The EM4423 is a single-chip dual-frequency RFID tag IC from EM Microelectronics combining NFC (HF) and RAIN (UHF) — branded "RAINFC". The HF side is NFC Forum Type 2 compliant and the UHF side is EPC Gen2v2 compliant, with a 96-bit inalterable unique ID — widely used for retail item tagging, consumer engagement, and anti-counterfeiting.
| Type | Dual-Frequency RFID (NFC+UHF) |
| HF Interface | 13.56MHz (NFC Forum Type 2) |
| UHF Interface | 860~960MHz (EPC Gen2v2) |
| Memory | 128-bit EPC + 160-bit USER |
| Unique ID | 96-bit TID |
| Security | 32-bit kill / access passwords |
EM Microelectronics
Switzerland
Ultra-Low Power ICs — Semiconductor brand of the Swatch Group
View all EM Microelectronics products → Official EM Microelectronics siteThe EM6819 is an ultra-low power 8-bit RISC microcontroller from EM Microelectronics. Built on CMOS process, it operates down to 0.9V and achieves nA-level sleep current. Features integrated LCD driver, timers, ADC, and rich peripherals — ideal for battery-powered consumer electronics and smart card applications.
The EM9301 is a single-mode Bluetooth 4.0 Low Energy (BLE) controller IC designed for ultra-low power applications. It communicates with the host MCU via SPI, integrates the RF front-end and baseband, and provides a complete BLE link layer — ideal for wearables, sensors, and beacons requiring extremely low operating current.
EM4305 is a 125kHz low-frequency RFID read/write transponder IC powered by the inductive coil. Supports ASK/FSK/PSK modulation with 512-bit EEPROM — widely used in access control cards, employee ID cards, animal identification, and industrial tracking.
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