MAX804TCSA-T Maxim Integrated, MAX804TCSA-T Datasheet - Page 10
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MAX804TCSA-T
Manufacturer Part Number
MAX804TCSA-T
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 MAX804TCSA-T
Number Of Voltages Monitored
1
Monitored Voltage
1 V to 5.5 V
Undervoltage Threshold
3 V
Overvoltage Threshold
3.14 V
Output Type
Active High, Active Low, Open Drain
Manual Reset
Not Resettable
Watchdog
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
SMD/SMT
Package / Case
SOIC-8 Narrow
Chip Enable Signals
No
Maximum Power Dissipation
471 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