米6体育平台手机版

ZHCSQ38F December 1982 – February 2022 SN54HC251 , SN74HC251

PRODUCTION DATA

请参考 PDF 数据表获取器件具体的封装图。

5.5 Switching Characteristics

over recommended operating free-air temperature range, C_L = 50 pF (unless otherwise noted) (see Figure 6-1)

PARAMETER	FROM (INPUT)	TO (OUTPUT)	V_CC (V)	T_A = 25°C			SN54HC251		SN74HC251		UNIT
PARAMETER	FROM (INPUT)	TO (OUTPUT)	V_CC (V)	MIN	TYP	MAX	MIN	MAX	MIN	MAX	UNIT
t_pd	A, B, or C	W or Y	2		58	205		300		256	ns
			4.5		21	41		60		51
			6		19	35		51		44
	Any D	W or Y	2		44	195		283		244
			4.5		17	39		57		49
			6		15	33		48		41
t_en	OE	W or Y	2		30	145		210		181	ns
			4.5		10	29		42		36
			6		9	25		36		31
t_dis	OE	W or Y	2		25	195		283		244	ns
			4.5		15	39		57		49
			6		14	33		48		41
t_t		W or Y	2		20	75		110		95	ns
			4.5		8	15		22		19
			6		6	13		19		16