EM4423
The EM Microelectronic EM4423 is an Dual-Frequency RFID tag IC, with 1920-bit (240 bytes) NFC user memory; 128-bit or 224-bit EPC; 160-bit or 64-bit USER memory; 96-bit TID; 32-bit Access/Kill passwords, operating at 13.56 MHz (HF/NFC) and 860-960 MHz (UHF) / 125 kHz LF, under ISO/IEC 14443 Type A, NFC Forum Type 2, ISO/IEC 18000-63 EPC Gen2 V2.
Dual-frequency NFC + UHF RAIN RFID tag IC
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 14443 Type A, NFC Forum Type 2, ISO/IEC 18000-63, EPC Gen2 V2 |
| Memory | 1920-bit (240 bytes) NFC user memory; 128-bit or 224-bit EPC; 160-bit or 64-bit USER memory; 96-bit TID; 32-bit Access/Kill passwords |
| Interface | RF (contactless dual-frequency: HF 13.56 MHz, UHF 860-960 MHz) |
| Temperature Range | -40°C to +85°C |
| Form Factor | Sawn wafer, 3/6-mil thickness, gold bumps, die size 853 × 790 μm |
| Security | 32-bit Access password, 32-bit Kill password, 4-byte and 2-byte LOGIN passwords, optional security timeout, PACK authentication, 32-byte digital signature support, anti-tearing protection, privacy mode |
Engineering Brief
The EM4423 em|echo is a dual-frequency transponder IC combining NFC (13.56 MHz) and UHF RAIN RFID (860-960 MHz) on a single die with a common 96-bit unique identifier shared across both interfaces. It offers configurable memory architectures (128-bit or 224-bit EPC encodings), 1920-bit NFC user memory, and comprehensive privacy features including Untraceable command support and password-protected access. The chip provides minimum 100k write cycles, 10-year data retention, read sensitivity up to -18 dBm (UHF) and -16 dBm typical at IC level, with anti-tearing protection, ACCESS counter, and field detection capabilities across both RF interfaces for retail, authentication, and smart marketing applications.
Typical Applications
Standards & Compliance
Frequently Asked Questions
What frequencies does the EM4423 support?
The EM4423 is a dual-frequency tag IC operating at both 13.56 MHz (HF/NFC) and 860-960 MHz (UHF RAIN RFID) with a shared 96-bit unique identifier accessible from either interface.
How much memory does the EM4423 have?
The EM4423 provides 1920-bit (240 bytes) NFC user memory, configurable EPC memory (128-bit or 224-bit), USER memory (160-bit or 64-bit on UHF), and a 96-bit TID shared across both frequencies.
What NFC protocols does the EM4423 support?
The EM4423 supports ISO/IEC 14443 Type A and NFC Forum Type 2 on the 13.56 MHz interface, plus ISO/IEC 18000-63 (EPC Gen2 V2) on the UHF 860-960 MHz interface.
What security features does the EM4423 offer?
The EM4423 includes 32-bit Access and Kill passwords, 4-byte and 2-byte LOGIN passwords, PACK authentication, 32-byte digital signature support, Untraceable privacy mode, anti-tearing protection, and optional security timeout.
What is the read sensitivity of the EM4423?
The EM4423 achieves read sensitivity up to -18 dBm on the UHF interface and -16 dBm typical at IC level on the NFC interface, enabling extended read range on both frequencies.
How many write cycles does the EM4423 support?
The EM4423 supports a minimum of 100,000 write cycles with 10-year data retention, making it suitable for applications requiring frequent memory updates.
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