Serial EEPROMs from ST contain a unique 128-bit read-only ID for product recognition and tracking without requiring an extra component. Preprogrammed and permanently locked at the factory, the unique ID (UID) enables basic product identification and clone detection as an alternative to an entry-level secure element.
Initially available in 64-kbit and 128-kbit versions, the M24xxx-U series spans storage densities from 32 kbits to 2 Mbits. Each device retains its UID throughout the end-product lifecycle—from sourcing and manufacturing to deployment, maintenance, and disposal. The UID ensures seamless traceability, aiding reliability analysis and simplifying equipment repair.
These CMOS EEPROMs endure 4 million write cycles and retain data for 200 years. They operate from 1.7 V to 5.5 V and support 100-kHz, 400-kHz, and 1-MHz I2C bus speeds. The devices offer random and sequential read access, along with a write-protect feature for the entire memory array.
The 64-kbit M24C64-UFMN6TP is available now, priced from $0.13, while the 128-kbit M24128-UFMN6TP starts at $0.15 for orders of 10,000 units. Additional densities will be released during the second quarter of 2025.
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