Nec B58944 Datasheet Free Verified Jun 2026

Based on internal structure and common search patterns, the is most likely one of two things:

- Many distributors list the component under the Infineon brand, particularly with date codes from 2006 onward.

Managing solenoids for fuel injection or transmission control.

✅ Real Identity: It's a 256K CMOS SRAM ($\mu$PD43256BGU).✅ Package: SOP-28.✅ Common in: Honda, Iveco, and VW/Audi Bosch units. nec b58944 datasheet Free

Technically, the B58944 is often cross-referenced or identified as being equivalent to the , which is a 256 Kib Parallel SRAM chip manufactured by NEC Electronics in an SOP-28 (SO-28) footprint. Technical Summary Manufacturer: NEC Electronics (now Renesas) . Equivalent Model: μPD43256BGU-70L. Package Type: SOP-28 / SO-28. Function: ECU Driver / Static RAM (SRAM).

Websites like ALLDATASHEET, DatasheetCatalog, and Digi-Key's archived TechForum host legacy PDFs. Search strictly for "B58944" or "2SB58944".

Part: B58944 • SO-28 • datasheet, pdf, info ... - Elparts Based on internal structure and common search patterns,

: Provides information about available stock and technical details for the B58944.

A: At the time of this writing, a comprehensive, official NEC datasheet for the B58944 is not readily available through standard free datasheet repositories. This is because the component is likely a custom-marked part manufactured specifically for automotive OEMs like Bosch. However, using the search strategies outlined above, you can gather sufficient technical information for most repair applications.

The following specifications are derived from the official NEC μPD43256B series datasheet and the D43256BGU-70L variant, which is fully applicable to the D43256BGU-70Y . Package Type: SOP-28 / SO-28

For standard power packages like the TO-220 or TO-3P variant of this component, the pin configuration typically follows standard industry layouts:

Typically 70ns (indicated by the "-70" suffix). Common Applications

Activating relays for fuel pumps, cooling fans, and lighting systems.