Nec B58944 Datasheet ((better)) Jun 2026

Always buy from trusted electronics distributors to avoid counterfeit chips. Substandard or fake components cannot handle the severe voltage spikes and high temperatures of an active automotive engine bay. The specific stamped on your ECU casing.

: SOP-28 (Small Outline Package, 28 pins) or SO-28.

NEC’s semiconductor division merged with Renesas in 2010. Submit a part number inquiry through Renesas’s customer support portal. Provide photos of the component and any surrounding PCB markings. nec b58944 datasheet

While complete schematics for proprietary silicon are generally restricted to internal OEM engineering manuals, bench analysis reveals that the B58944 typically handles several foundational tasks within an Engine Control Module (ECM) or transmission control unit:

In automotive systems, it serves as temporary storage for real-time engine data, sensor readings, and diagnostic information. Critical Applications in Automotive Repair Always buy from trusted electronics distributors to avoid

Within these circuits, the B58944 acts as an intermediary component—either serving as a dedicated high-reliability buffer memory or driving localized output logic. Because it handles continuous read/write routines and coordinates localized processing data, it is a frequent point of electrical failure when an ECU undergoes an external short circuit or thermal overload. Common Failure Modes & Diagnostics

This information will help pinpoint whether the chip needs a direct hardware replacement or if your issue stems from a corrupt firmware file. Share public link : SOP-28 (Small Outline Package, 28 pins) or SO-28

The NEC B58944 is a high-performance amplifier IC that has been widely used in various electronic applications, including audio equipment, instrumentation, and communication systems. In this article, we will provide an in-depth review of the NEC B58944 datasheet, covering its features, specifications, and application areas.

The B58944 is engineered for the harsh electrical and thermal environments found under a vehicle's hood. It translates fragile microcontroller signals into the robust power currents required to operate engine actuators. Specification / Feature NEC Corporation / Renesas Electronics Package / Case SOP-28 (Small Outline Package, 28 Pins) Mounting Type Surface Mount Technology (SMT / SMD) Primary Function Automotive Engine ECU Driver IC Common Pairings Often found alongside D43256BGU-70Y SRAM chips Target Application Diesel & Gasoline Injection Module Management RoHS Status Lead-free / RoHS Compliant Primary Architectural Roles

The purpose of this report is to identify and describe the technical documentation (datasheet) for the NEC part number , presumed to be an electronic component manufactured by NEC Corporation (now part of Renesas Electronics). The report also explains how to locate the datasheet or find a replacement.

Efficient heat management is vital for the B58944 to prevent thermal runaway. Maximum 150°C to 175°C. Storage Temperature ( Tstgcap T sub s t g end-sub ): -55°C to +175°C. Thermal Resistance (