ON Semiconductor’s N24RF family of NFC EEPROM products provides a scalable design solution which combines conventional EEPROM functionality with an integrated NFC interface for contactless reading and writing of data.
Like a conventional non-volatile EEPROM device, the N24RF includes a digital I2C interface. The NFC interface provides an additional option for contactless reading and writing via an NFC reader such as a smartphone equipped with an NFC radio. The device can communicate with a reader over a range of up to 1.5m.
Some parts in the N24RF series also include energy-harvesting capability: these devices can power themselves from the energy of the reader’s RF field during communication, which enables the implementation of batteryless designs.
The N24RF series is available in two package options: an SOIC-8 measuring 4mm x 5mm x 1.75mm, and a TSSOP-8, which is 3.1mm x 4.5mm x 1.2mm.
The N24RF’s data encoding function provides the designer with options for selecting the optimal data rate. For data transfer to the tag, ASK modulation is used at 1.65kbits/s or 26.48kbits/s data rates. From the tag, the N24RF implements load modulation using Manchester coding with 423kHz and 484kHz sub-carriers at a low (6.6kbits/s) or high (26kbits/s) data rate.
The N24RF also supports a 53kbits/s data rate with fast commands.