74193 IC Binary Up/Down Counter

The 74LS193 is a UP/DOWN DIP-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 synchronously 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 stage 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.

Features:-

Low Power 95 mW Typical Dissipation

High Speed 40 MHz Typical Count Frequency

Synchronous Counting

Asynchronous Master Reset and Parallel Load

Individual Preset Inputs

Cascading Circuitry Internally Provided

Input Clamp Diodes Limit High-Speed Termination Effects

Pin Configuration:

Pin No.

Pin Name

1

P1 ~ B

2

Q1 ~ QB

3

Q0 ~ QA

4

CPD

5

CPU

6

Q2 ~ QC

7

Q3 ~ QD

8

GND

9

P3 ~ D

10

P2 ~ C

11

PL(Active Low)

12

TCU(Active Low)

13

TCD(Active Low)

14

MR

15

P0 ~ A

16

VCC

Pin

Description

CPU

Count up clock pulse input

CPD

Count down clock pulse input

MR

Asynchronous Master Reset(Clear) input

PL

Asynchronous Parallel Load(Active Low) Input

TCU

Terminal count Up(Carry) output

TCD

Terminal count Down(Borrow) output

A,B, C, & D

Preset Inputs(Parallel Data Inputs)

Qn

Flip-Flop Outputs

Specifications:-

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

74

4.75

5

5.25

V

TA

Operating Ambient Temperature Range

74

0

25

70

C

IOH

Output Current High

74

-0.4

mA

IOL

Output Current Low

74

8

mA

SN74LS193 Datasheet