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Microchip Technology ATMEGA1284RFR2-ZUR
- Part No.:
- ATMEGA1284RFR2-ZUR
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA1284RFR2-ZUR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
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Product details
Overview
ATMEGA1284RFR2-ZUR from Microchip Technology (formerly Atmel) is an integrated 8-bit AVR microcontroller with a fully embedded 2.4 GHz IEEE 802.15.4/ZigBee transceiver in a single QFN48 package. It delivers 128 KB Flash, 4 KB EEPROM, 16 KB SRAM, 33 programmable I/O lines, and operates from 1.8–3.6 V. It targets low-power wireless sensor nodes and mesh network routers requiring concurrent MCU execution and robust RF communication.
For engineers reviewing the ATMEGA1284RFR2-ZUR datasheet, ATMEGA1284RFR2-ZUR pinout, ATMEGA1284RFR2-ZUR application, or ATMEGA1284RFR2-ZUR equivalent, key selection criteria include its integrated transceiver's -100 dBm RX sensitivity, hardware-accelerated MAC, AES security engine, 32-bit symbol counter, and support for 250 kb/s to 2 Mb/s data rates in the 2.4 GHz ISM band.
Technical Context
The ATMEGA1284RFR2-ZUR integrates an enhanced RISC AVR core with a fully featured 2.4 GHz DSSS transceiver on a monolithic die. Its architecture includes a fractional-N PLL synthesizer with 5 MHz/500 kHz channel spacing, hardware-assisted PAN address filtering, auto-acknowledge/auto-retry MAC, and dedicated 128-byte TX/RX frame buffers.
It supports seven ADC input channels (10-bit, 330 ks/s), two USARTs, SPI, TWI, RTC with 32.768 kHz oscillator, and six software-selectable power modes-including Deep Sleep at <700 nA-enabled by internal voltage regulation and separate analog/digital supply domains (EVDD/DEVDD, AVSS_RFP/AVSS_RFN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | AVR 8-bit RISC with 135 instructions; most execute in one cycle; 32 general-purpose registers; 16 MIPS @ 16 MHz, 1.8 V |
| Flash / EEPROM / SRAM | 128 KB ISP Flash (10k write/erase cycles @ 125°C); 4 KB EEPROM (20k cycles @ 125°C); 16 KB SRAM |
| RF Performance | -100 dBm RX sensitivity; +3.5 dBm max TX output; 250 kb/s to 2 Mb/s data rates; hardware CRC-16 and SFD detection |
| Power Consumption | CPU Active (16 MHz): 4.1 mA; RX_ON: 6.0 mA; TX (max power): 14.5 mA; Deep Sleep: <700 nA @ 25°C |
| ADC & Timers | 10-bit, 8-channel ADC (330 ks/s); Real Time Counter; six flexible Timer/Counters with PWM; 32-bit Timer/Counter |
| Supply & Temp Range | 1.8–3.6 V operation; industrial temperature range: -40°C to +125°C; QFN48 (7×7 mm) RoHS-compliant package |
| Security & Clocking | Hardware AES-128 engine; true random number generator; integrated 16 MHz and 32.768 kHz oscillators (external crystals required) |
Pinout & Package
ATMEGA1284RFR2-ZUR uses a 48-pin QFN (7×7 mm, RoHS-compliant) with exposed thermal pad internally connected to AVSS. The package provides 33 programmable I/O lines across Ports B, D, E, F, and G, plus dedicated RF (RFP/RFN), crystal (XTAL1/XTAL2), and supply pins (EVDD, DEVDD, AVDD, DVDD, AVSS, DVSS, AVSS_RFP, AVSS_RFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O port | 100 Ω differential interface for 2.4 GHz transceiver; requires external balun for single-ended antenna connection |
| XTAL1 / XTAL2 | 16 MHz crystal oscillator terminals | Drive external 16 MHz crystal for transceiver reference clock; layout critical for frequency stability in high-data-rate modes |
| PG3 / PG4 | 32.768 kHz crystal terminals | Connect external 32.768 kHz crystal for low-power RTC and IEEE 802.15.4 symbol counter; total shunt capacitance ≤15 pF |
| PE0 / PE1 | USART0 RXD0 / TXD0 | Primary serial interface for bootloader, debug, or host communication; supports asynchronous full-duplex operation |
| PD0 / PD1 | Two-wire Serial Interface (TWI) | Compatible with I²C protocol; used for sensor interfacing or peripheral control without additional UART resources |
| PF0–PF2, PF5–PF7 | ADC0–ADC7 inputs | Seven single-ended ADC channels (10-bit, 330 ks/s); AVDD as reference; no AREF pin exposed in QFN48 package |
| RSTN | Active-low reset input | Asynchronous reset assertion ≥ minimum pulse width required; resets CPU, peripherals, and transceiver state machine |
| TST | Test mode enable | Must be tied low if unused; enables JTAG boundary-scan and on-chip debug; floating state may cause instability |
Key Features
| Feature | Design Value |
|---|---|
| Hardware MAC Acceleration | Auto-acknowledge, auto-retry, and 32-bit IEEE 802.15.4 symbol counter offload protocol stack processing from CPU |
| Integrated Security Engine | Dedicated AES-128 block cipher accelerator and true random number generator enable secure key exchange and encrypted payload handling |
| Dual-Crystal Oscillator Support | Separate 16 MHz (transceiver timing) and 32.768 kHz (low-power RTC/symbol counter) crystal interfaces minimize sleep-mode current |
| RF Power Optimization | TX spectrum side-lobe suppression and configurable output power reduce interference and extend battery life in duty-cycled applications |
| Multi-Voltage Domain Isolation | Dedicated EVDD/DEVDD supplies and AVSS_RFP/AVSS_RFN grounds isolate RF analog noise from digital logic and MCU core |
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 hardware MAC, AES encryption, and 32-bit symbol counter for time-synchronized reporting. Use Value: Enables multi-year battery life using Deep Sleep (<700 nA) between transmissions while maintaining network routing capability. |
Use Scenario: Indoor lighting control hub aggregating commands from multiple end devices and forwarding to central gateway. IC Role / Device Role / Timing Role: Network coordinator/router executing ZigBee Pro stack with hardware-assisted PAN filtering and frame buffering. Use Value: Reduces MCU load and latency via hardware CRC, auto-ack, and 128-byte TX/RX buffers-critical for real-time lighting response. |
| Industrial Sensor Gateway | Wireless Building Automation |
|
Use Scenario: Factory-floor vibration/temperature node relaying data to edge controller over IEEE 802.15.4 mesh. IC Role / Device Role / Timing Role: Low-power end-node with 10-bit ADC, hardware AES, and 250 kb/s DSSS link for reliable short-range telemetry. Use Value: Eliminates external transceiver and security IC, reducing BOM cost and PCB area while meeting industrial -40°C to +125°C requirements. |
Use Scenario: HVAC zone controller wirelessly receiving occupancy and temperature inputs from wall-mounted sensors. IC Role / Device Role / Timing Role: Reduced Function Device (RFD) with hardware timer-based wake-up and sub-1 µA 32.768 kHz oscillator for precise scheduling. Use Value: Achieves deterministic low-latency polling using hardware symbol counter and asynchronous timer-no software timing drift. |
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 |
|---|---|---|---|
| ATMEGA2564RFR2-ZUR | 256 KB Flash, 8 KB EEPROM, 32 KB SRAM; higher memory for complex ZigBee Pro stacks | Suitable for large network coordinators and routers requiring extensive routing tables and OTA update storage | Select when firmware size exceeds 128 KB or when extended EEPROM/SRAM is needed for logging or caching |
| ATMEGA644RFR2-ZUR | 64 KB Flash, 2 KB EEPROM, 8 KB SRAM; identical RF performance and pinout | Optimized for simple end-nodes with minimal protocol stack footprint and sensor-only functionality | Choose for cost-sensitive, battery-constrained endpoints where full MCU resources are unnecessary |
Compared with ATMEGA2564RFR2-ZUR and ATMEGA644RFR2-ZUR, the ATMEGA1284RFR2-ZUR offers balanced memory (128 KB Flash/4 KB EEPROM/16 KB SRAM) ideal for mid-tier ZigBee routers-supporting full network layer implementation without over-provisioning silicon or cost.
Availability
ATMEGA1284RFR2-ZUR is available at Aetrix Electronics and suitable for smart metering, industrial sensor networks, building automation, and wireless lighting control requiring stable component supply and long-term lifecycle support.
Supply support for ATMEGA1284RFR2-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 acquired Atmel in 2016 and maintains full support for the AVR wireless MCU portfolio. Atmel pioneered highly integrated RF+MCU solutions for low-power IoT applications.
The ATMEGA1284RFR2-ZUR belongs to the ATmegaRFR2 family, designed specifically for IEEE 802.15.4 and ZigBee-compliant wireless embedded systems requiring co-integrated processing, security, and radio in a single chip.
FAQ
What is the maximum transmit output power of the ATMEGA1284RFR2-ZUR?
The ATMEGA1284RFR2-ZUR achieves up to +3.5 dBm TX output power in the 2.4 GHz ISM band. This value is measured under specified conditions with optimal matching network and is supported by hardware TX spectrum side-lobe suppression to meet regulatory spectral mask requirements. The actual output level is configurable in firmware and depends on antenna matching and supply voltage.
Does the ATMEGA1284RFR2-ZUR require external crystals?
Yes, the ATMEGA1284RFR2-ZUR requires two external crystals: a 16 MHz crystal connected to XTAL1/XTAL2 for the transceiver's reference clock, and a 32.768 kHz crystal connected to PG3/PG4 for the low-power RTC and IEEE 802.15.4 symbol counter. Neither oscillator is fully internal-the device integrates the oscillator circuitry but relies on external crystals for frequency accuracy and stability.
How many ADC channels does the ATMEGA1284RFR2-ZUR support?
The ATMEGA1284RFR2-ZUR supports seven single-ended ADC input channels (ADC0–ADC7), mapped to PF0–PF2 and PF5–PF7. The AREF pin is not exposed in the QFN48 package; AVDD serves as the ADC reference voltage. Differential input with programmable gain is not available in this package variant due to pin count constraints.
Is the ATMEGA1284RFR2-ZUR pin-compatible with other ATmegaRFR2 variants?
Yes, the ATMEGA1284RFR2-ZUR is pin-compatible with ATMEGA2564RFR2-ZUR and ATMEGA644RFR2-ZUR in the QFN48 package. All share identical pinout, supply domains, RF interface (RFP/RFN), crystal connections, and peripheral mappings. Memory size differences do not affect physical or electrical compatibility-only firmware image size and runtime resource allocation differ.
What power-saving modes are available on the ATMEGA1284RFR2-ZUR?
The ATMEGA1284RFR2-ZUR offers six software-selectable power modes: Idle, Power-down, Power-save, ADC Noise Reduction, Standby, and Extended Standby. Deep Sleep mode draws <700 nA at 25°C and retains only the watchdog timer, MAC symbol counter, and 32.768 kHz oscillator-enabling ultra-long battery life in intermittently active wireless sensor applications.
ATMEGA1284RFR2-ZUR 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-QFN (7x7)
ATMEGA1284RFR2-ZUR FAQ
1.How can I place an order for ATMEGA1284RFR2-ZUR through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA1284RFR2-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 ATMEGA1284RFR2-ZUR reliable?
The price and inventory of ATMEGA1284RFR2-ZUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA1284RFR2-ZUR is usually 5 days.
3.What payment methods are accepted for ATMEGA1284RFR2-ZUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA1284RFR2-ZUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA1284RFR2-ZUR?
ATMEGA1284RFR2-ZUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA1284RFR2-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 ATMEGA1284RFR2-ZUR?
For technical support, including ATMEGA1284RFR2-ZUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA1284RFR2-ZUR requirements.
6.How does Aetrix verify that ATMEGA1284RFR2-ZUR is sourced from the original manufacturer or authorized distributors?
All ATMEGA1284RFR2-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 ATMEGA1284RFR2-ZUR meets industry standards.
7.What is the process for return or replacement of ATMEGA1284RFR2-ZUR?
All ATMEGA1284RFR2-ZUR units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA1284RFR2-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 ATMEGA1284RFR2-ZUR part is unused and in its original packaging.
Return procedure for ATMEGA1284RFR2-ZUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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