ATSAMD20J15B-MU - ARM Cortex-M0+ 32KB Flash MCU | Microchip
MPN: ATSAMD20J15B-MU ✓ Hoạt độngATSAMD20J15B-MU Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals into one package. The ARM Cortex-M0+ is the smallest and most energy-efficient ARM core, optimized for embedded deterministic control in IoT, sensor nodes, and battery-powered devices. The SAMD20 family from Microchip combines this ARM core with Microchip's SAM peripherals (SERCOM, TCC, ADC, DAC) to deliver an MCU hierarchy of Cortex-M0+ MCU -> microcontroller -> embedded processor -> semiconductor, suited to general-purpose mixed-signal applications.
Key features of the ATSAMD20J15B-MU include six SERCOM serial communication interfaces (configurable as UART/SPI/I2C), a 12-bit ADC with up to 12 channels, a 10-bit DAC, two 16-bit timers, a 24-bit timer, and a full-speed USB 2.0 device interface. It supports up to 52 GPIO, has an Event System for inter-peripheral signaling without CPU overhead, and offers low-power Sleep, Standby, and Backup modes with sub-microamp standby current. The integrated Peripheral Touch Controller (PTC) supports capacitive touch hardware-accelerated scanning.
The device is built on an advanced low-power CMOS process with a 2.4 mA/MHz active current at full 48 MHz operation. The SERCOM modules can each be reconfigured independently, dramatically reducing BOM cost by letting one physical interface serve as UART, SPI, or I2C as design needs evolve. The integrated SleepWalking peripheral-event wake system lets peripherals wake the CPU only when meaningful data arrives, ideal for battery-powered IoT endpoints.
Typical applications include home automation controllers, smart thermostats, sensor hubs, industrial sensor nodes, low-power wireless IoT gateways, wearable fitness bands, capacitive touch user interfaces, USB-CDC bridge dongles, and consumer appliance control boards. The 32 KB Flash and 4 KB SRAM are well-matched to medium-complexity IoT edge stacks running FreeRTOS or ASF firmware.
When designing with this MCU, decouple VDDIN/VDDIO with 100 nF X7R ceramics placed within 2 mm of each power pin, and connect the exposed thermal pad to a continuous ground plane for thermal and electrical performance. Use the SERCOM peripheral-mux feature to remap I/O as your pinout evolves, and consider ATSAMD20J14B-MU (16 KB Flash) as a cost-down option if you do not need 32 KB.
This page synthesizes distributor pricing, drop-in SAMD20 alternatives, and practical hardware design notes not found in the standalone Microchip datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20J15B-MU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMD20J15B-MU (cùng hình factor và footprint) — khác nhau ở ADC, Package, RoHS Status, DAC, SERCOM Modules.
ATSAMD20J15B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20J14B-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20G18A-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20G16B-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20E16B-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J15B-MU Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ |
| Architecture | 32-bit RISC |
| Tần số xung maksimum | 48 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 64-pin VQFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| GPIO Count | Up to 52 |
| SERCOM Modules | 6 (UART/SPI/I2C configurable) |
| ADC | 12-bit, up to 12 channels |
| DAC | 10-bit, 1 channel |
| USB | Full-Speed USB 2.0 Device |
| Timers | Two 16-bit, one 24-bit |
| Peripheral Touch Controller | Yes (PTC hardware) |
| Trạng thái RoHS | Compliant (Pb-free / Green) |
Cấu hình chân ATSAMD20J15B-MU
| Chân 1 | PA00 — GPIO / XIN / ADC0 |
| Chân 2 | PA01 — GPIO / XOUT / ADC1 |
| Chân 3 | PA02 — GPIO / AIN0 / PTC_Y0 |
| Chân 4 | PA03 — GPIO / AIN1 / PTC_Y1 |
| Chân 5 | PA04 — GPIO / AIN2 / PTC_Y2 |
| Chân 6 | PA05 — GPIO / AIN3 / PTC_Y3 |
| Chân 7 | PA06 — GPIO / AIN4 / PTC_Y4 |
| Chân 8 | PA07 — GPIO / AIN5 / PTC_Y5 |
| Chân 9 | VDDIO — I/O supply |
| Chân 10 | GND — Ground |
| Chân 11 | PA08 — GPIO / SERCOM0 PAD0 |
| Chân 12 | PA09 — GPIO / SERCOM0 PAD1 |
| Chân 13 | PA10 — GPIO / SERCOM0 PAD2 |
| Chân 14 | PA11 — GPIO / SERCOM0 PAD3 |
| Chân 15 | PA12 — GPIO / SERCOM2 PAD0 |
| Chân 16 | PA13 — GPIO / SERCOM2 PAD1 |
| Chân 17 | PA14 — GPIO / SERCOM2 PAD2 |
| Chân 18 | PA15 — GPIO / SERCOM2 PAD3 |
| Chân 19 | PA16 — GPIO / SERCOM1 PAD0 |
| Chân 20 | PA17 — GPIO / SERCOM1 PAD1 |
| Chân 21 | PA18 — GPIO / SERCOM1 PAD2 |
| Chân 22 | PA19 — GPIO / SERCOM1 PAD3 |
| Chân 23 | PA20 — GPIO / SERCOM3 PAD0 |
| Chân 24 | PA21 — GPIO / SERCOM3 PAD1 |
| Chân 25 | PA22 — GPIO / SERCOM3 PAD2 |
| Chân 26 | PA23 — GPIO / SERCOM3 PAD3 |
| Chân 27 | PA24 — GPIO / USB_DM |
| Chân 28 | PA25 — GPIO / USB_DP |
| Chân 29 | PA26 — GPIO / TCC0_WO0 |
| Chân 30 | PA27 — GPIO / TCC0_WO1 |
| Chân 31 | PA28 — GPIO / TCC1_WO0 |
| Chân 32 | GND — Ground (package EP) |
| Chân 33 | PB00 — GPIO / TCC1_WO1 |
| Chân 34 | PB01 — GPIO / TCC1_WO2 |
| Chân 35 | PB02 — GPIO / SERCOM5 PAD0 |
| Chân 36 | PB03 — GPIO / SERCOM5 PAD1 |
| Chân 37 | PB04 — GPIO / SERCOM5 PAD2 |
| Chân 38 | PB05 — GPIO / SERCOM5 PAD3 |
| Chân 39 | PB06 — GPIO / SERCOM4 PAD0 |
| Chân 40 | PB07 — GPIO / SERCOM4 PAD1 |
| Chân 41 | PB08 — GPIO / SERCOM4 PAD2 |
| Chân 42 | PB09 — GPIO / SERCOM4 PAD3 |
| Chân 43 | PB10 — GPIO / SERCOM4 PAD2 alt |
| Chân 44 | PB11 — GPIO / SERCOM4 PAD3 alt |
| Chân 45 | VDDIO — I/O supply |
| Chân 46 | VDDANA — Analog supply |
| Chân 47 | GND — Ground |
| Chân 48 | PB12 — GPIO / TCC0_WO6 / PTC_X0 |
| Chân 49 | PB13 — GPIO / TCC0_WO7 / PTC_X1 |
| Chân 50 | PB14 — GPIO / PTC_X2 / SERCOM |
| Chân 51 | PB15 — GPIO / PTC_X3 / SERCOM |
| Chân 52 | PB16 — GPIO / PTC_X4 / TCC0_WO4 |
| Chân 53 | PB17 — GPIO / PTC_X5 / TCC0_WO5 |
| Chân 54 | PB18 — GPIO / PTC_X6 |
| Chân 55 | PB19 — GPIO / PTC_X7 |
| Chân 56 | PB20 — GPIO / PTC_X8 |
| Chân 57 | PB21 — GPIO / PTC_X9 |
| Chân 58 | PB22 — GPIO / TCC0_WO2 |
| Chân 59 | PB23 — GPIO / TCC0_WO3 |
| Chân 60 | PB24 — GPIO / TCC1_WO2 |
| Chân 61 | PB25 — GPIO / TCC1_WO3 |
| Chân 62 | PB26 — GPIO / TC4_WO0 |
| Chân 63 | PB27 — GPIO / TC4_WO1 |
| Chân 64 | PB28 — GPIO / TC5_WO0 / DAC0_OUT |
Ứng dụng tiêu biểu
ATSAMD20J15B-MU phù hợp cho 7 Áp dụngs: Home Automation Controller, Industrial Sensor Node, Capacitive Touch User Interface, USB-CDC Bridge Dongle, Wearable Fitness Band, Smart Meter / Utility Endpoint, Consumer Appliance Control Board.
Home Automation Controller
The ATSAMD20J15B-MU fits home automation hubs because of its 48 MHz Cortex-M0+ core, six SERCOM interfaces for multiple wireless modules (Wi-Fi, BLE, LoRa, Zigbee), and 32 KB Flash that comfortably runs Z-Wave/Zigbee stack libraries. The wide 1.62V-3.63V supply range simplifies direct battery or mains-rail powering, while the low-power Sleep modes cut idle consumption for always-on wall-mounted controllers. The 12-bit ADC with 12 channels can read multiple sensor inputs simultaneously for HVAC and lighting systems.
Được đề xuất
Industrial Sensor Node
The ATSAMD20J15B-MU is well-suited for industrial sensor nodes because of its industrial -40C to +85C temperature range, integrated 12-bit ADC for analog transducers, and Event System that lets peripherals wake the CPU only when meaningful data is ready. The 32 KB Flash holds Modbus RTU or IO-Link device firmware, while the SERCOM UART/SPI bridges to RS-485 transceivers or external ADCs. SleepWalking peripherals deliver years of operation from battery or energy-harvested power.
Được đề xuất
Capacitive Touch User Interface
The ATSAMD20J15B-MU supports hardware-accelerated capacitive touch via its integrated Peripheral Touch Controller (PTC), enabling up to 256 button/slider/wheel electrodes without an external touch IC. The 32 KB Flash and 4 KB SRAM hold the Atmel QTouch library, and the SERCOM peripherals can drive an I2C/SPI TFT display simultaneously. Low-power PTC scanning makes it ideal for battery-powered touch remotes and white-goods control panels.
Được đề xuất
USB-CDC Bridge Dongle
The ATSAMD20J15B-MU integrates Full-Speed USB 2.0 with an on-chip transceiver, removing the need for an external PHY and enabling compact USB-CDC bridge dongles, HID game controllers, or DFU bootloaders. The 32 KB Flash hosts the USB CDC class stack plus custom protocol firmware, while six SERCOM interfaces simultaneously connect to UART/SPI peripherals on the bridge. The 3.3V VDDIO range aligns directly with USB rail requirements.
Được đề xuất
Wearable Fitness Band
The ATSAMD20J15B-MU's low-power Sleep and Standby modes with sub-microamp standby current make it a strong fit for wearable fitness bands. The 32 KB Flash and 4 KB SRAM hold step-counter, heart-rate, and BLE-Companion code, while the integrated 12-bit ADC reads photodiode HR sensor signals. The compact 9x9 mm VQFN footprint fits inside a thin wristband, and the wide 1.62V-3.63V supply supports direct coin-cell operation without boost conversion.
Được đề xuất
Smart Meter / Utility Endpoint
The ATSAMD20J15B-MU serves smart electricity, water, or gas meter endpoints because of its 32 KB Flash for metering protocol stacks (DLMS/COSEM, Wireless M-Bus), 12-bit ADC for analog metering front-ends, and ultra-low Sleep current for 10+ year battery life. Its industrial -40C to +85C rating tolerates outdoor enclosures, while six SERCOM interfaces support optical/wired/wireless M-Bus transceivers simultaneously. The integrated RTC plus Backup mode enables accurate time-stamping with minimal power draw.
Được đề xuất
Consumer Appliance Control Board
The ATSAMD20J15B-MU fits consumer appliance control boards (washing machines, coffee makers, air purifiers) where cost-sensitive mixed-signal integration matters. The 12-bit ADC reads temperature and humidity sensors, the SERCOM peripherals drive motor-control companion chips via SPI, and the integrated PTC adds capacitive touch buttons without a separate touch IC. The wide 1.62V-3.63V supply range simplifies power designs that connect to mains-derived 5V or 3.3V rails.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD20J15B-MU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMD20J15B-MUT | ATSAMD20J14B-MU | ATSAMD20G18A-MU | ATSAMD20G16B-MU |
|---|---|---|---|---|---|
| Package | 64-pin VQFN (9x9) | 64-pin VQFN (9x9) - same | 64-pin VQFN (9x9) - same | 64-pin VQFN (9x9) - same | 64-pin VQFN (9x9) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 16 KB | 256 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 32 KB | 8 KB |
| Operating Voltage | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V |
| SERCOM Modules | 6 | 6 | 6 | 6 | 6 |
| USB | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Integrated Full-Speed USB 2.0 with on-chip transceiver (vsATSAMD20G18A-MU)
- Best price-performance for mid-complexity IoT firmware (vsATSAMD20G18A-MU)
- Industrial temperature range with Pb-free compliance (vsATSAMD20E16B-MU)
Ghi chú thiết kế
Decouple VDDIN, VDDIO, and VDDANA each with a 100 nF X7R ceramic capacitor placed within 2 mm of the respective supply pin, plus a bulk 4.7 uF to 10 uF capacitor. VDDANA can be tied to VDDIO if analog performance is not critical; otherwise, use a ferrite bead or filter to isolate. For USB applications, ensure VDDIO is at least 3.0V before enabling the USB transceiver to meet USB electrical specifications.
Solder the 64-VQFN exposed thermal pad to a continuous ground plane using at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) for proper heat dissipation and electrical performance. Keep the SERCOM and USB traces under 50 mm with 50 ohm controlled impedance for USB, and place the 32.768 kHz crystal load capacitors as close as possible to the XIN/XOUT pins to minimize stray capacitance and oscillator jitter.
Avoid leaving the SWDIO/SWDCLK pins unconnected during PCB layout - they are required for programming and debugging. If unused, route them to a 2x5 header for the Atmel-ICE or SAM-ICE probe. Do not enable the USB peripheral until VDDIO reaches 3.0V minimum, or bus errors will occur. The NVMCTRL peripheral must be unlocked (CTRLB.LOCK = 0) before Flash writes; the Atmel Start framework handles this but bare-metal code must include the unlock sequence.
Route the USB DP/DM pair as a 90 ohm differential pair with length matching to within 1 mm, and keep them isolated from high-frequency switching signals such as SERCOM SPI clocks. The 12-bit ADC input traces should be guarded by a ground polygon to reduce digital switching noise; place ADC reference capacitors as close to the VREFA pin as possible. Reserve PA24/PA25 exclusively for USB when USB is enabled, as they are not usable as general GPIO.
Thông tin tuân thủ
Pb-free / Green package per Microchip ordering code "MU". Not AEC-Q100 qualified; choose AEC-Q100 automotive MCUs (e.g., ATSAMC20) for vehicle applications. RoHS and REACH compliant per Microchip product page.
