74HC166 Philips, 74HC166 Datasheet - Page 4

• Manufacturer Part Number: 74HC166
• Description: 8-bit parallel-in/serial-out shift register
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
parallel load
serial shift
hold “do nothing”
OPERATING MODES
8-bit parallel-in/serial-out shift register
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
q = lower case letters indicate the state of the referenced output one set-up time prior to the
X = don’t care
= LOW-to-HIGH CP transition
LOW-to-HIGH CP transition
I
I
h
h
X
PE
I
I
I
I
h
CE
X
CP
INPUTS
Fig.4 Functional diagram.
X
X
I
h
X
D
S
4
h - h
X - X
X - X
X - X
I - I
D
0
-D
7
L
H
L
H
q
0
Q
0
Q
n
REGISTER
H - H
q
q
q
L - L
0
0
1
- q
- q
- q
Q
5
5
6
1
-Q
6
74HC/HCT166
Product specification
OUTPUT
Q
q
q
q
H
L
6
6
7
7