Nec B58944 Datasheet Best Jun 2026
In these ECUs, the microcontroller (like an MPC56x series from NXP) needs fast, temporary storage for complex calculations. The onboard flash memory is too slow for real-time data, so the B58944 SRAM is used to provide the necessary speed and capacity for volatile data and program variables.
If you cannot find the exact "NEC B58944", you can search for other numbers that appear on the chip.
The SOP-28 package utilizes a dual-in-line layout with 14 pins on each side, optimized for automated pick-and-place assembly lines. nec b58944 datasheet
: Random loss of vehicle map configurations or immoblizer data syncing. Bench Testing Protocol
Q: What is the maximum drain-source voltage of the NEC B58944? A: The maximum drain-source voltage (VDS) of the NEC B58944 is 100V. In these ECUs, the microcontroller (like an MPC56x
Because it acts as a power driver, the B58944 handles significant current load and is one of the most frequently damaged parts on an automotive controller board. Common Symptoms of Failure
If an official NEC B58944 datasheet existed, it would contain: The SOP-28 package utilizes a dual-in-line layout with
The B58944 is housed in a standard surface-mount package tailored for high-vibration and space-constrained environments:
For automotive technicians and electronics enthusiasts, this chip represents a common point of failure that can lead to frustrating issues like OBD communication loss. However, thanks to its well-documented nature and continued availability from automotive part specialists, repairing a failed B58944 is a feasible task. Whether you are sourcing a replacement for a repair or looking for the technical data to understand your ECU, this guide serves as a definitive reference for the role, specifications, and datasheet of the NEC B58944.
Stalling, non-starting, or intermittent sensor errors can sometimes be traced back to a damaged B58944 chip. ECU Board Repair:
This article provides information for educational purposes. Working on automotive ECUs requires specialist knowledge and tools; always consult a professional if in doubt.