SN74LS257BD datasheet(1/8 Pages) ONSEMI

Part #	SN74LS257BD

Description	LOW POWER SCHOTTKY

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Manufacturer	ONSEMI [ON Semiconductor]

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December, 1999 – Rev. 6

1

Publication Order Number:

SN74LS257B/D

SN74LS257B SN74LS258B

Quad 2-Input Multiplexer

with 3-State Outputs

The LSTTL / MSI SN74LS257B and the SN74LS258B are Quad

2-Input Multiplexers with 3-state outputs. Four bits of data from two

sources can be selected using a Common Data Select input. The four

outputs present the selected data in true (non-inverted) form. The

outputs may be switched to a high impedance state with a HIGH on the

common Output Enable (EO) Input, allowing the outputs to interface

directly with bus oriented systems. It is fabricated with the Schottky

barrier diode process for high speed and is completely compatible with

all ON Semiconductor TTL families.

• Schottky Process For High Speed

• Multiplexer Expansion By Tying Outputs Together

• Non-Inverting 3-State Outputs

• Input Clamp Diodes Limit High Speed Termination Effects

• Special Circuitry Ensures Glitch Free Multiplexing

• ESD > 3500 Volts

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

4.75

5.0

5.25

V

TA

Operating Ambient

Temperature Range

0

25

70

°C

IOH

Output Current – High

– 2.6

mA

IOL

Output Current – Low

24

mA

LOW

POWER

SCHOTTKY

Device

Package

Shipping

ORDERING INFORMATION

SN74LS257BN

16 Pin DIP

2000 Units/Box

SN74LS257BD

16 Pin

SOIC

D SUFFIX

CASE 751B

http://onsemi.com

2500/Tape & Reel

PLASTIC

N SUFFIX

CASE 648

16

1

16

1

SN74LS258BN

16 Pin DIP

2000 Units/Box

SN74LS258BD

16 Pin

2500/Tape & Reel

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