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

1% Accurate Microprocessor Supervisory ICs

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 VCC down to 1V. The reset comparator is designed to ignore fast transients on VCC. 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

±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 VCC = 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

MAX814, MAX815, MAX816: Typical Application Circuits

Applications/Uses

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

DataSheet

title	Download file
MAX814-MAX816 Data Sheet	MAX814-MAX816.pdf

Parametrics

Part Number	Reset Thresh. (V)	Reset Out	t_RESET	Watchdog Feature	Watchdog Timeout	Supervisor Features	Reset Thresh. Accur. (%)	I_CC (µA)	Package/Pins	Budgetary Price
Part Number	Reset Thresh. (V)	Reset Out	min	Watchdog Feature	Watchdog Timeout	Supervisor Features	@ +25°C	max	Package/Pins	See Notes
MAX814	2.5 to 3.3 3.3 to 5.5	Active High Active Low Push-Pull	85ms to 300ms	No Watchdog	-	Adjustable Reset Input Manual Reset Power Fail Comparator/Low Battery Detect	1	75	PDIP(N)/8 SOIC(N)/8	$5.45 @1k
MAX815	2.5 to 3.3 3.3 to 5.5	Active Low Push-Pull		Input (WDI) Input/Output (WDI/WDO)	1s to 2s				PDIP(N)/8 SOIC(N)/8	$6.37 @1k
MAX816	1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5	Active High Active Low Push-Pull		No Watchdog	-				PDIP(N)/8 SOIC(N)/8	$5.82 @1k

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX816CPA	No Longer Available	MAX816CPA+	PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	No
MAX816CPA+	Active		PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	Lead Free
MAX816CSA	No Longer Available	MAX816CSA+	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX816CSA+	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX816CSA+T	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX816CSA-T	No Longer Available	MAX816CSA+T	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX816EPA	No Longer Available	MAX816EPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX816EPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
MAX816ESA	No Longer Available	MAX816ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX816ESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX816ESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX816ESA-T	No Longer Available	MAX816ESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet

MAX814-MAX816.pdf MAX816

Supervisor ICs Monitor Battery-Powered Equipment MAX816

MAX814-MAX816.pdf MAX814