JAJSQJ3E november   1988  – june 2023 SN74HCT257

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 概要
  4. 3 Revision History
  5. 4 Pin Configuration and Functions
  6.   6
  7. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions #GUID-E2584F18-4229-491B-88C0-5C0565546F3D/GUID-6412D0F1-0296-497F-B98D-0D6926824395
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Operating Characteristics
  8. 6 Parameter Measurement Information
  9. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
  10. 8 Device Functional Modes
  11. 9 Power Supply Recommendations
  12. 10Layout
    1. 10.1 Layout Guidelines
  13. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 ドキュメントの更新通知を受け取る方法
    3. 11.3 サポート・リソース
    4. 11.4 Trademarks
    5. 11.5 静電気放電に関する注意事項
    6. 11.6 用語集
  14. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information
    2. 12.2 Mechanical Data

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • N|16
  • D|16
サーマルパッド・メカニカル・データ
発注情報

5.2 Recommended Operating Conditions(1)

SN54HCT257 SN74HCT257 UNIT
MIN NOM MAX MIN NOM MAX
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage VCC = 4.5 V to 5.5 V 2 2 V
VIL Low-level input voltage VCC = 4.5 V to 5.5 V 0.8 0.8 V
VI Input voltage 0 VCC 0 VCC V
VO Output voltage 0 VCC 0 VCC V
tt Input transition (rise and fall) time 500 500 ns
TA Operating free-air temperature −55 125 −40 85 °C
(1) All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.