AS3953 ISO 14443A Sensor Interface Tag
ISO 14443A to SPI Interface Tag IC
Features
- Direct NFC to SPI interface
- 5mA energy harvest
- 106 to 848kbit/s data transfer rate
- Built-in 1kbit high endurance EEPROM (>1Mu write cycles)
Benefits
- 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

Tools
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 |
Notifications
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 |