Nec B58944 Datasheet Link

NEC B58944 Datasheet: A Complete Guide to Specifications, Pinouts, and Applications

5. Typical Application Circuit

To integrate the B58944 into a custom PCB, follow this minimal design checklist:

1. Power Supply: Use a clean 3.3V regulator (LDO). Add decoupling capacitors (typically 10uF and 100nF) close to the module's VCC pins to smooth out RF transmission spikes.
2. Antenna: Some B58944 variants have an integrated ceramic antenna on the PCB. Others require an external antenna connected to an RF pad (U.FL connector or solder pad). Check the physical module for a "globe" icon.
   • If external: Maintain 50-ohm impedance trace.
3. UART Connection: Connect the module's TX to the MCU's RX and vice versa. Connect CTS/RTS if flow control is used (recommended for high-speed EDR modes).

C. Pin Configuration Diagram

• NEC often uses a top-view with pin 1 marked by a dot or notch.
• Example (TO-92 transistor): Emitter, Collector, Base (check datasheet – NEC sometimes differed from standard).

3. Hardware Architecture

The B58944 is a highly integrated SiP. Unlike a simple Bluetooth chip, the module includes: nec b58944 datasheet

1. RF Transceiver: Handles the 2.4GHz radio signal.
2. Baseband Controller: Manages the Bluetooth protocol stack link layer.
3. Clock Source: Integrated crystal oscillator (typically 26 MHz).
4. Shielding: Metal can shielding to prevent EMI and meet FCC/CE regulations.

Note: This module generally requires an external host microcontroller (MCU) to run the upper-layer stack (Profiles) or can be used in "cable replacement" modes depending on the firmware loaded. NEC B58944 Datasheet: A Complete Guide to Specifications,