MAX6816 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – ±15kV ESD-Protected, Single/Dual/Octal, CMOS Switch Debouncers

19-4770; Rev 1; 1/99
±15kV ESD-Protected, Single/Dual/Octal,
CMOS Switch Debouncers
General Description
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 (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 CH pin),
allowing easy interfacing to a digital data bus.
µP Switch Interfacing
Industrial Instruments
PC-Based Instruments
Portable Instruments
Automotive Applications
Membrane Keypads
Applications
Typical Operating Circuit
V_CC
MAX6816
MECHANICAL
µP
SWITCH
0.1µF
Features
o Robust Inputs can Exceed Power Supplies
up to ±25V
o ESD Protection for Input Pins
±15kV—Human Body Model
±8kV—IEC 1000-4-2, Contact Discharge
±15kV—IEC 1000-4-2, Air-Gap Discharge
o Small SOT Packages (4 and 6 pins)
o Single-Supply Operation from +2.7V to +5.5V
o Single (MAX6816), Dual (MAX6817), and Octal
(MAX6818) Versions Available
o No External Components Required
o 6µA Supply Current
o Three-State Outputs for Directly Interfacing
Switches to µP Data Bus (MAX6818)
o Switch Change-of-State Output Simplifies
Polling and Interrupts (MAX6818)
o Pin-Compatible with ’LS573 (MAX6818)
Ordering Information
PART
TEMP. RANGE
PIN-
SOT
PACKAGE TOP MARK
MAX6816EUS-T -40°C to +85°C 4 SOT143
KABA
MAX6817EUT-T -40°C to +85°C 6 SOT23-6
AAAU
MAX6818EAP -40°C to +85°C 20 SSOP
—
Note: There is a minimum order increment of 2500 pieces for
SOT packages.
Pin Configurations
TOP VIEW
GND 1
MAX6816
4 VCC
IN
OUT
GND
DEBOUNCED
OUTPUT
RESET
IN 2
3 OUT
SOT143
Pin Configurations continued at end of data sheet.
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