MIC2782 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – Dual-Input Push Button Reset IC

MIC2782
Dual-Input Push Button Reset IC
with Immediate and Delayed Outputs
General Description
Features
The MIC2782 is a two input, two output push-button reset
IC. It will generate a reset pulse for a factory-programmed
reset timeout period after both manual reset inputs have
been held to a logic-low for the factory-programmed setup
period. The MIC2782 also has an ANDOUT logic output
which will activate if both inputs are held low for longer
than a debounce time (1.5ms), and deactivate if one or
both inputs are released for longer than a debounce time
(1.5ms). The RESET and ANDOUT outputs are active-low,
open-drain NMOS outputs.
The MIC2782 operates over the 1.5V to 5.5V supply
voltage range, consuming 2.2µA of supply current at 3.3V.
The device features 65kΩ internal pull-up resistors on both
of the inputs (/MR1 and /MR2). The device offers factory
programmed setup periods of 6s, 8s, 10s, or 12s and reset
timeout periods of 0.5s, 1s or 2s. It is available in a space
saving, 6-bump, 0.4mm pitch, 0.8mm × 1.2mm wafer level
chip scale package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 1.5V to 5.5V operating supply voltage range
• 2.2µA supply current with /MR1, /MR2 not asserted
• Factory-programmed setup periods of 6s, 8s, 10s or 12s
• Factory-programmed reset timeout periods of 0.5s, 1s or
2s
• Integrated 65kΩ /MR1 and /MR2 pull-up resistors
• Supports single push-button reset with /MR1 tied to
/MR2
• RESET asserts after /MR1 and /MR2 are asserted low
for a setup period
• ANDOUT asserts after /MR1 and /MR2 are asserted low
for a debounce time (1.5ms)
• Open-drain RESET and ANDOUT outputs
• 6-bump, 0.4mm pitch, 0.8mm × 1.2mm wafer level chip
scale package (WLCSP)
Applications
• Smart phones
• Tablets
• eBooks
• Portable games
• Portable navigation device
____________________________________________________________________________________________________________________
Typical Application
VDD = 1.5V to 5.5V
0.1uF
VDD
100k 100k
/MR1
RESET
MIC2782
PUSH-BUTTON
SWITCH
PUSH-BUTTON
SWITCH
/MR2
ANDOUT
/MR1
/MR2
GND
LOAD SWITCH
or PMIC
/RESET
or µP
LOAD SWITCH
or PMIC
/RESET _{or µP}
.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
February 21, 2014
Revision 2.0