ZHCSPK1A July   2022  – December 2022 SN74LV165A-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Timing Requirements, VCC = 2.5 V ± 0.2 V
    7. 6.7  Timing Requirements, VCC = 3.3 V ± 0.3 V
    8. 6.8  Timing Requirements, VCC = 5 V ± 0.5 V
    9. 6.9  Switching Characteristics, VCC = 2.5 V ± 0.2 V
    10. 6.10 Switching Characteristics, VCC = 3.3 V ± 0.3 V
    11. 6.11 Switching Characteristics, VCC = 5 V ± 0.5 V
    12. 6.12 Operating Characteristics
    13. 6.13 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Balanced CMOS Push-Pull Outputs
      2. 8.3.2 Latching Logic
      3. 8.3.3 Partial Power Down (Ioff)
      4. 8.3.4 Wettable Flanks
      5. 8.3.5 Clamp Diode Structure
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Power Considerations
      2. 9.2.2 Input Considerations
      3. 9.2.3 Output Considerations
      4. 9.2.4 Detailed Design Procedure
      5. 9.2.5 Application Curves
  10. 10Power Supply Recommendations
  11. 11布局
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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8.1 Overview

The SN74LV165A-Q1 device is a parallel-load, 8-bit shift registers designed for 2 V to 5.5 V VCC operation.

When the device is clocked, data is shifted toward the serial output QH. Parallel-in access to each stage is provided by eight individual direct data inputs that are enabled by a low level at the shift/load (SH/ LD) input. The SN74LV165A-Q1 features a clock-inhibit function and a complemented serial output, QH.

Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/ LD is held high and clock inhibit (CLK INH) is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH accomplishes clocking, CLK INH must be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/ LD is held high. The parallel inputs to the register are enabled while SH/ LD is held low, independently of the levels of CLK, CLK INH, or SER.

The SN74LV165A-Q1 is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.