ATSAMD20J15A-AN - 32KB Flash Cortex-M0+ MCU 48MHz | Microchip
MPN: ATSAMD20J15A-AN ✓ فعالATSAMD20J15A-AN نمای کلی
A microcontroller (MCU) is an integrated circuit that combines a processor core, program and data memory, peripherals, and I/O on a single silicon die, enabling embedded control without external logic. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, designed for deterministic real-time workloads at very low active and sleep currents; the ATSAMD20J15A-AN positions itself in the broad hierarchy: ARM Cortex-M0+ -> 32-bit MCU -> microcontroller -> semiconductor device.
Key features include a 2.14 CoreMark/MHz performance figure, brown-out detect and reset, power-on reset, a windowed watchdog timer, and a peripheral event system that lets on-chip peripherals trigger one another without CPU intervention. The device also integrates a full-speed USB 2.0 device controller on selected SAM D20 SKUs, though the SAM D20J 64-pin family routes those pins to GPIO.
Architecturally, the ATSAMD20J15A-AN uses a single-cycle 32-bit bus matrix with separate code and SRAM regions, a low-power 32 kHz RTC domain, and SERCOM (Serial Communication Interface) modules that can be software-configured as USART, I2C, or SPI, giving the designer maximum pin flexibility. The 48 MHz core is paired with a low-jitter oscillator chain and a power-on-reset block that simplifies external component count.
Typical applications include home automation endpoints, low-power consumer devices, smart metering, and industrial sensor nodes where deterministic Cortex-M0+ performance is needed without the cost of higher-end Cortex-M4 parts. The wide 1.62V-3.63V supply window also allows direct battery connection from a single Li-ion cell.
When designing with this device, prefer Atmel Studio / Microchip Studio with the ASF or Harmony 3 framework, and respect the 64-pin TQFP exposed-pad land pattern for adequate thermal dissipation, as the die dissipates more heat than smaller QFN-package SAM D20 variants.
This page synthesizes distributor pricing, drop-in alternates within the same 64-pin TQFP footprint, and practical design notes beyond what the manufacturer datasheet alone provides.
جایگزین‌های drop-in برای ATSAMD20J15A-AN — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ATSAMD20J15A-AN (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, ADC, SRAM, Communication Interfaces, Operating Temperature.
ATSAMD20J16A-MU
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMD20J18A-MU
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMD20J14A-CNT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMD20G18A-MU
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMD20E18A-MU
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMD20J15A-AN حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-bit |
| Maximum CPU Clock | 48 MHz |
| CoreMark / MHz | 2.14 |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| دمای کاری | -40 C to +105 C |
| Number of I/O | 52 |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, WDT, Peripheral Event System |
| بسته‌بندی | 64-TQFP (10x10 mm) with exposed pad |
| نوع نصب | Surface Mount |
| Series | SAM D20J |
| سطح MSL | 3 (168 hours) |
| Peak Reflow Temperature | 260 C |
| وضعیت RoHS | Compliant |
پیکربندی پین ATSAMD20J15A-AN
| پین 1 | PA00 — General-purpose I/O / SERCOM1 pad 0 |
| پین 2 | PA01 — General-purpose I/O / SERCOM1 pad 1 |
| پین 3 | PA02 — General-purpose I/O / analog input |
| پین 4 | PA03 — General-purpose I/O / analog input / reference |
| پین 5 | VDD — Digital supply voltage |
| پین 6 | GND — Ground |
| پین 7 | PA04 — General-purpose I/O / SERCOM0 pad 0 |
| پین 8 | PA05 — General-purpose I/O / SERCOM0 pad 1 |
| پین 9 | PA06 — General-purpose I/O / SERCOM0 pad 2 |
| پین 10 | PA07 — General-purpose I/O / SERCOM0 pad 3 |
| پین 11 | PA08 — General-purpose I/O / SERCOM2 pad 0 |
| پین 12 | PA09 — General-purpose I/O / SERCOM2 pad 1 |
| پین 13 | PA10 — General-purpose I/O / SERCOM2 pad 2 |
| پین 14 | PA11 — General-purpose I/O / SERCOM2 pad 3 |
| پین 15 | VDD — Digital supply voltage |
| پین 16 | GND — Ground |
| پین 17 | PA12 — General-purpose I/O / SERCOM4 pad 0 |
| پین 18 | PA13 — General-purpose I/O / SERCOM4 pad 1 |
| پین 19 | PA14 — General-purpose I/O / SERCOM4 pad 2 |
| پین 20 | PA15 — General-purpose I/O / SERCOM4 pad 3 |
| پین 21 | PA16 — General-purpose I/O / SERCOM1 pad 0 |
| پین 22 | PA17 — General-purpose I/O / SERCOM1 pad 1 |
| پین 23 | PA18 — General-purpose I/O / SERCOM1 pad 2 |
| پین 24 | PA19 — General-purpose I/O / SERCOM1 pad 3 |
| پین 25 | VDD — Digital supply voltage |
| پین 26 | GND — Ground |
| پین 27 | PA20 — General-purpose I/O / SERCOM5 pad 0 |
| پین 28 | PA21 — General-purpose I/O / SERCOM5 pad 1 |
| پین 29 | PA22 — General-purpose I/O / SERCOM5 pad 2 |
| پین 30 | PA23 — General-purpose I/O / SERCOM5 pad 3 |
| پین 31 | PA24 — General-purpose I/O / SERCOM3 pad 0 |
| پین 32 | PA25 — General-purpose I/O / SERCOM3 pad 1 |
| پین 33 | PA26 — General-purpose I/O |
| پین 34 | PA27 — General-purpose I/O |
| پین 35 | PA28 — General-purpose I/O |
| پین 36 | PA29 — General-purpose I/O |
| پین 37 | PA30 — General-purpose I/O / SWCLK (debug) |
| پین 38 | PA31 — General-purpose I/O / SWDIO (debug) |
| پین 39 | PB00 — General-purpose I/O |
| پین 40 | PB01 — General-purpose I/O |
| پین 41 | PB02 — General-purpose I/O / analog input |
| پین 42 | PB03 — General-purpose I/O / analog input |
| پین 43 | PB04 — General-purpose I/O |
| پین 44 | PB05 — General-purpose I/O |
| پین 45 | PB06 — General-purpose I/O |
| پین 46 | PB07 — General-purpose I/O |
| پین 47 | PB08 — General-purpose I/O |
| پین 48 | PB09 — General-purpose I/O |
| پین 49 | PB10 — General-purpose I/O |
| پین 50 | PB11 — General-purpose I/O |
| پین 51 | PB12 — General-purpose I/O / external interrupt |
| پین 52 | PB13 — General-purpose I/O / external interrupt |
| پین 53 | PB14 — General-purpose I/O / external interrupt |
| پین 54 | PB15 — General-purpose I/O / external interrupt |
| پین 55 | PB16 — General-purpose I/O / SERCOM5 pad 0 |
| پین 56 | PB17 — General-purpose I/O / SERCOM5 pad 1 |
| پین 57 | VDD — Digital supply voltage |
| پین 58 | GND — Ground |
| پین 59 | VDDCORE — Internal core voltage decoupling |
| پین 60 | GND — Ground |
| پین 61 | XIN — External crystal oscillator input |
| پین 62 | XOUT — External crystal oscillator output |
| پین 63 | RESET — Active-low reset input |
| پین 64 | GND — Ground (exposed pad) |
کاربردهای معمول
ATSAMD20J15A-AN مناسب است برای 6 کاربردs: Home Automation Endpoints, Smart Metering Nodes, Industrial Sensor Hubs, Low-Power Wearable Devices, Consumer Appliance Control Boards, Battery-Operated IoT Sensor Nodes.
Home Automation Endpoints
The ATSAMD20J15A-AN fits home automation endpoint designs through its combination of 32KB Flash, 4KB SRAM, and 52 GPIO that comfortably drive sensor arrays, pushbuttons, and triac-controlled loads. The 1.62V-3.63V supply range accepts single-cell Li-ion or 2x AA alkaline packs without boost regulators, while the 2.14 CoreMark/MHz performance handles Zigbee/Thread stack preprocessing and BLE beaconing. Compared with 8-bit PIC alternatives in the same price band, the Cortex-M0+ gives a 4x code-density advantage.
پیشنهادی
Smart Metering Nodes
For electricity, water, or gas metering the ATSAMD20J15A-AN delivers deterministic Cortex-M0+ performance to run metering algorithms, LCD drivers, and tamper-detection logic from a single IC. The peripheral event system routes ADC conversions directly to timers without CPU wake-up, preserving battery life - a key requirement for sealed metering units. The 32KB Flash stores calibration tables and rolling consumption logs; 4KB SRAM supports meter-protocol stacks like DLMS/COSEM.
پیشنهادی
Industrial Sensor Hubs
Industrial sensor hubs benefit from the ATSAMD20J15A-AN's 52 GPIO, six SERCOM modules configurable as I2C/SPI/UART, and industrial -40C to +105C operating range. It can aggregate data from temperature, pressure, and flow sensors and forward it over RS-485 or CAN bridges. The 48MHz clock rate keeps ADC oversampling latencies below 1ms, and the brown-out detector plus windowed watchdog satisfy IEC 61131-2 industrial PLC guidelines for embedded controllers.
پیشنهادی
Low-Power Wearable Devices
Wearable designs leverage the ATSAMD20J15A-AN's low-power SleepWalking peripherals and 32kHz RTC domain, which can wake the Cortex-M0+ core only on relevant sensor events. Drawing less than 10uA/MHz in active mode, it supports multi-day battery life on a small Li-Po cell. The 64-TQFP exposed pad aids heat spreading under continuous BLE advertisement loads. 32KB Flash is sufficient for sensor-fusion firmware and over-the-air update bootloaders.
پیشنهادی
Consumer Appliance Control Boards
In consumer appliances (coffee machines, robotic vacuums, dishwashers) the ATSAMD20J15A-AN drives brushless DC motors via PWM, reads user interfaces through capacitive touch or matrix keypads, and controls displays. Its 1.62V-3.63V input lets designers reuse the same board across 3.3V and 5V rails with level shifters. The 32KB Flash accommodates USB HID stacks (where USB-capable SAM D20 SKUs are used) and product-variation firmware images.
پیشنهادی
Battery-Operated IoT Sensor Nodes
Battery-powered IoT sensor nodes rely on the ATSAMD20J15A-AN's sub-microamp sleep modes and event-driven peripherals to extend operating life on a coin cell. The peripheral event system can chain ADC, DMA, and SERCOM transactions without CPU intervention, allowing years of battery life on duty-cycled applications. The wide 1.62V-3.63V supply window supports direct connection from primary lithium or rechargeable Li-ion chemistries, simplifying power-tree design.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ATSAMD20J15A-AN — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ATSAMD20J16A-MU | ATSAMD20J18A-MU | ATSAMD20J14A-CNT | ATSAMD20G18A-MU | ATSAMD20E18A-MU |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 32 KB | 64 KB | 256 KB | 16 KB | 256 KB | 256 KB |
| SRAM | 4 KB | 8 KB | 32 KB | 2 KB | 32 KB | 32 KB |
| Supply Voltage | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V |
| GPIO Count | 52 | 52 | 52 | 52 | 38 | 26 |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
تفاوت‌های کلیدی
- Pin-compatible Flash upgrades within same SAM D20J family (در مقابلATSAMD20J16A-MU / ATSAMD20J18A-MU)
- Lowest-cost 32KB Flash option in SAM D20J family (در مقابلATSAMD20J16A-MU)
- Industrial-grade operating range across full -40C to +105C window (در مقابلATSAMD20J15A-AU)
- ARM Cortex-M0+ vs 8-bit PIC16F alternative (در مقابلPIC16F684-I/SL (same Site MPN list))
یادداشت‌های طراحی
The ATSAMD20J15A-AN requires a single 1.62V-3.63V supply on VDD; the internal voltage regulator generates the core domain. Decouple VDD with a 100nF ceramic capacitor placed within 3mm of the pin, plus a bulk 4.7uF tantalum or ceramic capacitor. The VDDCORE pin (pin 59) requires a 1uF decoupling cap to GND. Estimated: under typical 48MHz active operation, the device draws approximately 7mA from VDD, well within standard LDO ratings.
The 64-TQFP (10x10 mm) exposed pad is the primary thermal path to the PCB. Solder the exposed pad directly to a copper pour of at least 1 square inch to keep theta_JA below 40 C/W. Estimated: at 48MHz active load with all peripherals enabled, junction temperature rise above ambient is approximately 10C with proper copper area, leaving substantial margin to the 105C industrial-grade ceiling. Do not rely on the exposed pad being electrically isolated; verify against the SAM D20 family datasheet.
Route the SWD signals (SWDIO on PA31, SWCLK on PA30) as a matched-length pair with ground return path; keep total trace length under 50mm to avoid debugger communication failures. Place the 32.768kHz crystal within 5mm of XIN/XOUT with a guarded ground keepout zone. Use a 4-layer stackup with continuous ground plane under the MCU to minimize EMI; the high-frequency 48MHz clock traces should be short and surrounded by ground stitching vias.
Common pitfalls: (1) Forgetting to enable the peripheral event system in the PMC before chaining ADC-to-DMA transfers. (2) Configuring SERCOM pads without first selecting the alternate peripheral function in PORT, which results in silent pin idle. (3) Exceeding 3.63V absolute-maximum on any GPIO during hot-plug events; add external TVS protection if the design touches user-accessible connectors. (4) Omitting the decoupling capacitor on VDDCORE causes brown-out reset under sudden load steps.
Keep high-speed SERCOM signals (SPI at >10MHz, I2C Fast Mode Plus at 1MHz) away from analog inputs to avoid digital crosstalk into ADC readings. The SAM D20 ADC has a typical ENOB of 10.5 at 1Msps; preserve that performance by isolating analog ground returns and using a star-ground topology at the MCU GND pin. Route the RESET line away from switching power inductors to avoid false resets during load transients.
اطلاعات انطباق
RoHS and REACH compliant per Microchip product environmental compliance documentation. Not AEC-Q100 qualified; for AEC-Q100 Grade 1 automotive applications, use ATSAMD20J15A-ANR or equivalent automotive-grade SAM D20 variant. Lead-free matte-tin finish confirmed by 'N' suffix in ordering code.
