Nec B58944 Datasheet

Power supply overtemperature protection. 4. Electrical Characteristics and Design Considerations 4.1. Self-Heating Effect

: Measure resistance from VCC to Ground pins. A reading below several hundred ohms generally indicates a blown internal logic gate. Replacement and Soldering Guidelines

This IC is a "vulnerable" part, meaning it is one of the most common failure points in older or high-mileage vehicle computers. It is frequently found in a wide array of Bosch-manufactured ECUs for brands like , Iveco , and various European models. Specific ECU models that utilize the B58944 include: Bosch ME7.x series (e.g., ME7.4.4, ME7.5, ME7.9.6) Bosch EDC series (e.g., EDC7, EDC16) Repair and Procurement

256 Kibibits organized uniformly into a 32K x 8-bit architecture . nec b58944 datasheet

: Write Enable and Output Enable signals that regulate data flow timing to prevent collision on the ECU's internal bus. Primary Applications: Bosch EDC16 Repair

: Internal gates can lock into a permanent "High" or "Low" state, keeping critical components like fuel pumps or injection systems permanently engaged or entirely unresponsive. Component Replacement Sourcing

While specific revisions may vary, these are the standard parameters associated with the B58944 series: 40V to 60V (Standard for automotive 12V/24V systems) Continuous Drain Current ( IDcap I sub cap D ): Up to 50A - 80A (depending on ambient temperature) Static Drain-Source On-State Resistance ( Power supply overtemperature protection

If you are purchasing a replacement chip, be aware that many listings for the NEC B58944 describe it as an empty chip

Rth(j−c)cap R sub t h of open paren j minus c close paren end-sub

If the B58944 is unavailable, alternatives with similar B-values and 10k resistance include: B57164K0103J000 Vishay: NTCLE100E3103JB0 Semitec: 103AT-2 6. Conclusion Self-Heating Effect : Measure resistance from VCC to

: The vehicle cuts out when the engine bay reaches full operating temperature, pointing to internal IC thermal fracturing.

Always check the specific version of the component (e.g., suffix, tolerance) for precise datasheet values.

No publicly accessible datasheet for exists in major technical databases as of this report. The part is likely a custom or obsolete component intended for a specific application. Users are advised to trace the circuit, analyze the component’s markings in full, or contact Renesas support with the application context.

Usually TO-220 or TO-263 (D2PAK) for heat dissipation Logic Level: Designed for low gate-drive voltages Key Technical Specifications