19-4770; Rev 2; 12/05
1ꢀ5k ꢁEDꢂ-rotected, Eingle/Dual/Octal,
CMOE Ewitch Debouncers
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.
♦ 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
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.
♦ No External Components Required
♦ 6µA Supply Current
♦ Three-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.
Switches to µP Data Bus (MAX6818)
♦ Switch Change-of-State Output Simplifies
Polling and Interrupts (MAX6818)
♦ Pin-Compatible with ’LS573 (MAX6818)
Ordering Information
PIN-
SOT
Applications
PART
TEMP RANGE
PACKAGE TOP MARK
µP ꢁwitch Interfacing
Industrial Instruments
PCSBased Instruments
Portable Instruments
Automotive Applications
Membrane Keypads
MAX6816VUꢁST S40°C to +82°C 4 ꢁOT143
MAX6817VUTST S40°C to +82°C 6 ꢁOT±3S6
KABA
AAAU
—
MAX6818VAP
S40°C to +82°C ±0 ꢁꢁOP
Note: There is a minimum order increment of 2500 pieces for
SOT packages.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
-in Configurations
Typical Operating Circuit
TOP VIEW
V
CC
V
4
CC
GND
1
2
MAX6816
µP
MAX6816
MECHANICAL
SWITCH
0.1µF
IN
OUT
RESET
DEBOUNCED
OUTPUT
IN
3
OUT
GND
SOT143
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.