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Texas Instruments TRF7961RHBT
- Part No.:
- TRF7961RHBT
- Manufacturer:
- Texas Instruments
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TRF7961RHBT.pdf
- Description:
- IC RFID READER 13.56MHZ 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:647
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Product details
Overview
TRF7961RHBT from Texas Instruments is a fully integrated 13.56-MHz RFID analog front end and data-framing reader IC supporting ISO/IEC 14443 A/B, FeliCa, and ISO/IEC 15693 protocols. It delivers 100 mW or 200 mW RF output power, features dual AM/PM receiver inputs with RSSI, and operates from 2.7 V to 5.5 V supply - enabling secure access control readers with extended read range and robust tag communication.
For engineers reviewing the TRF7961RHBT datasheet, TRF7961RHBT pinout, TRF7961RHBT application, or TRF7961RHBT equivalent, key selection considerations include its 32-pin VQFN (5 mm × 5 mm) package, SPI/parallel interface flexibility, programmable ASK modulation depth (8–30%), ultra-low-power modes (<1 µA power-down), and built-in 20-mA LDO for MCU supply.
Technical Context
The TRF7961RHBT implements a dual-input receiver architecture with independent AM and PM demodulation paths, minimizing communication holes across varying tag orientations and field conditions. Its internal framing engine handles SOF/EOF, CRC, parity, and bit-collision detection for ISO/IEC 14443 and ISO/IEC 15693 without MCU intervention.
It supports direct-mode operation where encoders/decoders are bypassed, allowing real-time MCU access to raw subcarrier data or unframed ISO-formatted data with extracted clock. The device integrates three high-PSRR regulators (VDD_RF, VDD_A, VDD_X) with configurable voltage settings and automatic/manual modes to optimize RF output power and noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 13.56 MHz carrier with support for 106/212/424/848 kbps data rates per ISO standards |
| RF Output Power | Selectable 100 mW (+20 dBm) or 200 mW (+23 dBm) into 50 Ω at 5 V supply |
| Supply Voltage Range | 2.7 V to 5.5 V VIN; I/O voltage independently configurable from 1.8 V to 5.5 V via VDD_I/O |
| Power Consumption | <1 µA in power-down mode; 120 µA in standby; 10 mA active RX only; up to 120 mA full TX+RX |
| Modulation Support | ASK (8–30% depth) and OOK; selectable via ASK/OOK pin or register control |
| Interface Options | 8-bit parallel or 4-wire SPI with 12-byte FIFO; DATA_CLK up to 8 MHz (load-dependent) |
| Receiver Sensitivity | 1.2–3.0 mVPP at 424/848 kHz subcarriers; dual RX_IN1 (AM) and RX_IN2 (PM) inputs |
Pinout & Package
The TRF7961RHBT is housed in a 32-pin VQFN package (RHB) with 5 mm × 5 mm body size and exposed thermal pad connected to ground. Pin pitch is 0.5 mm; RoHS-compliant and moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (2) | Main supply input | Accepts 2.7–5.5 V; sources internal regulators (VDD_RF, VDD_A, VDD_X) |
| TX_OUT (5) | RF power amplifier output | Delivers 100/200 mW; requires external impedance matching network |
| RX_IN1 (8), RX_IN2 (9) | Dual receiver inputs | RX_IN1 = AM path; RX_IN2 = PM path; each with 5–20 kΩ input resistance |
| IRQ (13) | Interrupt request output | Active-low signal indicating packet completion, error, or FIFO status |
| ASK/OOK (12) | Modulation mode select | Logic level selects ASK (0) or OOK (1); also configurable as analog output (ANA_OUT) |
| VDD_X (32) | Auxiliary LDO output | Programmable 2.7–3.8 V, 20 mA max; powers external MCU or peripherals |
| EN (28), EN2 (25) | Enable control inputs | EN = main chip enable; EN2 enables low-power wake-up and VDD_X retention in PD2 mode |
| SYS_CLK (27) | MCU system clock output | Provides 30 kHz (PD2), 3.39/6.78/13.56 MHz (active) for synchronous MCU timing |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path AM/PM demodulation | Eliminates blind spots in RF field coverage by simultaneously processing amplitude- and phase-modulated signals from tags |
| Programmable ASK modulation depth | 8–30% adjustment enables optimization for different tag types and regulatory requirements (e.g., ETSI vs FCC) |
| Built-in protocol framing engine | Automatically generates SOF/EOF, CRC, parity, and bit-collision detection for ISO/IEC 14443 A/B and ISO/IEC 15693 |
| High-PSRR multi-rail regulation | Separate analog, digital, and PA supplies reduce cross-talk; >20 dB PSRR at 212 kHz improves read reliability in noisy environments |
| Direct-mode data access | Bypasses internal encoders/decoders to expose raw subcarrier or pre-framed ISO data + clock - essential for custom protocol development |
Applications
| Secure Access Control | Product Authentication |
|---|---|
Use Scenario: Contactless door entry systems for corporate offices or data centers requiring tamper-resistant credential verification. IC Role / Device Role / Timing Role: TRF7961RHBT acts as the complete RFID reader front end - handling analog signal conditioning, protocol framing, and bidirectional command/response with ISO 14443-A/B smart cards. Use Value: Dual AM/PM receiver and 200 mW output enable reliable reading through metal doors or thick enclosures where single-path receivers fail. | Use Scenario: High-value consumables (e.g., pharmaceuticals, luxury cosmetics) with embedded NFC tags scanned at point-of-sale. IC Role / Device Role / Timing Role: TRF7961RHBT executes FeliCa or ISO 15693 anti-counterfeiting handshakes, verifying cryptographic signatures in <100 ms. Use Value: Programmable ASK depth and adjustable receiver gain allow consistent tag interrogation across diverse packaging materials (glass, foil, plastic). |
| Medical Systems | Public Transport Ticketing |
Use Scenario: RFID-enabled patient wristbands and medical device tracking in hospitals with strict EMI constraints. IC Role / Device Role / Timing Role: TRF7961RHBT serves as the isolated reader subsystem - interfacing via SPI to a safety-certified MCU while maintaining <1 µA power-down current during idle periods. Use Value: Ultra-low-power modes and separate regulated supplies prevent interference with sensitive diagnostic equipment operating nearby. | Use Scenario: Fast-throughput fare gates in metro systems requiring sub-200-ms card validation under high passenger volume. IC Role / Device Role / Timing Role: TRF7961RHBT performs ISO 14443-B collision resolution and rapid frame decoding to support concurrent multi-tag polling. Use Value: 848 kbps data rate support and hardware-accelerated CRC checking reduce transaction latency versus software-based readers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RFID reader analog front end applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TRF7960RHB | Identical pinout and register map; supports same protocols but lacks ISO/IEC 15693 support per datasheet Table 3-1 | Not suitable for ISO 15693-based asset tracking or library management systems | Select TRF7960RHB only if ISO 15693 is excluded from system requirements and cost minimization is critical |
| ST25R3916B | Supports ISO 14443 A/B, FeliCa, and ISO 15693; higher integration (integrated EEPROM, advanced NFC initiator modes); 48-pin QFN | Enables NFC peer-to-peer and card emulation; requires PCB redesign due to larger footprint and different pin assignment | Choose ST25R3916B when NFC Forum compliance, embedded firmware storage, or initiator functionality is required |
Compared with TRF7960RHB and ST25R3916B, the TRF7961RHBT uniquely balances full multi-standard support (including ISO 15693), compact 32-pin layout, and ultra-low-power operation - making it optimal for space-constrained, battery-powered, or industrial-grade RFID readers where protocol breadth and power efficiency are co-prioritized.
Availability
TRF7961RHBT is available at Aetrix Electronics and suitable for secure access control systems, medical device identification platforms, and public transport fare collection terminals requiring stable component supply and long-term industrial availability.
Supply support for TRF7961RHBT 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 leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.
The TRF7961RHBT belongs to TI's RFID reader AFE product line, engineered specifically for high-performance, multi-protocol contactless identification systems operating in demanding electromagnetic environments.
FAQ
What communication interfaces does the TRF7961RHBT support?
The TRF7961RHBT supports both an 8-bit parallel interface and a 4-wire SPI interface, each using a shared 12-byte FIFO for transmit/receive data flow. The SPI mode uses I/O_7 (MOSI), I/O_6 (MISO), DATA_CLK, and EN as chip-select proxy. Parallel mode uses I/O_0–I/O_7 as bidirectional data bus with separate strobe and direction control. TRF7961RHBT does not support I²C or UART natively.
Does the TRF7961RHBT include an integrated crystal oscillator?
No, the TRF7961RHBT requires an external 13.56-MHz crystal connected between OSC_IN (pin 31) and OSC_OUT (pin 30). The device contains a built-in crystal oscillator circuit but no integrated resonator - the crystal must be placed externally with appropriate load capacitors per layout guidelines in Section 7 of the datasheet. TRF7961RHBT does not operate with ceramic resonators or RC oscillators.
How does the TRF7961RHBT handle power management for battery-operated devices?
The TRF7961RHBT offers three low-power states: power-down (<1 µA, all regulators off), standby (120 µA, oscillator active), and active RX-only (10 mA). EN and EN2 pins control entry/exit; EN2 enables VDD_X retention during power-down to keep external MCU alive. TRF7961RHBT's automatic regulator configuration further reduces dynamic power by optimizing VDD_RF/VDD_A based on selected output power level.
Can the TRF7961RHBT read ISO/IEC 15693 tags?
Yes, the TRF7961RHBT explicitly supports ISO/IEC 15693 (and ISO/IEC 18000-3 Mode 1) as confirmed in the Device Comparison table (Table 3-1) and Section 1.3. This capability distinguishes it from the TRF7960RHB, which omits ISO/IEC 15693 support. TRF7961RHBT handles 1-out-of-4 and 1-out-of-256 coding, subcarrier frequencies up to 424 kHz, and inventory commands including Select, Inventory, and Stay Quiet.
What is the function of the ASK/OOK pin on the TRF7961RHBT?
The ASK/OOK pin (pin 12) configures the transmitter modulation type: logic low selects ASK (amplitude shift keying) with programmable depth (8–30%), and logic high selects OOK (on-off keying). In direct mode, this pin can alternatively output the received analog baseband signal (ANA_OUT) for external analysis. TRF7961RHBT allows register-based override of this pin's function, enabling dynamic modulation switching during operation.
TRF7961RHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- RFID Reader
- Frequency:
- 13.56MHz
- Standards:
- ISO 14443, ISO 15693, ISO 18000-3
- Interface:
- SPI
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 110°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
TRF7961RHBT FAQ
1.How can I place an order for TRF7961RHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TRF7961RHBT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TRF7961RHBT reliable?
The price and inventory of TRF7961RHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TRF7961RHBT is usually 5 days.
3.What payment methods are accepted for TRF7961RHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TRF7961RHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TRF7961RHBT?
TRF7961RHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TRF7961RHBT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TRF7961RHBT?
For technical support, including TRF7961RHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TRF7961RHBT requirements.
6.How does Aetrix verify that TRF7961RHBT is sourced from the original manufacturer or authorized distributors?
All TRF7961RHBT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TRF7961RHBT meets industry standards.
7.What is the process for return or replacement of TRF7961RHBT?
All TRF7961RHBT units undergo pre-shipment inspection (PSI). If there is an issue with TRF7961RHBT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TRF7961RHBT part is unused and in its original packaging.
Return procedure for TRF7961RHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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