The MAX3460-MAX3464 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 output level with a 54Ω load, 20Mbps 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 delays are guaranteed under 20ns for multidrop, clock distribution applications. Drivers are short-circuit current limited and are 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 together externally to serve as a direction control.
Key Features
Applications/Uses
Recommended for Profibus Applications
Guaranteed 20Mbps Data Rate
20ns Transmitter and Receiver Propagation Delay
2ns Transmitter and Receiver Skew
High Differential Driver Output Level (2.1V on 54Ω )
Hot-Swap Versions
1µA Shutdown Supply Current
Low Supply Current Requirements (2.5mA typ)
Allow Up to 128 Transceivers on the Bus
True Fail-Safe Receiver while Maintaining EIA/TIA-485 Compatibility
Designed for Multipoint Transmissions on Long or Noisy Bus Lines
Full Duplex and Half Duplex Versions Available
Phase Controls to Correct for Twisted-Pair Reversal for 14-Pin Versions
Current-Limiting and Thermal Shutdown for Driver Overload Protection
High-Speed RS-422 Communications
High-Speed RS-485 Communications
Industrial Control Local Area Networks
Level Translators
Profibus Applications
Key Specifications:
RS-422/485 Line Driver/Receivers
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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