Nec B58944 Datasheet ((link))

Sites like Jotrin Electronics and ECUFix specialize in these automotive-grade ICs. Микросхема NEC B58944 D43256BGU-70Y

At its core, the is a surface-mount, high-speed, 256K-bit CMOS static RAM (SRAM) device. It's specifically designed to operate within the demanding environment of a vehicle's electronic systems. The common full part number is D43256BGU-70Y , with "B58944" being a factory marking code printed on the chip's body.

The B58944 serves as a critical memory component within the ECU, handling real-time data storage and retrieval necessary for engine operations such as fuel injection, ignition timing, and air management.

The device integrated into the B58944 is a high-performance with technical specifications that highlight its role in real-time data processing. nec b58944 datasheet

Primarily found in Bosch ECUs for brands like Honda , Iveco , and various Volvo models (e.g., EDC16, ME7 series). Status: Lead-free and RoHS Compliant . Why It’s a "Must-Have" for ECU Repair

Overview

Position the new replacement chip on the pads. Double-check that the Pin 1 orientation dot matches the marking on the circuit board. Sites like Jotrin Electronics and ECUFix specialize in

Always check the specific version of the component (e.g., suffix, tolerance) for precise datasheet values.

If you are sourcing a replacement chip for circuit board repair, you can look for equivalent 32K x 8 asynchronous CMOS SRAMs with a 70ns access speed in a 28-pin SOP package. Direct architectural equivalents include:

What specific is the module presenting?

: The B58944 is often sold as an "empty" chip, meaning it does not contain pre-installed program data and must be integrated into the specific board's system architecture.

Have you encountered the NEC B58944 in a device? Contribute your findings to the comments section or contact the author for inclusion in future updates to this datasheet guide.