ADM2587EBRWZ收发器 IC, RS-485 TRANSCEIVER, 5.5V, SOIC-20; Device Type:Transceiver; IC Interface Type:RS485; No. of Drivers:1; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Driver Case Style:SOIC; No. of Pins:20; Operating Temperature Min:-40C ;RoHS Compliant: Yes http://www.chip100.com/