HT672B

HT672B 13.56MHz RFID Transponder www.DataSheet4U.com Features · Wide range operating voltage · Batteryless RF transponder · Data transmission in read-only operation · 6-bits sync + 32-bits data + 8-bits CRC · OTP data memory · 13.56MHz carrier frequency · Output data baud rate: 10kbps at VDD=3V · PWM/ASK modulation · Built-in voltage limiter · 8-pin DIP package 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 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 reserved for customer) in the chip, with a 8-bits checksum code. The effective detection rang...