74HC574DB 查看數據表（PDF） - NXP Semiconductors.

零件编号

产品描述 (功能)

比赛名单

74HC574DB

Octal D-type flip-flop; positive edge-trigger; 3-state

NXP Semiconductors. 

Philips Semiconductors

Octal D-type flip-flop; positive edge-trigger;

3-state

Product specification

74HC/HCT574

FUNCTION TABLE

OPERATING

MODES

load and read

register

load register and

disable outputs

INPUTS

OE CP Dn

L↑ l

L↑ h

H↑ l

H↑ h

INTERNAL

FLIP-FLOPS

L

H

L

H

OUTPUTS

Q0 to Q7

L

H

Z

Z

Notes

1. H = HIGH voltage level

h = HIGH voltage level one set-up time prior to the LOW-to-HIGH

CP transition

L = LOW voltage level

l = LOW voltage level on set-up time prior to the LOW-to-HIGH

CP transition

Z = HIGH impedance OFF-state

↑ = LOW-to-HIGH clock transition

Fig.4 Functional diagram.

December 1990

Fig.5 Logic diagram.

4

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