MAX6361PUT44-T Maxim Integrated, MAX6361PUT44-T Datasheet - Page 8

• Manufacturer Part Number: MAX6361PUT44-T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6361, MAX6362, MAX6363, MAX6364r

Specifications of MAX6361PUT44-T

• Number Of Voltages Monitored: 1
• Monitored Voltage: 2.5 V, 3 V, 3.3 V, 5 V
• Undervoltage Threshold: 4.25 V
• Overvoltage Threshold: 4.5 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: Backup
• Power-up Reset Delay (typ): 280 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Chip Enable Signals: No
• Maximum Power Dissipation: 696 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 15 uA
• Supply Voltage - Min: 0 V

To help the watchdog timer monitor software execution
more closely, set and reset the watchdog input at dif-
ferent points in the program, rather than “pulsing” the
watchdog input low-high-low. This technique avoids a
“stuck” loop, in which the watchdog timer would contin-
ue to be reset within the loop, keeping the watchdog
from timing out. Figure 2 shows an example of a flow
diagram where the I/O driving the WDI is set low at the
beginning of the program, set high at the beginning of
every subroutine or loop, then set low again when the
program returns to the beginning. If the program
should “hang” in any subroutine, the problem would
quickly be corrected, since the I/O is continually set low
and the watchdog timer is allowed to time out, trigger-
ing a reset.
SOT23, Low-Power µP Supervisory Circuits
with Battery Backup
8
_______________________________________________________________________________________
Watchdog Software Considerations
(MAX6362 Only)
Figure 2. Watchdog Flow Diagram
OR PROGRAM LOOP
SUBROUTINE
SET WDI
RETURN
START
LOW
HIGH
END
WDI
SET