TPS3307-18, TPS3307-25, TPS3307-33
www.ti.com
SLVS199B–DECEMBER 1998–REVISED OCTOBER 2004
TRIPLE PROCESSOR SUPERVISORS
FEATURES
D OR DGN PACKAGE
(TOP VIEW)
•
Triple Supervisory Circuits for DSP and
Processor-Based Systems
SENSE1
SENSE2
SENSE3
GND
V
DD
1
2
3
4
8
7
6
5
•
Power-On Reset Generator With Fixed Delay
Time of 200ms, No External Capacitor Needed
MR
RESET
RESET
•
•
•
•
•
•
Temperature-Compensated Voltage Reference
Maximum Supply Current of 40µA
Supply Voltage Range: 2V to 6V
Defined RESET Output From VDD≥ 1.1V
MSOP-8 and SO-8 Packages
Temperature Range : – 40°C to 85°C
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.
2.5V
5V
3.3V
• Applications using DSPs,
Microcontrollers or Microprocessors
V
V
DD
DD
w Industrial Equipment
100nF
SENSE 1
MSP430C325
RESET
w Programmable Controls
w Automotive Systems
SENSE 2
RESET
470kΩ
TPS3307−33
w Portable/Battery Powered Equipment
w Intelligent Instruments
GND
SENSE 3
GND
w Wireless Communication Systems
w Notebook/Desktop Computers
620kΩ
Figure 1. Applications Using the TPS3307 Family
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.
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 VDD becomes higher than 1.1V. Thereafter, the
supply voltage supervisor monitors the SENSEn inputs and keeps RESET active as long as SENSEn remain
below the threshold voltage VIT+
.
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.
Copyright © 1998–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.