The TPS38 is a 65 V input voltage detector with 1 µA I_DD, 1% accuracy, and with a fast 10 µs detection time. This device can be connected directly to 12 V / 24 V automotive battery system for continuous monitoring of over (OV) or under (UV) voltage conditions; with its internal resistor divider, it offers the smallest total solution size. Wide hysteresis voltage options are available to ignore cold crank, start-stop and various car battery voltage transients. Built-in hysteresis on the SENSE pins prevents false reset signals when monitoring a supply voltage rail.

The separate VDD and SENSE pins allow for the redundancy sought by high-reliability automotive systems and SENSE can monitor higher and lower voltages than VDD. Optional use of external resistors are supported by the high impedance input of the SENSE pins. CTSx and CTRx pins allow delay adjustability on the rising and falling edges of the RESET signals. Also, CTSx functions as a debouncer by ignoring voltage glitches on the monitored voltage rails; CTRx operates as a manual reset (MR) that can be used to force a system reset.

The TPS38 is available in a WSON or SOT-23 package. The central pad is non-conductive to increase the creepage between VDD and GND per guidelines in IEC60664. TPS38 operates over –40°C to +125°C T_A.

• Functional Safety-Capable
  • Documentation available to aid functional safety system design
• Wide supply voltage range: 2.7 V to 65 V
• SENSE and RESET pins are 65 V graded
• Low quiescent current: 1 μA (typical)
• Flexible and wide voltage threshold options Table 12-1
  • 2.7 V to 36 V (1.5% maximum accuracy)
  • 800 mV option (1% maximum accuracy)
• Built-in hysteresis (VHYS)
  • Percentage options: 2% to 13% (1% steps)
  • Fixed options: VTH < 8 V = 0.5 V, 1 V, 1.5 V, 2 V, 2.5 V
• Programmable reset time delay
  • 10 nF = 12.8 ms, 10 μF = 12.8 s
• Programmable sense time delay
  • 10 nF = 1.28 ms, 10 μF = 1.28 s
• Manual Reset (MR) feature
• Output reset latching feature
• Output topology:
  • Channel 1: Open-Drain or Push-Pull
  • Channel 2: Open-Drain

• Number of supplies monitored
• 1, 2
• Threshold voltage 1 (Typ) (V)
• 0.8
• Features
• Detection time delay, Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage monitor only, Wide input voltage
• Reset threshold accuracy (%)
• 1.5
• Output driver type/reset output
• Active-high, Active-low, Open-drain, Push-pull
• Time delay (ms)
• Programmable
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 125

TPS38的完整型号有：TPS38A752933DSKR、TPS38B752933DSKR，以下是这些产品的关键参数及官网采购报价：

TPS38A752933DSKR，工作温度：-40 to 125，封装：SON (DSK)-10，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TPS38A752933DSKR的批量USD价格：1.078（1000+）

TPS38B752933DSKR，工作温度：-40 to 125，封装：SON (DSK)-10，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TPS38B752933DSKR的批量USD价格：1.078（1000+）

TPS37AQ1EVM — 用于具有超低 IQ 和延时功能的 65V 窗口监控器的 TPS37 评估模块

TPS37 评估模块 (EVM) 是一个用于评估 TPS37 和 TPS38 系列产品的平台。这些产品可在维持低静态电流的同时提供高达 65V 的工作电压，并提供可调整电压阈值、可调节复位、感应延时时间和可配置手动复位。

TPS37AQ1EVM 支持所有器件输出拓扑，并包括可置于跳线上的分流器，适用于不同输出配置。要了解详细信息，请参阅数据表。

TPS38 and TPS38-Q1 PSpice Transient Model

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)