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STMicro ships RF tagging solution

Posted: 16 Oct 2002 ?? ?Print Version ?Bookmark and Share

Keywords:srix4k? crx14? rf reader? rf tagging? electronic identification system?

STMicroelectronics has introduced a pair of devices that can be used to build low-cost, short-range RF tagging and identification systems such as those used in identifying electronic consumables and access control.

The CRX14 RF reader IC and the SRIX4K short-range contactless memory are suitable for use over short-distances and feature an "anti-collision" mechanism that allows them to operate even with the presence of various tags within the reader's range. The chips also have an "anti-clone" function, developed at France Telecom, which allows a tag to be authenticated.

The short-range contactless reader conforms to the ISO14443 type B standard and is controlled via a two-wire I?C bus. It generates a signal on an external antenna that provides power and transmits data to an RF tag.

The received data are captured by the tag, which is powered by the energy transmitted by the reader. The CRX14 is packaged in a SO16N casing and is designed to be connected to a digital host that manages all the communications protocol in both directions through the I?C serial bus.

Manufactured using the company's SMOS technology, the SRIX4K is a contactless memory that includes 4,096 bits of non-volatile memory and is organized in three areas: a resettable OTP where bits can only be switched from 1 to 0, two 32-bit binary counters, and the main non-volatile memory, which is accessible in 32-bit blocks.

The memory device is claimed to allow at least 1 million program-erase/write cycles and retain data for at least 10 years.





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