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TPS3828-33-Q1 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce TPS3828-33-Q1
Description  Voltage Monitor With Watchdog Timer
Download  29 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS3828-33-Q1 Fiches technique(HTML) 1 Page - Texas Instruments

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background image
−40
1.001
1
0.999
0.998
−15
10
35
TA − Free-Air Temperature − C
°
0.997
0.996
0.995
60
85
V
DD
V
DD
RESET
RESET
MR
WDI
GND
GND
TPS3823-33
MSP430C325
100 nF
3.3 V
I/O
Product
Folder
Sample &
Buy
Technical
Documents
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Software
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Community
TPS3820, TPS3823, TPS3823A, TPS3824, TPS3825, TPS3828
SLVS165K – APRIL 1998 – REVISED NOVEMBER 2015
TPS382x Voltage Monitor With Watchdog Timer
1 Features
3 Description
The TPS382x family of supervisors provide circuit
1
Power-On Reset Generator With Fixed Delay
initialization and timing supervision, primarily for DSP
Time of 200 ms (TPS3823/4/5/8) or 25 ms
and processor-based systems. During power on,
(TPS3820)
RESET
asserts
when
the
supply
voltage
VDD
Manual Reset Input (TPS3820/3/5/8)
becomes greater than 1.1 V. Thereafter, the supply
voltage supervisor monitors VDD and keeps RESET
Reset Output Available in Active-Low
active low as long as VDD remains less than the
(TPS3820/3/4/5), Active-High (TPS3824/5), and
threshold voltage, VIT−. An internal timer delays the
Open Drain (TPS3828)
return of the output to the inactive state (high) to
Supply Voltage Supervision Range:
ensure proper system reset. The delay time, td, starts
2.5 V, 3 V, 3.3 V, 5 V
after VDD has risen above the threshold voltage (VIT−
Watchdog Timer (TPS3820/3/4/8)
+ VHYS). When the supply voltage drops below the
threshold voltage VIT−, the output becomes active
Supply Current of 15
μA (Typical)
(low) again. No external components are required. All
5-Pin SOT-23 Package
the devices of this family have a fixed-sense
Temperature Range:
−40°C to 85°C
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
2 Applications
(TPS3823/4/8).
DSPs, Microcontrollers, or Microprocessors
Industrial Equipment
Device Information(1)
Programmable Controls
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Automotive Systems
TPS382x
SOT-23 (5)
2.90 mm × 1.60 mm
Portable and Battery-Powered Equipment
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Intelligent Instruments
Wireless Communications Systems
Notebook and Desktop Computers
Typical Application Schematic
Normalized Input Threshold Voltage vs Free-Air
Temperature
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.


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