Circuits. TPS3813I50-Q1 Datasheet

TPS3813I50-Q1 Datasheet PDF


Part

TPS3813I50-Q1

Description

Processor Supervisory Circuits

Manufacture

etcTI

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TPS3813I50-Q1 Datasheet
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TPS3813K33-Q1, TPS3813I50-Q1
SPRS288F – MAY 2008 – REVISED DECEMBER 2016
TPS3813-Q1 Processor Supervisory Circuits With Window-Watchdog
1 Features
1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM Classification Level 2
– Device CDM Classification Level C4B
• Window-Watchdog With Programmable Delay and
Window Ratio
• 6-Pin SOT-23 Package
• Supply Current of 9 μA (Typ)
• Power-On Reset Generator With a Fixed Delay
Time of 25 ms
• Precision Supply-Voltage Monitor:
2.5 V, 3 V, 3.3 V, 5 V
• Open-Drain Reset Output
2 Applications
• Applications Using DSPs, Microcontrollers, or
Microprocessors
• Safety-Critical Systems
• Automotive Systems
• Heating Systems
During power on, the RESET pin is asserted when
the supply voltage (VDD) becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors VDD and
keeps the RESET pin active as long as VDD remains
below the threshold voltage (VIT).
An internal timer delays the return of the output to the
inactive (high) state to ensure proper system reset.
The delay time, td = 25 ms typical, begins 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 TPS3813-Q1
family of devices incorporate a window-watchdog with
programmable delay and window ratio. The upper
limit of the watchdog time-out can be set by either
connecting the WDT pin to GND or VDD, or by using
an external capacitor. The lower limit, and thus the
window ratio, is set by connecting the WDR pin to
GND or VDD. The RESET pin will assert a reset to the
microcontroller if the watchdog is incorrectly serviced.
The product spectrum is designed for supply voltages
of 2.5 V, 3 V, 3.3 V, and 5 V. The devices are
available in a 6-pin SOT-23 package. The devices
are characterized for operation over a temperature
range of –40°C to 125°C.
3 Description
The TPS3813-Q1 supervisory circuits provide circuit
initialization and timing supervision, primarily for
DSPs and processor-based systems.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS3813K33-Q1
TPS3813I50-Q1
SOT-23 (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Operating Circuit
VDD
0.1 µF
R
0.1 µF
VDD
WDR
RESET
TPS3813xxx-Q1
WDT
WDI
CWP
GND
VDD
RESET
µC
I/O
GND
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.

TPS3813I50-Q1 Datasheet
TPS3813K33-Q1, TPS3813I50-Q1
SPRS288F – MAY 2008 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 4
6.6 Timing Requirements ................................................ 4
6.7 Switching Characteristics .......................................... 5
6.8 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 7
7.1 Overview ................................................................... 7
7.2 Functional Block Diagram ......................................... 7
7.3 Feature Description................................................... 8
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Application ................................................. 10
9 Power Supply Recommendations...................... 12
10 Layout................................................................... 12
10.1 Layout Guidelines ................................................. 12
10.2 Layout Example .................................................... 13
11 Device and Documentation Support ................. 13
11.1 Device Support...................................................... 13
11.2 Documentation Support ........................................ 14
11.3 Related Links ........................................................ 14
11.4 Receiving Notification of Documentation Updates 14
11.5 Community Resource............................................ 14
11.6 Trademarks ........................................................... 14
11.7 Electrostatic Discharge Caution ............................ 14
11.8 Glossary ................................................................ 14
12 Mechanical, Packaging, and Orderable
Information ........................................................... 14
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (October 2016) to Revision F
Page
• Changed the part numbers in the Electrical Characteristics table and deleted references to TPS3813-Q1J25 and
TPS3813-Q1L30..................................................................................................................................................................... 4
Changes from Revision D (June 2015) to Revision E
Page
• Added + 1 back to the twindow,typ equation in the Programming Window-Watchdog Using an External Capacitor section ... 11
• Added the Receiving Notification of Documentation Updates section ................................................................................ 14
Changes from Revision C (September 2013) to Revision D
Page
• Deleted the TPS38131J25-Q1 and TPS3813L30-Q1 devices from the data sheet............................................................... 1
• Added the ESD Ratings table, Feature Description section, Device Functional Modes section, Application and
Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section................................................................ 1
• Deleted the Dissipation Ratings table ................................................................................................................................... 4
• Changed the voltage on the VDD pin from 0.6 V to 1.1 V in the Timing Diagram figure ........................................................ 9
Changes from Revision B (May 2012) to Revision C
Page
• Deleted banner stating that TPS3813K33-Q1 is Not Recommended for New Designs ........................................................ 6
Changes from Revision A (November 2008) to Revision B
Page
• Changed value from 47 pF to 155 pF. ................................................................................................................................. 11
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Copyright © 2008–2016, Texas Instruments Incorporated
Product Folder Links: TPS3813K33-Q1 TPS3813I50-Q1


Features Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS3813K33-Q1, TPS3813I50-Q1 SPRS288F – MAY 2008 – REVISED DECE MBER 2016 TPS3813-Q1 Processor Supervis ory Circuits With Window-Watchdog 1 Fe atures •1 Qualified for Automotive Ap plications • AEC-Q100 Qualified With the Following Results: – Device Tempe rature Grade 1: –40°C to +125°C Amb ient Operating Temperature Range – De vice HBM Classification Level 2 – Dev ice CDM Classification Level C4B • Wi ndow-Watchdog With Programmable Delay a nd Window Ratio • 6-Pin SOT-23 Packag e • Supply Current of 9 μA (Typ) • Power-On Reset Generator With a Fixed Delay Time of 25 ms • Precision Suppl y-Voltage Monitor: 2.5 V, 3 V, 3.3 V, 5 V • Open-Drain Reset Output 2 Applic ations • Applications Using DSPs, Mic rocontrollers, or Microprocessors • S afety-Critical Systems • Automotive S ystems • Heating Systems During powe r on, the RESET pin is asserted when the supply voltage (VDD) becomes higher than 1.1 V. Thereafter, t.
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