BQ2022_13 Datasheet, PDF (1/20 Pages) Texas Instruments – 1K-BIT SERIAL EPROM WITH SDQ INTERFACE

www.ti.com
Actual Size
(3,00 mm x 3,00 mm)
bq2022
SLUS526F – OCTOBER 2002 – REVISED DECEMBER 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
bq2022s Attached to a Single Host
• Single-Wire Interface to Reduce Circuit Board
Routing
• Synchronous Communication Reduces Host
Interrupt Overhead
• 15KV HBM ESD Compliance
• No Standby Power Required
• Available in a 3-Pin SOT23 Package and TO-92
Package
APPLICATIONS
• Security Encoding
• Inventory Tracking
• Product-Revision Maintenance
• Battery-Pack Identification
The bq2022 SDQ™ interface (TI's proprietary serial
communications protocol) requires only a single
connection and a ground return. The DATA pin is
also the sole power source for the bq2022. 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⁾
T_A ⁽²⁾
PACKAGED DEVICES⁽³⁾
PART
NUMBER
PACKAGE
STATUS
–20°C to
70°C
bq2022DBZR
bq2022LPR
SOT23-3
TO-92
Production
Production
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.
(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 www.ti.com.
(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 bq2022DBZR and 2000 units for
the bq2022LPR.
BLOCK DIAGRAM
DBZ PACKAGE
(TOP VIEW)
SDQ
1
SDQ 1
VSS 2
SDQ Communications
Controller and 8-Bit CRC
Generation Circuit
bq2022DBZ
Internal
Bus
RAM
Buffer
(8 bytes)
ID ROM
(64 bits)
EPROM
MEMORY
(1024 bits)
EPROM
STATUS
(64 bits)
3 VSS
UDG−02054
VSS
3
2
VSS
LP PACKAGE
(BOTTOM VIEW)
1
VSS
2
SDQ
3
NC
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 © 2002–2006, Texas Instruments Incorporated