SN65C3221E, SN75C3221E SLLS694C – NOVEMBER 2005 .
SN65C3221E - 3-V to 5.5-V Single-channel RS-232 1-Mbits Line Driver/Receiver
SN65C3221E, SN75C3221E SLLS694C – NOVEMBER 2005 – REVISED JULY 2021 3-V to 5.5-V Single-channel RS-232 1-Mbits Line Driver and Receiver with ±15-kV IE.