MAX6710EUT+T - Maxim Integrated

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.

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.

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

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

● Open-Drain RESET Output with 10μA Internal Pullup

● 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

19-2324; Rev 5; 8/16

Pin Configuration appears at end of data sheet.

Selector Guide with top marks appears at end of data sheet.

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.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

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

MAX6700

MAX6710

IN1

IN2

IN3

IN4

RESET

GND

SUPPLIES

TO BE

MONITORED

µP

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

Typical Operating Circuit

Ordering Information

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

(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 CONDITIONS MIN TYP MAX UNITS

Operating Voltage Range

(Note 2)

VCC MAX6700/MAX6710Q 2.0 5.5

VIN2 All others (Note 3) TA = 0°C to +105°C 1.0 5.5

TA = -40°C to +105°C 1.2 5.5

Input Current IIN_

IN_ = nominal input voltage (for 1.8V, 2.5V, and

5.0V supplies) 25 45

µA

IN2 = nominal input voltage (for 3.0V and 3.3V

supplies) (Note 4) 55 115

VIN1 = 0 to 0.85V (for adjustable thresholds) 1

VIN3, VIN4 = 0 to 0.85V (for adjustable

thresholds) 0.2

ICC MAX6700/MAX6710Q only, VCC = 5.5V 35 65

Threshold Voltage VTH IN_ decreasing

5V (-5%) 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

1.8V (-10%) 1.53 1.58 1.62

Adjustable Threshold VTH IN_ decreasing 0.611 0.620 0.629 V

Reset Threshold Hysteresis VHYST IN_ increasing relative to IN_ decreasing 0.3 %VTH

Reset Threshold Temperature

Coefcient TCVTH 60 ppm/°C

IN_ to Reset Delay tRD VIN falling at 10mV/µs from VTH to (VTH - 50mV) 30 µs

Propagation Delay tPD MAX6700 only 5 µs

Reset Timeout Period tRP MAX6710 only 140 200 280 ms

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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Absolute Maximum Ratings

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)

Note 1: 100% production tested at TA = +25°C. Limits over temperature guaranteed by design.

Note 2: The devices are powered from IN2 or VCC (for MAX6700/MAX6710Q).

Note 3: The RESET output is guaranteed to be in the correct state for IN1 or IN2 down to 1V.

Note 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.

(VIN2 = VCC = 3.0V, TA = +25°C)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RESET Output Low VOL

VIN2, VCC = 5V, ISINK = 2mA 0.3

VVIN2, VCC = 2.5V, ISINK = 1.2mA 0.4

VIN2 = 1.0V, ISINK = 50µA, TA = 0°C to +105°C 0.3

RESET Output High VOH

VCC ≥ 2.0V, ISOURCE = 6µA, RESET

deasserted (MAX6700/MAX6710Q) 0.8 x VCC

VIN2 ≥ 2.0V, ISOURCE = 6µA, RESET

deasserted 0.8 x VIN2

RESET Output High Source

Current IOH VIN2 ≥ 2.0V, RESET deasserted 10 µA

0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

IN2 INPUT CURRENT vs. IN2 VOLTAGE

MAX6700 toc02

IN2 VOLTAGE (V)

IN2 INPUT CURRENT (µA)

-0.10

-0.04

-0.06

-0.08

-0.02

0.02

0.04

0.06

0.08

0.10

-40 -15 10 35 60 85

NORMALIZED THRESHOLD ERROR

vs. TEMPERATURE

MAX6700 toc03

TEMPERATURE (°C)

NORMALIZED THRESHOLD ERROR (%)

VTH = 1.8V

VIN2 = 3.3V

-40 -15 10 35 60 85

IN2 INPUT CURRENT vs. TEMPERATURE

MAX6700 toc01

TEMPERATURE (°C)

IN2 INPUT CURRENT (µA)

VIN2 = 3.3V

VIN2 = 3V

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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Electrical Characteristics (continued)

Typical Operating Characteristics

(VIN2 = VCC = 3.0V, TA = +25°C)

PIN NAME FUNCTION

1IN1 Input Voltage 1. See the Selector Guide for monitored voltages.

2IN2 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.

VCC

3 IN3 Input Voltage 3. See the Selector Guide for monitored voltages.

4IN4 Input Voltage 4. See the Selector Guide for monitored voltages.

5 GND Ground

6RESET

Active-Low, Reset Output. RESET goes low when any input goes below its specied 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.

100

0 200 300 400100 500 600 700 900800 1000

MAX6700 toc04

MAXIMUM IN_ TRANSIENT DURATION (µs)

RESET ASSERTED

ABOVE THIS LINE

RESET THRESHOLD OVERDRIVE (mV)

MAXIMUM IN_ TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

100

0 200 300 400100 500 600 700 900800 1000

MAX6700 toc05

RESET THRESHOLD OVERDRIVE (mV)

RESET DELAY vs. RESET THRESHOLD

OVERDRIVE (IN_ DECREASING)

RESET DELAY (µs)

IN_

100mV/div

AC-COUPLED

10µs/div

MAX6700 toc06

RESET PULLUP AND PULLDOWN

RESPONSE (CL = 47pF)

RESET

2V/div

220

222

221

223

224

225

226

227

228

229

230

231

232

MAX6700 toc07

TEMPERATURE (°C)

-40 10-15 35 60 85

RESET TIMEOUT DELAY

vs. TEMPERATURE

RESET TIMEOUT DELAY (µs)

2µs/div

MAX6700 toc08

RESET

2V/div

RESET PROPAGATION DELAY (MAX6700)

IN_

2V/div

40µs/div

MAX6700 toc09

RESET

2V/div

IN_

2V/div

RESET TIMEOUT DELAY (MAX6710)

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

Maxim Integrated

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Typical Operating Characteristics (continued)

Pin Description

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-to-

three 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/

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.

Figure 1. MAX6700 Functional Diagram

IN1

IN3

IN4

0.62V

REFERENCE

VCC

RESET

MAX6700

VCC

UVLO

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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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).

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.

Figure 2. MAX6710 Functional Diagram

IN1

(ADJ)

IN2, VCC

(3.3V/3V)

IN3

(2.5V/1.8V)

IN4

(ADJ)

0.62V

REFERENCE

NOR

GATE

TIME-

OUT

(200ms)

IN2, VCC

RESET

MAX6710

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)

UVLO

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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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.

Adjustable Thresholds

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:

R1 = R2 ((VINTH / 0.62V) - 1)

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.

Unused Inputs

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.

Adding Manual Reset Capability

(MAX6710)

Figure 6 shows an application circuit adding manual reset

to the MAX6710. Depressing the pushbutton switch short-

circuits 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 push-

button switch to the adjustable input.

Power-Supply Bypassing and Grounding

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.

Figure 3. RESET Output Timing Diagram

Figure 4. Interfacing to Different Logic-Supply Voltage

Figure 5. Setting the Auxiliary Monitor

VTH_

90%

10%

IN_

VTH_

RESET

tRP

tRD

IN2

GND

IN2 = +3.3V +5V

MAX6700

MAX6710

VCC

GND

RESET

100kΩ

VREF = 0.62V

VINTH

R1 = R2 ( - 1)

VINTH

0.62V

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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Figure 6. Adding Manual Reset Capability

IN1

IN2

IN3

MAX6710

GND

RESET

IN4

(ADJUSTABLE

INPUT)

(VCC) IN2

IN4IN3

1 6

5 GND

IN1

( ) ARE FOR MAX6700/MAX6710Q ONLY

MAX6700

MAX6710

SOT23

TOP VIEW

3 4

RESET

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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Pin Conguration

Chip Information

TRANSISTOR COUNT: 699

PROCESS: BiCMOS

*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.

PART**

(SUFFIX IN

BOLD)

TEMPERATURE

RANGE

Nominal Input Voltage Supply

Tolerance (%) Top Mark

IN1

(V)

IN2

(V)

IN3

(V)

IN4

(V)

MAX6700UT -40°C to +85°C Adj* VCC Adj* Adj* N/A ABEK

MAX6710AUT -40°C to +85°C 5 3.3 2.5 Adj* 10 AAZA

MAX6710BUT -40°C to +85°C 5 3.3 2.5 Adj* 5 AAZB

MAX6710CUT -40°C to +85°C 5 3.3 1.8 Adj* 10 AAZC

MAX6710DUT -40°C to +85°C 5 3.3 1.8 Adj* 5 AAZD

MAX6710EUT -40°C to +85°C Adj* 3.3 2.5 1.8 10 AAZE

MAX6710FUT -40°C to +105°C Adj* 3.3 2.5 1.8 5 AAZF

MAX6710GUT -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

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

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

6 SOT U6+1 21-0058 90-0175

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

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Selector Guide

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.

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

39/14 Added ordering information for F option, added extended temperature range

information, updated Selector Guide and Package Information sections 1, 2, 8, 9

411/15 Added MAX6710K with new limits 1, 2, 9

5 8/16 Updated MAX6710 upper operating temperature range and EC limits to 105°C 2–3

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 specications 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.

MAX6700/MAX6710 Low-Voltage, High-Accuracy, Triple/Quad

Voltage μP Supervisory Circuits in SOT Package

│

Revision History

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MAX6700UT+T MAX6710AUT+T MAX6710BUT+T MAX6710CUT+T MAX6710DUT+T MAX6710EUT+T

MAX6710FUT+T MAX6710GUT+T MAX6710HUT+T MAX6710IUT+T MAX6710JUT+T MAX6710KUT+T

MAX6710LUT+T MAX6710MUT+T MAX6710NUT+T MAX6710OUT+T MAX6710PUT+T MAX6710QUT+T

MAX6710IUT-T