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參數(shù)資料
| 型號： | DS1831S |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Multisupply Micromonitor |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 0.150 INCH, SOIC-16 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 206K |
| 代理商： | DS1831S |
DS1831/A/B
7 of 14
OUTPUT VALID CONDITIONS
The DS1831 can maintain valid outputs as long as one input remains above 1.0V. Accurate voltage
monitoring additionally requires that either the 3.3V IN or 5V IN input be above 1.5V. If this condition is
not met and at least one of the supply inputs are at or above 1.0V all outputs are maintained in the active
condition. The DS1831 requires pull-up resistors on the outputs to maintain a valid output. The value of
the pull up resistor is not critical in most cases but must be set low enough to pull the output to a high
state. A common pull-up resistor value used is 10k (see Figure 7).
APPLICATION DIAGRAM—OPEN DRAIN OUTPUTS
Figure 7
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 comparator (DS1831A 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.
RST
5V
PBRST
3.3V
GND
TD
5V
IN
3.3v
IN
5V
RST
3.3V
TOL
3.3V
PBRST
5V
TOL
5V
DS1831
TD
3.3V
5V Supply
3.3V Supply
1
2
3
4
5
16
15
14
13
12
10 k
10 K
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1831S/T&R | 制造商:Maxim Integrated Products 功能描述:MULTISUPPLY MONITOR 16P SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MULTIMON 5V/3.3V 16-SOIC |
| DS1831S/T&R | 功能描述:監(jiān)控電路 3.3/5V Multisupply MicroMonitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1831S+ | 功能描述:監(jiān)控電路 3.3/5V Multisupply MicroMonitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1831S+T&R | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.63V/3.06V 100UA 16SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MULTIMON 5V/3.3V 16-SOIC |
| DS1831S+T&R | 功能描述:監(jiān)控電路 3.3/5V Multisupply MicroMonitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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