The ADM705 / ADM706 / ADM707 / ADM708 microprocessor
supervisory circuits are suitable for monitoring 5 V power
supplies/batteries and microprocessor activity.
The ADM705 / ADM706 provide power-supply monitoring
circuitry that generate a reset output during power-up, powerdown,
and brownout conditions. The reset output remains
operational with VCC as low as 1 V. Independent watchdog
monitoring circuitry is also provided. This is activated if the
watchdog input has not been toggled within 1.60 sec.
In addition, there is a 1.25 V threshold detector to warn of
power failures, to detect low battery conditions, or to monitor an
additional power supply. An active low, debounced manual reset
input (MR) is also included.
The ADM705 and ADM706 are identical except for the reset
threshold monitor levels, which are 4.65 V and 4.40 V, respectively.
The ADM707 and ADM708 provide a similar functionality to
the ADM705 and ADM706 and only differ in that a watchdog
timer function is not available. Instead, an active high reset
output (RESET) is available as well as the active low reset output
(RESET). The ADM707 and ADM708 are identical except for
the reset threshold monitor levels, which are 4.65 V and 4.40 V,
respectively.
All devices are available in narrow 8-lead PDIP and 8-lead SOIC
packages.
APPLICATIONS
- Microprocessor systems
- Computers
- Controllers
- Intelligent instruments
- Critical microprocessor supply monitoring
