW
LE transition
Z = high impedance OFF-state
December 1990
Fig.5 Logic diagram.
4