Date: 27/02/2011

Isolated half-duplex differential line transceiver with integrated transformer driver

Texas Instruments has introduced an isolated half-duplex differential line transceiver (Profibus RS-485) with integrated transformer driver. The ISO1176T provides the primary voltage for an isolation transformer and, in conjunction with an external transformer, rectifier and regulator, provides the smallest isolated signal and power system design with highest efficiency and lowest electromagnetic interference (EMI).

Applications include Profibus systems, factory and building automation, networked sensors, motor/motion control, HVAC, and networked security stations.

Key features and benefits of the ISO1176T:
TI's capacitive isolation technique uses SiO2 as isolation dielectric to increase reliability and lifetime by more than double that of magnetic or optical isolation techniques.
Provides 2500 Vrms of isolation between the line transceiver and logic-level interface to reduce risk of data corruption and damage to expensive control circuits over long transmission lines.
Integrates transformer driver in the transceiver.
Operates at 40 Mbps.
Supports 160 nodes, reducing the number of repeaters required and system cost.

Package: 16-pin SOIC package
Availability: Now, Two other isolated full-duplex RS-485 transceivers with transformer drivers, one operating at 5 V and other operating at 3.3 V, will be available by end of 1Q11.
Price: Each $3.30 in 1K pieces
For more details visit: www.ti.com