Texas Instruments JM38510-37003BCA, JM38510-37003B2A, SN54AS20J, SN54ALS20AJ, SN74ALS20AD Datasheet

				SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20
					DUAL 4-INPUT POSITIVE-NAND GATES
					SDAS192B ± APRIL 1982 ± REVISED DECEMBER 1994
• Package Options Include Plastic					SN54ALS20A, SN54AS20 . . . J PACKAGE
Small-Outline (D) Packages, Ceramic Chip					SN74ALS20A, SN74AS20 . . . D OR N PACKAGE
Carriers (FK), and Standard Plastic (N) and						(TOP VIEW)
Ceramic (J) 300-mil DIPs						1A	1		14	VCC
description
						1B	2		13	2D
These devices contain two independent 4-input						NC	3		12	2C
						1C	4		11	NC
positive-NAND gates. They perform the Boolean						1D	5		10	2B
functions Y = A •B •C •D or Y = A + B + C + D						1Y	6		9	2A
in positive logic.
					GND		7		8	2Y
The SN54ALS20A and SN54AS20 are
characterized for operation over the full military					SN54ALS20A, SN54AS20 . . . FK PACKAGE
temperature range of ±55°C to 125°C. The						(TOP VIEW)
SN74ALS20A and SN74AS20 are characterized								NC	CC
for operation from 0°C to 70°C.						1B	1A			2D
									V
		FUNCTION TABLE			NC	3	2	1	20 19		2C
		(each gate)				4				18
					NC						NC
	INPUTS			OUTPUT		5				17
					1C	6				16	NC
A	B	C	D	Y
					NC	7				15	NC
H	H	H	H	L
					1D	8				14	2B
L	X	X	X	H
						9	10 11 12 13
X	L	X	X	H		1Y	GND	NC	2Y	2A
X	X	L	X	H
X	X	X	L	H	NC ± No internal connection

logic symbol²							logic diagram (positive logic)
1								1
			&
1A							1A
2								2
1B				6			1B								6
4						1Y		4								1Y
1C							1C
5								5
1D							1D
9
2A							2A	9
10
2B				8		2Y	2B	10
12															8	2Y
2C							2C	12
13
2D							2D	13

²This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the D, J, and N packages.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 1994, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20

DUAL 4-INPUT POSITIVE-NAND GATES

SDAS192B ± APRIL 1982 ± REVISED DECEMBER 1994

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²

Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 7 V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 7 V
Operating free-air temperature range, TA: SN54ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±55°C to 125°C
SN74ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±65°C to 150°C

²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

recommended operating conditions

		SN54ALS20A			SN74ALS20A			UNIT
		MIN	NOM	MAX	MIN	NOM	MAX
VCC	Supply voltage	4.5	5	5.5	4.5	5	5.5	V
VIH	High-level input voltage	2			2			V
VIL	Low-level input voltage			0.8³			0.8	V
				0.7§
IOH	High-level output current			± 0.4			± 0.4	mA
IOL	Low-level output current			4			8	mA
TA	Operating free-air temperature	± 55		125	0		70	°C

³ Applies over temperature range ± 55°C to 70°C § Applies over temperature range 70°C to 125°C

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

PARAMETER			TEST CONDITIONS		SN54ALS20A		SN74ALS20A		UNIT
					MIN TYP¶	MAX	MIN TYP¶	MAX
VIK	VCC = 4.5 V,			II = ±18 mA		±1.5		±1.5	V
VOH	VCC = 4.5 V to 5.5 V,			IOH = ± 0.4 mA	VCC ± 2		VCC ± 2		V
VOL	VCC = 4.5 V			IOL = 4 mA	0.25	0.4	0.25	0.4	V
				IOL = 8 mA			0.35	0.5
II	VCC = 5.5 V,			VI = 7 V		0.1		0.1	mA
IIH	VCC = 5.5 V,			VI = 2.7 V		20		20	μA
IIL	VCC = 5.5 V,			VI = 0.4 V		± 0.1		± 0.1	mA
I #	V		= 5.5 V,	V = 2.25 V	± 20	± 112	± 30	± 112	mA
O	CC			O
ICCH	VCC = 5.5 V,			VI = 0	0.22	0.4	0.22	0.4	mA
ICCL	VCC = 5.5 V,			VI = 4.5 V	0.81	1.5	0.81	1.5	mA
¶ All typical values are at V		CC	= 5 V, T = 25°C.
			A

# The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265