ATSAMR21G18-MR210UA - 2.4GHz Zigbee/802.15.4 Wireless Module | Microchip
料号： ATSAMR21G18-MR210UA ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $17.8 | $17.80 |
| 10 | $16.05 | $160.50 |
| 100 | $14.4 | $1,440.00 |
| 500 | $12.9 | $6,450.00 |
| 1,000 | $11.55 | $11,550.00 |
ATSAMR21G18-MR210UA 概述
An IEEE 802.15.4 / Zigbee transceiver module is a pre-certified radio module that combines a microcontroller, RF transceiver, antenna interface, and required passive components into a single surface-mount package. This category of module sits hierarchically above bare RF ICs and below full SoCs, occupying a sweet spot for OEMs that need a certified radio sub-system without performing the RF matching, layout, and regulatory submission tasks themselves. The ATSAMR21G18-MR210UA is a member of that family and is positioned by Microchip as a drop-in wireless connectivity building block.
Key features include the ARM Cortex-M0+ core at up to 48MHz, 256KB in-system-programmable Flash, 32KB SRAM, integrated 2.4GHz IEEE 802.15.4 radio with data rates suitable for Zigbee and Thread mesh networks, hardware crypto-authentication for secure key storage, and a serial flash for OTA firmware updates. The module supports an external power amplifier path and antenna diversity for extended range in challenging RF environments.
The ATSAMR21G18A silicon inside the module uses an ultra-low-power architecture that enables deep sleep currents typically below 1µA with RTC retention, making it suitable for battery-powered endpoints such as wireless sensors, smart locks, and connected lighting nodes. The integrated radio supports IEEE 802.15.4 MAC, Zigbee PRO stack, and Thread, all accessible through Microchip's ASF (Atmel Studio Framework) and the newer MPLAB Harmony v3 development environment.
Typical applications include Zigbee/Thread connected home devices, industrial wireless sensor networks, smart lighting controllers, building automation, and battery-powered IoT endpoints where certification time and BOM risk matter. Pairing the module with the SAM R21 Xplained Pro development kit dramatically shortens prototyping.
When integrating this module, follow the reference antenna selection list in the datasheet to maintain FCC/RED modular approval, place the host PCB keep-out region per the recommended footprint, and use the integrated crypto element for secure key provisioning rather than storing credentials in main Flash.
This page synthesizes Microchip datasheet specifications, current DigiKey pricing tiers, and a curated set of drop-in Microchip same-family alternatives that allow board-level footprint reuse without requalification.
直接替换替代料： ATSAMR21G18-MR210UA ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAMR21G18-MR210UA （相同外形与封装尺寸） ——差异在于 Module Type, Mounting Type, Antenna Interface, Core, Core Clock Speed.
快速对比工具——选择替代料号进行并排对比：
ATSAMR21G18-MR210UA
✅ 直接替换✓ 有现货
$11.55 / 个
查看数据手册 →ATSAMR21G18A-MF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAMB11-MR210CA
✅ 直接替换✓ 有现货
$6.85 / 个
查看数据手册 →ATSAMR21G18-MR210UA 规格参数（制造商发布）
| Module Type | IEEE 802.15.4 / Zigbee / Thread Transceiver Module (SiP) |
| Integrated IC | ATSAMR21G18A |
| Core | ARM Cortex-M0+ (32-bit) |
| Core Clock Speed | Up to 48 MHz |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| RF Frequency Band | 2.4 GHz (IEEE 802.15.4) |
| Supported Protocols | IEEE 802.15.4, Zigbee, Thread |
| Antenna Interface | External antenna via PCB trace / u.FL (per datasheet variant) |
| Integrated Serial Flash | Yes (external on module) |
| Hardware Crypto Authentication | Yes (integrated) |
| Module Dimensions | 20 mm × 19 mm |
| 安装类型 | Surface Mount (solder-mount footprint) |
| 引脚数量 | 48-pin SMT (per third-party catalog) |
| Regulatory Approvals | FCC, CE (RED) - per module datasheet |
| RoHS 状态 | Compliant (per product page) |
ATSAMR21G18-MR210UA 引脚配置
| 引脚 1 | GND — Ground reference |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | RESET — Module reset (active low) |
| 引脚 4 | VBAT — Battery / main supply input |
| 引脚 5 | VBAT — Battery / main supply input |
| 引脚 6 | VCC — Decoupled internal supply pin |
| 引脚 7 | VCC — Decoupled internal supply pin |
| 引脚 8 | NC — Not connected |
| 引脚 9 | NC — Not connected |
| 引脚 10 | GPIO0 — General-purpose I/O 0 |
| 引脚 11 | GPIO1 — General-purpose I/O 1 |
| 引脚 12 | GPIO2 — General-purpose I/O 2 |
| 引脚 13 | GPIO3 — General-purpose I/O 3 |
| 引脚 14 | GPIO4 — General-purpose I/O 4 |
| 引脚 15 | GPIO5 — General-purpose I/O 5 |
| 引脚 16 | GPIO6 — General-purpose I/O 6 |
| 引脚 17 | GPIO7 — General-purpose I/O 7 |
| 引脚 18 | GPIO8 — General-purpose I/O 8 |
| 引脚 19 | GPIO9 — General-purpose I/O 9 |
| 引脚 20 | GPIO10 — General-purpose I/O 10 |
| 引脚 21 | GPIO11 — General-purpose I/O 11 |
| 引脚 22 | GPIO12 — General-purpose I/O 12 |
| 引脚 23 | GPIO13 — General-purpose I/O 13 |
| 引脚 24 | GPIO14 — General-purpose I/O 14 |
| 引脚 25 | GPIO15 — General-purpose I/O 15 |
| 引脚 26 | GPIO16 — General-purpose I/O 16 |
| 引脚 27 | GPIO17 — General-purpose I/O 17 |
| 引脚 28 | SWCLK — SWD clock for programming/debug |
| 引脚 29 | SWDIO — SWD data for programming/debug |
| 引脚 30 | SWO — Serial wire trace output |
| 引脚 31 | ANT — RF antenna interface (per datasheet) |
| 引脚 32 | GND — Ground reference |
| 引脚 33 | GND — Ground reference |
| 引脚 34 | I2C_SDA — I2C data for serial flash / crypto element |
| 引脚 35 | I2C_SCL — I2C clock for serial flash / crypto element |
| 引脚 36 | UART_RX — UART receive |
| 引脚 37 | UART_TX — UART transmit |
| 引脚 38 | UART_RTS — UART request-to-send |
| 引脚 39 | UART_CTS — UART clear-to-send |
| 引脚 40 | SPI_MOSI — SPI master out, slave in |
| 引脚 41 | SPI_MISO — SPI master in, slave out |
| 引脚 42 | SPI_SCK — SPI serial clock |
| 引脚 43 | SPI_CS — SPI chip select |
| 引脚 44 | PWM0 — PWM output 0 |
| 引脚 45 | PWM1 — PWM output 1 |
| 引脚 46 | ADC0 — Analog input channel 0 |
| 引脚 47 | ADC1 — Analog input channel 1 |
| 引脚 48 | GND — Ground reference |
典型应用
ATSAMR21G18-MR210UA 适用于 6 应用s: Zigbee Wireless Sensor Nodes, Smart Home Connected Lighting, Industrial Wireless Sensor Networks, Battery-Powered IoT Endpoints, Building Automation Controllers, Thread Border Router End Nodes.
Zigbee Wireless Sensor Nodes
The ATSAMR21G18-MR210UA is a strong fit for Zigbee wireless sensor nodes because it integrates an ARM Cortex-M0+ up to 48MHz with 256KB Flash, 32KB SRAM, and a hardware crypto-authentication device in a 20mm × 19mm FCC/RED certified module, drastically lowering BOM and certification cost. Its 802.15.4 radio supports Zigbee PRO mesh routing while deep-sleep currents below 1µA extend coin-cell battery life in temperature, humidity, and occupancy sensors. Place the host PCB keep-out region per the datasheet footprint and run Microchip's ASF or Harmony v3 Zigbee stack.
推荐
Smart Home Connected Lighting
Smart lighting controllers benefit from the ATSAMR21G18-MR210UA's combination of 256KB Flash for color-mix engines, integrated crypto element for secure Zigbee 3.0 commissioning, and a regulatory-certified 2.4GHz radio. The MR210 footprint slots into LED driver PCBs already designed for the SAM R21 family, reducing time to market for Zigbee Light Link and Touchlink products. Use the external PA path if your design requires extended range across large living spaces.
推荐
Industrial Wireless Sensor Networks
Industrial condition-monitoring gateways use the ATSAMR21G18-MR210UA as a Thread or Zigbee endpoint thanks to its Cortex-M0+ with deterministic 48MHz performance and 256KB Flash that runs Microchip's Thread stack alongside sensor-processing code. The 32KB SRAM is adequate for buffering IEEE 802.15.4 packets in mesh networks; the integrated serial flash enables OTA firmware updates required in long-life factory deployments. Pair the module with an external PA for long-range links across plant floors.
推荐
Battery-Powered IoT Endpoints
Battery-powered IoT endpoints such as door/window sensors and remote controls rely on the ATSAMR21G18-MR210UA's sub-1µA deep-sleep retention and integrated crypto-authentication, which avoids the BOM cost of an external secure element. The 256KB Flash holds Zigbee Pro stack plus application code; the external serial flash lets OEMs deliver OTA updates while in field. Expect typical coin-cell life of multiple years on duty cycles below 0.1%.
推荐
Building Automation Controllers
Building automation products - HVAC dampers, occupancy controllers, smart thermostats - match the ATSAMR21G18-MR210UA's mix of 256KB Flash for application logic, 32KB SRAM for sensor fusion, and an FCC/RED-certified 2.4GHz mesh radio for Zigbee 3.0 or Thread. The hardware crypto-authentication device simplifies secure commissioning in commercial buildings where installer-friendly flows matter. Use external antenna selection from the datasheet approved list when walls attenuate the signal.
推荐
Thread Border Router End Nodes
Thread mesh end nodes deploying with mains power (smart plugs, motorized blinds) leverage the ATSAMR21G18-MR210UA's dual capability for Zigbee 3.0 or OpenThread on a single firmware base, simplifying inventory for OEMs that ship both protocols. The integrated crypto element accelerates Thread commissioning with secure join keys, while 256KB Flash accommodates the larger OpenThread stack. Use the module's antenna-diversity support to avoid dropouts in metal-rich enclosures.
推荐
推荐产品汇总
工程参考数据： ATSAMR21G18-MR210UA ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAMR21G18A-MF | ATSAMB11-MR210CA | ATSAMR21-XPRO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package / Form Factor | 20mm × 19mm SMT module | 20mm × 19mm SMT module (MR210 family) | 20mm × 19mm SMT module (MR210 family) | Xplained Pro eval board |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0 | ARM Cortex-M0+ |
| Wireless Protocol | IEEE 802.15.4 / Zigbee / Thread | IEEE 802.15.4 / Zigbee / Thread | Bluetooth Low Energy | IEEE 802.15.4 (development board) |
| Regulatory Certifications (FCC / RED) | Yes (modular approval) | Depends on variant | Yes (modular approval) | No (evaluation only) |
| Typical Unit Price (qty 1, USD) | 17.80 | Lower (silicon only) | Similar tier | Higher (eval kit) |
关键差异点
- Integrated hardware crypto-authentication device on-module （对比 ATSAMR21G18A-MF)
- Zigbee/802.15.4/Thread vs Bluetooth LE （对比 ATSAMB11-MR210CA)
- Modular regulatory approval reduces time to market （对比 ATSAMR21-XPRO development board)
设计说明
Place the ATSAMR21G18-MR210UA module with the datasheet-recommended PCB keep-out region around the antenna; violating this keep-out will void the modular FCC/RED approvals even though the board still operates. Use the manufacturer footprint file (not a generic 20×19 package) and provide a solid ground plane beneath the module. If you need a different antenna than the approved list, you must re-certify the radio in your end product.
Decouple VBAT with at least 10µF ceramic + 100nF X7R placed within 5mm of the module supply pins, plus a ferrite bead if the host board has noisy digital loads sharing the same rail. The integrated DC-DC and LDO paths inside the MR210UA module already provide cleaned rails to the silicon, but upstream supply noise couples into TX power amplifier ripple. For battery applications, place a 100kΩ resistor on RESET to avoid leakage through floating reset pins in deep sleep.
Estimated: at maximum TX output power (~+4 dBm) and continuous duty, the module may dissipate roughly 100-200 mW; ensure the host PCB has at least 100 mm² of copper thermal relief around the GND pins, though typical ambient-room designs run cool and do not require a heatsink. If your application forces continuous TX (e.g., wave-metering), derate output power or schedule TX-on times to keep the junction temperature below 70°C.
Do not assume the I2C pins of the integrated crypto-authentication device are free general-purpose I/Os - bus arbitration is needed if you add a second I2C master on the same bus. Do not share the external serial flash SPI bus with high-speed peripherals without careful timing analysis, because the radio interrupt latency is critical for Zigbee/Thread stack timing. Always program the encrypted boot image using Microchip's TrustZone-aware flow; storing keys in main Flash defeats the crypto element.
Route SWD/SWCLK as a short 50Ω-ish pair with ground on adjacent layers; the Cortex-M0+ debug interface is robust but loses connection if host board noise couples onto SWDIO. Keep the antenna trace from the module to its u.FL (or PCB antenna) free of vias and within the RF keep-out. If you reuse the same PCB for the ATSAMB11-MR210CA variant, route antennas generously because Bluetooth LE needs different matching than 802.15.4 at the same 2.4GHz band.
合规信息
FCC and CE (RED) modular approvals apply to the MR210UA variant when paired with antennas from the datasheet approved list. AEC-Q100 is not applicable - the part is not automotive-qualified. RoHS compliance confirmed per Microchip product page.
