HT672A

www.DataSheet4U.com HT672A 13.56MHz RFID Transponder · 13.56MHz carrier frequency · Output data baud rate: 5kbps (Typ.) · PWM/ASK modulation · Built-in voltage limiter · 8-pin DIP package available for engineering 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 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. 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. 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 a 96 bits one time programmable memory OTP, with a 16-bit CRC code (up to 64 bits reserved for customer). The effective d...