MAX6700/MAX6710
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
component count while improving reliability compared to
separate ICs or discrete components.
Features
●● Monitor Up to Four Power-Supply Voltages
●● Precision Factory-Set Reset Threshold Options for
5.0V, 3.3V, 3.0V, 2.5V, and 1.8V Supplies
●● Adjustable Voltage Threshold Monitors Down to
0.62V with 1.5% Accuracy
●● Low 35μA Supply Current
A variety of factory-trimmed threshold voltages are available
to accommodate different supply voltages and tolerances with
minimal external component requirements. The MAX6710
includes internally fixed options for monitoring 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 voltages down to 0.62V. The
MAX6700 monitors three voltages with adjustable thresholds
down to 0.62V.
●● Open-Drain RESET Output with 10μA Internal Pullup
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).
Ordering Information
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.
19-2324; Rev 5; 8/16
●● 5μs Propagation Delay (MAX6700)
●● 140ms (min) Reset Timeout Period (MAX6710)
●● RESET Valid to IN1 = 1V or IN2 = 1V
●● Immune to Short Monitored Supply Transients
●● Guaranteed from -40°C to +85°C
●● Small 6-Pin SOT23 Package
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
MAX6710FUT-T
-40°C to +105°C
6 SOT23-6
MAX6710KUT-T
-40°C to +105°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 minimum order increment requirement on the SOT package. These
devices are available in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Typical Operating Circuit
IN1
SUPPLIES
TO BE
MONITORED
MAX6700
MAX6710
IN2
RESET
IN3
IN4
GND
µP
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Absolute Maximum Ratings
VCC, IN_, RESET to GND........................................-0.3V to +6V
Continuous RESET Current................................................20mA
Continuous Power Dissipation
6-Pin SOT23 (derate 8.7mW/°C above +70°C)........695.7mW
Operating Temperature Range.......................... -40°C to +105°C
Storage Temperature Range............................. -65°C to +150°C
Junction Temperature.......................................................+150°C
Lead Temperature (soldering, 10s).................................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VIN2 = 1V to 5.5V, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VIN2 = 3.0V to 3.3V, TA = +25°C.) (Note 1)
PARAMETER
Operating Voltage Range
(Note 2)
Input Current
SYMBOL
MAX6700/MAX6710Q
VIN2
All others (Note 3)
IIN_
VTH
VTH
Reset Threshold Hysteresis
VHYST
Reset Threshold Temperature
Coefficient
TCVTH
MAX
5.5
TA = 0°C to +105°C
1.0
5.5
TA = -40°C to +105°C
1.2
5.5
IN_ = nominal input voltage (for 1.8V, 2.5V, and
5.0V supplies)
25
45
IN2 = nominal input voltage (for 3.0V and 3.3V
supplies) (Note 4)
55
115
1
VIN3, VIN4 = 0 to 0.85V (for adjustable
thresholds)
MAX6700/MAX6710Q only, VCC = 5.5V
IN_ decreasing
35
65
4.50
4.63
4.75
5V (-10%)
4.25
4.38
4.50
3.3V (-5%)
3.00
3.08
3.15
3.3V (-10%)
2.85
2.93
3.00
3.0V (-5%)
2.70
2.78
2.85
3.0V (-10%)
2.55
2.63
2.70
2.5V (-5%)
2.25
2.32
2.38
2.5V (-10%)
2.13
2.19
2.25
1.8V (-5%)
1.62
1.67
1.71
IN_ decreasing
1.53
1.58
1.62
0.611
0.620
0.629
IN_ increasing relative to IN_ decreasing
tRD
VIN falling at 10mV/µs from VTH to (VTH - 50mV)
Propagation Delay
tPD
MAX6700 only
Reset Timeout Period
tRP
MAX6710 only
UNITS
V
µA
0.2
5V (-5%)
IN_ to Reset Delay
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TYP
2.0
1.8V (-10%)
Adjustable Threshold
MIN
VIN1 = 0 to 0.85V (for adjustable thresholds)
ICC
Threshold Voltage
CONDITIONS
VCC
V
0.3
%VTH
60
ppm/°C
30
µs
5
140
V
200
µs
280
ms
Maxim Integrated │ 2
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Electrical Characteristics (continued)
(VIN2 = 1V to 5.5V, TA = -40°C to +105°C, unless otherwise noted. Typical values are at VIN2 = 3.0V to 3.3V, TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
RESET Output Low
VOL
RESET Output High
VOH
RESET Output High Source
Current
Note
Note
Note
Note
IOH
CONDITIONS
MIN
TYP
MAX
VIN2, VCC = 5V, ISINK = 2mA
0.3
VIN2, VCC = 2.5V, ISINK = 1.2mA
0.4
VIN2 = 1.0V, ISINK = 50µA, TA = 0°C to +105°C
0.3
VCC ≥ 2.0V, ISOURCE = 6µA, RESET
deasserted (MAX6700/MAX6710Q)
0.8 x VCC
VIN2 ≥ 2.0V, ISOURCE = 6µA, RESET
deasserted
0.8 x VIN2
VIN2 ≥ 2.0V, RESET deasserted
UNITS
V
V
10
µA
1: 100% production tested at TA = +25°C. Limits over temperature guaranteed by design.
2: The devices are powered from IN2 or VCC (for MAX6700/MAX6710Q).
3: The RESET output is guaranteed to be in the correct state for IN1 or IN2 down to 1V.
4: Monitored IN2 voltage (3.3V, 3.0V) is also the device power supply. Supply current splits as follows: 25μA for the resistor
divider (for the monitored voltage) and 30μA for other circuits.
Typical Operating Characteristics
(VIN2 = VCC = 3.0V, TA = +25°C)
VIN2 = 3.3V
52
50
48
VIN2 = 3V
46
44
60
50
40
30
20
42
10
40
0
-40
-15
10
35
TEMPERATURE (°C)
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60
85
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
IN2 VOLTAGE (V)
0.08
NORMALIZED THRESHOLD ERROR
vs. TEMPERATURE
MAX6700 toc03
70
0.10
NORMALIZED THRESHOLD ERROR (%)
54
80
IN2 INPUT CURRENT (µA)
56
IN2 INPUT CURRENT vs. IN2 VOLTAGE
MAX6700 toc02
58
IN2 INPUT CURRENT (µA)
90
MAX6700 toc01
60
IN2 INPUT CURRENT vs. TEMPERATURE
VIN2 = 3.3V
0.06
0.04
VTH = 1.8V
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
-40
-15
10
35
60
85
TEMPERATURE (°C)
Maxim Integrated │ 3
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Typical Operating Characteristics (continued)
(VIN2 = VCC = 3.0V, TA = +25°C)
MAX6700 toc04
90
80
90
80
70
50
RESET ASSERTED
ABOVE THIS LINE
40
30
IN_
100mV/div
AC-COUPLED
50
40
20
10
0 100 200 300 400 500 600 700 800 900 1000
RESET
2V/div
30
10
0
0 100 200 300 400 500 600 700 800 900 1000
RESET THRESHOLD OVERDRIVE (mV)
RESET THRESHOLD OVERDRIVE (mV)
RESET TIMEOUT DELAY
vs. TEMPERATURE
RESET PROPAGATION DELAY (MAX6700)
225
224
223
-40
-15
10
35
60
85
10µs/div
RESET TIMEOUT DELAY (MAX6710)
MAX6700 toc08
MAX6700 toc07
230
229
228
227
226
222
221
220
MAX6700 toc06
60
20
0
RESET PULLUP AND PULLDOWN
RESPONSE (CL = 47pF)
70
60
232
231
RESET TIMEOUT DELAY (µs)
100
RESET DELAY (µs)
MAXIMUM IN_ TRANSIENT DURATION (µs)
100
RESET DELAY vs. RESET THRESHOLD
OVERDRIVE (IN_ DECREASING)
MAX6700 toc05
MAXIMUM IN_ TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6700 toc09
IN_
2V/div
IN_
2V/div
RESET
2V/div
RESET
2V/div
2µs/div
40µs/div
TEMPERATURE (°C)
Pin Description
PIN
NAME
1
IN1
Input Voltage 1. See the Selector Guide for monitored voltages.
IN2
VCC
Input Voltage 2. See the Selector Guide for monitored voltages. IN2 is the power-supply input for the device.
For the MAX6700/MAX6710Q, VCC is the power-supply input for the device and is not a monitored voltage.
3
IN3
Input Voltage 3. See the Selector Guide for monitored voltages.
4
IN4
Input Voltage 4. See the Selector Guide for monitored voltages.
5
GND
6
RESET
2
FUNCTION
Ground
Active-Low, Reset Output. RESET goes low when any input goes below its specified threshold. After all
inputs rise above their threshold voltage, RESET remains low for 5µs (MAX6700) or for 200ms (MAX6710)
before going high. The open-drain RESET output has a weak (10µA) internal pullup to IN2 or VCC.
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Maxim Integrated │ 4
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
VCC
VCC
IN1
MAX6700
VCC
VCC
IN3
RESET
UVLO
VCC
IN4
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 (Figure 1 and
Figure 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 devices offer one-tothree adjustable thresholds 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 networks scale the specified
IN_ reset voltages to match the internal bandgap reference/
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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 devices are immune to short IN_ transients. See the
Typical Operating Characteristics for a glitch immunity
graph.
Maxim Integrated │ 5
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
ALL DEVICES ARE POWERED FROM IN2, VCC (3.0V/3.3V). RESET IS VALID IF VIN1 OR VIN2 IS GREATER THAN 1V, OR IF VCC IS GREATER THAN 2V (MAX6710Q ONLY)
IN1
(ADJ)
MAX6710
IN2, VCC
(3.3V/3V)
IN2, VCC
TIMEOUT
(200ms)
NOR
GATE
RESET
IN3
(2.5V/1.8V)
UVLO
IN4
(ADJ)
0.62V
REFERENCE
Figure 2. MAX6710 Functional Diagram
Applications Information
Reset Output
The MAX6700 RESET output asserts low when any
monitored IN_ voltage drops below its specified reset
threshold and remains low for the propagation delay (5μs) after
all inputs exceed their thresholds (Figure 3). The MAX6710
provides an extended reset timeout period of 140ms (min).
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The output is open drain with a weak internal pullup to
the monitored IN2 or VCC supply (10μA typ). For many
applications no external pullup resistor is required to interface
with other logic devices. An external pullup resistor to any
voltage from 0 to 5.5V can overdrive the internal pullup if
interfacing to different logic-supply voltages (Figure 4). Internal
circuitry prevents reverse current flow from the external pullup
voltage to IN2.
Maxim Integrated │ 6
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
IN_
VTH_
VCC powers the MAX6700/MAX6710Q and is not a
monitored voltage. IN2 powers all other options for the
MAX6710 and is a monitored voltage. When any supply
drops below its threshold, the reset output asserts low
and remains low while either IN1 or IN2 is above 1.0V.
VTH_
Adjustable Thresholds
RESET
90%
10%
tRP
tRD
Figure 3. RESET Output Timing Diagram
The MAX6700/MAX6710 offer several monitor options
with adjustable reset thresholds. The threshold voltage at
each adjustable IN_ input is typically 0.62V. To monitor a
voltage > 0.62V, connect a resistor-divider network to the
circuit as shown in Figure 5.
VINTH = 0.62V x (R1 + R2) / R2
or, solved in terms of R1:
IN2 = +3.3V
+5V
R1 = R2 ((VINTH / 0.62V) - 1)
VCC
Because the devices have a guaranteed input current of
±0.2μA (±0.4μA for IN1) on their adjustable inputs, resistor
values up to 100kΩ can be used for R2 with < 1% error.
The MAX6700/MAX6710Q include an internal voltage
clamp (1.5V typ) at each of the adjustable voltage inputs.
An input voltage higher than 1.5V induces a higher input
current.
100kΩ
IN2
RESET
RESET
Unused Inputs
MAX6700
MAX6710
GND
GND
Figure 4. Interfacing to Different Logic-Supply Voltage
Adding Manual Reset Capability
(MAX6710)
Figure 6 shows an application circuit adding manual reset
to the MAX6710. Depressing the pushbutton switch shortcircuits the analog input to ground and initiates a RESET
pulse. The switch must be open for at least 140ms in
order to deassert the RESET output. No external switch
debounce is required. Use a small capacitor to improve
noise immunity when using long leads from the pushbutton switch to the adjustable input.
VINTH
R1
R2
Power-Supply Bypassing and Grounding
VREF = 0.62V
R1 = R2
Figure 5. Setting the Auxiliary Monitor
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Connect unused monitor inputs to a supply voltage
greater in magnitude than their specified threshold
voltages. For unused IN_ adjustable inputs, connect a
1MΩ series resistor between the unused input and IN2
(or VCC) to limit the bias current. Use IN2 for normal
operation (device power-supply pin). Do not connect
unused monitor inputs to ground or allow them to float.
VINTH
- 1)
( 0.62V
The MAX6700/MAX6710 are normally powered from the
monitored IN2 or from the VCC supply input. All monitored
inputs are immune to short supply transients. For higher
immunity in noisy applications, connect a 0.1μF bypass
capacitor from the IN2 input to ground. Add capacitance
to IN1, IN3, and IN4 to increase their noise immunity.
Maxim Integrated │ 7
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Pin Configuration
IN1
IN2
MAX6710
TOP VIEW
IN3
IN1 1
RESET
R1
IN4
(ADJUSTABLE
INPUT)
R2
(VCC) IN2 2
MAX6700
MAX6710
IN3 3
GND
6
RESET
5
GND
4
IN4
SOT23
( ) ARE FOR MAX6700/MAX6710Q ONLY
Figure 6. Adding Manual Reset Capability
Chip Information
TRANSISTOR COUNT: 699
PROCESS: BiCMOS
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Maxim Integrated │ 8
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Selector Guide
PART**
(SUFFIX IN
BOLD)
TEMPERATURE
RANGE
MAX6700UT
Nominal Input Voltage
Supply
Tolerance (%)
Top Mark
Adj*
N/A
ABEK
2.5
Adj*
10
AAZA
2.5
Adj*
5
AAZB
3.3
1.8
Adj*
10
AAZC
3.3
1.8
Adj*
5
AAZD
Adj*
3.3
2.5
1.8
10
AAZE
Adj*
3.3
2.5
1.8
5
AAZF
-40°C to +85°C
5
3.3
Adj*
Adj*
10
AAZG
MAX6710HUT
-40°C to +85°C
5
3.3
Adj*
Adj*
5
AAZH
IN1
(V)
IN2
(V)
IN3
(V)
IN4
(V)
-40°C to +85°C
Adj*
Adj*
MAX6710AUT
-40°C to +85°C
5
VCC
3.3
MAX6710BUT
-40°C to +85°C
5
3.3
MAX6710CUT
-40°C to +85°C
5
MAX6710DUT
-40°C to +85°C
5
MAX6710EUT
-40°C to +85°C
MAX6710FUT
-40°C to +105°C
MAX6710GUT
MAX6710IUT
-40°C to +85°C
Adj*
3.3
2.5
Adj*
10
AAZI
MAX6710JUT
-40°C to +85°C
Adj*
3.3
2.5
Adj*
5
AAZJ
MAX6710KUT
-40°C to +105°C
Adj*
3.3
1.8
Adj*
10
AAZK
MAX6710LUT
-40°C to +85°C
Adj*
3.3
1.8
Adj*
5
AAZL
MAX6710MUT
-40°C to +85°C
Adj*
3
2.5
Adj*
10
AAZM
MAX6710NUT
-40°C to +85°C
Adj*
3
2.5
Adj*
5
AAZN
MAX6710OUT
-40°C to +85°C
Adj*
3
1.8
Adj*
10
AAZO
MAX6710PUT
-40°C to +85°C
Adj*
3
1.8
Adj*
5
AAZP
MAX6710QUT
-40°C to +85°C
Adj*
VCC
Adj*
Adj*
N/A
AAZQ
*Adjustable voltage based on 0.62V internal threshold. External threshold voltage can be set using an external resistor-divider.
**The MAX6700 acts as a voltage detector with a 5μs propagation delay. The MAX6710 serves as a microprocessor reset circuit with
a 140ms (min) reset timeout.
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
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PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
6 SOT
U6+1
21-0058
90-0175
Maxim Integrated │ 9
MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage μP Supervisory Circuits in SOT Package
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
3
9/14
Added ordering information for F option, added extended temperature range
information, updated Selector Guide and Package Information sections
4
11/15
Added MAX6710K with new limits
5
8/16
Updated MAX6710 upper operating temperature range and EC limits to 105°C
DESCRIPTION
1, 2, 8, 9
1, 2, 9
2–3
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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