TPS3813I50

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS3813J25, TPS3813L30, TPS3813K33, TPS3813I50 SLVS331H – DECEMBER 2000 – REVISED JULY 2016 TPS3813xxx Family Processor Supervisory Circuits With Window-Watchdog 1 Features 1 Window-Watchdog With Programmable Delay and Window Ratio 6-Pin SOT-23 Package Supply Current of 9 µA (Typical) Power-On Reset Generator With a Fixed Delay Time of 25 ms Precision Supply Voltage Monitor: 2.5 V, 3 V, 3.3 V, and 5 V Open-Drain Reset Output Temperature Range: –40°C to 85°C 2 Applications Applications Using DSPs, Microcontrollers, or Microprocessors Safety Critical Systems Automotive Systems Heating Systems Typical Operating Circuit VDD 0.1 µF R 0.1 µF VDD WDR RESET TPS3813 WDT WDI CWP GND VDD RESET µC I/O GND Copyright © 2016, Texas Instruments Incorporated 3 Description 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 1.1 V. 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 = 25 ms typical, starts after VDD has risen above the threshold voltage (VIT). When the supply voltage drops bel...