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参数资料
| 型号： | DS1831AS/T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC MULTIMON 5V/3.3V WDOG 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | MicroMonitor™ |
| 类型： | 多压监控器 |
| 监视电压数目： | 3 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 10 ms；100 ms；1,000 ms |
| 电压 - 阀值： | 3.3V，5V，可调 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
DS1831/A/B
NON-MASKABLE INTERRUPT CIRCUIT EXAMPLE Figure 9
V SENSE2
V SENSE1
V CC
R1
PBRST 5V
PBRST 3.3V
R3
R2
IN1
DS1831
NMI1
10 K W
IN2
NMI2
R4
GND
MPBRST
Example:
V SENSE1 = 11.50V trip point V SENSE1 =
R1 + R2
R2
X 1.25V
Therefore:
11.50V =
R1 + 100 k W
100 k W
X 1.25V
Resulting In: R1 = 820k W
Repeat the same steps to solve for R3 and R4 with V SENSE2 .
OPERATION - WATCHDOG TIMER
The watchdog timer function (DS1831A only) forces the WDS signal active (low) when the ST input
does not have a transition (high-to-low or low-to-high) within the predetermined time period. The time-
out period is determined by the condition of the TD WD pin (see Table 1). If TD WD is connected to ground
the minimum watchdog time-out would be 10ms, TD floating would yield a minimum time-out of 100ms,
and TD WD connected to V CC would provide a time-out of 1000ms minimum. Time-out of the watchdog
starts when at least one of the RST outputs becomes inactive (high). If a transition occurs on the ST input
pin prior to time-out, the watchdog timer is reset and begins to time-out again. If the watchdog timer is
allowed to time-out, then the WDS output is pulsed active for a minimum of 100μs.
The WDS output is an open-drain output and must be pulled up externally. In most applications this
output would be connected to one of the Pushbutton inputs and would not require an external pull-up
resistor. The value of the resistors is not critical in most cases but must be set low enough to pull the
output to a high state. A common value used is 10k W . If a WDS output is connected to a pushbutton input
an additional pull-up resistor can be used (to improve speed of transitions) but is not required.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1831B | 功能描述:监控电路 3.3/5V Multisupply MicroMonitor 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 |
| DS1831B+ | 功能描述:监控电路 3.3/5V Multisupply MicroMonitor 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 |
| DS1831BS | 功能描述:监控电路 3.3/5V Multisupply MicroMonitor 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 |
| DS1831BS/T&R | 制造商:Maxim Integrated Products 功能描述:MULTISUPPLY MONITOR W/STAT 16-SO TR - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MULTIMN 5/3.3V WDOG PB 16SOIC |
| DS1831BS/T&R | 功能描述:监控电路 3.3/5V Multisupply MicroMonitor 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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