MAX220–MAX249 +5V-Powered, Multichannel RS-232 .
MAX233 - Multichannel RS-232 Drivers/Receivers
MAX233A - (MAX220 - MAX249) +5V-Powered / Multichannel RS-232 Drivers/Receivers
MAX2338 - Triple/Dual-Mode CDMA LNA/Mixers
MAX2335 - 450MHz CDMA/OFDM LNA/Mixer