• Meets or Exceeds TIA/EIA RS-485 Requirements
• 1/8 Unit Load – Up to 256 Nodes on a Bus
• Signaling Rates up to 1 Mbps
• Thermal Shutdown Protection
• Low Bus Capacitance – 16 pF (Typical)
• 50 kV/μs Typical Transient Immunity
• Fail-safe Receiver for Bus Open, Short, Idle
• 3.3-V Inputs are 5-V Tolerant
• Safety and Regulatory Approvals
  • 4000-VPK VIOTM, 560-VPK VIORM per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 and DIN EN 61010-1
  • 2500 VRMS Isolation Rating per UL 1577
  • 2500 VRMS Isolation Rating per CSA CA5A and IEC 60950-1

• Security Systems
• Chemical Production
• Factory Automation
• Motor and Motion Control
• HVAC and Building Automation Networks
• Networked Security Stations

The ISO15 is an isolated half-duplex differential line transceiver while the ISO35 is an isolated full-duplex differential line driver and receiver for TIA/EIA 485/422 applications. The ISO15M and ISO35M have extended ambient temperature ratings of –55°C to 125°C while the ISO15 and ISO35 are specified over –40°C to 85°C.

These devices are ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical barrier of the device is tested to provide isolatlion of 4000 VPK per VDE and 2500 VRMS per UL and CSA between the bus-line transceiver and the logic-level interface.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or nearby sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits.