Features and Benefits

  • Switch Debouncer Integration Simplifies System Interface to Mechanical Switches
    • Single-Supply Operation from +2.7V to +5.5V
    • No External Components Required
    • Single (MAX6816), Dual (MAX6817), and Octal (MAX6818) Versions Available
    • 6µA Supply Current
  • Built-In Protection Circuitry Improves System Reliability
    • Inputs Can Exceed Power Supplies up to ±25V
    • ESD Protection for Input Pins
      • ±15kV—Human Body Model
      • ±8kV—IEC 1000-4-2, Contact Discharge
      • ±15kV—IEC 1000-4-2, Air-Gap Discharge
  • Octal Version (MAX6818) Provides Direct Data Bus Interface
    • Three-State Outputs for Directly Interfacing to µP (MAX6818)
    • Switch Change-of-State Output Simplifies Polling and Interrupts (MAX6818)
    • Pin-Compatible with 'LS573 (MAX6818)

Product Details

The MAX6816/MAX6817/MAX6818 are single, dual, and octal switch debouncers that provide clean interfacing of mechanical switches to digital systems. They accept one or more bouncing inputs from a mechanical switch and produce a clean digital output after a short, preset qualification delay. Both the switch opening bounce and the switch closing bounce are removed. Robust switch inputs handle ±25V levels and are ±15kV ESD-protected for use in harsh industrial environments. They feature single-supply operation from +2.7V to +5.5V. Undervoltage lockout circuitry ensures the output is in the correct state upon power-up.

The single MAX6816 and dual MAX6817 are offered in SOT packages and require no external components. Their low supply current makes them ideal for use in portable equipment.

The MAX6818 octal switch debouncer is designed for data-bus interfacing. The MAX6818 monitors switches and provides a switch change-of-state output (active-low CH), simplifying microprocessor (µP) polling and interrupts. Additionally, the MAX6818 has three-state outputs controlled by an enable (active-low EN) pin, and is pin-compatible with the LS573 octal latch (except for the active-low CH pin), allowing easy interfacing to a digital data bus.


  • µP Switch Interfacing
  • Industrial Instruments
  • Membrane Keypads
  • PC-Based Instruments
  • Portable Instrumentation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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