Microchip Technology ATSAMR30G18A-MU

Overview

ATSAMR30G18A-MU from Microchip Technology is an IEEE 802.15.4-2011-compliant sub-GHz System-in-Package (SiP) microcontroller integrating a 48 MHz ARM Cortex-M0+ CPU, 256 KB Flash, 32 KB SRAM, and an AT86RF212B transceiver supporting 779–787 MHz (China), 863–870 MHz (Europe), and 902–928 MHz (North America). It delivers +11 dBm TX output power and –110 dBm RX sensitivity for low-power wireless sensor networks in industrial monitoring.

For engineers reviewing the ATSAMR30G18A-MU datasheet, ATSAMR30G18A-MU pinout, ATSAMR30G18A-MU application, or ATSAMR30G18A-MU equivalent, this SiP enables rapid development of battery-powered IEEE 802.15.4 mesh nodes with hardware-accelerated MAC, AES-128 security, SleepWalking peripherals, and integrated RF front-end control-requiring no external PA/LNA biasing or RF switching logic.

Technical Context

The ATSAMR30G18A-MU combines a SAM L21 MCU die and AT86RF212B transceiver die in a single 48-pin QFN package, with internal SPI interconnect (SERCOM4) and shared clock/reset resources. Its RF subsystem supports BPSK (20/40 kbps) and O-QPSK (100–1000 kbps) per IEEE 802.15.4-2003/2006/2011, plus proprietary high-data-rate modes and FCC-compliant BPSK-40-ALT.

Power management includes domain gating, ultra-low-power SRAM retention (8 KB LP RAM), and SleepWalking peripherals that autonomously process sensor data while the CPU remains in standby (1.4 μA/MHz). The integrated 16 MHz crystal oscillator for RF and optional 32.768 kHz XOSC32K support precise timing for beacon intervals and low-power wake-up.

Key Specifications

Pinout & Package

ATSAMR30G18A-MU uses a 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad connected to GND. Pin functions are multiplexed across PORT A/B/C with dedicated RF control signals (SLP_TR, RSTN, DIG1–DIG4, FECTRL0–FECTRL5) routed internally between MCU and AT86RF212B dies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sub-GHz wireless microcontroller applications.

Compared with ATSAMR30E18A-MU, the ATSAMR30G18A-MU provides 12 additional GPIOs, full 32.768 kHz crystal support for ±20 ppm RTC accuracy, and expanded PTC for larger touch panels-making it optimal for feature-rich end-devices. Versus CC2652RB, it offers lower system-level BOM cost due to eliminated BAW and simpler RF layout, but lacks Bluetooth coexistence.

Availability

ATSAMR30G18A-MU is available at Aetrix Electronics and suitable for smart utility metering, industrial wireless sensor networks, and building automation systems requiring stable component supply, long lifecycle assurance, and consistent RF performance across global regulatory domains.

Supply support for ATSAMR30G18A-MU 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 is a leading provider of microcontrollers, analog components, and security solutions, with deep expertise in low-power wireless and embedded control.

The SAM R30 product line was designed specifically for battery-operated IEEE 802.15.4 sub-GHz IoT endpoints, integrating RF transceivers and energy-efficient MCUs to eliminate discrete RF design complexity and accelerate time-to-market.

FAQ

What is the primary RF transceiver integrated into the ATSAMR30G18A-MU?

The ATSAMR30G18A-MU integrates the AT86RF212B sub-GHz transceiver, which supports IEEE 802.15.4-2003/2006/2011 compliant BPSK and O-QPSK modulation across 779–787 MHz, 863–870 MHz, and 902–928 MHz bands. This transceiver provides hardware-accelerated MAC features including Auto-Acknowledge, CSMA-CA, and Clear Channel Assessment-all accessible via SERCOM4 SPI interface within the ATSAMR30G18A-MU SiP.

Does the ATSAMR30G18A-MU support hardware AES encryption?

Yes, the ATSAMR30G18A-MU includes a dedicated hardware AES-128 encryption/decryption engine and True Random Number Generator (TRNG), both accessible via the Peripheral Access Controller (PAC) without CPU intervention. These security peripherals operate in parallel with RF and MCU operations, enabling secure over-the-air updates and end-to-end payload protection in the ATSAMR30G18A-MU's IEEE 802.15.4 stack.

What is the operating voltage range and temperature grade of the ATSAMR30G18A-MU?

The ATSAMR30G18A-MU operates from 1.8 V to 3.6 V and is rated for the industrial temperature range of –40°C to +85°C. Its internal voltage regulators (AVREG, DVREG) provide clean 1.8 V analog and digital supplies, and the device maintains full RF performance-including –110 dBm sensitivity and +11 dBm output power-across this entire voltage and temperature envelope.

How many general-purpose I/O pins does the ATSAMR30G18A-MU provide?

The ATSAMR30G18A-MU provides 28 programmable GPIO pins, mapped across PORT A, B, and C in its 48-pin QFN package. These include dedicated RF control signals (SLP_TR, RSTN, DIG1–DIG4), analog inputs (AIN[0–7], AIN[16–19]), touch controller lines (X[0–15], Y[0–7]), and configurable SERCOM/TC/TCC peripherals-enabling flexible interface assignment without external level shifters or glue logic.

Is an external crystal required for the ATSAMR30G18A-MU RF operation?

Yes, the ATSAMR30G18A-MU requires an external 16 MHz crystal connected to PA14 (XIN) and PA15 (XOUT) to drive the AT86RF212B transceiver's PLL and ensure compliant spectral mask performance. While the device includes an integrated 16 MHz oscillator, it is not used for RF synthesis-the external crystal is mandatory for FCC/ETSI certification and stable frequency hopping operation in the ATSAMR30G18A-MU.