The ICL3221EM and ICL3221EF devices are 3. 3V powered RS-232 transmitters/receivers that meet ElA/TIA-232 and V. 28/V. 24 specifications. Additionally, they provide ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Efficient on-chip charge pumps, coupled with manual and automatic powerdown functions, reduce the standby supply current to a 1µA trickle. Small footprint packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kbps are ensured at worst case load conditions. These devices are fully compatible with 3. 3V-only systems. The ICL3221EM and ICL3221EF feature an automatic power-down function that powers down the on-chip power-supply and driver circuits. Power-down occurs when an attached peripheral device is shut off or the RS-232 cable is removed, and conserves system power automatically without changes to the hardware or operating system. These devices power up again when a valid RS-232 voltage is applied to any receiver input.

Features

  • ESD protection for RS-232 I/O pins to ±15kV (IEC61000)
  • RS-232 compatible with VCC = 2.7V
  • Meets EIA/TIA-232 and V.28/V.24 specifications at 3V
  • Latch-up free
  • On-chip voltage converters require only four external 0.1µF capacitors
  • Manual and automatic powerdown features
  • Receiver hysteresis for improved noise immunity
  • Assured minimum data rate: 250kbps
  • Power supply range: single +3.0V to +3.6V
  • Low supply current in powerdown state: 1µA
  • Pb-free (RoHS compliant)

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TSSOP Tube 960
Availability
Active TSSOP Reel 2500
Availability
Active TSSOP Reel 250
Availability

Documentation

Title language Type Format File Size Date
Datasheets & Errata
ICL3221EM, ICL3221EF Datasheet Datasheet PDF 315 KB
Application Notes & White Papers
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Application Note PDF 178 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
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
Other
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB