© Semiconductor Components Industries, LLC, 2006

July, 2006 − Rev. 7

1

Publication Order Number:

SN74LS192/D

SN74LS192

PRESETTABLE BCD/DECADE

UP/DOWN COUNTER

PRESETTABLE 4-BIT

BINARY UP/DOWN

COUNTER

The SN54/74LS192 is an UP/DOWN BCD Decade (8421) Counter

and the SN54/74LS193 is an UP/DOWN MODULO-16 Binary

Counter. Separate Count Up and Count Down Clocks are used and in

either counting mode the circuits operate synchronously. The outputs

change state synchronous with the LOW-to-HIGH transitions on the

clock inputs.

Separate Terminal Count Up and Terminal Count Down outputs are

provided which are used as the clocks for a subsequent stages without

extra logic, thus simplifying multistage counter designs. Individual

preset inputs allow the circuits to be used as programmable counters.

Both the Parallel Load (PL) and the Master Reset (MR) inputs

asynchronously override the clocks.

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as the Dual

In-Line Package.

CONNECTION DIAGRAM DIP (TOP VIEW)

14

13

12

11

10

9

12345

6

7

16

15

8

MR

PL

PIN NAMES

LOADING (Note a)

HIGH

LOW

MR

PL

Count Up Clock Pulse Input

Count Down Clock Pulse Input

Asynchronous Master Reset (Clear) Input

Asynchronous Parallel Load (Active LOW) Input

Parallel Data Inputs

Flip-Flop Outputs (Note b)

Terminal Count Down (Borrow) Output (Note b)

Terminal Count Up (Carry) Output (Note b)

0.5 U.L.

0.5 U.L.

0.5 U.L.

0.5 U.L.

0.5 U.L.

10 U.L.

10 U.L.

10 U.L.

0.25 U.L.

0.25 U.L.

0.25 U.L.

0.25 U.L.

0.25 U.L.

5 (2.5) U.L.

5 (2.5) U.L.

5 (2.5) U.L.

NOTES:

a. 1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.

b. The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)

http://onsemi.com

PRESETTABLE BCD/DECADE

UP/DOWN COUNTER

PRESETTABLE 4-BIT BINARY

UP/DOWN COUNTER

LOW POWER SCHOTTKY

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

16

1

16

1

ORDERING INFORMATION

SN54LSXXXJ

Ceramic

SN74LSXXXN

Plastic

SN74LSXXXD

SOIC

16

1

D SUFFIX

SOIC

CASE 751B-03

LOGIC SYMBOL

GND = PIN 8

5

4

32 6 7

12

9

10

1

15

11

PL

13

MR

14