ROHM BU9880GUL-W User Guide and Manual
Summary
This compact serial EEPROM provides reliable, non-volatile memory storage via a universal I²C BUS interface. Designed for general electronic devices—including office equipment, appliances, and communication systems—it ensures stable data retention while consuming ultra-low power in battery-operated applications. The manual details its full technical specifications, including low current consumption rates, high write endurance (1 million cycles), built-in noise filtering, and detailed operational protocols for easy microcontroller integration.
Page 1 Text Content
High Reliability Series Serial EEPROMs
WL-CSP EEPROM family I2C BUS
No.10001EAT19
BU9880GUL-W
●Description BU9880GUL-W is a serial EEPROM of I2C BUS interface method.
●Features 1) Completely conforming to the world standard I2C BUS. All controls available by 2 ports of serial clock (SCL) and serial data (SDA) 2) Other devices than EEPROM can be connected to the same port, saving microcontroller port. 3) 1.7 ~ 5.5V single power source action most suitable for battery use. 4) FAST MODE 400k Hz at 1.7 ~ 5.5V 5) Page write mode useful for initial value write at factory shipment. 6) Auto erase and auto end function at data rewrite. 7) Low current consumption At write operation (5.0V) : 0.5m A (Typ.) At read operation (5.0V) : 0.2m A (Typ.) At standby operation (5.0V) : 0.1µA (Typ.) 8) Write mistake prevention function Write (write protect) function added Write mistake prevention function at low voltage 9) Compact package 10) Data rewrite up to 1,000,000 times 11) Data kept for 40 years 12) Noise filter built in SCL / SDA terminal 13) Shipment data all address FFh
●Page write Product number Number of pages
BU9880GUL-W 32Byte
●Absolute maximum ratings (Ta=25℃)
Parameter symbol Ratings Unit
Impressed voltage VCC -0.3 ~ 6.5 V Permissible dissipation Pd 220 *1 m W Storage temperature range Tstg -65 ~ 125 ℃ Action temperature range Topr -40 ~ 85 ℃ Terminal voltage － -0.3 ~ VCC+1.0 *2 V *1 When using at Ta=25℃or higher, 2.2m W to be reduced per 1℃ *2 The Max value of Terminal Voltage is not over 6.5V.
●Recommended operating conditions
Parameter Symbol Ratings Unit
Power source voltage VCC 1.7 ~ 5.5 Input voltage VIN 0 ~ VCC
www.rohm.com 2010.11 - Rev.A 1/16 © 2010 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BU9880GUL-W User Guide and Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 17 |
| File Size | 396.48 KB |
| Published | June 20, 2026 |
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Frequently Asked Questions
What is the operating voltage range for this EEPROM?
The recommended power source voltage ranges from 1.7 V to 5.5 V.
How reliable is the data storage over time and with writes?
It guarantees up to 1,000,000 data rewrite times and retains data for 40 years.
Can this EEPROM be used in life-critical or safety systems?
No, it is not designed for use in high reliability applications (like medical instruments or aerospace machinery).
What are the advantages of its interface method?
It conforms to the I²C BUS standard, allowing other devices to connect to the same SDA/SCL port.