Black Box Universal RS-232<->RS-422/485 Converter with Opto-Isolation - serial adapter - RS-232 - RS-422/485 - IC821A - Transceiver Modules - CDW.com
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ISL83490: 3.3V, Full Duplex, 10Mbps, RS-485/RS-422 Transceiver _ BDTIC a Leading Distributor in China
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MAX3292 RS-485/RS-422 Transceivers with Preemphasis for High-Speed, Long-Distance Communication | Analog Devices
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