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| PartNumber | SI1021-A-GMR | SI1021-B-GM | SI1021-A-GM |
| Description | RF Microcontrollers - MCU | RF Microcontrollers - MCU | Microcontrollers - MCU RF Microcontrollers - MCU 64KB 8KB RAM PRGRM XCVR, DC-DC |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Labs |
| Product Category | RF Microcontrollers - MCU | RF Microcontrollers - MCU | RF Transceiver ICs |
| Shipping Restrictions | - | ||
| RoHS | Y | Y | - |
| Core | CIP-51 | CIP-51 | - |
| Operating Frequency | 240 MHz to 960 MHz | 240 MHz to 960 MHz | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Program Memory Size | 64 kB | 64 kB | - |
| Data RAM Size | 8448 B | 8448 B | - |
| Maximum Clock Frequency | 24.5 MHz | 24.5 MHz | - |
| ADC Resolution | 10 bit, 12 bit | 10 bit, 12 bit | - |
| Operating Supply Voltage | 1.8 V to 3.8 V | 1.8 V to 3.8 V | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Package / Case | LGA-85 | LGA-85 | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Packaging | Tray | Reel | Tray |
| Program Memory Type | Flash | Flash | - |
| Series | Si1021 | Si1021 | - |
| Brand | Silicon Labs | Silicon Labs | - |
| Data RAM Type | SRAM | SRAM | - |
| Interface Type | SPI, UART | SPI, UART | - |
| Number of I/Os | 53 I/O | 53 I/O | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 16 Channel | 16 Channel | - |
| Number of Timers | 4 Timer | 4 Timer | - |
| Processor Series | Si1021 | Si1021 | - |
| Product Type | RF Microcontrollers - MCU | RF Microcontrollers - MCU | - |
| Factory Pack Quantity | 2500 | 43 | - |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | - |
| Supply Voltage Max | 3.8 V | 3.8 V | - |
| Supply Voltage Min | 1.8 V | 1.8 V | - |
| Type | - | - | TxRx + MCU |
| Package Case | - | - | 85-VFLGA Exposed Pad |
| Frequency | - | - | 240MHz ~ 960MHz |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Sensitivity | - | - | -121dBm |
| Voltage Supply | - | - | 1.8 V ~ 3.8 V |
| Memory Size | - | - | 64kB Flash, 8.5kB RAM |
| Protocol | - | - | EZRadioPro |
| Data Rate Max | - | - | 256kbps |
| Serial Interfaces | - | - | I2C, SPI, UART |
| Power Output | - | - | 20dBm (Max) |
| Current Receiving | - | - | 18.5mA |
| RF Family Standard | - | - | General ISM |
| Modulation | - | - | FSK, GFSK, OOK |
| GPIO | - | - | 53 |
| Current Transmitting | - | - | 85mA |