Nec B58944 Datasheet Free Now

The NEC B58944 is an automotive integrated circuit (IC) widely used in Bosch Engine Control Units (ECUs). While often referred to by its house part number (B58944), it is technically equivalent to the $\mu$PD43256BGU-70L, a 256K parallel CMOS static RAM (SRAM). Technical Specifications Component Type: Parallel SRAM Package: SOP-28 (Small Outline Package) Capacity: 256 Kib (32K x 8 bits)

Function: Frequently used as an ECU driver or memory chip in Bosch ME7.x and EDC16 series controllers for vehicles like Honda and Iveco. Datasheet and Resources

You can find technical details and replacement info at the following sources:

Datasheet Access: While official NEC/Renesas legacy datasheets can be elusive, technical parameters and PDF links are hosted on Elparts and Jotrin Electronics.

Cross-Reference: For comprehensive timing and pinout details, search for the datasheet of the standard equivalent: $\mu$PD43256B. Social Media Post Idea nec b58944 datasheet Free

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Title: Troubleshooting Bosch ECU issues? Don’t overlook the NEC B58944! 🚗⚡

If you’re working on a Bosch ME7.5 or EDC16 board, you’ve likely seen this SOP-28 chip. It’s a common failure point in automotive modules, but finding the "official" datasheet for house-numbered parts can be a pain.

Quick Specs for your bench:✅ Real Identity: It's a 256K CMOS SRAM ($\mu$PD43256BGU).✅ Package: SOP-28.✅ Common in: Honda, Iveco, and VW/Audi Bosch units. The NEC B58944 is an automotive integrated circuit

Pro-Tip: If you can’t find a replacement labeled "B58944," you can often use a standard 43256 series SRAM with a 70ns access time. Always double-check your pinouts!

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Are you currently repairing an ECU board or looking for a specific equivalent for another Bosch part? NEC B58944 ECU DRIVER SOP-28 - Inovauto.com

Once you download the free PDF, verify these critical specs: Once you download the free PDF, verify these

| Parameter | Typical Range (depending on component type) | | --- | --- | | Polarity | NPN / PNP / N-Channel | | V(BR)CEO | 50V – 200V | | I(C) | 1A – 10A | | P(D) | 1W – 50W | | Package | TO-220, TO-247, or SOT-23 |

(Actual values depend on whether B58944 is a transistor, FET, or protection IC – confirm from the datasheet.)

This site specializes in obsolete components. If NEC stopped making the B58944 in 1995, this is your best bet.

The IC works on a two-stage conversion principle: