The SI1025-B-GM3 is a TxRx + MCU type RF Transceiver IC designed by Silicon Labs. It is part of the EZRadioPro protocol and operates at a frequency range of 240MHz ~ 960MHz. The memory size is 64kB Flash, 8.5kB RAM. The power output is 13dBm (Max) and sensitivity is -121dBm. The data rate (Max) is 256kbps and the current receiving is 18.5mA. The RF family/standard is General ISM < 1GHz and the modulation is FSK, GFSK, OOK. The serial interfaces are I2C, SPI, UART and the GPIO is 53. The current transmitting is 17mA ~ 30mA and voltage supply is 1.8V ~ 3.8V. The package/case is an 85-VFLGA Exposed Pad and the supplier device package is an 85-LGA (6x8). The temperature range - operating is -40°C ~ 85°C and the ECCN is 5A992C. The MSL Level is 3 (168 Hours) and the HTSUS is 8542.31.0001. The IC is not for new designs.