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MAX802SCPA Datasheet

  • MAX802SCPA

  • Maxim Integrated Products [3.0V/3.3V Microprocessor Supervi...

  • 102.06KB

  • MAXIM   MAXIM

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3.0V/3.3V Microprocessor Supervisory Circuits
MAX690T/S/R, 704T/S/R, 802T/S/R, 804鈥?06T/S/R
V
IN
R
1
PFI
R
2
R
3
V
CC
R
1
PFI
R
2
C1*
PFO
*OPTIONAL
TO
碌P
R
3
V
IN
V
CC
C1*
PFO
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
GND
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
GND
*OPTIONAL
TO
碌P
PFO
0V
0V
V
L
V
TRIP
V
H
V
IN
PFO
0V
0V
+
(
R R R
)
1
2
2
V
TRIP
V
H
V
IN
V
TRIP
= V
PFT
(
R
1
+ R
2
R
2
)
(
)
1
R
3
V
CC
R
3
V
TRIP
= V
PFT
V
H
= (V
PFT
+ V
PFH
) (R
1
)
V
L
= R
1
V
PFT
(
1
1
+
+
R
1
R
2
1
1
1
+
+
鈥?/div>
R
1
R
2
R
3
)
WHERE V
PFT
= 1.237V
V
PFH
= 10mV
V
H
= R
1
(V
PFT
+ V
PFH
)
1
(
R
+
1
1
1
+
R
2
R
3
)
鈥?(V
CC -
V
D
)
R
3
a
b
WHERE V
PFT
= 1.237V
V
PFH
= 10mV
V
D
= DIODE FORWARD VOLTAGE DROP
V
L
= V
TRIP
Figure 4. a) Adding Additional Hysteresis to the Power-Fail Comparator
3.0V OR 3.3V
R
1
PFI
R
2
V
CC
b) Shifting the Additional Hysteresis above V
PFT
V
IN
R
1
V
CC
3.0V OR 3.3V
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
GND
PFO
PFI
R
2
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
GND
PFO
MR
*
V-
V
CC
PFO
V
L
V
TRIP
= R
2
(V
PFT
+ V
PFH
)
V
L
= R
2
(V
PFT
)
1
V
TRIP
V
CC
R
1
V-
0V
V
TRIP
= V
PFT
WHERE V
PFT
= 1.237V
V
PFH
= 10mV
NOTE: V
TRIP
IS NEGATIVE
R
1
+
R
2
R
2
V
CC
PFO
V
TRIP
V
H
V
IN
(
R
1
+ R
2
)
鈥?/div>
1
V
CC
R
1
1
1
(
)
)
* MAX704T/S/R,
MAX806T/S/R ONLY
(
R
1
+ R
2
)
鈥?/div>
V
H
= (V
PFT
+ V
PFH
)
(
R
1
+
R
2
R
2
a
b
Figure 5. Using the Power-Fail Comparator to Monitor an Additional Power Supply
10
______________________________________________________________________________________

MAX802SCPA PDF文件相關(guān)型號(hào)

MAX802SCSA,MAX804SMJA

MAX802SCPA 產(chǎn)品屬性

  • Maxim Integrated Products

  • 1

  • 1 V to 5.5 V

  • 2.88 V

  • 3.02 V

  • Active Low, Push-Pull

  • Not Resettable

  • Watchdog

  • Backup

  • 200 ms

  • 5.5 V

  • 1 V

  • 50 uA

  • 727 mW

  • + 70 C

  • Through Hole

  • PDIP N

  • 0 C

  • Yes

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