74HC190 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

生产厂家

74HC190

Presettable synchronous BCD decade up/down counter

Philips Electronics 

Philips Semiconductors

Presettable synchronous BCD decade

up/down counter

Product specification

74HC/HCT190

Sequence

Load (present) to BCD seven;

count up to eight, nine, zero,

one and two;

inhibit;

count down to one, zero, nine,

eight and seven.

Fig.8 Typical load, count and inhibit sequence.

December 1990

Fig.9 Logic diagram.

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