UC3903 四路电源和线路监视器
UC3903 描述
The UC1903 family of quad supply and line monitor integrated circuits will respondto under- and over-voltage conditions on up to four continuously monitored voltage levels. An internal op-amp inverter allows at least one of these levels to be negative. A separate line/switcher sense input is available to provide early warning of line or other power source failures.
The fault window adjustment circuit on these devices provides easy programming of under- and over-voltage thresholds. The thresholds, centered around a precision 2.5-V reference, have an input hysteresis that scales with the window width for precise, glitch-free operation. A reference output pin allows the sense input fault windows to be scaled independently using simple resistive dividers.
|
UC2903 |
UC3903 |
| No. of Supervisors |
4 |
4 |
| Vit1(Typ)(V) |
2.5 |
2.5 |
| Vit2(Typ)(V) |
Adj |
Adj |
| Vit3(Typ)(V) |
Adj |
Adj |
| Vit4(Typ)(V) |
Adj |
Adj |
| Reset Threshold Accuracy(%) |
3 |
5 |
| Time Delay(ms) |
Prog |
Prog |
| IDD(Typ)(uA) |
7000 |
7000 |
| Pin/Package |
18PDIP, 18SOIC, 20PLCC |
18PDIP, 20PLCC, 18SOIC |
| Rating |
Catalog |
Catalog |
UC3903 特性
- Inputs for Monitoring up to FourSeparate Supply Voltage Levels
- Internal Inverter for Sensing a Negative Supply Voltage
- Line/Switch Sense Input for Early Power Source Failure Warning
- Programmable Under- and Over-Voltage Fault Thresholds with Proportional Hysteresis
- A Precision 2.5-V Reference
- General Purpose Op-Amp for Auxiliary Use
- Three High Current, >3 0mA, Open-Collector Outputs Indicate Over-Voltage, Under-Voltage and Power OK Conditions
- 8-V to 40-V Supply Operation with 7-mA Stand-By Current
UC3903 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| UC3903DW |
ACTIVE |
-40 to 85 |
2.85 | 1ku |
SOIC (DW) | 18 |
40 | TUBE |
UC3903DW |
| UC3903DWG4 |
ACTIVE |
-40 to 85 |
2.85 | 1ku |
SOIC (DW) | 18 |
40 | TUBE |
UC3903DW |
| UC3903DWTR |
ACTIVE |
-40 to 85 |
2.55 | 1ku |
SOIC (DW) | 18 |
2000 | LARGE T&R |
UC3903DW |
| UC3903DWTRG4 |
ACTIVE |
-40 to 85 |
2.55 | 1ku |
SOIC (DW) | 18 |
2000 | LARGE T&R |
UC3903DW |
| UC3903N |
ACTIVE |
-40 to 85 |
3.05 | 1ku |
PDIP (N) | 18 |
20 | TUBE |
UC3903N |
| UC3903NG4 |
ACTIVE |
-40 to 85 |
3.05 | 1ku |
PDIP (N) | 18 |
20 | TUBE |
UC3903N |
| UC3903Q |
ACTIVE |
-40 to 85 |
3.05 | 1ku |
PLCC (FN) | 20 |
46 | TUBE |
UC3903Q |
| UC3903QG3 |
ACTIVE |
-40 to 85 |
3.05 | 1ku |
PLCC (FN) | 20 |
46 | TUBE |
UC3903Q |
UC3903 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| UC3903DW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3903DW |
UC3903DW |
| UC3903DWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3903DWG4 |
UC3903DWG4 |
| UC3903DWTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3903DWTR |
UC3903DWTR |
| UC3903DWTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UC3903DWTRG4 |
UC3903DWTRG4 |
| UC3903N |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
UC3903N |
UC3903N |
| UC3903NG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
UC3903NG4 |
UC3903NG4 |
| UC3903Q |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
UC3903Q |
UC3903Q |
| UC3903QG3 |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
UC3903QG3 |
UC3903QG3 |
UC3903 应用技术支持与电子电路设计开发资源下载
- UC3903 数据资料 dataSheet 下载.PDF
- TI 德州仪器监控电路（电压监控器）产品选型与价格 . xls
UC3903 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| UC3903 评估模块 |
UC3903EVM |
Texas Instruments |
开发电路板/EVM |