3-V to 5-V Multichannel RS-232 Compatible Line Driver/Receiver 20-SOIC 0 to 70
Texas Instruments
Texas Instruments - SN75C3223DBRE4
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Texas Instruments - SN75C3223DWRE4
Texas Instruments - SN75C3223DBRG4
Texas Instruments - SN75C3223PWRE4