SLUS938A December   2011  – October 2014

PRODUCTION DATA.  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Pin Configuration and Functions
  6. 6Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Electrical Characteristics: DC
    4. 6.4 Switching Characteristcs: AC
  7. 7Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 EPROM
      2. 7.3.2 EPROM Status Memory
      3. 7.3.3 Error Checking
    4. 7.4 Device Functional Modes
      1. 7.4.1  Customizing the bq2026
      2. 7.4.2  Bus Termination
      3. 7.4.3  Serial Communication
      4. 7.4.4  Initialization
      5. 7.4.5  ROM Commands
        1. 7.4.5.1 Read ROM
        2. 7.4.5.2 Match ROM
        3. 7.4.5.3 Skip ROM
      6. 7.4.6  Memory and Status Function Commands
      7. 7.4.7  Read Memory and Field CRC
      8. 7.4.8  Read Status
      9. 7.4.9  Write Memory
      10. 7.4.10 Write Status
      11. 7.4.11 SDQ Signaling
      12. 7.4.12 Reset and Presence Pulse
      13. 7.4.13 Write
      14. 7.4.14 Read
      15. 7.4.15 Program Pulse
      16. 7.4.16 Idle
      17. 7.4.17 CRC Generation
  8. 8Device and Documentation Support
    1. 8.1 Trademarks
    2. 8.2 Electrostatic Discharge Caution
    3. 8.3 Glossary
  9. 9Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 1536 Bits of One-Time Programmable (OTP) EPROM For Storage Of User-Programmable Configuration Data
  • Factory-Programmed Unique 64-Bit Identification Number
  • Single-Wire Interface to Reduce Circuit Board Routing
  • Synchronous Communication Reduces Host Interrupt Overhead
  • 6KV IEC 61000-4-2 ESD Compliance on Data Pin
  • No Standby Power Required
  • Available in a 3-Pin SOT-23 and TO-92 Packages

2 Applications

  • Security Encoding
  • Inventory Tracking
  • Product-Revision Maintenance
  • Battery-Pack Identification

3 Description

The bq2026 is a 1.5K-bit serial EPROM containing a factory-programmed, unique 48-bit identification number, 8-bit family code, and a 64-bit status register.

The bq2026 SDQ™ interface requires only a single connection and a ground return. The SDQ pin is also the sole power source for the bq2026.

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(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq2026 SOT-23 (3) 4.30 mm × 4.30 mm
TO-92 (3) 2.92 mm × 1.30 mm
  1. For all available packages, see the package option addendum at the end of the datasheet.

Block Diagram

fpd_lus938.gif
NOTE: Pin 3 for LP package can be ground or left unconnected.