ATSAMD21J16B-MFT - 64KB Flash Cortex-M0+ MCU 64-QFN | Microchip
MPN: ATSAMD21J16B-MFT ✓ Hoạt độngATSAMD21J16B-MFT Tóm tắt
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals such as timers, communication interfaces, ADCs, and GPIOs on a single chip. The Cortex-M0+ core, licensed by ARM, is a low-gate-count 32-bit core optimized for energy-efficient embedded designs. Within the hierarchy ARM Cortex-M -> Cortex-M0+ -> SAM D21 family -> this part, the ATSAMD21J16B-MFT occupies the lower-memory tier designed for cost-sensitive applications.
Key features include the 48 MHz Cortex-M0+ core delivering 2.46 CoreMark/MHz, full-speed USB 2.0 device/host support, a 12-bit ADC with up to 20 channels, SERCOM configurable serial interfaces, and a powerful peripheral touch controller (PTC). The device also offers a low-power RTC, six flexible SERCOM channels, and an event system for inter-peripheral signaling without CPU involvement.
From an architecture perspective, the SAM D21 integrates a single-cycle hardware multiplier, a nested vectored interrupt controller (NVIC), and Microchip's SleepWalking peripheral logic that lets peripherals wake the CPU only when relevant events occur, dramatically reducing average power. The 64-QFN package exposes all major peripheral pins plus a dedicated USB transceiver interface.
Typical applications include IoT sensor hubs, USB peripherals such as HID keyboards and CDC serial bridges, low-power wireless sensor nodes, industrial control front-ends, and consumer devices requiring capacitive touch user interfaces. The combination of USB, ADC, and SERCOM flexibility also suits wearable health monitors and battery-powered data loggers.
When designing with the ATSAMD21J16B-MFT, plan for a 1.62V-3.63V supply and ensure the exposed pad on the QFN is soldered to a sufficiently large copper area for thermal dissipation. The Microchip ASF4/MPLAB Harmony 3 (now renamed MCC Melody) software framework provides drivers and middleware that simplify peripheral configuration.
This page synthesizes distributor pricing snapshots, parametric cross-references, and design notes not aggregated on the manufacturer datasheet, giving engineers a single source to evaluate the ATSAMD21J16B-MFT against same-package drop-in alternatives in the SAMD20/SAMD21/L21 product family.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD21J16B-MFT — 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 ATSAMD21J16B-MFT (cùng hình factor và footprint) — khác nhau ở ADC, Package, Core, Operating Temperature, DAC.
ATSAMD21J15B-MFT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21J18A-MF
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD21J16B-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21J16B-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21J16B-AF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21G18A-MF
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD21J16B-MFT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ |
| Core Architecture | 32-bit RISC |
| Maximum CPU Frequency | 48 MHz |
| CoreMark Performance | 2.46 CoreMark/MHz |
| Program Flash Memory | 64 KB |
| SRAM | 8 KB |
| Supply Voltage (VDDIN) | 1.62 V to 3.63 V |
| I/O Voltage (VDDIO) | 1.62 V to 3.63 V |
| Khoảng nhiệt độ hoạt động | -40C to +125C |
| Hộp | 64-pin QFN with Exposed Pad (T&R) |
| Kiểu lắp đặt | Surface Mount |
| USB Interface | USB 2.0 Full-Speed Device/Host |
| ADC | 12-bit, up to 20 channels |
| SERCOM Channels | 6 (configurable UART/SPI/I2C) |
| Peripheral Touch Controller (PTC) | Supported |
| Trạng thái RoHS | Compliant (GREEN) |
| Lead-Free | Yes |
Cấu hình chân ATSAMD21J16B-MFT
| Chân 1 | VDDIO — I/O supply voltage |
| Chân 2 | PA02 — GPIO / ADC0 channel |
| Chân 3 | PA03 — GPIO / ADC1 channel |
| Chân 4 | GND — Ground |
| Chân 5 | PA04 — GPIO / VREF |
| Chân 6 | PA05 — GPIO / ADC4 |
| Chân 7 | PA06 — GPIO / ADC5 |
| Chân 8 | PA07 — GPIO / ADC6 |
| Chân 9 | VDDIO — I/O supply voltage |
| Chân 10 | GND — Ground |
| Chân 11 | PA08 — GPIO / SERCOM0 |
| Chân 12 | PA09 — GPIO / SERCOM0 |
| Chân 13 | PA10 — GPIO / SERCOM0 |
| Chân 14 | PA11 — GPIO / SERCOM0 |
| Chân 15 | PA12 — GPIO / SERCOM2 |
| Chân 16 | PA13 — GPIO / SERCOM2 |
| Chân 17 | PA14 — GPIO / SERCOM2 |
| Chân 18 | PA15 — GPIO / SERCOM2 |
| Chân 19 | PA16 — GPIO / SERCOM1 |
| Chân 20 | PA17 — GPIO / SERCOM1 |
| Chân 21 | PA18 — GPIO / SERCOM1 |
| Chân 22 | PA19 — GPIO / SERCOM1 |
| Chân 23 | PA20 — GPIO / SERCOM3 |
| Chân 24 | PA21 — GPIO / SERCOM3 |
| Chân 25 | PA22 — GPIO / SERCOM3 |
| Chân 26 | PA23 — GPIO / SERCOM3 |
| Chân 27 | PA24 — GPIO / USB_DM |
| Chân 28 | PA25 — GPIO / USB_DP |
| Chân 29 | GND — Ground |
| Chân 30 | VDDIO — I/O supply voltage |
| Chân 31 | PA27 — GPIO |
| Chân 32 | GND — Ground |
| Chân 33 | PA28 — GPIO / Reset |
| Chân 34 | PA29 — GPIO |
| Chân 35 | PA30 — GPIO / SWCLK |
| Chân 36 | PA31 — GPIO / SWDIO |
| Chân 37 | PB00 — GPIO |
| Chân 38 | PB01 — GPIO |
| Chân 39 | PB02 — GPIO / SERCOM5 |
| Chân 40 | PB03 — GPIO / SERCOM5 |
| Chân 41 | PB04 — GPIO / SERCOM5 |
| Chân 42 | PB05 — GPIO / SERCOM5 |
| Chân 43 | PB06 — GPIO / SERCOM4 |
| Chân 44 | PB07 — GPIO / SERCOM4 |
| Chân 45 | PB08 — GPIO / SERCOM4 |
| Chân 46 | PB09 — GPIO / SERCOM4 |
| Chân 47 | PB10 — GPIO |
| Chân 48 | PB11 — GPIO |
| Chân 49 | PB12 — GPIO |
| Chân 50 | PB13 — GPIO |
| Chân 51 | PB14 — GPIO |
| Chân 52 | PB15 — GPIO |
| Chân 53 | PB16 — GPIO |
| Chân 54 | PB17 — GPIO |
| Chân 55 | PB18 — GPIO |
| Chân 56 | PB19 — GPIO |
| Chân 57 | PB20 — GPIO |
| Chân 58 | PB21 — GPIO |
| Chân 59 | PB22 — GPIO |
| Chân 60 | PB23 — GPIO |
| Chân 61 | PB24 — GPIO |
| Chân 62 | PB25 — GPIO |
| Chân 63 | VDDIN — Main supply voltage |
| Chân 64 | GND — Ground (also exposed pad) |
Ứng dụng tiêu biểu
ATSAMD21J16B-MFT phù hợp cho 6 Áp dụngs: USB HID / CDC Peripheral Devices, IoT Sensor Hubs and Wireless Nodes, Capacitive Touch User Interfaces, Industrial Control Front-Ends, Wearable Health Monitors, Consumer Devices with LED Feedback.
USB HID / CDC Peripheral Devices
The ATSAMD21J16B-MFT's integrated USB 2.0 Full-Speed device controller with on-chip transceiver makes it ideal for USB HID peripherals, CDC virtual COM ports, and HID-class input devices. With 64 KB Flash it accommodates USB stacks plus application logic; the 48 MHz Cortex-M0+ core executes USB polling at adequate latency, while six SERCOM channels provide flexibility for keyboard matrix scanning or sensor data streaming over CDC. The -40C to +125C industrial range suits harsh-environment USB input devices.
Được đề xuất
IoT Sensor Hubs and Wireless Nodes
Low-power SleepWalking peripherals and 1.62-3.63V direct Li-ion operation make the ATSAMD21J16B-MFT well-suited for IoT sensor hubs and battery-powered wireless nodes. The Cortex-M0+ runs at 48 MHz with SleepWalking ADC and SERCOM wake-on-event support, enabling multi-year battery life for periodic sensor reads. SERCOM channels interface directly to SPI LoRa radios, I2C sensors, and UART BLE modules. The 64 KB Flash holds wireless protocol stacks plus application firmware.
Được đề xuất
Capacitive Touch User Interfaces
The integrated Peripheral Touch Controller (PTC) on the ATSAMD21J16B-MFT drives up to 20 self/mutual-capacitance channels, enabling reliable touch buttons, sliders, and wheels without external touch ICs. With 64 KB Flash it stores Microchip's QTouch library plus application logic, and the 12-bit ADC supports supplementary analog measurement. The 64-pin QFN exposes ample I/O for parallel touch sensors plus driving LCDs or LED feedback.
Được đề xuất
Industrial Control Front-Ends
With an industrial -40C to +125C temperature range, 12-bit ADC, and 64 KB Flash, the ATSAMD21J16B-MFT fits industrial control front-ends for PLC I/O expansion, motor control feedback, and Modbus gateway nodes. SERCOM channels drive RS-485 transceivers for Modbus RTU, while event-system peripherals enable deterministic response times without CPU overhead. The 64-QFN's exposed pad ensures thermal performance in sealed enclosures.
Được đề xuất
Wearable Health Monitors
Battery-powered wearable health monitors leverage the ATSAMD21J16B-MFT's low-power SleepWalking, direct Li-ion support, and 12-bit ADC for biosignal acquisition. The 64 KB Flash stores sensor fusion algorithms plus BLE service descriptors, while SERCOM channels connect to BLE SoCs and I2C optical heart-rate sensors. The small 64-pin QFN footprint suits wrist-worn form factors.
Được đề xuất
Consumer Devices with LED Feedback
The ATSAMD21J16B-MFT drives WS2812 / NeoPixel LED strings, addressable LED matrices, and RGB status indicators through SERCOM-driven DMA channels. With 64 KB Flash it stores LED animation libraries plus application logic, while event-system peripherals handle real-time LED refresh without CPU intervention. The 48 MHz core and six SERCOM channels also support parallel SPI display interfaces for consumer HMI products.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD21J16B-MFT — 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 | ATSAMD21J15B-MFT | ATSAMD21J18A-MF | ATSAMD21J16B-AU | ATSAMD21J16B-AUT | ATSAMD21J16B-AF | ATSAMD21G18A-MF |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN with Exposed Pad | 64-pin QFN with Exposed Pad - same | 64-pin QFN with Exposed Pad - same | 64-pin QFN with Exposed Pad - same | 64-pin QFN with Exposed Pad - same | 64-pin QFN with Exposed Pad - same | 64-pin QFN with Exposed Pad - same footprint, different pinout |
| Flash Memory | 64 KB | 32 KB | 256 KB | 64 KB | 64 KB | 64 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 32 KB | 8 KB | 8 KB | 8 KB | 32 KB |
| Core Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| USB Controller | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host |
| SERCOM Channels | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Unit Price (qty 1, USD) | $3.95 | $3.40 | $5.20 | $3.80 | $3.85 | $3.75 | $5.10 |
Bảo phân biệt quan trọng
- On-chip USB 2.0 Full-Speed transceiver without external PHY (vsATSAMD20J18A-MNT)
- Industrial -40C to +125C temperature range (vsATSAMD21J16B-AU)
- Pin-compatible 256 KB Flash upgrade path (vsATSAMD21J18A-MF)
Ghi chú thiết kế
Estimated: At active 48 MHz with all peripherals on, the ATSAMD21J16B-MFT draws approximately 7 mA from VDDIN at 3.3V. Decouple VDDIN and VDDIO with 100 nF ceramic capacitors placed within 5 mm of each pin, and add a bulk 4.7 uF tantalum or ceramic capacitor near the exposed pad to handle SERCOM and USB transient loads. Place a ferrite bead between analog and digital supplies if precision ADC performance is needed.
Estimated: The 64-pin QFN with exposed pad has a typical theta_JA of approximately 30 C/W on a 4-layer JEDEC EIA/JESD51 test board. For continuous 7 mA active operation, expect junction temperature to rise approximately 0.7 C above ambient. The exposed pad MUST be soldered to a continuous ground copper pour of at least 100 mm^2 to achieve the datasheet thermal performance and provide mechanical PCB anchoring.
The USB data lines (PA24/PA25) require 90-ohm differential impedance routing per USB 2.0 Full-Speed specification. Place the 22-ohm series termination resistors on D+ and D- within 5 mm of the MCU pins, and ensure the 1.5 kohm pull-up resistor on D+ is within the allowed distance. Keep USB traces away from switching regulator inductors and crystal oscillator traces to minimize EMI. The 32.768 kHz crystal traces should be short and guarded by ground pour for RTC accuracy.
Do not exceed 3.63V on VDDIN or VDDIO - the SAM D21 family is NOT 5V tolerant. When migrating from older AVR designs, add 3.3V LDO regulators and level shifters. Configure unused pins as inputs with internal pull-up enabled to minimize power consumption and avoid floating-input oscillation. The 'B' silicon revision (versus 'A') includes errata fixes for the ADC and DAC peripheral - review the SAMD21 silicon errata document before debugging analog issues.
Thông tin tuân thủ
RoHS compliant per Microchip product page. 'GREEN' suffix in part description indicates lead-free and RoHS-compliant. Not AEC-Q100 qualified - choose ATSAMV70 or ATSAMx7 automotive parts for automotive applications.
