آر اف (فرکانس رادیویی) و بی‌سیم آی‌سی آر‌اف‌آی‌دی و کنترل دسترسی

Product Attributes

Introduction

The TRF7964A is an integrated AFE and multi-protocol data framing device for 13.56 MHz NFC/RFID reader systems, supporting ISO/IEC 14443 A and B, Sony FeliCa, and ISO/IEC 15693. It offers pin-to-pin and firmware compatibility with the superset device TRF7970A. The device features built-in programmable options, making it suitable for a wide range of proximity and vicinity identification applications. The device is configured by selecting the desired protocol in the control registers. Direct access to all control registers allows fine-tuning of various reader parameters as needed. The TRF7964A handles all framing and synchronization tasks for on-board ISO protocols, supporting data rates up to 848 kbps. Other standard or custom protocols can be implemented using one of the direct modes provided by the device. These direct modes give users full control over the AFE, with access to raw subcarrier data or unframed but ISO-formatted data along with the associated (extracted) clock signals. The receiver system features a dual-input receiver architecture for maximum communication reliability. The receiver also includes multiple automatic and manual gain control options. Signal strength received from transponders, ambient sources, or internal levels is available in the RSSI register. Communication between the MCU and the TRF7964A can be performed via SPI or parallel interface. When using the built-in hardware encoder and decoder, transmit and receive functions use a 127-byte FIFO register. For direct transmit or receive functions, since the encoder or decoder can be bypassed, the MCU can process data in real time. The TRF7964A supports a wide supply voltage range of 2.7 V to 5.5 V and data communication levels of 1.8 V to 5.5 V for MCU I/O interfaces. When operating from a 5 V supply, the transmitter offers selectable output power levels equivalent to 100 mW (+20 dBm) or 200 mW (+23 dBm) into a 50 Ω load, with support for OOK and ASK modulation with selectable modulation depth. The built-in programmable auxiliary regulator supplies up to 20 mA of power for the MCU and other external circuits within the reader system.

Features

• Fully integrated protocol handling for ISO/IEC 15693, ISO/IEC 18000-3, ISO/IEC 14443 A and B, and FeliCa
• ISO/IEC 14443 A anti-collision (broken bytes) via integrated state machine
• Input voltage range: 2.7VDC to 5.5VDC
• Programmable output power: +20dBm (100mW), +23dBm (200mW)
• Programmable I/O voltage levels from 1.8VDC to 5.5VDC
• Programmable system clock frequency output from 13.56MHz or 27.12MHz crystal or oscillator (RF, RF/2, RF/4)
• Integrated voltage regulator output for other system components (MCU, peripherals, indicators), 20mA (max)
• Programmable modulation depth
• Dual receiver architecture with RSSI for "read gap" elimination and in-band noise detection for adjacent reader systems or surrounding environments
• Programmable power modes for ultra-low-power system design (< 1µA in power-down)
• Parallel or SPI interface (with 127-byte FIFO)
• Temperature range: -40°C to 110°C
• 32-pin QFN package (5mm×5mm)

Applications

• Public transportation or event ticketing
• Passport or point-of-sale (POS) reader systems
• Product identification or authentication
• Medical device or consumable access control, digital door locks