SN65C3221, SN75C3221 SLLS351F – APRIL 2002 – R.
SN65C3221E - 3-V to 5.5-V Single-channel RS-232 1-Mbits Line Driver/Receiver
SN65C3221-Q1 - 3-V to 5.5-V Single-Channel RS-232 Compatible Line Driver/Receiver
SN65C3221 - 3-V to 5.5-V Single-Channel RS-232 Compatible Line Driver/Receiver