MAX806SCPA Maxim Integrated, MAX806SCPA Datasheet - Page 10
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MAX806SCPA
Manufacturer Part Number
MAX806SCPA
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX690R, MAX690S, MAX690T, MAX704R, MAX704S, MAX704T, MAX802, MAX802R, MAX802S, MAX802T, MAX804, MAX804R, MAX804S, MAX804T, MAX805, MAX805R, MAX805S, MAX805T, MAX806, MAX806R, MAX806S, MAX806Tr
Datasheet
1.MAX805TEPA.pdf
(12 pages)
Specifications of MAX806SCPA
Number Of Voltages Monitored
1
Monitored Voltage
1 V to 5.5 V
Undervoltage Threshold
2.88 V
Overvoltage Threshold
3.02 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
Backup
Power-up Reset Delay (typ)
200 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
Through Hole
Package / Case
PDIP N
Chip Enable Signals
No
Maximum Power Dissipation
727 mW
Minimum Operating Temperature
0 C
Power Fail Detection
Yes
Supply Current (typ)
50 uA
Supply Voltage - Min
1 V
3.0V/3.3V Microprocessor Supervisory Circuits
Figure 4. a) Adding Additional Hysteresis to the Power-Fail Comparator
Figure 5. Using the Power-Fail Comparator to Monitor an Additional Power Supply
10
a
a
______________________________________________________________________________________
PFO
V
V
TRIP
CC
V
L
PFO
= R
= R
R
R
R
R
V
0V
V
2
2
V
1
2
1
2
TRIP
H
L
V
(V
= (V
(V
V-
= R
0V
IN
PFT
PFT
= V
1
PFT
PFT
+ V
)
V
(
PFT
+ V
PFH
1
R
(
1
R
PFH
C1*
1
+
)
(
R
+ R
(
1
R
) (R
2
1
R
TO μP
1
1
R
2
2
+
1
1
)
)
)
+
1
R
–
R
(
PFI
2
3
R
1
R
1
V
+
2
1
CC
R
V
V
L
1
+
L
)
1
R
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
PFI
PFO
–
3
1
R
)
2
V
V
CC
TRIP
R
–
V
+
V
GND
1
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
TRIP
CC
V
1
R
CC
R
3
3
3.0V OR 3.3V
)
GND
V
CC
V
WHERE
H
WHERE
NOTE: V
PFO
0V
V
V
PFT
PFH
TRIP
V
V
*OPTIONAL
PFT
PFH
= 1.237V
= 10mV
IS NEGATIVE
= 1.237V
= 10mV
V
IN
V-
b
b
b) Shifting the Additional Hysteresis above V
PFO
V
CC
V
V
TRIP
H
= (V
PFO
V
R
R
V
=
1
2
TRIP
WHERE
R
R
H
PFT
0V
1
2
V
V
= R
PFT
IN
V
= V
+ V
0V
IN
1
PFT
(
(V
V
V
PFH
R
PFT
PFH
PFT
1
V
V
R
D
(
L
+ R
)
R
2
(
+ V
1
= 1.237V
= DIODE FORWARD VOLTAGE DROP
= V
= 10mV
2
R
R
+ R
C1*
1
2
TRIP
)
PFH
R
+ R
2
2
TO μP
)
)
2
V
(
PFI
TRIP
)
R
1
R
3
1
V
+
TRIP
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
PFI
PFO
1
R
V
2
H
+
V
GND
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
CC
1
R
3
3.0V OR 3.3V
)
GND
V
–
CC
V
(V
H
* MAX704T/S/R,
CC -
MAX806T/S/R ONLY
PFO
MR
R
3
V
D
PFT
)
*OPTIONAL
*
V
V
IN
IN