Texas Instruments 74AC11257PWR, 74AC11257N, 74AC11257DWR, 74AC11257DW, 74AC11257DBR Datasheet

74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS

SCAS049B ± MARCH 1989 ± REVISED JUNE 1996

D3-State Outputs Interface Directly With System Bus

DFlow-Through Architecture Optimizes PCB Layout

DCenter-Pin VCC and GND Configurations Minimize High-Speed Switching Noise

DEPICt (Enhanced-Performance Implanted CMOS) 1-mm Process

D500-mA Typical Latch-Up Immunity at

125°C

DProvides Bus Interface From Multiple Sources in High-Performance Systems

DPackage Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N)

description

DW OR N PACKAGE

(TOP VIEW)

A/B						1	20		1A
		1Y				2	19		1B
		2Y				3	18		2A
GND						4	17		2B
GND						5	16		VCC
GND						6	15		VCC
GND						7	14		3A
		3Y				8	13		3B
		4Y				9	12		4A
									4B
		OE				10	11

This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.

The 74AC11257 is characterized for operation from ±40°C to 85°C.

FUNCTION TABLE

	INPUTS					OUTPUT
	SELECT			DATA
OE						Y
	A/B		A		B
H	X		X		X	Z
L	L		L		X	L
L	L		H		X	H
L	H		X		L	L
L	H		X		H	H

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

EPIC is a trademark of Texas Instruments Incorporated.

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 1996, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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74AC11257

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS

SCAS049B ± MARCH 1989 ± REVISED JUNE 1996

logic symbol²

			10		EN
	OE
		1			G1
	A/B
20
							MUX
	1A				1				2	1Y
19
	1B				1
18
	2A								3	2Y
17
	2B
14
	3A								8	3Y
13
	3B
12
	4A								9	4Y
11
	4B

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

logic diagram (positive logic)

OE	10
A/B	1
1A	20
	2	1Y
1B	19
2A	18
	3	2Y
2B	17
3A	14
	8	3Y
3B	13
4A	12
	9	4Y
4B	11

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS

SCAS049B ± MARCH 1989 ± REVISED JUNE 1996

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

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . ±0.5 V to 7	V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.5 V to VCC + 0.5	V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.5 V to VCC + 0.5	V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±50 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . ±100 mA
Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DW package . . . . .	. . . . . . . . . . . . . 1.6 W
N package . . . . . . .	. . . . . . . . . . . . . 1.3 W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . ±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.

NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2.The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils, except for the N package, which has a trace length of zero.

recommended operating conditions

			MIN	NOM	MAX	UNIT
VCC	Supply voltage		3	5	5.5	V
		VCC = 3 V	2.1
VIH	High-level input voltage	VCC = 4.5 V	3.15			V
		VCC = 5.5 V	3.85
		VCC = 3 V			0.9
VIL	Low-level input voltage	VCC = 4.5 V			1.35	V
		VCC = 5.5 V			1.65
VI	Input voltage		0		VCC	V
VO	Output voltage		0		VCC	V
		VCC = 3 V			±4
IOH	High-level output current	VCC = 4.5 V			±24	mA
		VCC = 5.5 V			±24
		VCC = 3 V			12
IOL	Low-level output current	VCC = 4.5 V			24	mA
		VCC = 5.5 V			24
Dt/Dv Input transition rise or fall rate			0		10	ns/V
TA	Operating free-air temperature		±40		85	°C

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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