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| 型号： | SP691ACT-L |
| 厂商： | Exar Corporation |
| 文件页数： | 14/24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
V CC
V BATT
1
13
CE IN
V BATT
2.8V
R 1
4
12
CE OUT
C LOAD
+2.0V
to
+5.5V
PFI
R 2
GND
PFO
LOW BATT
GND
Figure 22. Chip Enable Propagation Delay Test Circuit
Chip-Enable Output
In the enabled mode, the impedance of CE OUT
is equivalent to 65 ? in series with the source
driving CE IN . In the disabled mode, the 65 ?
transmission gate is off and CE OUT is actively
pulled to V OUT . This source turns off when the
transmission gate is enabled.
LOWLINE Output
LOWLINE is the buffered output pin of the
reset threshold comparator. Refer to Figure 16 .
LOWLINE typically sinks 3.2mA at 0.1V. For
normal operation where V CC is above the reset
threshold, LOWLINE is pulled to V OUT .
Power-Fail Comparator
The power-fail comparator is an uncommitted
comparator that has no effect on the other
functions of the SP691A/693A/800L/800M
devices. Common uses include low battery
detection, as found in Figure 23 , and early
power-fail detection when the unregulated power
is easily accessible as shown in Figure 17 .
Power-Fail Input
The Power-Fail Input (PFI) has a guaranteed
input leakage of +25nA max over temperature.
The typical comparator delay is 25 μ s from V IL
to V OL (power failing), and 60 μ s from V IH to
V OH (power being restored). Connect this
input to ground if PFI is not used.
Figure 23. Low-Battery Indicator Circuit
Power-Fail Output
The Power-Fail Output (PFO) goes low when
PFI goes below 1.25V. It sinks 3.2mA with a
saturation voltage of 0.1V. With PFI above
1.25V, PFO is actively pulled to V OUT . PFO
can be used to generate an NMI for the μ P, as
shown in Figure 17 .
Battery-Backup Mode
The SP691A/693A/800L/800M requires two
conditions to switch to battery-backup mode:
1) V CC must be below the reset threshold; 2)
V CC must be below V BATT . Table 2 lists the
status of the inputs and outputs in battery-
backup mode.
Battery-On Output
The Battery On Output (BATT ON) indicates
the status of the internal V CC /battery-switchover
comparator, which controls the internal V CC and
V BATT switches. For V CC greater that V BATT
(ignoring the small hysteresis effect), BATT ON
is a logic low. For V CC less than V BATT , BATT
ON is a logic high. Use BATT ON to indicate
battery-switchover status or to supply base drive
to an external pass transistor for higher-current
applications. Refer to Figure 17.
Date: 4/18/05
SP691A/693A/800L/800M Low Power Microprocessor Supervisor with Battery Switch-Over ? Copyright 2005 Sipex Corporation
14
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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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