74HC164 查看數據表（PDF） - Diodes Incorporated.

零件编号

产品描述 (功能)

生产厂家

74HC164

8-BIT PARALLEL-OUT SERIAL SHIFT REGISTERS

Diodes Incorporated. 

Pin Descriptions

Pin Number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Pin Name

DSA

DSB

Q0

Q1

Q2

Q3

GND

CP

MR

Q4

Q5

Q6

Q7

VCC

74HC164

400

Function

Serial Data Input

Serial Data Input

Data Output

Data Output

Data Output

Data Output

Ground

Clock Pulse –Positive Edge Triggered

Master Reset - Asynchronous

Data Output

Data Output

Data Output

Data Output

Supply Voltage

Function Table (Note 4)

Mode

MR

Input

CP

DSA

DSB

Output

Q0

Q1-Q7

Reset

L

X

X

X

L

L

H

↑

L

X

L

Qn←Qn-1 (n= 1 to7)

Shift

H

↑

X

L

L

Qn←Qn-1 (n= 1 to7)

H

↑

H

H

H

Qn←Qn-1 (n= 1 to7)

Note:

4. Signals asserted on DSA and DSB must be in place longer than Tsu (set-up time) before CP occurs and remain in place Thold (hold time) after CP.

Logic Diagram

DSA 1

DSB 2

CP 8

MR 9

DQ

DQ

DQ

DQ

DQ

DQ

DQ

DQ

C

C

C

C

C

C

C

C

R

R

R

R

R

R

R

R

3

4

5

6

10

11

12

13

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

74HC164

Document number: DS36279 Rev. 2- 2

2 of 10

www.diodes.com

March 2015

© Diodes Incorporated

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