Features / Specs
- Board Model: RFID-RC522
- RFID IC: MFRC522 Compatible Chip (Not Original NXP Chip)
- Operating Voltage Range: 2.5V – 3.3VDC (Recommended 3.3VDC)
- Operating Current (Typical): ~(13 – 26mA) @ 3.3VDC
- Operating Current: < 30mA
- Idle Current (Typical): ~(10 – 13mA) @ 3.3VDC
- Sleep Current: < 80μA
- Operating Frequency: 13.56MHz
- Operating Temperature Range: ~(-20°C to +80°C)
- Relative Humidity Range: 5% to 95%
- Comms Interface: SPI (Up to 10M-bit/s) / I2C (Up to 3.4MHz) / UART
- Supported Card Types: MIFARE S50 / MIFARE S70 / MIFARE Ultralight / MIFARE Pro / MIFARE Desfire
- Header Pin Pitch: 2.54mm (Breadboard Compatible)
- Board Dimensions: 39.25mm x 59.9mm (± 0.25mm)
- Mounting Hole Diameter: ~ 3.3mm (M3)
Pin Description
- SDA-> SPI Chip Select / I2C Serial Data / UART RX
- SCK-> SPI Serial Clock Input
- MOSI-> SPI Serial Data Input
- MISO-> SPI Serial Data Output I2C Serial Clock / UART TX
- IRQ-> Interrupt Request Output
- GND-> Ground
- RST-> Reset Input Active Low (Module is Reset on Rising Edge)
- VCC-> Supply Voltage (2.5 – 3.3VDC)




