MAX6324 MAXIM [Maxim Integrated Products], MAX6324 Datasheet - Page 5

• Manufacturer Part Number: MAX6324
• Description: ?P Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset
• Manufacturer: MAXIM [Maxim Integrated Products]

(V
CC
PIN
1
2
3
4
5
6
= full range, T
WDPO
RESET
NAME
GND
WDI
V
MR
CC
A
WDPO
_______________________________________________________________________________________
= +25°C, unless otherwise noted.)
WDI
µP Supervisory Circuits with Windowed
Active-Low, Manual Reset Input. When MR is asserted low, RESET is asserted low, the internal watchdog
timer is reset to zero, and WDPO is reset to high impedance (open drain). After the rising edge of MR,
RESET is asserted for at least 100ms. Leave MR unconnected or connect to V
Ground
Watchdog Input. The internal watchdog timer clears to zero on the falling edge of WDI or when RESET goes
high. If WDI sees another falling edge within the factory-trimmed watchdog window, WDPO will remain
unasserted. Transitions outside this window, either faster or slower, will cause WDPO to pulse low for 1ms
(typ).
Supply Voltage for the Device. Input for V
(min) capacitor.
Watchdog Pulse Output. The open-drain WDPO output is pulsed low for 1ms (typ) upon detection of a fast
or slow watchdog fault. WDPO is only active when RESET is high.
Active-Low. Reset is asserted when V
for the duration of the reset timeout period. The MAX6323 has a push-pull output and the MAX6324 has an
open-drain output. Connect a pullup resistor from RESET to any supply voltage up to +6V.
(Min/Max) Watchdog and Manual Reset
FAST WATCHDOG TIMEOUT PERIOD
500µs/div
MAX6323AUT23
Typical Operating Characteristics (continued)
MAX6323/24-10
2V/div
2V/div
CC
drops below V
CC
reset monitor. For noisy systems, bypass V
WDPO
WDI
FUNCTION
SLOW WATCHDOG TIMEOUT PERIOD
TH
and remains asserted until V
5ms/div
MAX6323AUT23
MAX6323/24-11
CC
if unused.
Pin Description
2V/div
2V/div
CC
CC
rises above V
with a 500pF
TH
5