HT672A_07 [HOLTEK]
13.56MHz RFID Transponder; 13.56MHz的RFID应答器
| 型号： | HT672A_07 |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | 13.56MHz RFID Transponder |
| 文件： | 总8页 (文件大小：116K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT672A
13.56MHz RFID Transponder
Features
·
·
13.56MHz carrier frequency
Low low operating current (15mA @ VDD=2V)
·
·
Output data baud rate: 5kbps (Typ.)
Wide range operating voltage
·
·
PWM/ASK modulation
Battery less RF transponder
·
·
Built-in voltage limiter
Data transmission in read-only operation
·
·
8-pin DIP package available for engineering
Max. of 64-bits customer programmable data
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 HT672Ais an RF transponder IC with 13.56MHz RF
carrier, which provides a low cost battery less 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.
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 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.
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 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, HT672A offers a very cost effective solution
for RF contact less detection system.
A code area of 64-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.
Block Diagram
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Rev. 1.10
1
May 17, 2007
HT672A
Pin Assignment
Pad Assignment
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1
2
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8
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6
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(
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Note: The 8-pin DIP package type is supplied only
for engineering evaluation purposes and will not be
available in production volumes.
4
2
3
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
2
3
357.34
-361.99
-378.15
4
5
6
228.70
219.80
88.89
-256.65
-256.65
96.10
-361.37
338.59
332.15
Pad Description
Pad Pad
No. Name
Internal
I/O
Description
Connection
CMOS
CMOS
¾
1
2
3
4
5
6
HF2
HF1
VSS
CLK
VPA
VDD
I/O
I/O
¾
I
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
CMOS
¾
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.
I
¾
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 reliability.
Rev. 1.10
2
May 17, 2007
HT672A
Electrical Characteristics
Test Conditions
Conditions
Symbol
VDD
Parameter
Operating Voltage
Operating Current
Min.
Typ.
Max.
Unit
VDD
¾
VDD pad voltage
2
3
4
V
mA
mA
W
2V
3V
5V
15
¾
¾
¾
¾
¾
Idd
Voltage limiter not started
600
320
6.5
5
Rm
Modulation Resistance
LC Input Limiter Voltage
Output Data Baud Rate
¾
¾
¾
¾
VLCL
BR
V
¾
¾
¾
3V
VDD vs VSS
2.5
7.5
Kbps
Functional Description
Operation Concept
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.
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
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.
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Rev. 1.10
3
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 programma-
ble.
Category ID: Can be used to store the application field
information code.
Agent ID: This 8-bit wide code is not customer program-
mable and is supplied together with the data writer after
registering to Holtek. The writer generates the code au-
tomatically.
Product ID: Storing the contents of the user ID number
or data.
Data CRC: A 16 bits of CRC code is generated automat-
ically by the writer.
Application Circuits
Tag
Atag consists of a PCB (or Mylar film) with printed coil, HT672Aand 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
May 17, 2007
HT672A
1-chip Solution (I)
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Rev. 1.10
5
May 17, 2007
HT672A
RFID Reader
2
S
C
1
8
1
5
Y
Rev. 1.10
6
May 17, 2007
HT672A
Package Information
8-pin DIP (300mil) Outline Dimensions
A
8
5
B
1
4
H
C
D
I
a
G
E
F
Dimensions in mil
Nom.
Symbol
Min.
355
240
125
125
16
Max.
A
B
C
D
E
F
G
H
I
375
260
135
145
20
¾
¾
¾
¾
¾
50
70
¾
100
¾
¾
¾
295
335
0°
315
375
15°
¾
a
¾
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 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 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
8
May 17, 2007
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