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Microchip Technology ATMEGA64RFR2-ZUR
- Part No.:
- ATMEGA64RFR2-ZUR
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA64RFR2-ZUR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,644
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Product details
Overview
ATMEGA64RFR2-ZUR from Microchip Technology (formerly Atmel) is an 8-bit AVR microcontroller with integrated 2.4 GHz IEEE 802.15.4-compliant transceiver, delivering 64 KB Flash, 2 KB EEPROM, 8 KB SRAM, and -100 dBm RX sensitivity at 250 kb/s. It operates from 1.8–3.6 V, supports ZigBee® and RF4CE protocols, and targets battery-powered wireless sensor nodes and smart home endpoints.
For engineers reviewing the ATMEGA64RFR2-ZUR datasheet, ATMEGA64RFR2-ZUR pinout, ATMEGA64RFR2-ZUR application, or ATMEGA64RFR2-ZUR equivalent, key selection criteria include its monolithic 2.4 GHz transceiver integration, hardware-assisted MAC, AES-128 security engine, ultra-low deep-sleep current (<700 nA), and QFN-64 package with dedicated RF I/O pins.
Technical Context
The ATMEGA64RFR2-ZUR integrates a Harvard-architecture AVR CPU with 135 single-cycle instructions and a fully integrated 2.4 GHz DSSS transceiver featuring fractional-N PLL, hardware CRC-16, auto-acknowledge, and 32-bit symbol counter. Its dual-voltage architecture separates analog (EVDD/AVSS) and digital (DEVDD/DVSS) domains to minimize noise coupling between MCU and RF sections.
It implements hardware-accelerated IEEE 802.15.4 PHY/MAC functions including spreading/despreading, SFD detection, frame buffering (128-byte TX/RX), and antenna diversity control - all without host CPU intervention. The transceiver supports data rates of 250/500 kb/s, 1 Mb/s, and 2 Mb/s, with configurable TX output up to +3.5 dBm and programmable RX gain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | AVR 8-bit RISC with 32 general-purpose registers and 2-cycle hardware multiplier |
| Flash Memory | 64 KB ISP Flash with read-while-write capability; enables firmware updates over-the-air |
| RF Frequency Band | 2.4 GHz ISM band (2400–2483.5 MHz); compliant with IEEE 802.15.4-2011/2006/2003 |
| RX Sensitivity | -100 dBm at 250 kb/s; ensures robust link budget in low-power mesh networks |
| TX Output Power | Up to +3.5 dBm; supports extended range without external PA |
| Supply Current | Deep Sleep: <700 nA @ 25°C; RX_ON: 6.0 mA; BUSY_TX: 18.6 mA (max power) |
| Operating Voltage | 1.8–3.6 V; internal voltage regulators enable stable operation across battery discharge curve |
| Temperature Range | -40°C to +125°C industrial grade; qualified for harsh environmental deployment |
Pinout & Package
ATMEGA64RFR2-ZUR uses a 64-pad QFN package (RoHS/Fully Green) with exposed metal paddle internally connected to AVSS. Mechanical stability requires soldering or gluing the center pad to the PCB ground plane. Dedicated RF pins (RFP/RFN) are isolated with separate analog grounds (AVSS_RFP/AVSS_RFN) to suppress coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O port | Direct connection to 50 Ω antenna or balun; requires impedance-matched layout and isolation |
| AVSS_RFP / AVSS_RFN | Dedicated RF ground returns | Must be routed separately from digital/analog ground to prevent RF noise injection into MCU core |
| XTAL1 / XTAL2 | 16 MHz crystal oscillator inputs | Drive external 16 MHz crystal for radio timing; critical for IEEE 802.15.4 symbol accuracy |
| EVDD / AVSS | Analog supply and ground | Powers ADC, temperature sensor, and RF front-end; requires local decoupling near pins |
| DEVDD / DVSS | Digital supply and ground | Powers CPU, peripherals, and digital baseband; separate from analog domain for noise immunity |
| PG0–PG5, PB0–PB7, PD0–PD7, PE0–PE7, PF0–PF7 | Programmable I/O ports | 38 total GPIO with alternate functions (USART, SPI, TWI, timers, ADC); support internal pull-ups |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-assisted MAC | Auto-acknowledge, auto-retry, and frame filtering reduce host CPU load and improve protocol reliability |
| AES-128 encryption engine | Dedicated on-chip cryptographic accelerator enables secure key exchange and payload encryption without software overhead |
| True Random Number Generator | Entropy source compliant with NIST SP 800-90A; essential for secure key generation in ZigBee Trust Center |
| Multiple power-save modes | Deep Sleep (<700 nA), Power-down, Power-save, ADC Noise Reduction, Standby, Extended Standby - optimized per use case |
| Integrated 32.768 kHz oscillator | Enables RTC and low-power wake-up without external crystal; supports precise sleep scheduling |
| 10-bit ADC with differential input | 8-channel SAR ADC with programmable gain; supports sensor interfacing (e.g., temperature, humidity, light) |
Applications
| Smart Home Sensor Node | ZigBee® Router |
|---|---|
Use Scenario: Battery-powered door/window contact sensor with periodic status reporting and tamper detection. IC Role / Device Role / Timing Role: Full Function Device (FFD) executing ZigBee stack, managing RF link, and sampling magnetic reed switch via GPIO interrupt. Use Value: Ultra-low deep-sleep current extends 2-year battery life; hardware MAC offloads timing-critical ACK handling from firmware. | Use Scenario: Mains-powered repeater extending mesh coverage in multi-room lighting control system. IC Role / Device Role / Timing Role: ZigBee coordinator/router forwarding packets between end devices and gateway using hardware frame buffering. Use Value: 128-byte TX/RX frame buffers and auto-retry eliminate packet loss under interference; +3.5 dBm TX ensures >30 m indoor range. |
| Industrial Wireless Monitor | RF4CE Remote Control |
Use Scenario: Wireless temperature/humidity monitor in HVAC ducts with periodic telemetry and alarm-triggered transmission. IC Role / Device Role / Timing Role: Reduced Function Device (RFD) with hardware AES encryption securing sensor payloads before transmission. Use Value: On-chip AES-128 prevents eavesdropping on sensitive environmental data; -100 dBm sensitivity maintains link in electrically noisy environments. | Use Scenario: Low-latency TV remote supporting bidirectional pairing and firmware updates. IC Role / Device Role / Timing Role: RF4CE endpoint implementing MAC layer timing, channel agility, and secure key negotiation. Use Value: Hardware symbol counter and PLL synthesizer ensure sub-10 ms channel switching and jitter-free command delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2.4 GHz wireless microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA128RFA1-ZUR | 128 KB Flash, 4 KB EEPROM, same QFN-64 package and pinout; lacks AES engine and true RNG | Suitable for cost-sensitive ZigBee RFDs where security is handled externally or omitted | Select when higher memory is needed but cryptographic acceleration is not required |
| CC2652R1FIPNR | ARM Cortex-M4F core, 352 KB Flash, integrated BLE 5.1 + IEEE 802.15.4; different package (VQFN-48) and pinout | Better suited for multi-protocol gateways or applications requiring BLE coexistence and larger code space | Select when migrating to ARM ecosystem or needing concurrent BLE/802.15.4 operation |
Compared with ATMEGA128RFA1-ZUR, ATMEGA64RFR2-ZUR adds hardware AES and true RNG for enhanced security at lower memory capacity; compared with CC2652R1FIPNR, it offers mature AVR toolchain support and lower active current but lacks BLE and uses legacy 8-bit architecture.
Availability
ATMEGA64RFR2-ZUR is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial wireless monitors, ZigBee® routers, and RF4CE remote controls requiring stable component supply and long-term lifecycle assurance.
Supply support for ATMEGA64RFR2-ZUR 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
Microchip Technology is a global semiconductor company delivering microcontrollers, analog, FPGA, and connectivity solutions with emphasis on reliability, longevity, and design-in support.
The ATMEGA64RFR2-ZUR belongs to Microchip's legacy AVR wireless MCU family, designed specifically for low-power, standards-compliant 2.4 GHz mesh networking in constrained embedded systems.
FAQ
What is the maximum transmit output power of the ATMEGA64RFR2-ZUR?
The ATMEGA64RFR2-ZUR delivers up to +3.5 dBm TX output power in the 2.4 GHz ISM band. This value is achieved under specified conditions (3.6 V supply, 25°C ambient) and represents the highest configurable setting in the transceiver's power amplifier register. Actual radiated power depends on antenna efficiency and PCB layout; users must comply with regional regulatory limits (e.g., FCC Part 15.247, ETSI EN 300 328).
Does the ATMEGA64RFR2-ZUR support AES encryption in hardware?
Yes, the ATMEGA64RFR2-ZUR includes a dedicated hardware AES-128 encryption engine compliant with FIPS-197. It accelerates both encryption and decryption operations with zero CPU cycles overhead, enabling secure ZigBee network key establishment and encrypted payload transmission. The engine interfaces directly with the transceiver's frame buffer, allowing full-frame encryption before RF transmission.
What package type and pin count does the ATMEGA64RFR2-ZUR use?
The ATMEGA64RFR2-ZUR uses a 64-pad QFN (Quad Flat No-lead) package with an exposed metal thermal pad. It is RoHS-compliant and fully green. The package provides 38 programmable I/O lines plus dedicated RF, power, and clock pins. Pin compatibility with ATMEGA128RFA1-ZUR allows reuse of footprint in some designs, though functional differences require firmware validation.
Can the ATMEGA64RFR2-ZUR operate from a single 3.3 V supply?
Yes, the ATMEGA64RFR2-ZUR operates across 1.8–3.6 V, making 3.3 V a valid and commonly used supply voltage. Internal voltage regulators generate separate DVDD (digital) and AVDD (analog) rails, ensuring stable MCU and RF operation despite input rail variation. When powered at 3.3 V, typical active current is 10.1 mA (CPU + RX) and 18.6 mA (CPU + TX at max power), with deep-sleep current remaining below 700 nA.
Is an external crystal required for the ATMEGA64RFR2-ZUR RF functionality?
Yes, a 16 MHz external crystal is required between XTAL1 and XTAL2 pins to provide the reference clock for the 2.4 GHz transceiver's fractional-N PLL. The device also integrates a 32.768 kHz oscillator for RTC and low-power timing, eliminating need for a second crystal in most applications. Crystal load capacitance and PCB layout must follow Microchip's layout guidelines to meet IEEE 802.15.4 symbol timing accuracy requirements.
ATMEGA64RFR2-ZUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4
- Protocol:
- Zigbee®
- Modulation:
- DSSS, O-QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 3.5dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 64kB Flash, 2kB EEPROM, 8kB SRAM
- Serial Interfaces:
- I2C, JTAG, SPI, USART
- GPIO:
- 35
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 5mA ~ 12.5mA
- Current - Transmitting:
- 8mA ~ 14.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-QFN (9x9)
ATMEGA64RFR2-ZUR FAQ
1.How can I place an order for ATMEGA64RFR2-ZUR through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA64RFR2-ZUR 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 ATMEGA64RFR2-ZUR reliable?
The price and inventory of ATMEGA64RFR2-ZUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA64RFR2-ZUR is usually 5 days.
3.What payment methods are accepted for ATMEGA64RFR2-ZUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA64RFR2-ZUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA64RFR2-ZUR?
ATMEGA64RFR2-ZUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA64RFR2-ZUR 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 ATMEGA64RFR2-ZUR?
For technical support, including ATMEGA64RFR2-ZUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA64RFR2-ZUR requirements.
6.How does Aetrix verify that ATMEGA64RFR2-ZUR is sourced from the original manufacturer or authorized distributors?
All ATMEGA64RFR2-ZUR 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 ATMEGA64RFR2-ZUR meets industry standards.
7.What is the process for return or replacement of ATMEGA64RFR2-ZUR?
All ATMEGA64RFR2-ZUR units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA64RFR2-ZUR, 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 ATMEGA64RFR2-ZUR part is unused and in its original packaging.
Return procedure for ATMEGA64RFR2-ZUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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