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How the compatible EM4233 / Skidata (ISO 15693) works
The EM4233 / Skidata (ISO 15693) is a 13.56 MHz high-frequency contactless credential read over the ISO/IEC 14443 air interface. Its data structure is ISO 15693; 8-byte UID; ~52 blocks (Skidata variant, IC ID 0x09); password/EAS + proprietary Skidata commands. When you present a credential, the reader decodes that exact structure and passes it to your access-control panel as a card number it recognises.
As a programmable blank, the EM4233 / Skidata (ISO 15693) is the raw material the rest of the catalogue is built on. We supply it factory-fresh and rewritable on the 13.56 MHz smart card (ISO/IEC 14443-A) platform, so you — or we — can encode it to emulate the proximity format your readers expect. It is the backbone of every 125 kHz compatible credential we ship.
The EM Microelectronic; Skidata format sits among the specialist proximity credentials most card vendors never tooled up to produce — which is why the only other source is usually the original manufacturer, at a steep premium. Supporting these hard-to-find formats is exactly what Security ID Systems specialises in. Tell us the format printed on your card, or send a sample for us to read, and we confirm compatibility before you order.
Also known as
EM4233 · EM4233 SLIC · Skidata keycard · ISO15693 EM-Marin · Skidata ski pass
EM Microelectronic; Skidata and all other brand and product names are trademarks of their respective owners. Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, sponsored by, or endorsed by these companies. Brand and format names are used only to identify the systems our products are compatible with.