MAX814, MAX815, MAX816 ±1% Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits

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The MAX814/MAX815/MAX816 are high-accuracy microprocessor (µP) supervisory circuits that provide power-on reset, watchdog, and power-fail functions. They eliminate manual trimming and improve reliability in critical applications needing high-accuracy reset thresholds. The active-low RESET output is guaranteed to be in the correct state for V_CC down to 1V. The reset comparator is designed to ignore fast transients on V_CC. Reset thresholds are available for operation with a variety of 3V and 5V supply voltages.

A 75µA maximum supply current makes the MAX814/MAX815/MAX816 ideal for use in portable equipment. All three devices are available in 8-pin DIP and SO packages. See the Selector Table below for a review of features.

Key Features

Applications/Uses

±1% Worst-Case Reset Threshold Accuracy
4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset Thresholds
±1% Low-Line Threshold Accuracy (MAX814) 60mV Above Reset Threshold
200ms Reset Time Delay
Active-Low RESET Output
Active-High RESET Output (MAX814/MAX816)
75µA Max Supply Current
Guaranteed active-low RESET Valid to V_CC = 1V
Manual Reset Input
±2% Power-Fail Comparator
Independent Watchdog with 1.56sec Timeout (MAX815)
Power-Supply Glitch Immunity
8-Pin SO and DIP Packages

	Controllers
	Critical µP Monitoring
	Intelligent Instruments
	Medical Equipment
	Portable Battery-Powered Equipment
	Set-Top Boxes

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

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX814

2.5 to 3.3
3.3 to 5.5

Push-Pull

85ms to 300ms

No Watchdog

Adjustable Reset Input
Manual Reset
Power Fail Comparator

Yes

PDIP/8
SOIC/8

-40 to +85
0 to +70

$4.39 @ 1k

MAX815

2.5 to 3.3
3.3 to 5.5

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

1s to 2s

$4.74 @ 1k

MAX816

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

Push-Pull

No Watchdog

$4.39 @ 1k

See All Supervisors (1 Monitored Voltage) (268)

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.