The SI4200-GM from Silicon Labs is a transceiver-only cellular Radio Frequency Integrated Circuit for GSM and GPRS at 850 MHz, 900 MHz, 1.8 GHz and 1.9 GHz, in a 32-VFQFN exposed pad package.
The SI4200-BM from Silicon Labs is a transceiver-only cellular Radio Frequency Integrated Circuit for GSM and GPRS at 850 MHz, 900 MHz, 1.8 GHz and 1.9 GHz, in a 32-VFQFN exposed pad package.