HT12D

HT12D/HT12F 212 Series of Decoders Note that the HT12F device, although mentioned in this datasheet, has already been phased out and is presently no longer available. Features · Operating voltage: 2.4V~12V · Built-in oscillator needs only 5% resistor · Low power and high noise immunity CMOS · Valid transmission indicator technology · Easy interface with an RF or an infrared transmission · Low standby current medium · Capable of decoding 12 bits of information · Minimal external components · Binary address setting · Pair with Holtek¢s 212 series of encoders · Received codes are checked 3 times · 18-pin DIP, 20-pin SOP package · Address/Data number combination - HT12D: 8 address bits and 4 data bits - HT12F: 12 address bits only Applications · Burglar alarm system · Car alarm system · Smoke and fire alarm system · Security system · Garage door controllers · Cordless telephones · Car door controllers · Other remote control systems General Description The 212 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek¢s 212 series of encoders (refer to the encoder/decoder cross reference table). For proper operation, a pair of encoder/decoder with the same number of addresses and data format should be chosen. ously with their local addresses. If no error or unmatched codes are found, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission. The 212 series of decoders are capable of decoding informations that consist of N bits of address and 12-N bits of data. Of this series, the HT12D is arranged to provide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information. The decoders receive serial addresses and data from a programmed 212 series of encoders that are transmitted by a carrier using an RF or an IR transmission medium. They compare the serial input data three times continu- Selection Table Function Data Address No. No. Type HT12D 8 4 HT12F 12 0 Part No. VT Oscillator Trigger Package L Ö RC oscillator DIN active ²Hi² 20SOP ¾ Ö RC oscillator DIN active ²Hi² 18DIP, 20SOP Notes: Data type: L stands for latch type data output. VT can be used as a momentary data output. Rev. 1.40 1 August 30, 2022 HT12D/HT12F Block Diagram O S C 2 O S C 1 O s c illa to r D iv id e r B u ffe r D IN D a ta S h ift R e g is te r L a tc h C ir c u it C o m p a ra to r C o n tr o l L o g ic D a ta D a ta D e te c to r S y n c . D e te c to r C o m p a ra to r T r a n s m is s io n G a te C ir c u it B u ffe r A d d re s s V D D V T V S S Note: The address/data pins are available in various combinations (see the address/data table). Pin Assignment 1 2 -A d d re s s 0 -D a ta 8 -A d d re s s 4 -D a ta 1 2 -A d d re s s 0 -D a ta N C 1 2 0 N C N C 1 2 0 N C A 0 2 1 9 V D D A 0 1 1 8 V D D A 0 2 1 9 V D D A 1 3 1 8 V T A 1 2 1 7 V T A 1 3 1 8 V T A 2 4 1 7 O S C 1 A 2 3 1 6 O S C 1 A 2 4 1 7 O S C 1 A 3 5 1 6 O S C 2 A 3 4 1 5 O S C 2 A 3 5 1 6 O S C 2 A 4 6 1 5 D IN A 4 5 1 4 D IN A 4 6 1 5 D IN A 5 7 1 4 D 1 1 A 5 6 1 3 A 1 1 A 5 7 1 4 A 1 1 A 6 8 1 3 D 1 0 A 6 7 1 2 A 1 0 A 6 8 1 3 A 1 0 A 7 9 1 2 D 9 A 7 8 1 1 A 9 A 7 9 1 2 A 9 1 0 1 1 D 8 V S S 9 1 0 A 8 V S S 1 0 1 1 A 8 V S S H T 1 2 D 2 0 S O P -A H T 1 2 F 2 0 S O P -A H T 1 2 F 1 8 D IP -A Pin Description Pin Name I/O Internal Connection I NMOS Transmission Gate A0~A11 (HT12F) A0~A7 (HT12D) Description Input pins for address A0~A11 setting These pins can be externally set to VSS or left open. Input pins for address A0~A7 setting These pins can be externally set to VSS or left open. D8~D11 (HT12D) O CMOS OUT DIN I CMOS IN VT O CMOS OUT OSC1 I Oscillator Oscillator input pin OSC2 O Oscillator Oscillator output pin VSS ¾ ¾ Negative power supply, ground VDD ¾ ¾ Positive power supply Rev. 1.40 Output data pins, power-on state is low. Serial data input pin Valid transmission, active high 2 August 30, 2022 HT12D/HT12F Approximate internal connection circuits N M O S T r a n s m is s io n G a te C M O S O U T C M O S IN O s c illa to r E N O S C 1 O S C 2 Absolute Maximum Ratings Supply Voltage ..........................................-0.3V to 13V Storage Temperature ............................-50°C to 125°C Input Voltage ................................VSS-0.3 to VDD+0.3V Operating Temperature...........................-20°C to 75°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² 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. Electrical Characteristics Symbol Parameter VDD Operating Voltage ISTB Standby Current Ta=25°C Test Conditions VDD Conditions ¾ ¾ 5V Oscillator stops 12V IDD IO IVT Min. Typ. Max. Unit 2.4 5 12 V ¾ 0.1 1 mA ¾ 2 4 mA ¾ 200 400 mA Operating Current 5V No load, fOSC=150kHz Data Output Source Current (D8~D11) 5V VOH=4.5V -1 -1.6 ¾ mA Data Output Sink Current (D8~D11) 5V VOL=0.5V 1 1.6 ¾ mA VOH=4.5V -1 -1.6 ¾ mA VOL=0.5V 1 1.6 ¾ mA VT Output Source Current 5V VT Output Sink Current VIH ²H² Input Voltage 5V ¾ 3.5 ¾ 5 V VIL ²L² Input Voltage 5V ¾ 0 ¾ 1 V fOSC Oscillator Frequency 5V ROSC=51kW ¾ 150 ¾ kHz Rev. 1.40 3 August 30, 2022 HT12D/HT12F Functional Description Operation Flowchart The 212 series of decoders provides various combinations of addresses and data pins in different packages so as to pair with the 212 series of encoders. The oscillator is disabled in the standby state and activated when a logic ²high² signal applies to the DIN pin. That is to say, the DIN should be kept low if there is no signal input. The decoders receive data that are transmitted by an encoder and interpret the first N bits of code period as addresses and the last 12-N bits as data, where N is the address code number. A signal on the DIN pin activates the oscillator which in turn decodes the incoming address and data. The decoders will then check the received address three times continuously. If the received address codes all match the contents of the decoder¢s local address, the 12-N bits of data are decoded to activate the output pins and the VT pin is set high to indicate a valid transmission. This will last unless the address code is incorrect or no signal is received. P o w e r o n S ta n d b y m o d e N o D is a b le V T & ig n o r e th e r e s t o f th is w o r d C o d e in ? Y e s A d d r e s s b its m a tc h e d ? The output of the VT pin is high only when the transmission is valid. Otherwise it is always low. N o Y e s S to re d a ta Output Type 12 Of the 2 series of decoders, the HT12F has no data output pin but its VT pin can be used as a momentary data output. The HT12D, on the other hand, provides 4 latch type data pins whose data remain unchanged until new data are received. M a tc h p r e v io u s s to r e d d a ta ? N o Y e s N o 3 tim e s o f c h e c k in g c o m p le te d ? Part No. Data Pins Address Pins Output Type Operating Voltage HT12D 4 8 Latch 2.4V~12V Y e s HT12F 0 12 ¾ 2.4V~12V L a tc h d a ta to o u tp u t & a c tiv a te V T N o A d d re s s o r d a ta e rro r ? Y e s Decoder Timing E n c o d e r T r a n s m is s io n E n a b le < 1 w o rd E n c o d e r D O U T 4 w o rd s 2 1 4 T r a n s m itte d C o n tin u o u s ly c lo c k s 4 w o rd s 2 1 4 c lo c k s D e c o d e r V T c h e c k c h e c k L a tc h e d D a ta O u t Rev. 1.40 4 August 30, 2022 HT12D/HT12F Encoder/Decoder Cross Reference Table Package Decoders Part No. Data Pins Address Pins VT Pair Encoder Encoder Decoder DIP SOP DIP SOP HT12D 4 8 Ö HT12A HT12E ¾ 20 ¾ 20 HT12F 0 12 Ö HT12A HT12E 18 20 18 20 Address/Data Sequence The following table provides address/data sequence for various models of the 212 series of decoders. Address/Data Bits Part No. 0 1 2 3 4 5 6 7 8 9 10 11 HT12D A0 A1 A2 A3 A4 A5 A6 A7 D8 D9 D10 D11 HT12F A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 Oscillator Frequency Vs Supply Voltage fo s c (S c a le ) R o s c (W ) 4 .0 0 2 7 k W 3 .5 0 3 0 k W 3 3 k W 3 .0 0 3 6 k W 3 9 k W 4 3 k W 2 .5 0 4 7 k W 5 1 k W 5 6 k W 2 .0 0 6 2 k W 6 8 k W 7 5 k W 1 .5 0 8 2 k W 1 0 0 k W 1 2 0 k W (1 0 0 k H z )1 .0 0 1 5 0 k W 1 8 0 k W 2 2 0 k W 0 .5 0 0 .2 5 2 Note: 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 V D D (V D C ) The recommended oscillator frequency is fOSCD (decoder) @ 50 fOSCE (HT12E encoder) 1 @ fOSCE (HT12A encoder). 3 Rev. 1.40 5 August 30, 2022 HT12D/HT12F Application Circuits R e c e iv e r C ir c u it 1 2 3 4 5 6 7 8 9 A 0 V D D A 1 V T A 2 O S C 1 A 3 O S C 2 A 4 D IN A 5 D 1 1 A 6 D 1 0 A 7 D 9 V S S D 8 R e c e iv e r C ir c u it V 1 8 D D 1 2 1 7 3 1 6 1 5 R O S C 4 1 4 5 1 3 6 1 2 7 1 1 8 1 0 9 H T 1 2 D Rev. 1.40 V 1 8 A 0 V D D A 1 V T A 2 O S C 1 A 3 O S C 2 A 4 D IN A 5 A 1 1 A 6 A 1 0 1 2 A 7 A 9 1 1 V S S A 8 1 0 D D 1 7 1 6 1 5 R O S C 1 4 1 3 H T 1 2 F 6 August 30, 2022 HT12D/HT12F Package Information 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. Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page. · Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications) · Packing Meterials Information · Carton Information Rev. 1.40 7 August 30, 2022 HT12D/HT12F 18-pin DIP (300mil) Outline Dimensions A A B 1 8 1 0 1 9 B 1 8 1 0 1 9 H H C C D D E E I G I G F F Fig1. Full Lead Packages Fig2. 1/2 Lead Packages · see fig1 Symbol Min. Nom. Max. A 0.880 0.900 0.920 B 0.240 0.250 0.280 C 0.115 0.130 0.195 D 0.115 0.130 0.150 E 0.014 0.018 0.022 F 0.045 0.060 0.070 G ¾ 0.1 BSC ¾ H 0.300 0.310 0.325 I ¾ ¾ 0.430 Symbol Rev. 1.40 Dimensions in inch Dimensions in mm Min. Nom. Max. A 22.35 22.86 23.37 B 6.10 6.35 7.11 C 2.92 3.30 4.95 D 2.92 3.30 3.81 E 0.36 0.46 0.56 1.78 F 1.14 1.52 G ¾ 2.54 BSC ¾ H 7.62 7.87 8.26 I ¾ ¾ 10.92 8 August 30, 2022 HT12D/HT12F · see fig2 Symbol Dimensions in inch Min. Nom. Max. A B C D E F 0.845 0.275 0.120 0.110 0.014 0.045 0.865 0.285 0.135 0.130 0.018 0.050 0.885 0.295 0.150 0.150 0.022 0.060 G ¾ 0.300 0.1 BSC H 0.310 ¾ 0.325 I ¾ ¾ 0.430 Symbol Dimensions in mm Min. Nom. Max. A B C D E F 21.46 6.99 3.05 2.79 0.36 1.14 21.97 7.24 3.43 3.30 0.46 1.27 22.48 7.49 3.81 3.81 0.56 1.52 G ¾ 7.62 2.54 BSC H 7.87 ¾ 8.26 I ¾ ¾ 10.92 · see fig2 Symbol Nom. Max. A B C D E F 0.845 0.240 0.115 0.115 0.014 0.045 0.870 0.250 0.130 0.130 0.018 0.060 0.880 0.280 0.195 0.150 0.022 0.070 G ¾ 0.300 0.1 BSC H 0.310 ¾ 0.325 I ¾ ¾ 0.430 Symbol Rev. 1.40 Dimensions in inch Min. Dimensions in mm Min. Nom. Max. A B C D E F 21.46 6.10 2.92 2.92 0.36 1.14 22.10 6.35 3.30 3.30 0.46 1.52 22.35 7.11 4.95 3.81 0.56 1.78 G ¾ 7.62 2.54 BSC H 7.87 ¾ 8.26 I ¾ ¾ 10.92 9 August 30, 2022 HT12D/HT12F 20-pin SOP (300mil) Outline Dimensions 1 1 2 0 A B 1 1 0 C C ' G H D E Symbol Dimensions in inch Min. Nom. Max. A ¾ 0.406 BSC ¾ B ¾ 0.295 BSC ¾ C 0.012 ¾ 0.020 C¢ ¾ 0.504 BSC ¾ D ¾ ¾ 0.104 E ¾ 0.050 BSC ¾ F 0.004 ¾ 0.012 G 0.016 ¾ 0.050 H 0.008 ¾ 0.013 a 0° ¾ 8° Symbol Dimensions in mm Min. Nom. Max. ¾ 10.30 BSC ¾ B ¾ 7.50 BSC ¾ C 0.31 ¾ 0.51 C¢ ¾ 12.80 BSC ¾ D ¾ ¾ 2.65 E ¾ 1.27 BSC ¾ F 0.10 ¾ 0.30 G 0.40 ¾ 1.27 H 0.20 ¾ 0.33 a 0° ¾ 8° A Rev. 1.40 a F 10 August 30, 2022 HT12D/HT12F Copyright Ó 2022 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 siteat http://www.holtek.com. Rev. 1.40 11 August 30, 2022