Fairchild Semiconductor DM74LS38SJX, DM74LS38SJ, DM74LS38N, DM74LS38MX, DM74LS38M Datasheet

August 1986

Revised March 2000

DM74LS38

Quad 2-Input NAND Buffer with Open-Collector Outputs

General Description

Pull-Up Resistor Equations

This device contains four independent gates, each of which performs the logic NAND function. The open-collector outputs require external pull-up resistors for proper logical operation.

Where:

N1 (IOH) = total maximum output high current for all outputs tied to pull-up resistor

N2 (IIH) = total maximum input high current for all inputs tied to pull-up resistor

N3 (IIL) = total maximum input low current for all inputs tied to pull-up resistor

Ordering Code:

Order Number	Package Number	Package Description
DM74LS38M	M14A	14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS38SJ	M14D	14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS38N	N14A	14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram	Function Table
				Y =	AB
		Inputs					Output
		A		B			Y
		L		L			H
		L		H			H
		H		L			H
		H		H			L

H = HIGH Logic Level

L = LOW Logic Level

Outputs Collector-Open with Buffer NAND Input-2 Quad DM74LS38

© 2000 Fairchild Semiconductor Corporation

DS006363

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DM74LS38

Absolute Maximum Ratings(Note 1)

Supply Voltage	7V
Input Voltage	7V
Output Voltage	7V
Operating Free Air Temperature Range	0°C to +70°C
Storage Temperature Range	−65°C to +150°C

Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

Symbol	Parameter	Min	Nom	Max	Units
VCC	Supply Voltage	4.75	5	5.25	V
VIH	HIGH Level Input Voltage	2			V
VIL	LOW Level Input Voltage			0.8	V
VOH	HIGH Level Output Voltage			5.5	V
IOL	LOW Level Output Current			24	mA
TA	Free Air Operating Temperature	0		70	°C

Electrical Characteristics

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

	Symbol	Parameter	Conditions	Min	Typ	Max	Units
					(Note 2)
	VI	Input Clamp Voltage	VCC = Min, II = −18 mA			−1.5	V
	ICEX	HIGH Level	VCC = Min, VO = 5.5V			250	μA
		Output Current	VIL = Max
	VOL	LOW Level	VCC = Min, IOL = Max		0.35	0.5
		Output Voltage	VIH = Min				V
			IOL = 12 mA, VCC = Min		0.25	0.4
	II	Input Current @ Max Input Voltage	VCC = Max, VI = 7V			0.1	mA
	IIH	HIGH Level Input Current	VCC = Max, VI = 2.7V			20	μA
	IIL	LOW Level Input Current	VCC = Max, VI = 0.4V			−0.36	mA
	ICCH	Supply Current with Outputs HIGH	VCC = Max		0.9	2	mA
	ICCL	Supply Current with Outputs LOW	VCC = Max		6	12	mA

Note 2: All typicals are at VCC = 5V, TA = 25°C.

Switching Characteristics

at VCC = 5V and TA = 25°C

					RL = 667Ω
Symbol	Parameter		CL = 45 pF			CL = 150 pF		Units
		Min		Max		Min	Max
tPLH	Propagation Delay Time			22			48	ns
	LOW-to-HIGH Level Output
tPHL	Propagation Delay Time			22			29	ns
	HIGH-to-LOW Level Output

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