ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3956 NFC Sensor Interface Tag IC

NFC to SPI/I²C Interface Tag IC

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AS3956 Dynamic NFC Sensor Tag IC meets industrial-grade quality standards and provides very high reliability in mission-critical applications and in end products with a long operating lifetime.

Thanks to a high sensitivity ISO14443A frontend and high integrated resonance capacitor, AS3956 offers standalone NFC passive tag functionality in a small form factor. The AS3956 dynamic tag acts as a contactless bridge between sensors and any NFC reader, such as a smartphone, through a host microcontroller.

Fast system integration and high speed data transfer are guaranteed by the available SPI and I²C interfaces and by optimized protocols (Tunneling mode and Extended mode), allowing bidirectional communication between the device microcontroller and an external NFC compliant device or ISO14443A reader device. AS3956 is able to operate fully powered by the RF field, without any external supply. This, combined with an advanced energy harvesting feature, greatly increases battery life time or even allows battery-less designs.  

Key Features

  • Fully compliant to NFC Forum Type 2/4 Tag, ISO14443A up to Level 4, EMVCo
  • Tunneling and Extended Modes with SPI and I²C for fast data transfer
  • 4kbit industrial grade EEPROM memory
  • Energy harvesting up to 5mA@4.5V
  • Available as bare die, thin WL-CSP (0.3mm height), MLPD-10

Key Benefits

  • Standalone NFC passive tag functionality
  • High endurance EEPROM memory reaches industrial grade quality
  • Allows battery-less designs
  • Fast system integration and high speed data transfer
  • No external component required

Product Facts

Frequency [MHz] 13.56
Protocol [ ] NFC Forum Type 2/4 Tag
ISO14443A up to Level 4
Supply voltage [ V] 1.65 to 5.5
Temperature range [°C] -40 to +125
Interface ISO14443A
SPI slave interface up to 5 Mbps
I²C slave interface up to 1 Mbps
EEPROM [kbits] 4
Features [ ] Type 2 Tag
Type 4 Tag emulation
Passive wake-up interrupt
32-bit password memory protection
Silent mode
Energy harvesting 5mA @ 4.5V
Data rate [ kbps] up to 106
Package [ ] MLPD-10, WL-CSP

Additional Information

  • Industrial and Internet of Things (IoT) applications exposed to harsh operating conditions and extreme temperatures ranging from -40°C to +125°C
  • Products requiring an extended operating lifetime, such as HVAC equipment, medical and healthcare devices, wireless sensors for civil infrastructure
  • Mission-critical products that require a zero failure rate
  • Feature and biometric payment cards