Texas Instruments bq2022 Data Sheet
Summary
Discover the bq2022, a versatile 1K-bit One-Time Programmable (OTP) EPROM built for secure identification and robust data storage. Featuring unique ID capabilities and a proprietary SDQ single-wire bus architecture, this chip enables complex asset tracking, product lifecycle management, and reliable battery pack configuration. This guide provides detailed technical specifications on the device's features, including write protection controls and multi-device communication standards. It is essential reading for embedded systems engineers developing applications requiring high-security device authentication.
Page 1 Text Content
查询BQ2022供应商
www.ti.com
SLUS526B − OCTOBER 2002 − REVISED OCTOBER 2003
FEATURES DESCRIPTION 1024 bits of One-Time Programmable (OTP) EPROM For Storage Of User-Programmable
The bq2022 is a 1K-bit serial EPROM containing a factory
Configuration Data
programmed unique 48-bit identification number, 8-bit
Factory-Programmed Unique 64-Bit CRC generation, and the 8-bit family code (09h). A 64-bit Identification Number status register controls write protection and page
Bus-Interface Architecture Allowing Multiple redirection.
bq2022s Attached to a Single Host
The bq2022 SDQ interface (TI’s proprietary serial
Single-Wire Interface to Reduce Circuit
communications protocol) requires only a single
Board Routing
connection and a ground return. The DATA pin is also the
Synchronous Communication Reduces Host
sole power source for the bq2022. The bus architecture
Interrupt Overhead
allows multiple SDQ devices to be connected to a single
No Standby Power Required host. Available in a 3-Pin SOT23 Package
The small surface-mount package options saves APPLICATIONS printed-circuit-board space, while the low cost makes it ideal for applications such as battery pack configuration
Security Encoding
parameters, record maintenance, asset tracking, product-
Inventory Tracking
revision status, and access-code security.
Product-Revision Maintenance
Battery-Pack Identification ORDERING INFORMATION
PACKAGED DEVICES
SOT23−3
−20°C to 70°C bq2022DBZR
(1) Device assured to communicate at −40°C to 85°C. (2) The device is available only in tape and reel with a base quantity of 3000 units.
BLOCK DIAGRAM
DBZR PACKAGE (TOP VIEW)
ID ROM (64 bits)
Internal
SDQ SDQ Communications
Controller and 8-Bit CRC EPROM Generation Circuit MEMORY VSS
(1024 bits)
2VSS VSS VSS
EPROM
STATUS
Buffer
(8 bytes) (64 bits)
UDG−02054
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
!"# $ %& ' # "$ (&)%"# *"#'+ *&%#$ Copyright 2003, Texas Instruments Incorporated
Page Summary Contents For Texas Instruments bq2022 Data Sheet
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 19 |
| File Size | 167.63 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What packaging option is available for this device?
The bq2022 is available in a small, surface-mount 3-Pin SOT23 package to save PCB space.
How does the bq2022 communicate with other devices?
It uses the proprietary SDQ serial interface, which requires only one board routing connection and ground return.
Can I connect multiple bq2022 chips to a single host system?
Yes, its bus architecture supports interconnecting multiple SDQ devices on a single host through interrupt overhead.
What precautions are needed when storing or handling the chip?
Because of limited built-in ESD protection, leads must be shorted together or the device placed in conductive foam for storage and handling.