- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371624 > 802R (意法半導體) 3V Supervisor with Battery Switchover PDF資料下載
參數(shù)資料
| 型號： | 802R |
| 廠商： | 意法半導體 |
| 英文描述： | 3V Supervisor with Battery Switchover |
| 中文描述： | 3V的監(jiān)控與電池切換 |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 304K |
| 代理商： | 802R |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 803 | Panel Mount for 6.3x32 mm Fuses |
| 8050SS-TO-92 | TRANSISTOR（ NPN ） |
| 8050S | TRANSISTOR（ NPN ） |
| 8050S-TO-92 | TRANSISTOR（ NPN ） |
| 80E-1C-15.5 | FO CERAMIC 62.5 PVC LC-LC 3M PATCH |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 802-RF1215.0M-A | 制造商:OSCILENT 制造商全稱:Oscilent Corporation 功能描述:RF Band Pass SAW Filter |
| 802-RF1220.0M-C | 制造商:OSCILENT 制造商全稱:Oscilent Corporation 功能描述:RF Band Pass SAW Filter |
| 802-RF1472.0M-A | 制造商:OSCILENT 制造商全稱:Oscilent Corporation 功能描述:RF Band Pass SAW Filter |
| 802-RF1575.42M-A | 制造商:OSCILENT 制造商全稱:Oscilent Corporation 功能描述:1575.42 MHz RF SAW Filter |
| 802-RF1575.42M-B | 制造商:OSCILENT 制造商全稱:Oscilent Corporation 功能描述:1575.42 MHz RF SAW Filter |
發(fā)布緊急采購，3分鐘左右您將得到回復。