Datasheet

December 1990 4
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
APPLICATIONS
• Serial data transfer
FUNCTION TABLE
Note
1. H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
q = lower case letters indicate the state of the referenced input one set-up time prior to the
LOW-to-HIGH clock transition
↑ = LOW-to-HIGH clock transition
OPERATING MODES
INPUTS OUTPUTS
MR CP D
sa
D
sb
Q
0
Q
1
− Q
7
reset (clear) L X X X L L − L
shift
H
H
H
H
↑
↑
↑
↑
l
l
h
h
l
h
l
h
L
L
L
H
q
0
− q
6
q
0
− q
6
q
0
− q
6
q
0
− q
6
Fig.4 Functional diagram.
Fig.5 Logic diagram.