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Texas Instruments CC2640F128RSMT — RF & Wireless ICs
Texas Instruments

CC2640F128RSMT Bluetooth 5.1 MCU, 128kB Flash, -97dBm

MPNCC2640F128RSMT
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Texas Instruments SimpleLink CC2640F128RSMT, Bluetooth v5.1 TxRx + MCU, 2.4GHz, 128kB Flash, 28kB SRAM, -97dBm sensitivity, 5dBm output, 10 GPIO, 32-VQFN (4x4), -40 to 85°C.

$7.7500Ref. price · indicative, final on quote
CC2640F128RSMT datasheet
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Specifications

CC2640F128RSMT Technical Specifications
ParameterValue
TypeTxRx + MCU
SeriesSimpleLink™
Mounting typeSurface Mount
RF familyBluetooth
Voltage1.8V ~ 3.8V
Current - receiving5.9mA ~ 6.1mA
Current - transmitting6.1mA ~ 9.1mA
Power - output5dBm
Frequency2.4GHz
ProtocolBluetooth v5.1
InterfaceI2C, I2S, JTAG, SPI, UART
Operating temperature-40°C ~ 85°C
GPIO10
PackageTape & Reel (TR) Cut Tape (CT)
ModulationDSSS, O-QPSK, GFSK
Memory size128kB Flash, 28kB SRAM
Sensitivity-97dBm
Case32-VFQFN Exposed Pad
Data rate1Mbps

Product details

Bluetooth v5.1 wireless MCU with 128 kB Flash

The Texas Instruments CC2640F128RSMT is a SimpleLink wireless microcontroller integrating a Bluetooth v5.1-compliant radio with an ARM Cortex-M3 core. It carries 128 kB of Flash and 28 kB of SRAM, enough for a BLE application profile plus an OTA update staging buffer. The receiver hits -97 dBm sensitivity, and the transmitter delivers up to 5 dBm output power — a combination that gives a clean link budget for battery-powered sensors and beacons operating in the 2.4 GHz band.

Supply range and current draw — battery design fit

The supply range spans 1.8 V to 3.8 V, so a single CR2032 coin cell or a Li-Po can power it without a boost regulator. Receive current sits between 5.9 mA and 6.1 mA; transmit current runs 6.1 mA to 9.1 mA depending on output power setting. Those numbers are typical for a BLE SoC in this class and leave headroom for the sensor and interface loads on the same rail.

10 GPIOs and serial interface set

Ten GPIOs are available, multiplexed with I2C, I2S, JTAG, SPI, and UART interfaces. That is enough for a typical BLE sensor node — one I2C for an IMU or environmental sensor, one UART for a debug or host link, and a few remaining pins for button, LED, and interrupt lines.

Frequently asked questions

What is the difference between CC2640F128RSMT and CC2640R2F?

The CC2640R2F is a later-generation device that supports Bluetooth 5.2 features such as LE Audio and extended advertising, whereas the CC2640F128RSMT is Bluetooth v5.1. Both share the same 32-VQFN footprint and 128 kB Flash / 28 kB SRAM memory map, but the R2F adds the higher protocol version and some RF performance tweaks. Pin compatibility is not guaranteed without checking the respective datasheet pin maps.

Can CC2640F128RSMT support Bluetooth 5.2 features?

No. The CC2640F128RSMT is specified for Bluetooth v5.1. It does not support Bluetooth 5.2 features such as LE Audio, LE Power Control, or Extended Advertising sets. For Bluetooth 5.2 capability, the CC2640R2F or a newer SimpleLink device would be the appropriate choice.