Nec B58944 Datasheet

The NEC B58944 is a specialized Integrated Circuit (IC) primarily used in automotive Engine Control Units (ECUs), specifically for BOSCH engine computer systems. It is often identified alongside the part number D43256BGU-70Y, which designates it as a specific type of high-speed CMOS static RAM chip frequently adapted for automotive driver applications. Technical Summary

Case 1 – Likely a Linear Regulator

Probe the PCB:

2. Key Specifications

| Parameter | Specification | | :--- | :--- | | Core Technology | Bluetooth v2.0 + EDR (Enhanced Data Rate) | | Frequency Range | 2.4 GHz ISM Band (2400 – 2483.5 MHz) | | Interface | UART / HCI (Host Controller Interface) | | Modulation | GFSK (Basic Rate), π/4-DQPSK & 8DPSK (EDR) | | Max Data Rate | Up to 3 Mbps (EDR) | | Operating Voltage | 3.3V (Typical) | | Sensitivity | Typically -85 dBm to -90 dBm | | Transmit Power | Class 2 (typical +4 dBm) or Class 1 with external PA support | | Operating Temp | -20°C to +70°C (Standard Commercial) | nec b58944 datasheet

💡 Warning: If you are buying this for an ECU repair, these chips are often sold "empty" (without pre-programmed data) if they are being used as generic RAM, but always verify if your specific ECU application requires a programmed version. The NEC B58944 is a specialized Integrated Circuit

1. Identify what the B58944 might actually be (based on common mislabeling).
2. Provide a universal methodology for reading any NEC datasheet once you find the correct part number.

If you can share a photo of the component marking or tell me what device it came from (make/model of the equipment), I may be able to identify a cross-reference or actual datasheet. Identify what the B58944 might actually be (based

1. Horizontal Deflection Output: Used in CRT (Cathode Ray Tube) HDTV monitors and televisions to drive the deflection yoke.
2. Switching Power Supplies: Suitable for high-voltage SMPS (Switched-Mode Power Supply) designs requiring 800V+ robustness.
3. General Purpose High-Voltage Switching: Drivers for motors, solenoids, or transformers requiring high breakdown voltage.