MIC8115 datasheet(6/14 Pages) MICROCHIP

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MIC8115

DS20005829B-page 6

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2017 - 2022 Microchip Technology Inc.

3.0

APPLICATION INFORMATION

3.1

Microprocessor Reset

The /RESET pin is asserted whenever VCC falls below

the reset threshold voltage. The reset pin remains

asserted for a period of 1100 ms after VCC has risen

above the reset threshold voltage. The reset function

ensures the microprocessor is properly reset and

powers up into a known condition after a power failure.

/RESET will remain valid with VCC as low as 1.4V.

3.2

VCC Transients

The MIC8115 is relatively immune to the

negative-going VCC glitches below the reset threshold.

Typically, a negative-going transient 125 mV belt the

reset threshold with duration of 20 µs or less will not

cause a reset.

3.3

/RESET Valid at Low Voltage

A resistor can be added from the /RESET pin to the

ground to ensure the /RESET output remains low with

VCC down to 0V. A 100 kΩ resistor connected from

/RESET to ground is recommended. The resistor

should be large enough not to load the /RESET output

and small enough to pull-down any stray leakage

currents.

FIGURE 3-1:

/RESET Valid to VCC = 0V.

MIC8115

μP

/RESET

GND

/RESET

100k

MIC8115 Datasheet(PDF) 6 Page - Microchip Technology