FM1702SL is a special chip for non-contact card reader based on ISO14443 standard. It adopts 0.6 micron CMOS EEPROM technology, supports ISO14443 typeA protocol, and supports MIFARE encryption algorithm. The three - way power supply of the chip can be applied to low voltage. Philips RC500, RC530, RC531, RC632 and other card reader chips. The chip is highly integrated with analog modulation and demodulation circuit, which only needs the least amount of peripheral circuit to work. It supports 6 kinds of microprocessor interfaces, and the digital circuit has TTL and CMOS voltage working modes. Applicable to all kinds of billing system card reader application. In particular, FM17XXL series chips, the minimum operating voltage of the three-way power supply can be up to 2.9V, which is better than similar products of other companies