米6体育平台手机版

ZHCSPU5G December 1982 – October 2022 SN54HCT74 , SN74HCT74

PRODUCTION DATA

请参考 PDF 数据表获取器件具体的封装图。

5.5 Timing Requirements

overrecommended operating free-air temperature range (unless otherwise noted)

			V_CC	T_A = 25°C		SN54HCT74⁽¹⁾		SN74HCT74		UNIT
			V_CC	MIN	MAX	MIN	MAX	MIN	MAX	UNIT
f_clock	Clock frequency		4.5 V		27		18		22	MHz
f_clock	Clock frequency		5.5 V		30		20		24	MHz
t_w	Pulse duration	PRE or CLR low	4.5 V	16		24		20		ns
		PRE or CLR low	5.5 V	14		21		18
		CLK high or low	4.5 V	18		27		23
		CLK high or low	5.5 V	16		24		21
t_su	Setup time before CLK↑	Data	4.5 V	12		18		15		ns
		Data	5.5 V	11		16		14
		PRE or CLR inactive	4.5 V	0		0		0
		PRE or CLR inactive	5.5 V	0		0		0
t_h	Hold time, data after CLK↑		4.5 V	0		0		0		ns
t_h	Hold time, data after CLK↑		5.5 V	0		0		0		ns

(1) SN54HCT74 is in product preview.