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TPS3801K33 Datasheet(PDF) 1 Page - Texas Instruments

Part # TPS3801K33
Description  ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS3801K33 Datasheet(HTML) 1 Page - Texas Instruments

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TPS3801J25, TPS3801L30, TPS3801K33, TPS3801I50
ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS
SLVS219 – AUGUST 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D 5-Pin SC-70 (SOT-323) Package
D Supply Current of 9 µA (Typ)
D Power-On Reset Generator With Fixed
Delay Time of 200 ms
D Precision Supply Voltage Monitor 2.5 V, 3 V,
3.3 V, 5 V
D Manual Reset Input
D Temperature Range ...–40°C to 85°C
description
The TPS3801 family of supervisory circuits provide circuit initialization and timing supervision, primarily for
DSPs and processor-based systems.
During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the
supervisory circuit monitors 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(typ) = 200 ms, 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.
The TPS3801 devices incorporate a manual reset input, MR. A low level at MR causes RESET to become
active.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available
in a 5-pin SC-70 (SOT-323) package which is only about half the size of a 5-pin SOT-23 package.
The TPS3801 devices are characterized for operation over a temperature range of –40
°C to 85°C.
typical applications
VDD = 3.3 V
100 nF
TPS3801K33
TMS320LC54x
GND
GND
MR
RESET
RESET
VDD
VDD
D Applications Using DSPs, Microcontrollers,
or Microprocessors
D Wireless Communication Systems
D Portable/Battery-Powered Equipment
D Programmable Controls
D Intelligent Instruments
D Industrial Equipment
D Notebook/Desktop Computers
D Automotive Systems
Copyright
© 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
3
2
4
5
TPS3801 . . . DCK PACKAGE
(TOP VIEW)
1
RESET
GND
MR
VDD
GND


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