MAX6381, MAX6382, MAX6383, MAX6384, MAX6385, MAX6386, MAX6387, MAX6388, MAX6389, MAX6390 SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits

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The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever V_CC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after V_CC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.

The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer V_CC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and 6-pin µDFN packages and the MAX6384–MAX6390 are available in 4-pin SC70 and 6-pin µDFN packages.

Key Features

Applications/Uses

Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments
±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)
Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)
3 Reset Output Options
- Active-Low Push-Pull
- Active-High Push-Pull
- Active-Low Open-Drain
Reset Output State Guaranteed Valid Down to V_CC = 1V
Manual Reset Input (MAX6384/MAX6385/MAX6386)
Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
V_CC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)
Negative-Going V_CC Transient Immunity
Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V
Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713
Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages

	Computers
	Controllers
	Critical µP and µC Power Monitoring
	Dual Voltage Systems
	Intelligent Instruments
	Portable Battery-Powered Equipment

Key Specifications: Microprocessor Supervisors

Part Number

Number of Monitored Voltages

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^*

MAX6381

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

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

No Watchdog

1.5

Automotive - General

MicroDFN/6
SC-70/3

Yes

-40 to +125
-40 to +85
0 to +70

$0.96 @ 1k

MAX6382

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

SC-70/3

$0.96 @ 1k

MAX6383

Open Drain

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

MicroDFN/6
SC-70/3

$0.96 @ 1k

MAX6384

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6385

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6386

Open Drain

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

MicroDFN/6
SC-70/3
SC-70/4

$0.96 @ 1k

MAX6387

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Adjustable Reset Input
Manual Reset

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6388

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Adjustable Reset Input

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6389

Open Drain

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Adjustable Reset Input

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6390

Open Drain

>1s

Manual Reset

SC-70/3
SC-70/4

$0.96 @ 1k

See All Microprocessor Supervisors (435)

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

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

Supervisor Functions

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^*

MAX6381

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

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

No Watchdog

1.5

Simple Reset/ Power-On Reset

Automotive - General

MicroDFN/6
SC-70/3

Yes

-40 to +125
-40 to +85
0 to +70

$0.96 @ 1k

MAX6382

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Simple Reset/ Power-On Reset

SC-70/3

$0.96 @ 1k

MAX6383

Open Drain

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Simple Reset/ Power-On Reset

MicroDFN/6
SC-70/3

$0.96 @ 1k

MAX6384

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

Simple Reset/ Power-On Reset

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6385

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

Simple Reset/ Power-On Reset

SC-70/3
SC-70/4

$0.96 @ 1k

MAX6386

Open Drain

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

Manual Reset

Simple Reset/ Power-On Reset

MicroDFN/6
SC-70/3
SC-70/4

$0.96 @ 1k

MAX6390

Open Drain

>1s

Manual Reset

Push-Button Device
Simple Reset/ Power-On Reset

SC-70/3
SC-70/4

$0.96 @ 1k

See All Supervisors (1 Monitored Voltage) (275)

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

Supervisor Functions

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^*

MAX6387

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

Push-Pull

15ms to 85ms
1ms to 15ms
300ms to 1s
85ms to 300ms
>1s

No Watchdog

Adjustable Reset Input
Manual Reset

1.5

Multivoltage Monitor
Simple Reset/ Power-On Reset

Automotive - General

SC-70/3
SC-70/4

Yes

-40 to +125
-40 to +85
0 to +70

$0.96 @ 1k

MAX6388

Push-Pull

Adjustable Reset Input

$0.96 @ 1k

MAX6389

Open Drain

Adjustable Reset Input

$0.96 @ 1k

See All Supervisors (2 Monitored Voltages) (87)

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.