BQ2022
FEATURES
D 1024 bits of One-Time Programmable (OTP)
EPROM For Storage Of User-Programmable Configuration Data
D Factory-Programmed Unique 64-Bit
Identification Number
D Bus-Interface Architecture Allowing Multiple bq2022s Attached to a Single Host
D Single-Wire Interface to Reduce Circuit
Board Routing
D Synchronous munication Reduces Host
Interrupt Overhead
D No Standby Power Required D Available in a 3-Pin SOT23 Package
APPLICATIONS D Security Encoding D Inventory Tracking D Product-Revision Maintenance D Battery-Pack Identification
BLOCK DIAGRAM
DESCRIPTION
The bq2022 is a 1K-bit 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 bq2022 SDQ interface (TI’s proprietary serial munications protocol) requires only a single connection and a ground return. The DATA pin is also the sole power source for the bq2022. The bus...
