74HC/HCT4516 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

74HC/HCT4516

Binary up/down counter

Philips Electronics 

Philips Semiconductors

Binary up/down counter

Fig.4 Functional diagram.

Product specification

74HC/HCT4516

FUNCTION TABLE

MR PL UP/DN CE CP

MODE

L

HX

L

L

X

L

L

L

L

L

H

H

X

X

X X parallel load

H X no change

L ↑ count down

L ↑ count up

X X reset

Notes

1. H = HIGH voltage level

L = LOW voltage level

X = don’t care

↑ = LOW-to-HIGH clock transition

December 1990

Fig.5 Timing diagram.

4

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