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PDF MAX6700-MAX6710 Data sheet ( Hoja de datos )
| Número de pieza | MAX6700-MAX6710 | |
| Descripción | Low-Voltage / High-Accuracy / Triple/Quad Voltage P Supervisory Circuits in SOT Package | |
| Fabricantes | Maxim Integrated | |
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19-2324; Rev 1; 4/02
Low-Voltage, High-Accuracy, Triple/Quad
Voltage µP Supervisory Circuits in SOT Package
General Description
The MAX6700/MAX6710 precision triple/quad voltage
microprocessor (µP) supervisory circuits monitor up to
four system-supply voltages and assert a single reset if
any supply voltage drops below its preset threshold.
These devices significantly reduce system size and com-
ponent count while improving reliability compared to sep-
arate 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 MAX6710 includes internally fixed options for moni-
toring 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V supplies with -5%
or -10% tolerances. The MAX6710 is also available with
one to three adjustable threshold options to monitor volt-
ages down to 0.62V. The MAX6700 monitors three volt-
ages with adjustable thresholds down to 0.62V.
A single active-low output asserts when any monitored
input falls below its associated threshold. The open-drain
output has a weak internal pullup (10µA) to IN2. For the
MAX6710, reset remains low for the reset timeout period
(140ms min) after all voltages rise above the selected
threshold. The MAX6700 acts as a voltage detector with a
propagation delay of 5µs after all monitored voltages
exceed their thresholds. The output remains valid as long
as either IN2 or IN2 input voltage remains above 1V
(MAX6710) or VCC is above 2V (MAX6700/MAX6710Q).
The MAX6700/MAX6710 are available in a small 6-pin
SOT23 package and operate over the extended (-40°C to
+85°C) temperature range.
________________________Applications
Telecommunications
High-End Printers
Desktop and Notebook Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
Servers/Workstations
Selector Guide with Top marks appears at end of data sheet.
Pin Configuration appears at end of data sheet.
Features
o Monitor Up to 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 5µs Propagation Delay (MAX6700)
o 140ms (min) Reset Timeout Period (MAX6710)
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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX6700UT-T
-40°C to +85°C
6 SOT23-6
MAX6710_UT-T
-40°C to +85°C
6 SOT23-6
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. These
devices are available in tape-and-reel only.
Typical Operating Circuit
SUPPLIES
TO BE
MONITORED
IN1
MAX6700
MAX6710
IN2
RESET
IN3
IN4
GND
µP
________________________________________________________________ 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.
1 page  
Low-Voltage, High-Accuracy, Triple/Quad
Voltage µP Supervisory Circuits in SOT Package
VCC
VCC
IN1
VCC
IN3
MAX6700
VCC
RESET
VCC
IN4
UVLO
0.62V
REFERENCE
Figure 1. MAX6700 Functional Diagram
Detailed Description
The MAX6700/MAX6710 are very small, low-power,
triple/quad voltage µP supervisory circuits designed to
maintain system integrity in multisupply systems
(Figures 1 and 2). The MAX6710 offers several internally
trimmed undervoltage threshold options for monitoring
5.0V, 3.3V, 3.0V, 2.5V, and 1.8V supplies. The
MAX6700/MAX6710 offer one to three adjustable thresh-
olds for monitoring voltages down to 0.62V.
The triple/quad voltage monitors include an accurate
bandgap reference, precision comparators, and a series
of internally trimmed resistor-divider networks to set the
factory-fixed reset threshold options. The resistor net-
works scale the specified IN_ reset voltages to match the
internal bandgap reference/comparator voltage.
Adjustable threshold options bypass the internal resistor
networks and connect directly to one of the comparator
inputs (use an external resistor-divider network for
threshold matching). The MAX6700/MAX6710Q provide
a separate unmonitored power-supply input (VCC) and
three adjustable voltage inputs.
Each of the internal comparators has a typical hysteresis
of 0.3% with respect to its reset threshold. This built-in
hysteresis improves the monitor’s immunity to ambient
noise without significantly reducing threshold accuracy.
The MAX6700/MAX6710 are immune to short IN_ tran-
sients. See Typical Operating Characteristics for a glitch
immunity graph.
_______________________________________________________________________________________ 5
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