MAXIM MAX6701A Technical data

General Description

The MAX6701–MAX6708 microprocessor (µP) supervisory
circuits reduce the complexity and components required
to monitor power-supply functions in µP systems. These
devices significantly improve system reliability and accu­racy compared to separate ICs or discrete components.

The MAX6701–MAX6708 family provides four functions:
a reset output during power-up, power-down, and
brownout conditions; an independent watchdog output
that goes low if the watchdog input has not been toggled
within 1.6s; a 0.62V threshold detector for power-fail
warning; and an active-low manual reset input.

The MAX6701–MAX6708 family offers several pinout
options to accommodate a variety of multivoltage micro­processor supervision applications.

The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor
three supply voltages (one fixed threshold and two
adjustable) to drive a single reset output and include a
manual reset input and a watchdog timer with an inde­pendent output. The MAX6704 monitors a single-supply
voltage to drive complementary reset outputs and
includes an independent adjustable power-fail-in/power­fail-out comparator, a manual reset input, and a reset­based watchdog timer. The MAX6705(A)/MAX6706(A)/
MAX6707(A) monitor a single-supply voltage to drive a
single reset output and include an independent
adjustable power-fail-in/power-fail-out comparator, a
manual reset input, and a watchdog timer with an inde­pendent output. The MAX6708 is the same as the
MAX6704 but without the watchdog timer function.

See the Detailed Description for differences between
non-A and A versions.

Applications

Computers

Controllers

Intelligent Instruments

Automotive Systems

Critical µP Power Monitoring

White Goods

Networking

Telecommunications

Features

♦ Small 8-Pin SOT23 Package
♦ Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V

Supply Voltages

♦ 140ms Reset Timeout Delay
♦ Power-Fail Input with Independent Output;

Monitor Inputs Down to 0.62V (MAX6704–MAX6708)

♦ Dual Adjustable Reset Input for Triple-Voltage

Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A))

♦ 1.6s Watchdog Timeout Period

(MAX6701(A)–MAX6707(A))

♦ Independent Watchdog Output

(MAX6701(A)/MAX6702(A)/MAX6703(A)/
MAX6705(A)/MAX6706(A)/MAX6707(A))

♦ Manual Reset Input
♦ Four Reset Output Stage Options

Active Low Push-Pull (MAX6701(A), MAX6705(A))
Active Low Open Drain (MAX6703(A), MAX6707(A))
Active High Push-Pull (MAX6702(A), MAX6706(A))
Dual Active Low/High Push-Pull (MAX6704,
MAX6708)

♦ Guaranteed Reset Valid to V

CC

= 1V

♦ Immune to Short Falling V

CC

Transients

♦ Low Cost, Few External Components

MAX6701–08/MAX6701A–03A/05A–07A

Low-Voltage, SOT23 µP Supervisors with Power-

Fail In/Out, Manual Reset, and Watchdog Timer

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

Ordering Information

19-1952; Rev 2; 8/03

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.

Insert the desired suffix letter (from the Threshold Suffix Guide
table) into the blank to complete the part number. All devices
must be ordered in increments of 2500 pieces. Sample stock is
typically held on standard versions only. Contact factory for
availability.

Ordering Information continued at end of data sheet.

Typical Operating Circuit and Selector Guide appear at end
of data sheet.

Pin Configurations continued at end of data sheet.

查询MAX6701供应商

PART TEMP RANGE PIN-PACKAGE

MAX6701_KA-T -40°C to +125°C 8 SOT23-8

MAX6701A_KA-T -40°C to +125°C 8 SOT23-8

TOP VIEW

MR

GND

1

2

CC

3

4

MAX6701(A)
MAX6702(A)
MAX6703(A)

87WDO

RESET (RESET)V

WDI

6

RST_IN2RST_IN1

5

( ) ARE FOR MAX6702(A) ONLY.

SOT23

MAX6701–08/MAX6701A–03A/05A–07A

Low-Voltage, SOT23 µP Supervisors with Power­Fail In/Out, Manual Reset, and Watchdog Timer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +4.25V to +5.5V for L/M versions, VCC= +2.55V to +3.6V for the T/S/R versions, VCC= +2.1V to +2.75V for the Z/Y versions.
T

A

= -40°C to +125°C, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

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.

VCC........................................................................-0.3V to +6.0V

Open-Drain RESET, WDO, PFO ...........................-0.3V to +6.0V

Push-Pull RESET, RESET, WDO, PFO ........-0.3V to (V

CC

+ 0.3V)

MR, WDI, PFI, RST_IN1, RST_IN2 ..............-0.3V to (V

CC

+ 0.3V)

Input Current (V

CC

).............................................................20mA

Output Current (RESET, RESET, PFO, WDO) .....................20mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Voltage Range V

Supply Current
MR Unconnected

VCC Reset Threshold

falling)

(V

CC

I

CC

V

Reset Threshold
Temperature Coefficient

VCC to Reset Output Delay VCC falling at 10mV/µs 12 µs

Reset Timeout Period t

VCC Falling to WDO Delay

PFI, RST_IN1, RST_IN2
Threshold

PFI Hysteresis 6mV

∆V

RP

TA = 0°C to +125°C 1.0 5.5

CC

TA = -40°C to +125°C 1.2 5.5

VCC < 5.5V, no load 12 25

VCC < 3.6V, no load 9 20

VCC < 3.6V, no load (MAX6708 only) 6 20

MAX670_L/MAX670_AL

M AX 670_M /M AX 670_AM

MAX670_T/MAX670_AT

MAX670_S/MAX670_AS

TH

MAX670_R/MAX670_AR

MAX670_Z/MAX670_AZ

MAX670_Y/MAX670_AY

TH

M AX 6701( A) /M AX 6702( A) /M AX 6703( A) /M AX 6705( A) /
M AX 6706( A) /M AX 6707( A)

= 1.8V to 5.5V

V

C C

TA = -40°C to +85°C 4.50 4.63 4.75

= -40°C to +125°C 4.47 4.78

T

A

TA = -40°C to +85°C 4.25 4.38 4.50

= -40°C to +125°C 4.22 4.53

T

A

TA = -40°C to +85°C 3.00 3.08 3.15

= -40°C to +125°C 2.97 3.17

T

A

TA = -40°C to +85°C 2.85 2.93 3.00

= -40°C to +125°C 2.83 3.02

T

A

TA = -40°C to +85°C 2.55 2.63 2.70

= -40°C to +125°C 2.53 2.72

T

A

TA = -40°C to +85°C 2.25 2.32 2.38

= -40°C to +125°C 2.24 2.40

T

A

TA = -40°C to +85°C 2.12 2.19 2.25

= -40°C to +125°C 2.11 2.27

T

A

TA = -40°C to +85°C 140 200 280

TA = -40°C to +125°C 120 300

TA = -40°C to +85°C 602 618 634

= -40°C to +125°C 593 642

T

A

V

µA

V

60 ppm/°C

ms

5µs

mV

MAX6701–08/MAX6701A–03A/05A–07A

Low-Voltage, SOT23 µP Supervisors with Power-

Fail In/Out, Manual Reset, and Watchdog Timer

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +4.25V to +5.5V for L/M versions, VCC= +2.55V to +3.6V for the T/S/R versions, VCC= +2.1V to +2.75V for the Z/Y versions.
T

A

= -40°C to +125°C, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

Note 1: Over-temperature limits are guaranteed by design and not production tested. Devices are tested at T

A

= +25°C.

Note 2: Guaranteed by design. Not production tested.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

PFI, RST_IN1, RST_IN2
Leakage Current

PFI to PFO Delay t

MR Input Voltage

(Note 2)

PF

V

IL

V

IH

TA = -40°C to +85°C

T

= -40°C to +125°C

A

-50

-200

0.7 x V

+50

+200

nA

1µs

0.3 x V

CC

CC

V

MR Minimum Input Pulse 1µs
MR Glitch Rejection 100 ns
MR to Reset Delay t

VCC Rising to WDO Delay

MD

MAX6701(A)/MAX6702(A)/MAX6703(A)/
MAX6705(A)/MAX6706(A)/MAX6707(A)

200 ns

100 ns

MR Pullup Resistance 25 50 75 kΩ

Watchdog Timeout Period t

WDI Pulse Width t

WDI Input Voltage

WDI Input Current I

RESET, WDO Output Low
(Push-Pull or Open Drain)

PFO Output Low
(Push-Pull or Open Drain)

RESET, WDO, PFO Output
High (Push-Pull Only)

WDI

V

V

WDI

V

V

V

WD

OH

TA = -40°C to +85°C 1.12 1.6 2.4

TA = -40°C to +125°C 0.96 2.52

(Note 2) 50 ns

IL

IH

OL

OL

WDI = 0V or V

VCC ≥ 1.0V, I
(T

= 0°C to +125°C)

A

VCC ≥ 1.2V, I

V

≥ 2.55V , I

C C

V

≥ 4.25V , I

C C

V

≥ 1.80V , I

C C

V

≥ 2.55V , I

C C

V

≥ 4.25V , I

C C

V

≥ 2.7V , I

C C

V

≥ 4.75V , I

C C

CC

= 50µA, output asserted

SINK

= 100µA, output asserted 0.3

SINK

= 1.2m A, outp ut asser ted 0.3

S IN K

= 3.2m A, outp ut asser ted 0.4

S IN K

= 200µA, outp ut asser ted 0.3

S IN K

= 1.2m A, outp ut asser ted 0.3

S IN K

= 3.2m A, outp ut asser ted 0.4

S IN K

= 500µA, outp ut not asser ted 0.8 x V

S OU RC E

= 800µA, outp ut not asser ted 0.8 x V

S OU RC E

0.7 x V

CC

-1 +1 µA

CC

CC

0.3 x V

0.3

CC

s

V

V

V

V

RESET, WDO, PFO Output
Open-Drain Leakage

I

LKG

VCC > VTH, output not asserted 1.0 µA

Current

RESET Output High
(Push-Pull Only)

RESET Output Low
(Push-Pull Only)

VCC ≥ 1.0V, I
(T

= 0°C to +125°C)

A

V

OH

VCC ≥ 1.2V, I

VCC ≥ 2.55V, I

VCC ≥ 4.25V, I

OL

VCC ≥ 2.7V, I

VCC ≥ 4.75V, I

V

= 1µA, reset asserted

SOURCE

= 50µA, reset asserted 0.8 x V

SOURCE

= 500µA, reset asserted 0.8 x V

SOURCE

= 800µA, reset asserted 0.8 x V

SOURCE

= 1.2mA, reset not asserted 0.3

SINK

= 3.2mA, reset not asserted 0.4

SINK

0.8 x V

CC

CC

CC

CC

V

V

MAX6701–08/MAX6701A–03A/05A–07A

Low-Voltage, SOT23 µP Supervisors with Power­Fail In/Out, Manual Reset, and Watchdog Timer

4 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

4

12

8

16

20

-40 10-15 35 60 85

SUPPLY CURRENT vs. TEMPERATURE

MAX6701 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = 5V

VCC = 3.3V

MAX6705(A)

MAX6708

210

205

200

195

190

-40 10-15 35 60 85

RESET TIMEOUT PERIOD

vs. TEMPERATURE

MAX6701 toc02

TEMPERATURE (°C)

RESET TIMEOUT PERIOD (ms)

20

15

10

5

0

-40 10-15 356085

VCC TO RESET OUTPUT DELAY

vs. TEMPERATURE

MAX6701 toc03

TEMPERATURE (°C)

V

CC

TO RESET OUTPUT DELAY (µs)

1.70

1.65

1.60

1.55

1.50

-40 10-15 35 60 85

WATCHDOG TIMEOUT PERIOD

vs. TEMPERATURE

MAX6701 toc04

TEMPERATURE (°C)

WATCHDOG TIMEOUT PERIOD (s)

0.95

0.98

0.97

0.96

0.99

1.00

1.01

1.02

1.03

1.04

1.05

-40 10-15 35 60 85

NORMALIZED RESET THRESHOLD

vs. TEMPERATURE

MAX6701 toc05

TEMPERATURE (°C)

NORMALIZED RESET THRESOLD

0 40 80 120 160

MAXIMUM VCC TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

MAX6701 toc06

RESET THRESHOLD OVERDRIVE (mV)

MAXIMUM TRANSIENT DURATION (µs)

0

10

20

30

40

50

60

MAX670_Y

RESET OCCURS
ABOVE LINE

0

25

50

75

100

0 800 1600 2400400 1200 2000 2800 3200

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX6701 toc07

SINK CURRENT (µA)

V

OL

(mV)

VCC ≥ 4.25V

0

50

150

100

250

300

200

350

0 800 1200400 1600 2000 2400 2800 3200

VCC - VOH vs. SOURCE CURRENT

MAX6701 toc08

SOURCE CURRENT (µA)

V

CC

- V

OH

(mV)

VCC ≥ 4.25V