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ON Semiconductor - Dual Input Reset Generator

Numéro de référence CAT872
Description Dual Input Reset Generator
Fabricant ON Semiconductor 
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CAT872 fiche technique
CAT871, CAT872
Dual Input Reset Generator
Description
CAT871, CAT872 are dual input reset generators designed to restart
microprocessor and microcontroller based systems when the
watchdog timer or other resetting mechanisms have become disabled
or failed.
CAT871, CAT872 monitor two inputs and output an active low reset
pulse after both inputs have been active (logic low) for a factory preset
minimum time. The reset pulse width is 2.2 ms for CAT871 and 70 ms
for CAT872. Releasing either input from its active state before the
minimum timeout period resets the internal timer and both inputs must
return to being active before the timer will restart with a fresh count
down.
CAT871, CAT872’s open drain output is capable of sinking up to
3 mA of current and may be wireOR’d with other open drain devices
to drive a common reset input.
Features
Operate on 1.65 V to 5.5 V Power Supplies
Ultra Low Quiescent Current: 10 nA (typical)
Schmitt Trigger Inputs
8 Factory Preset Delay Times from 0.5 s to 5 s to Choose From
Small mLLGA6 Package: 1.45 x 1.0 x 0.4 mm
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
Mobile Phones
PDAs
MP3 Players
Personal Navigation Devices
http://onsemi.com
1
ULLGA6
UL SUFFIX
CASE 613AF
MARKING DIAGRAM
XM
X = Specific Device Code
X = (J = CAT871, K = CAT872)
M = Date Code
PIN CONNECTIONS
MR1 1
VDD
MR2
RESET
NIC GND
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
Figure 1. Application Schematic
© Semiconductor Components Industries, LLC, 2011
November, 2011 Rev. 0
1
Publication Order Number:
CAT871/D

PagesPages 9
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