Profibus RS-485/RS-422 Transceivers
19-3038; Rev 3; 5/12
MAX3465–MAX3469
+5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers
General Description...
Description
19-3038; Rev 3; 5/12
MAX3465–MAX3469
+5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers
General Description
The MAX3465–MAX3469 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 +2.1V minimum output level with a 54Ω load, 40Mbps data rate, and output skew less than 2ns. Each part 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 dela...
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