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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

Product Details

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 ›

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
    • Withstands up to ±4kV EFT
    • 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 and an 8-pin µMAX Package
    • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Backplane Busses
  • Encoder Interfaces
  • Field Bus Networks
  • Industrial Control Systems
  • Motion Control
Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Half
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (min) 100000
Fault Protect. (±V) 15
ICC (mA) (typ) 12.7
ESD Protect. (±kV) 15
Tx EN No
Rx EN No
ICC (Shutdn.) (µA) (typ) 5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$3.69 @1k
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Simplified Block Diagram

MAX22500E, MAX22501E: Simplified Block Diagram MAX22500E, MAX22501E: Simplified Block Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX22501E evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX22501E half-duplex, high speed RS-485/RS-422 transceiver. The EV kit operates from a single 3V to 5V supply and includes selectable on-board termination.

View Details

Features

  • Operates From a Single 3V to 5V Supply
  • Terminal Block and RJ45 Connectors for Easy RS-485/RS-422 Evaluation
  • Fully Assembled and Tested

Description

The MAX22500E evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX22500E half-duplex high speed RS-485/RS-422 transceiver with preemphasis functionality. The EV kit operates from a single 5V supply and includes on-board termination.

View Details

Features

  • Operates From a Single 5V Supply
  • Terminal Block and RJ45 Connectors for Easy RS-485/RS-422 Evaluation
  • On-board Selectable Preemphasis Setting
  • Fully Assembled and Tested

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SIMULATION MODELS

MAX22500E IBIS Model

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Parameters

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Half
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (min) 100000
Fault Protect. (±V) 15
ICC (mA) (typ) 12.7
ESD Protect. (±kV) 15
Tx EN No
Rx EN No
ICC (Shutdn.) (µA) (typ) 5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$3.69 @1k

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
    • Withstands up to ±4kV EFT
    • 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 and an 8-pin µMAX Package
    • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Backplane Busses
  • Encoder Interfaces
  • Field Bus Networks
  • Industrial Control Systems
  • Motion Control

Description

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 ›

Simplified Block Diagram

MAX22500E, MAX22501E: Simplified Block Diagram MAX22500E, MAX22501E: Simplified Block 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