STMicroelectronics’ ST25DV02K-W1/W2 series of dynamic NFC/RFID tags are ISO/IEC 15693 NFC Forum type 5 devices with pulse width modulation (PWM) outputs controlled by contactless interface. They support all ISO/IEC 15693 modulations, coding, sub-carrier modes, and data rates. This series of ICs offers a 13.56 MHz long-range interface compatible with NFC phones and readers. The PWM output can be programmed independently and securely, allowing a large field of application. The IC provides a live update of PWM parameters by contactless interface, extending the user experience. ST25DV02K-W1 offers one PWM output while ST25DV02K-W2 offers two PWM outputs. The devices offer data protection of up to four independent areas, including the PWM control area, with flexible protection mechanism based on 32-/64-bit passwords.
Features
- PWM outputs
- Up to 2x independent outputs (1x with ST25DV02K-W1; 2x with ST25DV02K-W2)
- From 488 Hz to 31,250 Hz
- 62.5 ns pulse width resolution (from 15-bit resolution at 488 Hz to 9-bit resolution at 31.25 kHz)
- Accuracy: ±10% overtemperature range
- No need for external oscillator
- Supply voltage from 1.8 V to 5.5 V, independent from contactless interface
- Independent push-pull outputs (up to 4 mA drive capability per output; adjustable output drive for low power and low noise application)
- Live update of PWM parameters controlled by contactless interface
- Contactless interface
- Based on ISO/IEC 15693 and NFC Forum type 5 tag
- Supports all ISO/IEC 15693 modulations, coding, sub-carrier modes, and data rates
- Single and multiple blocks read
- Internal tuning capacitance: 28.5 pF
- Memory
- 2-kbits of EEPROM
- Accessible in blocks of 4x bytes
- 5 ms typical write time (one block)
- Data retention: 40 years
- Write cycles endurance: 100k write cycles at 85°C
- Data protection
- Up to 4 independent areas, including the PWM control area, with flexible protection mechanism based on 32-/64-bits passwords
- System configuration: write protection by 32-bit password
- TruST25™ digital signature mechanism for authentication
- Temperature range:
- Contactless interface: -40°C to +85°C
- PWM interface: -40°C to +105°C
- Package
- 8-pin packages
- ECOPACK2® (RoHS compliant)
