ROHM BU99901GUZ-W Product Specifications and User Guide
Summary
This serial EEPROM provides reliable, non-volatile data storage using a standard I²C BUS interface. The associated technical manual offers comprehensive details on electrical characteristics, featuring support for Fast Mode at 400kHz and advanced functions like page write mode and write mistake prevention. Ideal for embedded system designers creating battery-powered electronics that require compact integration and minimal microcontroller ports. It ensures data integrity over thousands of rewrite cycles while maintaining ultra-low power consumption.
Page 1 Text Content
High Reliability Serial EEPROMs
WL-CSP EEPROM family I2C BUS
No.10001EAT15
BU99901GUZ-W
●Description BU99901GUZ-W series 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) 1.7～3.6V single power source action most suitable for battery use. 4) FAST MODE 400k Hz at 1.7～3.6V 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 (3.3V) : 0.6m A (Typ.) At read operation (3.6V) : 0.6m A (Typ.) At standby operation (3.6V) : 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 100,000 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 BU99901GUZ-W Number of pages 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.
●Memory cell characteristics (Ta=25℃, Vcc=1.7～3.6V)
Limits
Parameter Unit
Min. Typ. Max.
Number of data rewrite times *1 1,000,000 － － Times Data hold years *1 40 － － Years *1 Not 100% TESTED
●Recommended operating conditions
Parameter Symbol Ratings Unit
Write 2.7～3.3
Power source voltage Vcc
Read 1.7～3.6
Input voltage VIN 0～Vcc V
www.rohm.com 2010.09 - Rev.A 1/16 © 2010 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BU99901GUZ-W Product Specifications and User Guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 17 |
| File Size | 411.72 KB |
| Published | June 19, 2026 |
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Frequently Asked Questions
What is the maximum number of data rewrites possible?
The memory can handle up to 100,000 data rewrite cycles.
Does this device save microcontroller ports?
Yes, it allows other devices besides the EEPROM to be connected to the same SCL/SDA port.
What is the recommended voltage range for reading data?
The read operation recommends a voltage (Vcc) between 1.7V and 3.6V.
Can this chip be used in mission-critical systems (e.g., medical or aerospace)?
No, it explicitly warns that the product is not designed for high-reliability or life-threatening critical applications.