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TPS3813

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具有可编程窗口看门狗的电压监控器（复位 IC）

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TPS3813

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产品详情

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.25, 2.64, 2.93, 4.55 Features Undervoltage monitor only, Watchdog timer, Window watchdog Reset threshold accuracy (%) 2.4 Iq (typ) (mA) 0.009 Output driver type/reset output Active-low, Open-drain Time delay (ms) 25 Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 85
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.25, 2.64, 2.93, 4.55 Features Undervoltage monitor only, Watchdog timer, Window watchdog Reset threshold accuracy (%) 2.4 Iq (typ) (mA) 0.009 Output driver type/reset output Active-low, Open-drain Time delay (ms) 25 Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 85
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Window-watchdog with programmable delay and window ratio
  • 6-Pin SOT-23 package
  • Supply current of 9µA (typical)
  • Power-on reset generator with a fixed delay time of 25ms
  • Precision supply voltage monitor (VIT):2.5V, 3V, 3.3V, and 5V
  • Open-drain reset output
  • Temperature range:  –40°C to 85°C
  • Window-watchdog with programmable delay and window ratio
  • 6-Pin SOT-23 package
  • Supply current of 9µA (typical)
  • Power-on reset generator with a fixed delay time of 25ms
  • Precision supply voltage monitor (VIT):2.5V, 3V, 3.3V, and 5V
  • Open-drain reset output
  • Temperature range:  –40°C to 85°C

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 1.1V. 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 = 25ms 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 2.5V, 3V, 3.3V, and 5V. 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.

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 1.1V. 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 = 25ms 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 2.5V, 3V, 3.3V, and 5V. 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.
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类型 标题 下载最新的英语版本 日期
* 数据表 TPS3813xxx Family Processor Supervisory Circuits With Window-Watchdog 数据表 (Rev. J) PDF | HTML 2024年 8月 29日
应用手册 Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) 2020年 3月 17日
选择指南 Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) 2020年 2月 28日
EVM 用户指南 TPS3813XXXEVM for Processor Voltage Supervisor User's Guide 2016年 9月 30日
应用手册 Window Watchdog Calculator for TPS3813 Voltage Supervisors (Rev. A) 2016年 9月 13日
技术文章 Why monitoring voltages matters PDF | HTML 2015年 6月 17日
应用手册 Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 2011年 9月 19日
应用手册 All Window Watchdog Supervisors 2009年 9月 9日

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评估板

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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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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