BU9897GUL-W is a 128Kbit I2C BUS interface serial EEPROM produced by ROHM. It has the characteristics of low power consumption, high withstand voltage, 400kHZ high-speed communication, automatic erasure and automatic end function.
The BU9897GUL-W is a 128‑Kbit (16,384 × 8 bit) serial EEPROM that uses an I²C‑compatible bus interface. It operates from a single 1.7 V to 5.5 V supply, making it suitable for battery‑powered applications. Features include fast 400 kHz mode, page‑write capability, low standby current, and a data‑retain period of 40 years.
The document lists absolute maximum ratings, recommended operating conditions, pin assignments, timing diagrams, and electrical characteristics such as write current (0.5 mA typ.) and standby current (0.1 µA typ.). It also describes I²C bus communication, write commands, and ordering information for the VCSP‑SOP‑L2 package.
| Memory density | 128 Kbit (16,384 × 8 bit) |
|---|---|
| Supply voltage | 1.7 V – 5.5 V |
| Standby current (5.0 V) | 0.1 µA (Typ.) |
| Write current (5.0 V) | 0.5 mA (Typ.) |
| Read current (5.0 V) | 0.2 mA (Typ.) |
| Maximum I²C clock frequency | 400 kHz |
| Data rewrite endurance | 1,000,000 times |
| Data retention | 40 years |
| Operating temperature range | -40 °C – 85 °C |
| Storage temperature range | -65 °C – 125 °C |
It is a 128‑Kbit EEPROM (16,384 × 8 bit).
The device supports up to 400 kHz SCL frequency.
It can be rewritten up to 1,000,000 times.
The standby current is typically 0.1 µA.