The MAX6361–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, backup battery switchover, and power failure warning.

The MAX6361–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), watchdog timer input (MAX6362), 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 open-drain reset (see Selector Guide at end of data sheet).

MAX6361, MAX6362, MAX6363, MAX6364: Typical Operating Circuit

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Key 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)
Watchdog Timer with 1.6s Timeout Period (MAX6362)
Battery-On Output Indicator (MAX6363)
Auxiliary User-Adjustable RESET IN (MAX6364)
Three Available Output Structures
- Push-Pull Active-Low RESET, Open-Drain Active-Low RESET, Open-Drain RESET
RESET/Active-Low 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

Applications/Uses

Computers: Desktop, Workstation, Server
Notebook Computers
Palmtop Computers
Pen Entry Palmtops
Portable Patient Monitoring/Drug Delivery
Portable Test Meters
POS Terminals
Printers and Faxes
Programmable Logic Controllers

Parametric Specs

Part Number

Reset Thresh.
(V)

Reset Out

I_CC
(µA)

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

max

See Notes

MAX6361H

2.5 to 3.3

3.3 to 5.5

Active High

Open Drain

-40 to +85

SOIC(N)/8

$3.27 @1k

MAX6361L

2.5 to 3.3

3.3 to 5.5

Active Low

Push-Pull

SOIC(N)/8

$2.63 @1k

MAX6361P

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

SOIC(N)/8

$2.59 @1k

MAX6362H

2.5 to 3.3

3.3 to 5.5

Active High

Open Drain

SOIC(N)/8

$3.27 @1k

MAX6362L

2.5 to 3.3

3.3 to 5.5

Active Low

Push-Pull

SOIC(N)/8

$3.14 @1k

MAX6362P

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

SOIC(N)/8

$3.27 @1k

MAX6363H

2.5 to 3.3

3.3 to 5.5

Active High

Open Drain

SOIC(N)/8

$3.27 @1k

MAX6363L

2.5 to 3.3

3.3 to 5.5

Active Low

Push-Pull

SOIC(N)/8

$3.14 @1k

MAX6363P

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

SOIC(N)/8

$2.10 @1k

MAX6364L

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Push-Pull

SOIC(N)/8

$2.63 @1k

MAX6364P

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

SOIC(N)/8

$2.26 @1k

See All Battery Backup Circuits (81)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Quality and Environmental Data

Product Reliability Reports: MAX6364P.pdf
Request Reliability Report for: MAX6364H MAX6364L
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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