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Fault-protected transceiver suits motor-driver control systems

Posted: 18 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:RS-485 transceiver? fault protection? motor-driver control system?

Maxim Integrated Products has developed the MAX13448E 80V fault-protected, full-duplex RS-485 transceiver.

Capable of withstanding shorts up to 80V on the RS-485 interface pins, this device eliminates the need for external fault-protection circuitry, typically polyswitch limiters and zener diodes. The transceiver prevents data from being transmitted during a fault condition, and then resumes normal operation after the fault condition has been removed. This integrated fault protection is useful in architectures such as USB and CAN in which power and data are transmitted along the same cable. The MAX13448E is designed for industrial, HVAC, and motor-driver control systems.

In addition, the MAX13448E is slew-rate limited to reduce EMI and reflections on the data bus, allowing error-free data transmission at up to 500Kbps with a 5V supply, and 250Kbps with a 3.3V supply, in environments with high levels of radiated noise. Additionally, hot-swap capability eliminates false transitions on the bus during power-up or hot insertion. It offers 8kV ESD protection per the human body model.

The MAX13448E operates from a 3.3V to 5V supply. Fully specified over the -40C to +85C extended temperature range, it is available in a 14-pin SO package. Pricing starts at $2.20 (1,000-up, FOB USA).

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