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BR24L02NUX-WTR

A: The BR24L02NUX-WTR is optimized for low‑power, wide‑voltage applications. The table below summarises its core specifications, drawn directly from manufacturer data and distributor sources: Specification Value Memory Capacity 2 Kbit (256 bytes) Memory Organization 256 × 8 bits Interface I²C (2‑wire serial) Clock Frequency (fSCL) 400 kHz Write Cycle Time (tWC) 5 ms (max, self‑timed) Supply Voltage (VCC) 1.8 V to 5.5 V (wide range) Write Endurance 1,000,000 (1 million) cycles (min) Data Retention 100 years (min) Operating Temperature –40 °C to +85 °C (industrial grade) Package Type VSON008X2030 (8‑UFDFN with exposed pad) RoHS / Halogen‑Free RoHS3 compliant, Lead‑free MSL (Moisture Sensitivity Level) 1 (unlimited) The device features built‑in hardware write protection via the WP pin, noise suppression filters on the I²C pins, and an internal Power‑On Reset (POR) circuit with a Low VCC Voltage Inhibit (LVCC) function, which prevents accidental data writes during unstable power‑up or low‑voltage conditions.

A: The device uses a standard I²C (2‑wire) serial interface. The 8‑pin VSON package provides: SDA: Serial data input / output (open‑drain, requires pull‑up resistor). SCL: Serial clock input (clocked by the host). WP: Write Protect pin (when tied high, writes to the entire memory array are inhibited). A0, A1: Device address selection pins (the third address pin A2 is Not Connected for the 2‑Kbit density). The device occupies the 1010xxx I²C slave address family (7‑bit). The A0 and A1 pins allow physical configuration of the I²C slave address, enabling up to four BR24L02NUX‑WTR devices to share the same I²C bus without address conflicts (A2 is NC, so only A0 and A1 are effective). This addressing flexibility is particularly useful for systems requiring multiple non‑volatile memory chips on the same 2‑wire bus.

A: The BR24L02NUX‑WTR is engineered for long‑term reliability. Key reliability specifications include: Write Endurance: 1,000,000 (1 million) write/erase cycles (minimum) Data Retention: 100 years (minimum) Write Cycle Time: Self‑timed, 5 ms maximum Low‑voltage Protection: The built‑in LVCC circuit automatically inhibits write operations when VCC drops below the LVCC threshold (Typ. 1.2 V), preventing accidental data corruption during power‑off or brown‑out conditions Noise Immunity: On‑chip noise suppression filters on the SDA and SCL pins ensure robust operation in electrically noisy environments These reliability figures, combined with the industrial temperature rating, make the device suitable for applications that require frequent data updates (e.g., data logging) as well as long‑term data integrity.

A: Thanks to its 2‑Kbit capacity, ultra‑compact VSON package (2 × 3 mm), wide operating voltage (1.8 V – 5.5 V), low power consumption, industrial temperature range (–40 °C to +85 °C), and high reliability (1M cycles), the BR24L02NUX‑WTR is well‑suited for a broad range of electronic systems. Typical applications include: Consumer electronics: Storing user settings, device preferences, and calibration data in smartphones, tablets, wearables, and other portable devices Industrial control systems: Storing system configuration parameters, calibration constants, and operational logs in PLCs, industrial sensors, and HMIs Medical devices: Securely storing critical device identification, calibration information, and patient data in portable diagnostic equipment and patient monitors Automotive electronics: For engine control units (ECUs), body control modules, and infotainment systems where reliable non‑volatile memory is essential IoT devices and sensors: Handling data logging, device configuration, and small‑scale data storage in battery‑powered and space‑constrained wireless modules ⚠️ Important Lifecycle Information: The product lifecycle status for the BR24L02NUX‑WTR is currently conflicting across distributor databases. Many authoritative sources, including Allicdata, Bonchip, and Cytech Systems, list the part status as “Active” or “在售” (In stock), indicating ongoing active manufacturing and availability. Some sources specifically mark the part status as Active and RoHS3 compliant. However, other distributor listings note the product as (Discontinued / Obsolete). Given this conflicting information, engineers are strongly advised to verify current lifecycle status, availability, and lead times directly with an authorised ROHM Semiconductor distributor before committing this part to volume production or a new design. For projects requiring assured long‑term supply, alternative 2‑Kbit I²C EEPROM devices from other manufacturers (such as the Microchip AT24C02C series, ON Semiconductor CAT24C02 series, or STMicroelectronics M24C02 series) offer similar specifications and may provide more consistent availability depending on regional supply chains. The manufacturer also notes that, for the related BR24L02 family, the product cannot be used for new designs (Not recommended for design diversion), which further supports the recommendation that designers should evaluate current active alternatives for new projects.