Nec B58944 Datasheet May 2026
The NEC B58944 is a specialized integrated circuit (IC) widely recognized within the automotive electronics industry as a core memory component for engine control units (ECUs). Manufactured by NEC (now part of Renesas), this chip is most commonly found in high-performance Bosch ECUs used by major vehicle manufacturers like Honda, Volvo, and Iveco. Core Technical Profile
These are the "breaking points." Operating the transistor above these values (like VCEOcap V sub cap C cap E cap O end-sub Tstgcap T sub s t g end-sub nec b58944 datasheet
- Add series resistors for inductive loads, flyback diodes for relays/solenoids, and TVS diodes for transient suppression on supply lines.
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) | The NEC B58944 is a specialized integrated circuit
A. Absolute Maximum Ratings (Never Exceed)
| Parameter | Symbol | Typical NEC Value | Meaning | | :--- | :--- | :--- | :--- | | Supply Voltage | VCC | e.g., 7V | Max voltage before damage | | Power Dissipation | PD | e.g., 500mW | Use heatsink if exceeded | | Junction Temp | Tj | 150°C | Max internal temp | Add series resistors for inductive loads, flyback diodes
If the B58944 is a switching regulator (e.g., similar to NEC µPC494 PWM controller), then specifications would differ drastically – switching frequency ~40kHz, output current up to 3A external transistor.
Report generated for informational purposes. Always verify component identities with original manufacturer documentation when available.
