MAX705MJA Maxim Integrated Products, MAX705MJA Datasheet - Page 8
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MAX705MJA
Manufacturer Part Number
MAX705MJA
Description
Supervisory Circuits Single uPower Supervisor
Manufacturer
Maxim Integrated Products
Specifications of MAX705MJA
Number Of Voltages Monitored
1
Monitored Voltage
4.65 V
Undervoltage Threshold
4.5 V
Overvoltage Threshold
4.75 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
280 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.2 V
Supply Current (typ)
500 uA
Maximum Power Dissipation
640 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Package / Case
CDIP N
Minimum Operating Temperature
- 55 C
Power Fail Detection
Yes
Lead Free Status / Rohs Status
No
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX705MJA
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX705MJA/883
Manufacturer:
MAX
Quantity:
50
Company:
Part Number:
MAX705MJA/883B
Manufacturer:
EMCT
Quantity:
1 400
Low-Cost, µP Supervisory Circuits
Figure 5. RESET Valid to Ground Circuit
Figure 7. Monitoring a Negative Voltage
8
+5V
PFO
V-
_______________________________________________________________________________________
MR
R1
R2
+5V
+5V
0V
0V
5 1.25
R1
MAX70_
V-
1.25
RESET
PFI
R2
MAX70_
V TRIP
GND
V
CC
V
RESET
TRIP
PFO
, V TRIP
MR
R1
100k
0V
0
2N3904
TO P
100k
µPs with bidirectional reset pins, such as the Motorola
68HC11 series, can contend with the MAX705-MAX708
RESET output. If, for example, the RESET output is driven
high and the µP wants to pull it low, indeterminate logic
levels may result. To correct this, connect a 4.7k
resistor between the RESET output and the µP reset I/O,
as in Figure 8. Buffer the RESET output to other system
components.
Figure 6. Monitoring Both +5V and +12V
Figure 8. Interfacing to µPs with Bidirectional Reset I/O
130k
1%
1M
1%
MAX70_
+12V Reset
Threshold at +25°C
GND
V
+12V
CC
PARAMETER
RESET
+5V
BUFFERED RESET TO OTHER SYSTEM COMPONENTS
4.7k
PFI
V
CC
10.67 10.87 11.50
Bidirectional Reset Pins
MIN
Interfacing to µPs with
MAX70_
GND
TYP
RESET
PFO
MR
RESET
MAX
GND
V
CC
UNIT
P
V
TO P