SN74S257 Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs | TI.com

SN74S257
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Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs - SN74S257
Datasheet
 

Description

These devices are designed to multiplex signals from four-bit data sources to four-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output control pin (G\) is at a high-logic level.

Series 54LS and 54S are characterized for operation over the full military temperature range of -55°C to 125°C; Series 74LS and 74S are characterized for operation from 0°C to 70°C.

 

Features

  • Three-State Outputs Interface Directly with System Bus
  • 'LS257B and 'LS258B Offer Three Times the Sink-Current Capability of the Original 'LS257 and 'LS258
  • Same Pin Assignments as SN54LS157, SN74LS157, SN54S157, SN74S157, and SN54LS158, SN74LS158, SN54S158, SN74S158
  • Provides Bus Interface from Multiple Sources in High-Performance Systems

Off state (worst case)

 

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
SN74S257 Order now S         20     -6.5     Catalog     0 to 70     PDIP | 16     16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)    
SN54S257 Samples not available S     4.5     5.5     20/-6.5       Military     -55 to 125     CDIP | 16
CFP | 16    
16CDIP: 135 mm2: 6.92 x 19.56 (CDIP | 16)
16CFP: 69 mm2: 6.73 x 10.3 (CFP | 16)