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參數資料
| 型號： | DS1831A |
| 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 MANAGEMENT CKT, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 206K |
| 代理商： | DS1831A |
DS1831/A/B
9 of 14
NON-MASKABLE INTERRUPT CIRCUIT EXAMPLE
Figure 9
Example:
V
SENSE1
= 11.50V trip point
V
SENSE1
=
R2
R2
R1
X 1.25V
Therefore:
11.50V =
k
100
k
100
R1
X 1.25V
Resulting In: R1 = 820k
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 . 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.
R1
DS1831
GND
IN1
V
SENSE1
R2
IN2
R3
V
SENSE2
R4
V
CC
10 K
PBRST
5V
PBRST
3.3V
NMI1
NMI2
MPBRST
相關PDF資料 |
PDF描述 |
|---|---|
| DS1831AS | Multisupply Micromonitor |
| DS1831B | Multisupply Micromonitor |
| DS1831BS | Multisupply Micromonitor |
| DPAD1 | Dual Pico Amp Diodes |
| DPAD10 | Dual Pico Amp Diodes |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1831A+ | 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: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1831AS | 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: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1831AS/T&R | 制造商:Maxim Integrated Products 功能描述:MULTISUPPLY MONITOR W/WD 16P SO TR - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MULTIMON 5V/3.3V WDOG 16-SOIC |
| DS1831AS/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: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1831AS+ | 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: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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