ZHCSSC5E november   1988  – june 2023 SN74HCT257

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 说明
  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 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表
  14. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information
    2. 12.2 Mechanical Data

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • N|16
  • D|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

5.4 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC TA = 25°C SN54HCT257 SN74HCT257 UNIT
MIN TYP MAX MIN MAX MIN MAX
VOH High level output voltage VI = VIH or VIL IOH = −20 µA 4.5 V 4.4 4.499 4.4 4.4 V
IOH = −6 mA 3.98 4.3 3.7 3.84
VOL L Low level output voltage VI = VIH or VIL IOL = 20 µA 4.5 V 0.001 0.1 0.1 0.1 V
IOL = 6 mA 0.17 0.26 0.4 0.33
II Input leakage current VI = VCC or 0 5.5 V ±0.1 ±100 ±1000 ±1000 nA
IOZ Off-State (High-Impedance State) Output Current VO = VCC or 0, VI = VIH or VIL 5.5 V ±0.01 ±0.5 ±10 ±5 µA
ICC Supply current VI = VCC or 0, IO = 0 5.5 V 8 160 80 µA
ΔICC(2) Supply-Current Change One input at 0.5 V or 2.4 V,
Other inputs at 0 or VCC		 5.5 V 1.4 2.4 3 2.9 mA
Ci Input Capacitance 4.5 V to 5.5 V 3 10 10(1) 10 pF
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
(2) This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.