SLUS724F September   2006  – January 2022 BQ2022A

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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: DC
    6. 6.6 Switching Characteristics: AC
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 1024-Bit EPROM
      2. 7.3.2 EPROM Status Memory
      3. 7.3.3 Error Checking
      4. 7.3.4 Customizing the BQ2022A
      5. 7.3.5 Bus Termination
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1  Serial Communication
      2. 7.5.2  Initialization
      3. 7.5.3  ROM Commands
        1. 7.5.3.1 READ ROM Command
        2. 7.5.3.2 SKIP ROM Command
      4. 7.5.4  Memory/Status Function Commands
      5. 7.5.5  READ MEMORY Commands
        1. 7.5.5.1 READ MEMORY/Page CRC
        2. 7.5.5.2 READ MEMORY/Field CRC
      6. 7.5.6  WRITE MEMORY Command
      7. 7.5.7  READ STATUS Command
      8. 7.5.8  WRITE STATUS Command
      9. 7.5.9  PROGRAM PROFILE Byte
      10. 7.5.10 SDQ Signaling
      11. 7.5.11 RESET and PRESENCE PULSE
      12. 7.5.12 WRITE Bit
      13. 7.5.13 READ Bit
      14. 7.5.14 PROGRAM PULSE
      15. 7.5.15 IDLE
      16. 7.5.16 CRC Generation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Programming Circuit Example
        2. 8.2.2.2 SDQ Master Best Practices
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
      2. 11.2.2 Receiving Notification of Documentation Updates
    3. 11.3 Trademarks
    4. 11.4 Support Resources
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

3 Description

The BQ2022A is a 1-Kbit serial EPROM containing a factory-programmed, unique 48-bit identification number, 8-bit CRC generation, and the 8-bit family code (09h). A 64-bit status register controls write protection and page redirection.

The BQ2022A SDQ™ interface requires only a single connection and a ground return. The DATA pin is also the sole power source for the BQ2022A.

The small surface-mount package options saves printed-circuit-board space, while the low cost makes it ideal for applications such as battery pack configuration parameters, record maintenance, asset tracking, product-revision status, and access-code security.

Device Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
BQ2022A SOT-23 (3) 2.92 mm × 1.30 mm
TO-92 (3) 4.30 mm × 4.30 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.

GUID-33AFD866-50AF-4FA4-A274-1CD5C9ED8313-low.gif Simplified Schematic