HD74LS193 查看數據表（PDF） - Renesas Electronics

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HD74LS193

Synchronous Up / Down Decade Counter (dual clock lines)

Renesas Electronics 

HD74LS193

Block Diagram

Data

Input A

Down Count

Up Count

Borrow

Output

Carry

Output

QA

Output QA

T

QA

Data

Input B

QB

Output QB

T

QB

Data

Input C

QC

Output QC

T

QC

Data

Input D

Clear

QD

T

QD

Load

Absolute Maximum Ratings

Item

Symbol

Ratings

Supply voltage

VCC

7

Input voltage

VIN

7

Power dissipation

PT

400

Storage temperature

Tstg

–65 to +150

Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.

Output QD

Unit

V

V

mW

°C

Rev.2.00, Feb.18.2005, page 3 of 11

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