| PartNumber | EM357-RTR | EM357-RT | EM357-RTB |
| Description | RF System on a Chip - SoC IEEE 802.15.4 2.4 GHz SoC | RF System on a Chip - SoC IEEE 802.15.4 2.4 GHz SoC | IC RF TXRX+MCU 802.15.4 48VFQFN |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | - |
| Product Category | RF System on a Chip - SoC | RF System on a Chip - SoC | - |
| RoHS | Y | Y | - |
| Type | Zigbee | Zigbee | - |
| Core | ARM Cortex M3 | ARM Cortex M3 | - |
| Operating Frequency | 2.4 GHz | 2.4 GHz | - |
| Maximum Data Rate | 5 Mb/s | 5 Mb/s | - |
| Output Power | 5 dBm | 5 dBm | - |
| Sensitivity | - 100 dBm | - 100 dBm | - |
| Operating Supply Voltage | 2.1 V to 3.6 V | 2.1 V to 3.6 V | - |
| Supply Current Receiving | 26 mA | 26 mA | - |
| Supply Current Transmitting | 31 mA | 31 mA | - |
| Program Memory Size | 192 kB | 192 kB | - |
| Package / Case | QFN-48 | QFN-48 | - |
| Packaging | Reel | Tray | - |
| Height | 1 mm | 1 mm | - |
| Length | 7 mm | 7 mm | - |
| Program Memory Type | Flash | Flash | - |
| Series | EM357 | EM357 | - |
| Width | 7 mm | 7 mm | - |
| Brand | Silicon Labs | Silicon Labs | - |
| Data RAM Size | 12 kB | 12 kB | - |
| Data RAM Type | RAM | RAM | - |
| Interface Type | I2C, JTAG, SPI, UART | I2C, JTAG, SPI, UART | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Number of I/Os | 24 I/O | 24 I/O | - |
| ADC Resolution | 14 bit | 14 bit | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Development Kit | EM357-DEV | EM357-DEV | - |
| Maximum Clock Frequency | 12 MHz | 12 MHz | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of Timers | 2 Timer | 2 Timer | - |
| Processor Series | EM357 | EM357 | - |
| Product Type | RF System on a Chip - SoC | RF System on a Chip - SoC | - |
| Factory Pack Quantity | 2000 | 416 | - |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | - |
| Tradename | Ember | Ember | - |