SLOS787I – MAY 2012 – REVISED MARCH 2017
TRF7964A Multiprotocol Fully Integrated 13.56-MHz RFID Reader and Writer IC
1 Device Overview
• Completely Integrated Protocol Handling for
ISO/IEC 15693, ISO/IEC 18000-3, ISO/IEC 14443
A and B, and FeliCa™
• Integrated State Machine for ISO/IEC 14443 A
Anticollision (Broken Bytes) Operation
• Input Voltage Range: 2.7 VDC to 5.5 VDC
• Programmable Output Power: +20 dBm (100 mW),
+23 dBm (200 mW)
• Programmable I/O Voltage Levels From 1.8 VDC
to 5.5 VDC
• Programmable System Clock Frequency Output
(RF, RF/2, RF/4) from 13.56-MHz or 27.12-MHz
Crystal or Oscillator
• Integrated Voltage Regulator Output for Other
System Components (MCU, Peripherals,
Indicators), 20 mA (Max)
• Programmable Modulation Depth
• Dual Receiver Architecture With RSSI for
Elimination of "Read Holes" and Adjacent Reader
System or Ambient In-Band Noise Detection
• Programmable Power Modes for Ultra Low-Power
System Design (Power Down <1 µA)
• Parallel or SPI Interface (With 127-Byte FIFO)
• Temperature Range: –40°C to 110°C
• 32-Pin QFN Package (5 mm × 5 mm)
• Public Transport or Event Ticketing
• Passport or Payment (POS) Reader Systems
• Product Identification or Authentication
• Medical Equipment or Consumables
• Access Control, Digital Door Locks
The TRF7964A device is an integrated analog front end (AFE) and multiprotocol data-framing device for a
13.56-MHz NFC/RFID reader and writer system supporting ISO/IEC 14443 A and B, Sony FeliCa, and
ISO/IEC 15693. Pin-to-pin and firmware compatible with the superset device TRF7970A. Built-in
programming options make the device suitable for a wide range of applications for proximity and vicinity
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 device supports data rates up to 848 kbps with all framing and synchronization tasks for
the ISO protocols onboard. Other standards and even custom protocols can be implemented by using one
of the direct modes the device offers. These direct modes let the user fully control the AFE and also gain
access to the raw subcarrier data or the unframed, but already ISO-formatted, data and the associated
(extracted) clock signal.
The receiver system has a dual-input receiver architecture to maximize communication robustness. The
receivers also include various automatic and manual gain control options. The received signal strength
from transponders, ambient sources, or internal levels is available in the RSSI register.
A SPI or parallel interface can be used for the communication between the MCU and the TRF7964A
device. When the built-in hardware encoders and decoders are used, transmit and receive functions use a
127-byte FIFO register. For direct transmit or receive functions, the encoders or decoders can be
bypassed so the MCU can process the data in real time.
The TRF7964A device supports a wide supply voltage range of 2.7 V to 5.5 V and data communication
levels from 1.8 V to 5.5 V for the MCU I/O interface.
The transmitter has selectable output power levels of 100 mW (+20 dBm) or 200 mW (+23 dBm)
equivalent into a 50-Ω load when using a 5-V supply and supports OOK and ASK modulation with
selectable modulation depth.
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.