QuickView - MAX6701, MAX6701A, MAX6702, MAX6702A, MAX6703, MAX6703A, MAX6704, MAX6705, MAX6705A, MAX6706, MAX6706A, MAX6707, MAX6707A, MAX6708 Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer

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Description

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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/power-fail-out comparator, a manual reset input, and a reset-based 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.

Key Features

Applications/Uses

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

	Automotive Systems
	Computers
	Controllers
	Critical µP Power Monitoring
	Intelligent Instruments
	Networking
	Telecommunications
	White Goods

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Supervisor Features

Max. I_CC (µA)

Price^**

MAX6704

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

Push-Pull

85ms to 300ms

Input (WDI)

1s to 2s

Adjustable Reset Input
Manual Reset
Power Fail Comparator

$1.38 @ 1k

MAX6705

Push-Pull

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

$1.38 @ 1k

MAX6706

Push-Pull

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

$1.38 @ 1k

MAX6707

Open Drain

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

$1.38 @ 1k

MAX6708

Push-Pull

No Watchdog

$1.38 @ 1k

See All Supervisors (1 Monitored Voltage) (270)

Key Specifications: Supervisors (3 Monitored Voltages)

Part Number

Interface

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Supervisor Features

Max. I_CC (µA)

Price^**

MAX6701

Factory Fixed
R/C Adjustable

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

Push-Pull

85ms to 300ms

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

Adjustable Reset Input
Manual Reset

$1.38 @ 1k

MAX6702

Factory Fixed
R/C Adjustable

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

Push-Pull

85ms to 300ms

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

Adjustable Reset Input
Manual Reset

$1.38 @ 1k

MAX6703

Factory Fixed
R/C Adjustable

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

Open Drain

85ms to 300ms

Input (WDI)
Input/Output (WDI/WDO)

1s to 2s

Adjustable Reset Input
Manual Reset

$1.38 @ 1k

See All Supervisors (3 Monitored Voltages) (32)

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.