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Part number: TPS3809K33DBVR
Category: Power Management => Supervisory Circuits
Description: ti TPS3809K33, 3-Pin Supply Voltage Supervisor
Company, manufacture: Texas Instruments, Inc.
FEATURES
•3-Pin SOT-23 Package
•Supply Current of 9 mA (Typical)
•Precision Supply Voltage Monitor 2.5 V, 3 V, 3.3 V, 5 V
•Pin-For-Pin Compatible With MAX 809
•Temperature Range: –40°C to +85°C
APPLICATIONS
•Applications Using DSPs, Microcontrollers, or Microprocessors
•Wireless Communication Systems
•Portable/Battery-Powered Equipment
•Programmable Controls
•Industrial Equipment
•Notebook/Desktop Computers
•Automotive Systems
Datasheet text preview:
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS SLVS228 AUGUST 1999
3-Pin SOT-23 Package Supply Current of 9 µA (Typical) Precision Supply Voltage Monitor 2.5 V, 3 V, 3.3 V, 5 V Power-On Reset Generator With Fixed Delay Time of 200 ms Pin-For-Pin Compatible With MAX 809 Temperature Range . . . 40°C to 85°C
TPS3809 . . . DBV PACKAGE (TOP VIEW) GND 1 3 RESET 2 VDD
description
The TPS3809 family of supervisory circuits provides 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 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 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of 40°C to 85°C.
typical applications
TPS76333 3.3 V 5V IN GND VDD TPS3809K33 RESET GND RESET GND OUT VDD TMS320LC54x
Applications Using DSPs, Microcontrollers, or Microprocessors Wireless Communication Systems Portable/Battery-Powered Equipment Programmable Controls Intelligent Instruments Industrial Equipment Notebook/Desktop Computers Automotive Systems
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.
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.
Copyright © 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50 3-PIN SUPPLY VOLTAGE SUPERVISORS
SLVS228 AUGUST 1999
AVAILABLE OPTIONS TA DEVICE NAME TPS3809J25DBVR TPS3809L30DBVR TPS3809K33DBVR TPS3809I50DBVR TPS3809J25DBVT TPS3809L30DBVT TPS3809K33DBVT TPS3809I50DBVT THRESHOLD VOLTAGE 2.25 V 2.64 V 2.93 V 4.55 V MARKING PCZI PDAI PDBI PDCI
The DBVR passive indicates tape and reel of 3000 parts. The DBVT passive indicates tape and reel of 250 parts. FUNCTION/TRUTH TABLE, TPS3809 VDD>VIT 0 1 RESET L H TPS380 ORDERING INFORMATION 9 J 25 DBV R Reel Package Nominal Supply Voltage Nominal Threshold Voltage Functionality Family
functional block diagram
TPS3809
R1 VDD R2 GND
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