1 pcs : TMS3705GDRQ1 - NFC/RFID Tags & Transponders LF Reader IC 16-SOIC -40 to 85

TMS3705 Transponder Base Station IC Texas Instruments TMS3705 Transponder Base Station IC is used to drive the antenna of a TI-RFID transponder system, send data modulated on the antenna signal, and detect and demodulate the response of the transponder. The response of the transponder is a frequency shift keyed (FSK) signal. The high or low bits are coded in two different high-frequency signals (134.2kHz for low bits and 123kHz for high bits, nominal). According to an internally stored code, the Texas Instruments TMS3705 induces these signals in the antenna coil. The energy that the transponder needs to send out the data is stored in a charged capacitor in the transponder. The antenna field charges this capacitor in a preceding charge phase. The IC has an interface to an external microcontroller.