The M24LR04E-R is a Dynamic NFC/RFID tag IC with dual-interface (I²C bus and ISO 15693 RF) and 4-Kbit of electrically erasable programmable memory (EEPROM). This IC is organized as 512 x 8 bits in the I2C mode and as 128 x 32 bits in RF mode. It can be operated from a single supply voltage of 1.8 V to 5.5 V. The RFID tag IC also features an energy harvesting analog output, as well as a user-configurable digital output pin toggling during either RF write in progress or RF busy mode.