The MAX6339 is a precision quad voltage monitor with
microprocessor (µP) supervisory reset timing. The device
can monitor up to four system supply voltages without
any external components and asserts a single reset if any
supply voltage drops below its preset threshold. The
device significantly reduces system size and component
count while improving reliability compared to separate
ICs or discrete components.
A variety of factory-trimmed threshold voltages are available
to accommodate different supply voltages and tolerances
with minimal external component requirements.
The selection includes internally fixed options for monitoring
+5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V supplies
with -5% and/or -10% tolerances. The device is also
available with one or two user-adjustable threshold
options if non-standard thresholds are desired (use external
resistor-divider network).
The quad monitor provides a single active-low reset output
that is asserted when any monitored input is below its
associated threshold. The output is open drain with a
weak internal pullup (10µA) to IN2. Reset remains low for
a reset timeout period (140ms min) after all voltages are
above the selected thresholds. The output is valid as long
as either the IN1 or IN2 input voltage remains > 1V.
The MAX6339 is available in a small 6-pin SOT23 package
and operates over the extended (-40°C to +85°C)
temperature range.
Key Features
Applications/Uses
Monitors Four Power-Supply Voltages
Precision Factory-Set Reset Threshold Options
for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V
Supplies
User-Adjustable Voltage Monitoring Threshold
Options
Low 55µA Supply Current
Open-Drain active-low RESET Output with 10µA Internal
Pullup
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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