HD74HC668 查看數據表（PDF） - Hitachi -> Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

HD74HC668

Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter

Hitachi -> Renesas Electronics 

HD74HC669

Load

U/D

DA

Enable P

Enable T

DB

DC

DD

VCC

CK

HD74HC668/HD74HC669

TQ

IN Q

TQ

IN Q

TQ

IN Q

TQ

IN Q

QA

QB

QC

QD

RCO

5

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