{"license":"Free for any use with attribution link to rfid-datasheet.com","citation":"RFID-Datasheet.com Chip Database — Roxtron","source":"https://rfid-datasheet.com/chip/rc522","methodology":"https://rfid-datasheet.com/methodology","data_notes":"Includes automated enrichment. Null means unknown; last_checked is link availability, not technical review. Manufacturer documents govern specifications.","generated_at":"2026-10-28T11:40:26.591Z","chip":{"id":"c4a738a8-255c-4d12-a00d-4e090ab0cb1c","slug":"rc522","name":"RC522","manufacturer":"NXP","frequency_category":"HF 13.56 MHz","short_description":"Highly integrated RFID reader/writer IC for contactless communication at 13.56 MHz supporting ISO14443A/MIFARE","manufacturer_url":"https://www.nxp.com/products/rfid-nfc/nfc-hf/nfc-readers/nfc-reader-solution-for-access-management-mfrc522:MFRC522","frequency":"13.56 MHz","protocol":"ISO/IEC 14443-A, MIFARE Classic, MIFARE Ultralight, MIFARE DESFire, NTAG","memory":"64-byte FIFO buffer internal (reader IC, not tag memory)","interface":"SPI, I2C, UART (serial interfaces for host communication); RF (contactless at 13.56 MHz)","temp_range":"-40°C to +85°C","form_factor":"HVQFN32 (5x5 mm), HVSON8","security":"CRC coprocessor, parity generation/checking, cryptographic support for MIFARE authentication","use_cases":["access-control","payments-transit","asset-tracking"],"engineering_brief":"The MFRC522 is a highly integrated 13.56 MHz contactless reader/writer IC designed for communication with ISO/IEC 14443-A compliant transponders including MIFARE cards. It features a compact HVQFN32 package, multiple serial interfaces (SPI, I2C, UART) for easy microcontroller integration, and an internal 64-byte FIFO buffer for efficient data handling. The IC integrates the complete RF transceiver, modulation/demodulation, and cryptographic authentication logic, making it ideal for low-cost access control, contactless payment, and RFID reader applications requiring minimal external components.","enriched":true,"url_status":"ok","link_status":"invalid","last_checked":"2026-10-28T03:31:34.317+00:00","last_status_code":404,"last_content_type":"text/html","created_at":"2026-07-22T03:00:28.813953+00:00","manufacturer_id":"6daaf1cc-d0e6-40c7-aba0-a08b4c3493fe","chip_type":"reader_ic","dual_interface":false,"is_family_hub":false,"meta_description":"NXP MFRC522: 13.56 MHz contactless reader/writer IC for ISO14443A/MIFARE cards with SPI/I2C/UART interfaces, 64-byte FIFO, ideal for access control.","faq":[{"a":"The MFRC522 supports ISO/IEC 14443-A compliant cards including MIFARE Classic, MIFARE Ultralight, MIFARE DESFire, and NTAG series tags. It operates at 13.56 MHz and handles contactless read/write operations with these transponder types.","q":"What RFID cards does the MFRC522 support?"},{"a":"The MFRC522 offers three serial interface options: SPI (most common), I2C, and UART. Select the desired mode via configuration pins and connect to your microcontroller's corresponding interface. It requires minimal external components for a complete RFID reader solution.","q":"How do I connect MFRC522 to a microcontroller?"},{"a":"Yes, the MFRC522 includes built-in cryptographic support for MIFARE authentication, plus a CRC coprocessor and parity generation/checking. It handles the complete authentication protocol for secure MIFARE Classic transactions.","q":"Does the MFRC522 support MIFARE authentication?"},{"a":"Read range depends on antenna design and power supply, but typically achieves 4-6 cm with standard card-sized antennas. The MFRC522 integrates the RF transceiver and modulation/demodulation circuitry for 13.56 MHz contactless communication.","q":"What is the read range of the MFRC522?"},{"a":"Yes, the MFRC522 is a full reader/writer IC capable of both reading from and writing to ISO14443A-compliant tags. The 64-byte FIFO buffer facilitates efficient bidirectional data exchange with supported transponders.","q":"Can the MFRC522 write data to RFID tags?"},{"a":"Yes, RC522 and MFRC522 refer to the same NXP chip. MFRC522 is the full part number, while RC522 is the commonly used shortened version in hobbyist and module documentation.","q":"Is MFRC522 the same as RC522?"}],"standards":["iso-14443a"],"alternatives":["10d9033b-c530-423b-947a-129bc44da369","c3101d2d-cea7-4f9a-b6c1-033fcee82aa1","8b42248c-3481-4686-b3e8-8fe2a2cdb73e","e7dc291f-107a-44e1-8465-1fffd4371cfb","d4da8cff-bebf-4104-8d82-5af8e1c412ee","9ac402ab-24d4-42dd-b75a-bf6a0ae590f2","3b93ecf9-2061-4640-bbe4-804bfbe8eecc","17ac1e37-4bb0-4ff1-b815-10ecd95b9384"],"no_direct_competitor":false,"long_form_html":null,"og_image_url":null,"canonical_url":"https://rfid-datasheet.com/chip/rc522"}}