Nec B58944 Datasheet Jun 2026

: Typically +5V DC (+/- 10%) for automotive logic systems. Absolute Maximum Ratings

While a dedicated, single datasheet for the "B58944" itself is not available, the component is well-documented under its primary part number, the series. You can use this information to find the relevant documentation. Here are the core specifications you would find in its datasheet:

Always use 3.3V logic levels. Do not connect directly to 5V MCUs without a logic level shifter, as this will damage the module.

Actively used across Honda passenger cars, Iveco heavy machinery, and Chevrolet/GM platform variants. Understanding Failures and ECU Repair Workflows nec b58944 datasheet

| Parameter | Symbol | Typical Value | Unit | Test Conditions | | :--- | :---: | :---: | :---: | :--- | | Turn-on Time | $t_on$ | 0.7 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ | | Storage Time | $t_stg$ | 4.0 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ | | Fall Time | $t_f$ | 0.4 | $\mu s$ | $I_C = 4A, I_B1 = 0.8A$ |

Connected to the load; the metal tab is also internally connected to the drain for cooling.

| Parameter | Specification | | :--- | :--- | | | 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) | : Typically +5V DC (+/- 10%) for automotive logic systems

Despite its industrial ruggedization, the B58944 is classified by technicians as a on automotive circuit boards. Because it handles volatile temporary data constantly, it is highly susceptible to external electrical stresses. Primary Causes of Component Failure

This component is widely utilized inside to handle critical, real-time computational data processing. This comprehensive deep-dive covers its architectural structure, core technical specifications, package parameters, and common troubleshooting use-cases found in automotive module repair. Core Overview and Architecture

The single most common use-case for sourcing the NEC B58944 is the refurbishment of . Here are the core specifications you would find

: It switches the high-current grounding path for fuel injectors, idle air control valves, and emissions solenoids.

: Align the new chip's pins with the pads. Tack down one corner pin. Solder the rest using a fine-tip iron. Perform a visual inspection under magnification to ensure there are no solder bridges or bad joints.

system rail standard in classic Bosch automotive electronics. Key Technical Parameters