GENERAL DESCRIPTION
The DS2431 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, verified, 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 communicates over the
single conductor 1-Wire bus. The communication follows the standard
Dallas Semiconductor 1-Wire protocol. Each device has its own
unalterable and unique 64-
bit ROM registration number that is factory lasered into the chip.
The registration number is used to address the device in a
multidrop 1-Wire net environment.
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)
Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from
-40°C to +85°C
Communicates to Host with a Single Digital Signal at 15.4kbps or
111kbps Using 1-Wire Protocol
APPLICATIONS
Accessory/PC Board Identification
Medical Sensor Calibration Data Storage
Analog Sensor Calibration Including IEEE
P1451.4 Smart Sensors
Ink and Toner Print Cartridge Identification
After-Market Management of Consumables
