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AS3953 ISO 14443A Sensor Interface Tag

ISO 14443A to SPI Interface Tag IC


  • Direct NFC to SPI interface
  • 5mA energy harvest
  • 106 to 848kbit/s data transfer rate
  • Built-in 1kbit high endurance EEPROM (>1Mu write cycles)


  • Most cost efficient and easiest way to implement NFC
  • Power positive, longer battery lifetime, allows batteryless designs
  • Fast data transfer for firmware upgrades or data intense applications
  • Longest lifetime of EEPROM even in challenging environments

Product parameters

Frequency [MHz] 13.56
Protocol ISO 14443A NFCIP-1 target at 106kbps NFC Forum T4T emulation
Supply Voltage [V] RF field or ext. 1.65 to 3.6
Temperature Range [°C] -40 to +85
Interface ISO14443A \ 4-wire SPI (slave) up to 5MHz
EEPROM [kbit] 1
Features Passive wake-up interrupt Energy harvesting 5mA @ 3.3V
Data Rate [kbit/s] Up to 848
Package Die, MLPD-10, WL-CSP

General description

The AS3953 NFiC™ enables all applications to interact with an NFC mobile phone in an instant. It is a fast NFC to SPI interface capable of harvesting field energy up to 5mA.

Not Recommended for New Designs
ams-OSRAM AG is discontinuing production of this device. Final lifetime buy order must be placed by October 29, 2021. Please contact your local sales representative for further information.

This product suits for the following applications:

  • Passive wake-up
  • Product initialization, service and maintenance
  • Multipurpose HF interface to a controller
  • ISO 14443A Smart Cards
  • Low power or passive programming
  • NFC Forum Tag Type 4
  • Ultra low power data logger
  • Passive wake up
  • RFID programmable configuration EEPROM
  • Remote sensors
  • ISO 14443A smart card
  • BT/BLE/Wi-Fi pairing
  • NFC Forum Tag Type 4
  • Low power data transfer
  • Bluetooth and Wi-Fi pairing


Title Category Headline Buy
AS3953DemoKitNFiC Application Board Demo Kit NFiC for AS3953
AS3953DemoKitTags Application Board Demo Kit Tags for AS3953

Technical documents

Type Description Language
Datasheet Document version 1-05; AS3953A English
Datasheet Document version 1-04; AS3953B English
Product Brief Product overview AS3953 English

Environmental documents

Type Description Language
Material Declaration Form MDF_190950009_AS3953A-BDFT English
Material Declaration Form MDF_190950009_AS3953A-BDFM English


Type Description Language
EoL Notification AS1xxx, AS25xx, AS3xxx, AS73211, AS89020, SL900A, TMD4704 (issued 2020-Dec) English
EoL Notification AS3953 (Issued 08-April-2021) English

Other information

Type Description Language
Block Diagram AS3953 Block Diagram English
Factsheet The Missing Link English
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