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| PartNumber | BGM121A256V2 | BGM121A256V1 | BGM121A256V1R |
| Description | Bluetooth Modules (802.15.1) Bluetooth ultra-small SIP module with ARM Cortex-M4 | Bluetooth Modules (802.15.1) | Bluetooth Modules (802.15.1) |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | Bluetooth Modules (802.15.1) | Bluetooth Modules (802.15.1) | Bluetooth Modules (802.15.1) |
| RoHS | Y | Y | Y |
| Class | Bluetooth Low Energy (BLE) | Bluetooth Low Energy (BLE) | Bluetooth Low Energy (BLE) |
| Protocol | Bluetooth 4.2 | Bluetooth 4.2 | Bluetooth 4.2 |
| Data Rate | 1 Mb/s | 1 Mb/s | 1 Mb/s |
| Operating Supply Voltage | 1.85 V to 3.8 V | 1.85 V to 3.8 V | 1.85 V to 3.8 V |
| Output Power | 8 dBm | 8 dBm | 8 dBm |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Sensitivity | - 90 dBm | - 90 dBm | - 90 dBm |
| Modulation Technique | GFSK | GFSK | GFSK |
| Interface Type | GPIO, I2C, SPI, UART, USART | GPIO, I2C, SPI, UART, USART | GPIO, I2C, SPI, UART, USART |
| Series | BGM121 | BGM121 | BGM121 |
| Antenna | Chip | Chip | Chip |
| Dimensions | 6.5 mm x 6.5 mm x 1.4 mm | 6.5 mm x 6.5 mm x 1.4 mm | 6.5 mm x 6.5 mm x 1.4 mm |
| Features | Integrated DC-DC Converter, Onboard Bluetooth Stack | Integrated DC-DC Converter, Onboard Bluetooth Stack | Integrated DC-DC Converter, Onboard Bluetooth Stack |
| Frequency | 2.4 GHz | 2.4 GHz | 2.4 GHz |
| Frequency Range | 2.4 GHz to 2.4835 GHz | 2.4 GHz to 2.4835 GHz | 2.4 GHz to 2.4835 GHz |
| Height | 1.4 mm | 1.4 mm | 1.4 mm |
| Length | 6.5 mm | 6.5 mm | 6.5 mm |
| Memory Size | 256 kB | 256 kB | 256 kB |
| Range | 200 m | 200 m | 200 m |
| Shielding | Shielded | Shielded | Shielded |
| Type | USB Adapter | USB Adapter | USB Adapter |
| Width | 6.5 mm | 6.5 mm | 6.5 mm |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Antenna Connector Type | Integrated | Integrated | Integrated |
| Core | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 |
| Moisture Sensitive | Yes | Yes | - |
| Product Type | Bluetooth Modules | Bluetooth Modules | Bluetooth Modules |
| Factory Pack Quantity | 260 | - | 1000 |
| Subcategory | Wireless & RF Modules | Wireless & RF Modules | Wireless & RF Modules |
| Supply Current Receiving | 8.7 mA | 8.7 mA | 8.7 mA |
| Supply Current Transmitting | 8.2 mA | 8.2 mA | 8.2 mA |
| Version | Bluetooth 4.2 | Bluetooth 4.2 | Bluetooth 4.2 |
| Unit Weight | 0.007055 oz | 0.007055 oz | - |
| Packaging | - | - | Reel |