Texas Instruments JM38510-37302BCA, JM38510-37302B2A, SN54ALS27AJ, SN54AS27J, SN74ALS27AD Datasheet

SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27 TRIPLE 3-INPUT POSITIVE-NOR GATES

SDAS112B ± APRIL 1982 ± REVISED DECEMBER 1994

•Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

description

These devices contain three independent 3-input positive-NOR gates. They perform the Boolean functions Y = A •B •C or Y = A + B + C in positive logic.

SN54ALS27A, SN54AS27 . . . J PACKAGE SN74ALS27A, SN74AS27 . . . D OR N PACKAGE

	(TOP VIEW)
1A					VCC
		1	14
1B		2	13		1C
2A		3	12		1Y
2B		4	11		3C
2C		5	10		3B
2Y		6	9		3A
GND		7	8		3Y

The SN54ALS27A and SN54AS27 are
characterized for operation over the full military				SN54ALS27A, SN54AS27 . . . FK PACKAGE
temperature	range of	±55 C	to 125 C. The		(TOP VIEW)
		°	°
SN74ALS27A and SN74AS27 are characterized					1B	1A	NC	CC	1C
for operation from 0°C to 70°C.
								V
	FUNCTION TABLE			2A	3	2	1	20 19		1Y
					4				18
	(each gate)
				NC	5				17	NC
	INPUTS	OUTPUT
				2B	6				16	3C
A	B	C	Y
				NC	7				15	NC
H	X	X	L
				2C	8				14	3B
X	H	X	L		9	10 11 12 13
X	X	H	L		2Y	GND	NC	3Y	3A
L	L	L	H
				NC ± No internal connection

logic symbol²							logic diagram (positive logic)
1							1
1A			≥ 1				1A
2				12			2					12
1B						1Y	1B						1Y
13							13
1C
							1C
3
							3
2A
							2A
4				6
							4					6
2B						2Y
5							2B						2Y
2C							5
9							2C
3A							9
10				8			3A
3B						3Y	10					8
11							3B						3Y
3C							11
							3C

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

SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27

TRIPLE 3-INPUT POSITIVE-NOR GATES

SDAS112B ± 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: SN54ALS27A . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±55°C to 125°C
SN74ALS27A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . 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

		SN54ALS27A			SN74ALS27A			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		SN54ALS27A		SN74ALS27A		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	0.97	1.8	0.97	1.8	mA
ICCL	VCC = 5.5 V,			VI = 4.5 V	2	4	2	4	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