Datasheet

1998 Jun 04 11
Philips Semiconductors Product specification
8-bit serial-in/serial or parallel-out shift
register with output latches; 3-state
74HC/HCT595
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
=50pF.
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITION
+25 −40 to +85 −40 to +125
V
CC
(V)
WAVEFORMS
min typ max min max min max
t
PHL
/ t
PLH
propagation delay
SH
CP
to Q
7
’
− 25 42 − 53 − 63 ns 4.5 Fig.7
t
PHL
/ t
PLH
propagation delay
ST
CP
to Q
n
− 24 40 − 50 − 60 ns 4.5 Fig.8
t
PHL
propagation delay
MR to Q
7
’
− 23 40 − 50 − 60 ns 4.5 Fig.10
t
PZH
/ t
PZL
3-state output enable
time OE to Q
n
− 21 35 − 44 − 53 ns 4.5 Fig.11
t
PHZ
/ t
PLZ
3-state output disable
time OE to Q
n
− 18 30 − 38 − 45 ns 4.5 Fig.11
t
W
shift clock pulse
width HIGH or LOW
16 6 − 20 − 24 − ns 4.5 Fig.7
t
W
storage clock pulse width
HIGH or LOW
16 5 − 20 − 24 − ns 4.5 Fig.8
t
W
master reset
pulse width LOW
20 8 − 25 − 30 − ns 4.5 Fig.10
t
su
set-up time D
S
to
SH
SP
16 5 − 20 − 24 − ns 4.5 Fig.9
t
su
set-up time SH
CP
to ST
CP
16 8 − 20 − 24 − ns 4.5 Fig.8
t
h
hold time D
S
to SH
CP
3 −2 − 3 − 3 − ns 4.5 Fig.9
t
rem
removal time MR
to SH
CP
10 −7 − 13 − 15 − ns 4.5 Fig.10
f
max
maximum clock
pulse frequency
SH
CP
or ST
CP
30 52 − 24 − 20 − MHz 4.5 Figs 7 and 8