MAX220–MAX249 +5V-Powered, Multichannel RS-232 .
MAX230 - Multichannel RS-232 Drivers/Receivers
MAX2309 - CDMA IF VGAs and I/Q Demodulators
MAX2308 - CDMA IF VGAs and I/Q Demodulators
MAX2306 - CDMA IF VGAs and I/Q Demodulators