Nec B58944 Datasheet Free [portable] Jun 2026

SOP-28 (Small Outline Package, 28 pins) Category: Automotive Powertrain & IC Component Line

The search for the is a journey through the golden age of Japanese semiconductors. While this specific part is obscure and likely a custom OEM component, the document does exist somewhere—likely in a dusty service manual or on a retired engineer’s hard drive.

The NEC B58944 belongs to NEC's legacy lineup of discrete semiconductors or specialized integrated circuits (ICs). Depending on the specific prefix and package style (often related to the 2SB589 or similar Japanese Industrial Standard naming conventions), this device is engineered for high reliability, efficient thermal dissipation, and stable electrical characteristics under varied operating conditions. 2. Key Technical Specifications (Typical)

Replacement B58944 chips are typically sold "empty"—meaning they do not come with pre-loaded programs or data. nec b58944 datasheet Free

Below is a draft post for a technical forum or social media group to help others find or understand this component.

The search term "Free" adds unnecessary friction, as most component datasheets are legally free, but adding this keyword often funnels users into "pay-to-download" spam sites or questionable file-hosting lockers.

| Parameter | Symbol | Rating | Unit | | :--- | :---: | :---: | :---: | | Supply Voltage | $V_CC$ | 7.0 | V | | Output Voltage (Peak) | $V_OUT$ | 120 - 180 | V | | Operating Temperature | $T_opr$ | -20 to +70 | °C | | Storage Temperature | $T_stg$ | -40 to +125 | °C | SOP-28 (Small Outline Package, 28 pins) Category: Automotive

: Decodes which of the 32,768 memory addresses the ECU is targeting.

While official NEC/Renesas legacy datasheets can be elusive, technical parameters and PDF links are hosted on Elparts and Jotrin Electronics .

Built-in low-dropout (LDO) linear regulator logic, logic-level control gates, and comprehensive diagnostic feedback protections. 🎛️ Architecture and Key Specifications Depending on the specific prefix and package style

Built-in safeguards including thermal shutdown (over-temperature protection) , over-current limiting , and short-circuit isolation protect the underlying printed circuit board (PCB) tracks.

Be careful of fake components when sourcing parts for ECU repairs. You can buy original stock through automotive repair suppliers such as Inovauto ECU Drivers or hardware specialists like Evatron Comercial Eletronica . Always confirm the full marking suffix to verify it matches your board's speed and temperature specification. B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics