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Microchip Technology ATMEGA2564RFR2-ZU
- Part No.:
- ATMEGA2564RFR2-ZU
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA2564RFR2-ZU.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
ATMEGA2564RFR2-ZU from Microchip (acquired Atmel) is a monolithic 8-bit AVR microcontroller integrated with a fully compliant IEEE 802.15.4-2011/2006/2003 and ZigBee-ready 2.4 GHz transceiver. It delivers 16 MIPS at 16 MHz, features 256 KB Flash, 8 KB EEPROM, 32 KB SRAM, and operates from 1.8–3.6 V. Used in battery-powered mesh network coordinators requiring hardware-accelerated MAC, AES encryption, and ultra-low deep-sleep current (<700 nA).
For engineers reviewing the ATMEGA2564RFR2-ZU datasheet, ATMEGA2564RFR2-ZU pinout, ATMEGA2564RFR2-ZU application, or ATMEGA2564RFR2-ZU equivalent, key selection criteria include its QFN48 package with dedicated RF differential I/O (RFP/RFN), hardware-assisted PAN filtering, -100 dBm RX sensitivity, 3.5 dBm TX output, and support for 250 kb/s to 2 Mb/s data rates in ISM band systems.
Technical Context
The ATMEGA2564RFR2-ZU integrates an enhanced RISC AVR core with a fractional-N PLL synthesizer, DSSS baseband processor, and hardware MAC engine supporting auto-acknowledge, auto-retry, and 32-bit IEEE 802.15.4 symbol counter. Its dual-oscillator system uses external 16 MHz crystal for transceiver timing and 32.768 kHz crystal for low-power RTC and MAC symbol counting.
All analog and digital supplies are internally regulated (AVDD/DVDD derived from EVDD/DEVDD), with dedicated AVSS_RFP/AVSS_RFN ground pins for RF integrity. The device implements six software-selectable power modes-including Deep Sleep (<700 nA), RX_ON (6.0 mA), and BUSY_TX (18.6 mA)-with leakage-optimized design enabling multi-year operation on coin-cell batteries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | AVR 8-bit RISC with 135 instructions; most execute in single cycle; 32×8 general-purpose registers + 2-cycle hardware multiplier. |
| Flash / EEPROM / SRAM | 256 KB ISP Flash (10k write/erase cycles @125°C); 8 KB EEPROM (20k cycles @125°C); 32 KB internal SRAM. |
| Transceiver Performance | 2.4 GHz ISM band; -100 dBm RX sensitivity; up to +3.5 dBm TX output; supports 250 kb/s, 500 kb/s, 1 Mb/s, and 2 Mb/s data rates. |
| Power Consumption | CPU active @16 MHz: 4.1 mA; RX_ON: 6.0 mA; BUSY_TX (max power): 18.6 mA; Deep Sleep: <700 nA @25°C. |
| ADC & Timers | 10-bit, 8-channel ADC (330 ks/s, differential input with programmable gain); six flexible Timer/Counters including 32-bit T/C; Real Time Counter with separate oscillator. |
| Supply & Temp Range | 1.8–3.6 V operation; industrial temperature range: -40°C to +125°C; integrated voltage regulators for AVDD/DVDD generation. |
| Security & Compliance | Hardware AES-128 engine; true random number generator; IEEE 802.15.4-2011/2006/2003 and ZigBee Pro certified; JTAG debug interface (IEEE 1149.1). |
Pinout & Package
ATMEGA2564RFR2-ZU is housed in a RoHS-compliant 48-pad QFN package (7×7 mm, 0.5 mm pitch) with exposed thermal pad internally connected to AVSS. The center metal pad must be soldered to PCB ground for mechanical stability and thermal performance; leaving it unconnected risks delamination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O port terminals | 100 Ω differential interface for 2.4 GHz transceiver; requires external balun for single-ended antenna connection. |
| AVSS_RFP / AVSS_RFN | Dedicated RF ground returns | Isolated analog ground paths minimize coupling between RF and digital domains; must be routed separately to common ground plane. |
| XTAL1 / XTAL2 | 16 MHz crystal oscillator inputs | Drive external 16 MHz fundamental-mode crystal for transceiver PLL reference; trace routing must avoid digital noise sources. |
| PG3 / PG4 | 32.768 kHz crystal oscillator inputs | Connect low-power 32.768 kHz crystal for MAC symbol counter and asynchronous timer; total shunt capacitance ≤15 pF. |
| PE0 / PE1 | USART0 RXD0 / TXD0 | Primary serial interface for host communication or bootloader; supports full-duplex asynchronous operation at configurable baud rates. |
| PD0 / PD1 | Two-wire Serial Interface (TWI) | Compatible with I²C protocol; used for sensor interfacing or peripheral configuration without consuming USART resources. |
| RSTN | Active-low reset input | Asynchronous reset assertion ≥2.5 µs guarantees full chip initialization; compatible with pushbutton or supervisor IC reset signals. |
| TST | Test mode enable | Must be tied low during normal operation; floating state may cause undefined behavior or excessive current draw. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware MAC Acceleration | Offloads IEEE 802.15.4 frame handling: SFD detection, CRC-16 computation, auto-acknowledge, auto-retry, and 32-bit symbol counter-reducing CPU load and latency. |
| Antenna Diversity Support | Enables dynamic RF path selection between multiple antennas via firmware control, improving link reliability in multipath environments without external switches. |
| Multi-PAN Address Filtering | Hardware filters incoming frames against up to eight PAN IDs and 64 short addresses, eliminating CPU overhead for network-layer packet rejection. |
| Integrated Security Engine | AES-128 encryption/decryption and true random number generation executed in dedicated hardware-no software timing side-channel exposure. |
| Ultra-Low Deep Sleep Mode | Disables all major digital blocks while retaining watchdog timer, MAC symbol counter, and 32.768 kHz oscillator-enabling sub-microamp wake-up capable of years-long battery life. |
Applications
| ZigBee Network Coordinator | Smart Metering Hub |
|---|---|
Use Scenario: Central node managing large-scale ZigBee Pro mesh networks with hundreds of end devices in utility infrastructure. IC Role / Device Role / Timing Role: Full Function Device (FFD) executing network formation, routing, security key distribution, and time-synchronized beacon scheduling. Use Value: Hardware MAC and 256 KB Flash enable robust stack implementation with minimal RAM footprint; -100 dBm sensitivity ensures reliable long-range backhaul links. |
Use Scenario: AMI (Advanced Metering Infrastructure) concentrator collecting consumption data from residential gas/water/electric meters over IEEE 802.15.4g sub-GHz or 2.4 GHz bands. IC Role / Device Role / Timing Role: Secure data aggregation node performing AES-encrypted payload assembly, timestamping via RTC, and scheduled upstream transmission. Use Value: Integrated AES engine and true RNG meet ANSI C12.22 and DLMS/COSEM security requirements; deep sleep current <700 nA extends battery backup to >10 years. |
| Industrial Sensor Gateway | WirelessHART Adapter |
Use Scenario: Edge gateway connecting legacy RS-485 Modbus sensors to cloud platforms via secure TLS-over-6LoWPAN tunnels. IC Role / Device Role / Timing Role: Protocol translator with dual-stack capability (ZigBee/IP and 6LoWPAN), leveraging hardware TCP/IP offload and IPv6 header compression. Use Value: 33 GPIO and dual USARTs allow concurrent sensor polling and wireless uplink; 32 KB SRAM accommodates fragmented IPv6 packet buffering. |
Use Scenario: Field-mounted adapter converting HART 4–20 mA loop signals into WirelessHART packets for plant-wide asset monitoring. IC Role / Device Role / Timing Role: Time-synchronized TDMA scheduler coordinating channel hopping and slot assignment per WirelessHART Class 1 timing requirements. Use Value: Hardware symbol counter and precise 32.768 kHz oscillator ensure ±50 ppm timing accuracy across temperature; RFN/RFP differential pair minimizes EMI in noisy industrial zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2.4 GHz wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA1284RFR2-ZU | 128 KB Flash, 4 KB EEPROM, 16 KB SRAM; identical QFN48 pinout and RF subsystem; lower memory capacity. | Suitable for reduced-function routers or smaller mesh networks where full 256 KB Flash is unnecessary. | Select when cost-sensitive deployments require same RF performance but reduced code/data storage needs. |
| CC2652R1F | ARM Cortex-M4F core, 352 KB Flash, integrated BLE 5.0 + IEEE 802.15.4 MAC; different architecture, no AVR instruction set compatibility. | Targeted at BLE/Thread/ZigBee multi-protocol stacks; lacks native AVR toolchain support and legacy code portability. | Choose for new designs prioritizing multi-protocol flexibility and higher processing throughput over AVR ecosystem continuity. |
Compared with ATMEGA2564RFR2-ZU, ATMEGA1284RFR2-ZU offers identical RF performance and pin compatibility at lower memory cost, while CC2652R1F provides broader protocol support and ARM-based scalability-but requires full firmware re-architecture and new toolchain adoption.
Availability
ATMEGA2564RFR2-ZU is available at Aetrix Electronics and suitable for ZigBee Pro coordinator nodes, smart metering hubs, and industrial sensor gateways requiring stable component supply, long-lifecycle assurance, and qualified sourcing for industrial-grade deployment.
Supply support for ATMEGA2564RFR2-ZU 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 product support, documentation, and manufacturing continuity for the AVR wireless MCU portfolio.
The ATMEGA2564RFR2-ZU belongs to the Atmel RFR2 family-designed specifically for ultra-low-power, standards-compliant 2.4 GHz mesh networking in utility, industrial, and building automation applications.
FAQ
What is the maximum transmit output power of the ATMEGA2564RFR2-ZU?
The ATMEGA2564RFR2-ZU achieves up to +3.5 dBm TX output power in the 2.4 GHz ISM band. This value is measured under specified conditions with optimized matching network and represents the highest RF power level supported by the integrated transceiver amplifier-enabling extended range in line-of-sight deployments without external PA stages.
Does the ATMEGA2564RFR2-ZU support hardware AES encryption?
Yes, the ATMEGA2564RFR2-ZU includes a dedicated hardware AES-128 engine and true random number generator. These peripherals operate independently of the AVR CPU, allowing secure key derivation, packet encryption/decryption, and authentication without exposing keys in software memory-meeting FIPS 140-2 Level 1 cryptographic requirements for ZigBee Pro and WirelessHART implementations.
What crystal frequencies are required for the ATMEGA2564RFR2-ZU?
The ATMEGA2564RFR2-ZU requires two crystals: a 16 MHz fundamental-mode crystal on XTAL1/XTAL2 for transceiver PLL reference, and a 32.768 kHz tuning-fork crystal on PG3/PG4 for low-power RTC and IEEE 802.15.4 symbol timing. Load capacitance for the 16 MHz crystal is typically 12 pF; total shunt capacitance for the 32.768 kHz crystal must not exceed 15 pF.
How many GPIO pins does the ATMEGA2564RFR2-ZU provide?
The ATMEGA2564RFR2-ZU provides 33 programmable I/O lines across Ports B, D, E, F, and G. Port E6, Port F3/F4 shared pin, Port G0/G2/G5, and AREF are not physically bonded out in the QFN48 package-leaving 33 usable GPIOs with full alternate function support including UART, SPI, TWI, PWM, and ADC inputs.
What is the deep sleep current specification for the ATMEGA2564RFR2-ZU?
The ATMEGA2564RFR2-ZU achieves <700 nA deep sleep current at 25°C with watchdog timer, MAC symbol counter, and 32.768 kHz oscillator enabled. This ultra-low leakage state disconnects non-essential digital blocks while preserving critical timing and wake-up functionality-making it ideal for battery-powered endpoints requiring multi-year operational life on primary cells.
ATMEGA2564RFR2-ZU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4
- Protocol:
- Zigbee®
- Modulation:
- O-QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 3.5dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 256kB Flash, 8kB EEPROM, 32kB SRAM
- Serial Interfaces:
- I2C, JTAG, SPI, USART
- GPIO:
- 32
- 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:
- 48-QFN (7x7)
ATMEGA2564RFR2-ZU FAQ
1.How can I place an order for ATMEGA2564RFR2-ZU through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA2564RFR2-ZU 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 ATMEGA2564RFR2-ZU reliable?
The price and inventory of ATMEGA2564RFR2-ZU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA2564RFR2-ZU is usually 5 days.
3.What payment methods are accepted for ATMEGA2564RFR2-ZU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA2564RFR2-ZU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA2564RFR2-ZU?
ATMEGA2564RFR2-ZU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA2564RFR2-ZU 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 ATMEGA2564RFR2-ZU?
For technical support, including ATMEGA2564RFR2-ZU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA2564RFR2-ZU requirements.
6.How does Aetrix verify that ATMEGA2564RFR2-ZU is sourced from the original manufacturer or authorized distributors?
All ATMEGA2564RFR2-ZU 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 ATMEGA2564RFR2-ZU meets industry standards.
7.What is the process for return or replacement of ATMEGA2564RFR2-ZU?
All ATMEGA2564RFR2-ZU units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA2564RFR2-ZU, 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 ATMEGA2564RFR2-ZU part is unused and in its original packaging.
Return procedure for ATMEGA2564RFR2-ZU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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