19-4770; Rev 1; 1/99
±15kV ESD-Protected, Single/Dual/Octal,
CMOS Switch Debouncers
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
The MAX6818 octal switch debouncer is designed for
data-bus interfacing. The MAX6818 monitors switches
and provides a switch change-of-state output (CH),
simplifying microprocessor (µP) polling and interrupts.
Additionally, the MAX6818 has three-state outputs con-
trolled by an enable (EN) pin, and is pin-compatible
with the ‘LS573 octal latch (except for the
allowing easy interfacing to a digital data bus.
Robust 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
Small SOT Packages (4 and 6 pins)
Single-Supply Operation from +2.7V to +5.5V
Single (MAX6816), Dual (MAX6817), and Octal
(MAX6818) Versions Available
No External Components Required
6µA Supply Current
Three-State Outputs for Directly Interfacing
Switches to µP Data Bus (MAX6818)
Switch Change-of-State Output Simplifies
Polling and Interrupts (MAX6818)
Pin-Compatible with ’LS573 (MAX6818)
-40°C to +85°C
PACKAGE TOP MARK
µP Switch Interfacing
-40°C to +85°C 6 SOT23-6
-40°C to +85°C 20 SSOP
There is a minimum order increment of 2500 pieces for
Typical Operating Circuit
Pin Configurations continued at end of data sheet.
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.