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参数资料
| 型号： | STM704TDS6F |
| 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： | 12/31页 |
| 文件大小： | 194K |
| 代理商： | STM704TDS6F |
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STM690/704/795/802/804/805/806
12/31
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 32., page 20
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
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PDF描述 |
|---|---|
| STM704TM6E | 3V Supervisor with Battery Switchover |
| STM704TM6F | 3V Supervisor with Battery Switchover |
| STM795RDS6E | 3V Supervisor with Battery Switchover |
| STM795RDS6F | 3V Supervisor with Battery Switchover |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| STM704TM6E | 功能描述:监控电路 3V Supervisor w/Battery Switchover RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| STM704TM6F | 功能描述:监控电路 4.40V w/Batt Switch RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| STM705 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V Supervisor |
| STM705_10 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 V supervisor |
| STM705ADS6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 V supervisor |
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