1

FEATURES

DESCRIPTION

APPLICATIONS

SENSE1

SENSE2

WDI

GND

V

DD

MR

RESET

RESET

DORDGNPACKAGE

(TOPVIEW)

5V

External

Reset

Source

V

DD

V

I/O

V

CORE

V

IN

V

IN

V

OUT

V

OUT

MR

RESET

RESET

WDI

WDO

GND

GND

GND

GND

SENSE1

SENSE2

TPS3305-18

TPS73233

TPS73618

3.3V

1.8V

DSP

TPS3305

SLVS198C – DECEMBER 1998 – REVISED MARCH 2008

www.ti.com

DUAL PROCESSOR SUPERVISORS

2

• Dual Supervisory Circuits for DSP- and

The TPS3305 family is a series of micropower supply

Processor-Based Systems

voltage supervisors designed for circuit initialization.

Its dual monitor topology is well-suited to use in DSP

• Power-On Reset Generator with Fixed Delay

and processor-based systems, which often require

Time of 200ms; no External Capacitor Needed

two supply voltages, core and I/O.

• Watchdog Timer Retriggers the RESET Output

RESET is asserted when the voltage at either

at SENSEn

• Temperature-Compensated Voltage Reference

When both SENSEn pins are again above their

• Maximum Supply Current of 40µA

respective threshold voltages, RESET is held low for

the factory-programmed delay time (200ms typ).

• Supply Voltage Range: 2.7V to 6V

RESET is also asserted if the watchdog input (WDI)

• Defined RESET Output From V

is not toggled for more than 1.6s typ.

• MSOP-8 and SO-8 Packages

The TPS3305-xx devices are available in either 8-pin

• Temperature Range: –40°C to +85°C

MSOP or SO packages, and are specified for

operation over a temperature range of –40

°C to

+85

°C.

• Processor Supply Monitoring

• Industrial Equipment

• Automotive Systems

• Portable/Battery-Powered Equipment

• Wireless Communication Systems

• Notebook/Desktop Computers

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 1998–2008, 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.