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HF 13.56 MHzSTMicroelectronics

ST25R100

The STMicroelectronics ST25R100 is an reader IC, with 256-byte FIFO, 16 bytes OTP, operating at 13.56 MHz, under ISO/IEC 14443A/NFC-A at 106 kbit/s, ISO/IEC 14443B/NFC-B at 106 kbit/s, ISO/IEC 15693/NFC-V up to 53 kbit/s, NFC Forum T1T, T2T, T4T and T5T tag types.

Cost-optimized NFC reader IC for ISO/IEC 14443 Type A in compact mobile and IoT devices.

Official Datasheet ↗
Frequency
13.56 MHz
Protocol
ISO/IEC 14443A/NFC-A at 106 kbit/s, ISO/IEC 14443B/NFC-B at 106 kbit/s, ISO/IEC 15693/NFC-V up to 53 kbit/s, NFC Forum T1T, T2T, T4T, and T5T tag types
Memory
256-byte FIFO, 16 bytes OTP
Interface
SPI up to 6 Mbit/s
Temp Range
-25°C to +85°C
Form Factor
UFQFPN24 (4x4 mm)

Full Specifications

ManufacturerSTMicroelectronics
Frequency CategoryHF 13.56 MHz
Frequency13.56 MHz
ProtocolISO/IEC 14443A/NFC-A at 106 kbit/s, ISO/IEC 14443B/NFC-B at 106 kbit/s, ISO/IEC 15693/NFC-V up to 53 kbit/s, NFC Forum T1T, T2T, T4T, and T5T tag types
Memory256-byte FIFO, 16 bytes OTP
InterfaceSPI up to 6 Mbit/s
Temperature Range-25°C to +85°C
Form FactorUFQFPN24 (4x4 mm)
SecurityNot specified in datasheet

Engineering Brief

The ST25R100 is an entry-level NFC/HF RFID reader IC designed for cost-sensitive consumer and industrial applications. It supports ISO14443A/B and ISO15693 protocols in reader/writer mode with a compact 4x4mm package. Operating from 2.7-5.5V, it features integrated voltage regulators, adjustable ASK modulation, automatic gain control, and improved low-power card detection via inductive wake-up. The device interfaces via SPI up to 6 Mbit/s and includes a 256-byte FIFO for data handling.

Typical Applications

Standards & Compliance

Frequently Asked Questions

What protocols does the ST25R100 NFC reader support?

The ST25R100 supports ISO/IEC 14443A (NFC-A), ISO/IEC 14443B (NFC-B), and ISO/IEC 15693 (NFC-V) protocols. It can read NFC Forum tag types T1T, T2T, T4T, and T5T.

What is the operating voltage range of the ST25R100?

The ST25R100 operates from 2.7V to 5.5V supply voltage with integrated voltage regulators, making it suitable for battery-powered mobile and IoT applications.

What is the SPI interface speed of the ST25R100?

The ST25R100 features an SPI interface with speeds up to 6 Mbit/s for communication with the host microcontroller.

Does the ST25R100 support card emulation mode?

No, the ST25R100 is a reader/writer IC designed for reader mode operation only. It does not support card emulation or peer-to-peer NFC modes.

What is the FIFO buffer size in the ST25R100?

The ST25R100 includes a 256-byte FIFO buffer for data handling during NFC transactions, plus 16 bytes of one-time programmable (OTP) memory.

What package size does the ST25R100 come in?

The ST25R100 is available in a compact 4x4mm package, making it ideal for space-constrained mobile and IoT device designs.

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Manufacturer
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Standards
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