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參數(shù)資料
| 型號(hào)： | DS1836D |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | 3.3V MicroManager(3.3V微管理器) |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| 封裝： | 0.300 INCH, DIP-8 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大小： | 66K |
| 代理商： | DS1836D |
DS1836A/B/C/D
022698 3/9
Non–Maskable Interrupt
The DS1836 generates a non–maskable interrupt
(NMI) for early warning of a power failure. A precision
comparator monitors the voltage level at the IN pin rela-
tive to an on–chip reference generated by an internal
band gap. The IN pin is a high impedance input allowing
for a user–defined sense point. An external resistor
voltage divider network (Figure 3) is used to interface
with high voltage signals. This sense point may be
derived from a regulated supply or from a higher DC
voltage level closer to the main system power input.
Since the IN trip point V
TP
is 1.25 volts, the proper val-
ues for R1 and R2 can be determined by the equation as
shown in Figure 3. Proper operation of the DS1836
requires that the maximum voltage at the IN pin be lim-
ited to the active supply (V
CC
or V
BAT
). Therefore, the
maximum allowable voltage at the supply being moni-
tored (V
MAX
) can also be derived as shown in Figure 3.
A simple approach to solving the equation is to select a
value for R2 high enough to keep power consumption
low, and solve for R1. The flexibility of the IN input pin
allows for detection of power loss at the earliest point in
a power supply system, maximizing the amount of time
for system shut–down between NMI and RST (or RST).
A pull–up resistor is required for proper operation of the
NMI open–drain output. A 10K
resistor would be a typ-
ical value for the pull–up resistor.
TYPICAL APPLICATION
Figure 2
V
BAT
V
OUT
NMI
IN
DS1836A
10K
V
CC
RST
GND
SYSTEM POWER
PRIMARY VOLTAGE RESET
SYSTEM POWER WARNING
VOLTAGE SENSE POINT
SECONDARY SYSTEM POWER
PRIMARY SYSTEM POWER
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1836D05 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| DS1836D-10 | 功能描述:監(jiān)控電路 3.3/5V MicroManager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| DS1836D-10+ | 功能描述:監(jiān)控電路 3.3/5V MicroManager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| DS1836D-20 | 功能描述:監(jiān)控電路 3.3/5V MicroManager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| DS1836D-20+ | 功能描述:監(jiān)控電路 3.3/5V MicroManager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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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