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参数资料
| 型号： | 795T |
| 厂商： | 意法半导体 |
| 英文描述： | 3V Supervisor with Battery Switchover |
| 中文描述： | 3V的监控与电池切换 |
| 文件页数： | 4/32页 |
| 文件大小： | 304K |
| 代理商： | 795T |
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STM690/704/795/802/804/805/806
4/32
SUMMARY DESCRIPTION
The STM690/704/795/802/804/805/806 Supervi-
sors are self-contained devices which provide mi-
croprocessor supervisory functions with the ability
to
non-volatize
and
LPSRAM. 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
write-protect
external
a watchdog timer (except for STM704/795/806) as
well as a power-fail comparator (except for
STM795) 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 2. Logic Diagram (STM690/802/804/805)
Note: 1. For STM804/805, reset output is active-high and open
drain.
Figure 3. Logic Diagram (STM704/806)
Figure 4. Logic Diagram (STM795)
Table 2. Signal Names
Note: 1. Open drain for STM804/805 only.
2. STM795
AI08846
V
CC
V
BAT
STM690/
802/804/
805
V
SS
V
OUT
RST(RST)
(1)
WDI
PFI
PFO
AI08847
V
CC
V
BAT
STM704
STM806
V
SS
V
OUT
RST
MR
PFI
PFO
MR
Push-button Reset Input
WDI
Watchdog Input
RST
Active-Low Reset Output
RST
(1)
Active-High Reset Output
E
(2)
Chip Enable Input
E
CON(2)
Conditioned Chip Enable Output
Vccsw
(2)
V
CC
Switch Output
V
OUT
Supply Voltage Output
V
CC
Supply Voltage
V
BAT
Back-up Supply Voltage
PFI
Power-fail Input
PFO
Power-fail Output
V
SS
Ground
AI08848
V
CC
V
BAT
STM795
V
SS
V
OUT
RST
V
CCSW
E
E
CON
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