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FEATURES
Triple Supervisory Circuits for DSP and
Processor-Based Systems
Power-On Reset Generator With Fixed Delay
Time of 200ms, No External Capacitor Needed
Temperature-Compensated Voltage Reference
Maximum Supply Current of 40μA
Supply Voltage Range: 2V to 6V
Defined RESET Output From V
DD
≥
1.1V
MSOP-8 and SO-8 Packages
Temperature Range : – 40
°
C to 85
°
C
1
2
3
4
8
7
6
5
SENSE1
SENSE2
SENSE3
GND
V
DD
MR
RESET
RESET
D OR DGN PACKAGE
(TOP VIEW)
Typical Applications
Figure 1 lists some of the typical applications for the TPS3307 family, and a schematic diagram for a
processor-based system application. This application uses TI part numbers TPS3307-33 and MSP430C325.
SENSE 1
SENSE 2
RESET
TPS330733
SENSE 3
V
DD
GND
100nF
RESET
V
DD
GND
3.3V
5V
2.5V
470k
620k
Applications using DSPs,
Microcontrollers or Microprocessors
Industrial Equipment
Programmable Controls
Automotive Systems
Portable/Battery Powered Equipment
Intelligent Instruments
Wireless Communication Systems
Notebook/Desktop Computers
MSP430C325
DESCRIPTION
The TPS3307 family is a series of micropower supply voltage supervisors designed for circuit initialization
primarily in DSP and processor-based systems, which require more than one supply voltage.
TPS3307-18, TPS3307-25, TPS3307-33
SLVS199B–DECEMBER 1998–REVISED OCTOBER 2004
TRIPLE PROCESSOR SUPERVISORS
Figure 1. Applications Using the TPS3307 Family
The product spectrum of the TPS3307-xx is designed for monitoring three independent supply voltages:
3.3V/1.8V/adj, 3.3V/2.5V/adj or 3.3V/5V/adj. The adjustable SENSE input allows the monitoring of any supply
voltage >1.25V.
The various supply voltage supervisors are designed to monitor the nominal supply voltage as shown in the
following supply voltage monitoring table.
During power-on, RESET is asserted when the supply voltage V
DD
becomes higher than 1.1V. Thereafter, the
supply voltage supervisor monitors the SENSE
n
inputs and keeps RESET active as long as SENSE
n
remain
below the threshold voltage V
IT+
.
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.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 1998–2004, Texas Instruments Incorporated