ATSAMR21G18-MR210UAT - 2.4GHz Zigbee Module, 256KB Flash | Microchip
MPN： ATSAMR21G18-MR210UAT ✓ 啟用中ATSAMR21G18-MR210UAT 概覽
An IEEE 802.15.4 / Zigbee module is a pre-certified RF sub-system that combines a microcontroller core, a 2.4 GHz radio transceiver, and the necessary impedance-matched RF front end into a single solder-mountable package. By integrating the radio and MCU in one SiP, the module category sits within the wireless-modules hierarchy: wireless module → RF module → 802.15.4 module → Zigbee module → wireless connectivity IC. This integration offloads the costly FCC/ETSI RF certification burden from the end product.
The ATSAMR21G18-MR210UAT features 256 KB of in-application programmable flash, 32 KB SRAM, an ARM Cortex-M0+ core running up to 48 MHz, and a built-in ATECC608A-class crypto-authentication device for secure key storage. Its integrated 2.4 GHz transceiver achieves a link budget suitable for indoor mesh deployments up to 50–100 m line-of-sight, while the module supports external power amplifier output and antenna diversity through the host PCB.
Typical applications include Zigbee and Thread mesh networks, smart-home lighting and sensor nodes, industrial wireless sensor networks (WSN), home automation gateways, and connected-health wearables. The pre-certified footprint reduces time-to-market for OEMs targeting Matter, Zigbee 3.0, or proprietary 802.15.4 stacks using the Atmel/Microchip ASF or Harmony 3 framework.
The U.FL external antenna interface allows the integrator to select an antenna tuned to the enclosure, and the surface-mount footprint supports standard reflow soldering at 245 °C peak per JEDEC J-STD-020. Antenna is not included with the part, simplifying import logistics and letting buyers choose a vendor-matched antenna.
This page synthesizes distributor pricing, datasheet document references, and drop-in alternative notes that are not aggregated on a single manufacturer page, complementing the official Microchip datasheet Atmel-42475.
直接替換替代品，適用於 ATSAMR21G18-MR210UAT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMR21G18-MR210UAT （相同外形與佔位） — 差異在於 Antenna Interface, Core, Core Clock Speed, Module Type, Mounting Type.
ATSAMR21G18A-MR210UA
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMR21E18A-MR210UA
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMR21G18-MR210UA
✅ 直接替換聯絡詢價
查看資料表 →ATSAMR21G18-MR210UAT 規格（製造商公布）
| Module Type | IEEE 802.15.4 / Zigbee Wireless Module |
| Frequency Band | 2.4 GHz (2400-2483.5 MHz) |
| RF Data Rate | 250 kbps (802.15.4); up to 2000 kbps |
| TX Power (typical) | +4 dBm |
| On-board SiP | ATSAMR21G18A (ARM Cortex-M0+ + 2.4 GHz radio) |
| Core | ARM Cortex-M0+ 32-bit |
| Core Clock Speed | 48 MHz max |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Serial Flash | Integrated on module |
| Crypto Authentication | Integrated on module |
| Antenna Interface | U.FL connector (antenna not included) |
| Module Footprint | 42-pin SMD module, 19 mm x 20 mm |
| 安裝類型 | Surface Mount (reflow) |
| RoHS 狀態 | Compliant |
| Protocol Support | Zigbee, Thread, IEEE 802.15.4 |
ATSAMR21G18-MR210UAT 介面與連接器
目前沒有 ATSAMR21G18-MR210UAT 的製造商公開介面清單。連接器與排針詳細資訊請參閱製造商文件。
請參閱 製造商文件 以取得完整的擴充排針腳位定義與連接器腳位編號。
典型應用
ATSAMR21G18-MR210UAT 適用於 7 應用s: Zigbee Mesh Lighting Networks, Smart Home Sensor Nodes, Industrial Wireless Sensor Networks (WSN), Connected Health Wearables, Smart Energy / AMI Metering, Building Automation HVAC and Access Control, Thread Mesh Border Routers and IoT Hubs.
Zigbee Mesh Lighting Networks
The ATSAMR21G18-MR210UAT's 256 KB flash supports full Zigbee 3.0 or Zigbee PRO stack implementations including Green Power proxy and touchlink commissioning. Its +4 dBm TX power and 250 kbps O-QPSK modulation deliver the 50–100 m indoor range required for residential and commercial lighting networks. The integrated crypto-authentication device enables secure key exchange for commissioning devices onto a Zigbee 3.0 network, while the 32 KB SRAM accommodates the network table and APS-layer encryption buffers. Paired with an AC-side wireless module and a lighting MCU, the ATSAMR21G18-MR210UAT can replace legacy wired DALI control with a wireless mesh.
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Smart Home Sensor Nodes
For battery-powered Zigbee sensors (temperature, door/window, occupancy), the ATSAMR21G18-MR210UAT integrates an ARM Cortex-M0+ core and 2.4 GHz radio in a single solderable module, eliminating the need for a separate MCU. The Cortex-M0+'s SleepWalking peripheral event system and the SAM R21's RTC domain allow deep-sleep currents below 1 µA, critical for coin-cell or 2×AAA battery nodes with 5–10 year life targets. U.FL connector lets designers select a chip or trace antenna matched to the enclosure geometry, and the module's pre-certified RF section removes the FCC Part 15.247 burden for ISM-band transmitters.
推薦
Industrial Wireless Sensor Networks (WSN)
Industrial WSN deployments benefit from the ATSAMR21G18-MR210UAT's pre-certified 2.4 GHz radio, robust mesh routing, and 256 KB flash for storing sensor calibration data and routing tables. The integrated crypto-authentication device supports secure OTA firmware updates, required for IIoT deployments where physical access is difficult. Industrial temperature ranges and the U.FL connector for an external high-gain antenna enable factory-floor coverage across steel-reinforced buildings where 2.4 GHz propagation is challenging. The module's reflow-compatible 42-pin SMD footprint simplifies PCBA integration.
推薦
Connected Health Wearables
In connected-health wearables (pulse oximeters, continuous glucose monitors, ECG patches), the ATSAMR21G18-MR210UAT's small 19×20 mm footprint and low-power SAM R21 core enable 5–7 day battery life targets. The integrated crypto-authentication device is a strong fit for HIPAA/GDPR-compliant data-at-rest requirements, providing hardware root-of-trust for patient telemetry. With 256 KB flash, the module can run Zigbee or Thread stacks plus a custom BLE coexistence handler for hybrid smartphones/medical-hub connectivity. U.FL allows a flexible printed antenna mounted on a curved housing.
推薦
Smart Energy / AMI Metering
Advanced Metering Infrastructure (AMI) endpoints benefit from the ATSAMR21G18-MR210UAT's regulatory-certified 2.4 GHz radio and Zigbee/Thread mesh capability for multi-hop HAN (Home Area Network) deployments. The on-module serial flash allows over-the-air firmware storage for HAN gateway code, while the crypto-authentication device supports DLMS/COSEM or proprietary security handshakes required by utilities. The +4 dBm TX power plus external PA option (via SAM R21's I/O) supports the 100+ meter outdoor ranges needed for AMI backhaul to neighborhood concentrators.
推薦
Building Automation HVAC and Access Control
The ATSAMR21G18-MR210UAT enables wireless retrofit of legacy HVAC and access-control systems without running new cable. Its Cortex-M0+ core handles local control loops (thermostat PID, door lock actuation) while the Zigbee/Thread radio reports to a central building automation controller. The 42-pin SMD module footprint and 19×20 mm mechanical envelope fit behind standard wall plates and above-ceiling sensor mounts. Hardware crypto-authentication prevents unauthorized access to door controllers, meeting commercial security standards. Low SleepWalking power extends battery life for wireless door/window sensors to 5+ years.
推薦
Thread Mesh Border Routers and IoT Hubs
Thread border routers aggregate low-power Thread mesh nodes onto Wi-Fi/Ethernet backbones for the Matter smart-home ecosystem. The ATSAMR21G18-MR210UAT provides the certified Thread radio with the SAM R21's 48 MHz Cortex-M0+ capable of running the OpenThread stack with CoAP/UDP forwarding. With 256 KB flash, it can host a Thread Border Router agent in addition to mesh routing tables for hundreds of nodes. U.FL allows integration of an external high-gain antenna to maximize coverage area in multi-story homes or commercial spaces.
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推薦產品摘要
工程參考資料，適用於 ATSAMR21G18-MR210UAT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMR21G18A-MR210UA | ATSAMR21E18A-MR210UA | ATSAMR21G18-MR210UA |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 42-pin SMD module, 19x20 mm | 42-pin SMD module, 19x20 mm - same | 42-pin SMD module, 19x20 mm - same | 42-pin SMD module, 19x20 mm - same |
| Packaging | Tape & Reel | Tray | Tray | Tray |
| On-board SiP | ATSAMR21G18A | ATSAMR21G18A | ATSAMR21E18A | ATSAMR21G18A |
| Flash / SRAM | 256 KB / 32 KB | 256 KB / 32 KB | 256 KB / 32 KB | 256 KB / 32 KB |
| Crypto Authentication | Yes (on-module) | Yes | No | Yes |
| Antenna Connector | U.FL | U.FL | U.FL | U.FL |
| Frequency / Protocol | 2.4 GHz / 802.15.4 / Zigbee / Thread | 2.4 GHz / 802.15.4 / Zigbee / Thread | 2.4 GHz / 802.15.4 / Zigbee / Thread | 2.4 GHz / 802.15.4 / Zigbee / Thread |
主要差異化特點
- Pre-certified 2.4 GHz module eliminates RF regulatory burden (對比Bare ATSAMR21G18A-MF IC)
- Includes on-module crypto-authentication device (對比ATSAMR21E18A-MR210UA (lower-cost sibling))
- Cortex-M0+ at 48 MHz with 256 KB flash supports full Zigbee 3.0 / Thread stack (對比ATSAMR21G18A-MR210UA (tray variant))
設計說明
The ATSAMR21G18-MR210UAT uses castellated edge pads for reflow soldering. Follow Microchip's recommended land pattern exactly - deviation of more than 0.1 mm in pad pitch can cause solder bridging or open joints. The module's central thermal pad (if present) must be soldered to a copper pour of at least 25 mm² for proper heat dissipation. JEDEC J-STD-020 reflow profile with 245 °C peak temperature and 60 s time-above-liquidus is recommended. Place a 4.7 µF + 0.1 µF decoupling capacitor pair within 3 mm of the module's VDD pin to suppress 2.4 GHz harmonic noise.
Antenna is not included with the ATSAMR21G18-MR210UAT. Designers must select a U.FL-terminated 2.4 GHz antenna whose VSWR is below 2:1 across the 2400–2483.5 MHz band to maintain regulatory compliance. A mismatched antenna can shift the radiated harmonics out of the FCC/ETSI mask even though the module itself is certified. Also note: the module ships in tape-and-reel (suffix 'T'); tray-packaged samples (suffix 'A') are available but production should specify 'T' for SMT lines.
Place the U.FL connector and antenna trace on the same side of the PCB as the module, with a continuous ground plane underneath the module footprint to control impedance. Keep the U.FL pigtail length below 25 mm to minimize insertion loss. For enclosures with plastic walls, mount the antenna near the edge of the board pointing outward; metal-shielded enclosures attenuate the 2.4 GHz signal by 15–25 dB and require an external antenna cable. If the design uses both the SAM R21 MCU peripherals and the 2.4 GHz radio simultaneously, route GPIO traces away from the antenna area to avoid coupling.
The ATSAMR21G18-MR210UAT draws approximately 13 mA in continuous RX mode and 17 mA at +4 dBm TX. For battery-powered designs, use SleepWalking and the SAM R21's RTC domain to enter deep-sleep below 1 µA. Estimated: at 1 transmission per minute and 0.5% duty cycle, a 2×AAA battery pack (2500 mAh) supports 3–5 years of operation. Decoupling must include a 10 µF bulk capacitor in parallel with the 0.1 µF high-frequency bypass to handle the TX burst current without rail droop.
合規資訊
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is a commercial/industrial grade module. For automotive Zigbee deployments, evaluate AEC-Q100 qualified alternatives. EU/ETSI compliance for the module is documented in the user manual; final product compliance is the integrator's responsibility.
