MAX6361, MAX6361H, MAX6361L, MAX6361P, MAX6362, MAX6362H, MAX6362L, MAX6362P, MAX6363, MAX6363H, MAX6363L, MAX6363P, MAX6364, MAX6364H, MAX6364L, MAX6364P SOT23, Low-Power Microprocessor Supervisory Circuits with Battery Backup

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Description

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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).

Key Features

Applications/Uses

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
Underwriters Laboratories (UL®) Recognized

	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

Key Specifications: Battery Backup Circuits

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Max. I_CC (µA)

Features

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX6361H

2.5 to 3.3
3.3 to 5.5

Open Drain

•	Manual Reset

Yes

SOT-23/6

-40 to +85

$1.50 @ 1k

MAX6361L

2.5 to 3.3
3.3 to 5.5

Push-Pull

•	Manual Reset

$1.50 @ 1k

MAX6361P

2.5 to 3.3
3.3 to 5.5

Open Drain

•	Manual Reset

$1.50 @ 1k

MAX6362H

2.5 to 3.3
3.3 to 5.5

Open Drain

•

Watchdog

$1.50 @ 1k

MAX6362L

2.5 to 3.3
3.3 to 5.5

Push-Pull

•

Watchdog

$1.50 @ 1k

MAX6362P

2.5 to 3.3
3.3 to 5.5

Open Drain

•

Watchdog

$1.50 @ 1k

MAX6363H

2.5 to 3.3
3.3 to 5.5

Open Drain

•	Battery On

$1.50 @ 1k

MAX6363L

2.5 to 3.3
3.3 to 5.5

Push-Pull

•	Battery On

$1.50 @ 1k

MAX6363P

2.5 to 3.3
3.3 to 5.5

Open Drain

•	Battery On

$1.50 @ 1k

MAX6364H

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Open Drain

•	Adjustable Reset Input

$1.50 @ 1k

MAX6364L

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Push-Pull

•	Adjustable Reset Input

$1.50 @ 1k

MAX6364P

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Open Drain

•	Adjustable Reset Input

$1.50 @ 1k

See All Battery Backup Circuits (92)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.