HT6720 13.56MHz RFID Transponder Features · Very low operating current (4mA @ VDD=3V) · OTP data memory · Wide range operating voltage · 13.56MHz carrier frequency · Batteryless RF transponder · Output data baud rate: 4kbps (Typ.) @ VDD=3V · Data transmission in read-only operation · PWM/ASK modulation · Max. of 64-bits customer programmable data · Built-in voltage limiter · 16-bits CRC error detection code Applications · Interactive leisure products · Material management · Security system · Animal management · Access control · Personnel working time record · Anti-counterfeit devices · Car park monitoring system 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 HT6720 is an RF transponder IC with 13.56MHz RF carrier, which provides a low cost batteryless 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. HT6720 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, HT6720 offers a very cost effective solution for RF contactless 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 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 D a ta P r o c e s s in g H F 1 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 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. 1.00 1 n d M m in g o l V S S C L K August 13, 2001 HT6720 Pad Assignment H F 2 V D D V P A 1 6 5 (0 ,0 ) 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. Pad Coordinates Unit: mm Pad No. X 1 2 3 Y Pad No. X Y -256.65 357.34 4 228.70 -256.65 96.10 -361.99 5 219.80 -361.37 338.59 -378.15 6 88.89 332.15 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) ..........................................13.5V 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. 1.00 2 August 13, 2001 HT6720 Electrical Characteristics Symbol VDD Test Conditions Parameter Operating Voltage ¾ VDD pad voltage 3V Idd Operating Current Rm Modulation Resistance VLCL LC Input Limiter Voltage BR Conditions VDD 5V ¾ Voltage limiter not started 5V ¾ Typ. Max. Unit 2.4 ¾ 5 V ¾ 4 ¾ mA ¾ 10 ¾ mA ¾ 320 ¾ W ¾ 6.5 ¾ V 3V VDD vs VSS ¾ 4 ¾ Kbps 5V VDD vs VSS ¾ 5.5 ¾ Kbps ¾ Output Data Baud Rate Min. ¾ Functional Description The HT6720 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 0 D a ta Timing & Code Package T ra n s p o n d e r H T 6 7 2 0 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. 1.00 3 s p a c e ( 9 6 b its ) August 13, 2001 HT6720 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 HT6720, 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, HT6720 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 0 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 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 O th e r C o n tr o lle r E n e rg y H T 6 7 2 0 R F o s c & R e c e iv e r A N T 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 lo w c o s t M C U : H T 4 8 R 0 5 A /H T 4 8 R 0 6 A Rev. 1.00 4 August 13, 2001 HT6720 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 0 R F o s c & R e c e iv e r A N T 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 0 R F o s c & R e c e iv e r A N T 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 2 1 X X X /H T 8 4 X X X /H T 8 6 X X X Rev. 1.00 5 August 13, 2001 HT6720 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: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031 Tel: 0755-8346-5589 Fax: 0755-8346-5590 ISDN: 0755-8346-5591 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holmate Semiconductor, Inc. (North America Sales Office) 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2001 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. 1.00 6 August 13, 2001