Part	Reset	Number of Voltages Monitored	Voltage - Threshold	Reset Timeout	Output	Type	Package / Case	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Reset Timeout
Analog Devices Inc./Maxim Integrated MAX822SUS+T	Active High	1	2.93 V	Adjustable/Selectable	Push-Pull Totem Pole	Simple Reset/Power-On Reset	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4
Analog Devices Inc./Maxim Integrated MAX822MUS-T	Active High	1		Adjustable/Selectable	Push-Pull Totem Pole	Simple Reset/Power-On Reset	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4
Analog Devices Inc./Maxim Integrated MAX822LUS+T
Analog Devices Inc./Maxim Integrated MAX822MUS+T	Active High	1		Adjustable/Selectable	Push-Pull Totem Pole	Simple Reset/Power-On Reset	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4
Analog Devices Inc./Maxim Integrated MAX822TUS+T	Active High	1	3.08 V		Bidirectional	Power Supply Monitor	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4	100 ms
Analog Devices Inc./Maxim Integrated MAX822TUS	Active High	1	3.08 V			Power Supply Monitor	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-23-4	100 ms
Analog Devices Inc./Maxim Integrated MAX822RUS	Active High	1	2.63 V	Adjustable/Selectable	Push-Pull Totem Pole	Simple Reset/Power-On Reset	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4
Analog Devices Inc./Maxim Integrated MAX822MUS	Active High	1		Adjustable/Selectable	Push-Pull Totem Pole	Simple Reset/Power-On Reset	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-143-4
Analog Devices Inc./Maxim Integrated MAX822LUS	Active High	1	4.63 V			Power Supply Monitor	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-23-4	100 ms
Analog Devices Inc./Maxim Integrated MAX822SUS-T	Active High	1	2.93 V			Power Supply Monitor	TO-253-4 TO-253AA	Surface Mount	125 °C	-40 °C	SOT-23-4	100 ms

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	0	$ 2.22
	Tape & Reel (TR)	2500	$ 1.65
		5000	$ 1.58

Description

General part information

MAX822 Series

The MAX821/MAX822 microprocessor (µP) supervisory circuits monitor power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits. The MAX821/MAX822 also provide a power-on reset timeout delay that is pin selectable to 1ms (max), 20ms (min), or 100ms (min).These devices perform a single function: they assert a reset signal whenever the VCCsupply voltage falls below a preset threshold, and they keep reset asserted for the pin-selected reset timeout delay after VCChas risen above the reset threshold. The only difference between the two devices is that the MAX821 has an active-low RESET output (which is guaranteed to be in the correct state for VCCdown to 1V), while the MAX822 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds suitable for operation with a variety of supply voltages are available.Low supply current makes the MAX821/MAX822 ideal for use in portable equipment. These devices come in a 4-pin SOT143 package.ApplicationsBar-Code ScannersComputers: Desktop, Workstation, ServerControllersCritical µP and µC Power MonitoringIntelligent InstrumentsPortable Battery-Powered Equipment

Documents

Technical documentation and resources

Package Drawing - 4-SOT_23-N/A

Package Drawing

MAX821-MAX822T: 4-Pin, µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay Data Sheet (Rev.3)

Data Sheet