ROHM BU9889GUL-W User Guide and Manual
Summary
The BU9889GUL-W is an 8Kbit serial EEPROM featuring a compact WLCSP6pin package and I2C BUS interface. Designed for low power and high reliability, it supports a wide voltage range of 1.7-5.5V and is ideal for battery-powered electronics and general-purpose devices.
Page 1 Text Content
High Reliability Series Serial EEPROM Series
WL-CSP EEPROM family I2C BUS
No.10001EAT07
BU9889GUL-W
●Description BU9889GUL-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) 1k words×8 bits architecture 8kbit serial EEPROM. 3) Other devices than EEPROM can be connected to the same port, saving microcontroller port. 4) 1.7～5.5V single power source action most suitable for battery use. 5) FAST MODE 400k Hz at 1.7～5.5V 6) Page write mode useful for initial value write at factory shipment. 7) Auto erase and auto end function at data rewrite. 8) Low current consumption At write operation (5V) : 0.5m A (Typ.) At read operation (5V) : 0.2m A (Typ.) At standby operation (5V) : 0.1µA (Typ.) 9) Write mistake prevention function Write (write protect) function added Write mistake prevention function at low voltage 10) WLCSP6pin compact package 11) Data rewrite up to 100,000 times 12) Data kept for 40 years 13) Noise filter built in SCL / SDA terminal 14) Shipment data all address FFh
●Absolute maximum ratings (Ta=25℃)
Parameter symbol Limits 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 V *1 When using at Ta=25℃ or higher, 2.2m W to be reduced per 1℃
●Memory cell characteristics (Ta=25℃, Vcc=1.7～5.5V)
Limits
Parameter Unit
Min. Typ. Max.
Number of data rewrite times *1 100,000 - - Times Data hold years *1 40 - - Years *1 Not 100% TESTED
●Recommended operating conditions
Parameter Symbol Limits Unit
Power source voltage Vcc 1.7～5.5 Input voltage VIN 0～Vcc
www.rohm.com 2010.01 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BU9889GUL-W User Guide and Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 18 |
| File Size | 405.03 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the operating voltage range of the BU9889GUL-W?
It operates from 1.7V to 5.5V single power supply, suitable for battery use.
How many data rewrite cycles does it support?
It supports up to 100,000 data rewrite cycles (not 100% tested).
What is the maximum SCL frequency?
The maximum SCL frequency is 400 kHz in FAST MODE.
How long can data be retained?
Data is kept for 40 years (not 100% tested).
Does it have a write protect function?
Yes, it has a write protect (WP) pin to prevent accidental writes.