STM706T/S/R; STM706P; STM708T/S/R
SUMMARY DESCRIPTION
The STM70x Supervisors are self-contained de-
vices which provide microprocessor supervisory
functions. A precision voltage reference and com-
parator monitors the V
CC
input for an out-of-toler-
ance 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 STM708T/S/R) as well as a power-fail compar-
ator to provide the system with an early warning of
impending power failure.
The STM706P is identical to the STM706R, except
its reset output is active-high.
These devices are available in a standard 8-pin
SOIC package or a space-saving 8-pin TSSOP
package.
Figure 2. Logic Diagram (STM706T/S/R and
STM706P)
V
CC
Table 2. Signal Names
MR
WDI
WDO
RST
Push-button Reset Input
Watchdog Input
Watchdog Output
Active-Low Reset Output
Active-High Reset Output
Supply Voltage
Power-fail Input
Power-fail Output
Ground
No Connect
WDI
MR
PFI
STM706T/S/R,
STM706P
WDO
RST (RST)
(1)
PFO
RST
(1)
V
CC
PFI
PFO
V
SS
AI08841
V
SS
NC
Note: 1. For STM706P only.
Note: 1. For STM706P and STM708T/S/R only.
Figure 3. Logic Diagram (STM708T/S/R)
V
CC
RST
MR
STM708T/S/R
PFI
PFO
RST
V
SS
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