Nec B58944 Datasheet Jun 2026

To safely integrate or substitute this component, engineering logic dictates adherence to the operational limits specified in the manufacturer's reference datasheet: : 256 Kibit (

Temperature control in white goods such as refrigerators, washing machines, and ovens.

The is a specialized automotive integrated circuit (IC) widely recognized as a critical core driver chip in engine control units (ECUs) . Manufactured primarily by NEC (with legacy production tied to Bosch automotive modules), this chip acts as an essential engine drive interface in systems like the Bosch EDC16, ME7.4.4, ME7.5, and EDC7.

: Offers stringent quality control and worldwide shipping.

Practical summary for repair/modification nec b58944 datasheet

The 28-pin Small Outline Package (SOP-28) optimizes board space while handling localized thermal dissipation. In a standard diagnostic setup for the B58944 layout, the pin distribution is categorized into three functional groups:

: It filters out transient spikes and electrical noise from the engine bay before they reach the main CPU.

This component is widely utilized inside to handle critical, real-time computational data processing. This comprehensive deep-dive covers its architectural structure, core technical specifications, package parameters, and common troubleshooting use-cases found in automotive module repair. Core Overview and Architecture

The B58944 features a standard asynchronous SRAM footprint. It separates the address bus, data bus, and control lines to ensure straightforward interfacing with 8-bit, 16-bit, or 32-bit automotive microcontrollers. Pinout Description (Standard 28-Pin SOP) Pin Number Function Type Description A0 – A14 Address Inputs : Selects one of the 32,768 memory locations. 11 - 13, 15 - 19 I/O1 – I/O8 Input/Output : Offers stringent quality control and worldwide shipping

Stalling, non-starting, or intermittent sensor errors can sometimes be traced back to a damaged B58944 chip. ECU Board Repair:

The NEC B58944 datasheet provides a comprehensive list of electrical characteristics, including:

| Parameter | Symbol | Typical Value | Unit | Test Conditions | | :--- | :---: | :---: | :---: | :--- | | Turn-on Time | $t_on$ | 0.7 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ | | Storage Time | $t_stg$ | 4.0 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ | | Fall Time | $t_f$ | 0.4 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ |

If you tell me the or the Bosch part number on your ECU casing, I can help you confirm if this chip is the correct replacement for your repair. B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics This component is widely utilized inside to handle

: 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.

: Built to withstand the harsh thermal environments typical of an engine bay.

Typical application & context

The is a specialized automotive integrated circuit (IC) predominantly recognized as an Engine Control Unit (ECU) memory driver chip . Manufactured by NEC Electronics (now part of Renesas Electronics), it functions as a 256 Kibit Parallel Static Random-Access Memory (SRAM) chip equivalent to the standard industry part number μPD43256BGU-70L .