SN74LS257B - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs
Updated : 2020-01-09 14:43:21Description
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.
Products containing the "SN74LS257B" keyword are: SN74LS257BD , SN74LS257BD , SN74LS257BDE4 , SN74LS257BDG4 , SN74LS257BDR , SN74LS257BDR , SN74LS257BDR2 , SN74LS257BDRG4 , SN74LS257BJ , SN74LS257BJD , SN74LS257BM , SN74LS257BMEL , SN74LS257BML1 , SN74LS257BMR1 , SN74LS257BN , SN74LS257BN , SN74LS257BNE4 , SN74LS257BNG4 , SN74LS257BNS , SN74LS257BNSR
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
| Status | ACTIVE |
| SubFamily | Encoders & decoders |
| Technology Family | LS |
| VCC | 5.25 |
| Bits | 2 |
| Voltage | 5 |
| F @ nom voltage | 35 |
| ICC @ nom voltage | 19 |
| tpd @ Nom Voltage | 21 |
| Rating | Catalog |
| Operating temperature range | 0 to 70 |
| Package Group | PDIP|16 |
| Package size: mm2:W x L (PKG) | See datasheet (PDIP) |
| Approx. price | 0.28 | 1ku |
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