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Actual Size
(3,00 mm x 3,00 mm)
SLUS724 – SEPTEMBER 2006
1K-BIT SERIAL EPROM WITH SDQ INTERFACE
FEATURES
•
1024 bits of One-Time Programmable (OTP)
EPROM For Storage Of User-Programmable
Configuration Data
Factory-Programmed Unique 64-Bit
Identification Number
Bus-Interface Architecture Allowing Multiple
bq2022As Attached to a Single Host
Single-Wire Interface to Reduce Circuit Board
Routing
Synchronous Communication Reduces Host
Interrupt Overhead
No Standby Power Required
Available in a 3-Pin SOT23 Package and
TO-92 Package
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 bus
architecture allows multiple SDQ devices to be
connected to a single host.
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.
ORDERING INFORMATION
(1)
PACKAGED DEVICES
(3)
T
A
(2)
•
•
•
•
•
•
PART
NUMBER
bq2022ADBZR
bq2022ALPR
PACKAGE
SOT23-3
TO-92
STATUS
–20°C to 70°C
APPLICATIONS
•
•
•
•
Security Encoding
Inventory Tracking
Product-Revision Maintenance
Battery-Pack Identification
PREVIEW
(1) For the most current package and ordering information, see
the Package Option Addendum at the end of this document, or
see the TI Web site at
(2) Device specified to communicate at –40°C to 85°C
(3) The device is available only in tape and reel with a base
quantity of 3000 units for the bq2022ADBZR and 2000 units for
the bq2022ALPR.
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.
BLOCK DIAGRAM
DBZ PACKAGE
(TOP VIEW)
SDQ
ID ROM
(64 bits)
EPROM
MEMORY
(1024 bits)
RAM
Buffer
(8 bytes)
EPROM
STATUS
(64 bits)
3
VSS
1
3
VSS
SDQ
1
SDQ Communications
Controller and 8-Bit CRC
Generation Circuit
Internal
Bus
VSS
2
LP PACKAGE
(BOTTOM VIEW)
1
2
3
VSS
2
VSS
SDQ
NC
bq2022A
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.
SDQ is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
