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ROHM Launches New Faster 125°C Operation Compatible EEPROMs

ROHM has introduced the new 125°C operation compatible I2C bus EEPROMs, BR24H-5AC series targeting applications that require data storage under harsh environments, such as factory settings for onboard cameras and sensors, airbag operating history, and data logging for always-on operating industrial automation systems and servers.

ROHMThe BR24H-5AC series of 125°C operation compatible EEPROMs is the first in the industry to achieve a writing time of 3.5ms by implementing original data writing and reading circuit technology, reducing writing time by 30% compared to the 5ms of conventional products.

Additionally, in contrast to standard products capable of just 1 million rewrites, the BR24H-5AC series guarantees up to four million writing cycles by data endurance, which not only extends application service life but is ideal for data loggings requiring frequent data rewrites.

This latest series of I2C bus EEPROMs is designed to reduce process time before factory shipment in automotive and industrial equipment applications.

  1. The industry’s fastest I2C bus EEPROMs reduce initial writing time by 30%

The BR24H-5AC series achieves the fastest writing time on the market for 125°C operation compatible I2C bus EEPROMs, clocking in at an unprecedented 3.5ms. This makes it possible to reduce writing time by 30 % over the conventional while contributing to greater reliability in emergency data logging systems.

  1. Enables up to 4 million rewrites, contributing to longer application life

This new series has achieved an industry-leading four million rewrites – 4 times more than standard products that guarantee just 1 million rewrites. This not only extends application service life but also makes it ideal for data logging applications requiring frequent data rewrites.

  1. Low 1.7V operation ideal for battery-driven applications

Support for low voltage operation makes it possible to be adopted by not only general 3V and 5V types, but 1.8V battery applications as well, such as keyless entry. 

  1. Meets international high-reliability requirements

In addition to qualification under the AEC-Q100 worldwide automotive reliability standard, the BR24H-5AC series supports high temperatures up to 125°C and integrates ECC (Error Check and Correction) functionality to protect important data from accidental memory failures.

Application Examples:

  • Storing factory settings (e.g. onboard cameras) for ADAS
  • Ignition ON/OFF history
  • Cluster mileage display
  • Operating history (e.g. airbags), emergency data logging
  • Retaining settings for car navigation/audio
  • Data logging for industrial automation systems


Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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