JMY504 series are RFID reader/writer module with UART and IIC serial ports. JMY504 has various functions and supports multi ISO/IEC standard of contactless card; the cards from different suppliers. The RF protocol is complex. But the designer combined some frequent used command of RF card and then user could operate the cards with full function by sending simple command to the module through IIC or UART interface. And the module and antenna are separate design. The impedance between RF module and antenna was tuned by impedance analyzer. And then the module has excellent performance and stability. The module and antenna is separate design. 4 wires are linked the antenna and module. Normally the wire should be less than 200mm, or it will affect the module's performance and stability.

    Qualifications:
     Model number:JMY504A,JMY504C
     PCD: NXP RC522, RC523
     Working frequency: 13.56MHz
     RF standard: ISO14443A, ISO14443B
     Operating distance: 80mm(depending on card and antenna design)
     Anti collision ability: Full function anti collision; be able to process multi-cards simultaneously; be able to set operate single card only
     Auto detecting card: Supported, default OFF
     EEPROM: 512 Bytes
     Interface: IIC & UART (selected by SPS pin, recommend to use IIC)
     Communication rate: IIC 400Kbps, UART 19.2Kbps/115.2Kbps
     Max.command length: 254 Bytes
     Interface level: 3.3V(TTL level; 5V tolerance)
     Power supply: DC 5.0V
     Power consumption: 50mA
     Dimension: 42mm×21mm×8mm
     Package: DIP32
     Weight: about 15g
     Operating temperature: -25 ~ +85 ℃ (-77 ~ +185°F)
     Storage temperature: -40 ~ +125 ℃ (-104 ~ +257°F)
     ISP: Supported
     RoHS: Compliant