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SDLS144D April 1985 – October 2016 SN54LS240 , SN54LS241 , SN54LS244 , SN54S240 , SN54S241 , SN54S244 , SN74LS240 , SN74LS241 , SN74LS244 , SN74S240 , SN74S241 , SN74S244

封裝選項

機械數據 (封裝 | 引腳)

DW|20
- MPDS173B
N|20
- MPDI002C

散熱焊盤機械數據 (封裝 | 引腳)

訂購信息

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾

		MIN	MAX	UNIT
Supply voltage, V_CC⁽²⁾			7	V
Input voltage, V_I	SNx4LS24x		7	V
Input voltage, V_I	SNx4S24x		5.5	V
Off-state output voltage			5.5	V
Storage temperature, T_stg		–65	150	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) Voltage values are with respect to network ground terminal.

6.2 ESD Ratings

			VALUE	UNIT
ALL PACKAGES
V_(ESD)	Electrostatic discharge	Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	500	V
N PACKAGE
V_(ESD)	Electrostatic discharge	Charged device model (CDM), per JEDEC specification JESD22-C101⁽²⁾	500	V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

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

			MIN	NOM	MAX	UNIT
V_CC	Supply voltage⁽¹⁾	SN54xS24x	4.5	5	5.5	V
V_CC	Supply voltage⁽¹⁾	SN74xS24x	4.75	5	5.25	V
V_IH	High-level input voltage		2			V
V_IL	Low-level input voltage	SN54LS24x			0.7	V
V_IL	Low-level input voltage	SN54S24x, SN74xS24x			0.8	V
I_OH	High-level output current	SN54xS24x			–12	mA
I_OH	High-level output current	SN74xS24x			–15	mA
I_OL	Low-level output current	SN54LS24x			12	mA
		SN54S24x			48
		SN74LS24x			24
		SN74S24x			64
	External resistance between any input and V_CC or ground (SNx4S24x only)				40	kΩ
T_A	Operating free-air temperature⁽²⁾	SN54xS24x	–55		125	°C
T_A	Operating free-air temperature⁽²⁾	SN74xS24x	0		70	°C

(1) Voltage values are with respect to network ground terminal.

(2) An SN54S241J operating at free-air temperature above 116°C requires a heat sink that provides a thermal resistance from case to free air, R_θCA, of not more that 40°C/W.

6.4 Thermal Information

THERMAL METRIC⁽¹⁾		SN74LS240, SN74LS244	SN74LS24x, SN74S24x		SN74LS24x	UNIT
		DB (SSOP)	DW (SOIC)	N (PDIP)	NS (SOP)
		20 PINS	20 PINS	20 PINS	20 PINS
R_θJA	Junction-to-ambient thermal resistance⁽²⁾⁽³⁾	94.3	90.3	50.6	76.6	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	55.9	45.5	37.4	42.9	°C/W
R_θJB	Junction-to-board thermal resistance	49.5	48.1	31.5	44.1	°C/W
ψ_JT	Junction-to-top characterization parameter	21.3	19.4	24	19.2	°C/W
ψ_JB	Junction-to-board characterization parameter	49.1	47.6	31.4	43.7	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

(2) Voltage values are with respect to network ground terminal.

(3) The package thermal impedance is calculated in accordance with JESD 51-7.

6.5 Electrical Characteristics – SNx4LS24x

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER	TEST CONDITIONS⁽¹⁾			MIN	TYP⁽²⁾	MAX	UNIT
V_IK	V_CC = MIN, I_I = –18 mA					–1.5	V
Hysteresis (V_T+ − V_T−)	V_CC = MIN			0.2	0.4		V
V_OH	V_CC = MIN, I_OH = –3 mA, V_IH = 2 V, V_IL = MAX			2.4	3.4		V
V_OH	V_CC = MIN, I_OH = MAX, V_IH= 2 V, V_IL = 0.5 V			2			V
V_OL	V_CC = MIN, V_IL = MAX, V_IH= 2 V		I_OL = 12 mA, SN54LS24x			0.4	V
V_OL	V_CC = MIN, V_IL = MAX, V_IH= 2 V		I_OL = 24 mA, SN74LS24x			0.5	V
I_OZH	V_CC = MAX, V_IL = MAX, V_IH= 2 V, V_O = 2.7 V					20	µA
I_OZL	V_CC = MAX, V_IL = MAX, V_IH= 2 V, V_O = 0.4 V					–20	µA
I_I	V_CC = MAX, V_I= 7 V					0.1	mA
I_IH	V_CC = MAX, V_I= 2.7 V					20	µA
I_IL	V_CC = MAX, V_IL= 0.4 V					–0.2	mA
I_OS⁽³⁾	V_CC = MAX			–40		–225	mA
I_CC	V_CC = MAX, output open	Outputs high	All		17	27	mA
		Outputs low	SNx4LS240		26	44
		Outputs low	SNx4LS241, SNx4LS244		27	46
		Outputs disabled	SNx4LS240		29	50
		Outputs disabled	SNx4LS241, SNx4LS244		32	54

(1) For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions.

(2) All typical values are at V_CC = 5 V and T_A = 25°C.

(3) Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second.

6.6 Electrical Characteristics – SNx4S24x

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER	TEST CONDITIONS⁽¹⁾			MIN	TYP⁽²⁾	MAX	UNIT
V_IK	V_CC = MIN, I_I = –18 mA					–1.2	V
Hysteresis (V_T+ − V_T−)	V_CC = MIN			0.2	0.4		V
V_OH	V_CC = MIN, I_OH = –1 mA, V_IH = 2 V, V_IL = 0.8 V, SN74S24x only			2.7			V
	V_CC = MIN, I_OH = –3 mA, V_IH = 2 V, V_IL = 0.8 V			2.4	3.4
	V_CC = MIN, I_OH = MAX, V_IH= 2 V, V_IL = 0.5 V			2
V_OL	V_CC = MIN, V_IL = MAX, V_IH= 2 V, I_OL = 0.8 V					0.55	V
I_OZH	V_CC = MAX, V_IL = 0.8 V, V_IH= 2 V, V_O = 2.4 V					50	µA
I_OZL	V_CC = MAX, V_IL = MAX, V_IH= 2 V, V_O = 0.5 V					–50	µA
I_I	V_CC = MAX, V_I= 5.5 V					1	mA
I_IH	V_CC = MAX, V_I= 2.7 V					50	µA
I_IL	V_CC = MAX, V_IL= 0.5 V		Any A			–400	µA
I_IL	V_CC = MAX, V_IL= 0.5 V		Any G			–2	mA
I_OS⁽³⁾	V_CC = MAX			–50		–225	mA
I_CC	V_CC = MAX, output open	Outputs high	SN54S240		80	123	mA
			SN74S240		80	135
			SN54S241, SN54S244		95	147
			SN74S241, SN74S244		95	160
		Outputs low	SN54S240		100	145
			SN74S240		100	150
			SN54S241, SN54S244		120	170
			SN74S241, SN74S244		120	180
		Outputs disabled	SN54S240		100	145
			SN74S240		100	150
			SN54S241, SN54S244		120	170
			SN74S241, SN74S244		120	180

(1) For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions.

(2) All typical values are at V_CC = 5 V, T_A = 25°C.

(3) Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second.

6.7 Switching Characteristics – SNx4LS24x

V_CC = 5 V, T_A = 25°C (see SN54LS24x and SN74LS24x Devices)

PARAMETER	TEST CONDITIONS		TYP	MAX	UNIT
t_PLH	R_L = 667 Ω, C_L = 45 pF	SNx4LS240	9	14	ns
t_PLH	R_L = 667 Ω, C_L = 45 pF	SNx4LS241, SNx4LS244	12	18	ns
t_PHL	R_L = 667 Ω, C_L = 45 pF		12	18	ns
t_PZL	R_L = 667 Ω, C_L = 45 pF		20	30	ns
t_PZH	R_L = 667 Ω, C_L = 45 pF		15	23	ns
t_PLZ	R_L = 667 Ω, C_L = 5 pF		10	20	ns
t_PHZ	R_L = 667 Ω, C_L = 5 pF		15	25	ns

6.8 Switching Characteristics – SNx4S24x

V_CC = 5 V and T_A = 25°C (see SN54S24x and SN74S24x Devices)

PARAMETER	TEST CONDITIONS		TYP	MAX	UNIT
t_PLH	R_L = 90 Ω, C_L = 50 pF	SNx4S240	4.5	7	ns
t_PLH	R_L = 90 Ω, C_L = 50 pF	SNx4S241, SNx4S244	6	9	ns
t_PHL	R_L = 90 Ω, C_L = 50 pF	SNx4S240	4.5	7	ns
t_PHL	R_L = 90 Ω, C_L = 50 pF	SNx4S241, SNx4S244	6	9	ns
t_PZL	R_L = 90 Ω, C_L = 50 pF		10	15	ns
t_PZH	R_L = 90 Ω, C_L = 50 pF	SNx4S240	6.5	10	ns
t_PZH	R_L = 90 Ω, C_L = 50 pF	SNx4S241, SNx4S244	8	12	ns
t_PLZ	R_L = 90 Ω, C_L = 5 pF		10	15	ns
t_PHZ	R_L = 90 Ω, C_L = 5 pF		6	9	ns

6.9 Typical Characteristics

V_CC = 5 V, T_A = 25°C, C_L = 45 pF, and R_L = 667 Ω (unless otherwise noted)

SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 D001_sdls146.gif

Figure 1. Simulated Propagation Delay From Input to Output