DS2431P

DS2431P is a Maxim/Dallas 1‑Wire EEPROM with 1 Kbit of nonvolatile storage (128 bytes). It’s accessed over the single data line plus ground (or parasite-powered from the line) using standard 1‑Wire memory commands. Each device carries a unique ROM ID and can be read/written via 1‑Wire, making it suitable for parameter storage, calibration data, device configuration, and simple data logging in embedded systems or iButton projects. The P variant typically denotes packaging/lead‑free options; exact specs (temperature range, packaging) should be confirmed in the datasheet. Key advantages: tiny 2‑wire-like interface (single wire data), no external address bus, simple integration. Important notes: implement correct 1‑Wire timing, CRC checks, and proper power management (external Vdd or parasite power) for reliable operation.

DS2431P features (concise):
- 1‑Kb (128‑byte) 1‑Wire EEPROM memory
- Unique 64‑bit ROM ID with family code 0x23
- Password‑protected memory for secure read/write operations
- 1‑Wire interface with parasite-power capability
- Wide supply range: 2.8–5.5 V; operates from -40 °C to +85 °C
- Data integrity via built‑in CRC checks
- Low‑pin, compact package suitable for identification and secure storage applications (e.g., asset tracking, security tokens)
Note: exact memory map and password details are device‑specific; refer to the DS2431P datasheet for exact protection scheme and command set.

- Pin count: 3 pins (Vcc, GND, DQ/data)
- Function: 1‑Wire 1‑Kbit EEPROM memory (DS2431 family) accessible via the 1‑Wire protocol; nonvolatile data storage (parasite or Vcc powered).

- Manufacturer: Dallas Semiconductor (the “DS” in DS2431P).
- What kind of company: A semiconductor company that designs and manufactures integrated circuits and related electronic components (notably 1-Wire devices). Dallas Semiconductor was acquired by Maxim Integrated in 2001; Maxim is now part of Analog Devices.

DS2431P is a 1-Wire EEPROM IC used for simple, low-cost data storage and device identification. Key application areas include:
- Product authentication and anti-counterfeiting (unique ID, secure seals)
- Calibration, configuration, and parameter storage for automotive/industrial equipment
- Local data logging and event stamping near the device
- Asset tracking, inventory management, warranty/serial tracking
- Access control, time stamping, and audit trails
- IoT/edge devices requiring offline data retention and quick identification

DS2431P is in an 8-pin plastic DIP (DIP-8) package.