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Microchip Technology ATMEGA64RFR2-ZF
- Part No.:
- ATMEGA64RFR2-ZF
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA64RFR2-ZF.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,194
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Product details
Overview
ATMEGA64RFR2-ZF from Microchip Technology (formerly Atmel) is an 8-bit AVR microcontroller integrated with a 2.4 GHz IEEE 802.15.4/ZigBee transceiver in a single QFN package. It delivers 64 KB Flash, 2 KB EEPROM, 8 KB SRAM, 38 programmable I/O lines, and operates from 1.8–3.6 V. It targets low-power wireless end-node applications such as sensor nodes and battery-operated IoT devices.
For engineers reviewing the ATMEGA64RFR2-ZF datasheet, ATMEGA64RFR2-ZF pinout, ATMEGA64RFR2-ZF application, or ATMEGA64RFR2-ZF equivalent, key selection criteria include its integrated MAC hardware acceleration, -100 dBm RX sensitivity, 3.5 dBm TX output power, AES security engine, and support for 250 kb/s to 2 Mb/s data rates in the 2.4 GHz ISM band.
Technical Context
The ATMEGA64RFR2-ZF combines an enhanced RISC AVR core-executing 135 instructions at up to 16 MIPS @ 16 MHz-with a fully integrated 2.4 GHz transceiver featuring fractional-N PLL synthesis, DSSS modulation, hardware CRC-16, auto-acknowledge, and 32-bit IEEE 802.15.4 symbol counter. Its dual crystal support (16 MHz for RF, 32.768 kHz for low-power timing) enables precise synchronization across sleep/wake cycles.
It implements dedicated analog/digital supply domains (EVDD/DEVDD, AVDD/DVDD), separate RF ground pins (AVSS_RFP/AVSS_RFN), and hardware-assisted power management-including Deep Sleep mode (<700 nA @ 25°C) and multiple software-selectable sleep modes-optimized for multi-year battery life in ZigBee end-node deployments.
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 for firmware updates without halting operation |
| RF Data Rate | 250 kb/s, 500 kb/s, 1 Mb/s, and 2 Mb/s - selectable per link requirement and regulatory compliance |
| RX Sensitivity | -100 dBm at 250 kb/s - enables robust reception in low-SNR environments like industrial sensor networks |
| TX Output Power | Up to +3.5 dBm - supports extended range without external PA in compact PCB layouts |
| Supply Voltage Range | 1.8–3.6 V - compatible with single-cell Li-ion, LiFePO₄, or dual-cell alkaline battery systems |
| Deep Sleep Current | <700 nA @ 25°C - preserves battery capacity during multi-hour idle intervals in periodic sensing |
Pinout & Package
64-pin QFN (RoHS/Fully Green) with exposed metal paddle internally connected to AVSS; requires soldering to PCB ground plane for mechanical stability and thermal performance. Pin count and layout are identical across ATmega256RFR2/128RFR2/64RFR2 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O port terminals | 100 Ω differential interface requiring balun conversion for 50 Ω single-ended antenna connection |
| AVSS_RFP / AVSS_RFN | Dedicated RF ground returns | Isolate RF return current from digital/analog ground paths to preserve receiver sensitivity |
| XTAL1 / XTAL2 | 16 MHz crystal oscillator inputs | Provide frequency reference for RF transceiver PLL; require low-parasitic routing and 12 pF load capacitors |
| TST / CLKI | Test enable and external clock input | TST must be tied low if unused; CLKI allows external clock injection for synchronous system timing |
| DEVDD / EVDD | Digital and analog external supply inputs | Enable independent supply domain control and bypass capacitor placement per noise isolation best practice |
Key Features
| Feature | Design Value |
|---|---|
| Hardware MAC Acceleration | Auto-acknowledge, auto-retry, frame buffering (128-byte TX/RX), and CRC-16 offload CPU during packet handling |
| AES-128 Security Engine | Dedicated cryptographic accelerator enabling secure key exchange and payload encryption without software overhead |
| Antenna Diversity Support | Hardware-controlled RF switch control via DIG1/DIG2 (PG1/PG2) for improved link reliability in multipath environments |
| Phase Measurement Capability | On-chip RF phase detection supports time-of-flight ranging and angle-of-arrival estimation in mesh localization |
| Multiple Low-Power Modes | Deep Sleep (<700 nA), Power-save (asynchronous timer active), and ADC Noise Reduction optimize energy per sensing event |
Applications
| Smart Home Sensor Node | ZigBee End Device |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor reporting every 5 minutes to a ZigBee coordinator. IC Role / Device Role / Timing Role: Integrated MCU+RF SoC performs sensing, local processing, MAC-layer packet assembly, and scheduled 2.4 GHz transmission. Use Value: 64 KB Flash stores sensor fusion algorithms; Deep Sleep current <700 nA extends 2xAA battery life beyond 5 years. |
Use Scenario: Wireless light switch sending on/off commands in a residential ZigBee lighting network. IC Role / Device Role / Timing Role: Acts as Reduced Function Device (RFD) with no routing responsibilities; handles button debouncing, encryption, and beacon-assisted association. Use Value: Hardware AES-128 ensures secure command transmission; auto-acknowledge guarantees delivery confirmation without host software intervention. |
| Industrial Asset Monitor | Wireless HVAC Controller |
|
Use Scenario: Vibration and temperature monitoring of rotating machinery in factory settings. IC Role / Device Role / Timing Role: Performs real-time FFT preprocessing on ADC samples, triggers alerts via IEEE 802.15.4 frames using hardware symbol counter timestamps. Use Value: 10-bit 330 ks/s ADC captures transient events; -40°C to +125°C rating ensures operation near motors and transformers. |
Use Scenario: Wall-mounted thermostat communicating setpoint changes and occupancy status over ZigBee. IC Role / Device Role / Timing Role: Combines ambient sensing (on-chip temperature sensor), user interface (GPIO-driven buttons/LEDs), and secure RF communication. Use Value: Integrated 32.768 kHz oscillator drives RTC and MAC symbol counter independently during Deep Sleep, enabling precise wake-up scheduling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit wireless microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA128RFR2-ZF | 128 KB Flash, 4 KB EEPROM, 16 KB SRAM, identical RF subsystem and pinout | Supports larger protocol stacks (e.g., ZigBee Pro) and more complex sensor fusion logic | Select when firmware size exceeds 64 KB or additional RAM is required for multi-threaded ZDO tasks |
| CC2652RBIPNRT | ARM Cortex-M4F core, 352 KB Flash, integrated crystal-less BAW resonator, BLE 5.2 + IEEE 802.15.4 dual-mode | Higher compute throughput, lower RX current (5.9 mA), but requires external security co-processor for full ZigBee stack compliance | Choose for future-proofing with BLE interoperability or when migrating from legacy AVR toolchains to TI-RTOS ecosystem |
Compared with ATMEGA64RFR2-ZF, ATMEGA128RFR2-ZF offers double memory resources while maintaining identical RF performance and footprint; CC2652RBIPNRT provides higher processing headroom and dual-radio flexibility but introduces architectural and toolchain discontinuity for existing AVR-based designs.
Availability
ATMEGA64RFR2-ZF is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial asset monitors, and wireless HVAC controllers requiring stable component supply and long-term lifecycle support.
Supply support for ATMEGA64RFR2-ZF 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 acquired Atmel in 2016 and maintains full support for the AVR wireless portfolio, including design tools, documentation, and long-term manufacturing commitments.
The ATMEGA64RFR2-ZF belongs to the ATmegaRFR2 family, engineered specifically for ultra-low-power IEEE 802.15.4 and ZigBee end-node applications where integration, battery longevity, and hardware-accelerated MAC security are critical.
FAQ
What is the maximum transmit output power of the ATMEGA64RFR2-ZF?
The ATMEGA64RFR2-ZF achieves up to +3.5 dBm TX output power in the 2.4 GHz ISM band. This value is measured under typical conditions (3.0 V supply, 250 kb/s data rate) and enables reliable communication over distances exceeding 100 meters in open-air environments. The RF front-end integrates high-power amplifier support with side-lobe suppression to meet FCC/ETSI spectral mask requirements without external filtering.
Does the ATMEGA64RFR2-ZF support hardware AES encryption?
Yes, the ATMEGA64RFR2-ZF includes a dedicated AES-128 cryptographic engine that operates independently of the AVR core. This allows secure key derivation, payload encryption, and authentication tag generation without consuming CPU cycles or exposing keys in RAM. The engine is accessible via memory-mapped I/O registers and supports ECB, CBC, and CTR modes required by ZigBee SE and Smart Energy profiles.
What crystal frequencies are required for the ATMEGA64RFR2-ZF?
The ATMEGA64RFR2-ZF requires two crystals: a 16 MHz fundamental-mode crystal connected to XTAL1/XTAL2 for RF transceiver timing and PLL reference, and a 32.768 kHz watch crystal connected to TOSC1/TOSC2 for low-power real-time clock and IEEE 802.15.4 symbol counter operation. Load capacitance for both must be ≤15 pF total shunt capacitance to ensure stable oscillation in Deep Sleep mode.
How many GPIO pins does the ATMEGA64RFR2-ZF provide?
The ATMEGA64RFR2-ZF provides 38 programmable I/O lines across Ports B, D, E, F, and G. Port A and Port C are not physically implemented (though their register addresses remain reserved for software compatibility). All 38 pins support configurable pull-ups, interrupt-on-change, and alternate functions including UART, SPI, TWI, PWM, and ADC inputs-enabling direct interface to sensors, actuators, and displays without external logic.
What is the minimum supply current in Deep Sleep mode for the ATMEGA64RFR2-ZF?
The ATMEGA64RFR2-ZF draws less than 700 nA in Deep Sleep mode at 25°C, with the 32.768 kHz oscillator, MAC symbol counter, and watchdog timer optionally enabled. This ultra-low leakage is achieved through internal power gating of non-retentive digital blocks and optimized process technology. At -40°C, current increases to ~1.2 µA, still enabling multi-year operation on standard coin-cell batteries in intermittent-sensing applications.
ATMEGA64RFR2-ZF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tray
- 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-QFN (7.5x7.5)
ATMEGA64RFR2-ZF FAQ
1.How can I place an order for ATMEGA64RFR2-ZF through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA64RFR2-ZF 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-ZF reliable?
The price and inventory of ATMEGA64RFR2-ZF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA64RFR2-ZF is usually 5 days.
3.What payment methods are accepted for ATMEGA64RFR2-ZF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA64RFR2-ZF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA64RFR2-ZF?
ATMEGA64RFR2-ZF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA64RFR2-ZF 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-ZF?
For technical support, including ATMEGA64RFR2-ZF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA64RFR2-ZF requirements.
6.How does Aetrix verify that ATMEGA64RFR2-ZF is sourced from the original manufacturer or authorized distributors?
All ATMEGA64RFR2-ZF 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-ZF meets industry standards.
7.What is the process for return or replacement of ATMEGA64RFR2-ZF?
All ATMEGA64RFR2-ZF units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA64RFR2-ZF, 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-ZF part is unused and in its original packaging.
Return procedure for ATMEGA64RFR2-ZF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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