HT6740 [HOLTEK]
13.56MHz RFID Transponder; 13.56MHz的RFID应答器
| 型号： | HT6740 |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | 13.56MHz RFID Transponder |
| 文件： | 总7页 (文件大小：875K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT6740
13.56MHz RFID Transponder
Features
·
·
13.56MHz carrier frequency
Very low operating current (15mA at VDD=2V)
·
·
Output data baud rate: 10kbps (Typ.) at VDD=3V
Wide range operating voltage
·
·
PWM/ASK modulation
Batteryless RF transponder
·
·
Built-in voltage limiter
Data transmission in read-only operation
·
·
Non anti-collision function (Default)
Max. of 6 bits customer programmable data
·
·
Anti-collision function (Option)
6 bits checksum for error rejection
·
OTP data memory
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 HT6740 is an RF transponder IC with 13.56MHz RF
carrier, which provides a low cost batteryless tran-
sponder solution when combined with an external in-
ductor. 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 re-
sponse signal (pre-programmed in the OTP memory) is
serially transmitted out. The response data is transmit-
ted using PWM/ASK modulation. Modulation of
13.56MHz is accomplished by damping the LC tank with
a fixed baud rate.
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 detec-
tion range. It is advisable to use larger antenna to attain
a 15 cm detection range.
Implementing Holtek¢s 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 cus-
tomers can program the device using the specified pro-
grammer supplied by Holtek. The pre-programmed ICs
are also available upon customer¢s request.
The HT6740 has a built-in anti-collision function. Cus-
tomers can choose with anti-collision or with non
anti-collision function in the program software tool sup-
plied by Holtek.
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
Block Diagram
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Rev. 1.10
1
November 23, 2004
HT6740
Pad Assignment
H
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1
6
5
(
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2
4
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Chip size: 965´914 (mm)2
* The IC substrate should be connected to VSS in the PCB layout artwork.
Pad Coordinates
Unit: mm
Pad No.
X
Y
Pad No.
X
Y
1
2
3
303.662
-298.538
-314.688
4
5
6
266.324
257.400
145.924
-272.025
-272.025
132.225
-297.913
312.150
312.112
Pad Description
Internal
Connection
Pad No. Pad Name I/O
Description
Connect to an antenna coil for normal operation. Open for data program-
ming.
1
2
HF
I/O
I/O
CMOS
Connect to an antenna coil for normal operation. Data I/O for program-
ming.
HF1
CMOS
3
4
VSS
CLK
Negative power supply, ground
¾
¾
I
CMOS
Open for normal operation. Clock input for programming.
Open for normal operation. High voltage supplies input for programming.
(Suggest 12.5V for programming)
5
6
VPP
VDD
I
¾
¾
Open for normal operation, +6V supply input for programming.
¾
Absolute Maximum Ratings
Supply Voltage (VDD) ...............................................6V
Supply Voltage (VPA) ..........................................12.5V
Input Voltage .............................VSS-0.3V to VDD+0.3V
Storage Temperature ...........................-50°C to 125°C
Operating Temperature ..............................0°C to 70°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 reliabil-
ity.
Rev. 1.10
2
November 23, 2004
HT6740
Electrical Characteristics
Test Conditions
Conditions
Symbol
VDD
Parameter
Operating Voltage
Operating Current
Min.
Typ.
Max.
Unit
VDD
¾
VDD pad voltage
2.0
3
4
V
mA
mA
W
2V
15
¾
¾
¾
¾
¾
5
¾
¾
¾
¾
15
Idd
3V
400
320
6.5
10
¾
Rm
Modulation Resistance
LC Input Limiter Voltage
Output Data Baud Rate
3.3V
¾
¾
VLCL
BR
V
¾
3V
VDD vs VSS
Kbps
Functional Description
Operation Concept
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 customer¢s request.
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 tran-
sponder 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 tran-
sponder is actuated to transmit its internal data serially
Anti-Collision Function
HT6740 build in anti-collision function. The probability
which reader could ²find² all (ex.5 tags): Under 10K
baud rate. During 103ms®0.8293; During 308ms
®0.9950; During 408ms®0.9992 and during 510ms is
0.99995.
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.
Option Function
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.
Option 0: 0 continuous (Default)
1 anti-collision
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Rev. 1.10
3
November 23, 2004
HT6740
·
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.
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
·
·
Product code: Storing the contents of the user ID
number or data.
length is 50%)
·
Mark data: 2 bits (always high signal).
Check sum: A 6 bits of checksum code is generated
automatically by the writer.
Application Circuits
Tag
Atag consists of a PCB (or Mylar film) with printed coil, HT6740 and a housing. The housing can be of various shapes.
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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 Holtek¢s 13.56MHz RF ID reader data.
2-Chip Solution
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Rev. 1.10
4
November 23, 2004
HT6740
1-chip solution (I)
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Rev. 1.10
5
November 23, 2004
HT6740
RFID Reader Application Circuit
2
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Rev. 1.10
6
November 23, 2004
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: 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 2004 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as-
sumes 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
7
November 23, 2004
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