Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - system monitor Dual voltage detector MSOP 8

FEATURES DESCRIPTION

APPLICATIONS

SENSE1

SENSE2

WDI

GND

RESET

DORDGNPACKAGE

(TOPVIEW)

External

Reset

Source

I/O

CORE

OUT

RESET

WDI

WDO

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

• 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 ≥ V

IT+

SENSEn pin falls below its threshold voltage, V

• Temperature-Compensated Voltage Reference

When both SENSEn pins are again above their

• Maximum Supply Current of 40 µ A

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

≥ 1.1V

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

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.

2 All trademarks are the property of their respective owners.

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.

Summary of content (18 pages)

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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 DUAL PROCESSOR SUPERVISORS FEATURES DESCRIPTION 1 • Dual Supervisory Circuits for DSP- and Processor-Based Systems • Power-On Reset Generator with Fixed Delay Time of 200ms; no External Capacitor Needed • Watchdog Timer Retriggers the RESET Output at SENSEn ≥ VIT+ • Temperature-Compensated Voltage Reference • Maximum Supply Current of 40µA • Supply Voltage Range: 2.7V to 6V • Defined RESET Output From VDD ≥ 1.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 ELECTRICAL CHARACTERISTICS Over operating junction temperature range (unless otherwise noted). TPS3305-xx PARAMETER TEST CONDITIONS VDD Input supply range TJ Operating junction temperature range VOH High-level output voltage VOL Low-level output voltage Power-up reset voltage (1) VSENSE1, VSENSE2 VSENSE1, VSENSE2 Vhys Hysteresis at VSENSEn input V V VDD = 2.7V to 6V, IOL = 20µA 0.2 V VDD = 3.3V, IOL = 2mA 0.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 TIMING DIAGRAM SENSEn V(nom) VIT- t MR 1 t 0 tt(out) WDI 1 t 0 RESET 1 t 0 td td td td RESET because of SENSE below VIT- RESET because of WDI RESET because of MR RESET because of SENSE below VIT- RESET because of SENSE below VIT- TIMING REQUIREMENTS At VDD = 2.7V to 6V, RL = 1MΩ, CL = 50pF, and TJ = +25°C. PARAMETER TEST CONDITIONS SENSEn tw Pulse width MR WDI MIN VIH = 0.7 × VDD, VIL = 0.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 DEVICE INFORMATION FUNCTION/TRUTH TABLE (1) (1) MR SENSE1 > VIT1 SENSE2 > VIT2 RESET RESET L X X L H H 0 0 L H H 0 1 L H H 1 0 L H H 1 1 H L X = Don't care FUNCTIONAL BLOCK DIAGRAM VDD TPS3305 14kW MR R1 SENSE1 RESET R2 RESET Logic + Timer R3 SENSE2 RESET R4 GND Reference Voltage of 1.25V Transition Detection WDI Oscillator Watchdog Logic + Timer 40kW TERMINAL FUNCTIONS TERMINAL NAME NO.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 TYPICAL CHARACTERISTICS NORMALIZED SENSE THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE AT VDD SUPPLY CURRENT vs SUPPLY VOLTAGE 18 VDD = 6V 16 MR = Open 1.004 14 TPS3305-33 1.003 12 1.002 IDD - Supply Current - mA Normalized Input Threshold Voltage - VIT(TA), VIT(+25°C) 1.005 1.001 1 0.999 0.998 0.997 0.996 10 8 6 4 2 0 −2 −4 SENSEn = VDD −6 MR = Open TJ = +25°C −8 0.995 −40 −15 10 35 60 −10 −0.5 0 0.5 1 1.5 2 2.5 3 3.
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TPS3305 www.ti.com SLVS198C – DECEMBER 1998 – REVISED MARCH 2008 TYPICAL CHARACTERISTICS (continued) HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 2.5 6.5 VDD = 2V VDD = 6V 6 MR = Open MR = Open 2 VOH - High-Level Output Voltage - V VOH - High-Level Output Voltage - V 5.5 1.5 -40°C 1 +85°C 5 4.5 4 -40°C 3.5 3 +85°C 2.5 2 1.5 0.5 1 0.5 0 0 0 −0.5 −1 −1.5 −2 −2.5 −3 −3.5 −4 −4.5 −5 −5.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 24-Jan-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS3305-18DGNR Package Package Pins Type Drawing MSOPPower PAD SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TPS3305-18DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TPS3305-25DGNR MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS3305-18DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 35.0 TPS3305-18DR SOIC D 8 2500 367.0 367.0 35.0 TPS3305-25DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 35.0 TPS3305-25DR SOIC D 8 2500 367.0 367.0 35.0 TPS3305-33DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 35.0 TPS3305-33DR SOIC D 8 2500 367.
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