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TPS3820-33DBVR Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS3820-33DBVR
Description  PROCESSOR SUPERVISORY CIRCUITS
Download  14 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS3820-33DBVR Fiches technique(HTML) 1 Page - Texas Instruments

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TPS3820xx, TPS3823xx, TPS3824xx, TPS3825xx, TPS3828xx
PROCESSOR SUPERVISORY CIRCUITS
SLVS165E – APRIL 1998 – REVISED DECEMBER 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
D Power-On Reset Generator With Fixed
Delay Time of 200 ms (TPS3823/4/5/8)
or 25 ms (TPS3820)
D Manual Reset Input (TPS3820/3/5/8)
D Reset Output Available in Active-Low
(TPS3820/3/4/5), Active-High (TPS3824) and
Open-Drain (TPS3828)
D Supply Voltage Supervision Range
2.5 V, 3 V, 3.3 V, 5 V
D Watchdog Timer (TPS3820/3/4/8)
D Supply Current of 15 µA (Typ)
D SOT23-5 Package
D Temperature Range ...–40°C to 85°C
applications
D Applications Using DSPs, Microcontrollers,
or Microprocessors
D Industrial Equipment
D Programmable Controls
D Automotive Systems
D Portable/Battery-Powered Equipment
D Intelligent Instruments
D Wireless Communications Systems
D Notebook/Desktop Computers
description
The TPS382x family of supervisors provides
circuit
initialization
and
timing
supervision,
primarily for DSP and processor-based systems.
During power-on, RESET is asserted when
supply voltage VDD becomes higher than 1.1 V.
Thereafter, the supply voltage supervisor moni-
tors 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, starts 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.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
 2002, Texas Instruments Incorporated
This document contains information on products in more than one phase
of development. The status of each device is indicated on the page(s)
specifying its electrical characteristics.
3
2
4
5
TPS3820, TPS3823, TPS3828 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
MR
VDD
WDI
3
2
4
5
TPS3825 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
RESET
VDD
MR
3
2
4
5
TPS3824 . . . DBV PACKAGE
(TOP VIEW)
1
RESET
GND
RESET
VDD
WDI
RESET
MR
WDI
100 nF
VDD
GND
TPS3823-33
VDD
RESET
I/O
GND
MSP430C325
3.3 V
typical application


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