MAX822LUS+T by Analog Devices

4-Pin, µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay


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 VCC supply voltage falls below a preset threshold, and they keep reset asserted for the pin-selected reset timeout delay after VCC has 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 VCC down 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.

Where to Buy

Prices starting from US$1.63

Distributor Stock
Logo for Farnell
Farnell
from US$1.63
1,585
in stock
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Logo for Newark Electronics
Newark Electronics
from US$2.30
1,585
in stock
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Logo for element14
element14
from US$1.73
1,585
in stock
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Logo for Analog Devices
Analog Devices
from US$1.63
-
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Features

Pin-Selectable, Precision Power-On Reset Delay: 1ms (max), 20ms (min), or 100ms (min)
Precision Monitoring of +3V to +5V Power-Supply Voltages
2.5µA Supply Current
Guaranteed Over Temperature (-40°C to +125°C)
Guaranteed Active-Low RESET Valid to VCC = 1V (MAX821)
Power-Supply Transient Immunity
No External Components
SOT143 Package

Specifications

Reset Thresh. (V) 2.5 to 3.33.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active HighPush-Pull
tRESET (min) 15ms to 85ms85ms to 300ms<1msAdjustable
Watchdog Feature No Watchdog
ICC (µA) (max) 7
Package/Pins SOT23/4
BudgetaryPrice (See Notes) 1.52


MAX822LUS+T Power Management ICs - PMIC by Analog Devices

MPU SUPERVISOR 5.5V SOT-143-4

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Threshold Voltage 4.63V
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 1V
Supply Voltage Max 5.5V
Reset Type Active-High Push-Pull
Digital IC Case SOT-143
No. of Pins 4Pins
Delay Time 160ms
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Mp Supervisory Circuit, -40 To 125Deg C | Newark Electronics
MP SUPERVISORY CIRCUIT, -40 TO 125DEG C | element14
4-Pin, µP Voltage Monitors wit | Analog Devices

Frequently Asked Questions

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Is the MAX822LUS+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Newark Electronics, element14, Farnell and Analog Devices have stock available or on a lead time for MAX822LUS+T .

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