Skip to main content
Log in
ROHM Semiconductor BU9889GUL-WE2 — Memory (DRAM / SRAM / Flash / EEPROM)

BU9889GUL-WE2 EEPROM 8Kbit I²C VCSP50L1, 400 kHz

MPNBU9889GUL-WE2
End of Life

ROHM BU9889GUL-WE2, EEPROM, 8Kbit, I²C, 400 kHz, 1.7V-5.5V, -40°C to 85°C, VCSP50L1 package, Tape & Reel.

$0.62Ref. price · indicative, final on quote
ROHM Semiconductor BU9889GUL-WE2 datasheet (PDF)
Packaging6-UFBGA, CSPBGA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BU9889GUL-WE2 specifications
ParameterValue
Memory typeNon-Volatile
MountingSurface Mount
Supply voltage1.7V ~ 5.5V
Clock frequency400 kHz
Memory interfaceI²C
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
TechnologyEEPROM
Memory size8Kbit
Memory formatEEPROM
Case6-UFBGA, CSPBGA
Memory organization1K x 8
Write cycle time - word, page5ms

Product details

8 Kbit I²C EEPROM in a 6-ball VCSP50L1 package

The ROHM BU9889GUL-WE2 is an 8 Kbit serial EEPROM with an I²C interface, organized as 1 K x 8 bits. The 400 kHz clock frequency matches the standard I²C fast-mode bus speed used by most microcontrollers. Data is non-volatile, with a 5 ms write cycle time per word or page. Typical applications include parameter storage, calibration data, and configuration registers in industrial sensors, telecom modules, and automotive cabin electronics.

Supply range and 1.8 V system compatibility

The 1.7 V minimum supply voltage directly answers the 1.8 V system compatibility question. The 5.5 V upper limit also covers legacy 5 V buses, giving the BOM engineer one part number for mixed-voltage boards.

Package and footprint — VCSP50L1

The 6-UFBGA / CSPBGA package (supplier device package VCSP50L1) is a 0.5 mm pitch, 6-ball array.

Frequently asked questions

Is BU9889GUL-WE2 RoHS compliant?

Yes, the BU9889GUL-WE2 is listed as ROHS3 compliant, meeting the current EU RoHS directive.

Are there equivalents for BU9889GUL-WE2?

The closest functional peer is the BR24T16FVM-WTR, a 16 Kbit I²C EEPROM from the same ROHM family with the same 400 kHz speed, 1.6 V minimum supply, and 5 ms write cycle. The BU9889GUL-WE2 is 8 Kbit, so the BR24T16 offers double the density in a similar footprint — verify pin compatibility before substituting.