Maxim MAX6364PUT44-T, MAX6364PUT46-T, MAX6364PUT26-T, MAX6364PUT29-T, MAX6364LUT44-T Datasheet

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General Description

The MAX6361/MAX6363/MAX6364 supervisory circuits
reduce the complexity and number of components
required for power-supply monitoring and battery control
functions in microprocessor (µP) systems. The circuits sig­nificantly improve system reliability and accuracy com­pared to that obtainable with separate ICs or discrete
components. Their functions include µP reset, backup­battery switchover, and power failure warning.

The MAX6361/MAX6363/MAX6364 operate from supply
voltages as low as +1.2V. The factory preset reset
threshold voltage ranges from 2.32V to 4.63V (see
Ordering Information). These devices provide a manual
reset input (MAX6361), battery-on output (MAX6363),
and an auxiliary adjustable reset input (MAX6364). In
addition, each part type is offered in three reset output
versions: an active-low push-pull reset, an active-low
open-drain reset, and an active-high push-pull reset
(see Selector Guide at end of data sheet).

Applications

Features

♦ Low +1.2V Operating Supply Voltage

(V

CC

or V

BATT

)

♦ Precision Monitoring of +5.0V, +3.3V, +3.0V, and

+2.5V Power-Supply Voltages

♦ Debounced Manual Reset Input (MAX6361)
♦ Battery-On Output Indicator (MAX6363)
♦ Auxiliary User-Adjustable RESET IN (MAX6364)
♦ Three Available Output Structures

Push-Pull RESET, Open-Drain RESET,
Push-Pull RESET

♦ RESET/RESET Valid Down to 1.2V Guaranteed

(V

CC

or V

BATT

)

♦ Power-Supply Transient Immunity
♦ 150ms (min) Reset Timeout Period
♦ Small 6-Pin SOT23 Package

MAX6361/MAX6363/MAX6364

SOT23, Low-Power µP Supervisory Circuits

with Battery Backup

________________________________________________________________ Maxim Integrated Products 1

19-1615; Rev 0; 1/00

Ordering Information

Pin Configurations

Note: These parts offer a choice of reset threshold voltages.
From Table 1, select the suffix corresponding to the desired
threshold voltage and insert it into the part number to complete
it. When ordering from the factory, there is a 2500-piece mini­mum on the SOT package (tape-and-reel only).

GND

V

CC

MR

16BATT

5 OUT

RESET, RESET

MAX6361

TOP VIEW

2

34

SOT23-6

Computers

Controllers

Intelligent Instruments

Critical µP/µC
Power Monitoring

Fax Machines

Industrial Control

POS Equipment

Portable/Battery-Powered
Equipment

Selector Guide appears at end of data sheet.

Typical Operating Circuit appears at end of data sheet.

Pin Configurations continued at end of data sheet.

6 SOT23-6-40°C to +85°CMAX6364HUT_ _-T

6 SOT23-6-40°C to +85°CMAX6364PUT_ _-T

6 SOT23-6-40°C to +85°C

MAX6364LUT_ _-T

6 SOT23-6-40°C to +85°C

6 SOT23-6-40°C to +85°CMAX6363HUT_ _-T

MAX6363PUT_ _-T

6 SOT23-6-40°C to +85°C

6 SOT23-6-40°C to +85°C

MAX6363LUT_ _-T

6 SOT23-6

PIN-PACKAGETEMP. RANGE

-40°C to +85°C

MAX6361HUT_ _-T

6 SOT23-6-40°C to +85°CMAX6361PUT_ _-T

MAX6361LUT_ _-T

PART

MAX6361/MAX6363/MAX6364

SOT23, Low-Power µP Supervisory Circuits
with Battery Backup

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +2.4V to +5.5V, V

BATT

= 3V, TA= -40°C to +85°C, reset not asserted, typical values are at TA= +25°C, unless otherwise

noted.) (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.

Terminal Voltages (with respect to GND)

VCC, BATT, OUT...................................................-0.3V to +6V

RESET (open drain)..............................................-0.3V to +6V

BATT ON, MR, RESET IN .....................-0.3V to (V

OUT

+ 0.3V)

RESET, RESET......................................-0.3V to (V

OUT

+ 0.3V)

Input Current

V

CC

Peak ............................................................................1A

V

CC

Continuous ............................................................250mA

BATT Peak ....................................................................250mA

BATT Continuous ............................................................40mA

GND ................................................................................75mA

Output Current

OUT................................Short-Circuit Protection for up to 10s

RESET, RESET, BATT ON ..............................................20mA

Continuous Power Dissipation (T

A

= +70°C)

6-Pin SOT23 (derate 8.70mW/°C above +70°C) .........696mW

Operating Temperature Range

MAX636_ .........................................................-40°C to +85°C

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

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

0 5.5

No load (Note 2)

VCC,

V

BATT

Operating Voltage Range,
VCCor V

BATT

Supply Current
(excluding I

OUT

)

I

CC

No load, VCC> V

TH

VCC= 2.8V

VCC= 3.6V

VCC= 5.5V

10 30

11 35

15 50

µA

µA

1

3

TA= +25°C

TA= -40°C to +85°C

V

BATT

= 2.8V,

VCC= 0

I

SUPPLY

I

SUPPLY

in Battery-Backup

Mode (excluding I

OUT

)

BATT Standby Current I

BATT

5.5V > VCC>
(V

BATT

+ 0.2V)

TA= +25°C

TA= -40°C to +85°C

-0.1 0.02

-1.0 0.02

µA

Ω

1.25

2.25

4.6

VCC= 4.75V, I

OUT

≤ 150mA

VCC= 3.15V, I

OUT

≤ 65mA

VCC= 2.38V, I

OUT

≤ 25mA

R

ON

VCCto OUT On-Resistance

V

OUT

in Battery-Backup Mode

Battery-Switchover Threshold
(VCC- V

BATT

)

Reset Threshold

VCCFalling Reset Delay

Reset-Active Timeout Period t

RP

V

TH

V

BATT

= 4.5V, I

OUT

≤ 20mA

V

BATT

= 3.0V, I

OUT

≤ 10mA

V

BATT

= 2.25V, I

OUT

≤ 5mA

V

CC

< V

TH

MAX636_UT46

VCCfalling at 10V/ms

V

BATT

- 0.2

V

BATT

- 0.15

V

BATT

- 0.15

20

-20

4.50 4.63 4.75

4.25 4.38 4.50

3.00 3.08 3.15

2.85 2.93 3.00

2.55 2.63 2.70

2.25 2.32 2.38

35

150 280

ms

µs

V

mV

V

Power-up

Power-down

MAX636_UT23

MAX636_UT26

MAX636_UT29

MAX636_UT31

MAX636_UT44

V

MAX6361/MAX6363/MAX6364

SOT23, Low-Power µP Supervisory Circuits

with Battery Backup

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.4V to +5.5V, V

BATT

= 3V, TA= -40°C to +85°C, reset not asserted, typical values are at TA= +25°C, unless otherwise

noted.) (Note 1)

Note 1: Overtemperature limits are guaranteed by design and not production tested.
Note 2: V

BATT

can be 0 anytime or VCCcan go down to 0 if V

BATT

is active (except at startup).

PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS

Output Voltage V

OL

0.4

V

Output Short-Circuit Current

60

mA

I

SINK

= 3.2mA, V

BATT

= 2.1V

Sink current, VCC= 5V

RESET Output Leakage Current

I

LK

1

µA

MR Input Voltage

0.7 · V

CC

V

Pull-Up Resistance

20

kΩ

Minimum Pulse Width

1

µs

Glitch Immunity

100

ns

MR to Reset Delay

120

ns

MAX636_P only

VCC= 3.3V

VCC= 3.3V

RESET Output Voltage

V

OL

0.3

V

Reset asserted,
V

BATT

= 0

Input Threshold

1.185 1.235 1.285

V

RESET IN Leakage Current ±0.01 ±25 nA

1.5 µsOverdrive voltage = 50mV, RESET IN fallingRESET IN to Reset Delay

10 30 100

µASource current, V

BATT

≥ 2V

V

IH

V

IL

0.3 · V

CC

RESET Output Voltage

V

OH

0.7 · V

CC

V

Reset asserted,
V

BATT

= 0

V

OL

0.3

V

OH

0.8 · V

CC

Reset not asserted

Reset not asserted
(MAX636_L only)

I

SOURCE

= 500µA,

V

CC

≥ V

TH(MAX)

I

SINK

= 1.6mA,

VCC≥ V

TH(MAX)

0.8 · V

CC

0.4

I

SOURCE

= 1mA,

VCC≥ 1.8V

I

SOURCE

= 200µA,

VCC≥ 1.2V

I

SINK

= 100µA,

VCC≥ 1.2V

I

SINK

= 1.6mA,

VCC≥ 2.1V

MANUAL RESET (MAX6361 only)

BATT ON (MAX6363 only)

RESET IN (MAX6364 only)