ATSAMC21G18A-AUT - 256KB Flash 48MHz Cortex-M0+ MCU | Microchip
MPN: ATSAMC21G18A-AUT ✓ NakahandaATSAMC21G18A-AUT Ulas
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ is the smallest and most energy-efficient core in the Cortex-M family, designed for deeply embedded, deterministic 32-bit applications. It belongs to the broader microcontroller (MCU) hierarchy (microcontroller -> embedded processor -> semiconductor IC) and supersedes legacy 8/16-bit architectures by adding a 32-bit datapath, NVIC, and modern toolchain support while retaining ultra-low active and sleep currents. The SAM C21 series targets industrial and commercial designs in electrically noisy environments.
Key features of the ATSAMC21G18A-AUT include: SERCOM (Serial Communication Interface) modules that can be independently configured as UART, SPI, or I2C; a CAN-FD controller for high-bandwidth automotive networking; a 12-bit ADC, 10-bit DAC, and analog comparators; PWM timers with complementary outputs and dead-time insertion for motor control; and 5V-tolerant I/O allowing direct interface to legacy 5V peripherals without level shifters.
On the architecture side, the device uses the Cortex-M0+ v6M instruction set with a 2-stage pipeline, single-cycle I/O port access, and tightly-coupled SRAM for deterministic interrupt response. The CAN-FD peripheral supports ISO 11898-1:2015 frames with up to 64-byte payloads, and the SERCOM engine allows flexible pin mapping via the I/O multiplexing matrix.
Typical applications include industrial automation (sensor hubs, PLC I/O modules), automotive body and chassis electronics (using CAN-FD), building automation (HVAC, lighting controllers), home appliances, and low-cost motor control such as small BLDC or stepper drivers. AEC-Q100 grade 1 qualification also enables under-hood and dashboard deployment.
When designing with this MCU, plan the I/O multiplexing early because SERCOM and timer functions share mapping; Microchip's MPLAB Harmony Configurator (MCC) pin manager simplifies assignment. The 5V-tolerant pins tolerate but do not drive 5V outputs, so external level shifting is required when communicating with true 5V peripherals.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Mga alternatibo na pwedeng ilagay na ATSAMC21G18A-AUT — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ATSAMC21G18A-AUT (parehas na form factor at footprint) — pagkakaiba sa ADC, Package, Operating Temperature, SERCOM Modules, SRAM.
ATSAMC21G18A-AU
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATSAMC21G18A-MUT
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ATSAMC21G18A-AUT Mga Pinakamataas na Rating at Electrical Characteristics
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum Clock Speed | 48 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| EEPROM Emulation Region | 8 KB independent self-programmable Flash |
| RAM Size | 32 KB SRAM |
| Volte ng Pagbibigay | 2.7 V to 5.5 V |
| I/O Voltage Tolerance | 5V-tolerant digital I/O |
| ADC | 12-bit |
| DAC | 10-bit |
| Communication Interfaces | SERCOM (UART/SPI/I2C), CAN-FD, I2S |
| Packhaging | 48-TQFP (7x7 mm) |
| Temperature na Operasyon | -40C to +125C (automotive grade) |
| Uri ng Pagpapasok | Surface Mount |
| AEC-Q100 | Qualified (Grade 1, automotive) |
| Level ng MSL | 3 (168 hours) |
| Tindminan RoHS | Compliant |
| Lead-Free | Yes |
Pin Configuration ng ATSAMC21G18A-AUT
| Pin 1 | PA00 — General purpose I/O / SERCOM pad |
| Pin 2 | PA01 — General purpose I/O / SERCOM pad |
| Pin 3 | PA02 — General purpose I/O / ADC input |
| Pin 4 | PA03 — General purpose I/O / ADC reference |
| Pin 5 | GND — Ground |
| Pin 6 | VDD |
| Pin 7 | PA04 — General purpose I/O / SERCOM pad |
| Pin 8 | PA05 — General purpose I/O / SERCOM pad |
| Pin 9 | PA06 — General purpose I/O / SERCOM pad |
| Pin 10 | PA07 — General purpose I/O / SERCOM pad |
| Pin 11 | PA08 — General purpose I/O / SERCOM pad |
| Pin 12 | PA09 — General purpose I/O / SERCOM pad |
| Pin 13 | PA10 — General purpose I/O / SERCOM pad |
| Pin 14 | PA11 — General purpose I/O / SERCOM pad |
| Pin 15 | VDDIO — I/O voltage supply |
| Pin 16 | GND — Ground |
| Pin 17 | PA12 — General purpose I/O / SERCOM pad |
| Pin 18 | PA13 — General purpose I/O / SERCOM pad |
| Pin 19 | PA14 — General purpose I/O / SERCOM pad |
| Pin 20 | PA15 — General purpose I/O / SERCOM pad |
| Pin 21 | PA16 — General purpose I/O / SERCOM pad |
| Pin 22 | PA17 — General purpose I/O / SERCOM pad |
| Pin 23 | PA18 — General purpose I/O / SERCOM pad |
| Pin 24 | PA19 — General purpose I/O / SERCOM pad |
| Pin 25 | PA20 — General purpose I/O / SERCOM pad |
| Pin 26 | PA21 — General purpose I/O / SERCOM pad |
| Pin 27 | PA22 — General purpose I/O / SERCOM pad |
| Pin 28 | PA23 — General purpose I/O / SERCOM pad |
| Pin 29 | PA24 — General purpose I/O / SERCOM pad |
| Pin 30 | PA25 — General purpose I/O / SERCOM pad |
| Pin 31 | GND — Ground |
| Pin 32 | VDD — Core voltage regulator input |
| Pin 33 | PB00 — General purpose I/O / SERCOM pad |
| Pin 34 | PB01 — General purpose I/O / SERCOM pad |
| Pin 35 | PB02 — General purpose I/O / SERCOM pad |
| Pin 36 | PB03 — General purpose I/O / SERCOM pad |
| Pin 37 | PB04 — General purpose I/O / SERCOM pad |
| Pin 38 | PB05 — General purpose I/O / SERCOM pad |
| Pin 39 | PB06 — General purpose I/O / SERCOM pad |
| Pin 40 | PB07 — General purpose I/O / SERCOM pad |
| Pin 41 | PB08 — General purpose I/O / SERCOM pad |
| Pin 42 | PB09 — General purpose I/O / SERCOM pad |
| Pin 43 | PB10 — General purpose I/O / SERCOM pad |
| Pin 44 | PB11 — General purpose I/O / SERCOM pad |
| Pin 45 | VDDIO — I/O voltage supply |
| Pin 46 | GND — Ground |
| Pin 47 | NRST — Reset input (active-low) |
| Pin 48 | SWDIO — SWD debug data |
Tipikal na mga Gamit
ATSAMC21G18A-AUT ay nararapat para sa 6 aplikasyons: Automotive Body Electronics with CAN-FD, Industrial Sensor Hubs and PLC I/O, BLDC and Stepper Motor Control, Building Automation (HVAC and Lighting), Home Appliance User Interface Controllers, Automotive Dashboard and Instrument Panels.
Automotive Body Electronics with CAN-FD
The ATSAMC21G18A-AUT's integrated CAN-FD controller supporting ISO 11898-1:2015 frames with up to 64-byte payloads makes it ideal for automotive body electronics such as seat controllers, mirror adjusters, and door modules. The AEC-Q100 Grade 1 qualification ensures reliable operation at -40C to +125C under hood and cabin thermal stress. The 256KB Flash accommodates J1939 and CANopen protocol stacks alongside application code.
Inirekomenda
Industrial Sensor Hubs and PLC I/O
The 5V-tolerant I/O and SERCOM modules of the ATSAMC21G18A-AUT allow direct interfacing with industrial 5V sensors, optocouplers, and actuator drivers without level shifters. The 12-bit ADC with internal reference and the 10-bit DAC support analog signal conditioning for 4-20mA loops and bridge sensors. The 32KB SRAM handles protocol stacks for Modbus RTU or IO-Link while the MPU isolates safety-critical tasks.
Inirekomenda
BLDC and Stepper Motor Control
The PWM timers with complementary outputs and dead-time insertion in the ATSAMC21G18A-AUT directly drive three-phase BLDC motor inverters or stepper motor bridges. The 48MHz core executes field-oriented control (FOC) algorithms at 10kHz switching frequency with margin to spare. The QFP package's exposed pad provides thermal relief for continuous motor drive operation.
Inirekomenda
Building Automation (HVAC and Lighting)
The ATSAMC21G18A-AUT's combination of CAN-FD, SERCOM, and analog peripherals suits building automation controllers for HVAC dampers, lighting dimmers, and occupancy sensors. The 5V tolerance allows direct interface with triac drivers and legacy building automation buses. The AEC-Q100 qualification enables deployment in equipment rooms with extended temperature ranges.
Inirekomenda
Home Appliance User Interface Controllers
The Peripheral Touch Controller (PTC) in the ATSAMC21G18A-AUT supports capacitive touch buttons and sliders for appliance front panels without external touch ICs. The SERCOM modules connect to Wi-Fi/BLE modules for smart appliance connectivity while CAN-FD interfaces with the main appliance control board. The 8KB EEPROM emulation Flash stores user settings and calibration data.
Inirekomenda
Automotive Dashboard and Instrument Panels
The ATSAMC21G18A-AUT's AEC-Q100 Grade 1 qualification and CAN-FD capability suit automotive dashboard controllers that aggregate data from body and chassis modules. The 5V-tolerant I/O drives segment LCDs or LED indicators directly, while SERCOM channels connect to rotary encoders and button matrices. The -40C to +125C operating range handles under-dash thermal extremes.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATSAMC21G18A-AUT — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATSAMC21G18A-AU |
|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology |
| Core Processor | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Speed | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB |
| CAN-FD | Yes | Yes |
| 5V Tolerant I/O | Yes | Yes |
| AEC-Q100 Qualification | Yes (Grade 1) | No (industrial) |
| Operating Temperature | -40C to +125C | -40C to +85C |
Pangunahing mga Pagkakaiba
- AEC-Q100 Grade 1 automotive qualification (kumpara saATSAMC21G18A-AU (industrial grade))
- Integrated CAN-FD controller (kumpara saATSAMD21G18A-AU (USB, no CAN))
- 5V-tolerant digital I/O (kumpara saTypical 3.3V Cortex-M0+ MCUs)
Talaan ng Disenyo
The ATSAMC21G18A-AUT operates from 2.7V to 5.5V with separate VDDIO and VDD pins for I/O and core supplies. Place 100nF decoupling capacitors as close as possible to each VDD and VDDIO pin, with a bulk 10uF capacitor on the main supply rail. The internal voltage regulator requires adequate bulk capacitance on VDDIN to handle transient load steps during flash programming.
The 48-pin TQFP package has a 0.5mm pitch and 7x7mm body size. Route the SWD signals (SWDIO, SWCLK) away from high-frequency switching nodes and provide a ground reference for impedance control. The SERCOM and timer functions share pins through an I/O multiplexing matrix - plan pin assignments early using Microchip's MPLAB Harmony Configurator pin manager.
The 5V-tolerant I/O pins tolerate 5V input but only drive 3.3V output levels - external level shifters are required for true 5V peripheral communication. The CAN-FD peripheral requires an external transceiver such as the MCP2562FD; the MCU only handles the protocol layer. The 8KB EEPROM emulation Flash is independent of the main Flash and must be managed separately for wear leveling.
The ATSAMC21G18A-AUT in the 48-TQFP package has a thermal resistance of approximately 60 C/W (theta_JA) on a standard 4-layer JEDEC test board. At 48MHz active mode with all peripherals running, power consumption is typically 8-10mA. In standby with RTC running, consumption drops to under 10uA. The AEC-Q100 Grade 1 qualification ensures operation from -40C to +125C ambient.
Impormasyon ng Pagsunod sa Kautusan
AEC-Q100 Grade 1 qualified per Microchip product page. RoHS and REACH compliant. Lead-free packaging. Halogen-free status not explicitly stated in available data.
