Support is limited to customers who have already adopted these products.

The Intersil ISL43143-ISL43145 devices are CMOS, precision, quad SPST analog switches designed to operate from a single +2V to +12V supply or from a ±2V to ±6V supply. Targeted applications include battery powered equipment that benefit from the devices' low power consumption (ON = 52ns, tOFF = 40ns). A 5Ω maximum RON flatness ensures signal fidelity, while channel-to-channel mismatch is guaranteed to be less than 2Ω. The ISL43143/ISL43144/ISL43145 are quad single-pole/ single-throw (SPST) devices. The ISL43143 has four normally closed (NC) switches; the ISL43144 has four normally open (NO) switches; the ISL43145 has two NO and two NC switches and can be used as a dual SPDT, or a dual 2:1 multiplexer.


  • Fully Specified for 10% Tolerances at VS = ±5V and V+ = 12V, 5V and 3.3V
  • Four Separately Controlled SPST Switches
  • Pin Compatible with DG411/DG412/DG413
  • ON Resistance (RON Max.) 25Ω
  • RON Matching Between Channels <1Ω
  • Low Power Consumption (PD) <1µW
  • Low Off Leakage Current (Max at 85°C) 2.5nA
  • Fast Switching Action
  • tON 52ns
  • tOFF 40ns
  • Minimum 2000V ESD Protection per Method 3015.7
  • TTL, CMOS Compatible
  • Pb-Free Plus Anneal Available (RoHS Compliant)


  • Battery Powered, Handheld, and Portable Equipment Barcode Scanners Laptops, Notebooks, Palmtops
  • Communications Systems Radios XDSL and PBX/PABX RF "Tee" Switches Base Stations
  • Test Equipment Medical Ultrasound Electrocardiograph ATE
  • Audio and Video Switching
  • General Purpose Circuits +3V/+5V DACs and ADCs Digital Filters Operational Amplifier Gain Switching Networks High Frequency Analog Switching High Speed Multiplexing

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Obsolete QFN Tube 1500
Obsolete QFN Reel
Obsolete TSSOP Tube
Obsolete TSSOP Reel
Obsolete TSSOP Tube 1920
Obsolete TSSOP Reel 2500

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL43143, ISL43144, ISL43145 Datasheet Datasheet PDF 982 KB
Application Notes & White Papers
AN535: Design Considerations for a Data Acquisition System (DAS) Application Note PDF 843 KB
PCN16043 - Alternate leadframe material for assembly of the listed Intersil TSSOP packaged products Product Change Notice PDF 78 KB
PCN12094 - Alternate Manufacturing Site for Assembly of the Listed Intersil Packaged Products - Amkor Technology, Philippines (ATP) Product Change Notice PDF 98 KB