74HC597 Philips, 74HC597 Datasheet - Page 4

• Manufacturer Part Number: 74HC597
• Description: 8-bit shift register with input flip-flops
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
ST
no clock edge
X
X
X
8-bit shift register with input flip-flops
CP
L = LOW voltage level
X = don’t care
= LOW-to-HIGH CP transition
Fig.4 Functional diagram.
SH
X
X
X
X
X
CP
PL
X
L
L
L
H
H
MR
X
H
H
L
L
H
FUNCTION
data loaded to input latches
data loaded from inputs to shift register
data transferred from input flip-flops to shift register
invalid logic, state of shift register indeterminate when signals removed
shift register cleared
shift register clocked Q
4
n
= Q
n 1
, Q
0
= D
S
74HC/HCT597
Product specification