• Belonging to ST25 family, which includes all
NFC/RF ID tag and reader products from ST
I
2C interface
• Two-wires I2C serial interface supports
400 kHz protocol
• Single supply voltage:
– 1.8 V to 5.5 V
• Byte and Page Write (up to 4 bytes)
• Random and Sequential read modes
• Self-timed programming cycle
• Automatic address incrementing
• Enhanced ESD/latch-up protection
• I²C timeout
Contactless interface
• ISO 15693 and ISO 18000-3 mode 1 compatible
• 13.56 MHz ± 7 kHz carrier frequency
• To tag: 10% or 100% ASK modulation using 1 out
of 4 (26 Kbit/s) or 1 out of 256 (1.6 Kbit/s) pulse
position coding
• From tag: load modulation using Manchester
coding with 423 kHz and 484 kHz subcarriers
in low (6.6 kbit/s) or high (26 kbit/s) data rate
mode. Supports the 53 kbit/s data rate with
Fast commands
• Internal tuning capacitance: 27.5pF
• 64-bit unique identifier (UID)
• Read Block & Write (32-bit blocks)
Digital output pin
• User configurable pin: RF write in progress or
RF busy mode
Energy harvesting
• Analog pin for energy harvesting
• 4 sink current configurable ranges
Temperature range
• From –40 to 85 °C
Memory
• 4-Kbit EEPROM organized into:
– 512 bytes in I2C mode
– 128 blocks of 32 bits in RF mode
• Write time
– I2C: 5 ms (max.)
– RF: 5.75 ms including the internal Verify time
• Write cycling endurance:
– 1 million write cycles at 25 °C
– 150k write cycles at 85 °C
• More than 40-year data retention
• Multiple password protection in RF mode
• Single password protection in I2C mode
• Package
– SO8 (ECOPACK2®)
– TSSOP8 (ECOPACK2®)
– UFDFPN8 (ECOPACK2®)