TPS3305- Datasheet, PDF (1/13 Pages) Texas Instruments – DUAL PROCESSOR SUPERVISORS

TPS3305-18, TPS3305-25, TPS3305-33
DUAL PROCESSOR SUPERVISORS
D Dual Supervisory Circuits for DSP and
Processor-Based Systems
D Power-On Reset Generator with Fixed
Delay Time of 200 ms, no External
Capacitor Needed
D Watchdog Timer Retriggers the RESET
Output at SENSEn ≥ V_IT+
D Temperature-Compensated Voltage
Reference
D Maximum Supply Current of 40 µA
D Supply Voltage Range . . . 2.7 V to 6 V
D Defined RESET Output from V_DD ≥ 1.1 V
D MSOP-8 and SO-8 Packages
D Temperature Range . . . – 40°C to 85°C
SLVS198 – DECEMBER 1998
D OR DGN PACKAGE
(TOP VIEW)
SENSE1 1
SENSE2 2
WDI 3
GND 4
8 V_DD
7 MR
6 RESET
5 RESET
typical applications
Figure 1 lists some of the typical applications for the TPS3305 family, and a schematic diagram for a DSP-based
system application. This application uses TI part numbers TPS3305–25, TPS7133, TPS71025, and
TMS320VC549.
5 V – 10 V
TPS7133
3.3 V
VI
VO
GND
External
Reset
Source
GND
VI _TPS71025 VO _{2.5 V}
VDD
SENSE 1
MR
SENSE 2
TPS3305–25
RESET
WDI
GND
DSP
DVDD
CVDD
TMS320VC549
RESET
XF
GND
• Applications using DSPs, Microcontrollers
or Microprocessors
• Industrial Equipment
• Programmable Controls
• Automotive Systems
• Portable/Battery Powered Equipment
• Intelligent Instruments
• Wireless Communication Systems
• Notebook/Desktop Computers
Figure 1. Applications Using the TPS3305 Family
description
The TPS3305 family is a series of micropower supply voltage supervisors designed for circuit initialization,
primarily in DSP and processor-based systems, which require two supply voltages.
The product spectrum of the TPS3305 is designed for monitoring two independent supply voltages of
3.3 V/1.8 V, 3.3 V/2.5 V or 3.3 V /5 V.
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 © 1998, Texas Instruments Incorporated
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