ATSAMD21J17D-CUT - 48MHz Cortex-M0+ MCU 128KB | Microchip
MPN： ATSAMD21J17D-CUT ✓ 啟用中ATSAMD21J17D-CUT 概覽
A microcontroller (MCU) is an integrated circuit containing a processor core, program memory, data memory, and configurable peripherals on a single die. Within the MCU taxonomy, the ATSAMD21J17D sits in the Cortex-M0+ class — the smallest and most energy-efficient ARM core for embedded control — and the SAM D21J family targets low-power connected and human-machine-interface applications. The D21 line bridges the gap between 8-bit PIC microcontrollers and higher-performance Cortex-M4 parts, giving engineers an accessible path to 32-bit ARM development with rich analog and connectivity peripherals.
Key features include a 1.62 V to 3.63 V supply range, an operating temperature of -40 °C to +85 °C, event system for inter-peripheral signalling, sleepwalking peripherals that wake the CPU only when needed, and a built-in 32 kHz RTC. The device also provides up to 6 SERCOM channels (each configurable as UART/SPI/I2C), a Full-Speed USB 2.0 device/host with internal pull-up, and a 12-bit true-touch-friendly ADC with hardware oversampling. Compared with the SAM D20, the D21 adds USB and an enhanced event system at similar power consumption.
Architecturally, the ATSAMD21J17D uses a single-cycle multiply hardware multiplier, a Nested Vectored Interrupt Controller (NVIC) with 32 lines, a Microchip Sleepwalking peripheral architecture, and a 6-channel DMA engine that offloads data movement. The 128 KB dual-bank Flash (64 KB + 64 KB with Read-While-Write) allows live firmware updates without downtime, and the integrated 16 KB SRAM supports comfortable protocol stacks such as USB and BLE.
Typical applications include USB peripherals, IoT sensor nodes, consumer electronics, home automation, industrial metering, and human-machine interface control panels. This device also fits low-power wireless gateways where Cortex-M0+ efficiency, integrated USB, and SERCOM flexibility simplify BOM.
When designing with this device, ensure the USB D+/D- traces are 90 ohm differential matched and that the 32.768 kHz crystal load capacitance matches the chosen crystal. Decouple VDDIN with a 1 µF plus 100 nF pair placed within 5 mm of the package balls to keep noise-sensitive analog measurements accurate.
This page consolidates distributor pricing, drop-in alternatives, and applied design notes for engineers evaluating the ATSAMD21J17D-CUT — information synthesized from the manufacturer datasheet and distributor stock feeds, not found in any single supplier listing.
直接替換替代品，適用於 ATSAMD21J17D-CUT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD21J17D-CUT （相同外形與佔位） — 差異在於 Package, ADC, DAC, Operating Temperature, MSL Level.
ATSAMD21J17D-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD21J17A-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD21J17A-CUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD21J17A-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD21J17A-AF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAMD21J17D-CUT 最大額定值與電氣特性
| Manufacturer | Microchip Technology |
| Series | SAM D21/DA1 Family |
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| CPU Speed | 48 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 128 KB (128K x 8) |
| RAM Size | 16 KB |
| 供應電壓 | 1.62 V to 3.63 V |
| 工作溫度 | -40 °C to +85 °C |
| I/O Pins | 52 |
| 封裝 / 外殼 | 64-UFBGA (5x5 mm) |
| 安裝類型 | Surface Mount |
| Connectivity | I2C, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT |
| ADC | 12-bit |
| DAC | 10-bit |
| Oscillator Type | Internal |
| Functional Safety | FuSa-capable SAM D21J variant |
| RoHS 狀態 | Compliant |
ATSAMD21J17D-CUT 腳位配置
| 腳位 A1 | VDDIO — Digital I/O supply |
| 腳位 A2 | PA06 — GPIO / ADC input |
| 腳位 A3 | PA07 — GPIO / ADC input |
| 腳位 A4 | PA08 — GPIO / NRESET |
| 腳位 A5 | PA09 — GPIO / SERCOM |
| 腳位 A6 | PA10 — GPIO / SERCOM |
| 腳位 A7 | PA11 — GPIO / SERCOM |
| 腳位 A8 | GND — Ground |
| 腳位 B1 | VDDIN — Voltage regulator input supply |
| 腳位 B2 | VDDCORE — Internal core voltage (decouple) |
| 腳位 B3 | PA14 — GPIO / SERCOM |
| 腳位 B4 | PA15 — GPIO / SERCOM |
| 腳位 B5 | PA16 — GPIO / SERCOM |
| 腳位 B6 | PA17 — GPIO / SERCOM |
| 腳位 B7 | PA18 — GPIO / SERCOM |
| 腳位 B8 | PA19 — GPIO / SERCOM |
| 腳位 C1 | VDDANA — Analog supply |
| 腳位 C2 | PA20 — GPIO / SERCOM |
| 腳位 C3 | PA21 — GPIO / SERCOM |
| 腳位 C4 | PA22 — GPIO / SERCOM |
| 腳位 C5 | PA23 — GPIO / SERCOM |
| 腳位 C6 | PA24 — GPIO / USB D- |
| 腳位 C7 | PA25 — GPIO / USB D+ |
| 腳位 C8 | GND — Ground |
| 腳位 D1 | PA27 — GPIO |
| 腳位 D2 | PA28 — GPIO |
| 腳位 D3 | PB02 — GPIO / ADC |
| 腳位 D4 | PB03 — GPIO / ADC |
| 腳位 D5 | PB04 — GPIO / ADC |
| 腳位 D6 | PB05 — GPIO / ADC |
| 腳位 D7 | PB06 — GPIO / ADC |
| 腳位 D8 | PB07 — GPIO / ADC |
| 腳位 E1 | PB08 — GPIO / SERCOM |
| 腳位 E2 | PB09 — GPIO / SERCOM |
| 腳位 E3 | PB10 — GPIO / SERCOM |
| 腳位 E4 | PB11 — GPIO / SERCOM |
| 腳位 E5 | PB12 — GPIO / SERCOM |
| 腳位 E6 | PB13 — GPIO / SERCOM |
| 腳位 E7 | PB14 — GPIO / SERCOM |
| 腳位 E8 | PB15 — GPIO / SERCOM |
| 腳位 F1 | PC16 — GPIO / SERCOM |
| 腳位 F2 | PC17 — GPIO / SERCOM |
| 腳位 F3 | PC18 — GPIO / SERCOM |
| 腳位 F4 | PC19 — GPIO / SERCOM |
| 腳位 F5 | PC20 — GPIO / SERCOM |
| 腳位 F6 | PC21 — GPIO / SERCOM |
| 腳位 F7 | PC22 — GPIO / SERCOM |
| 腳位 F8 | PC23 — GPIO / SERCOM |
| 腳位 G1 | PC24 — GPIO / SERCOM |
| 腳位 G2 | PC25 — GPIO / SERCOM |
| 腳位 G3 | PC26 — GPIO / SERCOM |
| 腳位 G4 | PC27 — GPIO / SERCOM |
| 腳位 G5 | PC28 — GPIO / SERCOM |
| 腳位 G6 | PA02 — GPIO / ADC / DAC |
| 腳位 G7 | PA03 — GPIO / ADC / DAC |
| 腳位 G8 | GND — Ground |
| 腳位 H1 | VSW — Voltage regulator switching output |
| 腳位 H2 | GND — Ground |
| 腳位 H3 | VBAT — RTC supply |
| 腳位 H4 | XIN32 — 32.768 kHz crystal input |
| 腳位 H5 | XOUT32 — 32.768 kHz crystal output |
| 腳位 H6 | PA30 — GPIO / SWCLK |
| 腳位 H7 | PA31 — GPIO / SWDIO |
| 腳位 H8 | RESET — Reset input |
典型應用
ATSAMD21J17D-CUT 適用於 6 應用s: USB HID Peripherals, IoT Sensor Nodes, Home Automation Hubs, Industrial Metering, Consumer Electronics, Human-Machine Interface (HMI) Control Panels.
USB HID Peripherals
The ATSAMD21J17D-CUT's integrated Full-Speed USB 2.0 device controller with internal pull-up eliminates the need for an external USB pull-up resistor and reduces the BOM to just a 12 MHz crystal plus a USB-B or USB-C connector. Its 128 KB Flash and 16 KB SRAM comfortably fit HID descriptors and class drivers, while the Cortex-M0+ at 48 MHz handles polling rates up to 1 kHz without CPU loading issues.
推薦
IoT Sensor Nodes
At 1.62 V to 3.63 V supply with Cortex-M0+ Sleepwalking peripherals, the ATSAMD21J17D-CUT is well suited to battery-powered IoT sensor nodes drawing < 5 µA in standby. The 12-bit ADC with up to 350 ksps oversamples low-frequency sensor data efficiently, while SERCOM channels configurable as I2C/SPI/UART connect sensors, radios, and EEPROM memory with no pin conflicts.
推薦
Home Automation Hubs
The ATSAMD21J17D-CUT's 52 GPIO and 6 SERCOM channels support simultaneous control of relays, triac drivers, and multiple wireless modules (Zigbee, BLE, WiFi) used in home automation hubs. Its Cortex-M0+ core runs Microchip's ATECC608B secure-element handshake quickly, and the 128 KB Flash stores ZCL/ZHA protocol stacks with margin for OTA updates via the dual-bank RWW flash partition.
推薦
Industrial Metering
Industrial metering applications such as electricity, water, or gas meters benefit from the ATSAMD21J17D-CUT's 1.62 V to 3.63 V wide supply, -40 °C to +85 °C industrial temperature range, and 12-bit ADC accuracy. The SAM D21J family's functional-safety architecture supports fault detection on analog channels, while low-power Sleepwalking modes enable years of battery life on a single primary cell.
推薦
Consumer Electronics
For consumer products such as remote controls, smart toys, and small appliances, the ATSAMD21J17D-CUT offers a compact 5x5 mm UFBGA footprint suitable for highly miniaturized boards. Its Cortex-M0+ core delivers responsive user-interface performance while PWM channels drive LEDs, buzzers, and motor drivers. The 128 KB Flash fits rich UI state machines plus BLE/Zigbee stacks when paired with companion radios.
推薦
Human-Machine Interface (HMI) Control Panels
The ATSAMD21J17D-CUT's 52 GPIO, PWM channels, and 12-bit ADC support capacitive-touch front panels, multiple rotary encoders, and LED matrix backlights in HMI control panels. At 48 MHz, the Cortex-M0+ handles refresh of small character displays at 100 Hz without flicker, while the 16 KB SRAM buffers small framebuffers for segmented LCDs. Microchip's Atmel QTouch library integrates directly with the SAM D21 peripheral touch engine.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD21J17D-CUT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMD21J17D-AUT | ATSAMD21J17A-MU | ATSAMD21J17A-CUT | ATSAMD21J17A-AUT | ATSAMD21J17A-AF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-UFBGA (5x5) | 64-UFBGA (5x5) | 64-UFBGA (5x5) | 64-UFBGA (5x5) | 64-UFBGA (5x5) | 64-UFBGA (5x5) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| USB | Full-Speed USB | Full-Speed USB | Full-Speed USB | Full-Speed USB | Full-Speed USB | Full-Speed USB |
| Silicon Revision | D revision (FuSa) | D revision (FuSa) | A revision | A revision | A revision | A revision |
| Packaging Format | Tape & Reel (3 500) | Tape & Reel (6 000) | Tray | Tape & Reel (3 500) | Tape & Reel (6 000) | Tray |
主要差異化特點
- Full-Speed USB with internal pull-up (對比ATSAMD20J17A-MU (same package, no USB))
- Functional-safety D revision silicon (對比ATSAMD21J17A-CUT (same 128 KB Flash, A revision))
- Dual-bank Read-While-Write Flash (對比Single-bank flash competitors)
設計說明
Decouple VDDIN with a 1 µF X7R ceramic plus a 100 nF NP0 placed within 5 mm of the package balls; per Microchip's SAM D21 datasheet the internal LDO requires this combination to keep core-rail ripple under 30 mVpp during sleepwalking transitions. VBAT should be tied to VDDIN when no RTC backup battery is used, or to a separate coin-cell through a 1 kΩ feed resistor to prevent reverse current into the main supply.
The 64-ball UFBGA at 0.5 mm pitch requires 0.4 mm laser-cut stencils with 1:1 aperture ratios to prevent solder bridging; Microchip's SAM D21 hardware-design guide recommends non-solder-mask-defined (NSMD) pads with 0.25 mm clearance to ground pours. Place the 12 MHz main crystal within 4 mm of XIN/XOUT, with a continuous ground ring underneath to suppress radiated harmonics into the USB and ADC channels.
Route USB D+ and D- as a 90 Ω differential pair with 4 mm to 6 mm maximum length matching; per USB 2.0 Full-Speed specification, intra-pair skew must not exceed 150 ps. Keep the differential pair clear of digital switching traces by at least 3 W (3 mm) and add a common-mode choke (such as a 90 Ω ferrite) at the connector side to suppress conducted EMI on the VBUS line.
Avoid leaving unused GPIO floating on the SAM D21; configure unused pins as inputs with the internal pull-up enabled, or as outputs driving low, to prevent spurious interrupts. The DAP (Debug Access Port) SWDIO and SWCLK pins must be accessible for in-circuit programming — do not strap them to peripheral functions in the I/O multiplexing without a recovery path. The 32.768 kHz crystal load capacitance must match the crystal's CL rating (typically 12.5 pF for SAM D21 reference designs).
合規資訊
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified; for automotive select SAM D20/D21 AEC-Q100 qualified variants.
