SN74LS257B Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs | TI.com

SN74LS257B (ACTIVE) 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 - SN74LS257B
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 Function Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) Configuration Type IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Bits (#) Digital input leakage (Max) (uA) ESD CDM (kV) ESD HBM (kV)
SN74LS257B Order now Encoder
Multiplexer    
LS     4.75     5.25     4     5     35     19     21     2:1     3-State Output     24     -2.6     Catalog     0 to 70     PDIP | 16
SOIC | 16
SO | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SO: 80 mm2: 7.8 x 10.2 (SO | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
2     5     0.75     2    
SN54LS257B Samples not available Encoder/Multiplexer     LS     4.5     5.5     4     5     35     19     21     2:1     3-State Output     24/-2.6       Military     -55 to 125     CDIP | 16
CFP | 16
LCCC | 20    
16CDIP: 135 mm2: 6.92 x 19.56 (CDIP | 16)
16CFP: 69 mm2: 6.73 x 10.3 (CFP | 16)
20LCCC: 79 mm2: 8.89 x 8.89 (LCCC | 20)    
2     5     0.75     2