The DS2431P+T&R is a 1024bit, 1-wire EEPROM in 6 pin TSOC package. This chip is organized as four memory pages of 256bits each. Data is written to an 8byte scratchpad is verified and then copied to 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 1 to 0 state. The DS2431P+T&R communicates over the single conductor 1-wire bus. The communication follows the standard 1-wire protocol. Each device has its own unalterable and unique 64bit 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. The device is used in PCB identification, analogue sensor calibration including IEEE P1451.4 smart sensors, ink and toner print cartridge identification and after market management of consumables.
Feature
Reads and writes over a wide voltage range from 2.8V to 5.25V
Operating temperature range from -40°C to 85°C
Easily add traceability and relevant information to any individual system
Individual memory pages can be permanently write protected or put in EPROM emulation mode
Switchpoint hysteresis and filtering to optimize performance in presence of noise
Minimalist 1-wire interface lowers cost and interface complexity
IEC 1000-4-2 level 4 ESD protection (±8KV contact, ±15KV air)
Communicates to host with single digital signal at 15.4Kbps or 125Kbps
Recovery time of 5µs (standard speed, RPUP = 2.2Kohm) & 2µs (overdrive speed, RPUP = 2.2Kohm)
Maximum reset low time of 640µs (standard speed) & 80µs (overdrive speed)
Applications
Accessory/PC Board Identification
After-Market Management of Consumables
Analog Sensor Calibration Including IEEEP 1451.4 Smart Sensors
Ink and Toner Print Cartridge Identification
Medical Sensor Calibration Data Storage
(Picture: Diagram)
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
