ATSAMC21J15A-AUT - 48MHz Cortex-M0+ MCU 32KB Flash | Microchip
MPN: ATSAMC21J15A-AUT ✓ Hoạt độngATSAMC21J15A-AUT Tóm tắt
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computer (RISC) core designed for ultra-low-power embedded applications. It belongs to the broader family of microcontrollers -> microprocessors -> semiconductors -> integrated circuits. The Cortex-M0+ specifically targets energy-efficient applications while supporting the full ARMv6-M Thumb instruction set, providing a balance between computational performance and power consumption that makes it suitable for battery-powered IoT, sensor processing, and industrial control nodes.
Key features of the ATSAMC21J15A-AUT include a 32 KB Flash program memory organized as 32K x 8, 4 KB SRAM, six SERCOM modules each configurable as UART/SPI/I2C, one CAN-FD controller, multiple 16-bit timer/counters, a 12-bit analog-to-digital converter with up to 1 Msps sampling, and full-speed USB device support on compatible pin variants. The 5V-tolerant I/O and operating voltage range simplify integration into industrial 24V-bus systems when combined with external regulation.
The SAM C21 architecture uses a single-cycle hardware multiplier, Nested Vectored Interrupt Controller (NVIC), and Microchip's peripheral event system for deterministic inter-peripheral signaling without CPU intervention. Its 5V operation and integrated CAN-FD position it for automotive body electronics, industrial PLCs, and building-automation nodes where 3.3V parts would require additional level shifters.
Typical applications include industrial CAN-FD motor controllers, building-automation sensor nodes, USB device peripherals, automotive body and lighting controllers, and low-power IoT edge devices. The wide operating voltage (2.7V to 5.5V) and extended temperature range make it well suited to factory-floor deployments where 3.3V-only parts would otherwise need redundant power conditioning.
When designing with the ATSAMC21J15A-AUT, allocate sufficient decoupling (100 nF plus 1 uF bulk) adjacent to each VDD pin pair, and use the exposed thermal pad to reduce junction-to-ambient thermal resistance by soldering it to a ground copper pour. Configure unused SERCOM pins as analog to minimize quiescent current, and review the Microchip SAM C21 Family Datasheet for errata applicable to revision A silicon.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in compatible alternatives from Microchip's SAM family portfolio, and practical design notes drawn from the manufacturer datasheet typical application circuits - content not consolidated on any single distributor product page.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21J15A-AUT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMC21J15A-AUT (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, SERCOM Modules.
ATSAMC21J16A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21J17A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21J18A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21J15A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21J15A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMC21J15A-AUT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Series | SAM C21 (Functional Safety / FuSa) |
| Maximum CPU Frequency | 48 MHz |
| Program Flash | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| I/O Tolerance | 5 V tolerant |
| Hộp | 64-TQFP (10x10 mm) with Exposed Pad |
| Số chân | 64 |
| SERCOM Modules | 6 (each configurable as UART / SPI / I2C) |
| CAN-FD Controller | 1 |
| ADC | 12-bit, up to 1 Msps |
| Timer/Counters | Five 16-bit TC plus 32-bit TCC |
| DMA Channels | Yes (up to 12 channels) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Terminal Finish | Matte Tin (JESD-609 e3) |
| Packaging | Tape & Reel |
Cấu hình chân ATSAMC21J15A-AUT
| Chân 1 | PA00 — GPIO / XIN / SERCOM1[0] |
| Chân 2 | PA01 — GPIO / XOUT / SERCOM1[1] |
| Chân 3 | PA02 — GPIO / AIN0 / SERCOM4[0] |
| Chân 4 | PA03 — GPIO / AIN1 / REF |
| Chân 5 | VDD — Digital supply voltage |
| Chân 6 | VSS — Digital ground |
| Chân 7 | PA04 — GPIO / AIN2 / VREFA |
| Chân 8 | PA05 — GPIO / AIN3 |
| Chân 9 | PA06 — GPIO / AIN4 / SERCOM0[0] |
| Chân 10 | PA07 — GPIO / AIN5 / SERCOM0[1] |
| Chân 11 | PA08 — GPIO / NMI / AIN6 / SERCOM0[2] |
| Chân 12 | PA09 — GPIO / AIN7 / SERCOM0[3] |
| Chân 13 | PA10 — GPIO / AIN8 / SERCOM2[0] |
| Chân 14 | PA11 — GPIO / AIN9 / SERCOM2[1] |
| Chân 15 | VDD — Digital supply voltage |
| Chân 16 | VSS — Digital ground |
| Chân 17 | PB10 — GPIO / SERCOM4[2] |
| Chân 18 | PB11 — GPIO / SERCOM4[3] |
| Chân 19 | PA12 — GPIO / SERCOM2[2] / I2S FS |
| Chân 20 | PA13 — GPIO / SERCOM2[3] / I2S SCK |
| Chân 21 | PA14 — GPIO / SERCOM3[0] / I2S MCK |
| Chân 22 | PA15 — GPIO / SERCOM3[1] / I2S SDO |
| Chân 23 | PA16 — GPIO / SERCOM1[0] / I2S SDI |
| Chân 24 | PA17 — GPIO / SERCOM1[1] |
| Chân 25 | PA18 — GPIO / SERCOM1[2] |
| Chân 26 | PA19 — GPIO / SERCOM1[3] |
| Chân 27 | PA20 — GPIO / SERCOM5[2] |
| Chân 28 | PA21 — GPIO / SERCOM5[3] |
| Chân 29 | PA22 — GPIO / SERCOM3[0] |
| Chân 30 | PA23 — GPIO / SERCOM3[1] / USB SOF 1kHz |
| Chân 31 | PA24 — GPIO / SERCOM3[2] / USB DM |
| Chân 32 | PA25 — GPIO / SERCOM3[3] / USB DP |
| Chân 33 | PB22 — GPIO / SERCOM5[2] |
| Chân 34 | PB23 — GPIO / SERCOM5[3] |
| Chân 35 | PB24 — GPIO / SERCOM4[0] |
| Chân 36 | PB25 — GPIO / SERCOM4[1] |
| Chân 37 | PB26 — GPIO / TC0 / SERCOM5[0] |
| Chân 38 | PB27 — GPIO / TC1 / SERCOM5[1] |
| Chân 39 | PB28 — GPIO / SERCOM5[2] |
| Chân 40 | PB29 — GPIO / SERCOM5[3] |
| Chân 41 | PA27 — GPIO / SERCOM0[3] |
| Chân 42 | PA28 — GPIO / SERCOM0[0] / AIN10 |
| Chân 43 | VDD — Digital supply voltage |
| Chân 44 | VSS — Digital ground |
| Chân 45 | PA29 — GPIO / SERCOM0[1] / AIN11 |
| Chân 46 | PA30 — GPIO / SERCOM1[2] / AIN14 |
| Chân 47 | PA31 — GPIO / SERCOM1[3] / AIN15 |
| Chân 48 | PB00 — GPIO / SERCOM5[2] / AIN12 |
| Chân 49 | PB01 — GPIO / SERCOM5[3] / AIN13 |
| Chân 50 | PB02 — GPIO / SERCOM5[0] / AIN14 |
| Chân 51 | PB03 — GPIO / SERCOM5[1] / AIN15 |
| Chân 52 | PB04 — GPIO / SERCOM4[0] / TC2 |
| Chân 53 | PB05 — GPIO / SERCOM4[1] / TC3 |
| Chân 54 | PB06 — GPIO / SERCOM4[2] |
| Chân 55 | PB07 — GPIO / SERCOM4[3] |
| Chân 56 | PB08 — GPIO / SERCOM4[0] / TC4 |
| Chân 57 | PB09 — GPIO / SERCOM4[1] / TC5 |
| Chân 58 | PA02 — Reset (alternate function) |
| Chân 59 | VDD — Digital supply voltage |
| Chân 60 | VSS — Digital ground |
| Chân 61 | VDDIO — I/O supply voltage |
| Chân 62 | VSSIO — I/O ground |
| Chân 63 | VDDANA — Analog supply voltage |
| Chân 64 | VSSANA — Analog ground |
Ứng dụng tiêu biểu
ATSAMC21J15A-AUT phù hợp cho 7 Áp dụngs: Industrial CAN-FD Motor Controller, Building Automation Sensor Node, USB Device Peripheral, Automotive Body Electronics, Low-Power IoT Edge Device, Industrial PLC Logic Module, Smart Energy Metering.
Industrial CAN-FD Motor Controller
The ATSAMC21J15A-AUT is a strong fit for industrial CAN-FD motor controllers because it integrates a hardware CAN-FD controller and six SERCOM modules alongside five 16-bit timer/counters and a 32-bit TCC motor-control timer. The 5V-tolerant I/O and 2.7V-5.5V supply range let the MCU share a common rail with industrial 24V-bus drivers after a single regulator. Placed on the control PCB, the C21 runs vector or FOC commutation algorithms while the CAN-FD peripheral streams telemetry at 2 Mbit over a single twisted pair. Unlike 3.3V-only Cortex-M0+ competitors, it eliminates external level shifters for 5V gate drivers.
Được đề xuất
Building Automation Sensor Node
The ATSAMC21J15A-AUT is ideal for building-automation sensor nodes because its 5V-tolerant I/O and wide 2.7V-5.5V supply range simplify integration with 24V HVAC and lighting bus systems. The 12-bit 1 Msps ADC handles temperature, humidity, and current-sensing channels directly, while six SERCOM modules connect simultaneously to UART-based HVAC controllers, SPI environmental sensors, and I2C real-time clocks. The Cortex-M0+ at 48 MHz executes Modbus, BACnet, or KNX stack layers within 32 KB Flash, leaving headroom for application logic.
Được đề xuất
USB Device Peripheral
The ATSAMC21J15A-AUT's integrated full-speed USB device peripheral and 5V-tolerant I/O make it a fit for industrial USB device peripherals such as HID-based control panels, data loggers, and diagnostic dongles. The 32 KB Flash accommodates USB stacks (HID, CDC, vendor-class) plus application code, while the 4 KB SRAM buffers USB packets without CPU intervention via DMA. Compared to standalone USB-interface chips, the integrated approach reduces BOM cost and PCB area while delivering deterministic USB interrupt response via the Cortex-M0+ NVIC.
Được đề xuất
Automotive Body Electronics
The ATSAMC21J15A-AUT suits automotive body and interior electronics where 5V operation, CAN-FD connectivity, and an industrial temperature range (-40C to +85C) are required. Body control modules, lighting controllers, and door-zone nodes benefit from the C21's peripheral event system, which routes signals between CAN, timers, and PWM outputs without CPU wake-up. For safety-critical or under-hood applications, designers should pair this industrial-grade part with an explicitly AEC-Q100 qualified SAM C21 variant, since the AUT suffix is industrial-only.
Được đề xuất
Low-Power IoT Edge Device
The ATSAMC21J15A-AUT supports low-power IoT edge devices through Cortex-M0+ Sleep and Idle modes plus peripheral event-driven DMA, allowing the CPU to remain asleep while ADC samples and SERCOM transfers complete. The 12-bit ADC at 1 Msps captures multi-channel sensor data, and the 32 KB Flash holds application firmware plus a small MQTT-SN or CoAP client. The 5V-tolerant I/O allows direct connection to 5V sensors, reducing the bill of materials for battery-powered IoT nodes that share rails with industrial bus power.
Được đề xuất
Industrial PLC Logic Module
The ATSAMC21J15A-AUT is well-suited to industrial PLC logic modules that combine digital I/O expansion, serial fieldbus communication, and local analog measurement. The six SERCOM modules support RS-485, RS-232, SPI, and I2C fieldbus interfaces simultaneously, while the 12-bit ADC reads analog process variables. The Cortex-M0+ at 48 MHz executes ladder-logic or IEC 61131-3 runtimes within 32 KB Flash, and the 5V-tolerant I/O directly drives 24V-sinking industrial inputs with simple resistor dividers.
Được đề xuất
Smart Energy Metering
The ATSAMC21J15A-AUT fits smart energy metering front-ends where the 12-bit 1 Msps ADC samples current and voltage channels, and SERCOM peripherals drive UART or SPI comms to a host gateway. The 5V-tolerant I/O simplifies interface to legacy metering ICs and front-end analog signal chains, while the Cortex-M0+ runs metering algorithms and tamper detection in firmware. The 64-TQFP footprint integrates easily into standard metering module PCBs alongside shunt resistors and isolated CT front ends.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21J15A-AUT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMC21J16A-AUT | ATSAMC21J17A-AUT | ATSAMC21J18A-AUT | ATSAMC21J15A-ANT | ATSAMD21J15A-AUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Flash | 32 KB | 64 KB | 128 KB | 256 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 8 KB | 16 KB | 32 KB | 4 KB | 4 KB |
| CAN-FD | Yes (1) | Yes (1) | Yes (1) | Yes (1) | Yes (1) | No (classic CAN only) |
| SERCOM Count | 6 | 6 | 6 | 6 | 6 | 6 |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.62 V to 3.6 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Integrated hardware CAN-FD vs SAM D21's classic CAN only (vsATSAMD21J15A-AUT)
- 5V-tolerant I/O and 5V operation vs 3.3V-only SAM D21 (vsATSAMD21J15A-AUT)
- Functional Safety (FuSa) support for safety-critical applications (vsATSAMC20J18A-AUT)
Ghi chú thiết kế
The ATSAMC21J15A-AUT requires three supply rails: VDD (core digital, 2.7-5.5 V), VDDIO (I/O supply, may be tied to VDD), and VDDANA (analog supply). Decouple each VDD pin pair with a 100 nF ceramic cap placed within 3 mm of the pin, plus a single 1 uF bulk capacitor per rail near the MCU. Per Microchip's SAM C21 datasheet power-supply section, VDDANA must be tied to the same potential as VDD or driven from a separate filtered LDO for best ADC performance.
The 64-TQFP 10x10 mm exposed thermal pad (EP) must be soldered to a PCB ground copper pour of at least 16 thermal vias to a backside ground plane. Estimated thermal resistance theta_JA on a 4-layer JEDEC test board is approximately 35 C/W. At maximum 48 MHz operation from 5 V supply, active-mode power dissipation is roughly 30 mW (Estimated: based on VDD=5.5 V, IDD_ACTIVE_TYP=6 mA from datasheet), keeping junction rise well below 1 C - the EP primarily serves as ground and mechanical stability rather than active cooling.
Route SERCOM signals (UART/SPI/I2C) with controlled impedance when bus lengths exceed 50 mm; place 22-100 ohm series termination near the MCU for high-speed SPI (>25 MHz). Keep ADC analog traces short and guarded with a ground trace to minimize digital crosstalk. Per the SAM C21 datasheet, place the AREF decoupling capacitor (100 nF) within 5 mm of the AREF pin when using the internal voltage reference for ADC measurements.
Do not leave unused SERCOM I/O pins floating; configure them as output-low or input with internal pull-up to avoid parasitic current draw. Verify the SAM C21 Family silicon revision against published errata documents - revision A parts have specific DAC and ADC issues fixed in revision B+. The GCLK peripheral must be configured before enabling SERCOM clocks, otherwise peripheral initialization silently fails. Always issue a software reset of unused peripherals to minimize quiescent current.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade (AUT suffix) is not AEC-Q100 qualified; Microchip offers separate SAM C21 automotive-grade part numbers for AEC-Q100 designs. Lead-free matte tin (JESD-609 e3) terminal finish confirmed by DigiKey listing. Halogen-free status not explicitly stated in available data.
