Nec B58944 Datasheet Hot !!hot!! Jun 2026
on ECU circuit boards, making it a common target for replacement when a vehicle's engine computer fails.
The datasheet may provide guidance on how to use the NEC B58944 in various circuits, thermal considerations, and methods for protecting the device from electrical overstress.
256 Kilobits (Kib), typically organized as 32K x 8 bits. Package Type: SO-28 (Small Outline 28-pin) or SOP28 .
NEC B58944 is an integrated circuit (IC) that functions as a 256 Kbit (32K x 8) Parallel SRAM . It is an equivalent part to the $\mu$PD43256BGU-70L Key Specifications Manufacturer: NEC Electronics (now Renesas). Static RAM (SRAM). 256 Kib (32,768 words × 8 bits). SO-28 (Small Outline, 28-pin). Equivalents: $\mu$PD43256BGU-70L. Jotrin Electronics Datasheet Resources nec b58944 datasheet hot
The NEC B58944 is a critical component for engine control. In a typical ECU, which contains a main microcontroller (like a Motorola MPC5xx series, e.g., MZP665), the NEC B58944 serves as external SRAM. This fast, temporary memory stores real-time engine data for tasks like fuel injection timing and boost control, backed by EEPROM for permanent data like immobilizer codes. It is commonly found alongside the main processor in many ECU models:
The NEC B58944 datasheet provides valuable information about the component's technical specifications, operating conditions, and performance. This paper highlights the significance of datasheet analysis and its importance in the electronics industry. By understanding the datasheet, engineers and designers can optimize their designs, ensure component compatibility, and troubleshoot issues effectively.
Q: What is the maximum drain current of the NEC B58944? A: The maximum drain current of the NEC B58944 is 80A. on ECU circuit boards, making it a common
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The memory corrupts, causing erratic fueling or ignition timing.
In automotive electronics, the B58944 acts as an responsible for driving specific ECU functions or serving as a high-speed data buffer. It is often sold as an "empty" chip, meaning it does not contain pre-programmed software and must be integrated into a functional circuit board to operate. Overheating ("Hot") & Failure Troubleshooting Package Type: SO-28 (Small Outline 28-pin) or SOP28
This specific part is a "hot" item in the secondary market because it is often discontinued (obsolete), making original NEC stock highly valuable for authentic restorations. Interpreting the Datasheet
Look for signs of water damage, corrosion, or burnt marks on the 28-pin SOP package.
