ISO/IEC 14443-2:2020

Overview

ISO/IEC 14443-2:2020 - Radio frequency power and signal interface - is part of the ISO/IEC 14443 series for contactless proximity objects (proximity cards and security devices). This fourth-edition standard defines the electrical and radio-frequency characteristics required to provide power and bi‑directional communication between a proximity coupling device (PCD) (reader) and a proximity card or object (PICC). It covers field characteristics, modulation and coding methods, and limits for electromagnetic disturbance, but does not prescribe how coupling fields are generated or national electromagnetic exposure compliance procedures.

Key Topics

• Power transfer: characteristics of the operating field used to power passive proximity cards (operating volume, field strength and frequency ranges).
• Signal interface: general requirements for bi‑directional communication between PCD and PICC.
• Communication Type A and Type B: electrical signalling, bit rates, modulation schemes and coding:
  • PCD→PICC: modulation formats, bit representation and timing.
  • PICC→PCD: load modulation, subcarrier use, modulation indices and reception constraints.
• Modulation & coding terms: references to ASK, BPSK, NRZ‑L, Manchester and modified Miller coding methods (terms and definitions clarified).
• Timing & synchronization: guard times (TR0/TR1), bit durations and pulse timing constraints to ensure reliable exchange.
• Electromagnetic disturbance levels: limits for parasitic emissions and defined limits for PCDs and PICCs to minimize interference.
• Compliance & testability: references normative test methods and the use of Reference and Active Reference PICCs to define operating volumes and compliance verification.

Applications

ISO/IEC 14443-2:2020 is directly applicable to the design, manufacture and certification of:

• Contactless smart cards and tags (proximity cards).
• Card readers / POS terminals and other proximity coupling devices.
• Secure ID documents (access control badges, e‑ID, e‑passports when applicable).
• Systems employing short‑range contactless communication where harmonized RF power and signal interfaces are required.

Adoption ensures interoperability between PICCs and PCDs from different vendors and supports reliable implementations of contactless payment, access control and identity systems.

Who should use this standard

• Card and reader designers and manufacturers
• System integrators and solution architects for contactless systems
• Test laboratories and certification bodies
• Procurement and compliance teams specifying interoperable contactless hardware

Related standards

• ISO/IEC 14443-1 (physical characteristics)
• ISO/IEC 14443-3 (initialization and anticollision)
• ISO/IEC 10373-6 (test methods)
• Other contactless families (ISO/IEC 15693, ISO/IEC 10536) for longer-range or close-coupled card use

Keywords: ISO/IEC 14443-2:2020, contactless proximity cards, PCD, PICC, radio frequency power and signal interface, contactless smart cards, modulation, load modulation, RFID interoperability.