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Microchip Technology ATMEGA1284RFR2-ZFR
- Part No.:
- ATMEGA1284RFR2-ZFR
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA1284RFR2-ZFR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
ATMEGA1284RFR2-ZFR from Microchip Technology (formerly 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 128 KB Flash, 4 KB EEPROM, 16 KB SRAM, 33 programmable I/O lines, and operates from 1.8–3.6 V across –40°C to +125°C. It targets low-power wireless sensor nodes and mesh network routers in industrial automation and smart metering.
For engineers reviewing the ATMEGA1284RFR2-ZFR datasheet, ATMEGA1284RFR2-ZFR pinout, ATMEGA1284RFR2-ZFR application, or ATMEGA1284RFR2-ZFR equivalent, key selection criteria include its integrated MAC hardware acceleration, -100 dBm RX sensitivity, 3.5 dBm TX output power, 250–2000 kb/s data rate support, and QFN48 package with dedicated RF differential I/O pins (RFP/RFN).
Technical Context
The ATMEGA1284RFR2-ZFR combines an enhanced RISC CPU executing 135 instructions-most in one cycle-with a fully integrated 2.4 GHz transceiver featuring hardware-assisted MAC, AES encryption engine, true random number generator, and 32-bit IEEE 802.15.4 symbol counter. Its dual-oscillator system uses external 16 MHz crystal for radio timing and 32.768 kHz crystal for low-power asynchronous timer and MAC symbol counting.
Power management includes six software-selectable sleep modes, with Deep Sleep consuming <700 nA at 25°C while retaining watchdog, MAC symbol counter, and 32.768 kHz oscillator operation. The transceiver supports antenna diversity control, 128-byte TX/RX frame buffers, and hardware CRC-16 computation-enabling robust, deterministic packet handling without CPU intervention.
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 / EEPROM / SRAM | 128 KB / 4 KB / 16 KB - enables full ZigBee stack plus application code in single-chip solution |
| Radio Data Rates | 250, 500 kb/s, 1, 2 Mb/s - supports IEEE 802.15.4 O-QPSK PHY and proprietary high-throughput modes |
| RX Sensitivity / TX Power | -100 dBm / up to +3.5 dBm - provides >100 m range in typical indoor mesh deployments |
| Supply Current (Active) | 10.1 mA (AVR + transceiver RX_ON) @ 3.0 V - enables multi-year battery life in duty-cycled sensor nodes |
| Deep Sleep Current | <700 nA @ 25°C - preserves battery during extended idle periods while maintaining MAC symbol counter |
| Operating Voltage / Temp | 1.8–3.6 V / –40°C to +125°C - suitable for unregulated battery and harsh industrial environments |
| ADC Resolution / Channels | 10-bit, 7-channel single-ended - supports analog sensor interfacing without external signal conditioning |
Pinout & Package
ATMEGA1284RFR2-ZFR is housed in a RoHS-compliant 48-pad QFN package (7×7 mm), with exposed thermal pad internally connected to AVSS. The package supports full peripheral functionality including two USARTs, SPI, TWI, 6 PWM channels, RTC, and hardware AES engine. Dedicated RF pins (RFP, RFN, AVSS_RFP, AVSS_RFN) require controlled-impedance routing and proper RF grounding per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O | 100 Ω differential port requiring balun for 50 Ω single-ended antenna interface |
| AVSS_RFP / AVSS_RFN | Dedicated RF Ground | Separate analog ground return paths minimize coupling between digital and RF sections |
| XTAL1 / XTAL2 | 16 MHz Transceiver Clock | Drives fractional-N PLL synthesizer; requires low-parasitic 16 MHz crystal and matched load capacitors |
| PG3 / PG4 | 32.768 kHz Crystal Interface | Connects to low-power oscillator for MAC symbol counter and asynchronous timer in deep sleep |
| PE0 / PE1 | USART0 RX/TX | Primary debug and host interface; supports bootloader programming and serial diagnostics |
| PD0 / PD1 | TWI (I²C) Bus | Enables connection to external sensors, EEPROMs, or power management ICs using standard 2-wire protocol |
Key Features
| Feature | Design Value |
|---|---|
| Hardware MAC Acceleration | Auto-acknowledge, auto-retry, SFD detection, and frame buffering reduce CPU overhead to <5% during burst traffic |
| Integrated AES-128 Engine | Full-duplex encryption/decryption offloads security processing from main CPU, enabling secure ZigBee cluster-key handling |
| Dual-Crystal Oscillator Support | Independent 16 MHz (radio) and 32.768 kHz (low-power timing) crystals enable simultaneous high-speed comms and ultra-low-power sleep |
| Multiple Low-Power Sleep Modes | Deep Sleep mode retains MAC symbol counter and watchdog with <700 nA draw-critical for time-synchronized mesh networks |
| RF Performance Optimization | TX spectrum side-lobe suppression and hardware spreading/despreading meet FCC/ETSI spectral mask requirements without external filtering |
| GPIO Flexibility | 33 programmable I/O lines with configurable pull-ups, alternate functions, and JTAG debugging support simplify board design and field firmware updates |
Applications
| Smart Utility Metering | ZigBee Router Node |
|---|---|
Use Scenario: Battery-powered gas/water meters transmitting consumption data hourly via mesh network to concentrator. IC Role / Device Role / Timing Role: Full-function ZigBee router with integrated MAC, AES, and real-time symbol counter for synchronized beacon intervals. Use Value: Eliminates external transceiver and security IC, reducing BOM cost by $1.20 and PCB area by 22 mm² while meeting ANSI C12.18 and DLMS/COSEM compliance. | Use Scenario: Industrial gateway node aggregating sensor data from 30+ end devices in factory floor wireless mesh. IC Role / Device Role / Timing Role: Network coordinator managing PAN formation, channel selection, and secure key distribution using hardware AES and MAC timers. Use Value: Hardware-accelerated frame handling sustains 98% channel utilization at 250 kb/s without packet loss, enabling deterministic latency under 15 ms. |
| Wireless Sensor Network Edge Node | 6LoWPAN Border Router |
Use Scenario: Temperature/humidity sensor node deployed in HVAC ducts with 10-year battery life target. IC Role / Device Role / Timing Role: End-device running lightweight ZigBee stack; leverages Deep Sleep + 32.768 kHz oscillator for precise wake-up scheduling. Use Value: <700 nA deep sleep current extends CR2032 battery life beyond 10 years at 1-minute reporting interval. | Use Scenario: IPv6-capable edge device bridging IEEE 802.15.4 mesh to Ethernet/Wi-Fi backbone in building automation. IC Role / Device Role / Timing Role: Dual-role processor executing 6LoWPAN header compression and ZigBee APS layer with hardware CRC-16 validation. Use Value: On-the-fly packet translation reduces MCU processing load by 40%, allowing concurrent TLS handshake and routing table maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA2564RFR2-ZUR | 256 KB Flash, 8 KB EEPROM, 32 KB SRAM - double memory capacity | Suitable for full ZigBee Pro coordinator stacks with OTA update capability | Select when application requires >128 KB code space or dual-bank firmware updates |
| ATMEGA644RFR2-ZUR | 64 KB Flash, 2 KB EEPROM, 8 KB SRAM - reduced memory and I/O count | Optimized for cost-sensitive end-node devices with minimal local processing | Select for simple sensor endpoints where ZigBee stack footprint fits in 64 KB Flash |
Compared with ATMEGA1284RFR2-ZFR, the ATMEGA2564RFR2-ZUR provides headroom for complex mesh routing and over-the-air updates, while the ATMEGA644RFR2-ZUR trades memory and peripherals for lower unit cost in disposable endpoint roles-making ATMEGA1284RFR2-ZFR the balanced choice for mid-tier coordinators and battery-powered routers.
Availability
ATMEGA1284RFR2-ZFR is available at Aetrix Electronics and suitable for industrial IoT gateways, smart utility metering systems, and wireless sensor network infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ATMEGA1284RFR2-ZFR 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. The company specializes in microcontrollers, analog, FPGA, and connectivity solutions for industrial, automotive, and consumer markets.
The ATMEGA1284RFR2-ZFR belongs to Microchip's legacy AVR RFR2 family-designed specifically for standards-compliant, low-power IEEE 802.15.4 and ZigBee mesh networking in resource-constrained embedded systems.
FAQ
What is the maximum transmit output power of the ATMEGA1284RFR2-ZFR?
The ATMEGA1284RFR2-ZFR achieves up to +3.5 dBm TX output power in the 2.4 GHz ISM band. This value is measured at the RFP/RFN differential port under specified conditions (3.0 V supply, 25°C ambient) and enables reliable communication over 100+ meters in typical indoor environments. The transceiver includes hardware TX spectrum side-lobe suppression to meet regulatory spectral mask requirements without external filtering.
Does the ATMEGA1284RFR2-ZFR support hardware AES encryption?
Yes, the ATMEGA1284RFR2-ZFR integrates a dedicated AES-128 encryption/decryption engine that operates independently of the AVR CPU. It supports ECB, CBC, and CTR modes and can process 128-bit blocks in under 100 clock cycles. This hardware acceleration enables secure ZigBee cluster-key management and encrypted payload handling without degrading real-time performance or increasing power consumption.
What crystal frequencies are required for the ATMEGA1284RFR2-ZFR?
The ATMEGA1284RFR2-ZFR requires two external crystals: a 16 MHz crystal connected to XTAL1/XTAL2 for the radio transceiver's fractional-N PLL synthesizer, and a 32.768 kHz crystal connected to PG3/PG4 for the low-power asynchronous timer and IEEE 802.15.4 symbol counter. Both crystals must be placed close to their respective pins with minimal trace length and parasitic capacitance to ensure timing accuracy and stability.
How many ADC input channels does the ATMEGA1284RFR2-ZFR provide?
The ATMEGA1284RFR2-ZFR provides seven single-ended ADC input channels (PF0–PF5, PF7) with 10-bit resolution and up to 330 ks/s sampling rate. Port F3 and F4 share a single pin, reducing the total usable ADC inputs to seven. The ADC includes an optional differential input stage with programmable gain, supporting direct interface to thermistors, RTDs, and bridge sensors without external amplification.
What sleep modes are available on the ATMEGA1284RFR2-ZFR and what is the lowest current draw?
The ATMEGA1284RFR2-ZFR offers six software-selectable power-saving modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby. Deep Sleep mode (a variant of Power-down with specific peripherals enabled) draws less than 700 nA at 25°C while retaining operation of the watchdog timer, MAC symbol counter, and 32.768 kHz oscillator-enabling precise, low-power timekeeping and scheduled wake-up in battery-operated mesh nodes.
ATMEGA1284RFR2-ZFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- O-QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 3.5dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 128kB Flash, 4kB EEPROM, 16kB 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-QFN (7x7)
ATMEGA1284RFR2-ZFR FAQ
1.How can I place an order for ATMEGA1284RFR2-ZFR through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA1284RFR2-ZFR 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 ATMEGA1284RFR2-ZFR reliable?
The price and inventory of ATMEGA1284RFR2-ZFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA1284RFR2-ZFR is usually 5 days.
3.What payment methods are accepted for ATMEGA1284RFR2-ZFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA1284RFR2-ZFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA1284RFR2-ZFR?
ATMEGA1284RFR2-ZFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA1284RFR2-ZFR 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 ATMEGA1284RFR2-ZFR?
For technical support, including ATMEGA1284RFR2-ZFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA1284RFR2-ZFR requirements.
6.How does Aetrix verify that ATMEGA1284RFR2-ZFR is sourced from the original manufacturer or authorized distributors?
All ATMEGA1284RFR2-ZFR 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 ATMEGA1284RFR2-ZFR meets industry standards.
7.What is the process for return or replacement of ATMEGA1284RFR2-ZFR?
All ATMEGA1284RFR2-ZFR units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA1284RFR2-ZFR, 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 ATMEGA1284RFR2-ZFR part is unused and in its original packaging.
Return procedure for ATMEGA1284RFR2-ZFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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