Nec B58944 Datasheet -

Subject: Technical Specifications and Application Overview for the B58944 Transistor Component Type: High-Voltage, High-Speed Switching Power Transistor Manufacturer: NEC (now Renesas Electronics)

The NEC B58944 (often associated with the uPD version numbers like uPD72644) is a compact Bluetooth 2.0 + EDR (Enhanced Data Rate) module. It is designed as a "drop-in" RF solution, integrating the baseband controller, RF transceiver, and necessary passive components into a single shielded package. nec b58944 datasheet

This module is typically used in embedded systems requiring short-range wireless communication where the designer wants to avoid complex RF layout and certification processes. Power Management:

From forum posts and repair guides mentioning "NEC B58944," the component is frequently found in a SIP (Single Inline Package) or ZIP (Zig-zag Inline Package) with 5 to 9 pins. Examples include: GPIO: General Purpose I/O for status LEDs (Link/Active)

While specific pin pitch varies by board revision, the interface logic remains standard.

Primary Interfaces:

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