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| 型号： | SP691ACT-L |
| 厂商： | Exar Corporation |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU LP 16WSOIC |
| 标准包装： | 41 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 其它名称： | SP691ACT-L-ND |
+5V
1N4148
3
Vcc
2) Battery-backup mode where V CC is typically
within 0.7V below V BATT . All circuitry is
powered from V BATT and the supply
current from the battery is typically less
than 5 μ A.
0.47F
1
V BATT
V OUT
2
3) Battery-backup mode where V CC is less than
V BATT by at least 0.7V. V BATT supply
current is less than 1 μ A max.
Corporation
Using High Capacity Capacitor with the
GND
4
Figure 25. High Capacity Capacitor on V BATT
Continuous current should be limited to 25mA
and peak currents (only during power-up)
limited to 250mA. The reverse leakage of this
input is less than 1 μ A over temperature and
supply voltage.
SP691A/693A/800L/800M Series
V BATT has the same operating voltage range as
V CC , and the battery-switchover threshold
voltages are typically +30mV centered at V BATT ,
allowing use of a capacitor and a simple
charging circuit as a backup source. Refer to
Figure 25 .
If V CC is above the reset threshold and V BATT
is 0.5V above V CC , current flows to V OUT and
V CC from V BATT until the voltage at V BATT is
less than 0.5V above V CC .
Output Supply Voltage
The Output Supply Voltage (V OUT ) supplies all
the current to the external system and internal
circuitry. All open-circuit outputs will assume
the V OUT voltage in their high states rather than
the V CC voltage. At the maximum source
current of 250mA, V OUT will typically be
150mV below V CC . V OUT should be decoupled
with 0.1 μ F capacitor.
TYPICAL APPLICATIONS
The SP691A/693A/800L/800M devices are not
short-circuit protected. Shorting V OUT to
ground, other than power-up transients such as
charging a decoupling capacitor, may destroy
the device. All open-circuit outputs swing
between V OUT and GND rather than V CC and
GND. If long leads connect to the chip inputs,
ensure that these lines are free from ringing and
other conditions that would forward bias the
chip's protection diodes.
There are three distinct modes of operation:
1) Normal operating mode with all circuitry
powered from V CC . Typical supply current
from V CC is 35 μ A, while only leakage
currents flow from the battery.
Leakage current through the capacitor charging
diode and SP691A/693A/800L/800M internal
power diode eventually discharges the capacitor
to V CC . Also, if V CC and V BATT start from 0.5V
above the reset threshold and power is lost at
V CC , the capacitor on V BATT discharges through
V CC until V BATT reaches the reset threshold; the
SP691A/693A/800L/800M devices then switch
to battery-backup mode.
Using Separate Power Supplies for V BATT
and V CC
If using separate power supplies for V CC and
V BATT , V BATT must be less than 0.3V above
V CC when V CC is above the reset threshold.
As described in the previous section, if V BATT
exceeds this limit and power is lost at V CC ,
current flows continuously from V BATT to
V CC via the V BATT -to-V OUT diode and the
V OUT -to-V CC switch until the circuit is broken.
Refer to Figure 24 .
Alternative Chip-Enable Gating
Using memory devices with CE and CE inputs
allows the CE loop of the SP691A/693A/800L/
800M series to be bypassed. To do this,
connect CE IN to ground, pull up CE OUT to V OUT ,
Date: 4/18/05
SP691A/693A/800L/800M Low Power Microprocessor Supervisor with Battery Switch-Over ? Copyright 2005 Sipex Corporation
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP691ACT-L/TR | 功能描述:监控电路 LW PWR MICRO 5.5V 25mA-250mA BAT SW/OV 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 |
| SP691AEN | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP691AEN/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory with Battery Switch-Over |
| SP691AEN-L | 功能描述:监控电路 LW PWR MICRO 5.5V 25mA-250mA BAT SW/OV 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 |
| SP691AEN-L/TR | 功能描述:监控电路 LW PWR MICRO 5.5V 25mA-250mA BAT SW/OV 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 |
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