M74HC193 Просмотр технического описания (PDF) - STMicroelectronics

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M74HC193

SYNCHRONOUS UP/DOWN BINARY COUNTER

STMicroelectronics 

M74HC193

INPUT AND OUTPUT EQUIVALENT CIRCUIT

TRUTH TABLE

COUNT UP

H

H

X

X

X : Don’t Care

COUNT DOWN

H

H

X

X

LOAD

H

H

H

H

L

X

PIN DESCRIPTION

PIN No

3, 2, 6, 7

4

5

11

12

13

14

15, 1, 10, 9

8

16

SYMBOL

QA to QD

CPD

CPU

LOAD

CARRY

BORROW

CLEAR

A to D

GND

Vcc

NAME AND FUNCTION

Flip-Flop Outputs

Count Down Clock Input

Count Up Clock Input

Asynchronous Parallel

Load Input (Active LOW)

Count Up (Carry)

Output (Active LOW)

Count Down (Borrow)

Output (Active LOW)

Asynchronous Reset

Input (Active High)

Data Inputs

Ground (0V)

Positive Supply Voltage

CLEAR

L

L

L

L

L

H

FUNCTIO N

COUNT UP

NO COUNT

COUNT DOWN

NO COUNT

PRESET

RESET

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