ATSAMD21J16B-MFT - 64KB Flash Cortex-M0+ MCU 64-QFN | Microchip
料号： ATSAMD21J16B-MFT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.1 | $310.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.45 | $2,450.00 |
| 3,000 | $2.2 | $6,600.00 |
ATSAMD21J16B-MFT 概述
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.
直接替换替代料： ATSAMD21J16B-MFT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAMD21J16B-MFT （相同外形与封装尺寸） ——差异在于 ADC, Package, Core, Operating Temperature, DAC.
快速对比工具——选择替代料号进行并排对比：
ATSAMD21J15B-MFT
✅ 直接替换✓ 有现货
$2.39 / 个
查看数据手册 →ATSAMD21J18A-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.6 / 个
查看数据手册 →ATSAMD21J16B-AU
✅ 直接替换✓ 有现货
$2.75 / 个
查看数据手册 →ATSAMD21J16B-AUT
✅ 直接替换✓ 有现货
$2.85 / 个
查看数据手册 →ATSAMD21J16B-AF
✅ 直接替换✓ 有现货
$2.52 / 个
查看数据手册 →ATSAMD21G18A-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.61 / 个
查看数据手册 →ATSAMD21J16B-MFT 最大额定值与电气特性
| 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 |
| 工作温度范围 | -40C to +125C |
| 封装 | 64-pin QFN with Exposed Pad (T&R) |
| 安装类型 | 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 |
| RoHS 状态 | Compliant (GREEN) |
| Lead-Free | Yes |
ATSAMD21J16B-MFT 引脚配置
| 引脚 1 | VDDIO — I/O supply voltage |
| 引脚 2 | PA02 — GPIO / ADC0 channel |
| 引脚 3 | PA03 — GPIO / ADC1 channel |
| 引脚 4 | GND — Ground |
| 引脚 5 | PA04 — GPIO / VREF |
| 引脚 6 | PA05 — GPIO / ADC4 |
| 引脚 7 | PA06 — GPIO / ADC5 |
| 引脚 8 | PA07 — GPIO / ADC6 |
| 引脚 9 | VDDIO — I/O supply voltage |
| 引脚 10 | GND — Ground |
| 引脚 11 | PA08 — GPIO / SERCOM0 |
| 引脚 12 | PA09 — GPIO / SERCOM0 |
| 引脚 13 | PA10 — GPIO / SERCOM0 |
| 引脚 14 | PA11 — GPIO / SERCOM0 |
| 引脚 15 | PA12 — GPIO / SERCOM2 |
| 引脚 16 | PA13 — GPIO / SERCOM2 |
| 引脚 17 | PA14 — GPIO / SERCOM2 |
| 引脚 18 | PA15 — GPIO / SERCOM2 |
| 引脚 19 | PA16 — GPIO / SERCOM1 |
| 引脚 20 | PA17 — GPIO / SERCOM1 |
| 引脚 21 | PA18 — GPIO / SERCOM1 |
| 引脚 22 | PA19 — GPIO / SERCOM1 |
| 引脚 23 | PA20 — GPIO / SERCOM3 |
| 引脚 24 | PA21 — GPIO / SERCOM3 |
| 引脚 25 | PA22 — GPIO / SERCOM3 |
| 引脚 26 | PA23 — GPIO / SERCOM3 |
| 引脚 27 | PA24 — GPIO / USB_DM |
| 引脚 28 | PA25 — GPIO / USB_DP |
| 引脚 29 | GND — Ground |
| 引脚 30 | VDDIO — I/O supply voltage |
| 引脚 31 | PA27 — GPIO |
| 引脚 32 | GND — Ground |
| 引脚 33 | PA28 — GPIO / Reset |
| 引脚 34 | PA29 — GPIO |
| 引脚 35 | PA30 — GPIO / SWCLK |
| 引脚 36 | PA31 — GPIO / SWDIO |
| 引脚 37 | PB00 — GPIO |
| 引脚 38 | PB01 — GPIO |
| 引脚 39 | PB02 — GPIO / SERCOM5 |
| 引脚 40 | PB03 — GPIO / SERCOM5 |
| 引脚 41 | PB04 — GPIO / SERCOM5 |
| 引脚 42 | PB05 — GPIO / SERCOM5 |
| 引脚 43 | PB06 — GPIO / SERCOM4 |
| 引脚 44 | PB07 — GPIO / SERCOM4 |
| 引脚 45 | PB08 — GPIO / SERCOM4 |
| 引脚 46 | PB09 — GPIO / SERCOM4 |
| 引脚 47 | PB10 — GPIO |
| 引脚 48 | PB11 — GPIO |
| 引脚 49 | PB12 — GPIO |
| 引脚 50 | PB13 — GPIO |
| 引脚 51 | PB14 — GPIO |
| 引脚 52 | PB15 — GPIO |
| 引脚 53 | PB16 — GPIO |
| 引脚 54 | PB17 — GPIO |
| 引脚 55 | PB18 — GPIO |
| 引脚 56 | PB19 — GPIO |
| 引脚 57 | PB20 — GPIO |
| 引脚 58 | PB21 — GPIO |
| 引脚 59 | PB22 — GPIO |
| 引脚 60 | PB23 — GPIO |
| 引脚 61 | PB24 — GPIO |
| 引脚 62 | PB25 — GPIO |
| 引脚 63 | VDDIN — Main supply voltage |
| 引脚 64 | GND — Ground (also exposed pad) |
典型应用
ATSAMD21J16B-MFT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ATSAMD21J16B-MFT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- On-chip USB 2.0 Full-Speed transceiver without external PHY （对比 ATSAMD20J18A-MNT)
- Industrial -40C to +125C temperature range （对比 ATSAMD21J16B-AU)
- Pin-compatible 256 KB Flash upgrade path （对比 ATSAMD21J18A-MF)
设计说明
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.
合规信息
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.
