ATSAMD20J16A-MU - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMD20J16A-MU ✓ פעילATSAMD20J16A-MU סקירה
A microcontroller (MCU) is a single-chip computer that combines a CPU core, RAM, non-volatile program memory (Flash), and a rich set of digital and analog peripherals. The Cortex-M0+ is the most energy-efficient ARM core, designed for deterministic embedded workloads. Within the broader hierarchy, the ATSAMD20J16A-MU is a microcontroller -> 32-bit MCU -> ARM Cortex-M0+ MCU -> SAM D20 family -> low-power family -> semiconductor IC.
Key features include the Cortex-M0+ core reaching 2.14 CoreMark/MHz, 64 KB Flash plus 8 KB SRAM, an integrated SERCOM (Serial Communication Interface) block that can be configured as UART/SPI/I2C, a 12-bit ADC, 10-bit DAC, and full-speed USB 2.0 device support on selected variants. The SAM D20J also embeds the Microchip Sleepwalking peripheral event system and an Event System for low-power autonomous peripherals.
Architecturally, the SAM D20 family pairs the Cortex-M0+ core with a low-leakage process and a flexible clock tree (internal 48 MHz DFLL, 32.768 kHz oscillator, PLL options). The peripheral event system allows DMA-style data movement without CPU intervention, enabling sleep-mode current consumption in the microamp range while still sampling sensors and toggling I/O.
Typical applications include home automation nodes, low-power wireless sensor hubs, consumer human-interface devices (HID), industrial metering, smart LED controllers, and small graphical HMI panels. The wide 1.62-3.6 V supply range supports direct operation from a single Li-ion cell or two AA batteries.
Design consideration: when migrating code from ATSAM to other Cortex-M0+ MCUs, verify pin mapping and SERCOM channel allocation - SERCOM instances are multiplexed and must be remapped through the PORT MUX registers. Always consult the device-specific datasheet for pad configuration.
This page synthesizes real-time distributor pricing, pin-compatible drop-in alternatives from the same SAM D20J family, and practical low-power design notes beyond what is collected on DigiKey, Mouser, or Octopart.
חלופות תחליף ישיר עבור ATSAMD20J16A-MU — 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 ATSAMD20J16A-MU (אותו גורם צורה וטביעת רגל) — שונים ב Package, Operating Temperature, Program Memory (Flash), SRAM, RoHS Status.
ATSAMD20J18A-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD20J15A-MU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAMD20J14B-MU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD21J18A-MU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAMC20J18A-MUT
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATSAMD11D14A-MUT
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ATSAMD20J16A-MU דירוגים מרביים ומאפיינים חשמליים
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark Performance | 2.14 CoreMark/MHz |
| Program Flash | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (Vdd) | 1.62 V to 3.6 V |
| מארז | 64-QFN (9x9 mm) with Exposed Pad |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit, 1 MSPS |
| Communication Interfaces | SERCOM (UART/SPI/I2C) x6, I2S, USB 2.0 FS Device |
| Timers | TC (16-bit) x3, TCC (24-bit) x1, RTC x1 |
| Touch Support | QTouch/PTC peripheral |
| סטטוס RoHS | Compliant |
| רמת MSL | 3 (168 hours) |
| סוג הרכבה | Surface Mount |
| Series | SAM D20J |
תצורת פינים של ATSAMD20J16A-MU
| פין 1 | PA00 — Port A GPIO 0 (XIN) |
| פין 2 | PA01 — Port A GPIO 1 (XOUT) |
| פין 3 | PA02 — Port A GPIO 2 (ADC AIN0) |
| פין 4 | PA03 — Port A GPIO 3 (ADC AIN1, VREFA) |
| פין 5 | PA04 — Port A GPIO 4 (ADC AIN2, VREFB) |
| פין 6 | PA05 — Port A GPIO 5 (ADC AIN3) |
| פין 7 | PA06 — Port A GPIO 6 (ADC AIN4) |
| פין 8 | PA07 — Port A GPIO 7 (ADC AIN5) |
| פין 9 | PA08 — Port A GPIO 8 (ADC AIN6) |
| פין 10 | PA09 — Port A GPIO 9 (ADC AIN7) |
| פין 11 | PA10 — Port A GPIO 10 (ADC AIN8) |
| פין 12 | PA11 — Port A GPIO 11 (ADC AIN9) |
| פין 13 | VDDIO — I/O supply voltage |
| פין 14 | GND — Ground |
| פין 15 | PA12 — Port A GPIO 12 |
| פין 16 | PA13 — Port A GPIO 13 |
| פין 17 | PA14 — Port A GPIO 14 |
| פין 18 | PA15 — Port A GPIO 15 |
| פין 19 | PA16 — Port A GPIO 16 |
| פין 20 | PA17 — Port A GPIO 17 |
| פין 21 | PA18 — Port A GPIO 18 |
| פין 22 | PA19 — Port A GPIO 19 |
| פין 23 | PA20 — Port A GPIO 20 |
| פין 24 | PA21 — Port A GPIO 21 |
| פין 25 | PA22 — Port A GPIO 22 |
| פין 26 | PA23 — Port A GPIO 23 |
| פין 27 | PA24 — Port A GPIO 24 (USB D-) |
| פין 28 | PA25 — Port A GPIO 25 (USB D+) |
| פין 29 | GND — Ground |
| פין 30 | VDDIO — I/O supply voltage |
| פין 31 | PA26 — Port A GPIO 26 |
| פין 32 | PA27 — Port A GPIO 27 |
| פין 33 | PA28 — Port A GPIO 28 |
| פין 34 | PA29 — Port A GPIO 29 |
| פין 35 | PA30 — Port A GPIO 30 (SWCLK) |
| פין 36 | PA31 — Port A GPIO 31 (SWDIO) |
| פין 37 | PB00 — Port B GPIO 0 |
| פין 38 | PB01 — Port B GPIO 1 |
| פין 39 | PB02 — Port B GPIO 2 (ADC AIN10) |
| פין 40 | PB03 — Port B GPIO 3 (ADC AIN11) |
| פין 41 | PB04 — Port B GPIO 4 (ADC AIN12) |
| פין 42 | PB05 — Port B GPIO 5 (ADC AIN13) |
| פין 43 | PB06 — Port B GPIO 6 (ADC AIN14) |
| פין 44 | PB07 — Port B GPIO 7 (ADC AIN15) |
| פין 45 | PB08 — Port B GPIO 8 (ADC AIN16) |
| פין 46 | PB09 — Port B GPIO 9 (ADC AIN17) |
| פין 47 | PB10 — Port B GPIO 10 |
| פין 48 | PB11 — Port B GPIO 11 |
| פין 49 | PB12 — Port B GPIO 12 |
| פין 50 | PB13 — Port B GPIO 13 |
| פין 51 | PB14 — Port B GPIO 14 |
| פין 52 | PB15 — Port B GPIO 15 |
| פין 53 | PB16 — Port B GPIO 16 |
| פין 54 | PB17 — Port B GPIO 17 |
| פין 55 | PB18 — Port B GPIO 18 |
| פין 56 | PB19 — Port B GPIO 19 |
| פין 57 | PB20 — Port B GPIO 20 |
| פין 58 | PB21 — Port B GPIO 21 |
| פין 59 | GND — Ground |
| פין 60 | VDDIN — Voltage regulator input |
| פין 61 | VDDCORE — Internal core voltage output (decouple) |
| פין 62 | VDDIO — I/O supply voltage |
| פין 63 | RESETn — Reset input (active low) |
| פין 64 | GND — Ground (Exposed Pad) |
יישומים טיפוסיים
ATSAMD20J16A-MU מתאים עבור 7 יישוםs: Home Automation Sensor Hubs, Industrial Metering & Data Loggers, Consumer HID Devices, Low-Power Wireless Sensor Nodes, Smart LED Lighting Controllers, Battery-Powered Wearable Fitness Bands, Automotive Body Electronics.
Home Automation Sensor Hubs
The ATSAMD20J16A-MU fits home automation sensor hubs because its Cortex-M0+ core at 48 MHz runs Zigbee or Thread host stack fragments, while six SERCOM channels multiplex UART/SPI/I2C for multi-sensor I/O. The 64 KB Flash accommodates an OTA bootloader plus application firmware. Wide 1.62-3.6 V supply allows direct connection to 2xAA cells or a single Li-ion. Sleepwalking peripherals sample temperature/humidity sensors autonomously, drawing microamps while the CPU sleeps, yielding multi-year battery life.
מומלץ
Industrial Metering & Data Loggers
In industrial metering, the ATSAMD20J16A-MU's 12-bit ADC (350 ksps) accurately samples analog signals from current transformers, flow meters, or strain gauges. The Event System allows timestamped ADC captures via TC triggers without CPU intervention, freeing the Cortex-M0+ for power-metering math. The 64-pin QFN package exposes enough GPIO for keypad inputs and segmented LCD driving via the integrated peripheral touch controller. Industrial -40C to +85C temperature grade handles harsh factory environments.
מומלץ
Consumer HID Devices
USB Human Interface Devices (keyboards, mice, game controllers) benefit from the ATSAMD20J16A-MU's full-speed USB 2.0 device peripheral and 48 MHz Cortex-M0+ that runs USB stacks without taxing CPU bandwidth. Six SERCOM channels handle auxiliary SPI/I2C peripherals such as RGB lighting or external sensors. With 8 KB SRAM, HID class descriptors and report buffers fit comfortably. The 64-QFN's small 9x9 mm footprint fits compact consumer enclosures.
מומלץ
Low-Power Wireless Sensor Nodes
Wireless sensor nodes paired with sub-GHz or 2.4 GHz transceivers leverage the ATSAMD20J16A-MU's sub-microamp sleep current and Sleepwalking peripherals. The MCU sleeps while the radio interrupts only on relevant packets, drawing minimal quiescent current. With 64 KB Flash, room exists for sensor drivers, link-layer security, and OTA firmware updates. The Cortex-M0+ executes AES-128 encryption blocks within tight timing budgets for encrypted transmissions.
מומלץ
Smart LED Lighting Controllers
The ATSAMD20J16A-MU drives smart LED lighting by combining PWM channels (TCC 24-bit + TC 16-bit timers) for high-resolution dimming and SERCOM channels for SPI-driven LED driver ICs. The Cortex-M0+ executes DMX, DALI, or proprietary lighting protocols in real time. 8 KB SRAM buffers color-mixing calculations, while 64 KB Flash holds firmware for multiple lighting modes. The 1.62-3.6 V supply matches directly-driven LED strips.
מומלץ
Battery-Powered Wearable Fitness Bands
Wearable fitness bands exploit the ATSAMD20J16A-MU's low-power architecture, with the Cortex-M0+ sleeping between accelerometer samples while the Event System captures motion events autonomously. The 12-bit ADC digitizes bio-sensor signals (heart-rate, SpO2), and SERCOM interfaces the IMU over I2C/SPI. The 64-QFN 9x9 mm footprint fits thin wearable enclosures, and the 1.62 V minimum supply extends usable battery life to nearly the full Li-ion discharge curve.
מומלץ
Automotive Body Electronics
Although the ATSAMD20J16A-MU is industrial-grade (-40C to +85C), it is widely used in non-safety automotive body electronics such as interior lighting controllers, seat-position memories, and HVAC blend-door actuators. The 64-pin QFN provides enough GPIO for multiple motor-driver or relay controls. For AEC-Q100-qualified applications, the SAMC20 automotive family (e.g., ATSAMC20J18A-AUT) provides pin-compatible drop-in upgrades in the same footprint. SERCOM channels handle LIN or CAN bus transceivers.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATSAMD20J16A-MU — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ATSAMD20J18A-MU | ATSAMD20J15A-MU | ATSAMD20J14B-MU | ATSAMD21J18A-MU | ATSAMC20J18A-MUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Flash | 64 KB | 256 KB | 32 KB | 16 KB | 256 KB | 256 KB |
| SRAM | 8 KB | 32 KB | 4 KB | 2 KB | 32 KB | 32 KB |
| CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz | 48 MHz |
| FPU | No | No | No | No | Yes | No |
| AEC-Q100 | Not qualified | Not qualified | Not qualified | Not qualified | Not qualified | Qualified |
| USB | FS Device | FS Device | FS Device | FS Device | FS Host + Device | FS Device |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Industrial | Industrial | Automotive Grade 1 |
מבדילים עיקריים
- Balanced memory density with abundant Flash for typical IoT workloads (לעומתATSAMD20J14B-MU)
- Lower cost than SAM D21 while sharing the same pinout (לעומתATSAMD21J18A-MU)
- Higher pin count and more peripherals than SAM D20E variants (לעומתATSAMD20E16A-MU)
- Industrial-grade vs AEC-Q100 of SAMC20 (לעומתATSAMC20J18A-MUT)
הערות תכנון
Estimated: at 48 MHz active current is ~7 mA typical; in deep-sleep with full SRAM retention, current drops below 5 uA. For battery-powered designs, use the integrated DFLL closed-loop mode with the 32.768 kHz crystal as reference to maintain accurate timing while the CPU sleeps. The on-chip voltage regulator requires a 1 uF X7R decoupling capacitor on VDDCORE (pin 11).
The 64-QFN (9x9 mm) package features an exposed thermal pad that MUST be soldered to a ground copper pour with thermal vias to meet specified electrical and thermal performance. Without proper thermal pad soldering, the die junction temperature can rise 20-30 C above ambient at full 48 MHz load, risking long-term reliability. Recommended copper pour area: at least 100 mm^2 of 1 oz copper with 9-12 thermal vias.
Route the SERCOM differential pairs (USB DP/DN on PA24/PA25) with 90 ohm differential impedance and length matching within 2 mm. Place the 32.768 kHz crystal traces symmetrically and within 5 mm of XIN/XOUT pins (PA00/PA01). Avoid routing digital signals under the QFN thermal pad region to prevent noise coupling into the analog ADC reference.
Do not leave the NRESET pin floating - it requires a 10 kohm pull-up to VDDIO or a manual reset supervisor. SERCOM channel-to-pin mapping is configured via the PORT PMUX[].PMUXE/PMUXO registers; misconfiguration is the most common reason for UART/SPI/I2C not working on first prototype. Always initialize the GCLK (Generic Clock Controller) before enabling SERCOM peripherals.
For ADC sampling above 100 ksps, add an external buffer (e.g., MCP6002 op-amp) between the analog source and the ADC input pin to handle the S&H capacitor charging transients. The ADC reference voltage (VREFA on pin 4) should be decoupled with a 100 nF ceramic + 10 uF tantalum capacitor combination for low-noise high-resolution conversions.
מידע על תאימות
Industrial temperature grade -40C to +85C. RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose ATSAMC20 family for automotive.
