Overview
The DS2431P+T&R is a 1024-bit, 1-Wire® EEPROM chip produced by Analog Devices Inc./Maxim Integrated. This device is organized into four memory pages of 256 bits each, providing a robust solution for data storage and traceability. Each DS2431P+T&R has a unique 64-bit ROM registration number that is factory lasered into the chip, ensuring absolute traceability in multidrop 1-Wire network environments. The chip communicates through a single-conductor 1-Wire bus, following the standard 1-Wire protocol, which simplifies the interface and reduces costs.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Memory Density | - | - | - | - | 1 Kbit | - |
| Memory Type | - | - | - | - | EEPROM | - |
| Operating Temperature Range | - | - | -40°C | - | +85°C | - |
| Supply Voltage Range | - | - | 2.8V | - | 5.25V | - |
| IO Voltage Range to GND | - | - | -0.5V | - | +6V | - |
| IO Sink Current | - | - | - | - | 20mA | - |
| Junction Temperature | - | - | - | - | +150°C | - |
| Storage Temperature Range | - | - | -55°C | - | +125°C | - |
| Lead Temperature (excluding UCSP, soldering, 10s) | - | - | - | - | +300°C | - |
| Soldering Temperature (reflow) | - | - | - | - | +250°C (TO-92), +260°C (other packages) | - |
Key Features
- Easily add traceability and relevant information to any individual system.
- 1024 bits of EEPROM memory partitioned into four pages of 256 bits each.
- Individual memory pages can be permanently write protected or put in EPROM-emulation mode (write to 0).
- Minimalist 1-Wire interface lowers cost and interface complexity.
- IEC 1000-4-2 Level 4 ESD protection (±8kV contact, ±15kV air, typ).
- Reads and writes over a wide voltage range from 2.8V to 5.25V from -40°C to +85°C.
- Communicates to host with a single digital signal.
- Switchpoint hysteresis and filtering to optimize performance in the presence of noise.
Applications
- Accessory/PCB 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.
Q & A
- What is the memory density of the DS2431P+T&R?
The DS2431P+T&R has a memory density of 1 Kbit. - What is the operating temperature range of the DS2431P+T&R?
The operating temperature range is from -40°C to +85°C. - What is the supply voltage range for the DS2431P+T&R?
The supply voltage range is from 2.8V to 5.25V. - How does the DS2431P+T&R communicate?
The DS2431P+T&R communicates through a single-conductor 1-Wire bus following the standard 1-Wire protocol. - What is the purpose of the 64-bit ROM registration number in the DS2431P+T&R?
The 64-bit ROM registration number provides a unique identity for absolute traceability in multidrop 1-Wire network environments. - Can individual memory pages of the DS2431P+T&R be write protected?
Yes, individual memory pages can be permanently write protected or put in EPROM-emulation mode (write to 0). - What kind of ESD protection does the DS2431P+T&R have?
The DS2431P+T&R has IEC 1000-4-2 Level 4 ESD protection (±8kV contact, ±15kV air, typ). - What are some common applications of the DS2431P+T&R?
Common applications include accessory/PCB identification, medical sensor calibration data storage, analog sensor calibration, ink and toner print cartridge identification, and after-market management of consumables. - How does the DS2431P+T&R handle data writing?
Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory using a Copy Scratchpad command. - What is the significance of the scratchpad in the DS2431P+T&R?
The scratchpad acts as a buffer when writing to the main memory or the register page, allowing data to be read back and verified before being transferred to its final memory location.
