The TPS3803 and TPS3805 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

The TPS3803G15 device has a fixed-sense threshold voltage V_IT set by an internal voltage divider, whereas the TPS3803-01 has an adjustable SENSE input that can be configured by two external resistors. In addition to the fixed sense threshold monitored at V_DD, the TPS3805 devices provide a second adjustable SENSE input. RESET is asserted in case any of the two voltages drops below V_IT.

During power on, RESET is asserted when supply voltage V_DD becomes higher than 0.8 V. Thereafter, the supervisory circuit monitors V_DD (and/or SENSE) and keeps RESET active as long as V_DD or SENSE remains below the threshold voltage V_IT. As soon as V_DD (SENSE) rises above the threshold voltage V_IT , RESET is deasserted again. The product spectrum is designed for 1.5 V, 3.3 V, and adjustable supply voltages. The devices are available in a 5-pin SC-70 package.

The TPS3803 and TPS3805 devices are characterized for operation over a temperature range of -40°C to +85°C.

• Single Voltage Detector (TPS3803): Adjustable/1.5 V
• Dual Voltage Detector (TPS3805): Adjustable/3.3 V
• High ±1.5% Threshold Voltage Accuracy
• Supply Current: 3 μA Typical at VDD = 3.3 V
• Push/Pull Reset Output (TPS3805) Open-Drain Reset Output (TPS3803)
• Temperature Range: -40°C to +85°C
• 5-Pin SC-70 Package
• APPLICATIONS
  • Applications Using DSPs, Microcontrollers, or Microprocessors
  • Wireless Communication Systems
  • Portable/Battery-Powered Equipment
  • Programmable Controls
  • Intelligent Instruments
  • Industrial Equipment
  • Notebook/Desktop Computers
  • Automotive Systems

All trademarks are the property of their respective owners.

• Number of supplies monitored
• 2
• Threshold voltage 1 (Typ) (V)
• 3.05
• Features
• Ease-of-use
• Reset threshold accuracy (%)
• 1.5
• Output driver type/reset output
• Active-low, Push-pull
• Time delay (ms)
• 0
• Rating
• Catalog
• Watchdog timer WDI (sec)
• None
• Operating temperature range (C)
• -40 to 85

TPS3805H33的完整型号有：TPS3805H33DCKR，以下是这些产品的关键参数及官网采购报价：

TPS3805H33DCKR，工作温度：-40 to 85，封装：SC70 (DCK)-5，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：NIPDAUAG，TI官网TPS3805H33DCKR的批量USD价格：.498（1000+）

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