RESET TIMER WITH CONFIGURABLE DELAY
Enhanced Reset Timers for Mobile Devices
Due to the increasing consumer demand for feature-rich smart phones and the myriad of user applications, more
handsets are experiencing software malfunctions and/or phone lock-up due to the inability to test all software on
every handset platform. This phenomenon is commonly referred to as the “white screen of death.” Fairchild offers
a family of reset timers which allows the user to reset the handset with the push-of-a-button, eliminating the need to
physically remove the battery or return the phone to its manufacturer.
Fairchild’s reset timers are currently available in four sizes: 2.0mm x 2.0mm MLP, 1.4mm x 1.8mm ultrathin MLP,
1.0mm x 1.45mm MicroPak™ and 1.0mm x 1.0mm MicroPak2™ packages.
Select the desired
time required to
reset the device
between 3 and 11
seconds. Longer
delays prevent
unintended resets
Single- or DualSwitch Option
Customize your
application by
designing the
reset to require
either a one or
two button input.
Low-Power
Consumption
Drawing minimal
amounts of current
when inactive
supports the ultra
low-power
consumption
requirements of
mobile devices.
Fairchild’s reset
timers feature two
outputs: a push-pull
output with 0.5mA
drive and an opendrain output with
0.5mA push-pull drive.
Minimal risk from
electrostatic
discharge with
built-in 4kV HDM
and 2kV CBM
protection.
Simple test
mode activation
makes quality
assurance quick
and effective.
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Reset Timer Features
Fairchild’s reset timers are configurable in several programmable delay times – 3, 3.75,
4.5, 6, 7.5, 10, and 11.25 seconds. The longer delay times eliminate an inadvertent reset,
due to an accidental key press by the user. Fairchild reset timers offer single- or dual-button
reset capability. The devices feature two outputs; a push-pull output with 0.5mA drive and
an open-drain output with 0.5mA pull-down drive. The reset timers draw minimal ICC current
when inactive and function over a wide power supply range of 1.65V to 5.0V.
Delay Times (Seconds)
Part
Number
Single- or
Dual-Button
Reset
Outputs
FT7522
Single
1
FTL7522
Single
FT7521
Single
FT7511
Single
FT8010
Dual
(optional)
2
Single
1
Dual
(optional)
2
FT10001
FT3001
Part
Number
Output
Pulse
(mS)
OpenDrain
Output
x
400
x
Fixed Delay, 400mS Reset Pulse
1
x
400
x
Low ICCT, Direct Interface with Lower Voltage Chips
1
x
400
x
Fixed Delay, Integrated Pull-up Resistor
1
x
80
x
Fixed Delay, 80mS Reset Pulse
x
User
Configured
x
530
x
400
x
ICC
(Timer Inactive)
(μA)
3/3.75/
4.5/6
7.5
10
11.25
x
x
x
ICC
(Timer Active)
(μA)
0 Second
Test Mode
ESD
HDM
(kV)
CDM
(kV)
Integrated
Pull-up
Resistor
PushPull
Output
x
Notes
Configurable Delay Time and Output Pulse
Fixed Long Delay Time, Integrated Pull-up Resistor
x
Configurable Short Delay times
Package
FT7522L6X
1
100
x
4
2
6-Lead MicroPak, 1.0 x 1.45 x .55mm Package, .5mm Pitch
FTL7522L6X
1
100
x
4
2
6-Lead MicroPak, 1.0 x 1.45 x .55mm Package, .5mm Pitch
FT7521L6X
1
200
x
4
2
FT7511L6X
1
100
x
4
2
x
6-Lead MicroPak, 1.0 x 1.45 x .55mm Package, .5mm Pitch
6-Lead MicroPak, 1.0 x 1.45 x .55mm Package, .5mm Pitch
FT8010UMX
20
100
4
2
10-Lead Ultrathin MLP, 1.4 x 1.8 x 0.55mm Package, 0.40mm Pitch
FT8010MPX
20
100
4
2
8-Lead MLP, 2.0 x 2.0 x 0.8mm Package, 0.5mm Pitch
FT10001L6X
1
200
x
4
2
x
6-Lead MicroPak, 1.0 x 1.45 x .55mm Package, .5mm Pitch
FT10001FHX
1
200
x
4
2
x
6-Lead MicroPak2, 1.0 x 1.0 x .55mm Package, .35mm Pitch
FT3001UMX
1
100
4
2
10-Lead Ultrathin MLP, 1.4 x 1.8 x 0.55mm Package, 0.40mm Pitch
FT3001MPX
1
100
4
2
8-Lead MLP, 2.0 x 2.0 x 0.8mm Package, 0.5mm Pitch
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information, please see: www.fairchildsemi.com/legal
Lit. No. 100030-002 © 2012 Fairchild Semiconductor. All Rights Reserved.
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