Unique MSOP   Isolators are    3 mm square

• Passive or Digital Inputs
• One or Two Channels
• CMOS or Open-Drain Outputs
• 150 Mbps (S-Series)
• 125°C (T-Series)
• Failsafe (IL600-Series)
• DC Correct (IL500-Series and IL600-Series)
• 2.3 kVrms Isolation (1 min.)
• IEC 61010-2001 Approved

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Single-Component RS-485 Receiver
Using IL610

By Sandy Templeton
Director, Isolator Product Development and Applications

An IL610 can be used as a simple isolated RS-485/RS-422 receiver. No external resistors are required, and cabling is greatly simplified by eliminating the need to power the input side of the receiving board:

The circuit is failsafe because the IL610 is guaranteed to switch to the high state when the coil input current is less than 500 µA. No current-limiting resistor is needed for a single receiver because it will draw less current than the driver maximum. Line termination resistors are not necessary in most IL610 line receiver applications below a data rate of about 10 Mbps because the IL610 coil resistance of approximately 70 Ohms is close to the characteristic impedance of most cables.

The IL610 provides 2.5 kVrms isolation (one minute) and 20 kV/µs transient immunity. Parts are available in 8-pin PDIP, SOIC, or NVE's unique IEC approved MSOP.

For more information on using IL600-Series Isolators as differential receivers, see Application Bulletin No. 10 (.pdf).

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