AS3953A 14443 High Speed Passive Tag Interface The AS3953A NFC interface IC (NFiC) delivers low cost, ultra low General Description power NFC Forum functionality to multiple different applications. The AS3953A is a analog front-end with integrated 14443A data framing and SPI interface. It is designed to create a fast data link between an ISO 14443A reader device (PCD) and a microcontroller. The AS3953A is passively powered meaning that it can be supplied from the PCD magnetic field, eliminating the need of a continual external supply. This makes the AS3953A perfect for wireless communication to a low-power battery powered device. The AS3953A is used with an appropriate antenna coil connected to the terminals LC1 and LC2, and behaves as a normal passive ISO 144443A tag (PICC). After the anti-collision protocol is passed, the PCD sends a Wake-Up command, which wakes up the microcontroller by sending an interrupt. From this point onwards, the AS3953A serves as a data link between the microcontroller and the PCD. AS3953A can also operate as NFCIP-1 target at 106 kbit/s. The AS3953A includes an onboard EEPROM that can be accessed either from the PCD or from the microcontroller via the SPI interface. This built-in flexibility makes it ideal for two types of applications: Where personalization data is programmed by the PCD (even in case the SPI side is not powered) and it is later read by microcontroller through SPI interface. Where log data is stored periodically by the microcontroller and can then be read by the PCD even when the microcontroller is not powered. A regulated power supply voltage extracted from the PCD field is also available on a pin and can be used as power supply for external circuitry. For example, an external microcontroller and a sensor could be powered from the PCD field combined with pass through data rates up to 848kbit/s, which means the AS3953A is ideal for contactless passive programming of MCU systems. The AS3953A can also operate as a stand-alone ISO 14443A tag. The AS3953A supports ISO 14443A up to Level-4, meaning a contactless smart card or an NFC forum compatible tag (Tag Type 4) can be built. Having a NFC Forum compatible tag inter face allows the AS3953A to be used in an application where a standard NFC enabled phone is used as a PCD. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v1-04 2015-Dec-28 Document FeedbackAS3 953 A Gen e ra l De s c rip t ion Key Benefits & Features The benefits and features of AS3953A, 14443 High Speed Passive Tag Interface are listed below: Figure 1: Added Value of Using AS3953A Benefits Features NFC Forum compliance for full ISO 14443A compliant to Level-4 interoperability ECMA-340 / ISO/IEC 18092 compliance NFCIP-1 target at 106 kbit/s Internal user memory for standalone 1k bit EEPROM (108 bytes of user memory) application Configurable wake-up interrupt (after tag is selected or Allows zero-power standby using proprietary command) Enables long battery life time, or Powered from external magnetic field with the possibility to battery-less designs draw up to 5mA User configurable regulated voltage extracted from external Allows supply of external circuitry magnetic field Data rate transmission up to the Bit rates from 106 kbit/s till 848 kbit/s maximum allowed by ISO 14443A 7 byte UID compliance Easy and fast antenna design and Integrated resonant capacitor impedance matching Guarantees no reset during reader (PCD) Integrated buffer capacitor modulation Design flexibility, easy integration. Fits requirements for various embedded 4-wire Serial Peripheral Interface (SPI) with 32 byte FIFO applications and manage of external microcontroller Fits supply requirements for various Wide SPI power supply range (1.65V to 3.6V) applications, including industrial Flexibility for wide range of applications Wide temperature range: -40C to 85C Small outline, compatibility to common Available as WLCSP 10-bumps, 10-pin MLPD (3x3mm) and inlay and card manufacturing lines, Gold bumped dies surface-mount assembly Page 2 ams Datasheet Document Feedback v1-04 2015-Dec-28