米6体育平台手机版

ZHCSQV5B November 1998 – July 2022 CD54HC245 , CD54HCT245 , CD74HC245 , CD74HCT245

PRODUCTION DATA

请参考 PDF 数据表获取器件具体的封装图。

5.5 Switching Characteristics

Input t_t= 6ns. Unless otherwise specified, C_L = 50pF⁽²⁾

PARAMETER		V_CC (V)	25°C			-40°C to 85°C		-55°C to 125°C		UNIT
PARAMETER		V_CC (V)	MIN	TYP	MAX	MIN	MAX	MIN	MAX	UNIT
HC TYPES
t_pd	Propagation delay data to output	2			110		140		165	ns
		4.5			22		28		33
		6			19		24		28
t_dis	Output disable to output	2			150		190		225	ns
		4.5			30		38		45
		6			26		33		38
t_en	Output enable to output	2			150		190		225	ns
		4.5			30		38		45
		6			26		33		38
t_t	Output transition time	2			60		75		90	ns
		4.5			12		15		18
		6			10		13		15
C_i	Input capacitance		10		10		10		10	pF
C_io	Three-state output capacitance				20		20		20	pF
C_pd	Power dissipation capacitance	5		53						pF
HCT TYPES
t_pd	Data to output	4.5			26		33		39	ns
t_dis	Output disable to output	4.5			30		38		45	ns
t_en	Output enable to output	4.5			32		40		48	ns
t_t	Output transition time	4.5			12		15		18	ns
C_i	Input capacitance		10		10		10		10	pF
C_io	Three-state output capacitance				20		20		20	pF
C_pd	Power dissipation capacitance⁽¹⁾⁽²⁾	5		55						pF

(1) C_PD is used to determine the dynamic power consumption, per channel.

(2) P_D = V_CC² f_i (C_PD + C_L) where f_i = Input Frequency, C_L = Output Load Capacitance, V_CC = Supply Voltage.