TPS3307- Datasheet, PDF (1/14 Pages) Texas Instruments – TRIPLE PROCESSOR SUPERVISORS

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TPS3307-18, TPS3307-25, TPS3307-33
SLVS199B – DECEMBER 1998 – REVISED OCTOBER 2004
TRIPLE PROCESSOR SUPERVISORS
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
D OR DGN PACKAGE
(TOP VIEW)
SENSE1 1
SENSE2 2
SENSE3 3
GND 4
8 V_DD
7 MR
6 RESET
5 RESET
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
470kΩ
620kΩ
V_DD
SENSE 1
SENSE 2 RESET
TPS3307−33
SENSE 3
GND
100nF
V_DD
MSP430C325
RESET
GND
• Applications using DSPs,
Microcontrollers or Microprocessors
w Industrial Equipment
w Programmable Controls
w Automotive Systems
w Portable/Battery Powered Equipment
w Intelligent Instruments
w Wireless Communication Systems
w Notebook/Desktop Computers
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 V_DD 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 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.
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