Product Description

NFC forum type 2 tag IC with RF/Tampering Detection (RFD/TD) – SIC43NT

The SIC43NT is a NFC Forum Type 2 Tag IC with an RF detection/ Tampering (RFD/TD) pin which can be configured to be the RF field detection output pin or the Tampering detection input pin.
n the first purpose, the RF detection pin can be configured to generate the wake-up output to the MCU to waking up the system from sleep state. This function can be used in many applications such as Bluetooth pairing, WIFI setting, or wireless authentication. The On-chip memory is enough to store necessary pairing information for electronic devices and embedded systems. To serve the different designs, the RF detection pin also can be set to:

(1) 1.8V output voltage mode, in which the RFD pin connected directly to the I/O; or

(2) open-drain mode, in which the logic can be translated to MCU VDD level.

Moreover, the RFD pin can be configured to operate in tamper evidence detection mode where a tear able conductor normally connects between the RF detection pin and the tag’s ground pin. This mode is designed for anti-tampering applications. A RFID/NFC device can monitor the status of the pin via special commands to check whether the conductor has been cut or still be in a safety state.

The SIC43NT NDEF response can be configured to be the tampering detection, including Dynamic NDEF data, which contains tamper status of the tag and a rolling code. These two data will be mirrored into the NDEF message at the position corresponding to the dynamic data pointer set by users.

  • The tamper status indicates whether the tag’s RFD pin (in tamper evidence detector mode) has been disconnected or not.
  • The rolling code is a one-time generated data that can be used to check authenticity of the tag. It is generated by a secure cipher module with an 80-bit key.

In addition, the tag can be configured to mirror these dynamic data in NDEF message only when a certain condition is met: either mirror data only when the tag is not tampered, or mirror only after the tag has been tampered.

Highlight Features

  • NFC forum type 2 tag
  • A configurable pin for three modes of operation:
    • RF field detection
    • Tamper evidence detection
    • Sleep mode
  • Dynamic NDEF message
  • contains UID, tamper evidence message, and rolling code
  • mirrored into original NDEF message
  • can be triggered by tamper status of the tag
  • Password protection
  • Tag authenticity verification using rolling code (optional)
  • Secured tamper status decoding to prevent message counterfeiting (optional)

Demo Video

Interfaces and Peripherals

  • RF interface based on ISO14443A, 106 kbps data rate
  • True anti-collision
  • Configurable output type in RF detection mode
    • Open – Drain Mode
    • 1.8V – Output Mode
  • On-chip capacitance 50 pF Memory
  • Factory programmed 7-byte UID
  • Lock bytes with anti-tearing protection
  • 144-byte user memory
  • Dedicated memory for configuration functions: Password authentication, Pin configuration, and Rolling code configuration
  • Dedicated memory for timestamp and tamper status
  • EEPROM organization enabling NDEF TLV messages
  • EEPROM erase/write cycle up to 500,000 times
  • EEPROM memory retention up to 10 years

Operating Conditions

  • 13.56MHz operating radio frequency
  • Operating temperature from -40°C to 85°C


  • Die-On-Wafer with Au-Bump Supplementary
  • Wafer map – XML, TXT, SECSII
  • UID summary


  • Wafer map-XML, TXT, SECSII
  • UID summary


Anti-Counterfeiting Concept


  • Anti-tampering sticker and label
  • Smart packaging
  • Vouchers and coupons
  • Product authentication
  • NFC-wakeup devices and appliances
  • Bluetooth and Wi-Fi pairing
  • Toys
SIC43NT,S1 and ASIC design