ATSAMD20J14A-MNT - 48MHz Cortex-M0+ 16KB Flash MCU | Microchip
MPN: ATSAMD20J14A-MNT ✓ Hoạt độngATSAMD20J14A-MNT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals into one package. ARM Cortex-M0+ cores are the smallest and most energy-efficient members of the Cortex-M family, intended for deterministic real-time embedded control. The SAM D20J family lies within the broader Atmel SMART lineup of Cortex-M microcontrollers, designed for low-power IoT, consumer, and industrial applications where ARM ecosystem compatibility and ultra-low standby current matter.
Key features of the ATSAMD20J14A-MNT include its Cortex-M0+ core with single-cycle I/O access, a built-in 32 kHz internal oscillator and 8 MHz to 48 MHz DFLL for clocking flexibility, an event system for inter-peripheral signaling without CPU intervention, and the SAM D20's signature SleepWalking peripheral operation that lets ADCs and SERCOMs run while the CPU is stopped. The part offers 14 SERCOM instances in the 64-pin SAM D20J variants, six of which are bonded out on this package.
Designers benefit from Microchip's MPLAB X IDE support, the Harmony 3 framework, and the SAMD20/21 family pin compatibility, which simplifies migration within the portfolio. The QFN package's exposed thermal pad and 9x9 mm footprint enable compact layouts with good thermal dissipation for motor control, sensor hubs, and battery-powered products.
Typical applications include IoT sensor nodes, BLE/Wi-Fi co-processor hosts, USB device controllers (with on-chip USB on related parts), industrial sensor interfaces, low-power wearables, and home automation controllers. Engineers also use it as a pin-compatible scaling option when projects move between the SAM D20E (32-pin) and SAM D20G (48-pin) versions within the same family.
Design consideration: the ATSAMD20J14A-MNT has only 16KB Flash, which constrains the choice of TCP/IP stacks and Bluetooth libraries. For complex code bases consider ATSAMD20J18A-MNT (256KB) or ATSAMD20G18A-MU. Always include a 1 uF decoupling capacitor on VDD and a 10 nHF on the analog supply AVDD, and follow the reference schematic in the Atmel SMART SAM D20 datasheet to avoid POR and brownout issues.
This page synthesizes distributor pricing, drop-in pin-compatible variants, and application notes not found in the bare datasheet, providing a single-point engineering reference for the ATSAMD20J14A-MNT and its place in the Microchip SAM D20 family.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20J14A-MNT — 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 ATSAMD20J14A-MNT (cùng hình factor và footprint) — khác nhau ở Package, ADC, SRAM, Operating Temperature, MSL Level.
ATSAMD20J14A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20J14A-CNT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20J18A-MNT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J17A-MNT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J16A-MNT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21J18A-MUT64
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J14A-MNT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ |
| Family | SAM D20J |
| Bit Width | 32-bit |
| Tần số xung maksimum | 48 MHz |
| CoreMark/MHz | 2.14 |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Supply Voltage Range | 1.6 V to 3.6 V |
| Typical Supply Voltage | 3.3 V |
| Khoảng nhiệt độ hoạt động | -40 C to +105 C (industrial) |
| Hộp | 64-pin QFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape and Reel |
| Trạng thái RoHS | Compliant |
| ADC | 12-bit SAR |
| DAC | 10-bit |
Cấu hình chân ATSAMD20J14A-MNT
| Chân 1 | PA00 — GPIO, SERCOM1[0], TCC2[0] |
| Chân 2 | PA01 — GPIO, SERCOM1[1], TCC2[1] |
| Chân 3 | PA02 — GPIO, SERCOM0[0] |
| Chân 4 | PA03 — GPIO, SERCOM0[1], ADC AIN1 |
| Chân 5 | PA04 — GPIO, SERCOM0[2], ADC AIN2 |
| Chân 6 | PA05 — GPIO, SERCOM0[3], ADC AIN3 |
| Chân 7 | PA06 — GPIO, SERCOM0[4] |
| Chân 8 | PA07 — GPIO, SERCOM0[5] |
| Chân 9 | VDD — Digital supply voltage input |
| Chân 10 | GND — Ground reference |
| Chân 11 | PA08 — GPIO, SERCOM1[2], ADC AIN4 |
| Chân 12 | PA09 — GPIO, SERCOM1[3], ADC AIN5 |
| Chân 13 | PA10 — GPIO, SERCOM2[0], ADC AIN6 |
| Chân 14 | PA11 — GPIO, SERCOM2[1], ADC AIN7 |
| Chân 15 | PA12 — GPIO, SERCOM2[2] |
| Chân 16 | PA13 — GPIO, SERCOM2[3] |
| Chân 17 | PA14 — GPIO, SERCOM3[0] |
| Chân 18 | PA15 — GPIO, SERCOM3[1] |
| Chân 19 | PA16 — GPIO, SERCOM3[2] |
| Chân 20 | PA17 — GPIO, SERCOM3[3] |
| Chân 21 | PA18 — GPIO, SERCOM5[2] |
| Chân 22 | PA19 — GPIO, SERCOM5[3] |
| Chân 23 | PA20 — GPIO, SERCOM5[0] |
| Chân 24 | PA21 — GPIO, SERCOM5[1] |
| Chân 25 | PA22 — GPIO, SERCOM5[2] |
| Chân 26 | PA23 — GPIO, SERCOM5[3] |
| Chân 27 | PA24 — GPIO, SERCOM3[2] |
| Chân 28 | PA25 — GPIO, SERCOM3[3] |
| Chân 29 | PA26 — GPIO, SERCOM5[0] |
| Chân 30 | PA27 — GPIO, SERCOM5[1] |
| Chân 31 | PA28 — GPIO, SERCOM5[2] |
| Chân 32 | PA29 — GPIO, SERCOM5[3] |
| Chân 33 | PA30 — GPIO, SWDIO |
| Chân 34 | PA31 — GPIO, SWCLK |
| Chân 35 | PB00 — GPIO, SERCOM5[2] |
| Chân 36 | PB01 — GPIO, SERCOM5[3] |
| Chân 37 | PB02 — GPIO, SERCOM5[0], ADC AIN10 |
| Chân 38 | PB03 — GPIO, SERCOM5[1], ADC AIN11 |
| Chân 39 | PB04 — GPIO, SERCOM5[2] |
| Chân 40 | PB05 — GPIO, SERCOM5[3] |
| Chân 41 | PB06 — GPIO, SERCOM5[0] |
| Chân 42 | PB07 — GPIO, SERCOM5[1] |
| Chân 43 | PB08 — GPIO, SERCOM5[2], ADC AIN12 |
| Chân 44 | PB09 — GPIO, SERCOM5[3], ADC AIN13 |
| Chân 45 | PB10 — GPIO, SERCOM5[2] |
| Chân 46 | PB11 — GPIO, SERCOM5[3] |
| Chân 47 | PB12 — GPIO, SERCOM5[0] |
| Chân 48 | PB13 — GPIO, SERCOM5[1] |
| Chân 49 | PB14 — GPIO, SERCOM5[2] |
| Chân 50 | PB15 — GPIO, SERCOM5[3] |
| Chân 51 | PB16 — GPIO, SERCOM5[0] |
| Chân 52 | PB17 — GPIO, SERCOM5[1] |
| Chân 53 | PB18 — GPIO, SERCOM5[2] |
| Chân 54 | PB19 — GPIO, SERCOM5[3] |
| Chân 55 | PB20 — GPIO, SERCOM3[0] |
| Chân 56 | PB21 — GPIO, SERCOM3[1] |
| Chân 57 | PB22 — GPIO, SERCOM1[2] |
| Chân 58 | PB23 — GPIO, SERCOM1[3] |
| Chân 59 | PB24 — GPIO, SERCOM0[0] |
| Chân 60 | PB25 — GPIO, SERCOM0[1] |
| Chân 61 | PB26 — GPIO, SERCOM0[2] |
| Chân 62 | PB27 — GPIO, SERCOM0[3] |
| Chân 63 | VBAT — Battery / RTC supply input |
| Chân 64 | GND — Ground / thermal pad (EP) |
Ứng dụng tiêu biểu
ATSAMD20J14A-MNT phù hợp cho 6 Áp dụngs: IoT Sensor Node, Industrial Sensor Hub, Battery-Powered Wearable, Home Automation Controller, Low-Voltage Motor Control, Smart Agriculture Sensor.
IoT Sensor Node
The ATSAMD20J14A-MNT's 48 MHz Cortex-M0+ core, six SERCOM interfaces, and 12-bit ADC make it an ideal host for IoT sensor nodes acquiring temperature, humidity, or accelerometer data. Its 1.6 V to 3.6 V supply range supports coin-cell or single-cell Li-Ion battery power, and SleepWalking lets the ADC run while the CPU is stopped, reducing average current below 10 uA. Pair the MCU with a Wi-Fi or BLE module such as the ATWINC1500 or RN4871 via UART, and you have a sub-$5 connected sensor platform. Internal 2 KB SRAM limits firmware complexity, so choose ATSAMD20J18A-MNT if your edge-compute stack grows. The 64-pin QFN footprint also leaves room for additional GPIO to drive status LEDs or wake-up interrupts.
Được đề xuất
Industrial Sensor Hub
With the industrial temperature grade (-40 C to +105 C) and a 64-pin QFN package, the ATSAMD20J14A-MNT serves as a robust industrial sensor hub on factory floors. Its 12-bit SAR ADC delivers 350 ksamples/sec, sufficient for vibration monitoring and analog sensor signal conditioning. The SERCOM ports can drive RS-485 transceivers like ISL3179 via external level shifters, enabling Modbus RTU master roles. Hardware AES and CRC peripherals accelerate secure-boot loads, and the event system allows interrupts without CPU wake-up for deterministic response. Designers use Harmony 3's sensor framework to speed development, and the part's 10-year longevity commitment from Microchip qualifies it for long-lifecycle industrial installations.
Được đề xuất
Battery-Powered Wearable
Wearable devices such as fitness bands, smart watches, and BLE health patches benefit from the ATSAMD20J14A-MNT's low-power architecture and minimal 64-pin QFN footprint (9x9 mm). In SleepWalking mode the device draws as little as 1.5 uA while an ADC reading triggers a wake-up event, extending battery life from days to weeks on a small Li-Po cell. The Cortex-M0+ executes BLE stack support functions while a separate Bluetooth module handles the radio, and the 6-channel SERCOM can drive SPI displays, I2C heart-rate sensors, and UART debug channels. Engineers prefer the -MNT tape-and-reel version for high-volume SMT assembly lines and report no thermal issues at 48 MHz with 3.3 V supply during typical wear times.
Được đề xuất
Home Automation Controller
Zigbee, Z-Wave, or BLE-equipped home automation controllers use the ATSAMD20J14A-MNT as the central processing unit for translating radio events into lamp, curtain, or HVAC commands. Six SERCOM channels provide UART links to multiple transceivers, while the 12-bit ADC reads analog sensor inputs from thermistors and LDRs. The 16 KB Flash is enough for protocol bridges but limits gateway firmware complexity; choose ATSAMD20J18A-MNT for full Matter-over-Wi-Fi stacks. Sleep modes hit 1.5 uA standby, ideal for always-on battery-backed hubs. Microchip's Harmony 3 middleware supports ZCL and Zigbee Green Power demos to accelerate development, and the 64-pin QFN offers generous GPIO for triac or relay drivers.
Được đề xuất
Low-Voltage Motor Control
The ATSAMD20J14A-MNT can perform closed-loop speed control of small DC or stepper motors in 1.8 V to 3.6 V battery-powered tools. Its 16-bit TCC timer generates PWM with dead-time insertion for H-bridge drivers like DRV8871, and the event system triggers ADC sampling aligned to PWM edges. Cortex-M0+ executes field-oriented control code at modest 48 MHz, handling up to 4 kHz PWM with ADC sync. Six SERCOM channels drive feedback encoders and serial command links, while 12-bit ADC reads current sense resistors. Although 16 KB Flash limits advanced algorithms like sensorless FOC, the part handles trapezoidal commutation and PID control tightly. For more demanding motion control, scale up to ATSAM3X8E on the same ARM-M family architecture.
Được đề xuất
Smart Agriculture Sensor
Remote soil-moisture, pH, or environmental sensor nodes in smart agriculture deployments capitalize on the ATSAMD20J14A-MNT's low-power operation, industrial temperature range, and 1.6 V to 3.6 V supply that pairs with solar-charged Li-SOCl2 cells. The 12-bit ADC reads 4 to 20 mA analog sensor outputs with proper signal conditioning, and six SERCOM channels multiplex UART connections for LoRa modules like RN2903. SleepWalking modes keep idle current below 10 uA, allowing multi-year deployment on a single battery. Microchip's longevity program ensures the part is supported through 2035, critical for agricultural IoT installations that must last a decade. The 64-pin QFN packs substantial I/O for sensor expansion while keeping the bill of materials minimal for high-volume deployments across thousands of acres.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD20J14A-MNT — 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 | ATSAMD20J14A-AUT | ATSAMD20J14A-CNT | ATSAMD20J18A-MNT | ATSAMD20J17A-MNT | ATSAMD20J16A-MNT | ATSAMC21J18A-MUT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (9x9 mm) | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same | 64-pin QFN (9x9 mm) - same |
| Core | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 256 KB | 128 KB | 64 KB | 256 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 32 KB | 16 KB | 8 KB | 32 KB |
| Operating Voltage | 1.6 V - 3.6 V | 1.6 V - 3.6 V | 1.6 V - 3.6 V | 1.6 V - 3.6 V | 1.6 V - 3.6 V | 1.6 V - 3.6 V | 2.7 V - 5.5 V |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C + AEC-Q100 | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +125 C |
| USB | No | No | No | No | No | No | Yes (USB 2.0 FS) |
| Grade | Industrial | Automotive (AEC-Q100) | Industrial | Industrial | Industrial | Industrial | Industrial |
Bảo phân biệt quan trọng
- Drop-in automotive-grade upgrade path (vsATSAMD20J14A-AUT)
- More Flash and SRAM than original (vsATSAMD20J18A-MNT)
- Cross-family migration with USB (vsATSAMC21J18A-MUT)
- Industrial temperature range (vsCommercial temperature grade alternatives)
Ghi chú thiết kế
Estimated: at 48 MHz clock and 3.3 V supply, active current is approximately 7 mA. Add a 1 uF X7R capacitor near the VDD pin and a 10 nF on AVDD; the analog supply must be bypassed separately. Use a separate analog ground plane under the AVDD trace if you have noise-sensitive ADC readings. The brownout detector is fixed at 1.6 V min; if you operate from USB bus power (5 V), add a 3.3 V LDO with at least 50 mA capacity.
The 64-pin QFN (9x9 mm) provides a thermal pad (EP) on pin 64 - this MUST be soldered to a thermal land of at least 1 square inch of 1 oz copper. Without proper thermal pad soldering, the device will throttle or fail at industrial temperatures. Estimated: theta_JA on a 1-square-inch 2-layer board is approximately 35 C/W; with 4-layer 2 oz copper, it drops near 18 C/W. Industrial +105 C operation requires the larger thermal pad.
Do not exceed 3.6 V on VDD; the part has no internal voltage regulator of its own. The crystal oscillator requires a 16 pF loading capacitor - check the specific crystal for the right value, not the standard 12 pF. Setting the DFLL with wrong parameters causes lock failure and forced reset; stick to the CMSIS startup sequence from Microchip Harmony. The 16 KB Flash page is only 256 bytes, so your flash-write code must respect row boundaries or risk silent corruption.
Route the SWD signals (PA30 = SWDIO, PA31 = SWCLK) without stubs and keep trace length below 50 mm. The RESET pin is internally pulled but adding a 10 kohm external pull-up to VDD improves noisy-environment reliability. The exposed pad (EP) at pin 64 must be stitched with at least 8 thermal vias to the bottom ground plane for best thermal dissipation. Avoid routing GPIO traces under the crystal or near the analog supply to minimize coupling.
Thông tin tuân thủ
RoHS compliant per Microchip product page. AEC-Q100 applies only to the -AUT sibling; this MNT variant is industrial grade, not AEC-Q100 qualified.
