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參數(shù)資料
| 型號： | DS1231SN-20 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 0.300 INCH, SOIC-16 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 70K |
| 代理商： | DS1231SN-20 |
DS1231/S
DS1231/S
Power Monitor Chip
022698 1/9
FEATURES
Warns processor of an impending power failure
Provides time for an orderly shutdown
Prevents processor from destroying nonvolatile
memory during power transients
Automatically restarts processor after power is
restored
Suitable for linear or switching power supplies
Adjusts to hold time of the power supply
Supplies necessary signals for processor interface
Accurate 5% or 10% V
CC monitoring
Replaces power-up reset circuitry
No external capacitors required
Optional 16-pin SOIC surface mount package
PIN ASSIGNMENT
MODE
NC
GND
RST
NC
VCC
NC
NMI
NC
RST
NC
TOL
NC
IN
NC
DS1231S 16–Pin SOIC
(300 MIL)
See Mech. Drawings
Section
VCC
NMI
RST
IN
MODE
TOL
GND
DS1231 8–Pin DIP
(300 MIL)
See Mech. Drawings
Section
1
2
3
4
5
6
7
8
1
11
12
13
14
2
3
4
5
6
7
8
9
10
15
16
PIN DESCRIPTION
IN
– Input
MODE
– Selects input pin characteristics
TOL
– Selects 5% or 10% VCC detect
GND
– Ground
RST
– Reset (Active High)
RST
– Reset (Active Low, open drain)
NMI
– Non–Maskable Interrupt
VCC
– +5V Supply
NC
– No Connections
DESCRIPTION
The DS1231 Power Monitor Chip uses a precise tem-
perature-compensated reference circuit which provides
an orderly shutdown and an automatic restart of a pro-
cessor-based system. A signal warning of an impending
power failure is generated well before regulated DC
voltages go out of specification by monitoring high volt-
age inputs to the power supply regulators. If line isola-
tion is required a UL-approved opto-isolator can be di-
rectly interfaced to the DS1231. The time for processor
shutdown is directly proportional to the available
hold-up time of the power supply. Just before the
hold-up time is exhausted, the Power Monitor uncondi-
tionally halts the processor to prevent spurious cycles
by enabling Reset as VCC falls below a selectable 5 or
10 percent threshold. When power returns, the proces-
sor is held inactive until well after power conditions have
stabilized, safeguarding any nonvolatile memory in the
system from inadvertent data changes.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1231SN-35 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| DS1231SN-50 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| DS1232 | 功能描述:監(jiān)控電路 MicroMonitor Chip 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 |
| DS1232+ | 功能描述:監(jiān)控電路 MicroMonitor Chip 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 |
| DS1232G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
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