EM4425
The EM Microelectronic EM4425 is an Dual-Frequency RFID tag IC, with 2048-bit configurable non-volatile memory (HF USER memory, up to 480-bit EPC/UII encodings, UHF USER memory, optional Digital Signature: none/256b/384b/512b), 64-bit UID (HF), 96-bit TID (UHF), operating at 13.56 MHz (HF/NFC) and 860-960 MHz (UHF) / 125 kHz LF, under ISO/IEC 15693, ISO/IEC 18000-3 Mode 1, NFC Forum Type 5 Tag, ISO/IEC 18000-63, EPC Gen2v2 ISO/IEC 29167-10.
HF ISO 15693 + UHF ISO 18000-6C, 2Kbit EEPROM
Full Specifications
| Manufacturer | EM Microelectronic |
|---|---|
| Frequency Category | Dual-Frequency |
| Frequency | 13.56 MHz (HF/NFC) and 860-960 MHz (UHF) / 125 kHz LF |
| Protocol | ISO/IEC 15693, ISO/IEC 18000-3 Mode 1, NFC Forum Type 5 Tag, ISO/IEC 18000-63, EPC Gen2v2, ISO/IEC 29167-10 |
| Memory | 2048-bit configurable non-volatile memory (HF USER memory, up to 480-bit EPC/UII encodings, UHF USER memory, optional Digital Signature: none/256b/384b/512b), 64-bit UID (HF), 96-bit TID (UHF) |
| Interface | RF (contactless) - dual frequency HF/NFC and UHF air interfaces, optional tamper loop inputs/outputs |
| Temperature Range | -40°C to +85°C |
| Form Factor | Sawn wafer, 6-mil (152µm) thickness, gold bumps + polyimide, die size 1117.0 µm × 797 µm |
| Security | AES-128 crypto for NFC web-based authentication, Digital signature for authenticity, ISO 29167-10 (AES), Password-protected memory, Random ID option, Tamper Detection with alarm |
Engineering Brief
The EM4425 em|echo-V is a dual-frequency RFID/NFC transponder combining HF (13.56 MHz) and UHF (860-960 MHz) on a single die with shared 2048-bit configurable memory and common IC serial number. It supports ISO 15693, NFC Type 5, and EPC Gen2v2 protocols with read sensitivity up to -20dBm (UHF) and write sensitivity up to -14.5dBm. Features include AES-128 cryptography, digital signature authentication, tamper detection, 50pF on-chip resonant capacitor, minimum 100k write cycles endurance, and 50-year data retention, targeted at retail, product authentication, and supply chain applications.
Typical Applications
Standards & Compliance
Frequently Asked Questions
What frequencies does the EM4425 support?
The EM4425 is a dual-frequency chip supporting both HF at 13.56 MHz (ISO 15693, NFC Type 5) and UHF at 860-960 MHz (EPC Gen2v2) on a single die with shared memory.
How much memory does the EM4425 have?
The EM4425 contains 2048 bits of configurable non-volatile EEPROM memory, supporting up to 480-bit EPC/UII encodings for UHF and separate HF user memory areas, plus a 64-bit UID and 96-bit TID.
Does the EM4425 support AES encryption?
Yes, the EM4425 features AES-128 cryptography for NFC web-based authentication and supports ISO 29167-10 authentication protocol, plus digital signature options (256/384/512-bit) for product authenticity verification.
What is the read range sensitivity of the EM4425?
The EM4425 achieves read sensitivity up to -20 dBm on the UHF interface and write sensitivity up to -14.5 dBm, enabling flexible read ranges depending on antenna design and reader power.
Does the EM4425 have tamper detection features?
Yes, the EM4425 includes tamper detection capabilities with optional tamper loop inputs/outputs and alarm functionality to detect physical tampering or unauthorized access attempts.
What is the data retention and endurance of the EM4425?
The EM4425 offers a minimum of 100,000 write cycles endurance and 50-year data retention, making it suitable for long-term tracking and authentication applications.
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