HT672A 13.56MHz RFID Transponder Features · Low low operating current (15mA @ VDD=2V) · Wide range operating voltage · 13.56MHz carrier frequency · Battery less RF transponder · PWM/ASK modulation · Data transmission in read-only operation · Built-in voltage limiter · Max. of 64-bits customer programmable data · 8-pin DIP package available for engineering · Output data baud rate: 5kbps (Typ.) evaluation - not for volume production · 16-bits CRC error detection code · OTP data memory Applications · Interactive toys · Access control · Security system · Anti-counterfeit for commercial product General Description 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. 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. Implementing Holtek¢s 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 customer¢s request. Block Diagram H F 2 H F 1 P W M /A S K M o d u la to r S y s te m C lo c k G e n e ra to r V C C L im ite r a n d R F L im ite r 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 S h ift R e g is te r D a ta E P R O M V D D P o w e r O N R e s e t T e s t a E P R O P ro g ra m C o n tr V P A Rev. 1.10 1 n d M m in g o l V S S C L K May 17, 2007 HT672A Pad Assignment Pin Assignment V C C 7 V P P N C 3 6 C L K 5 G N D H F I 4 V P A 8 2 V D D 1 H F 2 H F N C 1 6 5 H T 6 7 2 A 8 D IP -A (0 ,0 ) Note: The 8-pin DIP package type is supplied only for engineering evaluation purposes and will not be available in production volumes. 2 3 4 H F 1 V S S C L K Chip size: 925 ´ 1040 (mm)2 * The IC substrate should be connected to VSS in the PCB layout artwork. Unit: mm Pad Coordinates Pad No. X Y Pad No. X Y 1 -256.65 357.34 4 228.70 2 -256.65 96.10 -361.99 5 219.80 -361.37 338.59 -378.15 6 88.89 332.15 3 Pad Description Pad No. Pad Name I/O Internal Connection Description 1 HF2 I/O CMOS Connect to an antenna coil for normal operation. Open for data programming. 2 HF1 I/O CMOS Connect to an antenna coil for normal operation. Data I/O for programming. 3 VSS ¾ ¾ 4 CLK I CMOS 5 VPA I ¾ Open for normal operation. High voltage supplies input for programming. 6 VDD ¾ ¾ Open for normal operation, +5V supply input for programming. Negative power supply, ground Open for normal operation. Clock input for programming. Absolute Maximum Ratings Supply Voltage (VDD) ...............................................6V Storage Temperature ...........................-50°C to 125°C Supply Voltage (VPA) ..........................................12.5V Operating Temperature ..............................0°C to 70°C Input Voltage .............................VSS-0.3V to VDD+0.3V 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. Rev. 1.10 2 May 17, 2007 HT672A Electrical Characteristics Symbol Parameter VDD Operating Voltage Idd Operating Current Test Conditions Conditions VDD ¾ VDD pad voltage Min. Typ. Max. Unit 2 3 4 V 2V ¾ ¾ 15 ¾ mA 3V Voltage limiter not started ¾ 600 ¾ mA Rm Modulation Resistance 5V ¾ ¾ 320 ¾ W VLCL LC Input Limiter Voltage ¾ ¾ ¾ 6.5 ¾ V BR Output Data Baud Rate 3V 2.5 5 7.5 Kbps VDD vs VSS Functional Description 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. 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 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 customer¢s request. by means of damping the LC tank. The reader receives the transponder¢s 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 R e a d e r R F o s c & C o n tr o lle r H T 6 7 2 A D a ta Timing & Code Package T ra n s p o n d e r H T 6 7 2 A D a ta O u t * 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 ) ( 8 b its ) ( 8 b its ) A g e n t ID ( H o lte k d e fin e d ) C u s to m e r ID ( A g e n t d e fin e d ) ( 5 6 b its ) 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 ) ( 1 6 b its ) C R C P r o d u c t D a ta ( 6 4 b its ) T o ta l E P R O M Rev. 1.10 3 s p a c e ( 9 6 b its ) May 17, 2007 HT672A Code Package Customer ID: This area is for the Agent, for example used to store current number of customer. A total of 96 bits information can be stored in the HT672A, from which 64 bits are customer programmable. Category ID: Can be used to store the application field information code. 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. 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 P C B H F 2 H F 1 Note: H T 6 7 2 A 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 Holtek¢s 13.56MHz RF ID reader data. 2-chip Solution H o lte k R e a d e r S o lu tio n H o lte k T r a n s p o n d e r S o lu tio n O th e r C o n tr o lle r E n e rg y H T 6 7 2 A A N T R F o s c & R e c e iv e r A N T D a ta D e c o d e & S y s te m C o n tro l 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 H o lte k R e a d e r S o lu tio n E n e rg y H T 6 7 2 A A N T R F o s c & R e c e iv e r A N T D a ta D e c o d e & S y s te m C o n tro l F u n c tio n C o n tro l 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 H o lte k R e a d e r S o lu tio n E n e rg y H T 6 7 2 A A N T R F o s c & R e c e iv e r A N T D a ta D e c o d e & 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 o r L C D D is p la y P r o c e s s in g 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 RFID Reader H E 8 0 5 0 S 1 0 0 p F 2 .7 m H 0 .9 5 m H 0 ~ 2 0 p F 2 0 0 p F F 0 .1 m F 5 1 W 2 0 0 p F F R 0 .1 m F 0 .1 m F F F 2 S A 7 3 3 2 4 0 W 2 0 0 p F 1 k W F H E 8 0 5 0 S 6 8 0 W 1 2 0 W 7 5 0 W 1 0 k W 1 0 k W 1 k W 2 0 p F 8 4 1 3 0 k W 5 6 0 k W H T 8 2 V 7 3 2 : T X 1 5 0 p F 2 0 p F 1 3 .5 6 M H z 3 2 0 .1 m F F : R X F R 1 5 0 W 2 .2 k W 1 0 k W 7 5 W 8 2 2 0 m F / 1 6 V 8 2 0 k W 5 6 4 0 .0 1 m F : O S C : P W R F R 2 2 0 m F /1 6 V 0 .1 m F 8 2 p F 7 H T 8 2 V 7 3 2 V C C P A 4 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 0 0 m F 1 k W H E 8 5 5 0 3 3 0 W P A 5 3 3 0 W P A 3 P A 6 3 3 0 W P A 2 3 3 0 W P A 1 P A 7 L E D P A 0 O S C 2 L E D P B 2 O S C 1 L E D P B 1 /B Z R E S V D D P C 1 /T M R P B 0 /B Z P C 0 /IN T V S S L E D 1 2 3 4 5 6 7 8 9 H T 4 8 R 0 6 A -1 5 1 k W 4 7 0 p F V D D 2 2 0 m F / 1 6 V 1 0 0 k W 1 0 k W 0 .1 m F S W S P D T May 17, 2007 6 Rev. 1.10 2 S C 1 8 1 5 Y HT672A Package Information 8-pin DIP (300mil) Outline Dimensions A 8 B 5 4 1 H C D a G E I F Symbol Rev. 1.10 Dimensions in mil Min. Nom. Max. A 355 ¾ 375 B 240 ¾ 260 C 125 ¾ 135 D 125 ¾ 145 E 16 ¾ 20 70 F 50 ¾ G ¾ 100 ¾ H 295 ¾ 315 I 335 ¾ 375 a 0° ¾ 15° 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 Ó 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. 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. Rev. 1.10 8 May 17, 2007