AME8510 Analog Microelectronics, AME8510 Datasheet - Page 10

• Manufacturer Part Number: AME8510
• Description: Micropower uP Watch Dog Timer
• Manufacturer: Analog Microelectronics

AME8510 / 8520 / 8530
n Detailed Description(contd.)
Watchdog Input Current
8 A when driven high or low. So from a power dissipa-
tion point of view the duty cycle of the waveform at WDI
is unimportant. When the WDI pin is floating or tri-stated
the power supply current falls to less than 3.0 A.
Glitch Rejection
ing transients on the V
the duration of the transient the larger its amplitude may
be without triggering a reset. The “Glitch Rejection” chart
in the graphs section of this datasheet shows the rela-
tion between glitch amplitude and allowable glitch dura-
tion to avoid unintended resets.
Accurate Output State at Low V
threshold (<1.0V) the outputs of the AME8510/8520/8530
may become undefined. For parts with active low output
(RESETB) a resistor placed between RESETB and GND
on the order of 100K will ensure that the RESETB out-
put stays low when V
age of the part. In a like manner a resistor on the order of
100K
sure parts with active high output (RESET) will remain
high when V
part.
10
The watchdog input pin (WDI) typically sources/sinks
The AME8510/8520/8530 family will reject negative go-
With V
when placed between RESET and V
DD
voltage on the order of the MOS transistor
DD
AME, Inc.
is lower than the threshold voltage of the
DD
DD
line to some extent. The smaller
is lower than the threshold volt-
DD
DD
will en-
Micropower P Watch Dog Timer