Nec B58944 Datasheet File

The "NEC B58944" is a for a NEC Electronics µPD43256BGU-70L 256K-bit CMOS static RAM , packaged in a 28-pin SOP. It is used in critical ECUs primarily from Bosch in various vehicle models. It is a programmable IC requiring specific BDM or OBD tools and procedures , and its failure is linked to common ECU issues like loss of OBD communication. Key equivalent parts include the D43256BGU-70Y , and potential compatibility with low-power -70LL variants should be verified with datasheets. For ECU repair professionals and electronics engineers, this part remains a standard item for restoring functionality to many modern vehicles. When sourcing replacements, relying on reputable suppliers and using component marking references alongside manufacturer part numbers will help ensure successful repairs.

For more information on the NEC B58944, we recommend consulting the following resources: nec b58944 datasheet