Device Information
 
 
ISL3179E Printer Friendly Version
High ESD Protected, +125°C, 40Mbps, 3.3V, Full
Fail-Safe, RS-485/RS-422 Transceivers
 
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Datasheet
Adobe Acrobat Document ISL3179E
High ESD Protected, +125°C, 40Mbps, 3.3V, Full Fail-Safe, RS-485/RS-422 Transceivers
# of RS-485 Tx1
# of RS-485 Rx1
RS-485 Devices Allowed on Bus160
Half/Full Duplex RS-485Half
High ESDYes-IEC61000
Hot PlugYes
RS-485 Data Rate (Mbps)40
Slew Rate LimitedNo
Tx/Rx EnableYes
IS EN/DIS (μA)2600/2600
SHDN ICC (μA)<1
VCC Range (V)3.0 to 3.6
VL PinNo
 

Product Information

Key Features
  • High ESD Protection on RS-485 I/O Pins
    • ISL3179E: ±16.5kV IEC61000
    • ISL3180E: ±12kV HBM
    • Class 3 HBM ESD Level on all Other Pins: >9kV
  • Specified for +125°C Operation
  • High Data Rates: up to 40Mbps
  • 5V Tolerant Logic Inputs
  • 1/5 Unit Load Allows up to 160 Devices on the Bus
  • Full Fail-Safe (Open, Shorted, Terminated/Undriven) Receiver
  • Hot Plug - Tx and Rx Outputs Remain Three-State During Power-Up
  • Low Quiescent Current: 4mA (Max)
  • Low Current Shutdown Mode: 1μA (Max)
  • -7V to +12V Common Mode Input Voltage Range
  • Three-State Rx and Tx Outputs
  • 16/16.5ns (Max) Tx/Rx Propagation Delays; 1.5ns (Max) Skew
  • Operates from a Single +3.3V Supply (10% Tolerance)
  • Current Limiting and Thermal Shutdown for driver Overload Protection
  • Pb-Free (RoHS Compliant)
Description

Intersil’s ISL3179E and ISL3180E are high ESD Protected, 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents (+220μA/-150μA), so it presents a “1/5 unit load” to the RS-485 bus. This allows up to 160 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters.

Receiver (Rx) inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven.

The ISL3180E is configured for full duplex applications. The ISL3179E half duplex version multiplexes the Rx inputs and Tx outputs to allow a transceiver with an output disable function in 8 Ld packages.

Hot Plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes.

Pricing / Packaging / Samples / Ordering

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Part No.Design-In
Status		Temp.PackageMSLPrice
US $		PB Free
ISL3179EFBZ Active Full-Range Ind 8 Ld SOIC 1 1.40 PB Free Buy Direct Disti-Buy Sample
ISL3179EFBZ-T Active Full-Range Ind 8 Ld SOIC T+R 1 1.40 PB Free Disti-Buy  
ISL3179EFRZ Active Full-Range Ind 10 Ld DFN 1 1.40 PB Free Buy Direct Disti-Buy Sample
ISL3179EFRZ-T Active Full-Range Ind 10 Ld DFN T+R 1 1.40 PB Free Disti-Buy  
ISL3179EFUZ Active Full-Range Ind 8 Ld MSOP 2 1.40 PB Free Buy Direct Disti-Buy Sample
ISL3179EFUZ-T Active Full-Range Ind 8 Ld MSOP T+R 2 1.40 PB Free Disti-Buy  
ISL3179EIBZ Active Ind 8 Ld SOIC 1 1.07 PB Free Buy Direct Disti-Buy Sample
ISL3179EIBZ-T Active Ind 8 Ld SOIC T+R 1 1.07 PB Free Disti-Buy  
ISL3179EIRZ Active Ind 10 Ld DFN 1 1.07 PB Free Out of stock Disti-Buy Sample
ISL3179EIRZ-T Active Ind 10 Ld DFN T+R 1 1.07 PB Free Disti-Buy  
ISL3179EIUZ Active Ind 8 Ld MSOP 2 1.07 PB Free Buy Direct Disti-Buy Sample
ISL3179EIUZ-T Active Ind 8 Ld MSOP T+R 2 1.07 PB Free Disti-Buy  
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing

Technical Documentation

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Application Block Diagrams
Applications
  • Motor Controller/Position Encoder Systems
  • Factory Automation
  • Field Bus Networks
  • Security Networks
  • Building Environmental Control Systems
  • Industrial/Process Control Networks
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