Datasheet

STM6321, STM6322, STM6821, STM6822, STM6823, STM6824, STM6825 Description
Doc ID 11110 Rev 12 5/31
1 Description
The STM6xxx 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 STM6322/6825) and/or a push-button (MR
) reset input.
These devices are available in a standard 5-pin SOT23 package.
Figure 1. Logic diagram (STM6821/6822/6823)
1. For STM6821 only.
Figure 2. Logic diagram (STM6321/6322/6824/6825)
1. For STM6321/6824.
Table 2. Signal names
Name Function
MR
Push-button reset input
WDI Watchdog input
RST
Active low reset output
RST Active high reset output
V
CC
Supply voltage
V
SS
Ground
AI09128
V
CC
STM6XXX
V
SS
RST (RST)
(1)
WDI
MR
AI09129
V
CC
STM6XXX
V
SS
RST
RST
(WDI)
(1)
MR