MIC2788/MIC2789

Push-Button Reset IC

MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.

October 2011

M9999-102711-A

General Description

The MIC2788/MIC2789 are low-current, ultra-small, push-

button reset supervisors with long set-up delays. The

devices feature two manual reset inputs and two reset

outputs. The devices initiate a reset for the reset timeout

period when the /MR0 and /MR1 inputs are asserted low

for a period longer than the set-up delay. The two manual

reset inputs and long set-up period help to avoid

unintended system resets. Both manual reset inputs can

be tied together if a single push-button reset is desired.

The MIC2788 features integrated pull-up resistors on the

/MR0 and /MR1 inputs, while the MIC2789 requires

external pull-up resistors. The PDY input pin selects

between a 2s, 4s or 6s set-up period. Factory-programmed

reset timeout periods of 140ms (min.) and 240ms (min.)

are available. An active-low, open-drain reset output

(/RST) and an active-high, push-pull reset output (RSTP)

provide

flexibility

when

interfacing

to

various

microcontrollers, PMICs, or load switches.

The MIC2788/MIC2789 consume a quiescent current of

only 2.9µA and are offered in a tiny, space-saving 8-pin

thin MLF

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 1.6V to 5.5V operating voltage

• 2.9µA supply current when /MR0, /MR1 are not

asserted

• Asserting /MR0 and /MR1 for longer than set-up delay

asserts reset output for the reset timeout period

• Programmable delay (PDY) input selects 2.0s, 4.0s or

6.0s set-up delay

• Factory-programmed 140ms (min.) or 240ms (min.)

reset timeout period

• Integrated /MR0, /MR1 pull-up resistors (MIC2788)

• Dual Reset Outputs:

−

Open-drain active-low reset (/RST) output

−

Push-pull active-high reset (RSTP) output

• −40°C to 85°C ambient operating temperature range

Applications

• Smart phones

• MP3 players

• Portable navigation devices

• Set-top boxes (STBs)

• Tablets/pads

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Typical Application