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+3.3V-Powered, ±20kV ESD-Protected, 20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers

High ESD protection increases robustness and reliability of industrial end equipment

Product Details

Key Features

Applications/Uses

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Full
VSUPPLY (V) 3.3
Data Rate (kbps) (min) 20000
ICC (mA) (typ) 1.9
ESD Protect. (±kV) 20
Tx EN No
Rx EN No
Oper. Temp. (°C) -40 to +105
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.24
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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 Full
VSUPPLY (V) 3.3
Data Rate (kbps) (min) 20000
ICC (mA) (typ) 1.9
ESD Protect. (±kV) 20
Tx EN No
Rx EN No
Oper. Temp. (°C) -40 to +105
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.24

Key Features

  • Integrated Protection Increases Robustness
    • High ESD Protection
      • ±20kV HBM ESD per JEDEC JS-001-2012
      • ±15kV Air Gap per IEC 61000-4-2
      • ±8kV Contact ESD per IEC 61000-4-2
    • Short-Circuit Protected Outputs
    • True Fail-Safe Receiver Prevents False Transition on Receiver Input Short or Open Events
    • Hot-Swap Capability Eliminates False Transitions During Power-Up or Hot Insertion
  • High-Speed Data Rates up to 20Mbps
  • Up to -40°C to +125°C Operating Temperature
  • Allows Up to 128 Transceivers on the Bus

Applications/Uses

  • Industrial-Control Local Area Networks
  • Telecommuncations
  • Transceivers for EMI-Sensitive Applications

Description

Devices in the MAX3483AE family (MAX3483AE/MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE) are ±20kV ESD-protected RS-485/422 transceivers, optimized for extended cable runs in noisy environments. All devices operate from a single 3.3V supply.

The MAX3483AE and MAX3485AE are half-duplex transceivers. The MAX3488AE, MAX3490AE, and MAX3491AE are full-duplex transceivers. The MAX3483AE/85AE have a 1-unit load receiver input impedance, allowing up to 32 transceivers on the bus. The MAX3488AE/90AE/91AE have a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. Each transceiver includes a fail-safe receiver, ensuring that the receiver output (RO) is high when inputs are shorted, open, or connected to a three-state bus.

The MAX3483AE, MAX3485AE, MAX3488AE, and MAX3490AE are available in industry standard 8-pin SO package, while the MAX3491AE is available in a 14-pin SO package.

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Simplified Block Diagram

MAX3483AE, MAX3485AE, MAX3488AE, MAX3490AE, MAX3491AE: Functional Diagram MAX3483AE, MAX3485AE, MAX3488AE, MAX3490AE, MAX3491AE: Functional Diagram 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 .