The MAX66140 combines 1024 bits of user EEPROM with secure hash algorithm (SHA-1) challenge-and- response authentication (ISO/IEC 10118-3 SHA-1), a 64-bit unique identifier (UID), one 64-bit secret, and a 13.56MHz ISO 15693 RF interface in a single chip. It provides secure, symmetric authentication for both reading and writing to the device and supports various features defined by ISO 15693 such as data rates, modulation indices, subcarrier modes, selected state, application family identifier (AFI), data storage format identifier (DSFID), and the Option_flag bit for read operations.
The MAX66140 combines a 1024‑bit user EEPROM, a 512‑bit SHA‑1 engine, a 64‑bit unique identifier and a 13.56 MHz ISO 15693 RF interface in a single chip. Memory is organized into four 256‑bit pages with write‑cycle counters and optional EPROM‑emulation protection.
The device supports all ISO 15693 data rates, modulation schemes and command sets, providing mutual authentication, block‑lock features and up to 200 k write/erase cycles with a 40‑year data retention guarantee.
| Operating Temperature Range | -25 °C to +50 °C |
|---|---|
| Write‑Cycle Endurance | 200,000 cycles (at +25 °C) |
| Data Retention | 40 years |
| Write Field Strength (K version) | 122.4 dBµA/m |
The device operates from –25 °C to +50 °C.
The EEPROM is rated for 200,000 write/erase cycles at +25 °C.
Data is retained for at least 40 years.