Holtek Semiconductor HT672A
The HT672A is an RF transponder IC with 13.56MHz RF carrier, which provides a low cost battery less 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. The response data is transmitted using PWM/ASK modulation.| Part No. | HT672A |
|---|---|
| Datasheet | HT672A Download |
| Manufacturer |  Holtek Semiconductor |
| Description | 13.56MHz RFID Transponder |
| Buy | Stock & Price |
FEATURES
● Low low operating current (15mA @ VDD=2V)● Wide range operating voltage
● Battery less RF transponder
● Data transmission in read-only operation
● Max. of 64-bits customer programmable data
● 16-bits CRC error detection code
● OTP data memory evaluation - not for volume production
APPLICATIONS
● Interactive toys● Security system
● Access control
● Anti-counterfeit for commercial product
GENERAL DESCRIPTION
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 response signal (pre-programmed in the OTP memory) is serially transmitted out. 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.
