Read-Only RFID chip with Anticollision (EM4025)
The EM4025 is a CMOS IC for use in RFID transponders offering Unique Identification Codes; the Unique Identifications Code (UID) is programmed during production using laser-fusing technology. Based on a Reader-Talk-First principle (RTF), the chip starts at power up in a quiet mode waiting for arbitration command from the base station. Using a data rate of 2kbit/s or 4kbit/s together with a fast mode binary tree search anti-collision principle, tag identification speeds up to 30tag/s are achievable. Tag to reader data is Manchester encoded. Only an external coil is needed to build a transponder, as a parallel resonant capacitor of 78pF is integrated in the chip.
Such a device will enable very low-cost label solutions for industrial logistic applications, automatic inventory, item management, etc.
The communication protocol is defined in a way that only a reader software upgrade will be needed to make EM4025 reader compliant with the under construction ISO18000-2 ISO/IEC standard.