Philips Semiconductors
Product specification
8-bit shift register with input flip-flops
74HC/HCT597
AC WAVEFORMS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL
PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
SHCP to Q
23
28
33
30
7
40
49
57
52
15
50
61
71
65
19
60
74
86
78
22
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.5 Fig.7
4.5 Fig.8
4.5 Fig.7
4.5 Fig.9
4.5 Fig.9
4.5 Fig.7
4.5 Fig.7
4.5 Fig.8
4.5 Fig.9
4.5 Fig.10
4.5 Fig.11
4.5 Fig.11
4.5 Fig.12
4.5 Fig.11
4.5 Fig.11
tPHL
propagation delay
MR to Q
t
PHL/ tPLH propagation delay
STCP to Q
tPHL/ tPLH propagation delay
PL to Q
t
THL/ tTLH output transition time
tW
tW
tW
tW
trem
tsu
tsu
tsu
th
SHCP pulse width
HIGH or LOW
16
16
25
20
12
12
12
12
5
7
20
20
31
25
15
15
15
15
5
24
24
38
30
18
18
18
18
5
STCP pulse width
HIGH or LOW
6
MR pulse width
LOW
14
10
−2
5
PL pulse width
LOW
removal time
MR to SHCP
set-up time
Dn to STCP
set-up time
DS to SHCP
2
set-up time
PL to SHCP
4
hold time
−1
−2
75
Dn to STCP
th
hold time
5
5
5
PL, DS to SHCP
fmax
maximum pulse frequency 30
SHCP
24
20
MHz 4.5 Fig.7
December 1990
10
NXP [ NXP ]
