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+5V, Fail-Safe, 40Mbps, PROFIBUS RS-485/RS-422 Transceivers

5V, Fail-Safe, 40Mbps PROFIBUS RS-485/RS-422 Transceivers

Product Details

Key Features

Applications/Uses

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Half
VSUPPLY (V) 5
Data Rate (kbps) (min) 30000
ICC (mA) (typ) 2.5
Tx EN Yes
Rx EN Yes
ICC (Shutdn.) (µA) (typ) 1
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.47
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Simplified Block Diagram

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Parameters

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Half
VSUPPLY (V) 5
Data Rate (kbps) (min) 30000
ICC (mA) (typ) 2.5
Tx EN Yes
Rx EN Yes
ICC (Shutdn.) (µA) (typ) 1
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.47

Key Features

  • Recommended for PROFIBUS Applications
  • Up to 40Mbps Data Rate
  • 15ns Transmitter Propagation Delay
  • 20ns 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

Applications/Uses

  • High-Speed RS-422 Communications
  • High-Speed RS-485 Communications
  • Industrial-Control Local Area Networks
  • Level Translators
  • PROFIBUS Applications

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 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.

Simplified Block Diagram

MAX3465, MAX3466, MAX3467, MAX3468, MAX3469: Pin Configurations and Typical Operating Circuit MAX3465, MAX3466, MAX3467, MAX3468, MAX3469: Pin Configurations and Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .