19-2324; Rev 0; 1/02
Low-Voltage, High-Accuracy, Quad-Voltage
µP Supervisory Circuit in SOT Package
General Description
The MAX6710 precision quad-voltage monitor with micro-
processor (µP) supervisory reset timing monitors up to
four system-supply voltages 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 avail-
able to accommodate different supply voltages and toler-
ances with minimal external component requirements.
The selection includes internally fixed options for monitor-
ing 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V supplies with -5% or
-10% tolerances. The device is also available with one to
three adjustable threshold options to monitor voltages
down to 0.62V.
A single active-low reset output asserts when any moni-
tored 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 volt-
age remains >1V.
The MAX6710 is available in a small 6-pin SOT23 pack-
age and operates over the extended (-40°C to +85°C)
temperature range.
Features
o
Monitors Four Power-Supply Voltages
o
Precision Factory-Set Reset Threshold Options
for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V Supplies
o
Adjustable Voltage Threshold Monitors Down to
0.62V with 1.5% Accuracy
o
Low 35µA Supply Current
o
Open-Drain
RESET
Output with 10µA Internal
Pullup
o
140ms (min) Reset Timeout Period
o
RESET
Valid to IN1 = 1V or IN2 = 1V
o
Immune to Short Monitored Supply Transients
o
Guaranteed from -40°C to +85°C
o
Small 6-Pin SOT23 Package
MAX6710
Ordering Information
PART
MAX6710_UT-T*
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
________________________Applications
Telecommunications
High-End Printers
Desktop and Network Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
*Insert
the desired suffix letter from the Selector Guide into the
blank to complete the part number. There is a 2500 piece mini-
mum order increment requirement on the SOT package and
these devices are available in tape-and-reel only.
Typical Operating Circuit
IN1
SUPPLIES
TO BE
MONITORED
IN2
IN3
IN4
MAX6710
µP
RESET
Selector Guide appears at end of data sheet.
Pin Configuration appears at end of data sheet.
GND
________________________________________________________________
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.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
