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参数资料
| 型号： | DS1831DS/T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | IC MULTIMON 3.3/2.5V WDOG 16SOIC |
| 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： | 2.5V，3.3V，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) |
DS1831C/D/E
APPLICATION DIAGRAM—OPEN DRAIN OUTPUTS Figure 7
2.5V Supply
3.3V Supply
10 K W
IN 2.5V
RST 2.5V
TOL 2.5V
TD 2.5V
PBRST 2.5V
1
2
3
4
5
16
15
DS1831C
14
13
12
IN 3.3v
RST 3.3V
TOL 3.3V
TD 3.3V
PBRST 3.3V
10 K W
GND
NOTE: If outputs are at different voltages the outputs can not be connected to form a wired AND.
OPERATION—NON-MASKABLE INTERRUPT
The DS1831 has two referenced comparators (DS1831D has only one referenced comparator) that can be
used to monitor upstream voltages or other system specific voltages. Each comparator is referenced to the
1.25V internal band gap reference and controls an open-drain output. When a voltage being monitored
decays to the voltage sense point, the DS1831 pulses the NMI output to the active state for a minimum
10μs. The comparator detection circuitry also has built-in hysteresis of 100μV. The supply must be below
the voltage sense point for approximately 2μs before a low NMI will be generated. In this way, power
supply noise is minimized in the monitoring function, reducing false interrupts. See Figure 8 for the non-
maskable timing diagram.
Versatile trip voltages can be configured by the use of an external resistor divider to divide the voltage at
a sense point to the 1.25V trip levels of the referenced comparators. See Figure 9 for an example circuit
diagram and sample equations. The equations demonstrate a design process to determine the resistor
values to use.
Connecting one or both NMI outputs to one of the reset specific PBRST s allows the non-maskable
interrupt to generate an automatic reset for the reset time period when an out-of-tolerance condition
occurs in a monitored supply. An example is shown in Figure 9.
The output associated with the specific input will be held low if the voltage on the input pin is less than
1.25V. If the voltage is above 1.25V the output will not sink current and will be pulled up by the required
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 an NMI output is connected to a pushbutton
input an additional pull-up resistor can be used (to improve speed of transitions) but is not required.
During a power-up, any detected IN pin levels above V TP by the comparator are disabled from generating
an inactive (high) interrupt until at least one supply on the V IN inputs rises above 1.5V. All NMI outputs
will be held active (low) until at least one V IN reaches 1.5V at which point the NMI outputs will be based
on the value of the associated IN input.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1831E | 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 |
| DS1831E+ | 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 |
| DS1831ES | 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 |
| DS1831ES/T&R | 制造商:Maxim Integrated Products 功能描述:3.3V/2.5V MULTISUPPLY MICROMONITOR - Tape and Reel |
| DS1831ES/T&R | 功能描述:监控电路 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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