The TPS3818xxx family of microprocessor supervisory circuitsmonitor system voltages from 0.4V to 5.0V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds.

The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for V_IT ≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the C_T pin, 300ms by connecting the C_T pin to V_DD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the C_T pin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (T_J).

• Power-On Reset Generator with Adjustable Delay Time: 1.25ms to 10s
• Very Low Quiescent Current: 2.4μA typ
• High Threshold Accuracy: 0.5% typ
• Fixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are Available
• Manual Reset (MR) Input
• Open-Drain RESET Output
• Temperature Range: -40°C to +125°C
• Small SOT23 and 2mm × 2mm QFN Packages
• APPLICATIONS
  • DSP or Microcontroller Applications
  • Notebook/Desktop Computers
  • PDAs/Hand-Held Products
  • Portable/Battery-Powered Products
  • FPGA/ASIC Applications

PowerPAD Is a trademark of Texas Instruments All other trademarks are the property of their respective owners

• Number of supplies monitored
• 1
• Threshold voltage 1 (Typ) (V)
• 2.33
• Features
• Manual reset capable
• Reset threshold accuracy (%)
• 2
• Output driver type/reset output
• Active-low, Open-drain
• Time delay (ms)
• Programmable
• Rating
• Catalog
• Watchdog timer WDI (sec)
• None
• Operating temperature range (C)
• -40 to 125

TPS3818G25的完整型号有：TPS3818G25DRVT，以下是这些产品的关键参数及官网采购报价：

TPS3818G25DRVT，工作温度：-40 to 125，封装：WSON (DRV)-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TPS3818G25DRVT的批量USD价格：1.288（1000+）

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