MIC811SUY-TR by Microchip Technology

Microprocessor Reset Circuit with Manual Reset, Push-Pull Active-Low Output, 4.6 Vthresh

The MIC811 and MIC812 are inexpensive microprocessor supervisory circuits that monitor power supplies in microprocessor based systems.

The function of this device is to assert a reset if either the power supply drops below a designated reset threshold level or /MR is forced low. Several different reset threshold levels are available to accommodate 3V, 3.3V or 5V powered systems.

The MIC811 has an active low /RESET output, while the MIC812 offers an active high RESET output. The reset output is guaranteed to remain asserted for a minimum of 140ms after VCC has risen above the designed reset threshold level. Having a push-pull output stage, the MIC811/812 does not require a pull-up resistor at the output. The MIC811/812 comes in a 4-pin SOT-143 package.

If a microprocessor voltage supervisor with an open-drain output stage is needed, see MIC6315.

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Precision voltage monitor for 3V, 3.3V or 5V power supplies
/RESET remains valid with VCC as low as 1V
5µA typical supply current
140ms minimum reset pulse width available
Manual reset input
Available in 4-pin SOT-143 package


Product Type Supervisor
Watchdog Timer No
Manual Reset Yes
Power Fail No
Operating Temp. Range (°C) -40 to 85
Vcc Range (V) 1.4 - 5.5
Nominal Reset Voltage (V) 2.63, 2.93, 3.08, 4.00, 4.38, 4.63
Reset Type Active Low
Output Push-Pull
Typical Reset Pulse Width (ms) 140
Typical Supply Current (µA) 5
Pins | Packaging 4 | SOT-143
Temp Range -40C to +85C
Packing Media Tape and reel (3000)

Environmental Information

JEDEC Indicator e4
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.011
Shipping Weight (kg) 0.036
Lead Count 4
Package Type SOT-143
Soldering Composition NiPdAu

Alternative Descriptions

Microprocessor Reset Circuit with Manual Reset, Push-Pull Active-Low Output, 2.9 | Microchip Technology
MIC811 Series 2.93V 240ms Surface Mount Microprocessor Reset Circuit - SOT-143-4 | Future Electronics
Voltage Supervisor, 2.93V, Sot-143-4 | Newark Electronics
RESET, ACTIVE LOW, 2.93V, 0.24S, 4SOT143 | element14
Processor Supervisor 3V 1 to 5.5V 4-Pin SOT-143 T/R | Avnet America

Frequently Asked Questions

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Additional datasheets, footprints and schematics for MIC811SUY-TR are listed on our Part Details page. You can also find images and similar parts to MIC811SUY-TR on this page.

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Is the MIC811SUY-TR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for MIC811SUY-TR have stock available?

Authorised distributors including Microchip Technology, Future Electronics, Newark Electronics, element14 and Farnell have stock available or on a lead time for MIC811SUY-TR.

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