www.ti.com TRSF3221 3-V TO 5.5-V SINGLE-CHANNEL R.
TRSF3221 - 3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER
TRSF3221E - 3-V to 5.5-V Single-Channel RS-232 1-Mbit Line Driver/Receiver