Nec B58944 Datasheet 2021 Jun 2026

If you're unable to locate the 2021 version of the datasheet, the specifications are likely to remain similar, given that the component hasn't been updated or discontinued. However, always verify the information with a reliable source to ensure accuracy and compliance with your application's requirements.

8 bi-directional data lines handling 1 byte of information per read/write cycle. Chip Enable ( CE¯modified CE with bar above

Note: Replacement chips are shipped completely unprogrammed ("empty chip"). However, because the B58944 operates strictly as a hardware driver interface, it generally does not contain proprietary software firmware; it relies entirely on the host ECU micro-processor to manage its functions. Sourcing and Datasheet Availability

As a component designed for ECUs, the B58944 is engineered to withstand the harsh conditions found under the hood, including high temperatures and voltage transients typical in automotive power rails. 3. Surface Mount Package (SOP-28)

(Used in many European and South American models, such as Chevrolet S10) Typical Automotive Functions nec b58944 datasheet 2021

While full public datasheets for automotive-grade proprietary chips like the B58944 are often restricted to authorized manufacturers, the following technical profile has been established through industry procurement data:

: It is widely noted in technical communities as a "vulnerable" part, often being the first component to fail on an ECU board during power surges or electrical faults . Key Specifications (Estimated)

Use a digital multimeter in diode-test mode. Check the resistance between the output pins (Pins 18-21, 26-28) and the Power Ground pins (Pins 23, 24). A reading near zero volts indicates an internal transistor breakdown.

Because it is enclosed in an SOP-28 form factor, cracked solder joints frequently develop at the corner pins from engine vibration and rapid temperature swings. If you're unable to locate the 2021 version

: Found in various European and Asian vehicle ECUs, including Volvo (XC70, XC90) and Mercedes-Benz . Sourcing and Documentation

In 2021, the primary demand for the B58944 came from the automotive repair sector, specifically for technicians rebuilding ECU Bosch systems. The IC is crucial for controlling solenoids, injectors, and other actuators that require precise, reliable power management. Primary ECU Compatibility The B58944 is commonly found in: (Honda, Fiat, PSA Group) Bosch ME7.5 & ME7.5.10 Bosch ME7.9.6 & ME7.9.20 Bosch EDC7 (Heavy-duty vehicles)

Finding a single "2021" specific datasheet is rare for this part, as it is an older, specialized automotive component. Technical parameters and inventory details can be requested directly from electronic component suppliers like Jotrin Electronics or ECU Fix Tool .

(Small Outline Package) for surface mounting on ECU circuit boards. Performance Chip Enable ( CE¯modified CE with bar above

However, to help you identify the component and find the correct documentation, here is a

This article provides a comprehensive overview of the NEC B58944, based on its technical characteristics, typical applications, and its role in automotive systems as recognized by industry distributors in 2021. What is the NEC B58944?

The on the aluminum ECU casing (e.g.,0 261...) What fault codes or behaviors the vehicle is exhibiting

: Often cross-referenced with the part number D43256BGU-70Y in some technical documentation, though this sometimes refers to a 256K-bit CMOS Static RAM chip in a similar SOP-28 package .

The silicon design integrates a multi-layered defense mechanism to prevent localized failure from destroying the entire engine control module: