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RF/Microwave??

EM Micro RFID ICs support contactless ID systems

Posted: 15 Jun 2004 ?? ?Print Version ?Bookmark and Share

Keywords:em microelectronic? rfid ic? em4035? em4135? em4034?

EM Microelectronic, the electronic systems company of the Swatch Group, has released a family of RFID ICs that operate at 13.56MHz for contactless identification systems.

"In parallel with 125kHz RFID ICs, these circuits are used in applications that require crypto and secured access, such as security and access control, time and attendance tracking and asset management," explained Mougahed Darwish, president of the management board of EM Microelectronic. "The 13.56MHz RFID ICs can typically read 20 to 40 tags per second."

The RFID IC family includes the EM4035, EM4135, EM4034 and EM4094.

The EM4035 includes an ISO18000-3 mode 1 compliant crypto-algorithm with 96-bit secret key for symmetrical challenge/response. It is designed for multiapplications such as access control and ticketing, and features a 3.2Kb EEPROM organized as 50 words of 64 bits, with each word capable of being irreversibly locked. The on-chip memory contains a 64-bit Unique Identifier (UID), with a 6-bit chip type identifier and a 10-bit code that can be custom-programmed per customer request.

The EM4135 and EM4034 are identical to the EM4035 except that they do not include CRYPTO and are suitable for very low-cost logistics and tracking applications. Both the EM4135 and EM4034 ICs contain 2.3Kb and 448 bit of R/W user memory, respectively. Engineered for ultra-dense and low-cost designs, the EM4135 and EM4034 have bonding pads that are optimized for flip-chip assembly and have a -40C to 85C operating temperature range. Moreover, the EM4034/35 and EM4135 are completely self-contained, require no external capacitors, and derive their power from the RF energy supplied by a single antenna connection.

The EM4094 is a universal RFID reader IC that is compatible with virtually all 13.56MHz RFID tags, including ISO15693 and ISO14443A&B, as well as proprietary protocols. Requiring minimal external components and a serial 3-wire microcontroller interface, the EM4094 provides up to 200mW of OOK or ASK modulation output from a single 5V supply. The IC also has AM/PM demodulation with AGC signal amplifier, multiple sub-carrier capability of 212kHz, 424kHz and 848kHz, and is compatible with Manchester or BPSK sub-carrier coding. The programmable device features built-in 400kHz/1MHz low-pass and 100/200/300kHz high-pass filters, selectable receiver gain and power-down mode. Multiple receiver inputs are provided for redundant/diversity antenna arrangements to achieve enhanced communications reliability.

The EM4035/34 and EM4135 are available as sawn wafer, with or without bumps, while the EM4094 is offered in SO20 or SO16 packaging in stick or in tape and reel.





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