UCC3946 带看门狗定时器的微处理器监控器
UCC3946 描述
The UCCx946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signal RES with VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.
The UCCx946 is also resistant to glitches on the VDD line. Once RES has been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in Figure 1. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions
|
UCC2946 |
UCC3946 |
| No. of Supervisors |
1 |
1 |
| Reset Threshold Accuracy(%) |
2 |
2 |
| Time Delay(ms) |
Prog |
Prog |
| IDD(Typ)(uA) |
10 |
10 |
| Pin/Package |
8SOIC, 8TSSOP |
8PDIP, 8SOIC, 8TSSOP |
| Rating |
Catalog |
Catalog |
UCC3946 特性
- Fully Programmable Reset Threshold
- Fully Programmable Reset Period
- Fully Programmable Watchdog Period
- 2% Accurate Reset Threshold
- Input Voltage Down to 2 V
- Input 18-uA Maximum Input Current
- Reset Valid Down to 1 V
UCC3946 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 |
| UCC3946D |
ACTIVE |
-40 to 85 |
1.60 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
UCC3946 |
| UCC3946DG4 |
ACTIVE |
-40 to 85 |
1.60 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
UCC3946 |
| UCC3946DTR |
ACTIVE |
-40 to 85 |
1.35 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
UCC3946 |
| UCC3946DTRG4 |
ACTIVE |
-40 to 85 |
1.35 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
UCC3946 |
| UCC3946PW |
ACTIVE |
-40 to 85 |
1.65 | 1ku |
TSSOP (PW) | 8 |
150 | TUBE |
3946 |
| UCC3946PWG4 |
ACTIVE |
-40 to 85 |
1.65 | 1ku |
TSSOP (PW) | 8 |
150 | TUBE |
3946 |
| UCC3946PWTR |
ACTIVE |
-40 to 85 |
1.40 | 1ku |
TSSOP (PW) | 8 |
2000 | LARGE T&R |
3946 |
| UCC3946PWTRG4 |
ACTIVE |
-40 to 85 |
1.40 | 1ku |
TSSOP (PW) | 8 |
2000 | LARGE T&R |
3946 |
UCC3946 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 |
| UCC3946D |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946D |
UCC3946D |
| UCC3946DG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946DG4 |
UCC3946DG4 |
| UCC3946DTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946DTR |
UCC3946DTR |
| UCC3946DTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946DTRG4 |
UCC3946DTRG4 |
| UCC3946PW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946PW |
UCC3946PW |
| UCC3946PWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946PWG4 |
UCC3946PWG4 |
| UCC3946PWTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946PWTR |
UCC3946PWTR |
| UCC3946PWTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC3946PWTRG4 |
UCC3946PWTRG4 |
UCC3946 应用技术支持与电子电路设计开发资源下载
- UCC3946 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
UCC3946 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| UCC3946 评估模块 |
UCC3946EVM |
Texas Instruments |
开发电路板/EVM |