The ICL232 is a dual RS-232 transmitter/receiver interface circuit that meets all ElA RS-232C and V. 28 specifications. It requires a single +5V power supply, and features two onboard charge pump voltage converters which generate +10V and -10V supplies from the 5V supply. The drivers feature true TTL/CMOS input compatibility, slewrate- limited output, and 300Ω power-off source impedance. The receivers can handle up to +30V, and have a 3kΩ to 7kΩ input impedance. The receivers also have hysteresis to improve noise rejection.


  • Meets all RS-232C and V.28 specifications
  • Requires only single +5V power supply
  • Onboard voltage doubler/inverter
  • Low power consumption
  • 2 drivers
  • ±9V output swing for +5V input
  • 300Ω power-off source impedance
  • output current limiting
  • TTL/CMOS compatible
  • 30V/µs maximum slew rate
  • 2 Receivers
  • ±30V input voltage range
  • 3kΩ to 7kΩ input impedance
  • 0.5V hysteresis to improve noise rejection
  • All critical parameters are guaranteed over the entire commercial, industrial and military temperature ranges
  • Pb-free (RoHS compliant)


  • Any System Requiring RS-232 Communications Port Computer - Portable and Mainframe Peripheral - Printers and Terminals Portable Instrumentation Modems
  • Dataloggers

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOICW Tube 480
Active SOICW Reel 1000

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ICL232 Datasheet Datasheet PDF 489 KB
Application Notes & White Papers
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Application Note PDF 178 KB
How to Simplify Industrial PC Interfaces 简体中文 White Paper PDF 920 KB
AN1992: Isolating RS-232 Interfaces with High-Speed Digital Optocouplers Application Note PDF 395 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
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
PCN12094 - Alternate Manufacturing Site for Assembly of the Listed Intersil Packaged Products - Amkor Technology, Philippines (ATP) Product Change Notice PDF 98 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB