2

ACS161MS

Functional Diagram

TRUTH TABLE

OPERATING MODE

INPUTS

OUTPUTS

MR

CP

PE

TE

SPE

TC

Reset (Clear)

L

X

X

X

X

X

L

L

Parallel Load

H

X

X

I

I

L

L

H

X

X

I

h

H

(Note 1)

Count

H

h

h

h (Note 3)

X

count

(Note 1)

Inhibit

H

X

I (Note 2)

X

h (Note 3)

X

(Note 1)

H

X

X

I (Note 2)

h (Note 3)

X

L

H = High Steady State, L = Low Steady State, h = High voltage level one setup time prior to the Low-to-High clock transition, I = Low volt-

age level one setup time prior to the Low-to-High clock transition, X = Don’t Care,q = Lower case letters indicate the state of the referenced

output prior to the Low-to-High clock transition,

= Low-to-High Transition.

NOTES:

1. The TC output is High when TE is High and the counter is at Terminal Count (HHHH).

2. The High-to-Low transition of PE or TE should only occur while ZCP is High for conventional operation.

3. The Low-to-High transition of SPE should only occur while CP is High for conventional operation.

4. The TC output is High when TE is High and the counter is at Terminal Count (HHHH).

CD

K

CP

JQ

QN

CD

K

CP

JQ

QN

CD

K

CP

JQ

QN

CD

K

CP

JQ

QN

SPE

CP

P0

MR

P1

P2

P3

PE

TE

Q3

TC

Q2

Q1

Q0

Spec Number

518818