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The Intersil ISL43L840 device is a precision, bidirectional, analog switches configured as a dual 4-channel multiplexer/demultiplexer, designed to operate from a single +1. 6V to +3. 6V supply. ON resistance is 0. 5Ω with a +3V supply and 0. 62Ω with a single +1. 8V supply. Each switch can handle rail to rail analog signals. The off-leakage current is only 4nA max at +25°C and 30nA max at +85°C with a +3. 3V supply. All digital inputs are 1. 8V logic-compatible when using a single +3V supply. The ISL43L840 is a dual 4 to 1 multiplexer device that is offered in a 16 Ld TSSOP and 16 Ld 3x3 QFN packages.


  • ON Resistance (RON)
  • V+ = +3.0V 0.5Ω
  • V+ = +1.8V 0.62Ω
  • RON Matching Between Channels 0.12Ω
  • RON Flatness Across Signal Range 0.056Ω
  • Single Supply Operation +1.6V to +3.6V
  • Low Power Consumption (PD) <0.2µW
  • Fast Switching Action (VS = +3V)
  • tRANS 19ns
  • Guaranteed Break-Before-Make
  • High Current Handling Capacity (300mA Continuous)
  • Available in 16 Ld 3x3 QFN and 16 Ld TSSOP
  • 1.8V CMOS-Logic Compatible (+3V Supply)
  • Pb-Free Available as an Option (RoHS Compliant) (see Ordering Info)


  • 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 QFN Tube 1000
Obsolete QFN Reel 6000
Obsolete TSSOP Tube 960
Obsolete TSSOP Reel 2500

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL43L840 Datasheet Datasheet PDF 562 KB
Application Notes & White Papers
AN557: Recommended Test Procedures for Analog Switches Application Note PDF 468 KB
PCN12094 - Alternate Manufacturing Site for Assembly of the Listed Intersil Packaged Products - Amkor Technology, Philippines (ATP) Product Change Notice PDF 98 KB
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB