Nec B58944 Datasheet 2021 <PLUS>
, typically found in Bosch systems such as the EDC16 diesel engine computer. In some technical documentation and inventory listings, it is cross-referenced or identified as the D43256BGU-70Y , which is a 256K-bit CMOS Static RAM. Key Technical Specifications Manufacturer Package Type SOP-28 (Small Outline Package, 28-pin) Primary Function ECU Driver / Solid State High-Side Relay Memory Specs 32K words x 8 bits (if identified as D43256BGU) Access Time Voltage Supply 4.5V to 5.5V (Standard CMOS) Operating Temp 0°C to 70°C (Standard) Applications and Features Engine Control:
Routes switched currents directly to external solenoids, injectors, or relays. High-current capacity with integrated flyback protection. Ties into the main PCB copper plane.
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Built-in clamp diodes safely absorb back-EMF spikes generated when switching off inductive coils (like fuel injector solenoids). nec b58944 datasheet 2021
Returns real-time load conditions (open load, short circuit) back to the central processor to generate OBD-II diagnostic trouble codes (DTCs). 3. Key Operating Features Built-in Fault Protection
This article provides a deep-dive reference for the , compiling available technical data, pinout configurations, electrical characteristics, typical applications, and replacement strategies. Given that NEC no longer publishes original datasheets for this legacy component on its primary domain, this guide synthesizes information from archival sources, service manuals, and industry-standard testing data as of the 2021 timeframe.
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: Marked as "Tape & Reel" and "Lead-free/RoHS Compliant," showing that even decades-old designs had been updated to meet modern environmental standards. The Component’s Secret
: Automotive modules experience persistent vibration. Inspect the 28 pins under a microscope for cold solder joints or micro-fractures, common in older Mercedes or Bosch modules. If you are working on a specific repair, let me know:
If your repair or design absolutely requires the original NEC B58944, your best course of action in 2021 and beyond is to: High-current capacity with integrated flyback protection
The NEC B58944 is a type of N-channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) that is designed for high-speed switching applications. It is a highly efficient and reliable component that offers low on-resistance, high current capability, and excellent thermal performance. The B58944 is commonly used in power supplies, motor control circuits, and other high-frequency applications.
): Gates incoming data write-signals to memory cells when pulled low. Power Supply ( VCCcap V sub cap C cap C end-sub
: Used to select the specific memory location inside the 32K array. 11 to 13 I/O0 – I/O2
What or Bosch ECU part number you are servicing.
