Overview
The ST25DV02K-W1R8T3, produced by STMicroelectronics, is a dynamic NFC/RFID tag IC that combines NFC connectivity with Pulse Width Modulation (PWM) outputs. This device is part of the ST25DV-PWM series and is compliant with ISO/IEC 15693 and NFC Forum Type 5 standards. It features 2 Kbits of electrically erasable programmable memory (EEPROM) and up to two independent PWM outputs, making it a versatile solution for various industrial and consumer applications.
Key Specifications
| Specification | Details |
|---|---|
| Memory | 2 Kbits (256 bytes) of EEPROM, accessible in blocks of 4 bytes |
| PWM Outputs | Up to 2 independent PWM outputs (1 output for ST25DV02K-W1, 2 outputs for ST25DV02K-W2) |
| PWM Frequency | From 488 Hz to 31.25 kHz |
| PWM Resolution | From 9 bits at 31.25 kHz to 15 bits at 488 Hz, with 62.5 ns pulse width resolution |
| Power Supply | 1.8 V to 5.5 V |
| Temperature Range | -40 °C to +105 °C (PWM interface), -40 °C to +85 °C (contactless interface) |
| Package | SO8N and TSSOP8, ECOPACK2 (RoHS compliant) |
| Data Retention | 40 years |
| Write Cycles Endurance | 100,000 write cycles at 85 °C |
| Security | Up to four independent areas with flexible protection mechanism based on 32/64-bit passwords, TruST25 digital signature |
Key Features
- ISO/IEC 15693 and NFC Forum Type 5 tag contactless interface
- Live update of PWM parameters controlled by contactless interface
- No need for an external oscillator or MCU to drive the system
- Independent push-pull PWM outputs with adjustable output drive for low power and low noise applications
- TruST25 digital signature for authentication and data integrity
- Password-protected areas for enhanced security
- Extended temperature range and robust package options
- Compliant with Zhaga Book 24 & Book 25 standards for lighting solutions
Applications
The ST25DV02K-W1R8T3 is designed for a variety of industrial and consumer applications, including:
- Lighting control: particularly useful for LED driver applications where PWM is essential for dimming and color control.
- Motor control: setting power levels, speed, or rotor position in motors.
- Power supply units: managing power levels and efficiency.
- Other industrial applications: such as factory programming, track & trace, and general automation.
Q & A
- What is the memory capacity of the ST25DV02K-W1R8T3?
The device has 2 Kbits (256 bytes) of EEPROM memory, accessible in blocks of 4 bytes.
- How many PWM outputs does the ST25DV02K-W1R8T3 have?
The ST25DV02K-W1 has one PWM output, while the ST25DV02K-W2 has two independent PWM outputs.
- What is the frequency range of the PWM outputs?
The PWM outputs operate from 488 Hz to 31.25 kHz.
- What is the resolution of the PWM outputs?
The resolution ranges from 9 bits at 31.25 kHz to 15 bits at 488 Hz, with a 62.5 ns pulse width resolution.
- What is the power supply range for the ST25DV02K-W1R8T3?
The device operates with a power supply voltage from 1.8 V to 5.5 V.
- What is the temperature range for the ST25DV02K-W1R8T3?
The device operates from -40 °C to +105 °C for the PWM interface and from -40 °C to +85 °C for the contactless interface.
- What security features does the ST25DV02K-W1R8T3 offer?
The device includes up to four independent areas with flexible protection mechanisms based on 32/64-bit passwords and the TruST25 digital signature for authentication.
- Does the ST25DV02K-W1R8T3 require an external oscillator or MCU?
No, the device does not require an external oscillator or MCU to operate.
- What are the package options for the ST25DV02K-W1R8T3?
The device is available in SO8N and TSSOP8 packages, both of which are ECOPACK2 (RoHS compliant).
- What is the data retention period for the ST25DV02K-W1R8T3?
The device has a data retention period of 40 years.
- How many write cycles can the ST25DV02K-W1R8T3 endure?
The device can endure 100,000 write cycles at 85 °C.
