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| HT672A 13.56MHz RFID Transponder Features * Low low operating current (15mA @ VDD=2V) * Wide range operating voltage * Battery less RF transponder * Data transmission in read-only operation * Max. of 64-bits customer programmable data * 16-bits CRC error detection code * OTP data memory * 13.56MHz carrier frequency * Output data baud rate: 5kbps (Typ.) * PWM/ASK modulation * Built-in voltage limiter * 8-pin DIP package available for engineering evaluation - not for volume production Applications * Interactive toys * Security system * Access control * Anti-counterfeit for commercial product General Description The HT672A is an RF transponder IC with 13.56MHz RF carrier, which provides a low cost battery less transponder solution when combined with an external inductor. The inductor and internal capacitor form an LC tank which induce voltage from the radiated 13.56MHz carrier signal generated from the reader antenna. HT672A has a built-in low power RC oscillator which is activated if the induced carrier field strength is high enough to supply the operating current and the response signal (pre-programmed in the OTP memory) is serially transmitted out. The response data is transmitted using PWM/ASK modulation. Modulation of 13.56MHz is accomplished by damping the LC tank with a fixed baud rate. The transmission information is stored in a 96 bits one time programmable memory OTP, with a 16-bit CRC code (up to 64 bits reserved for customer). The effective detection range for a small sized antenna is 2cm~10cm which is dependent on antenna format & reader design. The larger the antenna loop used the longer the detection range. It is advisable to use larger antenna to attain a 15 cm detection range. Implementing Holteks advanced OTP and low power technology, HT672A offers a very cost effective solution for RF contact less detection system. A code area of 64-bits (max.) wide is provided so customers can program the device using the specified programmer supplied by Holtek. The pre-programmed ICs are also available upon customers request. Block Diagram HF2 S y s te m C lo c k G e n e ra to r V C C L im ite r and R F L im ite r VDD HF1 F re q u e n c y D r iv e r fS Y S /4 D a ta P r o c e s s in g PowerO N R eset Testa EPRO P ro g ra m C o n tr nd M m in g ol P W M /A S K M o d u la to r S h ift R e g is te r D a ta EPROM VSS VPA CLK Rev. 1.10 1 May 17, 2007 HT672A Pin Assignment HF 1 8 2 7 3 6 4 5 H T672A 8 D IP -A NC NC HFI VCC VPP CLK GND Pad Assignment VDD VPA HF2 1 6 5 Note: The 8-pin DIP package type is supplied only for engineering evaluation purposes and will not be available in production volumes. 2 (0 ,0 ) 3 VSS 4 CLK Chip size: 925 1040 (mm)2 * The IC substrate should be connected to VSS in the PCB layout artwork. HF1 Pad Coordinates Pad No. 1 2 3 X -256.65 -256.65 96.10 Y 357.34 -361.99 -378.15 Pad No. 4 5 6 X 228.70 219.80 88.89 Y Unit: mm -361.37 338.59 332.15 Pad Description Pad No. 1 2 3 4 5 6 Pad Name HF2 HF1 VSS CLK VPA VDD I/O I/O I/O 3/4 I I 3/4 Internal Connection CMOS CMOS 3/4 CMOS 3/4 3/4 Description Connect to an antenna coil for normal operation. Open for data programming. Connect to an antenna coil for normal operation. Data I/O for programming. Negative power supply, ground Open for normal operation. Clock input for programming. Open for normal operation. High voltage supplies input for programming. Open for normal operation, +5V supply input for programming. Absolute Maximum Ratings Supply Voltage (VDD) ...............................................6V Supply Voltage (VPA) ..........................................12.5V Input Voltage .............................VSS-0.3V to VDD+0.3V 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. Storage Temperature ...........................-50C to 125C Operating Temperature ..............................0C to 70C Rev. 1.10 2 May 17, 2007 HT672A Electrical Characteristics Symbol VDD Idd Rm VLCL BR Parameter Operating Voltage Operating Current 3V Modulation Resistance LC Input Limiter Voltage Output Data Baud Rate 5V 3/4 3V VDD vs VSS Test Conditions VDD 3/4 2V Conditions VDD pad voltage 3/4 Voltage limiter not started 3/4 3/4 Min. 2 3/4 3/4 3/4 3/4 2.5 Typ. 3 15 600 320 6.5 5 Max. 4 3/4 3/4 3/4 3/4 7.5 Unit V mA mA W V Kbps Functional Description Operation Concept The reader transmits a 13.56MHz carrier signal from its antenna, the LC tank on the transponder side converts the carrier energy to voltage form and supply to the transponder chip with an internal pump circuit. If the induced energy is high enough, the pumped voltage reaches the break-in voltage of the internal RC-oscillator, the transponder is actuated to transmit its internal data serially by means of damping the LC tank. The reader receives the transponders data by means of detecting the energy variation on its own antenna, and recognize the information with a microcontroller. T ra n s p o n d e r E n e rg y Reader R F osc & C o n tr o lle r The HT672A has a built-in internal Voltage Limiter to prevent excess power supply and RF levels induced by the LC tank from damaging the device or causing the device to function abnormally. A total of 96 bits of OTP memory space is provided, from which 64 bits wide are customer programmable, which can be programmed using the specified programmer supplied by Holtek. The pre-programmed ICs are also available upon customers request. HT672A D a ta Timing & Code Package * C u s to m e r P r o g r a m m a b le C o d e A r e a ( 6 4 b its M a x .) ( 8 b its ) A g e n t ID ( H o lte k d e fin e d ) ( 8 b its ) C u s to m e r ID ( A g e n t d e fin e d ) ( 8 b its ) ( 5 6 b its ) ( 1 6 b its ) CRC T ra n s p o n d e r H T672A D a ta O u t C a te g o ry ID P ro d u c t ID ( C u s to m e r d e fin e d ) ( C u s to m e r d e fin e d ) P r o d u c t D a ta ( 6 4 b its ) T o ta l E P R O M s p a c e ( 9 6 b its ) Rev. 1.10 3 May 17, 2007 HT672A Code Package A total of 96 bits information can be stored in the HT672A, from which 64 bits are customer programmable. Agent ID: This 8-bit wide code is not customer programmable and is supplied together with the data writer after registering to Holtek. The writer generates the code automatically. Customer ID: This area is for the Agent, for example used to store current number of customer. Category ID: Can be used to store the application field information code. Product ID: Storing the contents of the user ID number or data. Data CRC: A 16 bits of CRC code is generated automatically by the writer. Application Circuits Tag A tag consists of a PCB (or Mylar film) with printed coil, HT672A and a housing. The housing can be of various shapes. T a g H o u s in g PCB HF2 HF1 H T672A Note: The value of the antenna inductance is 11mH, however the optimum value will be changed slightly due to the variation of the internal resonance capacitor (10pF typically) during process. For more application information about the reader, refer to Holteks 13.56MHz RF ID reader data. 2-chip Solution H o lte k T r a n s p o n d e r S o lu tio n E n e rg y D a ta D ecode & S y s te m C o n tro l H o lte k R e a d e r S o lu tio n O th e r C o n tr o lle r HT672A ANT ANT R F osc & R e c e iv e r S p e c ia l P u rp o s e C o n tr o lle r D a ta H o lte k L o w C o s t M C U : H T 4 8 R 0 5 A -1 /H T 4 8 R 0 6 A -1 Rev. 1.10 4 May 17, 2007 HT672A 1-chip Solution (I) H o lte k T r a n s p o n d e r S o lu tio n E n e rg y R F osc & R e c e iv e r D a ta D ecode & S y s te m C o n tro l F u n c tio n C o n tro l H o lte k R e a d e r S o lu tio n HT672A ANT ANT D a ta H o lte k S ta n d a r d M C U : H T 4 8 X X X /H T 4 9 X X X 1-chip Solution (II) H o lte k T r a n s p o n d e r S o lu tio n E n e rg y R F osc & R e c e iv e r D a ta D ecode & S y s te m C o n tro l F u n c tio n C o n tro l D a ta , V o ic e orLCD D is p la y P r o c e s s in g H o lte k R e a d e r S o lu tio n HT672A ANT ANT D a ta H o lte k E m b e d d e d M C U : H T G 2 1 X X /H T 8 6 X X X Rev. 1.10 5 May 17, 2007 HT672A V 0~20pF 200pF 0 .1 m F 0 .9 5 m H 0 .1 m F F F DD FR H E8550 SW SPDT 120W FR FR 220mF/ 16V 2 .7 m H 2SC1815Y 100pF 2SA733 20pF 20pF 150pF 750W 0 .1 m F 51W 240W H E8050S F 1 3 .5 6 M H z 30kW V 220mF/ 16V 2 2 0 m F /1 6 V 150W CC 330W LED 330W LED 330W LED 330W LED H E8050S 82pF F 1 820kW 3 3 2 8 1 2 .2 k W 5 8 4 5 2 PA3 PA2 PA1 PA0 7 PB2 PA4 PA5 PA6 PA7 OSC2 18 17 16 15 14 1kW 51kW 1kW 10kW 100kW 10kW 1kW 0 .1 m F 4 H T82V732 6 10kW 4 560kW 75W 0 .0 1 m F 6 H T82V732 7 8 9 P B 1 /B Z P B 0 /B Z VSS P C 0 /IN T OSC1 VDD RES P C 1 /T M R H T 4 8 R 0 6 A -1 13 12 11 10 100mF 200pF 680W 200pF 10kW 0 .1 m F RFID Reader F :TX :RX :O SC :PW R 470pF Rev. 1.10 6 0 .1 m F May 17, 2007 HT672A Package Information 8-pin DIP (300mil) Outline Dimensions A B 1 8 5 4 H C D E F G a I Symbol A B C D E F G H I a Dimensions in mil Min. 355 240 125 125 16 50 3/4 295 335 0 Nom. 3/4 3/4 3/4 3/4 3/4 3/4 100 3/4 3/4 3/4 Max. 375 260 135 145 20 70 3/4 315 375 15 Rev. 1.10 7 May 17, 2007 HT672A Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 86-21-6485-5560 Fax: 86-21-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9533 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 Fax: 86-10-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 86-28-6653-6590 Fax: 86-28-6653-6591 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com Copyright O 2007 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. Holteks 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. Rev. 1.10 8 May 17, 2007 |
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