ANALOG DEVICES LTC1535ISW#PBF Transceiver, RS422, RS485, 250 kbps, 1 Driver, 2 Receiver, 4.5 to 7.5 V, -40 to 85 °C, WSOIC-28

LTC®1535 is an isolated RS485 full-duplex differential line transceiver. Isolated RS485 is ideal for systems where the ground loop is broken to allow for much larger common mode voltage ranges. An internal capacitive isolation barrier provides 2500VRMS of isolation between the line transceiver and the logic level interface. The powered side contains a 420KHz push-pull converter to power the isolated RS485 transceiver. Internal full-duplex communication occurs through the capacitive isolation barrier. The driver and receiver feature three-state outputs, with the driver maintaining high impedance over the entire common mode range. The driver has short-circuit current limits in both directions and a slow slew rate select to minimize EMI or reflections. The 68kohm receiver input allows up to 128 node connections. Typical applications are isolated RS485 receiver/driver, RS485 with large common mode voltage, breaking RS485 ground loops, multiple unterminated line taps.

• UL rated isolated RS485: 2500VRMS, UL recognized® file #E151738
• Eliminates ground loops, 250kBd maximum data rate
• Self-powered with 420KHz converter
• Fail-safe output high for open or shorted receiver inputs
• Short-circuit current limit, slow slew rate control
• 68Kohm input impedance allows up to 128 nodes, thermal shutdown
• 8kV ESD protection on driver outputs and receiver inputs
• Supply range from 4.5 to 5.5V (VCC), 4.5 to 7.5V (VCC2) at TA=25°C. VCC=5V, VCC2=5V
• 28-lead plastic wide SO package
• Temperature rating range from �40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party