MIC2774 datasheet(5/18 Pages) MICROCHIP

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2022 Microchip Technology Inc.

DS20006527A-page 5

MIC2774

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1:

PIN FUNCTION TABLE

Pin Number

MIC2774H

Pin Number

MIC2774L

MIC2774N

Pin Name

Description

—

RST

Digital (Output): Asserted high whenever VIN or VDD falls below the

threshold voltage. It will remain asserted for no fewer than 140 ms

after VIN and VDD return above the threshold limits.

—

/RST

Digital (Output): Asserted low whenever VIN or VDD falls below the

threshold voltage. It will remain asserted for no fewer than 140 ms

after VIN and VDD return above the threshold limits. (Open-drain for

“N” version, requires an external pull-up resistor).

GND

Ground.

/MR

Digital (Input): Driving this pin low initiates immediate and uncondi-

tional reset. Assuming VIN and VDD are above the thresholds when

/MR is released (returns high), the reset output will be de-asserted no

fewer than 140 ms later. /MR may be driven by a logic signal or a

mechanical switch. /MR has an internal pull-up to VDD and may be left

open if unused.

Analog (Input): The voltage on this pin is compared to the internal

300 mV reference. An undervoltage condition will trigger a reset

sequence.

VDD

Analog (Input): Power supply input for internal circuitry and input to

the fixed voltage monitor. The voltage on this pin is compared against

the internal reference. An undervoltage condition will trigger a reset

sequence.

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