Spec

Manufacturer

Microchip

NXP

Frequency

125 kHz

13.56 MHz

Protocol

EM4100, EM4102, T5557, Hitag, Indala, and other LF formats

ISO/IEC 14443-A/B, ISO/IEC 15693, FeliCa, NTAG, MIFARE Classic, MIFARE Plus, MIFARE DESFire, NFC Forum protocols

Memory

363 bits total (330 bits user programmable)

N/A (reader IC with 512-byte FIFO buffer)

Interface

RF (contactless)

SPI, I2C, UART (serial interfaces to host)

Security

32-bit password protection for read/write operations

AES-128, 3DES encryption support, secure key storage