C0098C0113C0050C0048C0050C0050
SLUS526B − OCTOBER 2002 − REVISED OCTOBER 2003
C0049C0075C0262C0066C0073C0084 C0083C0069C0082C0073C0065C0076 C0069C0080C0082C0079C0077 C0087C0073C0084C0072 C0083C0068C0081 C0073C0078C0084C0069C0082C0070C0065C0067C0069
C0040C0051C0044C0048C0048 C0109C0109 C0120 C0051C0044C0048C0048 C0109C0109C0041
C0065C0099C0116C0117C0097C0108 C0083C0105C0122C0101
FEATURES
C0068 1024 bits of One-Time Programmable (OTP)
EPROM For Storage Of User-Programmable
Configuration Data
C0068 Factory-Programmed Unique 64-Bit
Identification Number
C0068 Bus-Interface Architecture Allowing Multiple
bq2022s Attached to a Single Host
C0068 Single-Wire Interface to Reduce Circuit
Board Routing
C0068 Synchronous Communication Reduces Host
Interrupt Overhead
C0068 No Standby Power Required
C0068 Available in a 3-Pin SOT23 Package
APPLICATIONS
C0068 Security Encoding
C0068 Inventory Tracking
C0068 Product-Revision Maintenance
C0068 Battery-Pack Identification
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
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
T
A
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
ID ROM
(64 bits)
EPROM
MEMORY
(1024 bits)
EPROM
STATUS
(64 bits)
SDQ Communications
Controller and 8-Bit CRC
Generation Circuit
Internal
Bus
RAM
Buffer
(8 bytes)
SDQ 1
2VSS 3 VSS
UDG−02054
1
DBZR PACKAGE
(TOP VIEW)
SDQ
VSS
VSS
2
3
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046 C0080C0114C0111C0100C0117C0099C0116C0115
C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115 C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046
C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101 C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
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.
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Copyright  2003, Texas Instruments Incorporated