Rev. 1.00 1 May 07, 2012 Rev. 1.00 PB May 07, 2012

HT62104Infrared Remote Encoder

Feature• Operatingvoltage:2.0V~5.0V• Eightdatakeycontrol• Twocustomcodesforproductdifferentiation• Startoscillationafterkeypressforpowersaving• LEDoutputtoindicatetransmissionstatus• Direct38kHzoutputfrequencyinfraredLEDmodulation

• Signalgaptime:T=4×192×(1/455kHz)≈4×16×(1/38kHz)– Signalgaptime:4T

• Lowpowerconsumption• 16-PinDIP/NSOPpackage

Applications• Fanremotecontrols• Audioremotecontrols• Toyremotecontrols• Consumerproductsremotecontrols

General DescriptionTheHT62104devicesarehighperformanceinfraredremotecontrolencoderswhicharemanufacturedinsilicongateCMOStechnology.TheHT62104devicessupporteightdatakeyinputsandanLEDoutput toindicatethetransmissionstatus.Asignaltransmissionisautomaticallyactivatedwhenanykeydata inputlineschangestatusfromhightolow.

ThedevicegeneratesasignalwhichiscomposedofaStartcode,aCustomcodeandaDatacodeandsendsthesignaltoitsoutputpin.ThiscanbeprovidedtoanIR(38kHzcarrier)transmissionmedium.

Block Diagram

Encoder Output Driver

Timing Generator

Internal RC oscillator

Data Latch

VDD

VSS

DOUT

K3

K2

K1

K4

K5

LED

C1

C2

K7

K6

K8

VSS1VDD1

Rev. 1.00 2 May 07, 2012

HT62104

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Pin DescriptionPin Name Type Description

VDD/VDD1 — Logic circuit positive power supply.

VSS — Logic circuit negative power supply, ground.

VSS1 — IR-LED negative power supplyC1, C2 I Custom code inputs.K1~K8 I Remote control key inputs. Internally connected to pull-high resistors.DOUT O Serial data output. NMOS open-drain structure.LED O Transmission indicator. PMOS open-drain structure.

Approximate Internal ConnectionsC1,C2 K1 ~ K8

LED

VSS

VDD

VSS1

DOUT

VSS

VDD

RR

VDD

VSS

VDD

Rev. 1.00 3 May 07, 2012

HT62104

Absolute Maximum RatingsSupplyVoltage…………………VSS-0.3VtoVSS+6.5VInputVoltage……………………VSS-0.3VtoVDD+0.3VOutputVoltage…………………VSS-0.3VtoVDD+0.3V

StorageTemperature…………………-55°Cto150°COperatingTemperature………………-10°Cto70°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder“AbsoluteMaximumRatings”maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyondthoselistedin thespecificationisnot impliedandprolongedexposuretoextremeconditionsmayaffectdevicereliability.

Electrical CharacteristicsTa= 25°C

Symbol ParameterTest Condition

Min. Typ. Max. UnitVDD Condition

VDD Operating Voltage ― ― 2.0 ― 5.0 V

IDD Operating Current 3V No load, C1 and C2 pins floating ― 0.6 0.9 mA

ISTB Standby Current 3V No load, Input pins floating, Oscillator stops ― 0.1 1.0 μA

VIHInput High Voltage(C1~C2, K1~K8) 3V ― 2.1 ― ― V

VILInput Low Voltage(C1~C2, K1~K8) 3V ― ― ― 0.9 V

RPH1 Pull-high Resistor (C1~C2) 3V ― 25 50 75 kΩ

RPH2 Pull-high Resistor (K1~K8) 3V ― 500 900 1500 kΩ

IOH LED Pin Output Source Current 3V VOH= 2.7V -2 ― -5 mA

IOL DOUT Pin Output Sink Current 3V VOL= 0.6V 300 350 ― mA

tDW Single Data Bit Width 2.0V~ 3.6V

Ta=25°C, load=1kW for DOUNT pin

Typ. - 1.5% 1.688 Typ. +

1.5% ms

0°C < Ta=25°C < 50°C, load=1kW for DOUNT pin

Typ. - 2.3% 1.688 Typ. +

2.3% ms

Rev. 1.00 4 May 07, 2012

HT62104

Functional DescriptionTheHT62104Infraredremotecontrolencoderpro-videsameansforeasyremotecontrolsignalencod-ing.Asallfunctions, includingthesystemoscillator,areintegratedwithinthedevice,theadditionofexter-nalswitchesandanIRLEDisall thatisrequiredtoimplementafullInfraredremotecontrol transmitterfunction.

Thedevicewillgenerateanencodedsignalonitsout-putpin,DOUT,composedofaStartcode,aCustomcodeandaDatacode.Thesignal isautomaticallygeneratedontheDOUTpinwhenanydatainputpin,K1~K8,changesstatefromhightolow.Theinternalpull-high resistorskeep thesedata inputpins inanormallyhighcondition.Theoutputsignalon theDOUTpincanbeinterfacedtoanexternalIRLEDforwirelesssignaltransmission.

Signal GenerationThedevicewillencodeandtransmitaStartcode,aCustomcodeandaDatacodeuponreceiptofatriggersignal.Thetriggersignal isahighto lowtransitiononanyof thedata inputpins,K1~K8.Thepinsarenormallykeptatahighlevelbytheinternalpull-highresistors.

Key Input TriggerTheSignal transmissionis initiatedwhenanyof thekeydata inputpinschangesstate fromhigh to low.If thepulsewidthof the triggersignalderivedfromthekeyinputs,K1~K8,islessthanorequalto32ms,therewillnosignaloutputon theDOUTpin. If thepulsewidthofthetriggersignalisgreaterthan32msandlessthanorequalto4-framewidths,thenaframecode repeated4 times,dependinguponwhichkeyinput ispulledfromahighstate toa lowstate,willbegeneratedontheDOUTpin.Ifthetriggeredsignalpulsewidth isgreater than4-framewidthsand lessthanorequalto8-framewidths,thenaframecodewillbegeneratedandrepeated8timesontheDOUTpin.

K1 ~ K8

DOUT

32 ms

32 ms < active 4 Frame

4 Frame < active 8 Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Frame

Note:1.Thekeydata input lowsignalpulsewidthmustbegreater thana32msduration fora full signaltransmission,whichconsistsofaspecificrepeatedframecode,tooccur.Iftheinputlowsignalislessthanorequalto32ms,thennosignalwillbetransmitted.

2.“Frame”indicatesaspecificframecodewhichisdeterminedbythetriggeringkey.

Frame FormatTherearefourframesthattheencodergeneratesforeachavailablesendingtrigger.Theframecodecontainsthreefieldsincludinga3-bitStartcode(110),a2-bitCustomcode(C1,C2)anda7-bitDatacode.Eachkeydatainputcorrespondstoaspecifictransmissioncodeshowninthefollowingtable.

Frame Code Table

KeyStart Code (S) Custom Code (C) Data Code (D)

S2 S1 S0 C1 C2 D6 D5 D4 D3 D2 D1 D0K1 1 1 0 C1 C2 0 0 0 0 0 0 1K2 1 1 0 C1 C2 0 0 0 0 0 1 0K3 1 1 0 C1 C2 0 0 0 0 1 0 0K4 1 1 0 C1 C2 0 0 0 1 0 0 0K5 1 1 0 C1 C2 0 0 1 0 0 0 0K6 1 1 0 C1 C2 0 1 0 0 0 0 0K7 1 1 0 C1 C2 1 0 0 0 0 1 1K8 1 1 0 C1 C2 1 0 0 0 1 1 0

TheC1andC2pinsare internallyconnected topull-highresistorswhosestatusaredecidedbycustomers.ConnectingtoGNDrepresentsa“0”whileconnectingtoVDDorkeepinginafloatingstaterepresentsa“1”.

Rev. 1.00 5 May 07, 2012

HT62104

Frame Data Format On DOUT Pin• AoneFramedataformatisshownbelow.

S 2 S 1 S 0 C 1 C 2 D 6 D 5 D 4 D 3 D 2 D 1 D 0

Delay time ( 32 ms )

One frame ( 12 bits )

Start code Custom code Data code

Press key

DOUT

• ThetimedurationbetweenFrame(n)andFrame(n+1)iscalledtheSignalGapTime.TheGapTimeiscountedbasedonaunitperiod,denotedas“T”.

kHz4551

19244T1 ××=λ= ≈ kHz381

164 × ×

– FortheHT62104device,theSignalGapTimeis4T.

Delay time (32ms) Frame 1 4T Frame 2

Press key

Frame 3 4T Frame 44T

Release key

DOUT S C D S C D S C D S C D

Gap Time Gap Time Gap Time

Carrier Output WaveformThecarriersignal,witha frequencyof38kHz, issuperimposedonto theoutputdatasignalwhich isused togenerateanddata0anddata1waveforms.Thecarriersignalisshowninthefollowingdiagram.

26 .3µs

8.77 µs

38 KHz carrier

DOUT Pin Bit Code WaveformsAsbitscanbedesignatedaseither“0”or“1”,theymustbeencodedinacertainwayasshownbelow.

λ

Bit “0”

Bit “1”

tDW

38 kHz

3 λ

λ3 λ

Note:1.kHz455

11921 ×=λ ≈

kHz381

16 ×

2.Bit“1”consistsofa“high”pulsefor1λanda“38kHzcarrier”for3λ.

3.Bit“0”consistsofa“high”pulsefor3λanda“38kHzcarrier”for1λ.

Rev. 1.00 6 May 07, 2012

HT62104

Frame Code TransmissionFrame Code Transmission TimingWhenakeyinputtriggeroccurs, thecorrespondingframecodewillbeoutputontheDOUTpinandtheframecodewillberepeated4times.Adata“1”willalsoappearontheLEDpinaftertheinternalRCoscillatorstartstooscillate.

K 1

IRC

LED

DOUTFC 1 FC 1 FC 1 FC 1

K 1 K 1 K 1 K 1

fOSC= 455 KHz

< 1ms

32 ms

12 T Signal Gap Time

FC 1 : Key 1 Frame Code

Frame Code Transmission Timing

Sequential Key Input TransmissionWhenkeyinputtriggersoccurssequentially, thecorrespondingframecodeswillbeasequentialoutputontheDOUTpin.Thetransmissionwaveformisshowninthefollowingdiagram.

K1

K2

IRC

LED

DOUT

K1 K1 K1 K1 K2 K2 K2 K2

fOSC =455kHz

>32ms

K2 K2 K2 K2

32ms 32ms

FC1

FC1

FC1

FC1

FC2

FC2

FC2

FC2

FC2

FC2

FC2

FC2

FC1: Key 1 Frame Code FC2: Key 2 Frame Code

Sequential Key Input Transmission

Rev. 1.00 7 May 07, 2012

HT62104

Overlapped Key Input TransmissionWhentwokeyinputtriggerpulsesoverlap,thetimewherethesecondtriggerpulseoccurswilldeterminewhatframecodewillbeoutputontheDOUTpin.Ifthesecondtriggerpulseoccursduringthegaptime,thefollowingframecodewillbeoutputontheDOUTpinandwillbeacombinationof thetwotriggeredframecodes.Thefollowingdiagramshowsthetransmissionwaveform.

K1

K2

IRC

LED

DOUT

K1+K2 K1+K2 K1+K2K1 K1 K2 K2 K2

fOSC = 455 kHz

FC1

FC1

FC2

FC2

FC2

FC1 + FC2

FC1 + FC2

FC1 + FC2

Gap Time

FC 1: Key 1 Frame Code.FC 2: Key 2 Frame Code.

FC 1+FC 2: Combination of Key 1 and Key 2 Frame Codes .

Overlapping Key Inputs Occurring During the Gap Time

Ifthesecondavailabletriggerpulseoccursduringtheframecodetransmissionduration,thepresentframecodebeingtransmittedwillstillbeoutputontheDOUTpin.Herethecombinationofthetwotriggeredframecodeswillbeconsecutivelyoutput.Thefollowingdiagramindicatesthetransmissionwaveform.

K1

K2

IRC

LED

DOUT

K1+K2 K1+K2K1 K1 K2 K2

fOSC = 455 kHz

FC1

FC1

FC2

FC2

FC1 + FC2

FC1 + FC2

Gap Time

FC 1: Key 1 Frame Code.FC 2: Key 2 Frame Code.

FC 1+FC 2: Combination of Key 1 and Key 2 Frame Codes.

K1

FC1

K1+K2

FC1 + FC2

Overlapping Key Inputs Occurring During a Frame Code Transmission

Thesamemethodologycanbeappliedontherisingtransitionofanyavailabletriggerpulsestoseehowtheframecodechangeswhenoverlappingkeyinputsoccur.

Rev. 1.00 8 May 07, 2012

HT62104

Operation Flowchart

Power ON

Stand -By Mode

Data transmitted

yes

no

yesno

Any of the keydata input pinin low state

Any of the keydata input pinin low state

Rev. 1.00 9 May 07, 2012

HT62104

Application Circuit

VDD

DOUT

LED

VDD1

VSS1

K8

K7

K6VSS

K5

K4

K3

K2

K1

C1

C2

1

2

3

4

5

6

7

8 9

10

11

12

13

14

15

16

K1

K2

K3

K4

K5

C1

C2

K8

K7

K6

1W IR LE

D

IR333C

-A(Q

)

HT62104

R1

VSS

LED

VSS1

VSS2Single-point

connection for GND

Single-point connection for VDD

R2 10W

220mFC1

VDD

V DD1

0.1mFC2

3V

Figure 1 (See Note)

VDD

DOUT

LED

VDD1

VSS1

K8

K7

K6VSS

K5

K4

K3

K2

K1

C1

C2K1

K2

K3

K4

K5

K6

K7

K8

3V 330mF

LED

1

2

3

4

5

6

7

8 9

10

11

12

13

14

15

16C1

C2

1mF

1W

IR LED

HT62104

IR333C-A(Q)

Figure 2

Note:1.VDD1providespowerfor theIR_LED;VDDprovidespowerfor theIC logiccircuits.The twopowersupplies,theC1(220mF)positiveterminalandthepositiveterminalofthebatterymusthaveasingle-pointconnection.

2.Before theVDDpowersupply isconnected to theICVDDpin,acapacitorC2(0.1mF)must firstbeconnectedclosetotheIC.

3.VSS1isGNDfortheDOUTdriver;VSS2isGNDfortheLEDdriver;VSSisGNDfortheIClogiccircuits.ThethreeGNDs,thenegativeterminalofC1(220mF)andthenegativeterminalofthebatterymusthaveasingle-pointconnection.

4.IfhighcurrentdriveconditionsforIR_LEDresultininstabilityonVDD(noise),itisrecommendtoaddaresistorR2tostabiliseVDDandVDD1pins.

5.TheDOUTandKEYtracksshouldbekeptapartbyadistanceof30milormore.6.DuringPCBmanufacture, theDOUT,VDD,VSS,VSS1,andVSS2tracksshouldnotbymadeusingcarbontracks.

Rev. 1.00 10 May 07, 2012

HT62104

Package Information

16-pin DIP (300mil) Outline Dimensions

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Fig1. Full Lead Packages Fig2. 1/2 Lead Packages

MS-001d (see fig1)

SymbolDimensions in inch

Min. Nom. Max.A 0.780 ― 0.880B 0.240 ― 0.280C 0.115 ― 0.195D 0.115 ― 0.150E 0.014 ― 0.022F 0.045 ― 0.070G ― 0.100 ―H 0.300 ― 0.325I ― 0.430 ―

SymbolDimensions in mm

Min. Nom. Max.A 19.81 ― 22.35B 6.10 ― 7.11C 2.92 ― 4.95D 2.92 ― 3.81E 0.36 ― 0.56F 1.14 ― 1.78G ― 2.54 ―H 7.62 ― 8.26I ― 10.92 ―

MS-001d (see fig2)

SymbolDimensions in inch

Min. Nom. Max.A 0.735 ― 0.775B 0.240 ― 0.280C 0.115 ― 0.195D 0.115 ― 0.150E 0.014 ― 0.022F 0.045 ― 0.070G ― 0.100 ―H 0.300 ― 0.325I ― 0.430 ―

SymbolDimensions in mm

Min. Nom. Max.A 18.67 ― 19.69B 6.10 ― 7.11C 2.92 ― 4.95D 2.92 ― 3.81E 0.36 ― 0.56F 1.14 ― 1.78G ― 2.54 ―H 7.62 ― 8.26I ― 10.92 ―

Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the Package/Carton Information.

Rev. 1.00 11 May 07, 2012

HT62104

16-pin NSOP (150mil) Outline Dimensions

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MS-012

SymbolDimensions in inch

Min. Nom. Max.A 0.228 ― 0.244

B 0.150 ― 0.157

C 0.012 ― 0.020

C’ 0.386 ― 0.402

D ― ― 0.069

E ― 0.050 ―

F 0.004 ― 0.010

G 0.016 ― 0.050

H 0.007 ― 0.010

α 0° ― 8°

SymbolDimensions in mm

Min. Nom. Max.A 5.79 ― 6.20

B 3.81 ― 3.99

C 0.30 ― 0.51

C‘ 9.80 ― 10.21

D ― ― 1.75

E ― 1.27 ―

F 0.10 ― 0.25

G 0.41 ― 1.27

H 0.18 ― 0.25

α 0° ― 8°

Rev. 1.00 12 May 07, 2012

HT62104

Reel Dimensions

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16-pin NSOP (150mil)

Symbol Description Dimensions in mm

A Reel Outer Diameter 330.0±1.0

B Reel Inner Diameter 100.0±1.5

C Spindle Hole Diameter 13.0 +0.5/-0.2

D Key Slit Width 2.0±0.5

T1 Space Between Flange 16.8 +0.3/-0.2

T2 Reel Thickness 22.2±0.2

Rev. 1.00 13 May 07, 2012

HT62104

Carrier Tape Dimensions

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16-pin NSOP (150mil)

Symbol Description Dimensions in mm W Carrier Tape Width 16.0±0.3

P Cavity Pitch 8.0±0.1

E Perforation Position 1.75±0.10

F Cavity to Perforation (Width Direction) 7.5±0.1

D Perforation Diameter 1.55+0.15/-0.00

D1 Cavity Hole Diameter 1.50 +0.25/-0.00

P0 Perforation Pitch 4.0±0.1

P1 Cavity to Perforation (Length Direction) 2.0±0.1

A0 Cavity Length 6.5±0.1

B0 Cavity Width 10.3±0.1

K0 Cavity Depth 2.1±0.1

t Carrier Tape Thickness 0.30±0.05

C Cover Tape Width 13.3±0.1

Rev. 1.00 14 May 07, 2012

HT62104

Holtek Semiconductor Inc. (Headquarters)No.3, Creation Rd. II, Science Park, Hsinchu, TaiwanTel: 886-3-563-1999Fax: 886-3-563-1189http://www.holtek.com.tw

Holtek Semiconductor Inc. (Taipei Sales Office)4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, TaiwanTel: 886-2-2655-7070Fax: 886-2-2655-7373Fax: 886-2-2655-7383 (International sales hotline)

Holtek Semiconductor (China) Inc. (Dongguan Sales Office)Building No.10, Xinzhu Court, (No.1 Headquarters), 4 Cuizhu Road, Songshan Lake, Dongguan, China 523808Tel: 86-769-2626-1300Fax: 86-769-2626-1311, 86-769-2626-1322

Holtek Semiconductor (USA), Inc. (North America Sales Office)46729 Fremont Blvd., Fremont, CA 94538, USATel: 1-510-252-9880Fax: 1-510-252-9885http://www.holtek.com

Copyright© 2012 by HOLTEK SEMICONDUCTOR INC.The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek's products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.