Bluetooth 5.1 TxRx with an ARM Cortex-M3 core
The Texas Instruments CC2640R2FRHBT is a Bluetooth v5.1-compliant wireless MCU from the SimpleLink family, integrating a 2.4 GHz GFSK transceiver with a dedicated ARM Cortex-M3 application processor. The radio delivers a -97 dBm sensitivity and a 5 dBm output power, giving a link budget that supports reliable communication across a typical indoor range. Supply voltage spans 1.8 V to 3.8 V, suiting single-cell coin-cell or 3.3 V regulated rails.
The base product number is CC2640, so any future die revisions or package variants will carry a different suffix — keep an eye on the PCN stream if you are locked into the 32-VQFN footprint.
32-VQFN with exposed pad — layout checklist
The device is housed in a 32-VFQFN Exposed Pad package, supplier device package 32-VQFN (5x5 mm). Surface-mount assembly is standard, but the QFN's perimeter leads are fine-pitch; ensure the solder paste stencil aperture is sized for the 0.5 mm pitch to avoid bridging. Supply decoupling should follow the reference design: a 1 µF ceramic close to each VDD pin, plus a 10 µF bulk cap on the main rail.
Radio performance and current draw
The receiver draws 5.9 mA typical, and the transmitter at 5 dBm output pulls 9.1 mA. Those numbers are competitive for a BLE SoC and allow extended battery life in duty-cycled applications. The -97 dBm sensitivity is measured at 1 Mbps data rate; the maximum data rate is 2 Mbps (Bluetooth 5 LE Coded and 2M PHY), which trades range for throughput. Modulation is GFSK, standard for BLE.