19S4770; Rev 3; 8/10
1ꢀ5k ꢁEDꢂ-rotected, Eingle/Dual/Octal,
CMOE Ewitch Debouncers
7/MAX618
General Description
Features
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 ±±25 levels and are ±12ꢀ5 VꢁES
protected for use in harsh industrial environments. They
feature singleSsupply operation from +±.75 to +2.25.
Undervoltage locꢀout circuitry ensures the output is in
the correct state upon powerSup.
o Robust Inputs can Exceed Power Supplies
up to 2ꢀ5
o ESD Protection for Input Pins
1ꢀꢁ5V—uman ꢂody Model
8ꢁ5VIEꢃ 1ꢄꢄꢄ-4-2, ꢃontact Discꢅarge
1ꢀꢁ5VIEꢃ 1ꢄꢄꢄ-4-2, ꢆir-ꢇap Discꢅarge
o Small SOT Pacꢁages (4 and 6 pins)
o Single-Supply Operation from +2.75 to +ꢀ.ꢀ5
o Single (MꢆX6816), Dual (MꢆX6817), and Octal
(MꢆX6818) 5ersions ꢆvailable
The single MAX6816 and dual MAX6817 are offered in
ꢁOT pacꢀages and require no external components.
Their low supply current maꢀes them ideal for use in
portable equipment.
o No External ꢃomponents Required
o 6µꢆ Supply ꢃurrent
o Tꢅree-State Outputs for Directly Interfacing
The MAX6818 octal switch debouncer is designed for
dataSbus interfacing. The MAX6818 monitors switches
and provides a switch changeSofSstate output (CH),
simplifying microprocessor (µP) polling and interrupts.
Additionally, the MAX6818 has threeSstate outputs conS
trolled by an enable (EN) pin, and is pinScompatible
with the Lꢁ273 octal latch (except for the CH pin),
allowing easy interfacing to a digital data bus.
Switcꢅes to µP Data ꢂus (MꢆX6818)
o Switcꢅ ꢃꢅange-of-State Output Simplifies
Polling and Interrupts (MꢆX6818)
o Pin-ꢃompatible witꢅ ’LSꢀ73 (MꢆX6818)
Ordering Information
PIN-
SOT
Applications
PꢆRT
TEMP RꢆNꢇE
PꢆꢃKꢆꢇE TOP MꢆRK
µP ꢁwitch Interfacing
Industrial Instruments
PCSBased Instruments
Portable Instruments
Automotive Applications
Membrane Keypads
MꢆX6816VUꢁST S40°C to +1±2°C 4 ꢁOT143
MꢆX6817VUTST S40°C to +1±2°C 6 ꢁOT±3S6
KABA
AAAU
—
MꢆX6818VAP
S40°C to +1±2°C ±0 ꢁꢁOP
Note: There is a minimum order increment of ±200 pieces for
ꢁOT pacꢀages.
Eevices are available in both leaded and leadSfree pacꢀaging.
ꢁpecify leadSfree by replacing “ST” with “+T” when ordering.
-in Configurations
Typical Operating Circuit
TOP VIEW
V
CC
GND
1
4
V
CC
MAX6816
µP
MAX6816
MECHANICAL
SWITCH
0.1µF
IN
OUT
RESET
DEBOUNCED
OUTPUT
IN
3
OUT
2
GND
SOT143
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.