ATSAMD20J14A-MUT - 48MHz Cortex-M0+ MCU 16KB Flash | Microchip
部品番号: ATSAMD20J14A-MUT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.62 | $2.62 |
| 10 | $2.38 | $23.80 |
| 100 | $2.15 | $215.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.74 | $1,740.00 |
ATSAMD20J14A-MUT 概要
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and programmable peripherals into one device. ARM Cortex-M0+ cores are the smallest and most energy-efficient members of the ARM Cortex-M family, optimized for deterministic embedded control in cost-sensitive applications. The SAM D20J sits within Microchip's broader portfolio: ARM Cortex-M0+ MCU -> SAM D family -> SAM D20J series -> low-power 32-bit microcontroller -> embedded processor -> semiconductor.
Key features of the ATSAMD20J14A-MUT include the Cortex-M0+ core achieving 2.14 CoreMark/MHz, an integrated Serial Communication Interface (SERCOM) block providing flexible UART/SPI/I2C configuration, a 12-bit ADC up to 350ksps, and multiple sleep modes with sub-microamp standby current. The 64-QFN package includes an exposed pad that must be soldered to the PCB ground plane for proper thermal and electrical performance.
The ATSAMD20J14A-MUT is typically used as the main controller in IoT sensor nodes, low-power wireless gateways, industrial sensor interfaces, USB human-interface devices, and consumer electronics where a balance of processing performance, low power consumption, and small footprint is required. The device is supported by Microchip's MPLAB X IDE, Atmel Studio 7, and the ASF (Atmel Software Framework) library for rapid development.
When designing with this MCU, ensure the exposed pad is soldered to a continuous ground plane to achieve the rated 64-QFN thermal resistance. Decoupling capacitors must be placed within 2mm of each VDD pin pair to maintain ADC accuracy at high sampling rates, and unused I/O pins should be configured as outputs or inputs with internal pull-up to minimize leakage current in sleep modes.
This page synthesizes distributor pricing, drop-in alternatives within the SAM D20 family, and practical design notes not consolidated on the manufacturer datasheet alone, helping engineers select and source the ATSAMD20J14A-MUT with confidence.
ドロップイン代替品: ATSAMD20J14A-MUT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATSAMD20J14A-MUT （同一形状・フットプリント） — 相違点: ADC, Package, Operating Temperature, Communication Interfaces, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
ATSAMD20J14A-CNT
✅ ドロップイン✓ 在庫あり
$1.95 / 個
データシートを見る →ATSAMD20J14A-AUT
✅ ドロップイン✓ 在庫あり
$1.85 / 個
データシートを見る →ATSAMD20J14A-MU
✅ ドロップイン✓ 在庫あり
$2.12 / 個
データシートを見る →ATSAMD20J15A-MU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATSAMD20J16A-MU
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.45 / 個
データシートを見る →ATSAMD20J14A-MUT 最大定格＆電気的特性
| Core Architecture | ARM Cortex-M0+ |
| Core Bit Width | 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Performance | 2.14 CoreMark/MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data Memory (SRAM) | 2 KB |
| パッケージ | 64-QFN (9x9 mm) with exposed pad |
| ピン数 | 64 |
| Operating Voltage Range | 1.62 V to 3.63 V |
| ADC | 12-bit, up to 350 ksps |
| Communication Interfaces | SERCOM (configurable UART/SPI/I2C) |
| 動作温度範囲 | -40 C to +85 C (Industrial) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
ATSAMD20J14A-MUT 64-qfn (9x9 mm) with exposed pad ピン配置ガイド
ATSAMD20J14A-MUT (64-qfn (9x9 mm) with exposed pad パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATSAMD20J14A-MUT.
詳細は データシート をご参照ください。
主な用途
ATSAMD20J14A-MUT の用途: 6 件s: IoT Sensor Node Controller, USB Human Interface Device (HID), Industrial Sensor Interface Module, Low-Power Wireless Gateway, Consumer Electronics Main Controller, Battery-Powered Wearable Device.
IoT Sensor Node Controller
The ATSAMD20J14A-MUT is well-suited as the main controller in battery-powered IoT sensor nodes. Its 48MHz Cortex-M0+ core delivers 2.14 CoreMark/MHz performance for sensor data acquisition, while multiple low-power sleep modes draw sub-microamp standby current, extending battery life to months or years. The 16KB Flash comfortably holds application firmware plus a wireless protocol stack like LoRaWAN or Zigbee. The 12-bit ADC at 350 ksps captures analog sensor readings, and SERCOM peripherals interface with digital sensors over I2C/SPI. At 1.62V minimum supply, the device operates directly from single-cell Li-ion or 2xAA batteries without boost conversion. Place the MCU adjacent to the sensor array and route ADC traces away from switching nodes for best noise performance.
おすすめ
USB Human Interface Device (HID)
The ATSAMD20J14A-MUT can serve as the controller in USB HID peripherals such as keyboards, mice, and custom input devices. While it does not include native USB hardware, its 48MHz Cortex-M0+ core can bit-bang USB Low-Speed with appropriate firmware, or it can interface with an external USB transceiver via SERCOM. The 16KB Flash holds HID descriptor tables and key-press handling logic, while 2KB SRAM supports USB packet buffering. The 64-QFN package provides sufficient GPIO for matrix scanning of mechanical key switches or capacitive touch buttons. Engineers typically use the LUFA or TinyUSB library for firmware support. Include a 1.5kohm pull-up on the D+ line and ESD protection diodes for production-grade USB compliance.
おすすめ
Industrial Sensor Interface Module
The ATSAMD20J14A-MUT is ideal for industrial sensor interface modules that aggregate analog and digital signals from factory floor sensors. Its 1.62V to 3.63V supply range accommodates 24V industrial bus systems through external regulation. The 12-bit ADC at 350 ksps simultaneously samples multiple analog sensors (temperature, pressure, flow), while SERCOM peripherals communicate with digital sensors and fieldbus interfaces like RS-485. The industrial temperature grade of -40C to +85C supports factory and outdoor installations. Place the MCU on a 4-layer PCB with continuous ground plane, isolate analog and digital grounds at a single point, and add TVS diodes on exposed I/O lines for surge protection in compliance with IEC 61000-4-2/4/5.
おすすめ
Low-Power Wireless Gateway
The ATSAMD20J14A-MUT functions as the host MCU in low-power wireless gateways that bridge sub-GHz or 2.4GHz radio modules to Wi-Fi/Ethernet uplinks. Its Cortex-M0+ core runs the gateway protocol stack, parses incoming radio packets, and forwards data to the cloud. Multiple SERCOM interfaces handle SPI to the radio module and UART to the Wi-Fi/Ethernet co-processor. The device's low-power modes allow duty-cycled operation when traffic is light, reducing total system power. The 64-QFN package is footprint-compatible with the larger SAM D21 series, providing an upgrade path when more Flash or RAM is required. Add ferrite beads on supply lines and 100nF decoupling within 5mm of each VDD pin.
おすすめ
Consumer Electronics Main Controller
The ATSAMD20J14A-MUT is used as the main controller in consumer electronics like smart home devices, toys, and small appliances. The 48MHz performance handles user interface logic, motor control via PWM, and communication with mobile apps over BLE. The 16KB Flash is sufficient for typical consumer firmware, while the 2KB SRAM supports GUI buffer and protocol stacks. The industrial temperature grade allows operation in a variety of household environments. The 64-QFN package's 9x9 mm footprint integrates easily into compact consumer product enclosures. Use software debouncing on mechanical buttons and configure watchdog timer to recover from firmware lockups in deployed consumer units.
おすすめ
Battery-Powered Wearable Device
The ATSAMD20J14A-MUT serves as the core controller in battery-powered wearables such as fitness trackers, smart watches, and medical monitoring patches. The Cortex-M0+ core's energy efficiency delivers days to weeks of battery life on a small Li-ion cell. Sleep mode current under 1 microamp allows near-permanent standby while waiting for sensor interrupts or button presses. The 12-bit ADC samples heart rate or SpO2 sensors, while SERCOM peripherals drive small OLED displays and communicate with companion BLE SoCs. The 64-QFN package's compact 9x9 mm footprint fits within the tight mechanical constraints of wearable enclosures. Use a coin-cell or Li-Po battery and include a fuel gauge IC for accurate state-of-charge reporting.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATSAMD20J14A-MUT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATSAMD20J14A-CNT | ATSAMD20J14A-AUT | ATSAMD20J14A-MU | ATSAMD20J15A-MU | ATSAMD20J16A-MU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 64 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB | 8 KB |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature Range | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tray | Tray | Tray |
主な差別化要因
- Tape-and-reel packaging optimized for SMT assembly （vs ATSAMD20J14A-MU)
- Industrial temperature grade for harsh environments （vs ATSAMD20J14A-CNT)
- Scalable Flash within the same 64-QFN footprint （vs ATSAMD20J15A-MU)
設計ノート
Estimated: The 64-QFN package with exposed pad achieves rated thermal performance only when the exposed pad is soldered to a continuous PCB ground plane. Recommended: at least 4 thermal vias (0.3mm drill, 1mm pitch) under the exposed pad, connecting to an inner ground plane. Without proper thermal connection, junction temperature can rise 20-30C above datasheet ratings at moderate load, affecting reliability. The SAM D20 datasheet specifies the theta_JA values based on a JEDEC EIA/JESD51 test board with proper thermal vias - field conditions may differ.
Decoupling capacitors must be placed within 2mm of each VDD pin pair (VDD/VDDIO and VDDANA/VDDANA). Use 100nF X7R ceramic capacitors for each digital VDD pin pair and a separate 100nF for the analog VDDANA supply. Add a bulk 4.7uF ceramic capacitor near the MCU for transient load support. Route analog traces (ADC inputs, reference voltages) away from switching traces (SERCOM, PWM outputs) by at least 3mm to minimize crosstalk into ADC readings.
Three common pitfalls when designing with the ATSAMD20J14A-MUT: (1) Forgetting to solder the exposed thermal pad causes severe overheating and unreliable operation; (2) Configuring unused GPIO as analog inputs instead of outputs with internal pull-up wastes current and can introduce ADC channel cross-talk; (3) Enabling the WDT (watchdog timer) without proper firmware handling can lock up the device in production. Always enable the brown-out detector (BOD) at 2.7V threshold for 3.3V systems to prevent flash corruption during supply brownout events.
コンプライアンス情報
RoHS compliant per DigiKey product listing. Industrial temperature grade (-40C to +85C). AEC-Q100 not applicable for this non-automotive variant - choose ATSAMD20J14A-AUT for automotive-grade documentation.
