2

Functional Diagram

MODE SELECT - TRUTH TABLE

OPERATING MODE

INPUTS

OUTPUTS

MR

CP

DS1

DS2

Q0

Q1 - Q7

RESET (CLEAR)

L

X

X

X

L

L - L

SHIFT

H

↑

l

l

L

q0 - q6

H

↑

l

h

L

q0 - q6

H

↑

h

l

L

q0 - q6

H

↑

h

h

H

q0 - q6

H = HIGH voltage level steady state.

L = LOW voltage level steady state.

h = HIGH voltage level one setup time prior to the LOW-to_HIGH clock transition.

l = LOW voltage level one setup time prior to the LOW-to-HIGH clock transition.

X = Don’t care.

q = Lowercase letters indicate the state of the referenced output prior to the LOW-to-HIGH clock transition.

↑ = LOW-to-HIGH clock transition.

3

4

5

6

11

13

12

10

1

DS1

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

CP

MR

98

2

DS2

GND = 7

CD54/74AC164, CD54/74ACT164