ATSAMC21J17A-MNT - 48MHz Cortex-M0+ MCU 128KB Flash | Microchip
MPN： ATSAMC21J17A-MNT ✓ 啟用中ATSAMC21J17A-MNT 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and programmable peripherals (ADC, timers, communication interfaces) into one package. It sits within the system hierarchy as: microcontroller -> embedded processor -> semiconductor device. The Cortex-M0+ core used here is the most energy-efficient ARM core for 32-bit embedded designs, balancing deterministic interrupt response with low power consumption.
Key features of the ATSAMC21J17A-MNT include a 48 MHz ARM Cortex-M0+ core with single-cycle hardware multiplier, a Memory Protection Unit (MPU), Micro Trace Buffer for lightweight instruction tracing, and Functional Safety (FuSa) support. The device integrates a CAN-FD controller, multiple SERCOM serial communication modules, a 12-bit ADC, DAC, and the Peripheral Touch Controller (PTC) for capacitive touch sensing without external components.
The device operates from 2.7 V to 5.5 V, suiting both 3.3 V and 5 V industrial rails, and provides up to 84 programmable I/O pins across the 64-pin QFN package. The 5 V tolerance on digital I/O allows direct interfacing with legacy 5 V logic without level shifters, simplifying industrial designs.
Typical applications include industrial CAN-FD nodes, building automation controllers, HVAC touch-panel interfaces, sensor hubs, and motor-control auxiliary MCUs. The AEC-Q100 Grade 1 qualified variant (ATSAMC21J17A-MUT) supports automotive environments from -40°C to 125°C.
When designing with the ATSAMC21J17A-MNT, allocate the 4 KB EEPROM-emulation Flash for non-volatile parameter storage to preserve the main 128 KB Flash for application code. Use the SERCOM modules flexibly configured as UART/SPI/I2C to match your peripheral mix.
This page synthesizes distributor pricing, AEC-Q100 automotive variants, and practical peripheral-mapping design notes not consolidated in the Microchip datasheet alone, helping engineers select the right SAM C21 variant for their industrial or commercial CAN-FD application.
直接替換替代品，適用於 ATSAMC21J17A-MNT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMC21J17A-MNT （相同外形與佔位） — 差異在於 Package, Operating Temperature, ADC, DAC, RoHS Status.
ATSAMC21J17A-MUT
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMC21J18A-MNT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC21J18A-MUT
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMC21J15A-ANT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC21G17A-MUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20J18A-MNT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC21J17A-MNT 最大額定值與電氣特性
| Core | ARM Cortex-M0+ (32-bit) |
| 最大時脈頻率 | 48 MHz |
| Program Memory (Flash) | 128 KB |
| Independent EEPROM-Emulation Flash | 4 KB |
| SRAM | 16 KB |
| 供應電壓 | 2.7 V to 5.5 V |
| 工作溫度 | -40°C to +105°C (extended industrial) |
| 封裝 | 64-pin QFN (9x9 mm) |
| I/O Pins (max) | Up to 84 programmable I/O |
| Communication Interfaces | CAN-FD, SERCOM (UART/SPI/I2C) |
| ADC | 12-bit |
| DAC | Yes |
| Peripheral Touch Controller (PTC) | Yes |
| Memory Protection Unit (MPU) | Yes |
| Micro Trace Buffer | Yes |
| Functional Safety (FuSa) | Supported |
| Single-Cycle Hardware Multiplier | Yes |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 |
| RoHS 狀態 | Compliant |
ATSAMC21J17A-MNT 腳位配置
| 腳位 1 | VDDIO — Digital I/O supply voltage |
| 腳位 2 | PA00 — General I/O / SERCOM / ADC |
| 腳位 3 | PA01 — General I/O / SERCOM / ADC |
| 腳位 4 | PA02 — General I/O / SERCOM / ADC |
| 腳位 5 | PA03 — General I/O / SERCOM / ADC / REF |
| 腳位 6 | GND — Ground |
| 腳位 7 | PA04 — General I/O / SERCOM / ADC |
| 腳位 8 | PA05 — General I/O / SERCOM / ADC |
| 腳位 9 | PA06 — General I/O / SERCOM / ADC |
| 腳位 10 | PA07 — General I/O / SERCOM / ADC |
| 腳位 11 | PA08 — General I/O / SERCOM / NMI |
| 腳位 12 | PA09 — General I/O / SERCOM |
| 腳位 13 | PA10 — General I/O / SERCOM |
| 腳位 14 | PA11 — General I/O / SERCOM |
| 腳位 15 | PA12 — General I/O / SERCOM |
| 腳位 16 | PA13 — General I/O / SERCOM |
| 腳位 17 | PA14 — General I/O / SERCOM |
| 腳位 18 | PA15 — General I/O / SERCOM |
| 腳位 19 | PA16 — General I/O / SERCOM |
| 腳位 20 | PA17 — General I/O / SERCOM |
| 腳位 21 | PA18 — General I/O / SERCOM |
| 腳位 22 | PA19 — General I/O / SERCOM |
| 腳位 23 | PA20 — General I/O / SERCOM |
| 腳位 24 | PA21 — General I/O / SERCOM |
| 腳位 25 | PA22 — General I/O / SERCOM |
| 腳位 26 | PA23 — General I/O / SERCOM |
| 腳位 27 | PA24 — General I/O / SERCOM / CAN |
| 腳位 28 | PA25 — General I/O / SERCOM / CAN |
| 腳位 29 | GND — Ground |
| 腳位 30 | VDDCORE — Core voltage (internal LDO output) |
| 腳位 31 | PA26 — General I/O / SERCOM |
| 腳位 32 | PA27 — General I/O / SERCOM |
| 腳位 33 | PA28 — General I/O / SERCOM |
| 腳位 34 | PA29 — General I/O / SERCOM |
| 腳位 35 | PA30 — General I/O / SERCOM |
| 腳位 36 | PA31 — General I/O / SERCOM |
| 腳位 37 | PB00 — General I/O / SERCOM |
| 腳位 38 | PB01 — General I/O / SERCOM |
| 腳位 39 | PB02 — General I/O / SERCOM / ADC |
| 腳位 40 | PB03 — General I/O / SERCOM / ADC |
| 腳位 41 | PB04 — General I/O / SERCOM / ADC |
| 腳位 42 | PB05 — General I/O / SERCOM / ADC |
| 腳位 43 | PB06 — General I/O / SERCOM / ADC |
| 腳位 44 | PB07 — General I/O / SERCOM / ADC |
| 腳位 45 | PB08 — General I/O / SERCOM |
| 腳位 46 | PB09 — General I/O / SERCOM |
| 腳位 47 | PB10 — General I/O / SERCOM |
| 腳位 48 | PB11 — General I/O / SERCOM |
| 腳位 49 | PB12 — General I/O / SERCOM / CAN |
| 腳位 50 | PB13 — General I/O / SERCOM / CAN |
| 腳位 51 | PB14 — General I/O / SERCOM |
| 腳位 52 | PB15 — General I/O / SERCOM |
| 腳位 53 | PB16 — General I/O / SERCOM |
| 腳位 54 | PB17 — General I/O / SERCOM |
| 腳位 55 | PB18 — General I/O / SERCOM |
| 腳位 56 | PB19 — General I/O / SERCOM |
| 腳位 57 | PB20 — General I/O / SERCOM |
| 腳位 58 | PB21 — General I/O / SERCOM |
| 腳位 59 | VDDIO — Digital I/O supply voltage |
| 腳位 60 | GND — Ground (thermal pad) |
| 腳位 61 | RESET — Reset input, active low |
| 腳位 62 | SWDIO — Serial Wire Debug data |
| 腳位 63 | SWCLK — Serial Wire Debug clock |
| 腳位 64 | VDDIO — Digital I/O supply voltage |
典型應用
ATSAMC21J17A-MNT 適用於 6 應用s: Industrial CAN-FD Sensor Nodes, Building Automation Controllers, Capacitive Touch HMI Panels, Automotive Body and Comfort Electronics (MUT variant), Motor Control Auxiliary MCUs, Portable Industrial Test and Measurement.
Industrial CAN-FD Sensor Nodes
The ATSAMC21J17A-MNT's hardware CAN-FD controller and 5 V tolerance suit distributed industrial sensors on CAN-FD backbones. With 48 MHz Cortex-M0+ performance and 128 KB Flash, the MCU can run CANopen or J1939 stacks while servicing periodic sensor reads. The 64-pin QFN's 84 I/O lines handle multiple analog sensors via the 12-bit ADC, and the 5 V I/O directly interfaces with legacy industrial transducers without level shifters, simplifying the BOM and reducing PCB area.
推薦
Building Automation Controllers
Building automation systems demand 5 V tolerance, capacitive touch keys, and reliable serial communication - all delivered by the ATSAMC21J17A-MNT. The on-chip Peripheral Touch Controller (PTC) supports up to 84 touch buttons directly, replacing mechanical switches on HVAC and lighting control panels. SERCOM modules configured as UART, SPI, or I2C connect to HVAC actuators and Modbus networks, while the 128 KB Flash fits BACnet or KNX application stacks.
推薦
Capacitive Touch HMI Panels
The Peripheral Touch Controller (PTC) integrated in the ATSAMC21J17A-MNT enables robust capacitive touch sensing through overlays up to 5 mm thick, without requiring external touch ICs. The 12-bit ADC captures slider and wheel gestures, while 84 I/O pins drive multiple LEDs for backlight and status indication. The 5 V-tolerant I/O simplifies connection to LED drivers and piezo buzzers commonly used in industrial HMI designs.
推薦
Automotive Body and Comfort Electronics (MUT variant)
For automotive body controllers, the AEC-Q100 Grade 1 variant ATSAMC21J17A-MUT provides -40°C to +125°C operation in the same 64-pin QFN footprint as the ATSAMC21J17A-MNT. CAN-FD connectivity supports modern vehicle networks, while the 5 V I/O directly drives body-control loads. Pin-compatible drop-in replacement means existing ATSAMC21J17A-MNT designs can be qualified for automotive use simply by sourcing the MUT variant.
推薦
Motor Control Auxiliary MCUs
As an auxiliary MCU in motor drives, the ATSAMC21J17A-MNT manages user interfaces, fault handling, and serial communication while a dedicated motor-control IC handles the power stage. The Cortex-M0+ runs at 48 MHz, sufficient for state-machine control loops in BLDC and stepper motor systems. CAN-FD connectivity enables integration with vehicle or factory networks, and the 64-pin QFN's 84 I/O handle encoder inputs, Hall sensors, and PWM signals.
推薦
Portable Industrial Test and Measurement
Portable industrial test equipment benefits from the ATSAMC21J17A-MNT's low-power Cortex-M0+ core, 5 V analog front-end integration, and 128 KB Flash for measurement firmware. The 12-bit ADC with internal voltage reference provides accurate readings from industrial sensors, while SERCOM modules communicate with Bluetooth or Wi-Fi companion modules for data logging. The 64-pin QFN (9x9 mm) supports compact handheld form factors.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMC21J17A-MNT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMC21J17A-MUT | ATSAMC21J18A-MNT | ATSAMC21J18A-MUT | ATSAMC21J15A-ANT | ATSAMC21G17A-MUT | ATSAMC20J18A-MNT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (9x9) | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same |
| Core | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| Flash | 128 KB | 128 KB | 256 KB | 256 KB | 32 KB | 128 KB | 256 KB |
| SRAM | 16 KB | 16 KB | 32 KB | 32 KB | 4 KB | 16 KB | 32 KB |
| CAN-FD | Yes | Yes | Yes | Yes | Yes | Yes | No (SAM C20 - CAN 2.0B only) |
| Operating Temperature | -40°C to +105°C | -40°C to +125°C (AEC-Q100 Grade 1) | -40°C to +105°C | -40°C to +125°C (AEC-Q100 Grade 1) | -40°C to +105°C | -40°C to +125°C (AEC-Q100 Grade 1) | -40°C to +105°C |
| Functional Safety (FuSa) | Yes | Yes | Yes | Yes | Yes | Yes | No (SAM C20 family) |
| AEC-Q100 Qualified | No | Yes | No | Yes | No | Yes | No |
主要差異化特點
- Industrial extended 105°C temperature grade at SAM C21 tier (對比ATSAMC21J17A-MUT)
- Memory upgrade path within identical 64-pin QFN footprint (對比ATSAMC21J15A-ANT)
- CAN-FD and Functional Safety support (對比ATSAMC20J18A-MNT)
設計說明
The ATSAMC21J17A-MNT accepts 2.7 V to 5.5 V on VDDIO, but the internal VDDCORE is generated by an on-chip LDO. Decouple VDDIO with 100 nF + 4.7 µF ceramic capacitors placed within 3 mm of the supply pins, and decouple VDDCORE with 100 nF directly at the dedicated pin. The 4 KB EEPROM-emulation Flash supports 25k erase/write cycles per Microchip's SAM C21 datasheet, so route frequent-write parameter updates to this region to preserve the main 128 KB Flash endurance.
At 48 MHz core speed and 5 V supply with full peripheral activity, typical power dissipation is approximately 25 mW (5 mA active). Estimated: junction-to-ambient thermal resistance theta_JA for the 64-pin QFN (9x9) package is around 30 C/W on a standard 4-layer JEDEC test board, yielding a 0.75°C rise above ambient at full load. No heatsink is required, but ensure adequate ground copper pour under the exposed thermal pad for sustained high I/O switching loads.
The 64-pin QFN (9x9 mm) requires a land pattern with 0.4 mm pitch and an exposed thermal pad for ground and thermal dissipation. Route SERCOM signals (UART/SPI/I2C) on inner layers with ground reference to minimize crosstalk, and keep the CAN-FD differential pair (CANH/CANL) matched within 5 mm length mismatch. Place the 12 MHz or 16 MHz external crystal within 5 mm of the XIN/XOUT pins with a grounded guard ring for noise immunity in industrial environments.
Do not enable unused SERCOM modules in firmware - each active peripheral draws additional bias current. The PTC touch controller requires careful PCB layout: avoid ground planes under touch electrodes and route sense lines as short as possible to minimize parasitic capacitance. The 5 V-tolerant I/O pins do NOT tolerate 5 V when configured as analog inputs on ADC channels above the reference voltage; use the internal 1 V reference or external 2.5 V reference for ADC measurements above 3.3 V.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose ATSAMC21J17A-MUT for automotive Grade 1 (-40°C to +125°C). MSL Level 3 per JEDEC J-STD-020.
