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TPS3813的基本参数
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:监控器和复位 IC
  • 功能描述:具有可编程窗口看门狗的电压监控器(复位 IC)
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TPS3813的产品详情:

The TPS3813xxx family of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

During power on, RESET is asserted when supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td = 25 ms typical, starts after VDD has risen above the threshold voltage (VIT). When the supply voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider.

For safety critical applications the TPS3813xxx family incorporates a so-called window-watchdog with programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting WDT to GND, VDD, or using an external capacitor. The lower limit and thus the window ratio is set by connecting WDR to GND or VDD. The supervised processor now needs to trigger the TPS3813xxx within this window not to assert a RESET.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 6-pin SOT-23 package.

The TPS3813xxx devices are characterized for operation over a temperature range of –40°C to 85°C.

TPS3813的优势和特性:
  • Window-watchdog with programmable delay and window ratio
  • 6-Pin SOT-23 package
  • Supply current of 9 μA (Typical)
  • Power-on reset generator with a fixed delay time of 25 ms
  • Precision supply voltage monitor (VIT): 2.5 V, 3 V, 3.3 V, and 5 V
  • Open-drain reset output
  • Temperature range: ?–40°C to 85°C
TPS3813的参数(英文):
  • Number of supplies monitored
  • 1
  • Threshold voltage 1 (Typ) (V)
  • 2.25, 2.64, 2.93, 4.55
  • Features
  • Watchdog timer
  • Reset threshold accuracy (%)
  • 2.4
  • Output driver type/reset output
  • Active-low, Open-drain
  • Time delay (ms)
  • 25
  • Rating
  • Catalog
  • Watchdog timer WDI (sec)
  • Programmable
  • Operating temperature range (C)
  • -40 to 85
TPS3813具体的完整产品型号参数及价格(美元):

TPS3813的完整型号有:TPS3813I50DBVR、TPS3813I50DBVT、TPS3813J25DBVR、TPS3813J25DBVT、TPS3813K33DBVR、TPS3813K33DBVT、TPS3813L30DBVR、TPS3813L30DBVT,以下是这些产品的关键参数及官网采购报价:

TPS3813I50DBVR,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:3000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813I50DBVR的批量USD价格:.799(1000+)

TPS3813I50DBVT,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813I50DBVT的批量USD价格:.959(1000+)

TPS3813J25DBVR,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:3000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813J25DBVR的批量USD价格:.799(1000+)

TPS3813J25DBVT,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813J25DBVT的批量USD价格:.959(1000+)

TPS3813K33DBVR,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:3000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813K33DBVR的批量USD价格:.799(1000+)

TPS3813K33DBVT,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813K33DBVT的批量USD价格:.959(1000+)

TPS3813L30DBVR,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:3000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813L30DBVR的批量USD价格:.799(1000+)

TPS3813L30DBVT,工作温度:-40 to 85,封装:SOT-23 (DBV)-6,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TPS3813L30DBVT的批量USD价格:.959(1000+)

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TPS3813的评估套件:

TPS3813Q1EVM — 具有窗口看门狗的 TPS3813-Q1 处理器监控电路评估模块

TPS3813-Q1 是一款带有看门狗功能的处理器监控电路,适用于使用 DSP、微控制器、微处理器的应用或安全关键型应用。该融合型窗口看门狗可实现可编程延迟和窗口比率,从而当在任意子例程中的程序应该挂起时可发布一个已定义复位。

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