HT672B [HOLTEK]
13.56MHz RFID Transponder; 13.56MHz的RFID应答器
| 型号： | HT672B |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | 13.56MHz RFID Transponder |
| 文件： | 总8页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT672B
13.56MHz RFID Transponder
Features
·
·
Wide range operating voltage
13.56MHz carrier frequency
·
·
Batteryless RF transponder
Output data baud rate: 10kbps at VDD=3V
·
·
Data transmission in read-only operation
PWM/ASK modulation
·
·
6-bits sync + 32-bits data + 8-bits CRC
Built-in voltage limiter
·
·
OTP data memory
8-pin DIP package
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 HT672B is a RF transponder IC operating with
13.56MHz RF carrier, which provides a low cost
batteryless transponder solution with the addition of
merely an external inductor. The inductor and internal
capacitor form a LC tank which inducing voltage from
the radiated 13.56MHz carrier signal generated from the
reader antenna. HT672B 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 serial 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 40 bits. One
Time Programmable memory (OTP) (up to 32 bits re-
served for customer) in the chip, with a 8-bits checksum
code. The effective detection range for a small sized an-
tenna is 2cm~10cm which is dependent on antenna for-
mat & reader design. The larger the antenna loop used
the longer the detection range. It is advisable to use
larger antenna to attain a 15cm detection range. Imple-
menting Holtek¢s advanced OTP and low power tech-
nology, HT672B offers a very cost effective solution for
RF contactless detection system. A code area of
32-bits(max.) wide is provided so customers can pro-
gram the device using the specified programmer sup-
plied by Holtek. The pre-programmed Ics are also
available upon customer¢s request.
Block Diagram
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Rev. 1.10
1
November 23, 2004
HT672B
Pin Assignment
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1
2
3
4
8
7
6
5
N
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Pad Assignment
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(
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3
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Chip size: 36.4´36.4 (mil)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
303.663
-298.537
-314.687
4
5
6
247.074
238.174
126.674
-252.875
-252.875
112.975
-297.912
284.663
284.663
Pad Description
Pad
No.
Pad
Name
Internal
Connection
I/O
Description
1
2
3
4
HF
I/O
I/O
¾
I
CMOS
CMOS
¾
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
HF1
VSS
CLK
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
Rev. 1.10
2
November 23, 2004
HT672B
Absolute Maximum Ratings
Supply Voltage (VDD) ............................................5.5V
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.
Electrical Characteristics
Test Conditions
Symbol
VDD
Parameter
Min.
Typ.
Max.
Unit
VDD
¾
Conditions
VDD pad voltage
Operating Voltage
2
3
4
V
mA
mA
W
IDD
IDD
Rm
VLCL
BR
Operating Current
2V
15
¾
¾
¾
¾
¾
¾
¾
¾
5
¾
¾
¾
¾
15
Operating Current
3V
400
320
6.5
10
Modulation Resistance
LC Input Limiter Voltage
Output Data Baud Rate
3.3V
V
¾
3V
VDD vs VSS
Kbps
Functional Description
Operation Concept
The HT672B 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 internal RC-oscillator, the tran-
sponder is actuated to transmit its internal data serially
by means of damping the LC tank.
A total of 40 bits of OTP memory space is provided,
from which 20 bits wide are customer programmable,
which can be programmed using the specified program-
mer supplied by Holtek. The pre-programmed Ics are
also available upon customer¢s request.
The reader receiving the transponder¢s data by means
of detecting the energy variation on it¢s own antenna,
and recognize the information with a microcontroller.
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Rev. 1.10
3
November 23, 2004
HT672B
Timing & Code Package
(
1
2
b
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2
0
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(
8
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·
Customer ID: This 12-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
Atotal of 40 bits information can be stored in the HT672B,
from which 20 bits are customer programmable.
·
Sync. data: Including 4 bits
·
·
Product code: Storing the contents of the user ID
number or data.
(which low/high duty length is 50%)
·
Mark data: 2 bits (always high signal).
Check sum: A 8 bits of checksum code is generated
automatically by the writer.
Application Circuits
Tag
Atag consists of a PCB (or Mylar film) with printed coil, HT672B 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
HT672B
1-chip Solution (I)
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1-chip Solution (II)
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Rev. 1.10
5
November 23, 2004
HT672B
RFID Reader
2
S
C
1
8
1
5
Y
m
0 . 0 0 2 2 F
Rev. 1.10
6
November 23, 2004
HT672B
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
November 23, 2004
HT672B
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
8
November 23, 2004
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