Philips Semiconductors
Product specification
Octal D-type transparent latch; 3-state
FUNCTION TABLE
OPERATING
MODES
enable and read
register
(transparent mode)
latch and read
register
latch register and
disable outputs
Notes
INPUTS
OE
L
L
L
L
H
H
LE
H
H
L
L
L
L
D
N
L
H
l
h
l
h
74HC/HCT573
INTERNAL
LATCHES
L
H
L
H
L
H
OUTPUTS
Q
0
to Q
7
L
H
L
H
Z
Z
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
Fig.4 Functional diagram.
Fig.5 Logic diagram.
December 1990
4