Texas Instruments SN54ALS541J, SN74ALS540N3, SN74ALS541-1DW, SN74ALS541-1N, SN74ALS541DBR Datasheet

	SN54ALS541, SN74ALS540, SN74ALS541
	OCTAL BUFFERS AND LINE DRIVERS
			WITH 3-STATE OUTPUTS
		SDAS025C ± APRIL 1982 ± REVISED JANUARY 1995
• 3-State Outputs Drive Bus Lines or Buffer	SN54ALS541 . . . J PACKAGE
Memory Address Registers	SN74ALS540, SN74ALS541 . . . DW OR N PACKAGE
• pnp Inputs Reduce dc Loading		(TOP VIEW)
• Data Flow-Through Pinout (All Inputs on		OE1	1		20	VCC
Opposite Side From Outputs)
		A1	2		19	OE2
• Package Options Include Plastic		A2	3		18	Y1
Small-Outline (DW) Packages, Ceramic		A3	4		17	Y2
Chip Carriers (FK), and Standard Plastic (N)		A4	5		16	Y3
and Ceramic (J) 300-mil DIPs		A5	6		15	Y4
description		A6	7		14	Y5
		A7	8		13	Y6
These octal buffers and line drivers are designed		A8	9		12	Y7
		GND	10		11	Y8
to have the performance of the popular
SN54ALS240A/SN74ALS240A series and, at the
same time, offer a pinout with inputs and outputs	SN54ALS541 . . . FK PACKAGE
on opposite sides of the package. This			(TOP VIEW)
arrangement greatly facilitates printed-circuit-		A2	A1	OE1	V	OE2
board layout.
					CC
The 3-state control gate is a 2-input NOR such that	A3	3	2	1	20 19		Y1
if either output-enable (OE1 or OE2) input is high,		4				18
all eight outputs are in the high-impedance state.	A4	5				17	Y2
The SN74ALS540 provides inverted data. The	A5	6				16	Y3
	A6	7				15	Y4
′ALS541 provide true data at the outputs.
	A7	8				14	Y5
The -1 versions of SN74ALS540 and		9	10 11 12 13
SN74ALS541 are identical to the standard		A8	GND	Y8	Y7	Y6
versions, except that the recommended maximum
IOL is increased to 48 mA. There is no -1 version
of the SN54ALS541.

The SN54ALS541 is characterized for operation over the full military temperature range of ±55°C to 125°C. The SN74ALS540 and SN74ALS541 are characterized for operation from 0°C to 70°C.

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

1

SN54ALS541, SN74ALS540, SN74ALS541

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS025C ± APRIL 1982 ± REVISED JANUARY 1995

logic symbols²

					SN74ALS540										′ALS541
	1											1
				&										&
OE1						EN					OE1					EN
	19											19
OE2											OE2
2									18		2							18
A1										Y1	A1								Y1
3								17			3							17
A2										Y2	A2								Y2
4								16			4							16
A3										Y3	A3								Y3
5								15			5							15
A4										Y4	A4								Y4
6								14			6							14
A5										Y5	A5								Y5
7								13			7							13
A6										Y6	A6								Y6
								12										12
8										Y7	8								Y7
A7											A7
9								11			9							11
A8										Y8	A8								Y8

² These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

logic diagrams (positive logic)

	1	SN74ALS540		1	′ALS541
OE1			OE1
OE2	19		OE2	19
A1	2	18	A1	2	18
		Y1			Y1
		To Seven Other Channels			To Seven Other Channels

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: SN54ALS541 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±55°C to 125°C
SN74ALS540, SN74ALS541 . . . . . . . . . . . . . . . . . .	. . 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