| Part Number | CC2541F128RHAR | CC2531F128RHAR | 
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | 
| Category | RF Transceiver ICs | RF Transceiver ICs | 
|   |   | |
| Product Status | Active | Active | 
| Type | TxRx + MCU | TxRx + MCU | 
| RF Family/Standard | Bluetooth | 802.15.4 | 
| Protocol | Bluetooth v5.0 | Zigbee® | 
| Modulation | GFSK, MSK | - | 
| Frequency | 2.4GHz | 2.4GHz | 
| Data Rate (Max) | 2Mbps | 250kbps | 
| Power - Output | 0dBm | 4.5dBm | 
| Sensitivity | -99dBm | -97dBm | 
| Memory Size | 128kB Flash, 8kB RAM | 128kB Flash, 8kB RAM | 
| Serial Interfaces | I²C, SPI, USART | SPI, USART, USB | 
| GPIO | 23 | 21 | 
| Voltage - Supply | 2V ~ 3.6V | 2V ~ 3.6V | 
| Current - Receiving | 17.9mA ~ 20.2mA | 20.5mA ~ 24.3mA | 
| Current - Transmitting | 16.8mA ~ 18.2mA | 28.7mA ~ 33.5mA | 
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 
| Supplier Device Package | 40-VQFN (6x6) | 40-VQFN (6x6) |