Click here for production status of specific part numbers.
MAX6816/MAX6817/
MAX6818
±15kV ESD-Protected, Single/Dual/Octal,
CMOS Switch Debouncers
General Description
Benefits and Features
● Switch Debouncer Integration Simplifies System
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.
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
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.
- ±8kV—IEC 1000-4-2, Contact Discharge
- ±15kV—IEC 1000-4-2, Air-Gap Discharge
● Octal Version (MAX6818) Provides Direct Data
Bus Interface
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
controlled by an enable (EN) pin, and is pin-compatible
with the LS573 octal latch (except for the CH pin),
allowing easy interfacing to a digital data bus.
• Three-State Outputs for Directly Interfacing to
μP (MAX6818)
• Switch Change-of-State Output Simplifies Polling
and Interrupts (MAX6818)
• Pin-Compatible with ‘LS573 (MAX6818)
Ordering Information
SOT
PIN-
PACKAGE
PART
TEMP RANGE
TOP MARK
Applications
MAX6816EUS-T
MAX6817EUT-T
MAX6817MUT+T
-40°C to +125°C 4 SOT143
-40°C to +125°C 6 SOT23-6
-55°C to +125°C 6 SOT23
KABA
AAAU
AAAU
ACWB
—
● µP Switch Interfacing
● Industrial Instruments
● PC-Based Instruments
● Portable Instruments
● Membrane Keypads
MAX6817MUT/PR3+ -55°C to +125°C 6 SOT23
MAX6818EAP -40°C to +125°C 20 SSOP
Note: There is a minimum order increment of 2500 pieces for
SOT packages.
Typical Operating Circuit
Devices are available in both leaded and lead(Pb)-free/RoHS-
compliant packaging. Specify lead-free by replacing “-T” with
“+T” when ordering.
V
CC
MAX6816
µP
MECHANICAL
SWITCH
0.1µF
IN
OUT
RESET
DEBOUNCED
OUTPUT
GND
19-4770; Rev 8; 2/20