4-71

FAST AND LS TTL DATA

SYNCHRONOUS PRESETTABLE

BCD DECADE COUNTER

The MC74F160A and MC74F162A are high-speed synchronous decade

counters operating in the BCD (8421) sequence. They are synchronously pre-

settable for application in programmable dividers and have two types of Count

Enable inputs plus a Terminal Count output for versatility in forming synchro-

nous multistage counters. The MC74F160A has an asynchronous Master Re-

set input that overrides all other inputs and forces the outputs LOW. The

MC74F162A has a Synchronous Reset input that overrides counting and par-

allel loading and allows the outputs to be simultaneously reset on the rising

edge of the clock.

CONNECTION DIAGRAM

15

16

14

13

12

11

10

2

1

3

4

5

6

7

VCC

9

8

TC

Q0

Q1

Q2

Q3

CET

PE

*R

CP

P0

P1

P2

P3

CEP

GND

*MR for MC74F160A

*SR for MC74F162A

FUNCTION TABLE

SR

PE

CET

CEP

ACTION ON THE RISING CLOCK EDGE (

)

L

X

X

X

Reset (Clear)

H

L

X

X

Load (Pn

Qn)

H

H

H

H

Count (Increment)

H

H

L

X

No Change (Hold)

H

H

X

L

No Change (Hold)

H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care

15

12

STATE DIAGRAM

1

2

3

4

5

6

7

8

9

10

11

13

14

0

MC74F160A

MC74F162A

ORDERING INFORMATION

MC74FXXXAJ

Ceramic

MC74FXXXAN

Plastic

MC74FXXXAD

SOIC

LOGIC SYMBOL

PE P0 P1

P3

P2

CEP

CET

CP

*R

Q0 Q1 Q2 Q3

TC

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

16

1

16

1

16

1

D SUFFIX

SOIC

CASE 751B-03

SYNCHRONOUS PRESETTABLE

BCD DECADE COUNTER

FAST

™ SHOTTKY TTL

VCC = PIN 16

GND = PIN 8

1

15

7

14

13

12

11

9

3

4

5

6

10

2

*MR for MC74F160A

*SR for MC74F162A