MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 2

10/95

Presettable Counters

High–Performance Silicon–Gate CMOS

The MC54/74HCT161A and HCT163A are identical in pinout to the LS161A

and LS163A. These devices may be used as level converters for interfacing

TTL or NMOS outputs to high speed CMOS inputs.

The HCT161A and HCT163A are programmable 4–bit binary counters with

asynchronous and synchronous reset, respectively.

No. 7A

LOGIC DIAGRAM

Reset

Preset

Data

Inputs

Pin 16 = VCC

Pin 8 = GND

1

P3

6

P2

5

P1

4

P0

3

Clock

2

Q3

11

Q2

12

Q1

13

Q0

14

Reset

1

Load

9

Enable P

7

Enable T

10

BCD or Binary

Outputs

Count

Enables

Ripple

Carry Out

15

FUNCTION TABLE

Inputs

Output

Q

Clock

Reset*

Load

Enable P

Enable T

Output

Q

L

H

H

H

H

X

L

H

H

H

X

X

H

L

X

X

X

H

X

L

Reset

Load Preset Data

Count

No Count

No Count

H = High Level; L = Low Level; X = Don’t Care

* =

HCT163A only. HCT161A is an “Asynchronous–Reset” device.

MC54/74HCT161A

MC54/74HCT163A

Device

Count Mode

Reset Mode

HCT161A

HCT163A

Binary

Binary

Asynchronous

Synchronous

D SUFFIX

SOIC PACKAGE

CASE 751B–05

N SUFFIX

PLASTIC PACKAGE

CASE 648–08

ORDERING INFORMATION

MC54HCXXXAJ

MC74HCXXXAN

MC74HCXXXAD

Ceramic

Plastic

SOIC

1

16

1

16

J SUFFIX

CERAMIC PACKAGE

CASE 620–10

1

16

Pinout: 16–Lead Package (Top View)

15

16

14

13

12

11

10

2

1

3

4

5

6

7

VCC

9

8

RCO*

Q0

Q1

Q2

Q3

Enable

T

Load

Reset Clock

P0

P1

P2

P3 Enable

P

GND

* RCO = Ripple Carry Out