ATSAMC20J18A-AUT - 256KB Flash Cortex-M0+ MCU | Microchip
MPN: ATSAMC20J18A-AUT ✓ فعالATSAMC20J18A-AUT نمای کلی
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash for code, SRAM for data), peripherals, and I/O onto one silicon die. The ARM Cortex-M0+ is the most energy-efficient core in the Cortex-M family, designed for deterministic embedded control with Thumb-2 instruction set, hardware single-cycle multiply, and a Nested Vectored Interrupt Controller (NVIC). The SAM C20 family extends this core with 5V tolerance, CAN-FD support, and Microchip's Peripheral Touch Controller (PTC), making the part a natural fit for industrial automation, appliance control, and automotive body electronics where 5V rails still dominate.
Key features include the Cortex-M0+ core at 48 MHz delivering 38 CoreMark, integrated CAN-FD controller, full-speed USB device, up to six SERCOM serial interfaces, a 12-bit 1 Msps ADC, a 16-bit Sigma-Delta ADC support path, two analog comparators, and a 24-channel PTC for capacitive touch sensing. The 256 KB Flash supports in-application programming via the bootloader ROM, and 32 KB SRAM is sufficient for protocol stacks such as CANopen or Modbus alongside application logic. The device also includes a 32-bit real-time clock, multiple timer/counters (TCC), and a Parallel Capture Controller for signal measurement.
The architecture pairs the Cortex-M0+ core with Microchip's peripheral bus matrix that gives DMA access to every major peripheral, offloading data movement from the CPU. Hardware dividers run at full clock speed, and the 2.7V to 5.5V range is regulated internally to the 1.2V core domain, simplifying external power design to a single bulk rail. The 64-pin TQFP (10x10 mm) package provides 52 GPIO with 5V tolerance, suitable for moderate I/O count systems with mixed analog/digital signal exposure.
Typical applications include industrial sensor transmitters, appliance control boards, CAN node endpoints (especially with CAN-FD upgrade path), USB device peripherals, low-power IoT edge nodes, and motor control complements to a dedicated motor MCU. The AEC-Q100 qualified versions of the family are used in automotive body and chassis modules where 5V tolerance is mandatory.
When designing with this device, allocate 4 KB of Flash for the Atmel/Microchip SAM-BA bootloader if USB firmware updates are needed, and provision a 32.768 kHz crystal on the XIN32/XOUT32 pins for accurate RTC timekeeping. The device's 5V tolerance is a real differentiator versus 3.3V-only Cortex-M0+ parts from competing families.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM C20 family, and practical design notes not found in the manufacturer datasheet, optimized for engineers evaluating the ATSAMC20J18A-AUT for a 5V industrial design.
جایگزین‌های drop-in برای ATSAMC20J18A-AUT — 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 ATSAMC20J18A-AUT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, ADC, Core Architecture, Operating Temperature, RoHS Status.
ATSAMC20J17A-AUT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMC20J16A-AUT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMC20J16A-MUT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMC20E18A-AUT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATSAMC20J18A-AUT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | ARM Cortex-M0+ (32-bit, single-core) |
| Maximum Clock Speed | 48 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Tolerance | 5 V tolerant |
| GPIO Count | 52 (on 64-pin TQFP) |
| ADC | 12-bit, up to 1 Msps |
| Analog Comparators | 2 |
| PTC (Touch Channels) | Up to 24 |
| CAN | CAN-FD controller |
| USB | Full-Speed USB Device |
| SERCOM | Up to 6 configurable serial interfaces |
| بسته‌بندی | 64-pin TQFP (10x10 mm) |
| Operating Temperature (Industrial) | -40 C to +85 C |
| Operating Temperature (Automotive) | -40 C to +125 C (AEC-Q100 grades available in family) |
| نوع نصب | Surface Mount |
| سطح MSL | 3 |
| وضعیت RoHS | Compliant (Green) |
پیکربندی پین ATSAMC20J18A-AUT
| پین 1 | PA00 — GPIO / XIN32 (32.768 kHz crystal input) |
| پین 2 | PA01 — GPIO / XOUT32 (32.768 kHz crystal output) |
| پین 3 | VDDIO — I/O supply voltage |
| پین 4 | GND — Ground |
| پین 5 | PA02 — GPIO / AIN0 (ADC input) |
| پین 6 | PA03 — GPIO / AIN1 (ADC input) |
| پین 7 | VDDIO — I/O supply voltage |
| پین 8 | GND — Ground |
| پین 9 | PA04 — GPIO / AIN2 / VREFA |
| پین 10 | PA05 — GPIO / AIN3 |
| پین 11 | PA06 — GPIO / AIN4 / ACMP0 IN+ |
| پین 12 | PA07 — GPIO / AIN5 / ACMP0 IN- |
| پین 13 | VDDIO — I/O supply voltage |
| پین 14 | GND — Ground |
| پین 15 | PA08 — GPIO / AIN6 / SERCOM0 PAD0 |
| پین 16 | PA09 — GPIO / AIN7 / SERCOM0 PAD1 |
| پین 17 | PA10 — GPIO / AIN8 / SERCOM0 PAD2 |
| پین 18 | PA11 — GPIO / AIN9 / SERCOM0 PAD3 |
| پین 19 | PA12 — GPIO / CAN RX |
| پین 20 | PA13 — GPIO / CAN TX |
| پین 21 | PA14 — GPIO / XIN (main crystal input) |
| پین 22 | PA15 — GPIO / XOUT (main crystal output) |
| پین 23 | PA16 — GPIO / SERCOM1 PAD0 |
| پین 24 | PA17 — GPIO / SERCOM1 PAD1 |
| پین 25 | PA18 — GPIO / SERCOM1 PAD2 |
| پین 26 | PA19 — GPIO / SERCOM1 PAD3 |
| پین 27 | PA20 — GPIO / SERCOM3 PAD0 |
| پین 28 | PA21 — GPIO / SERCOM3 PAD1 |
| پین 29 | PA22 — GPIO / SERCOM3 PAD2 |
| پین 30 | PA23 — GPIO / SERCOM3 PAD3 |
| پین 31 | VDDIO — I/O supply voltage |
| پین 32 | GND — Ground |
| پین 33 | PA24 — GPIO / USB DP |
| پین 34 | PA25 — GPIO / USB DM |
| پین 35 | PA26 — GPIO |
| پین 36 | PA27 — GPIO |
| پین 37 | PA28 — GPIO |
| پین 38 | PA29 — GPIO |
| پین 39 | PA30 — GPIO / SWCLK (debug clock) |
| پین 40 | PA31 — GPIO / SWDIO (debug data) |
| پین 41 | PB00 — GPIO |
| پین 42 | PB01 — GPIO |
| پین 43 | PB02 — GPIO / SERCOM5 PAD0 |
| پین 44 | PB03 — GPIO / SERCOM5 PAD1 |
| پین 45 | PB04 — GPIO / SERCOM5 PAD2 |
| پین 46 | PB05 — GPIO / SERCOM5 PAD3 |
| پین 47 | PB06 — GPIO |
| پین 48 | PB07 — GPIO |
| پین 49 | PB08 — GPIO |
| پین 50 | PB09 — GPIO |
| پین 51 | PB10 — GPIO |
| پین 52 | PB11 — GPIO |
| پین 53 | PB12 — GPIO / PTC Y-line |
| پین 54 | PB13 — GPIO / PTC X-line |
| پین 55 | PB14 — GPIO / PTC X-line |
| پین 56 | PB15 — GPIO / PTC Y-line |
| پین 57 | PB16 — GPIO / PTC X-line |
| پین 58 | PB17 — GPIO / PTC Y-line |
| پین 59 | VDDIO — I/O supply voltage |
| پین 60 | GND — Ground |
| پین 61 | VDDCORE — Internal core voltage (decoupling) |
| پین 62 | VDDIN — Main voltage regulator input |
| پین 63 | NRST — Reset input (active low) |
| پین 64 | GND — Ground |
کاربردهای معمول
ATSAMC20J18A-AUT مناسب است برای 6 کاربردs: Industrial Sensor Transmitter, Appliance Control Board, CAN-FD Automotive Body Module, USB Device Peripheral, Capacitive Touch User Interface, Battery-Powered IoT Edge Node.
Industrial Sensor Transmitter
The ATSAMC20J18A-AUT's 5V-tolerant GPIO and CAN-FD controller make it well-suited for industrial 4-20 mA loop-powered sensor transmitters and CAN nodes. The 12-bit 1 Msps ADC digitizes bridge sensors directly without external amplifier chains, while 32 KB SRAM holds CANopen or Modbus RTU protocol buffers alongside calibration coefficients. Operated from a single 5V rail with no level-shifters required, the device reduces BOM complexity and PCB area. The 48 MHz Cortex-M0+ core runs one-step digital filtering, linearization, and HART-style burst modulation within tight loop-update deadlines under 10 ms.
پیشنهادی
Appliance Control Board
The ATSAMC20J18A-AUT is an ideal main controller for washing machines, dishwashers, and HVAC appliances where 5V triac drivers and 5V display interfaces dominate the BOM. With up to 52 GPIO in the 64-pin TQFP, the MCU can directly drive relay coils, encoder wheels, and 7-segment LED displays without external logic. The 24-channel Peripheral Touch Controller (PTC) supports capacitive user interfaces for waterproof button panels. 256 KB Flash fits motor-control state machines plus safety watchdog logic, and the Cortex-M0+ deterministic interrupt latency ensures reliable control-loop timing on a 5V industrial rail.
پیشنهادی
CAN-FD Automotive Body Module
The ATSAMC20J18A-AUT's CAN-FD controller and 5V I/O tolerance match the requirements of automotive body controllers including body control modules, door modules, and seat controllers that still use 5V sensors. The 256 KB Flash hosts CAN stack, diagnostics (UDS), and signal-processing firmware; the 32 KB SRAM keeps CAN-FD message buffers without external RAM. The Cortex-M0+ at 48 MHz executes 38 CoreMark, sufficient for body-control message routing. For AEC-Q100 applications, the same die is available in the family under different temperature-grade suffixes, making this an upgrade path for automotive-grade designs.
پیشنهادی
USB Device Peripheral
The ATSAMC20J18A-AUT integrates full-speed USB 2.0 device capability with on-chip PHY, eliminating external transceivers for HID, CDC, or vendor-class USB peripherals. The 256 KB Flash easily accommodates USB stacks plus application firmware, and the 32 KB SRAM holds USB endpoint buffers alongside protocol state machines. Operated at 48 MHz, the Cortex-M0+ core services USB polling, descriptor handling, and interrupt-driven data transfer with deterministic latency. 5V-tolerant GPIO simplifies ruggedized industrial USB dongles and POS-terminal accessories that must survive 5V bus-powered environments without protective level-shifters.
پیشنهادی
Capacitive Touch User Interface
The ATSAMC20J18A-AUT integrates Microchip's 24-channel Peripheral Touch Controller (PTC) for capacitive touch buttons, sliders, and proximity sensors, supporting wake-on-touch functionality to extend battery life in portable appliances. The Cortex-M0+ at 48 MHz handles PTC acquisition, gesture recognition, and backlight control while the touch controller autonomously wakes the MCU from sleep. The 12-bit ADC can simultaneously monitor other analog signals such as battery voltage or temperature. The 256 KB Flash fits touch-gesture libraries plus application firmware, and the 5V-tolerant GPIO drives 5V LED drivers directly.
پیشنهادی
Battery-Powered IoT Edge Node
The ATSAMC20J18A-AUT supports multiple low-power sleep modes with sub-microamp quiescent current when peripheral clocks are gated, making it suitable for battery-powered edge nodes reporting over CAN, UART, or USB. The 32.768 kHz RTC runs from an external crystal and provides real-time wake-up scheduling. The 12-bit ADC samples environmental sensors at low duty cycle while the Cortex-M0+ core sleeps. With 256 KB Flash and 32 KB SRAM, the device fits IoT protocol stacks such as MQTT-SN or LoRaWAN plus sensor-processing algorithms. Industrial temperature grade supports outdoor enclosure operation.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ATSAMC20J18A-AUT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ATSAMC20J17A-AUT | ATSAMC20J16A-AUT | ATSAMC20J16A-MUT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 128 KB (-50%) | 64 KB (-75%) | 64 KB (-75%) |
| SRAM | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) |
| Operating Voltage | 2.7 V to 5.5 V (5V tolerant I/O) | 2.7 V to 5.5 V (5V tolerant) | 2.7 V to 5.5 V (5V tolerant) | 2.7 V to 5.5 V (5V tolerant) |
| CAN-FD | Yes | Yes | Yes | Yes |
تفاوت‌های کلیدی
- Native 5V I/O tolerance (در مقابلATSAMD20J18A-AU)
- Largest Flash in SAM C20 64-pin TQFP family (در مقابلATSAMC20J17A-AUT)
- Integrated CAN-FD controller (در مقابلATSAMC21J18A-ANT)
یادداشت‌های طراحی
Decouple every VDDIO pin with a 100 nF X7R ceramic placed within 2 mm of the pad; add a single 4.7 uF bulk capacitor on VDDIN. The internal LDO regulates the core voltage from VDDIN, so VDDIN should be tied directly to the 5V (or 3.3V) rail. Estimated: at full 48 MHz activity the device draws around 15 mA active; in standby with RTC running it drops below 5 uA, enabling battery-backed designs without an external supervisor.
Keep the 32.768 kHz crystal traces on XIN32/XOUT32 short and symmetric, with a ground guard ring to minimize noise injection into the RTC oscillator. If USB is used, route the DP/DM pair as a 90-ohm differential with length matching under 2 mm and avoid splits in the reference plane. Place the SWD header (SWCLK, SWDIO, NRST, GND) on a debug-friendly board edge for programming access during bring-up.
Do not assume the SERCOM pads default to GPIO - they require explicit pin-mux configuration via the PORT and PMUX registers or your ASF/MPLAB HAL code. The PTC channels share pins with GPIO and SERCOM; selecting touch functionality disables those peripheral pins. Always issue a fresh chip-erase or bootloader-driven update when switching between bank-A and bank-B Flash to avoid a corrupted-image state.
اطلاعات انطباق
RoHS compliant (Green) per Microchip product page. AEC-Q100 qualified versions of the same die are available in the SAM C20 family under different temperature-grade suffixes (e.g., -ANT, -MNT). -AUT is industrial temperature grade (-40C to +85C), not automotive grade.
