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参数资料
| 型号： | DS1231-35 |
| 英文描述： | Power Supply Supervisor |
| 中文描述： | 电源监控 |
| 文件页数： | 1/9页 |
| 文件大小： | 66K |
| 代理商： | DS1231-35 |
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.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1231-50 | Power Supply Supervisor |
| DS1231S-20 | Power Supply Supervisor |
| DS1231S-35 | Power Supply Supervisor |
| DS1231S-50 | Power Supply Supervisor |
| DS1241 | Peripheral IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1231-35/G | 功能描述:监控电路 Power Monitor 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 |
| DS1231-35+ | 功能描述:监控电路 Power Monitor 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 |
| DS1231-35N | 功能描述:监控电路 Power Monitor 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 |
| DS1231-35N+ | 功能描述:监控电路 Power Monitor 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 |
| DS123150 | 制造商:DALLAS 功能描述:New |
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