CD74HC164 Datasheet, PDF (2/7 Pages) Texas Instruments – High Speed CMOS Logic 8-Bit Serial-In/Parallel-Out Shift Register

Functional Diagram
CD74HC164, CD74HCT164
1
DS1
2
DS2
98
MR
CP
3
Q₀
4
Q₁
5
Q₂
6
Q₃
10
Q₄
11
Q₅
12
Q₆
13
Q₇
GND = 7
V_CC = 14
TRUTH TABLE
INPUTS
OPERATING MODE
RESET (CLEAR)
MR
CP
DS1
DS2
Q₀
L
X
X
X
L
Shift
H
↑
l
l
L
H
↑
l
h
L
H
↑
h
l
L
H
↑
h
h
H
NOTES:
H = High Voltage Level.
h = High Voltage Level One Set-up Time Prior To The Low-to-high Clock Transition.
l = Low Voltage Level One Set-up Time Prior To The Low-to-high Clock Transition.
L = Low Voltage Level.
X = Don’t Care.
↑ = Transition from Low to High Level.
q_n= Lower Case Letters Indicate The State Of the Reference Input Clock Transition.
OUTPUTS
Q₁ - Q₇
L-L
q_{0 -} q₆
q_{0 -} q₆
q_{0 -} q₆
q_{0 -} q₆
2