AMS ships NFC interface chip for electronic devices

Chip maker AMS has announced full availability of a new NFC chip which is designed to be integrated into a wide range of electronic devices to enable them to interact with NFC phones.


The AS3953, says AMS, can reduce the cost of adding NFC functionality to devices like medical monitoring equipment, electronic shelf labels and home appliances to less than a third of the price of using a traditional NFC reader interface chip — as well as offering simpler implementation.

The chip can be powered by the NFC device used to communicate with it, and can wake the host device if appropriate. This makes the AS3953 ideal for incorporating in low-power battery powered devices, says AMS.

“The AS3953 connects on one side to an antenna to transmit/receive information via 13.56MHz to any NFC enabled mobile phone. On the other side it has a standard SPI interface which can connect to any microcontroller,” explains Mark Dickson, AMS’s senior product manager for RFID power and wireless.

“If the NFC field of the mobile phone gets in the proximity of the antenna, the AS3953 starts up and will wake up the microcontroller via an interrupt. At the same time the AS3953 harvests power from the field providing this energy to the microcontroller and system,” he adds. “At this stage the NFC phone can communicate with the microcontroller via the AS3953.”

A video produced by AMS shows the AS3953 in use as part of a passive device with a changeable e-ink display:

The AS3953 is available now and is priced at US$1.59 each for 1,000 units in MLPD format, $1.09 as WL-CSP and $0.99 as a bare die.

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