SN74AS257

PinoutSpecificationsSupply voltage, VCC. . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . .. . . . .... .......... . . 7 VInput voltage, VI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..................7 VVoltage applied to a ...

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SN74AS257 Picture
SeekIC No. : 004498397 Detail

SN74AS257: PinoutSpecificationsSupply voltage, VCC. . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . .. . . . .... .......... . . 7 VInput voltage, VI. . . . . . . . . . . . . . . . . . ...

floor Price/Ceiling Price

Part Number:
SN74AS257
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/24

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Product Details

Description



Pinout

  Connection Diagram


Specifications

Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . .  . .. . . . . . . . . . . . . . .. . . . .... .......... . . 7 V
Input voltage, VI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..................7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . .............. 5.5 V
Maximum power dissipation at TA = 55°C (in still air) (see Note 1):D package............. 1.3 W
                                                                                                          N package.... .........1.1 W
Operating free-air temperature range, TA:SN54ALS257A, SN54ALS258A ....55°C to 125°C
                                                                  SN74ALS257A, SN74ALS258A............ 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . ...................65°C to 150°C



Description

These SN74AS257 data selectors/multiplexers are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE</a>) input is at a high logic level.

The SN54ALS257A and SN54ALS258A are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS257A, SN74ALS258A, SN74AS257, and SN74AS258are characterized for operation from 0°C to 70°C.




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