low power voltage detector 70xxa-1 series · 2011-07-26 · transistor turns onto bypass the charge...

70XXA-170XXA-170XXA-170XXA-1 seriesseriesseriesseriesLowLowLowLow PowerPowerPowerPower VoltageVoltageVoltageVoltage DetectorDetectorDetectorDetector

Ver1.0 1 Mar 6,2011

FeaturesFeaturesFeaturesFeatures� Low power consumption

� Low temperature coefficient

� Built-in hysteresis characteristic

� High input voltage (up to 24V)

� Output voltage accuracy: tolerance±2%

� TO92, SOT89 and SOT23 package

ApplicationsApplicationsApplicationsApplications� Battery checkers

� Level selectors

� Power failure detectors

� Microcomputer reset

� Battery memory backup

� Non-volatile RAM signal storage protectorsGGGGeneraleneraleneraleneral DescriptionDescriptionDescriptionDescriptionThe 70XXA-1 series devices area set of three

terminal low power voltage detectors implemented

in CMOS technology. Each voltage detector in the

series detects a particular fixed voltage ranging

from 2.2V to 7.0V. The voltage detectors consist of

a high-precision and low power consumption

standard voltage source as well as a comparator,

hysteresis circuit, and an output driver. CMOS

technology ensures low power consumption.

Although designed primarily as fixed voltage

detectors, these devices can be used with external

components to detect user specified threshold

voltages.

SelectionSelectionSelectionSelection TableTableTableTablePart No. Detectable

VoltageHysteresisWidth

Tolerance Package Marking

7022A-1 2.2V 0.11V ±2%

TO92SOT89SOT23

70XXA-1(for TO92)70XXA-1(for SOT89)70XX (for SOT23-3)

7024 A-1 2.4V 0.12V ±2%7027 A-1 2.7V 0.135V ±2%7030 A-1 3.0V 0.15V ±2%7033 A-1 3.3V 0.165V ±2%7036 A-1 3.6V 0.18V ±2%7039 A-1 3.9V 0.195V ±2%7044 A-1 4.4V 0.22V ±2%7050 A-1 5.0V 0.25V ±2%7070 A-1 7.0V 0.35V ±2%

Note: For lead free devices, TO92 package will add a “#”mark at the end of the date code, whereas

SOT89 & SOT23 packages will add a “#” mark at the end of the marking.

OrderOrderOrderOrder InformationInformationInformationInformation70①②③④⑤

Designator Symbol Description1 ② Integer Output Voltage(2.2~7.0V)③ H Standard④ T Package:TO-92

P Package:SOT89M Package:SOT23

⑤ R RoHS / Pb FreeG Halogen Free

BlockBlockBlockBlock DiagramDiagramDiagramDiagram


Ver1.0 2 Mar 6,2011

OutputOutputOutputOutput TableTableTableTable &&&& CurveCurveCurveCurveVVVVDDDDDDDD VVVVDDDDDDDD>V>V>V>VDETDETDETDET(+)(+)(+)(+) VVVVDDDDDDDD≤VVVVDETDETDETDET(-)(-)(-)(-)VVVVOUTOUTOUTOUT Hi-ZHi-ZHi-ZHi-Z VVVVSSSSSSSS

PinPinPinPin AssignmentAssignmentAssignmentAssignment

AbsoluteAbsoluteAbsoluteAbsolute MaximumMaximumMaximumMaximum RatingsRatingsRatingsRatings


Ver1.0 3 Mar 6,2011

Supply Voltage ................................-0.3V to 24V

Operating Temperature .................-40℃ to 85℃

Storage Temperature ..................-50℃ to 125℃

Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum

Ratings” may cause substantial damage to the device. Functional operation of this device at other

conditions beyond those listed in the specification is not implied and prolonged exposure to extreme

conditions may affect device reliability.

ThermalThermalThermalThermal InformationInformationInformationInformationSymbolSymbolSymbolSymbol ParameterParameterParameterParameter PackagePackagePackagePackage Max.Max.Max.Max. UnitUnitUnitUnit

θJA

Thermal Resistance (Junction toAmbient) (Assume no ambient

airflow, no heat sink)

SOT23 500 ℃/WSOT89 200 ℃/WTO92 200 ℃/W

PD Power DissipationSOT23 0.20 WSOT89 0.50 WTO92 0.50 W

Note: PD is measured at Ta= 25℃

ElectricalElectricalElectricalElectrical CharacteristicsCharacteristicsCharacteristicsCharacteristics7777022022022022A-1 Ta=25Ta=25Ta=25Ta=25℃

Symbol ParameterTest Conditions

Min. Typ. Max. UnitVDD Conditions

VDET Detection Voltage - - 2.136 2.200 2.244 V

VHYS Hysteresis Width - -0.02

VDET

0.05

VDET

0.1

VDETV

IDD Operating Current 8V No Load - 2 3 μA

VDD Operating Voltage - - 1.5 - 18 V

IOL Output Sink Current 2V VOUT=0.2V 0.5 1 - mA

a

DET

TV∆∆ Temperature

Coefficient-

0℃<Ta<70℃- ±1.1 - mV/℃

7777024024024024A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




Ver1.0 4 Mar 6,2011


a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777027027027027A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777030030030030A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV



IOL Output Sink Current 2V VOUT=0.2V 1.2 2.5 - mA

a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777033033033033A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777036036036036A-1 Ta=25Ta=25Ta=25Ta=25℃





Ver1.0 5 Mar 6,2011


VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777039039039039A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777044A-1044A-1044A-1044A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV



IOL Output Sink Current 2V VOUT=0.2V 3 6 - mA

a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

7777050050050050 A-1A-1A-1A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃


Ver1.0 6 Mar 6,2011

7777070A-1070A-1070A-1070A-1 Ta=25Ta=25Ta=25Ta=25℃





VDET

0.05

VDET

0.1

VDETV




a

DET


Coefficient-

0℃<Ta<70℃- ±0.9 - mV/℃

TypicalTypicalTypicalTypical PerformancePerformancePerformancePerformance CharacteristicsCharacteristicsCharacteristicsCharacteristics

(1) Output Voltage vs Input voltage

(2) Supply Current vs. Input Voltage


Ver1.0 7 Mar 6,2011

(3) Detect, Release Voltage vs. Ambient Temperature

ApplicationApplicationApplicationApplication CircuitsCircuitsCircuitsCircuits

MicrocomputerMicrocomputerMicrocomputerMicrocomputer ResetResetResetReset CircuitCircuitCircuitCircuit


Ver1.0 8 Mar 6,2011

Normally a reset circuit is required toprotect the microcomputer system frommalfunctions due to power line inter-rupttions. The following examplesshow how different output configure-tions perform a reset function invarious systems.NMOS open drain output applicationfor separate power supply

NMOS open drain output applicationwith R-C delay

Power-onPower-onPower-onPower-on ResetResetResetReset CircuitCircuitCircuitCircuitWith several external components, theNMOS open drain type of the 70XXA-1series can be used to perform apower-on reset function as shown:

5V5V5V5V PowerPowerPowerPower LineLineLineLine MonitoringMonitoringMonitoringMonitoring CircuitCircuitCircuitCircuitGenerally, a minimum operatingvoltage of 4.5V is guaranteed in a 5Vpower line system. The 7044A-1 isrecommended for use as 5V power linemonitoring circuit.5V power line monitor with power-onreset

With 5V voltage regulator

ChangeChangeChangeChange ofofofof DetectableDetectableDetectableDetectable VoltageVoltageVoltageVoltageIf the required voltage is not found inthe standard product selection table, itis possible to change it by usingexternal resistance dividers or diodes.Varying the detectable voltage with aresistance divider


Ver1.0 9 Mar 6,2011

Varying the detectable voltage with adiode

MalfunctionMalfunctionMalfunctionMalfunction AnalysisAnalysisAnalysisAnalysisThe following circuit demonstrates theway a circuit analyzes malfunctions by

monitoring the variation or spike noiseof power supply voltage.

Charge Monitoring CircuitThe following circuit shows a chargedmonitor for protection against batterydeterioration by overcharging. Whenthe voltage of the battery is higher thanthe set detectable voltage, thetransistor turns onto bypass the chargecurrent, protecting the battery fromovercharging.

LevelLevelLevelLevel SelectorSelectorSelectorSelectorThe following diagram illustrates a logic level selector.


Ver1.0 10 Mar 6,2011


Ver1.0 11 Mar 6,2011

PackagePackagePackagePackage InformationInformationInformationInformation3-pin3-pin3-pin3-pin TO92TO92TO92TO92 OutlineOutlineOutlineOutline DimensionsDimensionsDimensionsDimensions

3-pin3-pin3-pin3-pin SOT89SOT89SOT89SOT89 OutlineOutlineOutlineOutline DimensionsDimensionsDimensionsDimensions


Ver1.0 12 Mar 6,2011

3333-pin-pin-pin-pin SOT23SOT23SOT23SOT23 OutlineOutlineOutlineOutline DimensionsDimensionsDimensionsDimensions


Ver1.0 13 Mar 6,2011


Ver1.0 14 Mar 6,2011

ProductProductProductProduct TapeTapeTapeTape andandandand ReelReelReelReel SpecificationsSpecificationsSpecificationsSpecifications3-pin3-pin3-pin3-pin TO92TO92TO92TO92 ReelReelReelReel DimensionsDimensionsDimensionsDimensions (Unit:(Unit:(Unit:(Unit: mm)mm)mm)mm)

ReelReelReelReel DimensionsDimensionsDimensionsDimensions


Ver1.0 15 Mar 6,2011

CarrierCarrierCarrierCarrier TapeTapeTapeTape DimensionsDimensionsDimensionsDimensions


Ver1.0 16 Mar 6,2011

Note: Thickness less than 0.38_0.05mm~0.5mm

P0 Accumulated pitch tolerance: _1mm/20pitches.

( ) Bracketed figures are for consultation only

CarrierCarrierCarrierCarrier TapeTapeTapeTape DimensionsDimensionsDimensionsDimensions


Ver1.0 17 Mar 6,2011


Ver1.0 18 Mar 6,2011

low power voltage detector 70xxa-1 series · 2011-07-26 · transistor turns onto bypass the charge...

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