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参数资料
| 型号： | 795R |
| 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： | 12/32页 |
| 文件大小： | 304K |
| 代理商： | 795R |
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STM690/704/795/802/804/805/806
12/32
Using a SuperCap as a Backup Power
Source
SuperCaps are capacitors with extremely high
capacitance values (e.g., order of 0.47F) for their
size. Figure
15
shows how to use a SuperCap as
a back-up power source. The SuperCap may be
connected through a diode to the V
CC
supply.
Since V
BAT
can exceed V
CC
while V
CC
is above
the reset threshold, there are no special precau-
tions when using these supervisors with a Super-
Cap.
Figure 15. Using a SuperCap
Negative-Going V
CC
Transients
The STM690/704/795/802/804/805/806 Supervi-
sors are relatively immune to negative-going V
CC
transients (glitches).
Figure 33., page 21
was gen-
erated using a negative pulse applied to V
CC
,
starting at V
RST
+ 0.3V and ending below the reset
threshold by the magnitude indicated (comparator
overdrive). The graph indicates the maximum
pulse width a negative V
CC
transient can have
without causing a reset pulse. As the magnitude of
the transient increases (further below the thresh-
old), the maximum allowable pulse width decreas-
es. Any combination of duration and overdrive
which lies under the curve will NOT generate a re-
set signal. Typically, a V
CC
transient that goes
100mV below the reset threshold and lasts 40μs or
less will not cause a reset pulse. A 0.1μF bypass
capacitor mounted as close as possible to the V
CC
pin provides additional transient immunity.
AI08805
STMXXX
V
BAT
V
CC
V
OUT
5V
GND
RST
To external SRAM
To μP
相关PDF资料 |
PDF描述 |
|---|---|
| 795S | 3V Supervisor with Battery Switchover |
| 795T | 3V Supervisor with Battery Switchover |
| 79600A | Three-Terminal Low Current Negative Voltage Regulators |
| 79L08AC | Three-Terminal Low Current Negative Voltage Regulators |
| 79L08ACD | Three-Terminal Low Current Negative Voltage Regulators |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 795S | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3V Supervisor with Battery Switchover |
| 795T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3V Supervisor with Battery Switchover |
| 795XFL-2 CAL | 制造商:Starrett Company 功能描述:CALIBRATED - 1-2" 25-50MM ELECTRONIC MICROMETER WITH OUTPUT |
| 795XFL-2 CAL DU | 制造商:Starrett Company 功能描述:CALIBRATED W/ DATA & UNCERTAINTIES - 1-2" 25-50MM ELECTRONIC MICROMETER WITH OUT |
| 796 | 功能描述:电路板硬件 - PCB NYL Rd Clr Hle Spcr 1.00 .312OD #10 RoHS:否 制造商:Harwin 类型:Shield Clip 长度:9.4 mm 螺纹大小: 外径: 材料:Beryllium Copper 电镀:Tin |
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