Short for Electrically Erasable Programmable ROM, EEPROMs are a type of non-volatile memory that allows data to be written to each address via electric signals.
ROHM EEPROMs are capable of an industry best 1 million rewrites and retains data for up to 40 years. ROHM's unique double cell technology has been incorporated into the entire lineup, resulting in remarkably high reliability (zero accidental defects).

A serial 2-line bus capable of 400kHz operation, it is the de facto standard interface and is widely used in digital consumer electronics, Bluetooth modules, and large household appliances.

A serial 3-line bus capable of 5MHz operation, it is geared towards high-speed communications and is used primarily in vehicles, wireless LANs, DVCs, DSCs, and the like.

A serial 3-line bus capable of 2MHz operation, it is mainly used in vehicles, HDDs, and motherboards.

ROHM's unique high-reliability memory cell construction.
Generally, with competitors, one memory cell is allocated to each bit, resulting in data corruption if the memory cell becomes defective.
ROHM, on the other hand, allocates two cells for each bit. If one cell becomes defective the other takes over, preventing data corruption, protecting the customer's important data.

This is when a defect occurs by chance in a memory cell during normal operation, resulting in memory corruption.
There are limitations on the number of times an EEPROM memory cell can be rewritten. ROHM guarantees the highest number of rewrites: 1 million times. Companies normally do not normally guarantee a chance defect will not occur within a number of times - they only confirm that all bits are normal at shipping.
ROHM has developed double-cell construction to reduce the rate of chance defects for greater data reliability.

Please note that we cannot handle discontinued products. We ask that you look into replacement part numbers. Please refer to the discontinued part number list.

The built-in low-voltage write error protection circuit (LVcc circuit) is activated, preventing writing.
Power ON precaution: Please start up the Power On Reset (P.O.R.) circuit to ensure normal operation.

A function that resets the IC internally when the power is turned ON. When the power is turned ON the internal IC circuits and set pass through an unstable low voltage region as the Vcc rises, making it important to internally reset the IC during power up. The recommended conditions for operating the P.O.R. circuit are indicated the data sheet.

It refers to each address.

Data corruption may occur.

Data is guaranteed for 40 years after the last rewrite has ended.

It is the amount of time for a single command input.

I²C BUS
  Write time is defined as the time it takes to write one byte/page.

SPI BUS
  Write time is defined as the time it takes to write one byte/page.

Microwire Bus (BR93L□□ Series, BR93H□□ Series).
  Write time is the time it takes to write one byte in one Write cycle (WRITE) as well as the time to write all addresses in a single Write All Addresses cycle (WRAL).

Operation at 100kHz max. is called STANDARD MODE, while FAST MODE indicates operation at 400kHz max.
Conditions: 1.8VVcc<2.5V (100kHz max.), 2.5VVcc 5.5V (400kHz max.)

That ROHM EEPROMs comply with the RoHS Directive.