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參數資料
| 型號： | HT6720 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 13.56MHz RFID Transponder |
| 中文描述： | 13.56的RFID應答器 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 112K |
| 代理商： | HT6720 |
HT6720
13.56MHz RFID Transponder
Block Diagram
Rev. 1.00
1
August 13, 2001
Features
Very low operating current (4 A @ V
DD
=3V)
Wide range operating voltage
Batteryless RF transponder
Data transmission in read-only operation
Max. of 64-bits customer programmable data
16-bits CRC error detection code
OTP data memory
13.56MHz carrier frequency
Output data baud rate: 4kbps (Typ.) @ V
DD
=3V
PWM/ASK modulation
Built-in voltage limiter
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 HT6720 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.
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 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, HT6720 offers a very cost effective solution
for RF contactless 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.
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