100Mbps Half-Duplex RS-485/RS-422 Transceivers for Long Cables

Industry's Fastest RS-485 Transceivers with Preemphasis Improve Robust Communications with Longer Cables

Please check latest availability status for a specific part variant.


The MAX22500E/MAX22501E half-duplex ESD-protected RS-485/RS-422 transceivers are optimized for high-speed (up to 100Mbps) communication over long cables. These transceivers feature integrated hot-swap protectionand a fail-safe receiver, ensuring a logic-high on the receiver output when input signals are shorted or open for longer than 10μs (typ).

The MAX22500E features integrated preemphasis circuitry that extends the distance and increases the data rate of reliable communication by reducing inter-symbol interference(ISI) caused by long cables. The MAX22500E features a flexible logic interface down to 1.6V.

The MAX22501E operates without preemphasis and is powered from a 3V to 5.5V supply.

The MAX22500E is available in a 10-pin TDFN-EP package. The MAX22501E is available in a 8-pin TDFN-EP package.

Both transceivers operate over the -40°C to +125°C ambient temperature range.

Also see the MAX22502E Full-Duplex RS-485/RS-422 Transceiver ›

Design Solution: RS-485: Overcome the Speed vs. Distance Challenge ›

MAX22500E, MAX22501E: Simplified Block Diagram MAX22500E, MAX22501E: Simplified Block Diagram Enlarge+

Key Features

  • High-Speed Operation Over Long Distances
    • Up to 100Mbps Data Rate
    • Integrated Preemphasis Extends Cable Length (MAX22500E)
    • High Receiver Sensitivity
    • Wide Receiver Bandwidth
    • Symmetrical Receiver Thresholds
  • Integrated Protection Increases Robustness
    • -15V to +15V Common Mode Range
    • ±15kV ESD Protection (Human Body Model)
    • ±7kV IEC 61000-4-2 Air-Gap ESD Protection
    • ±6kV IEC 61000-4-2 Contact Discharge ESD Protection
    • Driver Outputs are Short-Circuit Protected
  • Flexibility for Many Different Applications
    • 3V to 5.5V Supply Range
    • Low Voltage Logic Supply Down to 1.6V (MAX22500E)
    • Low 5μA (max) Shutdown Current
    • Available in 8-pin or 10-pin TDFN Package
    • -40°C to +125°C Operating Temperature Range


  • Backplane Busses
  • Encoder Interfaces
  • Field Bus Networks
  • Industrial Control Systems
  • Motion Control
Part NumberTx/RxDuplexVSUPPLY
Fault Protect.
Data Rate
ESD Protect.
Tx ENRx ENICC (Shutdn.)
Slew Rate LimitingOper. Temp.
typmintypSee Notes
MAX22500E 1Tx + 1RxHalf3.0 to 5.51512.710000015NoNo5No-40 to +125
$3.51 @1k
MAX22501E 4
SOIC (N)/8
$1.79 @1k
See All RS-485/RS-422 Line Driver/Receivers (205)
Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX22501EEVKIT: Evaluation Kit for the MAX22501E
MAX22500EEVKIT: Evaluation Kit for the MAX22500E

Tools & Models

  • MAX22501E IBIS Model
  • CAD Symbols and Footprints

  • MAX22501EATA+
  • MAX22501EATA+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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