ATSAMD20J15B-MU - ARM Cortex-M0+ 32KB Flash MCU | Microchip
MPN: ATSAMD20J15B-MU ✓ פעילATSAMD20J15B-MU סקירה
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.
חלופות תחליף ישיר עבור ATSAMD20J15B-MU — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ATSAMD20J15B-MU (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Package, RoHS Status, DAC, SERCOM Modules.
ATSAMD20J15B-MUT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20J14B-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20G18A-MU
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20G16B-MU
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20E16B-MU
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20J15B-MU דירוגים מרביים ומאפיינים חשמליים
| Core | ARM Cortex-M0+ |
| Architecture | 32-bit RISC |
| תדר שעון מקסימלי | 48 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| טווח טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| מארז | 64-pin VQFN (9x9 mm) with exposed pad |
| סוג הרכבה | 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) |
| סטטוס RoHS | Compliant (Pb-free / Green) |
תצורת פינים של ATSAMD20J15B-MU
| פין 1 | PA00 — GPIO / XIN / ADC0 |
| פין 2 | PA01 — GPIO / XOUT / ADC1 |
| פין 3 | PA02 — GPIO / AIN0 / PTC_Y0 |
| פין 4 | PA03 — GPIO / AIN1 / PTC_Y1 |
| פין 5 | PA04 — GPIO / AIN2 / PTC_Y2 |
| פין 6 | PA05 — GPIO / AIN3 / PTC_Y3 |
| פין 7 | PA06 — GPIO / AIN4 / PTC_Y4 |
| פין 8 | PA07 — GPIO / AIN5 / PTC_Y5 |
| פין 9 | VDDIO — I/O supply |
| פין 10 | GND — Ground |
| פין 11 | PA08 — GPIO / SERCOM0 PAD0 |
| פין 12 | PA09 — GPIO / SERCOM0 PAD1 |
| פין 13 | PA10 — GPIO / SERCOM0 PAD2 |
| פין 14 | PA11 — GPIO / SERCOM0 PAD3 |
| פין 15 | PA12 — GPIO / SERCOM2 PAD0 |
| פין 16 | PA13 — GPIO / SERCOM2 PAD1 |
| פין 17 | PA14 — GPIO / SERCOM2 PAD2 |
| פין 18 | PA15 — GPIO / SERCOM2 PAD3 |
| פין 19 | PA16 — GPIO / SERCOM1 PAD0 |
| פין 20 | PA17 — GPIO / SERCOM1 PAD1 |
| פין 21 | PA18 — GPIO / SERCOM1 PAD2 |
| פין 22 | PA19 — GPIO / SERCOM1 PAD3 |
| פין 23 | PA20 — GPIO / SERCOM3 PAD0 |
| פין 24 | PA21 — GPIO / SERCOM3 PAD1 |
| פין 25 | PA22 — GPIO / SERCOM3 PAD2 |
| פין 26 | PA23 — GPIO / SERCOM3 PAD3 |
| פין 27 | PA24 — GPIO / USB_DM |
| פין 28 | PA25 — GPIO / USB_DP |
| פין 29 | PA26 — GPIO / TCC0_WO0 |
| פין 30 | PA27 — GPIO / TCC0_WO1 |
| פין 31 | PA28 — GPIO / TCC1_WO0 |
| פין 32 | GND — Ground (package EP) |
| פין 33 | PB00 — GPIO / TCC1_WO1 |
| פין 34 | PB01 — GPIO / TCC1_WO2 |
| פין 35 | PB02 — GPIO / SERCOM5 PAD0 |
| פין 36 | PB03 — GPIO / SERCOM5 PAD1 |
| פין 37 | PB04 — GPIO / SERCOM5 PAD2 |
| פין 38 | PB05 — GPIO / SERCOM5 PAD3 |
| פין 39 | PB06 — GPIO / SERCOM4 PAD0 |
| פין 40 | PB07 — GPIO / SERCOM4 PAD1 |
| פין 41 | PB08 — GPIO / SERCOM4 PAD2 |
| פין 42 | PB09 — GPIO / SERCOM4 PAD3 |
| פין 43 | PB10 — GPIO / SERCOM4 PAD2 alt |
| פין 44 | PB11 — GPIO / SERCOM4 PAD3 alt |
| פין 45 | VDDIO — I/O supply |
| פין 46 | VDDANA — Analog supply |
| פין 47 | GND — Ground |
| פין 48 | PB12 — GPIO / TCC0_WO6 / PTC_X0 |
| פין 49 | PB13 — GPIO / TCC0_WO7 / PTC_X1 |
| פין 50 | PB14 — GPIO / PTC_X2 / SERCOM |
| פין 51 | PB15 — GPIO / PTC_X3 / SERCOM |
| פין 52 | PB16 — GPIO / PTC_X4 / TCC0_WO4 |
| פין 53 | PB17 — GPIO / PTC_X5 / TCC0_WO5 |
| פין 54 | PB18 — GPIO / PTC_X6 |
| פין 55 | PB19 — GPIO / PTC_X7 |
| פין 56 | PB20 — GPIO / PTC_X8 |
| פין 57 | PB21 — GPIO / PTC_X9 |
| פין 58 | PB22 — GPIO / TCC0_WO2 |
| פין 59 | PB23 — GPIO / TCC0_WO3 |
| פין 60 | PB24 — GPIO / TCC1_WO2 |
| פין 61 | PB25 — GPIO / TCC1_WO3 |
| פין 62 | PB26 — GPIO / TC4_WO0 |
| פין 63 | PB27 — GPIO / TC4_WO1 |
| פין 64 | PB28 — GPIO / TC5_WO0 / DAC0_OUT |
יישומים טיפוסיים
ATSAMD20J15B-MU מתאים עבור 7 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATSAMD20J15B-MU — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Integrated Full-Speed USB 2.0 with on-chip transceiver (לעומתATSAMD20G18A-MU)
- Best price-performance for mid-complexity IoT firmware (לעומתATSAMD20G18A-MU)
- Industrial temperature range with Pb-free compliance (לעומתATSAMD20E16B-MU)
הערות תכנון
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.
מידע על תאימות
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.
