HD74AC195 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74AC195

4-bit Parallel-Access Shift Register

Hitachi -> Renesas Electronics 

Timing Diagram

HD74AC195

CP

MR

J

K

PE

D0

D1

D2

D3

Q0

Q1

Q2

Q3

Clear

H

L

H

L

Serial Shift

Load

Serial Shift

Mode Select-Function Table

Inputs

Outputs

Operating Modes

MR CP PE J

K

Dn

Q0

Q1

Q2

Q3

Q3

Asynchronous Reset

L

X

XXXXL

L

L

L

H

Shift, Set First Stage

H

H

H

H

X

H

q0

q1

q2

q2

Shift, Reset First Stage H

H

L

L

X

L

q0

q1

q2

q2

Shift, Toggle First Stage H

H

H

L

X

q0

q0

q1

q2

q2

Shift, Retain First Stage H

H

L

H

X

q0

q0

q1

q2

q2

Parallel Load

H

L

X

X

dn

d0

d1

d2

d3

d3

H : HIGH Voltage Level

L : LOW Voltage Level

X : Immaterial

Lower case letters indicate the state of the referenced input (or output) one setup time prior to the LOW-to-

HIGH transition.

: LOW-to-HIGH clock transition.

3

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