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CAT872 Datasheet

Dual Input Reset Generator

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CAT872 pdf
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


  ON Semiconductor Electronic Components Datasheet  

CAT872 Datasheet

Dual Input Reset Generator

No Preview Available !

CAT872 pdf
CAT871, CAT872
FUNCTIONAL BLOCK DIAGRAM
VDD
MR2
MR1
Delay Timer
RESET
Pulse
Generator
RESET
GND
Figure 2. Functional Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
MR1
Manual reset input #1. CMOS input.
2
MR2
Manual reset input #2. CMOS input.
3 NIC No Internal Connection. A voltage or signal applied to this pin will have no effect on device operation.
4
GND
System Ground.
5
RESET
Reset Output. Activelow open drain output.
6
VDD
Positive Power Supply.
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage Range
Output Voltage Range
VDD
VOUT
0.3 to 6
0.3 to 6
or (VDD + 0.3), whichever is lower
V
V
Input Voltage; MR2, MR1
VIN
0.3 to 6
V
or (VDD + 0.3), whichever is lower
Maximum Junction Temperature
Output Current; RESET
Storage Temperature Range
ESD Capability, Human Body Model (Note 1)
ESD Capability, Machine Model (Note 1)
Lead Temperature Soldering
Reflow (SMD Styles Only), PbFree Versions (Note 2)
TJ(max)
IOUT
TSTG
ESDHBM
ESDMM
TSLD
150
10
65 to 150
2
200
260
°C
mA
°C
kV
V
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AECQ100002 (EIA/JESD22A114)
ESD Machine Model tested per AECQ100003 (EIA/JESD22A115)
Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78
2. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
http://onsemi.com
2


Part Number CAT872
Description Dual Input Reset Generator
Maker ON Semiconductor
Total Page 9 Pages
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