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HT6740 13.56MHz RFID Transponder
Features
* Very low operating current (15mA at VDD=2V) * Wide range operating voltage * Batteryless RF transponder * Data transmission in read-only operation * Max. of 6 bits customer programmable data * 6 bits checksum for error rejection * OTP data memory * 13.56MHz carrier frequency * Output data baud rate: 10kbps (Typ.) at VDD=3V * PWM/ASK modulation * Built-in voltage limiter * Non anti-collision function (Default) * 8-pin DIP package available for engineering evalua-
tion - not for volume production
Applications
* Interactive leisure products * Security system * Access control * Anti-counterfeit devices * Material management * Animal management * Personnel working time record * Car park monitoring system
General Description
The HT6740 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. HT6740 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 17 bits one time programmable memory OTP, with a 6-bit check sum (up to 11 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, HT6740 offers a very cost effective solution for RF contactless detection system. A code area of 11 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. The HT6740 has a built-in anti-collision function. Customers can choose with anti-collision or with non anti-collision function in the program software tool supplied by Holtek.
Block Diagram
HF Random C o u n te r S y s te m C lo c k G e n e ra to r VCC 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 f/4
D a ta P r o c e s s in g
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
T e s t B lo c k
VSS
VPP
CLK
Rev. 1.20
1
May 17, 2007
HT6740
Pad Assignment Pad Assignment
VCC VPP
HF 1 NC 2 NC 3 HFI 4
8 7 6 5 HT6740 8 D IP -A
VCC VPP CLK GND
HF 1
6 5
(0 ,0 )
Note:
The 8-pin DIP package type is supplied only for engineering evaluation purposes and will not be available in production volumes.
HF1
2 3
4 CLK
Chip size: 965914 (mm)2 * The IC substrate should be connected to VSS in the PCB layout artwork.
GND
Pad Coordinates
Pad No. 1 2 3 X -272.025 -272.025 132.225 Y 303.662 -298.538 -314.688 Pad No. 4 5 6 X 266.324 257.400 145.924 Y
Unit: mm
-297.913 312.150 312.112
Pad Description
Pad No. Pad Name 1 2 3 4 5 6 HF HF1 VSS CLK VPP 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. (Suggest 12.5V for programming) Open for normal operation, +6V 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. 1.20
2
May 17, 2007
HT6740
Electrical Characteristics
Symbol VDD Idd Rm VLCL BR Parameter Operating Voltage Operating Current 3V Modulation Resistance LC Input Limiter Voltage Output Data Baud Rate 3.3V 3/4 3V VDD vs VSS Test Conditions VDD 3/4 2V Conditions VDD pad voltage 3/4 3/4 3/4 3/4 Min. 2.0 3/4 3/4 3/4 3/4 5 Typ. 3 15 400 320 6.5 10 Max. 4 3/4 3/4 3/4 3/4 15 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. The HT6740 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.
T ra n s p o n d e r E n e rg y
A total of 23 bits of OTP memory space is provided, from which 6 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. Anti-Collision Function HT6740 build in anti-collision function. The probability which reader could find all (ex.5 tags): Under 10K baud rate. During 103ms(R)0.8293; During 308ms (R)0.9950; During 408ms(R)0.9992 and during 510ms is 0.99995. Option Function Option 0: 0 continuous (Default) 1 anti-collision
Reader
H T6740
R F osc & C o n tr o lle r
D a ta
Timing & Code Package
( 5 b its ) S y n c . D a ta C u s to m e r ID ( 6 b its ) P ro d u c t Code ( 6 b its ) C heck Sum
T o ta l E P R O M
s p a c e ( 1 7 b its )
Rev. 1.20
3
May 17, 2007
HT6740
Code Package A total of 23 bits information can be stored in the HT6740, from which 6 bits are customer programmable.
* Sync. data: Including 4 bits (which low/high duty * Customer ID: This 5-bit wide code is not customer
programmable and is supplied together with the data writer after register to Holtek. The writer generates the code automatically.
* Product code: Storing the contents of the user ID
length is 50%)
* Mark data: 2 bits (always high signal).
number or data.
* Check sum: A 6 bits of checksum code is generated
automatically by the writer.
Application Circuits
Tag A tag consists of a PCB (or Mylar film) with printed coil, HT6740 and a housing. The housing can be of various shapes.
T a g H o u s in g
PCB HF HF1
H T6740
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
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
H T6740
ANT
ANT
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
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 -1 /H T 4 8 R 0 6 A -1
Rev. 1.20
4
May 17, 2007
HT6740
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
H o lte k R e a d e r S o lu tio n
H T6740
ANT
ANT
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
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
H o lte k R e a d e r S o lu tio n
H T6740
ANT
ANT
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 orLC 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. 1.20
5
May 17, 2007
HT6740
V 0~20pF 200pF 0 .1 m F 0 .7 3 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 0 .1 m F 82pF 1 820kW 3 2 PA3 PA2 PA1
CC
330W LED
330W LED
330W LED
330W LED
H E8050S
PA4 PA5 3 2 8 1 2 .2 k W 5 8 4 PA6 PA0 PA7
18 17 16 15 5 PB2 OSC2 14
1kW
F
36kW
1kW
10kW
RFID Reader Application Circuit
200pF 680W
200pF
10kW 1kW 0 .1 m F
4
H T82V732 6 10kW 560kW
7 6 4 0 .0 0 2 2 m F 75W H T82V732 7 8 9
100kW 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
10kW
0 .1 m F
F
:TX :RX
:O SC :PW R
470pF
Rev. 1.20
6
May 17, 2007
HT6740
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. 1.20
7
May 17, 2007
HT6740
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: 86-755-8616-9722 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. 1.20
8
May 17, 2007

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