MIC2788/MIC2789
Push-Button Reset IC
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 (2mm x 2mm x 0.55mm) package.
Data sheets and support documentation can be found on
Micrel’s web site at:
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
•
8-pin 2mm x 2mm x 0.55mm thin MLF
®
package
Applications
•
•
•
•
•
Smart phones
MP3 players
Portable navigation devices
Set-top boxes (STBs)
Tablets/pads
_________________________________________________________________________________________________________________________
Typical Application
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technologies, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
October 2011
M9999-102711-A
MICREL [ MICREL SEMICONDUCTOR ]
