M74HC192TTR 데이터 시트보기 (PDF) - STMicroelectronics

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M74HC192TTR

SYNCHRONOUS UP/DOWN DECADE COUNTER

STMicroelectronics 

M74HC192

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 NAME AND FUNCTION

QA to QD

COUNT

DOWN

Flip-Flop Outputs

Count Down Clock Input

COUNT UP Count Up Clock Input

LOAD

CARRY

BORROW

CLEAR

A to D

GND

Vcc

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

FUNCTION

COUNT UP

NO COUNT

COUNT DOWN

NO COUNT

PRESET

RESET

2/14

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