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TPS3828 Dataheets PDF



Part Number TPS3828
Manufacturers Texas Instruments
Logo Texas Instruments
Description Voltage Monitor
Datasheet TPS3828 DatasheetTPS3828 Datasheet (PDF)

Product Folder Order Now Technical Documents Tools & Software Support & Community TPS3820, TPS3823, TPS3823A, TPS3824, TPS3825, TPS3828 SLVS165L – APRIL 1998 – REVISED JANUARY 2018 TPS382x Voltage Monitor With Watchdog Timer 1 Features •1 Power-On Reset Generator With Fixed Delay Time of 200 ms (TPS3823/4/5/8) or 25 ms (TPS3820) • Manual Reset Input (TPS3820/3/5/8) • Reset Output Available in Active-Low (TPS3820/3/4/5), Active-High (TPS3824/5), and Open Drain (TPS3828) • Supply Voltage Sup.

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Product Folder Order Now Technical Documents Tools & Software Support & Community TPS3820, TPS3823, TPS3823A, TPS3824, TPS3825, TPS3828 SLVS165L – APRIL 1998 – REVISED JANUARY 2018 TPS382x Voltage Monitor With Watchdog Timer 1 Features •1 Power-On Reset Generator With Fixed Delay Time of 200 ms (TPS3823/4/5/8) or 25 ms (TPS3820) • Manual Reset Input (TPS3820/3/5/8) • Reset Output Available in Active-Low (TPS3820/3/4/5), Active-High (TPS3824/5), and Open Drain (TPS3828) • Supply Voltage Supervision Range: 2.5 V, 3 V, 3.3 V, 5 V • Watchdog Timer (TPS3820/3/4/8) • Supply Current of 15 μA (Typical) • 5-Pin SOT-23 Package • Temperature Range: −40°C to 85°C 2 Applications • DSPs, Microcontrollers, or Microprocessors • Industrial Equipment • Programmable Controls • Automotive Systems • Portable and Battery-Powered Equipment • Intelligent Instruments • Wireless Communications Systems • Notebook and Desktop Computers 3 Description The TPS382x family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains less than 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, starts after VDD has risen above the threshold voltage (VIT− + VHYS). 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. The TPS382x family also offers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823/4/8). Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) TPS382x SOT-23 (5) 2.90 mm × 1.60 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Schematic 3.3 V Normalized Input Threshold Voltage vs Free-Air Temperature VDD RESET TPS3823-33 MR WDI GND 100 nF VDD RESET MSP430C325 I/O GND 1.001 1 0.999 0.998 0.997 Normalized Input Threshold Voltage −V IT(TA), VIT(25°C) 0.996 0.995 −40 −15 10 35 60 TA − Free-Air Temperature − °C 85 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TPS3820, TPS3823, TPS3823A, TPS3824, TPS3825, TPS3828 SLVS165L – APRIL 1998 – REVISED JANUARY 2018 www.ti.com Table of Contents 1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 4 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 5 7.1 Absolute Maximum Ratings ...................................... 5 7.2 ESD Ratings ............................................................ 5 7.3 Recommended Operating Conditions....................... 5 7.4 Thermal Information .................................................. 5 7.5 Electrical Characteristics........................................... 6 7.6 Timing Requirements ................................................ 7 7.7 Switching Characteristics .......................................... 7 7.8 Typical Characteristics .............................................. 8 8 Detailed Description ............................................ 10 8.1 Overview ................................................................. 10 8.2 Functional Block Diagram ....................................... 10 8.3 Feature Description................................................. 10 8.4 Device Functional Modes........................................ 11 9 Application and Implementation ........................ 12 9.1 Application Information............................................ 12 9.2 Typical Applications ................................................ 12 10 Power Supply Recommendations ..................... 15 11 Layout................................................................... 15 11.1 Layout Guidelines ................................................. 15 11.2 Layout Example .................................................... 15 12 Device and Documentation Support ................. 16 12.1 Device Support...................................................... 16 12.2 Documentation Support ........................................ 16 12.3 Related Links ............


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