UC3903M 四路电源和线路监视器
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
|
UC3903M |
| # of supplies monitored |
4 |
| Iq (Typ) (uA) |
7000 |
| Output Driver Type / Reset Output |
Active-low,Open-drain |
| Reset Threshold Accuracy (%) |
5 |
| Time Delay (ms) |
Programmable |
| VCC (Min) (V) |
8 |
| VCC (Max) (V) |
40 |
| Threshold Voltage 1 (typ) (Typ) (V) |
1.8 |
| Threshold Voltage 2 (typ) (Typ) (V) |
Adjustable |
| Threshold Voltage 3 (typ) (Typ) (V) |
Adjustable |
| Threshold Voltage 4 (typ) (Typ) (V) |
Adjustable |
| Monitored Voltage 1 (typ) (Nom) (V) |
Adjustable |
| Monitored Voltage 2 (typ) (Nom) (V) |
Adjustable |
| Monitored Voltage 3 (typ) (Nom) (V) |
Adjustable |
| Monitored Voltage 4 (typ) (Nom) (V) |
Adjustable |
| Pin/Package |
18CDIP |
| Rating |
Military |
UC3903M 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
UC3903M 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 |
| UC3903J |
ACTIVE |
0 to 70 |
12.89 | 100u |
CDIP (J) | 18 |
1 | TUBE |
|
UC3903M 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 |
| UC3903J |
TBD |
A42 |
N/A for Pkg Type |
UC3903J |
UC3903J |
UC3903M 工具与软件
UC3903M 应用技术支持与电子电路设计开发资源下载
- UC3903M数据资料 dataSheet 下载.PDF
- TI 德州仪器电源管理选型与价格参考 . xls
- 简化的 LDO PSRR 测量
- LDO Noise Demystified
