参数资料
| 型号： | TLV803ZDBZT |
| 厂商： | Texas Instruments |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC VOLT SUPERVISR 2.25V SOT23-3 |
| 标准包装： | 250 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 120 ms |
| 电压 - 阀值： | 2.25V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 带卷 (TR) |
SBVS157B – APRIL 2011 – REVISED AUGUST 2011
MONITORING MULTIPLE SUPPLIES
Because the TLV803 has an open-drain output, multiple TLV803 outputs can be directly tied together to form a
logical OR-ing function for the RESET line. Only one pull-up resistor is required for this configuration. Figure 9
shows two TLV803s connected together to provide monitoring of a 3.3-V power rail and a 5.0-V power rail. A
reset is generated if either power rail falls below the threshold voltage of its corresponding TLV803.
5.0 V
0.1 m F
3.3 V
V DD
100 k W
V IO
V CORE
3.3 V
TLV803M
RESET
GND
Microprocessor
RST
0.1 m F
V DD
TLV803S
RESET
GND
Figure 9. Multiple Voltage Rail Monitoring
BIDIRECTIONAL RESET PINS
Some microcontrollers have bidirectional reset pins that act as both inputs and outputs. In a situation where the
TLV803 is pulling the RESET line low while the microcontroller is trying the force the RESET line high, a series
resistor should be placed between the output of the TLV803 and the RESET pin of the microcontroller to protect
against excessive current flow. Figure 10 shows the connection of the TLV803 to a microcontroller using a series
resistor to drive a bidirectional RESET line.
3.3 V
V CC
V DD
100 k W
Microprocessor
TLV803S
RESET
47 k W RST
GND
Figure 10. Connection to Bidirectional Reset Pin
Copyright ? 2011, Texas Instruments Incorporated
7
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| TLV809I50 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-Pin Supply Voltage Supervisors |
| TLV809I50DBVR | 功能描述:监控电路 3Pin Supply Vltg Sup 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 |
| TLV809I50DBVT | 功能描述:监控电路 3Pin Supply Vltg Sup 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 |
| TLV809I50DBZR | 功能描述:监控电路 3P Supply Vltg Super 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 |
| TLV809I50DBZT | 功能描述:监控电路 3P Supply Vltg Super 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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