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±80V Fault-Protected, Full-Duplex RS-485 Transceiver

Industry's First ±80V Fault-Protected, Full-Duplex RS-485 Transceiver

Product Details

The MAX13448E full-duplex RS-485 transceiver features inputs and outputs fault protected up to ±80V (with respect to ground). The device operates from a +3.0V to +5.5V supply and features true fail-safe circuitry, guaranteeing 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-high when all transmitters are disabled.

The MAX13448E features a slew-rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 500kbps with a +5V supply, and 250kbps with a +3.3V supply.

The MAX13448E includes a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion. The driver and receiver feature active-high and active-low enables, respectively, that can be connected together externally to serve as a direction control.

The MAX13448E features an 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±8kV ESD using the Human Body Model. The MAX13448E is available in a 14-pin SO package and operates over the extended -40°C to +85°C temperature range.

Key Features

  • ±80V Fault Protection on the RS-485 I/O Ports
  • True Fail-Safe Receiver
  • Hot-Swap Input Structure on DE
  • ESD Protection on the RS-485 I/O Ports ±8kV Human Body Model
  • Slew-Rate Limiting Facilitates Error-Free Data Transmission
  • 1/8-Unit Load Allows Up to 256 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Voltage Range
  • +3.0V to +5.5V Operating Supply Voltage
  • Available in 14-Pin SO Package

Applications/Uses

  • HVAC Control Systems
  • Industrial Control Systems
  • Motor Driver Control Systems
  • Utility Meters
Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Full
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (min) 500
Fault Protect. (±V) 80
ICC (mA) (typ) 4.5
ESD Protect. (±kV) 15
Tx EN Yes
Rx EN Yes
ICC (Shutdn.) (µA) (typ) 10
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/14
Budgetary
Price (See Notes)
$2.46 @1k
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Simplified Block Diagram

MAX13448E: Functional Diagram MAX13448E: Functional Diagram Zoom icon

Technical Docs

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Parameters

Parametric specs for RS-485/RS-422 Line Driver/Receivers
# Tx/Rx 1Tx + 1Rx
Duplex Full
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (min) 500
Fault Protect. (±V) 80
ICC (mA) (typ) 4.5
ESD Protect. (±kV) 15
Tx EN Yes
Rx EN Yes
ICC (Shutdn.) (µA) (typ) 10
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/14
Budgetary
Price (See Notes)
$2.46 @1k

Key Features

  • ±80V Fault Protection on the RS-485 I/O Ports
  • True Fail-Safe Receiver
  • Hot-Swap Input Structure on DE
  • ESD Protection on the RS-485 I/O Ports ±8kV Human Body Model
  • Slew-Rate Limiting Facilitates Error-Free Data Transmission
  • 1/8-Unit Load Allows Up to 256 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Voltage Range
  • +3.0V to +5.5V Operating Supply Voltage
  • Available in 14-Pin SO Package

Applications/Uses

  • HVAC Control Systems
  • Industrial Control Systems
  • Motor Driver Control Systems
  • Utility Meters

Description

The MAX13448E full-duplex RS-485 transceiver features inputs and outputs fault protected up to ±80V (with respect to ground). The device operates from a +3.0V to +5.5V supply and features true fail-safe circuitry, guaranteeing 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-high when all transmitters are disabled.

The MAX13448E features a slew-rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 500kbps with a +5V supply, and 250kbps with a +3.3V supply.

The MAX13448E includes a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion. The driver and receiver feature active-high and active-low enables, respectively, that can be connected together externally to serve as a direction control.

The MAX13448E features an 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±8kV ESD using the Human Body Model. The MAX13448E is available in a 14-pin SO package and operates over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX13448E: Functional Diagram MAX13448E: 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