Maxim- 5V, Fail-safe, 40Mbps, Profibus RS-485/RS-422 Transceivers


November 3, 2003-Maxim Integrated Products introduces the MAX3465-MAX3469, fail-safe, 40Mbps Profibus transceivers. These devices are high-speed, differential-bus transceivers for RS-485 and RS-422 communications. They are designed to meet TIA/EIA-422-B, TIA/EIA-485-A, V.11, and X.27 standards. The transceiver complies with the Profibus specification, providing an output level greater than 2.1V with a 54 load, up to a 40Mbps data rate, and an output skew of less than 2ns. Each device contains one, three-state differential line driver and one differential-input line receiver. The devices operate from a 5V supply and feature true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This enables all receiver outputs on a terminated bus to output logic highs when all transmitters are disabled.

All devices feature a 1/4 standard unit-load receiver-input impedance that allows 128 transceivers on the bus. Driver and receiver propagation delays are guaranteed under 20ns for multidrop, clock distribution applications. The drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry. The driver and receiver feature active-high and active-low enables, respectively, that can be connected externally to serve as a direction control.

The MAX3465-MAX3469 are available in the commercial and extended temperature ranges in the narrow 8-pin SO and 8-pin PDIP packages (MAX3465/MAX3166) and the narrow 14-pin SO and 14-pin PDIP packages (MAX3467/MAX3468/MAX3469). Prices start at $1.42 (1000-up, FOB USA).

Additional Information:
QuickView Data Sheet
Full Data Sheet (PDF)

China PCB Prototype and Fabrication Manufacturer

You may have to register before you can post comments and get full access to forum.
User Name