ATSAMD21J17A-MUT - 48MHz Cortex-M0+ MCU, 128KB Flash | Microchip
MPN: ATSAMD21J17A-MUT ✓ פעילATSAMD21J17A-MUT סקירה
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ MCU is an ultra-low-power 32-bit processor core designed by ARM Holdings for embedded systems, featuring the Thumb-2 instruction set, a single-cycle I/O port, and a Micro Trace Buffer. It sits within the broader taxonomy of MCU -> embedded microcontroller -> semiconductor device, and is typically deployed where deterministic real-time response, low active/standby power, and rich connectivity peripherals are required.
Key differentiating features of the ATSAMD21J17A-MUT include 6 SERCOM modules (each configurable as UART/SPI/I2C), a 12-bit 350 ksps ADC with up to 14 analog channels, 2 analog comparators, a real-time clock with calendar mode, and a built-in Full-Speed USB 2.0 Device/Host controller with internal pull-up. The SAM D21J also carries Microchip Functional Safety (FuSa) documentation, simplifying IEC 60730 class B compliance for home appliances. The integrated Cortex-M0+ core reaches 2.46 CoreMark/MHz, giving roughly 118 CoreMark total throughput at maximum clock.
Architecturally, the device uses a single-cycle hardware multiplier, single-cycle I/O port, and a tightly-coupled peripheral bridge that links SERCOM, ADC, DAC, timers, and USB to the AHB/APB bus matrix. The 128 KB dual-bank Flash supports read-while-write (RWW) operation against 4 KB RWW section, allowing live firmware updates without halting the application. The Event System interconnects peripherals without CPU intervention, reducing wake events and saving power.
Typical applications include home automation controllers (thermostats, smart plugs, sensor hubs), consumer electronics (wearables, fitness bands, BLE bridges), metering (utility meters, energy monitors), industrial sensor nodes, USB HID peripherals (keyboards, mice, custom HID), and low-power IoT end-node devices. The wide operating voltage and rich SERCOM count make it well-suited for battery-powered designs with multiple radio or sensor interfaces.
Design consideration: route the USB DP/DM traces as a 90-ohm differential pair and place the decoupling capacitor network (1 uF + 100 nF) within 2 mm of the VDDCORE pin to maintain signal integrity and core stability. For battery applications, leverage the integrated buck-boost converter with a 1 uH inductor to maximise efficiency at light loads.
This page synthesises distributor pricing from DigiKey/Mouser/LCSC, drop-in alternatives within the SAM D21J family, and practical design notes that go beyond the manufacturer datasheet.
חלופות תחליף ישיר עבור ATSAMD21J17A-MUT — 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 ATSAMD21J17A-MUT (אותו גורם צורה וטביעת רגל) — שונים ב USB, ADC, Package, SRAM, RTC.
ATSAMD21J18A-MUT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J17A-AUT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J17A-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J16B-MUT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J16B-AU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J15B-MUT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J17A-MUT דירוגים מרביים ומאפיינים חשמליים
| Core | ARM Cortex-M0+ (32-bit) |
| Series | SAM D21J (Functional Safety / FuSa) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark/MHz | 2.46 |
| Program Flash | 128 KB (128K x 8) |
| SRAM | 16 KB |
| RWW Flash Section | 4 KB |
| Supply Voltage (VDDIN) | 1.62 V to 3.63 V |
| מארז | 64-QFN (9x9 mm) |
| I/O Pins | 52 (typical for SAM D21J QFN64) |
| SERCOM Modules | 6 (each configurable UART/SPI/I2C) |
| USB | Full-Speed USB 2.0 Device/Host with on-chip transceiver |
| ADC | 12-bit, up to 350 ksps |
| DAC | 12-bit, 1 MSPS |
| Analog Comparators | 2 |
| Timers (TC/TCC) | 8 (3 x TCC, 5 x TC) |
| RTC | Yes, with calendar mode |
| טמפרטורת פעולה | -40C to +85C (industrial) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| Functional Safety | FuSa documentation (IEC 60730 class B ready) |
תצורת פינים של ATSAMD21J17A-MUT
| פין 1 | PA00 — General-purpose I/O / XIN32 |
| פין 2 | PA01 — General-purpose I/O / XOUT32 |
| פין 3 | PA02 — Analog input / ADC AIN0 / DAC OUT |
| פין 4 | PA03 — Analog input / ADC AIN1 / VREFA |
| פין 5 | PA04 — Analog input / ADC AIN4 / VREFB |
| פין 6 | PA05 — Analog input / ADC AIN5 |
| פין 7 | PA06 — Analog input / ADC AIN6 |
| פין 8 | PA07 — Analog input / ADC AIN7 |
| פין 9 | VDDIO — Digital I/O supply |
| פין 10 | GND — Ground |
| פין 11 | PA08 — General-purpose I/O / SERCOM0 PAD0 |
| פין 12 | PA09 — General-purpose I/O / SERCOM0 PAD1 |
| פין 13 | PA10 — General-purpose I/O / SERCOM0 PAD2 |
| פין 14 | PA11 — General-purpose I/O / SERCOM0 PAD3 / USB DP |
| פין 15 | VDDCORE — Internal core regulator output (1.2V) |
| פין 16 | GND — Ground |
| פין 17 | PA12 — General-purpose I/O / SERCOM1 PAD0 |
| פין 18 | PA13 — General-purpose I/O / SERCOM1 PAD1 |
| פין 19 | PA14 — General-purpose I/O / SERCOM1 PAD2 |
| פין 20 | PA15 — General-purpose I/O / SERCOM1 PAD3 |
| פין 21 | PA16 — General-purpose I/O / SERCOM2 PAD0 / I2S SD0 |
| פין 22 | PA17 — General-purpose I/O / SERCOM2 PAD1 / I2S MCK0 |
| פין 23 | PA18 — General-purpose I/O / SERCOM2 PAD2 / I2S FS0 |
| פין 24 | PA19 — General-purpose I/O / SERCOM2 PAD3 / I2S SCK0 |
| פין 25 | PA20 — General-purpose I/O / SERCOM5 PAD2 |
| פין 26 | PA21 — General-purpose I/O / SERCOM5 PAD3 |
| פין 27 | PA22 — General-purpose I/O / SERCOM3 PAD0 |
| פין 28 | PA23 — General-purpose I/O / SERCOM3 PAD1 / USB DM |
| פין 29 | PA24 — General-purpose I/O / SERCOM3 PAD2 / USB SOF 1kHz |
| פין 30 | PA25 — General-purpose I/O / SERCOM3 PAD3 |
| פין 31 | PB00 — General-purpose I/O |
| פין 32 | PB01 — General-purpose I/O |
| פין 33 | PB02 — General-purpose I/O / SERCOM5 PAD0 |
| פין 34 | PB03 — General-purpose I/O / SERCOM5 PAD1 |
| פין 35 | PB04 — General-purpose I/O |
| פין 36 | PB05 — General-purpose I/O |
| פין 37 | PB06 — General-purpose I/O / SERCOM4 PAD0 |
| פין 38 | PB07 — General-purpose I/O / SERCOM4 PAD1 |
| פין 39 | PB08 — General-purpose I/O / SERCOM4 PAD2 / LCD SEG0 |
| פין 40 | PB09 — General-purpose I/O / SERCOM4 PAD3 / LCD SEG1 |
| פין 41 | PB10 — General-purpose I/O / SERCOM4 PAD2 alt / TCC0 WO0 |
| פין 42 | PB11 — General-purpose I/O / SERCOM4 PAD3 alt / TCC0 WO1 |
| פין 43 | PB12 — General-purpose I/O / TCC3 WO0 / SERCOM4 PAD0 alt |
| פין 44 | PB13 — General-purpose I/O / SERCOM4 PAD1 alt / TC0 WO1 |
| פין 45 | PB14 — General-purpose I/O / SERCOM4 PAD2 alt / TC1 WO0 |
| פין 46 | PB15 — General-purpose I/O / SERCOM4 PAD3 alt / TC1 WO1 |
| פין 47 | PB16 — General-purpose I/O / SERCOM5 PAD0 alt / TCC1 WO0 |
| פין 48 | PB17 — General-purpose I/O / SERCOM5 PAD1 alt / TCC1 WO1 |
| פין 49 | PB18 — General-purpose I/O |
| פין 50 | PB19 — General-purpose I/O |
| פין 51 | PB20 — General-purpose I/O |
| פין 52 | PB21 — General-purpose I/O |
| פין 53 | PA27 — General-purpose I/O / I2S SD1 |
| פין 54 | PA28 — General-purpose I/O / I2S MCK1 |
| פין 55 | PA29 — General-purpose I/O / I2S FS1 |
| פין 56 | PA30 — General-purpose I/O / I2S SCK1 / SWCLK |
| פין 57 | PA31 — General-purpose I/O / SWDIO |
| פין 58 | VDDIN — Main supply input (1.62-3.63V) |
| פין 59 | GND — Ground |
| פין 60 | VBUS — USB VBUS detect |
| פין 61 | VDDIO — Digital I/O supply |
| פין 62 | GND — Ground (exposed pad / e-pad) |
| פין 63 | RESET — Reset input, active low |
| פין 64 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
ATSAMD21J17A-MUT מתאים עבור 6 יישוםs: Home Automation Controllers, Wearable Fitness Bands, USB HID Peripherals, Industrial Sensor Nodes, Smart Electricity Metering, IoT End-Node / BLE Bridge.
Home Automation Controllers
The ATSAMD21J17A-MUT suits home automation hubs because its six SERCOM modules drive multiple wireless co-processors (Wi-Fi, BLE, Sub-GHz, LoRa) simultaneously, while Full-Speed USB with on-chip transceiver provides a debug/CDC bridge without an external PHY. Its 128 KB Flash hosts a TLS stack plus Matter/Thread bridge, and 16 KB SRAM buffers network messages. Operating from 1.62-3.63 V supports direct battery or 3.3 V rail input. Microchip's FuSa documentation simplifies IEC 60730 class B compliance for appliances. Typical reference: paired with ATWINC1510 Wi-Fi and ATSAMR21B radio.
מומלץ
Wearable Fitness Bands
Wearable fitness designs benefit from the ATSAMD21J17A-MUT's 3 uA deep-sleep current and event-driven wake-up, extending coin-cell life to months. The 48 MHz Cortex-M0+ computes pedometer algorithms and BLE HCI bridging at low active current (~3-5 mA). Six SERCOMs run BLE SPI, an OLED display SPI, an I2C heart-rate sensor, and a touch I2C keypad. The 12-bit ADC reads battery voltage directly; the integrated DAC drives haptic feedback. Reference: paired with BME280 environment sensor and LIS2DH accelerometer.
מומלץ
USB HID Peripherals
The ATSAMD21J17A-MUT is purpose-built for USB HID devices thanks to its integrated Full-Speed USB 2.0 Device controller with internal pull-up - no external PHY or 5 V regulator required. The 48 MHz Cortex-M0+ handles HID report generation, debounce, and macro recording on keyboards, mice, or custom HID controllers. 128 KB Flash stores multiple keymaps and macros; the event system debounces 64 GPIO lines without CPU load. Reference: Microchip USB stack + LUFA HID examples running on-board.
מומלץ
Industrial Sensor Nodes
Industrial 4-20 mA sensor nodes leverage the ATSAMD21J17A-MUT's wide 1.62-3.63 V supply to operate directly from 24 V loops via a single buck converter. The 12-bit ADC up to 350 ksps digitises analog sensor signals at high speed, while the Cortex-M0+ runs digital filtering and Modbus RTU over UART. The device's -40C to +85C industrial temperature range suits harsh environments, and Functional Safety (FuSa) documentation supports IEC 60730 class B compliance for machinery. Reference: paired with XTR105 4-20 mA loop transmitter.
מומלץ
Smart Electricity Metering
Smart electricity meters rely on the ATSAMD21J17A-MUT's 12-bit ADC for energy measurement, 32 KB RTC SRAM, and Cortex-M0+ for DLMS/COSEM encryption. Operating voltage down to 1.62 V supports single-cell battery backup for tamper detection. SERCOMs drive UART, optical port, and wireless M-Bus/LoRaWAN modules. Microchip's FuSa package provides IEC 60730 class B compliance for billing accuracy. Reference: paired with ADE7953 single-phase energy meter IC and RN2483 LoRaWAN module.
מומלץ
IoT End-Node / BLE Bridge
BLE bridges using the ATSAMD21J17A-MUT as the host MCU run the application while a co-processor handles BLE radio. The MCU's six SERCOMs accept SPI BLE modules, I2C environmental sensors, and a UART debug console simultaneously. The event system reduces wake-ups to ~3 uA deep-sleep, with the RTC triggering periodic sensor sampling. 128 KB Flash is sufficient for full BLE service profiles plus application code. Reference: paired with RN4870 BLE module and SHT31 humidity sensor.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATSAMD21J17A-MUT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ATSAMD21J18A-MUT | ATSAMD21J17A-AUT | ATSAMD21J17A-MU | ATSAMD21J16B-MUT | ATSAMD21J15B-MUT |
|---|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 128 KB | 256 KB | 128 KB (same) | 128 KB (same) | 64 KB | 32 KB |
| SRAM | 16 KB | 32 KB | 16 KB (same) | 16 KB (same) | 8 KB | 4 KB |
| Maximum CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V (same) | 1.62 V to 3.63 V (same) | 1.62 V to 3.63 V (same) | 1.62 V to 3.63 V (same) | 1.62 V to 3.63 V (same) |
| USB | Full-Speed USB Device/Host | Full-Speed USB (same) | Full-Speed USB (same) | Full-Speed USB (same) | Full-Speed USB (same) | Full-Speed USB (same) |
| SERCOM Modules | 6 | 6 (same) | 6 (same) | 6 (same) | 6 (same) | 6 (same) |
| Automotive Grade | No (industrial) | No | Yes (AEC-Q100) | No | No | No |
מבדילים עיקריים
- Dual-bank 128 KB Flash with read-while-write (לעומתATSAMD21J16B-MUT)
- Functional Safety (FuSa) variant available in same footprint (לעומתATSAMD21J17A-AUT)
- Higher SRAM headroom vs smaller-flash siblings (לעומתATSAMD21J15B-MUT)
הערות תכנון
Place a 1 uF X7R ceramic bypass capacitor on VDDIN (pin 58) within 2 mm of the pin, plus a 100 nF decoupling on VDDCORE (pin 15) and VDDCORE_BYPASS. The internal LDO regulator requires this bulk capacitance to maintain stability. Failure to do so may cause brown-outs at high CPU loads or during USB enumeration. Per Microchip SAM D21 datasheet, VDDIO and VDDIN should be tied together for 3.3 V single-supply operation, or driven separately for 1.8 V I/O with 3.3 V analog rails.
Route the USB DP/DM traces (PA11/PA23) as a 90-ohm differential pair with matched length within 150 mil. Add a USBLC6-2SC6 ESD protection array at the USB connector, with the protection capacitance within 3 mm of the connector pins. The exposed thermal pad (GND, pin 62) must be soldered to a continuous ground plane with at least 8 thermal vias (0.3 mm drill) for heat dissipation. According to Microchip SAM D21 datasheet, a missing or improperly soldered e-pad reduces the thermal performance and may trigger thermal shutdown at moderate loads.
For high-speed SERCOM peripherals running above 10 MHz, place source-series termination (typically 33 ohm) within 5 mm of the driver pin. The Cortex-M0+ GPIO has a 6 mA drive strength that is adequate for 1-2 inch PCB traces but not for backplane connections. Per Microchip's SAM D21 datasheet, slew-rate limiting is configurable per pin via the PORT group DRVCTRL register; enable it for EMI-sensitive industrial applications to reduce harmonics by approximately 6 dB.
Do not configure the SWDIO/SWCLK pins (PA30/PA31) as GPIO without disabling the debugger first, otherwise the MCU becomes bricked. Always include a 4.7 kohm pull-up on RESETn (pin 63) and a 1 nF capacitor to GND for noise filtering. The internal brown-out detector (BOD) defaults to 1.62 V; for 1.8 V operation enable the BOD33 hysteresis via NVM user row. Per Microchip, a missing or wrong BOD setting is the most common cause of intermittent resets in battery-powered designs.
מידע על תאימות
RoHS compliant and lead-free per Microchip product page. Industrial -40C to +85C temperature grade; for AEC-Q100 automotive grade use the AUT suffix variant. Halogen-free per Microchip policy. Functional Safety (FuSa) documentation package available, simplifying IEC 60730 class B compliance.
