AS3953A Overview
The AS3953A NFC interface IC (NFiC) delivers low cost, ultra low 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.
AS3953A Key Features
- ISO 14443A pliant to Level-4
- NFCIP-1 target at 106 kb/s
- 1k bit EEPROM (108 bytes of user memory)
- Configurable wake-up interrupt (after tag is selected or using proprietary mand)
- Powered from external magnetic field with the possibility to draw up to 5mA
- 7 byte UID
- User configurable regulated voltage extracted from external magnetic field
- Bit rates from 106 Kbps till 848 Kbps
- Integrated resonant capacitor
- Integrated buffer capacitor
AS3953A 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
