Maxim DS2431 1024-Bit 1-Wire® EEPROM

The Maxim 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. The four memory pages of the Maxim IC DS2431 can be individually write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS2431 EEPROM chip communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each DS2431 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. These Maxim EEPROM devices are designed for use in a variety of applications, including accessory / PCB identification, medical sensor calibration data storage, and analog sensor calibration.

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, typical)
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 125kbps Using 1-Wire Protocol

Applications