ZHCSQ80D November   1998  – March 2022 CD54HC251 , CD54HCT251 , CD74HC251 , CD74HCT251

PRODUCTION DATA  

  1. 特性
  2. 说明
  3. Revision History
  4. Pin Configuration and Functions
  5. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions (1)
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
  6. Parameter Measurement Information
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. Power Supply Recommendations
  9. Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 术语表
  11. 11Mechanical, Packaging, and Orderable Information

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)
  • J|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

Switching Characteristics

Input tt = 6ns. Unless otherwise specified, CL = 50pF
PARAMETER VCC (V) 25°C -40°C to 85°C -55°C to 125°C UNIT
TYP MAX MAX MAX
HC TYPES
tpd Select to outputs 2 245 305 370 ns
4.5 21(1) 49 61 74
6 42 52 63
tpd Data to outputs 2 175 220 265 ns
4.5 12(1) 35 44 53
6 30 37 45
tpd Enable to high Z and enable from high Z 2 140 175 210 ns
4.5 11(1) 28 35 42
6 24 30 36
tt Output transition times 2 75 95 110 ns
4.5 15 19 22
6 13 16 19
Ci Input capacitance 10 10 10 pF
CO Three-state output capacitance 15 15 15 pF
Cpd(3)(4) Power dissipation capacitance 5 60(2) pF
HCT TYPES
tpd Select to outputs 4.5 18(1) 42 53 63 ns
tpd Data to outputs 4.5 12(1) 35 44 53 ns
tpd Enable to high Z and enable from high Z 4.5 12(1) 30 38 45 ns
tt Output transition times 4.5 15 19 22 ns
Ci Input capacitance 10 10 10 pF
Cpd(3)(4) Power dissipation capacitance 5 60(2) pF
Typical value tested at 5V, CL = 15pF.
Typical value tested at 5V.
CPD is used to determine the dynamic power consumption, per channel.
PD = VCC2fi(CPD + CL) where fi = input frequency, CL = output load capacitance, VCC = supply voltage.