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Microchip Technology ATSAMR34J18BT-I/7JX
- Part No.:
- ATSAMR34J18BT-I/7JX
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 64-TFBGA
- Datasheet:
-
ATSAMR34J18BT-I/7JX.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 64TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:5,551
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Product details
Overview
ATSAMR34J18BT-I/7JX from Microchip Technology is an ultra-low-power System-in-Package (SiP) microcontroller integrating a 32-bit ARM Cortex-M0+ CPU (48 MHz), 256 KB Flash, 32 KB SRAM, 8 KB low-power SRAM, and a LoRa®/FSK UHF transceiver covering 137–1020 MHz with +20 dBm max output power. It supports USB 2.0 Full-Speed interface and operates from 1.8V–3.6V across –40°C to +85°C for battery-powered remote sensor nodes.
For engineers reviewing the ATSAMR34J18BT-I/7JX datasheet, ATSAMR34J18BT-I/7JX pinout, ATSAMR34J18BT-I/7JX application, or ATSAMR34J18BT-I/7JX equivalent, key selection considerations include integrated LoRa transceiver bandwidth (tri-band sub-GHz), USB-enabled firmware update capability, SleepWalking peripheral wake-up, RF sensitivity down to –136 dBm (LoRaWAN™), and 27 GPIOs in 6×6 mm TFBGA package.
Technical Context
The ATSAMR34J18BT-I/7JX implements a tightly coupled SiP architecture where the ARM Cortex-M0+ MCU communicates with the LoRa transceiver via SERCOM4 (dedicated SPI interface), enabling deterministic packet handling with hardware CRC and automatic frequency control (AFC). Its dual-clock domain includes DFLL48M and FDPLL96M for dynamic voltage/frequency scaling across PL0/PL2 performance levels.
RF subsystem features tri-band coverage (137–175 MHz / 410–525 MHz / 862–1020 MHz), programmable PA_BOOST/RFO_HF/RFI_HF paths, and robust front-end with IIp3 = –11 dBm and blocking immunity optimized for industrial LoRaWAN gateways and end-node repeaters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0+, 48 MHz max - delivers 2.46 CoreMark/MHz for efficient LoRa protocol stack execution |
| Memory | 256 KB Flash + 32 KB SRAM + 8 KB LP-SRAM - enables full LoRaWAN Class A/C stack with OTA updates and retained state in backup mode |
| Transceiver Bands | 137–175 MHz / 410–525 MHz / 862–1020 MHz - supports global LoRa regional parameters without external band-switching circuitry |
| Max RF Output | +20 dBm (100 mW) - achieves >168 dB link budget for multi-kilometer rural sensor telemetry |
| RF Sensitivity | –136 dBm (LoRaWAN™) - ensures reliable reception at SF12/125 kHz in noisy industrial environments |
| USB Interface | Full-Speed (12 Mbps) USB 2.0 - enables direct PC-based provisioning, secure bootloader updates, and HID-class device emulation |
| Supply Range | 1.8 V–3.6 V - compatible with single-cell LiSOCl₂, LiMnO₂, or 2×AA alkaline battery systems |
Pinout & Package
ATSAMR34J18BT-I/7JX uses a 64-ball 6×6 mm TFBGA package (7JX) with 27 programmable I/O pins, dedicated RF I/O (RFI_HF, RFO_HF, PA_BOOST), analog supplies (VDDANA, VR_ANA), and USB D+/D− pins (PA24/PA25). Pin functions are multiplexed per PORT configuration registers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA24 / PA25 | USB DM / DP | Full-Speed USB 2.0 differential pair - requires 90 Ω controlled impedance routing and ESD protection for host/device enumeration |
| RFO_HF / PA_BOOST | High-Frequency RF Output | Drives external matching network to +20 dBm - must be isolated from digital noise sources with dedicated GND_RF planes |
| RFI_HF | High-Frequency RF Input | Receives up to –136 dBm signals - requires 50 Ω matched antenna interface and low-noise biasing |
| VBAT_DIG / VBAT_RF | Digital & RF Battery Inputs | Independent supply domains allow separate battery monitoring and RF power gating during deep sleep |
| RESET* | Active-Low Reset | Asynchronous reset input - pulled high internally; external RC filter recommended for brown-out immunity |
Key Features
| Feature | Design Value |
|---|---|
| SleepWalking Peripheral Engine | Enables ADC, TC, or SERCOM to autonomously sample, time, or receive data in Standby mode and wake CPU only on threshold/event - cuts average current to µA range in sensor polling |
| Tri-Band LoRa Transceiver | Single-die RF coverage across all major sub-GHz ISM bands eliminates need for external band-switching SAW filters or PA modules |
| Hardware CRC-32 & Packet Engine | Offloads LoRaWAN MAC layer CRC, preamble detection, and CAD (Channel Activity Detection) - reduces CPU load by ~35% vs software-only implementation |
| USB Bootloader Support | Factory-programmed ROM bootloader allows field firmware updates over USB without JTAG/SWD - critical for deployed sensor networks |
| Configurable Custom Logic (CCL) | Three independent CCL units implement glue logic (e.g., edge-triggered interrupts, PWM gating) in hardware - avoids GPIO toggling overhead in timing-critical RF sync |
Applications
| Smart Utility Metering | Industrial Asset Tracking |
|---|---|
Use Scenario: Battery-powered gas/water meters transmitting hourly consumption data over 5–15 km to fixed gateways in rural areas. IC Role / Device Role / Timing Role: Primary SoC executing LoRaWAN Class A stack, managing AES-128 encryption, and scheduling transmissions using RTC alarm wakeup. Use Value: 20 dBm output + –136 dBm sensitivity enables single-hop transmission without repeaters; 8 KB LP-SRAM retains metering logs during 10-year battery life. | Use Scenario: Ruggedized GPS+LoRa tags on shipping containers reporting location every 6 hours across port logistics zones. IC Role / Device Role / Timing Role: Integrated MCU+RF handles GNSS UART parsing, geofence logic, and adaptive LoRa spreading factor selection based on RSSI feedback. Use Value: SleepWalking ADC monitors battery voltage; USB interface enables depot-level firmware validation before deployment - no JTAG required. |
| Agricultural Soil Monitoring | Smart Building Environmental Sensors |
Use Scenario: Solar-charged soil moisture/temperature nodes deployed in vineyards, transmitting daily aggregated data via LoRa to farm management gateways. IC Role / Device Role / Timing Role: Manages multi-channel ADC sampling, PTC-based touch calibration for enclosure integrity check, and duty-cycled RF transmission aligned to solar harvest peaks. Use Value: Tri-band support allows same BOM across EU (868 MHz) and US (915 MHz) deployments; 48 MHz CPU executes lightweight ML inference for anomaly detection. | Use Scenario: Wall-mounted CO₂/temperature/humidity sensors in office buildings, reporting to BMS via private LoRa network with local edge processing. IC Role / Device Role / Timing Role: Runs real-time air quality algorithm, drives PWM-controlled ventilation fans via TCC outputs, and synchronizes LoRa uplinks with building occupancy schedule. Use Value: Hardware-accelerated CRC and packet engine reduce transmit latency to <12 ms; USB allows IT staff to reconfigure sensor thresholds onsite without tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LoRa system-on-chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATSAMR35J18BT-I/7JX | No USB interface; identical MCU core, memory, RF specs, and pinout - removes USB PHY, DM/DP pins, and associated VREG circuitry | Suitable for cost-sensitive, non-USB field-deployed nodes where firmware updates occur via UART or OTA only | Select when USB provisioning is unnecessary and BOM cost reduction is prioritized over development flexibility |
| RA4M3G20A20001B#AC0 | ARM Cortex-M4F (100 MHz), 1 MB Flash, no integrated RF - requires external SX126x LoRa transceiver via SPI; larger 100-pin LQFP package | Better suited for complex edge AI or gateway applications needing higher compute headroom and dual-band RF expansion | Select when >48 MHz CPU performance, larger code space, or multi-protocol RF (LoRa + BLE/Wi-Fi coexistence) is required |
Compared with ATSAMR34J18BT-I/7JX, ATSAMR35J18BT-I/7JX reduces system cost and layout complexity by removing USB but sacrifices field-serviceability; RA4M3G20A20001B#AC0 offers superior processing for hybrid protocols but increases bill-of-materials count and PCB area by requiring discrete RF components.
Availability
ATSAMR34J18BT-I/7JX is available at Aetrix Electronics and suitable for smart utility metering, industrial asset tracking, agricultural monitoring, and smart building environmental sensing requiring stable component supply across multi-year deployments.
Supply support for ATSAMR34J18BT-I/7JX 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 Inc. is a leading provider of microcontrollers, analog devices, and connectivity solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The SAM R34 product line is designed specifically for ultra-low-power, long-range IoT end-nodes requiring integrated LoRa connectivity and secure firmware update capability - targeting battery-operated sensor networks compliant with LoRaWAN specifications.
FAQ
What is the maximum RF output power supported by the ATSAMR34J18BT-I/7JX?
The ATSAMR34J18BT-I/7JX supports a maximum RF output power of +20 dBm (100 mW) in the HF band when VDDANA exceeds 2.4 VDC. This rating applies to the RFO_HF and PA_BOOST pins and is validated per LoRa Alliance regional compliance requirements. The device also provides regulated +17 dBm and high-efficiency +13 dBm modes for optimized power-vs-range trade-offs in ATSAMR34J18BT-I/7JX designs.
Does the ATSAMR34J18BT-I/7JX include a built-in USB interface?
Yes, the ATSAMR34J18BT-I/7JX integrates a full-speed (12 Mbps) USB 2.0 interface with embedded host and device functionality, eight endpoints, and on-chip USB PHY. This enables direct connection to PCs for firmware updates, debugging, and HID-class operation - a distinguishing feature versus the USB-less ATSAMR35J18BT-I/7JX variant. The USB interface is implemented on PA24 (DM) and PA25 (DP) pins in the 64-ball TFBGA package.
What are the supported operating temperature and supply voltage ranges for the ATSAMR34J18BT-I/7JX?
The ATSAMR34J18BT-I/7JX is rated for industrial operation from –40°C to +85°C and operates across a supply voltage range of 1.8 V to 3.6 V. These specifications apply to both the MCU core (VDDCORE/VDDIN) and RF subsystem (VDDANA/VR_PA), with separate low-dropout regulators ensuring stable internal voltages. The wide voltage range supports direct integration with primary lithium batteries and energy-harvesting sources in ATSAMR34J18BT-I/7JX-based sensor nodes.
How many general-purpose I/O pins does the ATSAMR34J18BT-I/7JX provide?
The ATSAMR34J18BT-I/7JX provides 27 programmable general-purpose I/O pins, multiplexed across 12 peripheral functions (A–I) including SERCOM, TC/TCC, ADC, AC, PTC, and CCL. These pins are distributed across the 64-ball TFBGA package and support configurable pull-ups/pull-downs, slew rate control, and glitch filtering. All 27 GPIOs remain functional in Standby sleep mode when configured for wake-up events in ATSAMR34J18BT-I/7JX applications.
What LoRa modulation schemes and frequency bands does the ATSAMR34J18BT-I/7JX support?
The ATSAMR34J18BT-I/7JX supports LoRa®, (G)FSK, (G)MSK, and OOK modulation schemes. Its integrated transceiver covers three licensed-free sub-GHz bands: 137–175 MHz, 410–525 MHz, and 862–1020 MHz - enabling global deployment without hardware changes. Band selection is software-configurable via register settings, and LoRaWAN regional parameters (e.g., EU868, US915) are supported through certified stack implementations for ATSAMR34J18BT-I/7JX.
ATSAMR34J18BT-I/7JX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-TFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4
- Protocol:
- LoRa™
- Modulation:
- FSK, GFSK, GMSK, MSK, OOK
- Frequency:
- 137MHz ~ 175MHz, 410MHz ~ 525MHz, 862MHz ~ 1.02GHz
- Data Rate (Max):
- -
- Power - Output:
- 20dBm
- Sensitivity:
- -148dBm
- Memory Size:
- 256kB Flash, 32kB SRAM
- Serial Interfaces:
- I2S, SPI, USART, USB
- GPIO:
- 27
- Voltage - Supply:
- 1.8V ~ 3.63V
- Current - Receiving:
- 14.8mA ~ 15.8mA
- Current - Transmitting:
- 32.5mA ~ 94.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-TFBGA (6x6)
ATSAMR34J18BT-I/7JX FAQ
1.How can I place an order for ATSAMR34J18BT-I/7JX through Aetrix?
Please submit a Request for Quotation (RFQ) for ATSAMR34J18BT-I/7JX 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 ATSAMR34J18BT-I/7JX reliable?
The price and inventory of ATSAMR34J18BT-I/7JX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATSAMR34J18BT-I/7JX is usually 5 days.
3.What payment methods are accepted for ATSAMR34J18BT-I/7JX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATSAMR34J18BT-I/7JX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATSAMR34J18BT-I/7JX?
ATSAMR34J18BT-I/7JX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATSAMR34J18BT-I/7JX 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 ATSAMR34J18BT-I/7JX?
For technical support, including ATSAMR34J18BT-I/7JX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATSAMR34J18BT-I/7JX requirements.
6.How does Aetrix verify that ATSAMR34J18BT-I/7JX is sourced from the original manufacturer or authorized distributors?
All ATSAMR34J18BT-I/7JX 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 ATSAMR34J18BT-I/7JX meets industry standards.
7.What is the process for return or replacement of ATSAMR34J18BT-I/7JX?
All ATSAMR34J18BT-I/7JX units undergo pre-shipment inspection (PSI). If there is an issue with ATSAMR34J18BT-I/7JX, 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 ATSAMR34J18BT-I/7JX part is unused and in its original packaging.
Return procedure for ATSAMR34J18BT-I/7JX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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