JAJSO74 データシート

JAJSO74E November 1998 – March 2022 CD54HC243 , CD74HC243 , CD74HCT243

PRODUCTION DATA

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

5.5 Switching Characteristics

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

PARAMETER		V_CC (V)	25°C		-40°C to 85°C	-55°C to 125°C	UNIT
PARAMETER		V_CC (V)	TYP	MAX	MAX	MAX	UNIT
HC TYPES
t_pd	Propagation delay data to outputs	2		90	115	135	ns
		4.5	7⁽¹⁾	18	23	27
		6		15	20	23
t_PZL, t_PZH	Output high-Z, to high level to low level	2		150	190	225	ns
		4.5	12⁽¹⁾	30	38	45
		6		26	33	38
t_PHZ, t_PLZ	Output high level, output low level to high-Z	2		150	190	225	ns
		4.5	12⁽¹⁾	30	38	45
		6		26	33	38
t_t	Output transition times	2		60	75	90	ns
		4.5		12	15	18
		6		10	13	15
C_i	Input capacitance			10	10	10	pF
C_O	Three-state output capacitance			20	20	20	pF
C_pd⁽²⁾⁽³⁾	Power dissipation capacitance	5	80				pF
HCT TYPES
t_pd	Propagation delay data to outputs	4.5	9⁽¹⁾	22	28	33	ns
t_PZH, t_PLZ	Output high-Z to high level to low level	4.5	14⁽¹⁾	34	43	51	ns
t_PHZ, t_PLZ	Output high level, output low level to high-Z	4.5	14⁽¹⁾	35	44	53	ns
t_t	Output transition times	4.5		12	15	18	ns
C_i	Input capacitance			10	10	10	pF
C_O	Three-state output capacitance			20	20	20	pF
C_pd⁽²⁾⁽³⁾	Power dissipation capacitance	5	91				pF

(1) Typical value tested at 5V, C_L = 15pF.

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

(3) P_D = V_CC²f_i (C_PD + C_L) where f_i = Input Frequency, f_O = Output Frequency, C_L = Output Load Capacitance, V_CC = Supply Voltage.