Monitor. TPS3823 Datasheet

TPS3823 Datasheet PDF


Part Number

TPS3823

Description

Voltage Monitor

Manufacture

etcTI

Total Page 29 Pages
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TPS3823 Datasheet
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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
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.

TPS3823 Datasheet
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 ........................................................ 17
12.4 Community Resources.......................................... 17
12.5 Trademarks ........................................................... 17
12.6 Electrostatic Discharge Caution ............................ 17
12.7 Glossary ................................................................ 17
13 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision K (November 2015) to Revision L
Page
• Changed the RESET columns for the TPS3824 and TPS3828 devices................................................................................ 4
• Removed 'Open-drain' from the RESET column for the TPS3828 device ............................................................................. 4
• Changed text in the MR pin description from: RESET to: RESET ........................................................................................ 4
Changes from Revision J (April 2013) to Revision K
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
• Changed front-page figure...................................................................................................................................................... 1
• Changed Pin Configuration and Functions section; updated table format ............................................................................. 4
• Changed "free-air temperature" to "junction temperature" in Absolute Maximum Ratings condition statement ................... 5
• Deleted Soldering temperature specification from Absolute Maximum Ratings table............................................................ 5
• Changed clamp current to current specifications in Absolute Maximum Ratings table ......................................................... 5
• Changed Removed VI from Absolute Maximum Ratings table .............................................................................................. 5
• Changed Removed VSENSE from Recommended Operating Conditions table........................................................................ 5
• Changed free-air temperature to junction temperature in Electrical Characteristics condition statement.............................. 6
• Changed "TA" to "TJ" in Timing Requirements condition statement ...................................................................................... 7
• Changed "TA" to "TJ" in Switching Characteristics condition statement ................................................................................ 7
• Added footnote (3) to Functional Block Diagram ................................................................................................................ 10
• Changed part number shown in Figure 9 ............................................................................................................................ 12
• Changed Figure 11 .............................................................................................................................................................. 14
2 Submit Documentation Feedback
Copyright © 1998–2018, Texas Instruments Incorporated
Product Folder Links: TPS3820 TPS3823 TPS3824 TPS3825 TPS3828


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TPS3820, TPS3823, TPS3823A, TPS 3824, TPS3825, TPS3828 SLVS165L – APR IL 1998 – REVISED JANUARY 2018 TPS382 x Voltage Monitor With Watchdog Timer 1 Features •1 Power-On Reset Generato r With Fixed Delay Time of 200 ms (TPS3 823/4/5/8) or 25 ms (TPS3820) • Manua l Reset Input (TPS3820/3/5/8) • Reset Output Available in Active-Low (TPS382 0/3/4/5), 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 • Temperatur e Range: −40°C to 85°C 2 Applicatio ns • DSPs, Microcontrollers, or Micro processors • Industrial Equipment • Programmable Controls • Automotive S ystems • Portable and Battery-Powered Equipment • Intelligent Instruments • Wireless Communications Systems • Notebook and Desktop Computers 3 Description The TPS382x family of supervisors provide circuit initial.
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