Texas Instruments TRF7964ARHBT

Overview

TRF7964ARHBT from Texas Instruments is a fully integrated 13.56-MHz multiprotocol RFID reader and writer IC supporting ISO/IEC 14443 A/B, ISO/IEC 15693, ISO/IEC 18000-3 Mode 1, and FeliCa. It delivers +23 dBm (200 mW) RF output power into 50 Ω, operates from 2.7 V to 5.5 V input supply, features dual-receiver architecture with RSSI, and integrates a 127-byte FIFO for SPI/parallel MCU interface - deployed in secure access control and transit ticketing systems.

For engineers reviewing the TRF7964ARHBT datasheet, TRF7964ARHBT pinout, TRF7964ARHBT application, or TRF7964ARHBT equivalent, key selection considerations include its programmable modulation depth, 32-pin QFN package with thermal pad, –40°C to 110°C operating range, and support for direct-mode subcarrier access for custom protocol implementation.

Technical Context

The TRF7964ARHBT implements a dual-input analog front end with independent gain control per receiver path (RX_IN1/RX_IN2), enabling ambient noise detection and elimination of "read holes" via real-time RSSI comparison. Its digital baseband includes on-chip ISO framing logic for 106–848 kbps data rates, CRC/parity generation, SOF/EOF insertion, and a state machine for ISO/IEC 14443 A anticollision handling.

It supports two operational modes: default protocol-handling mode (with hardware encoders/decoders) and direct modes (0 and 1), where the MCU gains raw subcarrier or unframed ISO-formatted data plus extracted clock - enabling MIFARE™ compatibility enhancements and proprietary protocol development without firmware modification of the core engine.

Key Specifications

Pinout & Package

TRF7964ARHBT is housed in a 32-pin VQFN package (RHB) measuring 5 mm × 5 mm with an exposed thermal pad. The package supports reflow soldering and provides low-inductance grounding via the bottom pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RFID transceiver applications.

Compared with TRF7964ARHBT, TRF7970ARHBT adds NFC Forum stack support and P2P capability at identical footprint and power envelope, while RC663B02HN/V1 trades integrated regulation for higher ruggedness and separate supply flexibility - making TRF7964ARHBT optimal for cost-sensitive, self-contained reader designs needing auxiliary power.

Availability

TRF7964ARHBT is available at Aetrix Electronics and suitable for access control systems, transit ticketing terminals, medical device authentication, and POS payment readers requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for TRF7964ARHBT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with leadership in industrial, automotive, and communications markets.

The TRF7964ARHBT belongs to TI's RFID transceiver product line, designed specifically for compact, low-power, multiprotocol 13.56-MHz reader systems targeting secure identification, payment, and authentication applications.

FAQ

What is the maximum RF output power of the TRF7964ARHBT and under what conditions?

The TRF7964ARHBT delivers up to +23 dBm (200 mW) RF output power into a 50-Ω load when supplied with 5 V at VIN and configured for full-power mode. This requires proper impedance matching at TX_OUT (Pin 5) and stable 5-V VDD_PA regulation. At lower supply voltages (e.g., 3.3 V), output power scales accordingly and must be verified per the electrical characteristics table in the datasheet.

Does the TRF7964ARHBT support both SPI and parallel interfaces simultaneously?

No - the TRF7964ARHBT supports either SPI or 8-bit parallel interface, selected via configuration registers and hardware strapping. I/O_0–I/O_7 serve as bidirectional data lines in parallel mode or as SPI signals (MOSI/MISO/SS) in serial mode. The interface mode is mutually exclusive and must be set during initialization; mixing modes is not supported.

How does the dual-receiver architecture in the TRF7964ARHBT improve read reliability?

The TRF7964ARHBT uses RX_IN1 and RX_IN2 to sample the same RF field simultaneously with independent gain paths and RSSI reporting. By comparing signal strength and phase across both inputs, the IC detects ambient in-band noise or adjacent reader interference and dynamically selects the cleaner path - eliminating "read holes" caused by destructive interference or shielding effects in real-world deployments.

Can the TRF7964ARHBT operate with a 3.3-V microcontroller I/O interface?

Yes - the TRF7964ARHBT includes programmable I/O voltage levels from 1.8 V to 5.5 V via the Regulator and I/O Control register (0x0B). When VDD_I/O (Pin 16) is supplied with 3.3 V, all I/O pins (I/O_0–I/O_7, IRQ, DATA_CLK, etc.) comply with 3.3-V logic thresholds, enabling direct interfacing with common ARM or MSP430 microcontrollers without external level shifters.

What is the purpose of the VDD_X pin (Pin 32) on the TRF7964ARHBT?

VDD_X (Pin 32) is an internally regulated output supplying 2.7–3.4 V at up to 20 mA, intended to power external components such as the host microcontroller, LEDs, or sensors within the reader system. It eliminates the need for a separate LDO in space-constrained designs and is enabled/disabled via register control - simplifying bill-of-materials and improving power-domain coordination.