B58944 Datasheet Hot [new] | Nec
Replacing a faulty NEC B58944 requires precise surface-mount handling to prevent peeling the underlying copper traces away from the multi-layer ECU board.
The specific pin functions vary significantly depending on which component the chip is acting as. Always verify the pinout based on its role within a specific ECU.
Based on its identification as a D43256 series chip, the standard parameters include: : Static RAM (SRAM). Memory Density : 256K bits (organized as 32,768 words × 8 bits). Access Time : 70 nanoseconds (indicated by the "-70" suffix).
This report is a general overview and might not cover all details and nuances of the NEC B58944 datasheet. For precise design and application, direct reference to the official datasheet and related technical documents from NEC (or equivalent) is strongly recommended. nec b58944 datasheet hot
The B58944 belongs to NEC’s (now Renesas Electronics) line of power components. In most applications, these are housed in TO-220 or similar power packages designed for heat dissipation. Because these parts are often used in high-current environments, they are prone to running "hot" if the surrounding circuitry fails or if the thermal paste has degraded. Key Specifications to Look For
A wide range of passenger and commercial vehicle platforms utilize this component across various generations of engine management hardware:
Match VCEO, IC, PD, and hFE at the same collector current. Also, match the package (TO-220, TO-3P, etc.) for heatsink compatibility. Replacing a faulty NEC B58944 requires precise surface-mount
There is no known off-the-shelf alternate part number promoted as a universal substitute for the proprietary B58944. The safest replacements are removing a chip from a donor ECU of the exact same type or sourcing a component that is explicitly listed as "B58944 D43256BGU-70Y".
When the B58944 is unavailable, technicians frequently use the $\mu$PD43256BGU-70L or -70Y as a direct drop-in replacement. B58944 - datasheet, pdf, info, parameters, stock - Elparts
Please keep in mind that generated papers may not be 100% accurate or reliable, I suggest you verify and fact-check any information provided. Based on its identification as a D43256 series
While exact specs can vary by manufacturer suffix, the general profile includes: PNP Silicon Transistor.
Multi-dimensional lookup offsets dictated by real-time knock-sensor inputs.
This chip is noted as an "easily damaged part" on ECU circuit boards; replacement is a common repair for engine computer failures.