1. Introduction
This data sheet describes the functionality of the MFRC531 Integrated Circuit (IC). It
includes the functional and electrical specifications and from a system and hardware
viewpoint gives detailed information on how to design-in the device.
Remark: The MFRC531 supports all variants of the MIFARE Mini, MIFARE 1K,
MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus RF
identification protocols. To aid readability throughout this data sheet, the MIFARE Mini,
MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus
products and protocols have the generic name MIFARE.
2. General description
The MFRC531 is a highly integrated reader IC for contactless communication at
13.56 MHz. The MFRC531 reader IC provides:
• outstanding modulation and demodulation for passive contactless communication
• a wide range of methods and protocols
• a small, fully integrated package
• pin compatibility with the MFRC500, MFRC530 and SLRC400
All protocol layers of the ISO/IEC 14443 A and ISO/IEC 14443 B communication
standards are supported provided:
• additional components, such as the oscillator, power supply, coil etc. are correctly
applied.
• standardized protocols, such as ISO/IEC 14443-4 and/or ISO/IEC 14443 B
anticollision are correctly implemented
The MFRC531 supports contactless communication using MIFARE higher baud rates
(see Section 9.12 on page 38
). The receiver module provides a robust and efficient
demodulation/decoding circuitry implementation for compatible transponder signals (see
Section 9.10 on page 32
).
The digital module, manages the complete ISO/IEC 14443 standard framing and error
detection (parity and CRC). In addition, it supports the fast MIFARE security algorithm for
authenticating the MIFARE products (see Section 9.14 on page 40
).
The internal transmitter module (Section 9.9 on page 29
) can directly drive an antenna
designed for a proximity operating distance up to 100 mm without any additional active
circuitry.
MFRC531
Standard ISO/IEC 14443 A/B reader solution
Rev. 3.6 — 27 February 2014
056636
Product data sheet
COMPANY PUBLIC
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