Datasheet

STM705, STM706, STM707, STM708, STM813L Description
Doc ID 10520 Rev 9 5/33
1 Description
The STM705/706/707/708/813L supervisors are self-contained devices which provide
microprocessor supervisory functions. A precision voltage reference and comparator
monitors the V
CC
input for an out-of-tolerance condition. When an invalid V
CC
condition
occurs, the reset output (RST
) is forced low (or high in the case of RST).
These devices also offer a watchdog timer (except for STM707/708) as well as a power-fail
comparator to provide the system with an early warning of impending power failure.
These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin
TSSOP package.
Figure 1. Logic diagram (STM705/706/813L)
1. For STM705/706 only.
2. For STM813L only.
Figure 2. Logic diagram (STM707/708)
AI08825
V
CC
STM705/706;
STM813L
V
SS
WDO
RST
(1)
WDI
PFI
MR
RST
(2)
PFO
AI08826
V
CC
STM707/708
V
SS
RST
RST
MR
PFI
PFO