The ISL32610E, ISL32611E, ISL32612E are ±16. 5kV IEC61000 ESD protected, fractional unit load (UL), 1. 8V powered, single differential receivers (Rx) for balanced data communication using the RS-485 and RS-422 standards. With their 85µA supply currents, the receivers are optimized for low power applications, and deliver the lowest supply currents of any available single Rx IC To improve performance in low data rate applications with slow signal transitions, these Rx feature symmetrical switching points (±200mV) and increased hysteresis. The symmetrical switching points eliminate the duty cycle distortion introduced by full-failsafe type receivers, while the larger hysteresis increases noise immunity. The receivers present a 1/8 unit load to the data bus, which allows up to 256 devices on the network for large node count systems (for example, process automation, remote meter reading systems). The ISL32611E/ISL32612E Rx output is tri-statable using the RE/RE input. The receiver inputs feature a failsafe-if-open design, which ensures a logic high Rx output if Rx inputs are floating. Data rates up to 256kbps are achievable with this device at VCC = 1. 8V.


  • Wide Supply Voltage Range: 1.8V to 3.6V
  • Ultra Low Quiescent Supply Current 110µA (maximum)
  • IEC61000 ESD Protection on RS-485 Bus Pins ±16.5kV
  • Class 3 ESD Level on all Other Pins >8kV HBM
  • Symmetrical Switching Thresholds for Less Duty Cycle Distortion
  • Larger Hysteresis for Improved Noise Immunity 70mV
  • Data Rates up to 256kbps (1.8V) or 500kbps (3.3V)
  • 1/8 Unit Load Allows up to 256 Devices on the RS-485 Bus
  • Specified for +125°C Operation
  • Three-State Rx Output Available
  • 5V tolerant logic inputs
  • Pb-Free (RoHS Compliant)


  • Industrial/Process Control Networks
  • Factory Automation
  • High Node Count Networks
  • Space Constrained Systems
  • Building Environmental Control Systems


Title language Type Format File Size Date
star ISL32610E, ISL32611E, ISL32612E Datasheet Datasheet PDF 867 KB
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Rev.1.00 Application Note PDF 178 KB
AN1991: Isolating RS-485 Interfaces with High-Speed Digital Optocouplers Application Note PDF 513 KB
AN1990: RS-485 Transceivers in J1708 Physical Layer Applications of Heavy Duty Vehicles Application Note PDF 826 KB
AN1987: RS-485 External Fail-Safe Biasing for Isolated Long Haul Buses Application Note PDF 443 KB
AN1986: External Fail-Safe Biasing of RS-485 Networks Application Note PDF 582 KB
AN1985: Transient Protection for the Standard RS-485 Transceiver: ISL3152E Application Note PDF 335 KB
AN1989: RS-422 vs RS-485: Similarities and Key Differences Application Note PDF 440 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
How to Simplify Industrial PC Interfaces 简体中文 White Paper PDF 920 KB
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
PLC21035 - End of Life Notice Product Life Cycle Notice PDF 1.17 MB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
TB506: Functional Principles of RS-485 Drivers and Receivers Other PDF 156 KB
TB511: The Unit Load Concept Other PDF 253 KB
TB505: Understanding the Difference between HBM and IEC 61000-4-2 ESD Immunity Other PDF 254 KB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Technical Brief PDF 300 KB


Title language Type Format File Size Date
isl32611e_1v8 Model - Other IBS 17 KB