DS2431-A1 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – 1024-Bit, 1-Wire EEPROM for Automotive Applications

Rev 0; 11/07
1024-Bit, 1-Wire EEPROM
for Automotive Applications
General Description
The DS2431-A1 is an AEC-Q100 Grade 1 qualified ver-
sion of the DS2431. The logical behavior of both ver-
sions is identical. The DS2431-A1 is a 1024-bit, 1-Wire^®
EEPROM chip organized as four memory pages of 256
bits each. Data is written to an 8-byte scratchpad, veri-
fied, and then copied to the EEPROM memory. As a
special feature, the four memory pages can individually
be write protected or put in EPROM-emulation mode,
where bits can only be changed from a 1 to a 0 state.
The DS2431-A1 communicates over the single-conduc-
tor 1-Wire bus. The communication follows the standard
1-Wire protocol. Each device has its own unalterable
and unique 64-bit ROM registration number that is fac-
tory lasered into the chip. The registration number is
used to address the device in a multidrop 1-Wire net
environment.
Applications
Automotive Sensor Identification and Calibration
Data Storage
Automotive Cable Assembly Identification
Accessory/PCB Identification
Commands and modes are capitalized for clarity.
Typical Operating Circuit
Features
♦ 1024 Bits of EEPROM Memory Partitioned Into
Four Pages of 256 Bits
♦ Individual Memory Pages Can Be Permanently
Write Protected or Put in EPROM-Emulation Mode
(“Write to 0”)
♦ Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
♦ IEC 1000-4-2 Level 4 ESD Protection (8kV Contact,
15kV Air, Typ)
♦ Reads and Writes Over a 4.5V to 5.25V Voltage
Range from -40°C to +125°C
♦ Communicates to Host with a Single Digital
Signal at 15.4kbps or 125kbps Using 1-Wire
Protocol
♦ Meets AEC-Q100 Grade 1 Qualification
Requirements
♦ Also Available as Standard Version for Industrial
Temperature Range (DS2431)
Ordering Information
PART
TEMP RANGE
DS2431P-A1+
-40°C to +125°C
DS2431P-A1+T -40°C to +125°C
+Denotes a lead-free package.
T = Tape and reel.
PIN-PACKAGE
6 TSOC
6 TSOC
Pin Configuration
V_CC
μC
R_PUP
I/O
DS2431-A1
GND
TOP VIEW
+
GND 1
I/O 2
N.C. 3
DS2431-A1
6 N.C.
5 N.C.
4 N.C.
TSOC
1-Wire is a registered trademark of Dallas Semiconductor Corp.,
a wholly owned subsidiary of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.