Datasheet

September 1993 4
Philips Semiconductors Product specification
Octal D-type transparent latch; 3-state 74HC/HCT373
Fig.4 Functional diagram.
Fig.5 Logic diagram (one latch).
FUNCTION TABLE
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
I = LOW voltage level one set-up time prior to the
HIGH-to-LOW LE transition
X = don’t care
Z = high impedance OFF-state
OPERATING
MODES
INPUTS
INTERNAL
LATCHES
OUTPUTS
OE LE D
n
Q
0
to Q
7
enable and
read
register
(transparent
mode)
L
L
H
H
L
H
L
H
L
H
latch and
read register
L
L
L
L
l
h
L
H
L
H
latch register
and disable
outputs
H
H
X
X
X
X
X
X
Z
Z
Fig.6 Logic diagram.