MAX16054AZTT资料

19-4128; Rev 0; 5/08On/Off Controller with Debounce and ±15kV ESD ProtectionGeneral DescriptionFeaturesThe MAX16054 is a pushbutton on/off controller with asingle switch debouncer and built-in latch. It accepts aoRobust Inputs Can Handle Power Supplies Up tonoisy input from a mechanical switch and produces a±25Vclean latched digital output after a factory-fixed qualifi-cation delay.

o±15kV ESD ProtectionThe MAX16054 eliminates contact bounce during switchoLatched Output

opening and closing. The state of the output changesonly when triggered by the falling edge of theoLow 7µA Supply Currentdebounced switch input; the output remains unchangedon the rising edge of the input. Robust switch inputsoOperates from 2.7V to 5.5V

handle ±25V levels and are ±15kV ESD protected foruse in harsh industrial environments. The MAX16054o-40°C to +125°C Temperature Rangefeatures a complementary output, OUT, which is theoThin SOT23 Package

inverted state of OUT. An asynchronous CLEAR inputallows an external signal to force the output flip-flop low.Ordering InformationUndervoltage-lockout circuitry ensures that OUT is in theoff state upon power-up. The MAX16054 requires noexternal components, and its low supply current makesPARTTEMP RANGEPIN-TOPPACKAGEMARKit ideal for use in portable equipment.

MAX16054AZT+T-40°C to +125°C6 Thin SOT23+AADUThe MAX16054 operates from a +2.7V to +5.5V singlesupply. The MAX16054 is offered in a 6-pin thin SOT23+Denotes a lead-free package.package and operates over the -40°C to +125°C auto-T = Tape and reel package. Devices are offered in 2.5k unitincrements.motive temperature range.

ApplicationsTypical Operating CircuitsPDAs

MP3/Video PlayersLDOPortable ElectronicsENSet-Top Boxes

Portable InstrumentationVCCWhite Goods

3VOUTμPPin ConfigurationMAX16054INOUTTOP VIEW+CLEARIN16VCCGNDGND2MAX160545OUTCLEAR34OUTON/OFF WITH LDOTHIN SOT23Typical Operating Circuits continued at end of data sheet.________________________________________________________________Maxim Integrated Products1

For pricing, delivery, and ordering information,please contact Maxim Directat 1-888-629-42,or visit Maxim’s website at www.maxim-ic.com.MAX16054元器件交易网www.cecb2b.com

On/Off Controller with Debounce and ±15kV ESD ProtectionMAX16054ABSOLUTE MAXIMUM RATINGS

VCCto GND..............................................................-0.3V to +6VIN to GND................................................................-30V to +30VCLEAR to GND.........................................................-0.3V to +6VOUT, OUTto GND......................................-0.3V to (VCC+ 0.3V)Short-Circuit Duration

OUT, OUTto GND ...................................................ContinuousNote 1:As per JEDEC 51 standard, multilayer board (PCB).

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.Continuous Power Dissipation (TA= +70°C)6-Pin Thin SOT23

(derate 9.1mW/°C at +70°C) (Note 1)............................727mWOperating Temperature Range.........................-40°C to +125°CMaximum Junction Temperature.....................................+150°CStorage Temperature Range.............................-60°C to +150°CLead Temperature (soldering, 10s).................................+300°C

ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= +5V, TA= +25°C.) (Note 2)PARAMETEROperating Voltage RangeSupply CurrentDebounce DurationSYMBOLVCCICCtDPVILIN ThresholdIN HysteresisIN Pullup ResistanceIN CurrentIN Voltage RangeUndervoltage-Lockout ThresholdOUT/OUT Output VoltageIINVINVUVLOVOLVOHVCLEAR_ILCLEAR ThresholdCLEAR Input CurrentCLEAR High to OUT LowPropagation DelayESD CHARACTERISTICSIEC 61000-4-2 AirDischargeESD ProtectionINIEC 61000-4-2 ContactDischargeHuman Body Model±15±8±15kVVCLEAR_IHICLEARtCORL = 10kΩ, CL = 100pFVCC = 5VVCC = 2.7V2.42.0-1+1200µAnsVCC fallingISINK = 1.6mAISOURCE = 0.4mAVCC - 1.00.7VVIN = +25VVIN = -25V-1.5-251.8+252.40.432VIHVCC = 5VVCC = 2.7V2.52.042063100+1.5mVkΩmAVVV(Note 3)VCC = 5V, IOUT = IOUT = 0,IN not connectedTA = +25°CTA = -40°C to +125°C205CONDITIONSMIN2.775050TYPMAX5.52080990.65VUNITSVµAmsNote 2:All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.Note 3:OUT is guaranteed to be low for 1.0V ≤VCC≤VUVLO.2

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On/Off Controller with Debounce and ±15kV ESD ProtectionTypical Operating Characteristics(TA = +25°C, unless otherwise noted.)

SUPPLY CURRENTOUTPUT LOGIC LEVELvs. TEMPERATURE

DEBOUNCE OF CLOSING SWITCH

vs. SUPPLY VOLTAGE

10MAX16054 toc0210630ccoott 9 445500610V

618XA5

1XMINAM))AVμCC = 5V10V/divV(VOH, ISOURCE = 0.4mA L(7 ETN-10VV4EE6L RRUOUTCIGC5 Y5V/divO3L LTP4P0VUPUT2S3VCC = 3VOUTUO25V/div10V

1

VCC = 5VVOL, ISINK = 1.6mA0

0-40-25-105203550658095110125

10ms/div

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TEMPERATURE (°C)

SUPPLY VOLTAGE (V)

DEBOUNCE DELAY PERIODVCC UNDERVOLTAGE LOCKOUT

vs. TEMPERATURE

vs. TEMPERATURE

60403.550ccoott58 4455006)61)XV3.01sA(X Am56MTM(U DOOK2.5I54CREVCC = 3VOPL 52EYG2.0ALAE50TDL OEC48V1.5RNEUOB46VCC = 5VDNU1.0E D44CCV420.5VCC RISING40

0

-40-25-105203550658095110125

-40-25-105203550658095110125

TEMPERATURE (°C)

TEMPERATURE (°C)

Pin DescriptionPINNAMEFUNCTION1INSwitch Toggle Input. IN features a -25V to +25V maximum input range and includes an internal 63kΩpullup resistor to VCC. Connect a pushbutton from IN to GND.2GNDGround3CLEARClear Input. Pull CLEAR high to force OUT low. Connect CLEAR to GND if unused.4OUTActive-Low CMOS Output5OUTActive-High CMOS Output6VCC+2.7V to +5.5V Supply Input. In noisy environments, bypass VCC to GND with a 0.1µF or greaterceramic capacitor._______________________________________________________________________________________3

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On/Off Controller with Debounce and ±15kV ESD ProtectionMAX16054Functional DiagramDVCCDVCCOSCRRPUQCLRQQOUTCOUNTERRTCLROUTINXNORESDPROTECTIONUNDERVOLTAGELOCKOUTCLEARMAX16054Detailed DescriptionTheory of OperationThe MAX16054 creates a push-on, push-off functionusing a momentary-contact normally open SPSTswitch. The high-to-low transition that occurs whenclosing the switch causes OUT to go high and OUTtogo low. The output state remains latched after theswitch is released/opened. Closing the switch againcauses OUT to go low and OUTto go high.

Debounce circuitry eliminates the extraneous levelchanges that result from interfacing with mechanicalswitches (switch bounce). Virtually all mechanicalswitches bounce upon opening and closing. Thebounce when a switch opens or closes is eliminated byrequiring that the sequentially clocked input remains inthe same state for a number of sampling periods. The

output does not change state from high-to-low or low-to-high until the input is stable for at least 50ms (typ).The Functional Diagramshows the functional blocksconsisting of an on-chip oscillator, counter, exclusive-NOR gate, a D flip-flop, and a T (toggle) flip-flop. Whenthe pushbutton input does not equal the internaldebounced button state (the Q output of the D flip-flop), the XNOR gate issues a counter reset. When theswitch input state is stable for the full qualification peri-od, the counter clocks the D flip-flop, changing theinternal pushbutton state. The Q output of the D flip-flopis connected to a toggle flip-flop that toggles when theinternal pushbutton state goes through a high-to-lowtransition. Figure 1 shows the typical opening and clos-ing switch debounce operation.

A rising pulse at CLEAR resets the T flip-flop and pullsOUT low and OUThigh.

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On/Off Controller with Debounce and ±15kV ESD ProtectionVCCUVLOtDPtDPtDPtDPtDPINOUTPUT OF DFLIP-FLOP(INVERTED IN AFTERDEBOUNCE)tCOOUTCLEARFigure 1. MAX16054 Timing DiagramUndervoltage LockoutVCCrises above normal levels. In some low-current sys-The undervoltage-lockout circuitry ensures that the out-tems, a zener diode on VCCmay be required.

puts are at the correct state on power-up. While Vless than the 2.1V (typ) undervoltage threshold andCCis±15kV ESD Protectiongreater than 1.0V, OUT remains low and transitions atESD-protection structures are incorporated on all pinsIN are ignored.

to protect against electrostatic discharges encounteredduring handling and assembly. The MAX16054 hasRobust Switch Inputextra protection against static electricity to protectThe switch input (IN) has overvoltage clamping diodes toagainst ESD of ±15kV at the switch input without dam-protect against damaging fault conditions. Switch inputage. The ESD structures withstand high ESD in allvoltages can safely swing ±25V to ground. Proprietarystates: normal operation, shutdown, and poweredESD-protection structures protect against high ESDdown. A design advantage of the MAX16054 is that itencountered in harsh industrial environments, membranecontinues working without latchup after an ESD event,keypads, and portable applications. They are designedwhich eliminates the need to power-cycle the device.to withstand ±15kV per the IEC 61000-4-2 Air-GapDischarge test and ±8kV per the IEC 61000-4-2 Contact-ESD protection can be tested in various ways; thisDischarge test.

product is characterized for protection to the followinglimits:

Since there is a 63kΩ(typ) pullup resistor connected toIN, driving the input to -25V draws approximately 0.5mA1)±15kV using the Human Body Model.

from the V2)±8kV using the Contact-Discharge method specifiedapproximately 0.32mA of current to flow back into theCCsupply. Driving the input to +25V causesin IEC 61000-4-2.

VCCsupply. If the total system VCCsupply current is3)±15kV using the IEC 61000-4-2 Air-Gap method.

less than the current flowing back into the VCCsupply,

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On/Off Controller with Debounce and ±15kV ESD ProtectionMAX16054Human Body ModelFigure 2a shows the Human Body Model, and Figure2b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a100pF capacitor charged to the ESD voltage of interest,which is then discharged into the test device through a1.5kΩresistor.

IEC 61000-4-2The IEC 61000-4-2 standard covers ESD testing andperformance of finished equipment; it does not specifi-cally refer to integrated circuits. The MAX16054 helps inthe design of equipment that meets IEC 61000-4-2, with-out the need for additional ESD-protection components.The major difference between tests done using theHuman Body Model and IEC 61000-4-2 is higher peakcurrent in IEC 61000-4-2, because series resistance is

RC 1MΩCHARGE-CURRENTLIMIT RESISTORHIGH-VOLTAGEDCSOURCERD 1500ΩDISCHARGERESISTANCEDEVICEUNDERTESTHIGH- VOLTAGEDCSOURCElower in the IEC 61000-4-2 model. Hence, the ESD with-stand voltage measured to IEC 61000-4-2 is generallylower than that measured using the Human Body Model.Figure 3a shows the IEC 61000-4-2 model, and Figure3b shows the current waveform for the IEC 61000-4-2ESD Contact-Discharge test.

The Air-Gap test involves approaching the device with acharged probe. The Contact-Discharge method connectsthe probe to the device before the probe is energized.

Machine ModelThe Machine Model for ESD tests all pins using a200pF storage capacitor and zero discharge resis-tance. Its objective is to emulate the stress caused bycontact that occurs with handling and assembly duringmanufacturing.

RC 50MΩ to 100MΩCHARGE-CURRENTLIMIT RESISTORRD 330ΩDISCHARGERESISTANCEDEVICEUNDERTESTCs100pFSTORAGECAPACITORCs150pFSTORAGECAPACITORFigure 2a. Human Body ESD Test ModelFigure 3a. IEC 61000-4-2 ESD Test ModelIIP 100%90%AMPERES36.8%10%00tRLTIMEIrPEAK-TO-PEAK RINGING(NOT DRAWN TO SCALE)100%90%tDLCURRENT WAVEFORMIPEAK10%tR = 0.7ns TO 1nst30ns60nsFigure 2b. Human Body Current WaveformFigure 3b. IEC 61000-4-2 ESD Generator Current Waveform6

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On/Off Controller with Debounce and ±15kV ESD ProtectionTypical Operating Circuits (continued)3.3VVCCCC3VOUTVμPOUTMAX16054MAX16054INOUTINOUTCLEARCLEARGNDGNDON/OFF WITH p-CHANNEL MOSFETPUSH EITHER BUTTON3.3V3.3VVCCVCCOUTOUTMAX16054MAX16054INOUTINOUTCLEARCLEARGNDGNDPUSH BOTH BUTTONSDIGITAL PUSHBUTTON WITH LED (DEFAULT = OFF)_______________________________________________________________________________________7

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On/Off Controller with Debounce and ±15kV ESD ProtectionMAX16054Typical Operating Circuits (continued)3.3V3.3VVCCOUTVCCOUTR, C SETS PULSE WIDTHRMAX16054INOUTINMAX16054OUTCLEARGNDGNDCLEARCDIGITAL PUSHBUTTON WITH LED (DEFAULT = ON)PUSHBUTTON ONE-SHOT3.3V3.3VVCCAOUTVCCBOUTMAX16054INOUTINCLEARGNDMAX16054OUTCLEARGND4-POSITION PUSHBUTTON SELECTOR SWITCHLED STATEBSTATE0STATE1STATE2STATE3A8_______________________________________________________________________________________

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On/Off Controller with Debounce and ±15kV ESD ProtectionChip InformationPackage InformationPROCESS: BiCMOS

For the latest package outline information, go towww.maxim-ic.com/packages.

PACKAGE TYPEPACKAGE CODEDOCUMENT NO.6 Thin SOT23Z6-121-0114Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________9©2008 Maxim Integrated Products

is a registered trademark of Maxim Integrated Products, Inc.

MAX16054