CC2541F256TRHARQ1

The CC2541F256TRHARQ1 is a Texas Instruments Bluetooth Low Energy (BLE) System-on-Chip (SoC) in the CC254x family. It combines a 2.4 GHz BLE radio with an 8051-compatible MCU, 256 KB of flash, and 8 KB of RAM, all in a single chip. It runs from 1.8–3.6 V and includes a full BLE transceiver, plus a broad peripheral set and development tools.
Key features
- BLE 4.0-compliant radio with integrated MAC/stack support
- 256 KB flash, 8 KB RAM
- 8051-compatible MCU core
- Peripherals: GPIOs, UART, SPI, I2C, ADC, timers, PWM
- Low-power modes for battery-powered devices
- Supported by TI development tools (SmartRF Studio, BLE Stack, IDEs)
Typical use cases
- Beacons, wearables, wireless sensors, remote controls, and other compact, low-power BLE devices
Note
- The TRHARQ1 suffix denotes a specific package/variant in TI’s product catalog (e.g., tape-and-reel/temperature/package option).

Here are the key features of CC2541F256TRHARQ1:
- Bluetooth Low Energy (BLE) 4.0 single-chip SoC (2.4 GHz RF transceiver, 1 Mbps PHY)
- 8051-based microcontroller core
- On-chip memory: 256 KB flash, 8 KB RAM (code + data)
- Hardware AES-128 cryptography engine for security
- Peripherals: UART, SPI, I2C (TWI), GPIOs, ADC, PWM, multiple timers
- Power management: supports low-power modes with 1.8–3.6 V operation
- Integrated RF front-end with passive matching network
- Ready for TI BLE Stack and development tools (e.g., SmartRF/IDE support)
- Small footprint packaging suitable for embedded BLE devices (TR/HARQ1 variant)
- Suitable for wireless sensor networks, beacons, and handheld peripherals
Note: exact RAM and packaging details can vary by revision; the above reflects typical CC2541F256 features.

Pin count: 40 pins (QFN-40 package).
Function: TI CC2541 BLE System-on-Chip (2.4 GHz Bluetooth Low Energy transceiver + microcontroller) for Bluetooth LE devices.

- Manufacturer: Texas Instruments (TI).
- About the company: TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits, microcontrollers, wireless connectivity solutions, and other semiconductor components for a wide range of electronics.

CC2541F256TRHARQ1 is TI’s Bluetooth Low Energy (BLE) SoC with an integrated MCU and 256 KB flash, optimized for battery-powered wireless devices. Common application areas include:
- BLE sensors and actuators (environmental, motion, health)
- Beacons and proximity devices (retail, asset tracking)
- Wearables and health/fitness gadgets
- Smart home/building automation (lighting, HVAC, remotes)
- Industrial sensing and telemetry (machine monitoring, inventory)
- Wireless peripherals (keyboards, mice, game controllers)
- Data loggers and environmental monitoring prototypes
It targets low-power, short-range BLE communications in consumer, industrial, and healthcare IoT.

The CC2541F256TRHARQ1 uses a 28-pin QFN package (5x5 mm), RoHS-compliant, in Tape & Reel packaging.