ST3232 3 TO 5.5V, LOW POWER, UP TO 400KBPS, RS-232.
ST3232 - RS-232 DRIVERS AND RECEIVERS
ST3232EB - RS-232 drivers/receivers
ST3232C - RS-232 drivers and receivers
PST3232 - CMOS System Reset
ST3232B - RS-232 drivers and receivers
ST3232EC - RS-232 drivers/receivers
ST3232E - RS-232 DRIVERS AND RECEIVERS