The EM4425 is a single-chip dual-frequency RFID tag IC from EM Microelectronics, integrating both HF (NFC, 13.56MHz) and UHF (RAIN/EPC Gen2v2, 860~960MHz) interfaces, with AES-128 encryption and digital signature support. One chip can be read both by smartphone NFC at close range and by UHF for long-range inventory — ideal for brand authentication and supply-chain traceability.
| Type | Dual-Frequency RFID (NFC+UHF) |
| HF Interface | 13.56MHz (ISO15693 / NFC Type 5) |
| UHF Interface | 860~960MHz (EPC Gen2v2) |
| Memory | 2Kbit HF + 512-bit UHF EEPROM |
| Security | AES-128, digital signature |
| Endurance | 100,000 cycles / 50-year retention |
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EM Microelectronics
Switzerland
Ultra-Low Power ICs — Semiconductor brand of the Swatch Group
View all EM Microelectronics products → Official EM Microelectronics siteThe EM4126 is a passive UHF RFID tag IC from EM Microelectronics compliant with ISO/IEC 18000-63 and EPC Class-1 Gen2, with 224-bit memory (16-bit PC + 208-bit EPC/UII), operating across the global 860~960MHz UHF band with ~−19dBm chip read sensitivity and EPC serialization (SGTIN) — for supply chain, retail item-level tagging, and asset management.
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