Features

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-V PK 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

Applications

Security Systems

Chemical Production

Factory Automation

Motor and Motion Control

HVAC and Building Automation Networks

Networked Security Stations

Description

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.