The ISL88042 is a Quadruple voltage-monitoring supervisor combining competitive reset threshold accuracy and low power consumption. This device combines popular functions such as Power-On Reset, Undervoltage Supply Supervision, reset signaling and Manual Reset. Monitoring four different supplies in a 8 Ld 2x3 TDFN package, the ISL88042 devices can help to lower system cost, reduce board space requirements, and increase the reliability of multi-voltage systems. Low VDD detection circuitry protects the user's system from low voltage conditions, resetting the system when VDD or any of the other monitored power supply voltages fall below their respective minimum voltage thresholds. The reset signal remains asserted until all of these voltages return to proper operating levels and stabilize. Two of the four voltage monitors have preset thresholds for either dual 3. 3V or one each for one 5V and one 3. 3V supplies. Users can adjust the threshold voltages of the third and fourth voltage monitors in order to meet specific system level requirements.


  • Quadruple Voltage Monitoring
  • Fixed-Voltage Options Allow Precise Monitoring of +5.0V and +3.3V Power Supplies
  • Two Adjustable Voltage Inputs Monitor Voltages > 0.6V
  • 95ms Nominal Reset Pulse Width
  • Manual Reset Capability
  • Reset Signals Valid Down to VDD = 1V
  • Immune to Power-Supply Transients
  • Low 22µA Maximum Supply Current at 5V
  • Pb-Free (RoHS Compliant)


  • Telecom and Datacom Systems
  • Routers and Servers
  • Access Concentrators
  • Cable/Satellite Applications
  • Desktop and Notebook Computer Systems
  • Data Storage Equipment
  • Set-Top Boxes
  • Industrial Equipment
  • Multi-Voltage 1 Systems

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TDFN Reel 6000
Active TDFN Reel 1000
Active TDFN Reel 6000
Active TDFN Reel 1000
Active TDFN Reel 6000
Active TDFN Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL88042 Datasheet Datasheet PDF 464 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
How Green is Your Cloud? White Paper PDF 295 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB