MIC2786 Просмотр технического описания (PDF) - Micrel

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Компоненты Описание

производитель

MIC2786

Push-Button Reset IC with Voltage Supervisor

Micrel 

Micrel, Inc.

Pin Configuration

MIC2786/MIC2787

MIC2786/MIC2787

8-Pin (2mm × 2mm) Thin MLF®

Top View

Pin Description

Pin Number

1

2

3

4

5

6

7

8

EPAD

Pin Name

RSTP

GND

/MR1

/RST

PDY

NC

/MR0

VIN

EPAD

Pin Function

Active-High Push-Pull Reset Output. This output changes from low-to-high when VIN drops below the

selected reset threshold or both manual reset pins are pulled low for the setup delay period. RSTP

remains high for the reset timeout delay after VIN exceeds the reset threshold plus hysteresis voltage

or the setup delay period has elapsed.

Supply Ground.

Active-Low Manual Reset Input. The MIC2786 has an internal 65kΩ pull-up resistor to VIN, while the

MIC2787 requires an external pull-up resistor to VIN if used with a push button. Pull this pin low to

assert and force a reset. Pulling both manual reset inputs low for the setup delay time causes one

reset output pulse for the reset timeout delay period. Connect to VIN if unused, do not leave floating.

Active-Low Open-Drain Reset Output. This output changes from high-to-low when VIN drops below

the selected reset threshold or both manual reset pins are pulled low for the setup delay period. /RST

remains low for the reset timeout delay after VIN exceeds the reset threshold or the setup delay has

elapsed and it requires an external pull-up resistor.

Programmable Delay Input with Tri-State Connection. When left open, setup delay is 2s, when

connected to GND, setup delay is 4s and when connected to VIN, setup delay is 6s.

No Connect. Leave pin floating.

Active Low Manual Reset Input. The MIC2786 has an internal 65kΩ pull-up resistor to VIN, while the

MIC2787 requires an external pull-up resistor to VIN if used with a push button. Pull this pin low to

assert and force a reset. Pulling both manual reset inputs low for the setup delay time causes one

reset output pulse for the reset timeout delay period. If unused, connect to VIN; do not leave floating.

Supply Voltage Pin. It is the input to the Supply Voltage monitor. When the supply voltage falls below

the reset threshold voltage, reset outputs (/RST and RSTP) are triggered immediately. When the

supply voltage rises above the reset threshold plus hysteresis voltage, the reset outputs remain

asserted for the duration of the reset timeout delay. A minimum 0.1μF decoupling ceramic capacitor

must be connected between VIN and GND close to the pins.

Exposed Pad. Connect to GND.

October 2011

3

M9999-102711-A

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