74HC191 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

生产厂家

74HC191

Presettable synchronous 4-bit binary up/down counter

Philips Electronics 

Philips Semiconductors

Presettable synchronous 4-bit binary

up/down counter

Product specification

74HC/HCT191

Fig.5 N-stage ripple counter using ripple clock.

Fig.6 Synchronous n-stage counter using ripple carry/borrow.

December 1990

Fig.7 Synchronous n-stage counter with parallel gated carry/borrow.

6

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