The TPS3803-Q1 and TPS3805-Q1 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

The TPS3803G15-Q1 device has a fixed-sense threshold voltage V_IT set by an internal voltage divider, whereas the TPS3803-01-Q1 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-Q1 devices provide a second adjustable SENSE input. RESET is asserted in case either 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-Q1 and TPS3805-Q1 devices are characterized for operation over a temperature range of –40°C to 125°C.

• Qualified for Automotive Applications
• Single Voltage Detector (TPS3803): Adjustable and 1.5 V
• Dual Voltage Detector (TPS3805): Adjustable and 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 125°C
• 5-Pin SC-70 Package

• Number of supplies monitored
• 2
• Threshold voltage 1 (Typ) (V)
• 3
• Features
• Ease-of-use
• Reset threshold accuracy (%)
• 1.5
• Output driver type/reset output
• Active-low, Push-pull
• Time delay (ms)
• 0
• Rating
• Automotive
• Watchdog timer WDI (sec)
• None
• Operating temperature range (C)
• -40 to 125

TPS3805H33-Q1的完整型号有：2T05H33QDCKRG4Q、TPS3805H33QDCKRQ1，以下是这些产品的关键参数及官网采购报价：

2T05H33QDCKRG4Q，工作温度：-40 to 125，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2T05H33QDCKRG4Q的批量USD价格：.588（1000+）

TPS3805H33QDCKRQ1，工作温度：-40 to 125，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TPS3805H33QDCKRQ1的批量USD价格：.588（1000+）

TPS3803Q1EVM — TPS3803X-Q1 电压检测器评估模块

TPS380XQ1 EVM 包括 TPS3803-Q1 和 TPS3805-Q1 系列监控电路，主要为 DSP 和基于处理器的系统提供电路初始化和计时监测。该 EVM 采用 TPS3803-01-Q1、TPS3803G15-Q1 和 TPS3805H33-Q1 三个器件，从而轻松实现评估。TPS3803G15-Q1 具有一个固定感应阈值电压，而 TPS3803Q1 有一个由外部电阻分压器配置的可调感应输入。TPS3805-Q1 具有第二个感应输入以及一个固定阈值电压。

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