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| Part Number | BT121-A-V2 | BT121-A-V2C | BT121-A-V1 |
|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Status | Active | Active | Discontinued at Digi-Key |
| RF Family/Standard | Bluetooth | - | Bluetooth |
| Protocol | Bluetooth v4.2 | - | Bluetooth v4.1 |
| Modulation | - | - | - |
| Frequency | 2.4GHz | - | 2.4GHz |
| Data Rate | 3Mbps | - | 1Mbps |
| Power - Output | 12dBm | - | 14dBm |
| Sensitivity | -96dBm | - | -96dBm |
| Serial Interfaces | I²C, SPI, UART | - | I²C, SPI, UART |
| Antenna Type | Integrated, Chip | - | Integrated, Chip |
| Utilized IC / Part | - | - | - |
| Memory Size | 128kB Flash, 16kB RAM | - | 128kB Flash, 16kB RAM |
| Voltage - Supply | 2.2V ~ 3.6V | - | 2.2V ~ 3.6V |
| Current - Receiving | 38.7mA | - | - |
| Current - Transmitting | 92mA | - | 85mA ~ 92mA |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C | - | -40°C ~ 85°C |
| Package / Case | 41-SMD Module | 41-SMD Module | 41-SMD Module |
