MAXIM MAX6351, MAX6360 Technical data

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General Description

The MAX6351–MAX6360 microprocessor (µP) supervi­sors with multiple reset voltages significantly improve
system reliability and accuracy compared to separate
ICs or discrete components. If any input supply voltage
drops below its associated preset threshold, all reset
outputs are asserted. In addition, the output(s) is valid
as long as either input supply voltage remains greater
than +1.0V.

All devices in this series have an active-low debounced
manual reset input. In addition, the MAX6358/MAX6359/
MAX6360 offer a watchdog timer input with a 46.4sec
start-up timeout period and a 2.9sec timeout period.
The MAX6355/MAX6356/MAX6357 offer an additional
voltage monitor input to monitor a third voltage.

The MAX6351 features both 3V and 5V active-low push­pull reset outputs. The MAX6353/MAX6356/MAX6359
offer a 5V active-low push-pull reset. The MAX6354/
MAX6357/MAX6360 offer a 3V active-low push-pull
reset. The MAX6352/MAX6355/MAX6358’s reset is
active-low open-drain.

All of these devices are offered with a wide variety of
voltage threshold levels, as shown in the

Voltage

Threshold Levels

table below. They are available in 5­and 6-pin SOT23 packages and operate over the
extended (-40°C to +85°C) temperature range.

Applications

Computers Intelligent Instruments
Controllers Multivoltage Systems
Portable/Battery-Powered

Equipment

Features

♦ Precision Monitoring of Multiple +2.5V, +3.0V,

+3.3V, and +5V Power-Supply Voltages

♦ Precision Factory-Set Power-Supply

Reset Thresholds

♦ 20µA Supply Current
♦ 100ms min Power-On Reset Pulse Width
♦ Fully Guaranteed Over Temperature
♦ Guaranteed RESET Valid to V

CC

5 = 1V or

V

CC

3 = 1V

♦ Power-Supply Transient Immunity
♦ No External Components for Dual-Voltage

Systems

♦ Small 5- and 6-Pin SOT23 Packages
♦ Debounced TTL/CMOS-Compatible

Manual-Reset Input

♦ Watchdog Timer

46.4sec Start-Up Timeout

2.9sec Normal Timeout

♦ Low Cost

MAX6351–MAX6360

Dual/Triple-Voltage

µP Supervisory Circuits

________________________________________________________________

Maxim Integrated Products

1

19-1508; Rev 1; 10/99

*

The _ _ are placeholders for the threshold voltage levels of the
devices. Substitute the part number suffix in the Voltage
Threshold Levels table for the desired voltage level. There are
two standard versions for each of the above part numbers. All
devices are available in tape-and-reel only.

Ordering Information

PART*
MAX6351_ _UT-T
MAX6352_ _UK-T
MAX6353_ _UK-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

6 SOT23-6
5 SOT23-5
5 SOT23-5

MAX6354_ _UK-T
MAX6355_ _UT-T
MAX6356_ _UT-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C 5 SOT23-5
6 SOT23-6
6 SOT23-6

MAX6357_ _UT-T
MAX6358_ _UT-T
MAX6359_ _UT-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C 6 SOT23-6
6 SOT23-6
6 SOT23-6

MAX6360_ _UT-T

-40°C to +85°C 6 SOT23-6

PART NO.

SUFFIX

(_ _)

VCC5 NOMINAL

VOLTAGE

THRESHOLD (V)

VCC3 NOMINAL

VOLTAGE

THRESHOLD (V)

LT 4.63 3.08

LS

LR 4.63 2.63

4.63 2.93

MT
MS 4.38 2.93
MR

4.38 3.08

TY 3.08 2.19

4.38 2.63

SY 2.93 2.19

Note: Standard versions are shown in bold and have a required

order increment of 2500 pieces. Sample stock is generally held on
the standard versions only. The required order increment for non­standard versions is 10,000 pieces. Contact factory for availability.

__________Voltage Threshold Levels

Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.

查询MAX6351供应商

MAX6351–MAX6360

Dual/Triple-Voltage
µP Supervisory Circuits

2 _______________________________________________________________________________________

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.

VCC5, VCC3 to GND .................................................-0.3V to +6V

RST (MAX6352/55/58)............................................. -0.3V to +6V

RST, MR, WDI, RST5, RSTIN

(MAX6351/53/56/59).............................-0.3V to (V

CC

5 + 0.3V)

RST, RST3 (MAX6351/54/57/60) .................-3V to (V

CC

3 + 0.3V)

Input/Output Current, All Pins .............................................20mA

Continuous Power Dissipation (T

A

= +70°C)

5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) ........571mW

6-Pin SOT23-6 (derate 7.1mW/°C above +70°C) ........571mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

100mV overdrive

VCC5 = 5.5V, VCC3 = 3.6V, all I/O pins open

VCCto Reset Delay

TA= -40°C to +85°C

MAX63_ _ _Y

TA= 0°C to +70°C

MAX63_ _ _R

MAX63_ _S_

MAX63_ _ _S

MAX63_ _T_

MAX63_ _ _T

MAX63_ _M_

CONDITIONS

µs

20

V

VTH/500

Reset Threshold Hysteresis

ppm/°C

20

∆VTH/°CReset Threshold Tempco

2.13 2.25

2.16 2.19 2.22

2.55 2.70

2.58 2.63 2.68

2.85 3.00

2.88 2.93 2.98

3.00 3.15

V

3.03 3.08 3.14

VTH3VCC3 Threshold (Note 3)

2.85 3.00

µA

20 50

ICC5 +

ICC3

Supply Current

1.2 5.5

V

1.0 5.5

V

CC

Supply Voltage Range (Note 2)

2.88 2.93 2.98

3.00 3.15

3.03 3.08 3.14

4.25 4.50
V

4.54 4.63 4.72

VTH5VCC5 Threshold (Note 3)

4.5 4.75

4.3 4.38 4.46

UNITSMIN TYP MAXSYMBOLPARAMETER

VCC5 > VTH5

(MAX)

, VCC3 > VTH3

(MAX)

VCC5 or VCC3 ≥ 2.7V, I

SINK

= 1.2mA

VCC5 or VCC3 ≥ 4.5V, I

SINK

= 3.2mA

VCC5 or VCC3 < 1V, I

SINK

= 50µA,

TA= 0°C to +70°C

ms

100 180 280

t

RP

Reset Timeout Period

0.3

0.4
V

0.3

TA= +25°C

MAX63_ _L_

TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C
TA= +25°C
TA= -40°C to +85°C

ELECTRICAL CHARACTERISTICS

(VCC3 = VCC5 = +1.2V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

VCC5 or VCC3 < 1.2V, I

SINK

= 50µA

V

OL

RESET Output Voltage Low

0.3

V

MAX6351–MAX6360

Dual/Triple-Voltage

µP Supervisory Circuits

_______________________________________________________________________________________ 3

Note 1: Overtemperature limits are guaranteed by design and not production tested.
Note 2: The reset output is guaranteed to be in the correct state if either V

CC

3 or VCC5 is within its specified region of operation.

Note 3: The reset output(s) is asserted if either V

CC

5 or VCC3 drops below its associated trip point.

Note 4: Guaranteed by design. Not production tested.
Note 5: WDI is internally serviced within the watchdog timeout period if WDI is left unconnected.
Note 6: The WDI input current is specified as the average input current when the WDI input is driven high or low.

MAX6351/MAX6353/
MAX6354/MAX6356/
MAX6357/MAX6359/
MAX6360
(_Y versions only),
VCC5 > VTH5

(MAX)

,

VCC3 > VTH3

(MAX)

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

MAX63_ _ _Y, VCC5 > VTH5

(MAX)

MAX63_ _ _Y, VCC5 > VTH5

(MAX)

MAX63_ _L_, MAX63_ _M_, VCC5 > VTH5

(MAX)

MAX63_ _L_, MAX63_ _M_, VCC5 > VTH5

(MAX)

V

WDI

= 0

V

WDI

= V

CC

First timeout period after reset

MAX6351/MAX6353/
MAX6354/MAX6356/
MAX6357/MAX6359/
MAX6360
(L_, M_ versions only),
VCC5 > VTH5

(MAX)

,

VCC3 > VTH3

(MAX)

VCC3 = 5V

VIL= 0.4V, VIH= 0.8V

CC

µs

10

t

RP

MR Minimum Pulse Width

kΩ

32 63.5 100

MR Pull-Up Resistance

0.7V

CC

2.3

V

IL

0.8

MR Input

V

-20 -15

µA

120 160

WDI Input Current (Note 6)

0.7V

CC

V

IH

V

0.3V

CC

V

IL

WDI Input Threshold (Note 5)

ns

50

t

WDI

WDI Pulse Width (Note 4)

1.6 2.9 4.5

sec

25.6 46.4 72.0

t

WD

Watchdog Timeout Period

V

CC

- 1.5

0.8V

CC

0 < V

RISTIN

< VCC5 - 0.3V

VCC5 > VTH5

(MAX),

VCC3 > VTH3

(MAX)

mV

2.5

RSTIN Hysteresis

nA

-25 25

I

RSTIN

RSTIN Input Current

1.19 1.25

V

1.20 1.22 1.24

V

RSTIN

RSTIN Input Threshold

µs

0.1

t

MD

MR to Reset Delay

ns

100

MR Glitch Rejection

TA= +25°C
TA= -40°C to +85°C

ELECTRICAL CHARACTERISTICS (continued)

(VCC3 = VCC5 = +1.2V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

WATCHDOG INPUT (MAX6358/MAX6359/MAX6360)

MANUAL RESET INPUT

ADJUSTABLE RESET COMPARATOR INPUT (MAX6355/MAX6356/MAX6357)

I

SOURCE

= 500µA

V

OH

RESET Output Voltage High

I

SOURCE

= 800µA

V

After first WDI falling edge

0.3V

CC

V

IL

V

IH

V

IH