Overview
The DS2431P-A1+T is a 1024-bit, 1-Wire® EEPROM chip designed for automotive applications, manufactured by Analog Devices Inc./Maxim Integrated. This chip is organized into four memory pages of 256 bits each and features a unique 64-bit ROM registration number that is factory lasered into the chip, ensuring absolute traceability. The DS2431P-A1+T communicates over a single-conductor 1-Wire bus using the standard 1-Wire protocol, making it suitable for various identification and calibration tasks in harsh automotive environments.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Memory Capacity | 1024 bits, organized into four pages of 256 bits each | |
| ROM Registration Number | Unique 64-bit number factory lasered into the chip | |
| Voltage Range | 4.5V to 5.25V | |
| Operating Temperature Range | -40°C to +125°C | |
| Communication Protocol | 1-Wire protocol at 15.4kbps | |
| ESD Protection | IEC 1000-4-2 Level 4 (+8kV Contact, +15kV Air, typ) | |
| Package Type | Thin Small-Outline C-Lead (TSOC) |
Key Features
- 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)
- Switchpoint hysteresis and filtering to optimize performance in noisy environments
- IEC 1000-4-2 Level 4 ESD protection (+8kV Contact, +15kV Air, typ)
- Communicates to host with a single digital signal at 15.4kbps using 1-Wire protocol
- Meets AEC-Q100 Grade 1 qualification requirements
Applications
- Automotive Sensor Identification and Calibration Data Storage
- Automotive Cable Assembly Identification
- 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 capacity of the DS2431P-A1+T?
The DS2431P-A1+T has a memory capacity of 1024 bits, organized into four pages of 256 bits each. - How does the DS2431P-A1+T communicate?
The DS2431P-A1+T communicates over a single-conductor 1-Wire bus using the standard 1-Wire protocol at 15.4kbps. - What is the operating temperature range of the DS2431P-A1+T?
The operating temperature range is -40°C to +125°C. - Does the DS2431P-A1+T have ESD protection?
Yes, it has IEC 1000-4-2 Level 4 ESD protection (+8kV Contact, +15kV Air, typ). - Can individual memory pages be write protected?
Yes, individual memory pages can be permanently write protected or put in EPROM-emulation mode (write to 0). - What is the purpose of the 64-bit ROM registration number?
The 64-bit ROM registration number is used to provide a guaranteed unique identity for absolute traceability. - What are some common applications of the DS2431P-A1+T?
Common applications include automotive sensor identification, cable assembly identification, accessory/PCB identification, and medical sensor calibration. - Does the DS2431P-A1+T meet automotive reliability standards?
Yes, it meets AEC-Q100 Grade 1 qualification requirements. - How is data written to the EEPROM memory?
Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory using the Copy Scratchpad command. - What type of package is the DS2431P-A1+T available in?
The DS2431P-A1+T is available in a Thin Small-Outline C-Lead (TSOC) package.
