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The Intersil ISL43L220 device is a low ON-resistance, low voltage, bidirectional, dual single-pole/double-throw (SPDT) analog switch designed to operate from a single +1. 1V to +4. 5V supply. Targeted applications include battery powered equipment that benefit from low RON (0. 22Ω) and fast switching speeds (tON = 11ns, tOFF = 5ns). The digital logic input is 1. 8V logic-compatible when using a single +3V supply. Cell phones, for example, often face ASIC functionality limitations. The number of analog input or GPIO pins may be limited and digital geometries are not well suited to analog switch performance. This part may be used to “mux-in” additional functionality while reducing ASIC design risk. The ISL43L220 is offered in a small form factor package, alleviating board space limitations. The ISL43L220 is a committed dual single-pole/double-throw (SPDT) that consist of two normally open (NO) and two normally closed (NC) switches. This configuration can also be used as a dual 2-to-1 multiplexer. The ISL43L220 is pin compatible with the MAX4684 and MAX4685. `


  • Pb-Free (RoHS Compliant)
  • ON Resistance (RON)
  • V+ = +4.3V: 0.22Ω
  • V+ = +3.0V: 0.26Ω
  • V+ = +1.8V: 0.5Ω
  • RON Matching Between Channels: 0.03Ω
  • RON Flatness Across Signal Range: 0.03Ω
  • Single Supply Operation: +1.1V to +4.5V
  • Low Power Consumption (PD): <0.3µW
  • Fast Switching Action (V+ = +4.3V)
  • tON: 11ns
  • tOFF: 5ns
  • Guaranteed Break-Before-Make
  • 1.8V Logic Compatible (+3V supply)
  • Available in 10 lead 3x3 thin DFN
  • ESD HBM Rating: >9kV


  • Battery powered, handheld, and portable equipment
  • Cellular/mobile phones
  • Pagers
  • Laptops, notebooks, palmtops
  • Portable Test and Measurement
  • Medical Equipment
  • Audio and video switching

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Obsolete TDFN Tube 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL43L220 Datasheet Datasheet PDF 698 KB
Application Notes & White Papers
AN557: Recommended Test Procedures for Analog Switches Application Note PDF 468 KB
PCN13020 - Data Sheet Specification Change for Intersil Product ISL43L220IRZ and ISL43L220IRZ-T Product Change Notice PDF 255 KB
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB