The EM4223 chip is used in UHF passive read-only transponder applications.
The EM4223 is a monolithic integrated‑circuit transponder for passive UHF RFID applications. It derives power from the RF field of a reader and returns a factory‑programmed code via backscatter modulation. Typical uses include supply‑chain management, asset control, licensing and auto‑tolling.
The datasheet provides electrical characteristics, timing parameters, command sets (ISO 18000‑6A mandatory and optional commands plus Fast Supertag commands), memory organization, and packaging details (SOT‑23 SP3B, tape‑and‑reel). It also lists absolute maximum ratings, handling procedures, and ordering information.
| Supply voltage (Vop) | 1.0 V – 3.5 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Input series impedance (900 MHz) | 0.620 pF |
| Modulation depth (typical) | 27 % – 100 % |
| User memory size | 128 bits |
| Package type | SOT‑23 (SP3B) tape & reel |
The device operates with a supply voltage between 1.0 V and 3.5 V.
It supports ISO 18000‑6A (type A) and the Fast Supertag (FST) protocol.
The standard package is SOT‑23 (SP3B) supplied in tape‑and‑reel of 3000 pieces.
The chip can operate from –40 °C up to +85 °C.