BQ2022A_17 Datasheet, PDF (1/37 Pages) Texas Instruments – 1K-Bit Serial EPROM with SDQ Interface

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bq2022A
SLUS724E – SEPTEMBER 2006 – REVISED MARCH 2016
bq2022A 1K-Bit Serial EPROM with SDQ Interface
1 Features
•1 1024 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
• 15KV IEC 61000-4-2 ESD Compliance on Data
Pin
• No Standby Power Required
• Available in a 3-Pin SOT-23 Package and TO-92
Package
2 Applications
• Security Encoding
• Inventory Tracking
• Product-Revision Maintenance
• Battery-Pack Identification
SPACER
SPACER
3 Description
The bq2022A 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 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⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq2022A
SOT-23 (3)
TO-92 (3)
2.92 mm x 1.30 mm
4.30 mm x 4.30 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
SDQ 1
VSS 2
SDQ Communications
Controller and 8-Bit CRC
Generation Circuit
bq2022A
Internal
Bus
RAM
Buffer
(8 bytes)
ID ROM
(64 bits)
EPROM
MEMORY
(1024 bits)
EPROM
STATUS
(64 bits)
3 VSS
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.