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PDF FP6809 Data sheet ( Hoja de datos )

Número de pieza FP6809
Descripción 3-Pin Microprocessor Reset Circuits
Fabricantes Fiti 
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fitipower integrated technology lnc.
FP6809/6810
3-Pin Microprocessor
Reset Circuits
Description
The FP6809 and FP6810 are cost-effective system
supervisory circuits which are designed to monitor
micro-processor voltage and VCC in digital systems.
They provide a reset signal to the host processor
when necessary.
These circuits assert a reset signal whenever the
VCC supply voltage declines below a preset
threshold. They keep reset signal asserted for at
least 140ms after VCC has risen above the reset
threshold.
The FP6809-N has an open-drain output stage
which requires a pull-up resistor while FP6809-C
and FP6810-C have push-pull outputs. The
FP6809 has an active-low
output while the
FP6810 has an active-high RESET output.
The FP6809 and FP6810 are optimized to reject
fast transient glitches on the VCC line. Low supply
current makes these devices suitable for portable
equipments.
Features
Precision Monitoring of Power-Supply Voltage
140ms Guaranteed Minimum Reset Output
Duration
Low Supply Current
VCC Transient Immunity
Small SOT-23-3 Package
No External Components
Guaranteed Reset Valid to VCC=1V
Available in Three Output Configurations
Open-Drain
Output (FP6809-N)
Push-Pull
Output (FP6809-C)
Push-Pull RESET Output (FP6810-C)
RoHS Compliant
Applications
Computer
Battery Powered Equipment
Microprocessor Power Supply Monitoring
Embedded System
Automotive
Pin Assignments
S3 Package (SOT-23-3)
VCC
3
1
2
GND RESET
(RESET)
Figure 1. Pin Assignment of FP6809/FP6810
Ordering Information
FP6809/10-□□□□□
TR: Tape/Reel
P: Green
G: Green
Package Type
S3: SOT-23-3
N: Open-Drain (FP6809 only)
C: Push-Pull
Reset Voltage
23: 2.32V 40: 4.00V
26: 2.63V 44: 4.38V
29: 2.93V 46: 4.63V
31: 3.08V
FP6809: Active Low Reset
FP6810: Active High Reset
Note1Please consult Fitipower sales office or authorized
distributors for availability of special reset voltages.
FP6809/6810-1.5-JAN-2013
1

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FP6809 pdf
fitipower integrated technology lnc.
FP6809/6810
Typical Performance Curves
1.005
1.004
1.003
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
-40
-20
0 20 40 60
Temperature (oC)
80 100
Figure 4. Normalized Reset Threshold vs. Temperature
550
500
450
400
350
300
250
200
150
-40 -20
0
20 40 60 80
Temperature(oC)
Figure 5. Power-up Timeout vs. Temperature
Figure 6. Power-Up
Timeout Waveforms;
CH1VCC CH2
5
FP6809_26,Vcc=3.3V
FP6809_31, Vcc=3.3V
4 FP6809_46, Vcc=5V
3
2
1
0
-40
-20
0 20 40
Temperatrue(oC)
60
Figure 8. Supply Current vs. Temperature
80
FP6809/6810-1.5-JAN-2013
Figure 7. Power-Down
CH1VCC CH2
50 FP6809_26
FP6809_31
FP6809_46
40
Delay Waveforms;
30
20
10
0
0.0 0.5 1.0 1.5 2.0
VDS(v)
Figure 9. Output Sinking Capability
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