Overview
The ST25R3915-AQFT is a highly integrated NFC initiator and HF reader IC designed specifically for automotive applications. It is AEC-Q100 grade 1 qualified, ensuring high reliability and performance in harsh automotive environments. This component includes an analog front end (AFE) and a highly integrated data framing system, supporting various NFC and RFID standards such as ISO 18092 (NFCIP-1), ISO 14443A and B, ISO 15693, and FeliCa™. The device is optimized for low power consumption and features advanced technologies like automatic antenna tuning and low power detection of card presence.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Min (Volt) | 2.4 |
| Supply Voltage Max (Volt) | 5.5 |
| Operating Temp Min (Celsius) | -40.0 |
| Operating Temp Max (Celsius) | 125.0 |
| ECCN US | EAR99 |
| ECCN EU | NEC |
| Packing Type | Tape And Reel |
| Package Name | VFQFPN 5X5 32L PAD 3.5X3 PUNCHED |
| Output Power | Up to 1 W (differential output) |
| SPI Interface | 6 Mbit/s with 96 bytes FIFO |
Key Features
- AEC-Q100 grade 1 qualified for automotive applications
- Supports ISO 18092 (NFCIP-1) initiator and active target, ISO 14443A and B, ISO 15693, and FeliCa™
- High bit rate (HBR) support up to 848 kbit/s for PICC to PCD and PCD to PICC framing
- Capacitive sensing for wake-up and low power detection of card presence
- Automatic antenna tuning system (ST25R3914 only)
- Automatic modulation index adjustment
- AM and PM demodulator channels with automatic selection
- User selectable and automatic gain control
- Transparent and Stream modes for implementing MIFARE™ Classic and other custom protocols
- Possibility of driving two antennas in single-ended mode
- Oscillator input capable of operating with 13.56 or 27.12 MHz crystal with fast start-up
Applications
The ST25R3915-AQFT is primarily designed for automotive applications, where it can be used in various NFC and RFID systems. These include:
- Vehicle access and immobilizer systems
- Automotive infotainment and navigation systems
- Smart car keys and keyless entry systems
- Automotive payment and ticketing systems
- Other automotive applications requiring high-performance NFC and RFID capabilities
Q & A
- What is the primary application of the ST25R3915-AQFT?
The ST25R3915-AQFT is primarily designed for automotive applications, including vehicle access, infotainment, and payment systems.
- What NFC and RFID standards does the ST25R3915-AQFT support?
The device supports ISO 18092 (NFCIP-1), ISO 14443A and B, ISO 15693, and FeliCa™.
- What is the output power of the ST25R3915-AQFT?
The device can output up to 1 W in differential mode.
- What is the operating temperature range of the ST25R3915-AQFT?
The operating temperature range is from -40°C to 125°C.
- Does the ST25R3915-AQFT support high bit rates?
Yes, it supports high bit rates up to 848 kbit/s for PICC to PCD and PCD to PICC framing.
- How does the ST25R3915-AQFT detect card presence?
The device uses capacitive sensing, phase, and amplitude measurements to detect card presence in low power mode.
- What is the package type of the ST25R3915-AQFT?
The package type is VFQFPN 5X5 32L PAD 3.5X3 PUNCHED.
- Is the ST25R3915-AQFT AEC-Q100 qualified?
Yes, it is AEC-Q100 grade 1 qualified for automotive applications.
- What is the SPI interface speed of the ST25R3915-AQFT?
The SPI interface operates at 6 Mbit/s with a 96-byte FIFO.
- Can the ST25R3915-AQFT drive two antennas in single-ended mode?
Yes, it can drive two antennas in single-ended mode.
