Texas Instruments JM38510-38302BRA, JM38510-38302B2A, SN54AS244AJ, SN54ALS244CJ, SN74ALS244C-1DW Datasheet

		SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
				OCTAL BUFFERS AND LINE DRIVERS
						WITH 3-STATE OUTPUTS
					SDAS142C ± JULY 1987 ± REVISED AUGUST 1995
• 3-State Outputs Drive Bus Lines or Buffer				SN54ALS244C, SN54AS244A . . . J PACKAGE
Memory Address Registers				SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE
• pnp Inputs Reduce dc Loading						(TOP VIEW)
• Package Options Include Plastic					1OE	1		20	VCC
Small-Outline (DW) Packages, Ceramic					1A1	2		19	2OE
Chip Carriers (FK), and Standard Plastic (N)					2Y4	3		18	1Y1
and Ceramic (J) 300-mil DIPs					1A2	4		17	2A4
description					2Y3	5		16	1Y2
					1A3	6		15	2A3
These octal buffers and line drivers are designed					2Y2	7		14	1Y3
					1A4	8		13	2A2
specifically to improve		the performance	and
					2Y1	9		12	1Y4
density of 3-state memory address drivers, clock
					GND	10		11	2A1
drivers, and bus-oriented receivers and
transmitters. With	the	′ALS240A, ′ALS241C,
′AS240A, and ′AS241A, these devices provide the				SN54ALS244C, SN54AS244A . . . FK PACKAGE
choice of selected combinations of inverting						(TOP VIEW)
outputs, symmetrical active-low output-enable					2Y4 1A1		1OE	CC	2OE
(OE) inputs, and complementary OE and OE
								V
inputs.					3	2	1	20 19
				1A2						1Y1
The -1 version of SN74ALS244C is identical to the					4				18
standard version, except that the recommended				2Y3	5				17	2A4
				1A3	6				16	1Y2
maximum IOL for the -1 version is 48 mA. There is
				2Y2	7				15	2A3
no -1 version of the SN54ALS244C.
The SN54ALS244C and SN54AS244A are				1A4	8				14	1Y3
					9	10 11 12 13
characterized for operation over the full military					2Y1	GND	2A1	1Y4	2A2
temperature range of ±55°C to 125°C. The
SN74ALS244C	and	SN74AS244A	are
characterized for operation from 0°C to 70°C.

FUNCTION TABLE (each buffer)

	INPUTS		OUTPUT
		A	Y
	OE
	L	H	H
	L	L	L
	H	X	Z

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 1995, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C ± JULY 1987 ± REVISED AUGUST 1995

logic symbol²									logic diagram (positive logic)
												1
			1						1OE
1OE			2	EN			18	1Y1	1A1			2								18		1Y1
1A1
			4				16
1A2								1Y2
1A3			6				14	1Y3	1A2			4								16		1Y2
			8				12
1A4								1Y4	1A3			6								14		1Y3
			19
				EN
2OE									1A4			8								12		1Y4
			11				9
2A1								2Y1
			13				7
2A2								2Y2				19
			15				5
2A3								2Y3	2OE
			17				3
2A4								2Y4	2A1			11								9		2Y1
² This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.									2A2			13								7		2Y2
																				5
												15
									2A3													2Y3
																				3
												17
									2A4													2Y4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)³

Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 7	V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 7	V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 5.5	V
Operating free-air temperature range, TA: SN54ALS244C . . . . . . . . . . . . . . . . . . . . . . . . . . .	±55°C to 125°C
SN74ALS244C . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±65°C to 150°C

³Stresses 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.

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C ± JULY 1987 ± REVISED AUGUST 1995

recommended operating conditions

				SN54ALS244C			SN74ALS244C			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					0.8²			0.8	V
						0.7³
IOH	High-level output current					± 12			± 15	mA
IOL	Low-level output current					12			24	mA
									48§
TA	Operating free-air temperature			± 55		125	0		70	°C
² Applies over temperature range ± 55°C to 70°C
³ Applies over temperature range 70°C to 125°C
§ Applies only to the -1 version and only if V		CC	is between 4.75 V and 5.25 V

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

PARAMETER			TEST CONDITIONS		SN54ALS244C			SN74ALS244C			UNIT
					MIN	TYP¶	MAX	MIN	TYP¶	MAX
VIK	VCC = 4.5 V,			II = ± 18 mA			± 1.5			± 1.5	V
	VCC = 4.5 V to 5.5 V			IOH = ± 0.4 mA	VCC ± 2			VCC ± 2
VOH				IOH = ± 3 mA	2.4	3.2		2.4	3.2		V
	VCC = 4.5 V			IOH = ± 12 mA	2
				IOH = ± 15 mA				2
				IOL = 12 mA		0.25	0.4		0.25	0.4
VOL	VCC = 4.5 V			IOL = 24 mA					0.35	0.5	V
				IOL = 48 mA (-1 version)					0.35	0.5
IOZH	VCC = 5.5 V,			VO = 2.7 V			20			20	μA
IOZL	VCC = 5.5 V,			VO = 0.4 V			± 20			± 20	μA
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
				Outputs high		9	18		9	17
ICC	VCC = 5.5 V										mA
				Outputs low		15	25		15	24
				Outputs disabled		17	29		17	27
¶ 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.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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