ISO485P ISO485 P IC Isolated RS485 Diff Bus Transceiver
Manufacturer: Burr Brown
Part Number: ISO485P
Number Leads/Terminals: 12
90 available for immediate delivery
Additional InformationIsolated RS-485 Differential Bus Transceiver
-- RS-485 AND RS-422 COMPATIBLE
-- RATED 1500Vrms
-- SINGLE-WIDE 24-PIN PLASTIC DIP
-- EASY TO USE LOW POWER: 180mW typ at 5Mbit/s
The ISO485 differential isolated bus transceiver uses Burr-Brown's capacitively coupled isolation technology to provide high-speed low cost bus isolation. The ISO485 is designed for bi-directional data communication on multipoint bus transmission lines and meets EIA Standard RS-485 as well as EIA Standard RS-422A requirements.
The ISO485 uses high voltage 0.4pF capacitors instead of the LED and photodetector which are used in equivalent optocoupler solutions. As a consequence the part count of the isolated RS-485 channel is reduced from multiple optocoupler channels an RS485 transceiver chip and supporting circuitry to one ISO485. The capacitors in the ISO485 provide a high voltage barrier 1500Vrms and greatly reduce current spikes on the power line.
The ISO485 combines a 3-state differential line driver and a differential-input line receiver both of which operate from a single 5V power supply. The driver differential outputs and the receiver differential input/ output bus ports are designed to offer minimum loading to the bus whenever the driver is disabled or VS = 0V.