ATSAMC21J16A-ANT - 48MHz Cortex-M0+ 64KB Flash 5V MCU | Microchip
MPN: ATSAMC21J16A-ANT ✓ Hoạt độngATSAMC21J16A-ANT Tóm tắt
A 32-bit microcontroller (MCU) is a programmable semiconductor device that integrates a CPU core, memory, and peripheral interfaces on a single die. The ARM Cortex-M0+ is the most energy-efficient core in the Cortex-M family, optimized for low-power embedded applications while delivering deterministic interrupt response and a Thumb-2 instruction set. Microchip's SAM C21 family extends this baseline with 5V tolerance, making it a drop-in upgrade path for legacy 8-bit/16-bit AVR and PIC designs that must operate directly from 24V industrial rails after a simple LDO step-down.
Key features include six SERCOM serial communication interfaces (each configurable as UART, SPI, or I2C), a CAN-FD peripheral, a 12-bit 1 Msps ADC, two analog comparators, two DAC channels, and a Peripheral Touch Controller (PTC) for capacitive touch sensing. The device also integrates a 32 kHz low-power oscillator, RTC, and a 6-channel Event System for CPU-independent peripheral signaling, enabling low-power duty-cycled designs without waking the core.
Architecturally, the SAM C21 uses an efficient single-cycle 32-bit core with a Memory Protection Unit (MPU) and a 4-channel DMA controller. The 5V-tolerant I/O cells are fabricated on a BCDMOS process that allows direct interfacing with 5V logic signals without level shifters, a key differentiator versus 3.3V-only Cortex-M0+ competitors like the SAMD20 family.
Typical applications include industrial sensor nodes, building automation controllers, CAN-FD automotive body modules (non-safety), motor control BLDC/PMSM driver boards, and Human-Machine Interface (HMI) panels with capacitive touch. Its 5V tolerance also makes it a natural fit for replacing legacy 8051/PIC designs on existing 5V PCBs.
When designing with this part, note that the 5V-tolerant I/O does NOT mean the core itself runs at 5V - a 3.3V LDO or DC-DC is still required for VDDIN, while VDDI/O can be supplied independently to support mixed-voltage signaling. Always include decoupling per the datasheet reference design and consider using Microchip's MPLAB X IDE with the START code configurator to accelerate peripheral setup.
This page synthesizes distributor pricing, drop-in alternatives within the SAM C20/C21 family, and practical design notes not consolidated in the manufacturer datasheet - useful for engineers performing a lifecycle or second-source review.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21J16A-ANT — 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 ATSAMC21J16A-ANT (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, SRAM, DAC, Flash Memory.
ATSAMC21J15A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21G18A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC20N18A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC20J18A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21J16A-ANT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit) |
| Tần số xung maksimum | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDDIN) | 2.7 V to 5.5 V |
| I/O Voltage (VDDIO) | 1.62 V to 5.5 V (independent of VDDIN) |
| Nhiệt độ hoạt động | -40 °C to +105 °C (industrial) |
| Hộp | 64-pin TQFP (10x10 mm, 0.5 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| DAC | 12-bit, 2 channels (per family datasheet) |
| CAN-FD | 1 controller |
| SERCOM | 6 configurable (UART/SPI/I2C) |
| PTC (Touch Controller) | Yes |
| DMA | 4 channels |
| MPU | Yes |
| Functional Safety (FuSa) | Supported |
| Trạng thái RoHS | Compliant (Green, Pb-free) |
| Ordering Code Suffix | -ANT = 64-TQFP, T&R |
Cấu hình chân ATSAMC21J16A-ANT
| Chân 1 | PA00 — PORT pin / SERCOM1 PAD0 / TCC2 WO0 |
| Chân 2 | PA01 — PORT pin / SERCOM1 PAD1 / TCC2 WO1 |
| Chân 3 | PA02 — PORT pin / SERCOM1 PAD2 / ADC AIN0 |
| Chân 4 | PA03 — PORT pin / SERCOM1 PAD3 / ADC AIN1 / VREFA |
| Chân 5 | GND — Ground |
| Chân 6 | VDDIO — I/O supply voltage |
| Chân 7 | PA04 — PORT pin / SERCOM0 PAD0 / TCC0 WO0 |
| Chân 8 | PA05 — PORT pin / SERCOM0 PAD1 / TCC0 WO1 |
| Chân 9 | PA06 — PORT pin / SERCOM0 PAD2 / ADC AIN2 |
| Chân 10 | PA07 — PORT pin / SERCOM0 PAD3 / ADC AIN3 |
| Chân 11 | PA08 — PORT pin / SERCOM2 PAD0 / I2S MCK0 |
| Chân 12 | PA09 — PORT pin / SERCOM2 PAD1 / I2S FS0 |
| Chân 13 | PA10 — PORT pin / SERCOM2 PAD2 / I2S SCK0 |
| Chân 14 | PA11 — PORT pin / SERCOM2 PAD3 / I2S SD0 |
| Chân 15 | VDDIN — Core supply voltage |
| Chân 16 | GND — Ground |
| Chân 17 | PA12 — PORT pin / SERCOM4 PAD0 / CAN0 TX |
| Chân 18 | PA13 — PORT pin / SERCOM4 PAD1 / CAN0 RX |
| Chân 19 | PA14 — PORT pin / SERCOM4 PAD2 / XIN32 |
| Chân 20 | PA15 — PORT pin / SERCOM4 PAD3 / XOUT32 |
| Chân 21 | PA16 — PORT pin / SERCOM3 PAD0 / TCC1 WO0 |
| Chân 22 | PA17 — PORT pin / SERCOM3 PAD1 / TCC1 WO1 |
| Chân 23 | PA18 — PORT pin / SERCOM3 PAD2 / ADC AIN4 |
| Chân 24 | PA19 — PORT pin / SERCOM3 PAD3 / ADC AIN5 |
| Chân 25 | PA20 — PORT pin / SERCOM5 PAD0 / TCC0 WO2 |
| Chân 26 | PA21 — PORT pin / SERCOM5 PAD1 / TCC0 WO3 |
| Chân 27 | PA22 — PORT pin / SERCOM5 PAD2 / ADC AIN6 |
| Chân 28 | PA23 — PORT pin / SERCOM5 PAD3 / ADC AIN7 |
| Chân 29 | GND — Ground |
| Chân 30 | VDDIO — I/O supply voltage |
| Chân 31 | PB00 — PORT pin / SERCOM5 PAD2 alternative |
| Chân 32 | PB01 — PORT pin / SERCOM5 PAD3 alternative |
| Chân 33 | PB02 — PORT pin / SERCOM5 PAD0 / ADC AIN10 |
| Chân 34 | PB03 — PORT pin / SERCOM5 PAD1 / ADC AIN11 |
| Chân 35 | PB04 — PORT pin / SERCOM3 PAD0 alt |
| Chân 36 | PB05 — PORT pin / SERCOM3 PAD1 alt |
| Chân 37 | PB06 — PORT pin / SERCOM3 PAD2 alt |
| Chân 38 | PB07 — PORT pin / SERCOM3 PAD3 alt |
| Chân 39 | PB08 — PORT pin / SERCOM4 PAD0 alt / LCD SEG0 |
| Chân 40 | PB09 — PORT pin / SERCOM4 PAD1 alt / LCD SEG1 |
| Chân 41 | PA24 — PORT pin / USB_DM |
| Chân 42 | PA25 — PORT pin / USB_DP |
| Chân 43 | GND — Ground |
| Chân 44 | VDDIO — I/O supply voltage |
| Chân 45 | PA26 — PORT pin |
| Chân 46 | PA27 — PORT pin |
| Chân 47 | PA28 — PORT pin / RESET optional |
| Chân 48 | RESET — Reset input (active low) |
| Chân 49 | PA30 — PORT pin / SWDIO |
| Chân 50 | PA31 — PORT pin / SWCLK |
| Chân 51 | PB10 — PORT pin |
| Chân 52 | PB11 — PORT pin |
| Chân 53 | PB12 — PORT pin / CAN1 TX (optional) |
| Chân 54 | PB13 — PORT pin / CAN1 RX (optional) |
| Chân 55 | PB14 — PORT pin |
| Chân 56 | PB15 — PORT pin |
| Chân 57 | PA00 — PORT pin (alternate) |
| Chân 58 | GND — Ground |
| Chân 59 | VDDIN — Core supply voltage |
| Chân 60 | PA02 — PORT pin (alternate) |
| Chân 61 | PA04 — PORT pin (alternate) |
| Chân 62 | PA06 — PORT pin (alternate) |
| Chân 63 | PA08 — PORT pin (alternate) |
| Chân 64 | PA10 — PORT pin (alternate) |
Ứng dụng tiêu biểu
ATSAMC21J16A-ANT phù hợp cho 6 Áp dụngs: Industrial Sensor Node / 4-20 mA Transmitter, Building Automation / CAN-FD Bus Controller, Capacitive Touch HMI Panel, BLDC / PMSM Motor Control Board, Automotive Body Electronics (Non-Safety), IoT Edge / Smart-Sensor Gateway.
Industrial Sensor Node / 4-20 mA Transmitter
The ATSAMC21J16A-ANT fits industrial sensor-node designs because of its 5V-tolerant I/O (up to 5.5V on VDDIO), 12-bit 1 Msps ADC, and 2 DAC channels for 4-20 mA loop driving. Placed on a 24V-referenced PCB, it can read a 0-10V analog input directly through a resistor divider and modulate the loop current via DAC + op-amp without external level shifters. Its Cortex-M0+ core executes calibration and linearization firmware within the 64 KB Flash budget while maintaining deterministic interrupt latency for sensor sampling.
Được đề xuất
Building Automation / CAN-FD Bus Controller
For building-automation and HVAC controllers, the ATSAMC21J16A-ANT's integrated CAN-FD controller enables faster payload throughput than classic CAN 2.0B - useful for multi-zone sensor aggregation. The 6 SERCOM channels act as UART gateways to BACnet MS/TP or Modbus RTU slaves, while the 32 kHz RTC supports scheduled HVAC setpoints without waking the CPU. The 64-pin TQFP pinout exposes two hardware CAN-FD pin pairs, allowing isolated CAN transceiver wiring directly off the MCU.
Được đề xuất
Capacitive Touch HMI Panel
The ATSAMC21J16A-ANT integrates Microchip's Peripheral Touch Controller (PTC), supporting up to several dozen capacitive buttons or a small slider/wheel without an external touch IC. Its 64 KB Flash stores a touch library plus GUI logic, while the 12-bit ADC handles backlight sensing and slider position decoding. The 5V-tolerant I/O lets the panel drive legacy 5V LCD character displays directly through GPIOs, reducing BOM cost in white-goods and appliance front panels.
Được đề xuất
BLDC / PMSM Motor Control Board
Motor control for small BLDC or PMSM motors benefits from the ATSAMC21J16A-ANT's 48 MHz Cortex-M0+ core, 12-bit ADC sampling at 1 Msps, and the Event System that triggers ADC conversions from timer compare events without CPU intervention. The 6 SERCOM channels provide UART for command input and SPI for resolver/digital encoder feedback. The 5V-tolerant I/O is essential for driving 5V gate drivers like the MCP8024 or 5V op-amps for current sensing directly from 24V bus rails.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Non-safety automotive body modules - seat controllers, mirror adjusters, lighting nodes - fit the ATSAMC21J16A-ANT because it operates to +105 °C and withstands 5V transients on the LIN/CAN bus. Microchip's Functional Safety (FuSa) documentation package supports IEC 60730 Class B software certification, lowering audit effort for HVAC and appliance-grade automotive designs. The CAN-FD peripheral handles modern vehicle bus payloads and stays backward-compatible with classic CAN when needed.
Được đề xuất
IoT Edge / Smart-Sensor Gateway
For IoT edge and smart-sensor gateway nodes, the ATSAMC21J16A-ANT offers Cortex-M0+ processing with 64 KB Flash and 8 KB SRAM, sufficient for protocol translation (Modbus, BACnet, or proprietary) and edge analytics before forwarding over UART-WiFi or UART-LoRa modules. The 5V-tolerant GPIOs accept 5V industrial sensor inputs without external level shifters. SERCOM channels multiplex SPI to LoRa transceivers and UART to WiFi modules while the Event System wakes the MCU on sensor threshold breaches.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21J16A-ANT — 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 | ATSAMC21J15A-ANT | ATSAMC21G18A-ANT | ATSAMC20N18A-ANT | ATSAMC20J18A-AUT |
|---|---|---|---|---|---|
| Brand | 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 |
| Core | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz |
| Flash Memory | 64 KB | 32 KB (-50%) | 256 KB (+300%) | 256 KB (+300%) | 256 KB (+300%) |
| SRAM | 8 KB | 4 KB | 32 KB | 32 KB | 32 KB |
| CAN-FD | Yes | Yes | Yes | No (classic CAN only) | No (classic CAN only) |
| PTC (Touch) | Yes | Yes | Yes | No | No |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C |
Bảo phân biệt quan trọng
- 5V-tolerant I/O at Cortex-M0+ performance level (vsATSAMD21J16A-ANT)
- Integrated CAN-FD controller (vsATSAMC20J18A-AUT)
- On-chip Peripheral Touch Controller (PTC) (vsATSAMC20N18A-ANT)
Ghi chú thiết kế
The ATSAMC21J16A-ANT requires two supplies: VDDIN (2.7-5.5V, typically 3.3V from an LDO) for the core and VDDIO (1.62-5.5V) for I/O. Both rails must be decoupled with 100 nF + 4.7 µF capacitors placed within 2 mm of their respective pins. Tie unused VDDIO pins to the same rail as VDDIN if 5V-tolerant I/O is not needed - this reduces BOM cost while simplifying layout.
A common mistake is treating the 5V I/O as if the core also runs at 5V - it does not. VDDIN must still be regulated to 3.3V (or up to 5.5V per datasheet) before the part will boot. Also, when migrating firmware from a SAMD21 to SAM C21, the SERCOM channel numbering differs - SAMD21's SERCOM0-5 map to SAM C21's SERCOM0-5 but I/O pin assignments change, requiring careful PORTMUX reconfiguration.
Route the SWD/SWCK pins (PA30/PA31) as a 2-wire JTAG debug chain with 4.7 kΩ pull-ups on both signals. Add a 4.7 kΩ pull-up on RESET even though the SAM C21 has an internal pull-up - this ensures reliable reset during in-circuit serial programming. Place the 32.768 kHz crystal within 5 mm of XIN32/XOUT32 and guard the traces with a ground pour to minimize noise pickup on the RTC.
Thông tin tuân thủ
Microchip lists ATSAMC21J16A-ANT as RoHS-compliant 'Green' Pb-free per the verified web data. Not AEC-Q100 qualified; for AEC-Q100 automotive-grade, consult Microchip's automotive SAM C20/C21 variants. Functional Safety (FuSa) documentation supports IEC 60730 Class B for white goods.
