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PDF CAT871 Data sheet ( Hoja de datos )
| Número de pieza | CAT871 | |
| Descripción | Dual Input Reset Generator | |
| Fabricantes | ON Semiconductor | |
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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 wire−OR’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 mLLGA−6 Package: 1.45 x 1.0 x 0.4 mm
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Mobile Phones
• PDAs
• MP3 Players
• Personal Navigation Devices
http://onsemi.com
1
ULLGA−6
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
1 page  
CAT871, CAT872
TYPICAL CHARACTERISTICS
30 25
25
20
15
85°C
10
25°C −40°C
5
0
01 23 4 5
VDD (V)
Figure 7. IDD vs. VDD (MR1 = MR2 = 0)
6
20
15
10
5
0
1
23 45
VDD (V)
Figure 8. IMR2 @ MR2 = 0
6
2.6
2.5
2.4
2.3 −40°C
2.2 25°C
2.1
85°C
2.0
1.9
1.8
1
2 34 5
VDD (V)
Figure 9. tR vs. VDD for CAT871
2.6
2.5
2.4
2.3
2.2 5.6 V
2.1 3.2 V
2.0 1.6 V
1.9
1.8
6 −50 −25 0 25 50 75 100 125 150
TEMPERATURE (°C)
Figure 10. tR vs. Temperature for CAT871
83
81
79
77
75
73
71 −40°C
69 25°C
67
65
90°C
63
61
59
57
01 23 4 5
VDD (V)
Figure 11. Reset Pulse Width for CAT872
6
http://onsemi.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet CAT871.PDF ] | |
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