ATSAMC20G18A-MNT - 256KB Flash 48MHz Cortex-M0+ MCU | Microchip
Référence : ATSAMC20G18A-MNT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.85 | $6,85 |
| 10 | $6.12 | $61,20 |
| 100 | $5.4 | $540,00 |
| 500 | $4.78 | $2 390,00 |
| 1 000 | $4.25 | $4 250,00 |
ATSAMC20G18A-MNT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The Cortex-M0+ is ARM's smallest and most energy-efficient 32-bit core, used in deeply embedded applications where deterministic interrupt response and low power are essential. The SAM C20 series sits in Microchip's 5V-tolerant MCU portfolio between 8-bit PIC devices and higher-end Cortex-M4 SAM E/S70 parts, targeting motor control, CAN-FD nodes, and industrial sensor interfaces.
Key features include the SERCOM configurable serial communication module (six instances), one CAN-FD controller, a 12-bit ADC with up to 12 channels, a 16-bit Sigma-Delta ADC, analog comparators, a Peripheral Touch Controller (PTC), and a 6-channel Event System. The integrated 32.768 kHz oscillator and PLL enable accurate timing, while the 5V-tolerant I/O simplifies interfacing to industrial 5V logic without external level shifters.
Typical applications include CAN-FD node endpoints, industrial sensor transmitters, HVAC control boards, BLDC motor driver front-ends, low-cost appliances with capacitive touch, and building automation controllers. The wide operating temperature range (industrial, -40C to +105C for the MNT suffix) and CAN-FD peripheral make it particularly suited to industrial networked systems.
When designing with the ATSAMC20G18A-MNT, place the decoupling capacitor network (100 nF + bulk) within 3 mm of the VDD pins, expose the central thermal pad to a continuous copper pour to reduce junction-to-ambient thermal resistance, and verify trace impedance for the SWD debug lines. This page consolidates distributor pricing, drop-in alternatives within the SAM C20 family, and practical design guidance beyond the manufacturer datasheet.
Alternatives de remplacement direct pour ATSAMC20G18A-MNT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAMC20G18A-MNT (même facteur de forme et même empreinte) — différant par ADC, Package, Analog Comparators, Operating Temperature, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAMC20G18A-MUT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMC21G18A-MNT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMC20E18A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.92 / unité
Voir la fiche technique →ATSAMC20G16A-MNT
✅ Remplacement direct✓ En stock
$2.21 / unité
Voir la fiche technique →ATSAMC20G15A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.55 / unité
Voir la fiche technique →ATSAMC20G16A-AUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.65 / unité
Voir la fiche technique →ATSAMC20G18A-MNT Valeurs maximales et caractéristiques électriques
| Core Architecture | ARM Cortex-M0+ (32-bit, single-core) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 256 KB (256K x 8), in-system self-programmable |
| SRAM | 32 KB |
| Auxiliary Flash (EEPROM emulation) | 8 KB independent self-programmable |
| Boîtier | 48-VFQFN (QFN-48, 7x7 mm) with exposed pad |
| Operating Voltage (VDD) | 2.7 V to 5.5 V |
| 5V Tolerant I/O | Yes |
| Température de fonctionnement | -40C to +105C (industrial, MNT suffix) |
| SERCOM Modules | 6 configurable serial interfaces |
| CAN-FD | Yes (1 controller) |
| ADC | 12-bit, up to 12 channels; 16-bit Sigma-Delta ADC |
| Analog Comparators | Yes |
| Peripheral Touch Controller (PTC) | Yes |
| Event System Channels | 6 channels |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (Green) |
Configuration des broches de ATSAMC20G18A-MNT
| Broche 1 | PB05 — GPIO/SERCOM/I2C |
| Broche 2 | PB06 — GPIO/SERCOM/I2C |
| Broche 3 | PB07 — GPIO/SERCOM/I2C |
| Broche 4 | PB08 — GPIO/SERCOM/I2C |
| Broche 5 | PB09 — GPIO/SERCOM/I2C |
| Broche 6 | PA04 — GPIO/ADC/PTC |
| Broche 7 | PA05 — GPIO/ADC/PTC |
| Broche 8 | PA06 — GPIO/ADC/PTC |
| Broche 9 | PA07 — GPIO/ADC/PTC |
| Broche 10 | PA08 — GPIO/SERCOM/I2C |
| Broche 11 | PA09 — GPIO/SERCOM/I2C |
| Broche 12 | PA10 — GPIO/SERCOM/I2C |
| Broche 13 | PA11 — GPIO/SERCOM/I2C |
| Broche 14 | VDDIO — Digital I/O supply (2.7-5.5V) |
| Broche 15 | GND — Ground |
| Broche 16 | VDDANA — Analog supply (2.7-5.5V) |
| Broche 17 | GNDANA — Analog ground |
| Broche 18 | PA14 — GPIO/SERCOM/SWDCLK |
| Broche 19 | PA15 — GPIO/SERCOM/SWDIO |
| Broche 20 | PA16 — GPIO/SERCOM/I2C |
| Broche 21 | PA17 — GPIO/SERCOM/I2C |
| Broche 22 | PA18 — GPIO/SERCOM/I2C |
| Broche 23 | PA19 — GPIO/SERCOM/I2C |
| Broche 24 | PA20 — GPIO/SERCOM/I2C |
| Broche 25 | PA21 — GPIO/SERCOM/I2C |
| Broche 26 | PB10 — GPIO/SERCOM/I2C |
| Broche 27 | PB11 — GPIO/SERCOM/I2C |
| Broche 28 | PB12 — GPIO/SERCOM/I2C |
| Broche 29 | PB13 — GPIO/SERCOM/I2C |
| Broche 30 | PB14 — GPIO/SERCOM/I2C |
| Broche 31 | PB15 — GPIO/SERCOM/I2C |
| Broche 32 | PA22 — GPIO/SERCOM/I2C |
| Broche 33 | PA23 — GPIO/SERCOM/I2C |
| Broche 34 | PA24 — GPIO/SERCOM/I2C |
| Broche 35 | PA25 — GPIO/SERCOM/I2C |
| Broche 36 | PB16 — GPIO/SERCOM/I2C |
| Broche 37 | PB17 — GPIO/SERCOM/I2C |
| Broche 38 | PB18 — GPIO/SERCOM/I2C |
| Broche 39 | PB19 — GPIO/SERCOM/I2C |
| Broche 40 | PB20 — GPIO/SERCOM/I2C |
| Broche 41 | PB21 — GPIO/SERCOM/I2C |
| Broche 42 | PA27 — GPIO/SERCOM/I2C |
| Broche 43 | RESETn — Active-low reset input |
| Broche 44 | VDDCORE — Internal core voltage output (decouple to GND) |
| Broche 45 | GND — Ground |
| Broche 46 | XIN32 — 32.768 kHz crystal input |
| Broche 47 | XOUT32 — 32.768 kHz crystal output |
| Broche 48 | PA30 — GPIO/SERCOM/I2C |
Applications typiques
ATSAMC20G18A-MNT convient pour 7 applications: CAN-FD Industrial Sensor Node, BLDC Motor Control Front-End, Capacitive Touch Appliance Control Panel, Building Automation Controller, Low-Cost USB-to-Serial Converter Module, Industrial 5V Logic Replacement, Battery-Backed Sensor Data Logger.
CAN-FD Industrial Sensor Node
The ATSAMC20G18A-MNT's integrated CAN-FD controller and 5V-tolerant I/O make it well-suited for industrial sensor nodes communicating over modern CAN-FD backbones. The 256KB Flash accommodates full CANopen or J1939 protocol stacks plus application logic, while the 32KB SRAM handles transmit/receive buffers and runtime sensor fusion. Compared to 3.3V-only Cortex-M0+ parts, the 2.7-5.5V supply eliminates external level shifters for 5V analog front-ends. The industrial -40C to +105C temperature rating (MNT suffix) supports factory-floor deployments without derating, and the Peripheral Touch Controller enables capacitive operator buttons alongside analog sensor inputs in the same node.
Recommandé
BLDC Motor Control Front-End
The ATSAMC20G18A-MNT drives BLDC motor control loops by sampling back-EMF via its 12-bit ADC and 16-bit Sigma-Delta ADC, then commutating the inverter through PWM channels. The 48 MHz Cortex-M0+ core executes Field-Oriented Control (FOC) algorithms within the 256KB Flash budget, and the 32KB SRAM retains the Park/Clarke transform state. The 6-channel Event System interlinks ADC conversion completion to PWM update with deterministic latency, reducing torque ripple. Compared to 8-bit PIC alternatives, the Cortex-M0+ provides predictable interrupt response and a unified toolchain via MPLAB X and Harmony 3.
Recommandé
Capacitive Touch Appliance Control Panel
The integrated Peripheral Touch Controller (PTC) allows the ATSAMC20G18A-MNT to scan a matrix of capacitive touch buttons or sliders without an external touch IC, reducing BOM cost in washing machines, microwaves, and HVAC controllers. The 256KB Flash stores complex UI state machines, OTA update routines, and capacitive touch self-calibration algorithms. The 5V-tolerant I/O simplifies direct interfacing to legacy 5V LED indicators and seven-segment displays. The industrial temperature grade and built-in PTC noise-immunity algorithms (hardware oversampling and frequency hopping) ensure reliable touch detection in electrically noisy environments with motor drives nearby.
Recommandé
Building Automation Controller
In HVAC and building-automation controllers, the ATSAMC20G18A-MNT acts as the local sensor-processing and communication hub. Six SERCOM instances configure independently as UART for Modbus RTU, I2C for sensor I/O, or SPI for external display memory. The CAN-FD controller interfaces to a building-automation backbone (e.g., BACnet MS/TP over CAN or proprietary CAN-FD), while the 32KB SRAM caches schedule and occupancy data. The wide 2.7-5.5V supply permits direct connection to 24VAC-derived DC rails after rectification, simplifying power-supply design in retrofit installations.
Recommandé
Low-Cost USB-to-Serial Converter Module
Although the ATSAMC20G18A-MNT does not include native USB, it can implement USB-CDC firmware on one SERCOM-configured UART via external USB-UART bridges, or by bit-banging a soft-USB stack in the 32KB SRAM and 256KB Flash. The 48 MHz Cortex-M0+ provides enough cycles for 12 Mbps USB Full-Speed signaling alongside the main application. The 5V I/O simplifies direct interfacing to legacy RS-232 line drivers without external protection circuitry, and the 48-VFQFN package fits into compact converter dongles. Compared to dedicated USB-UART ICs, the SAM C20 adds programmability for protocol translation (I2C/SPI-to-UART bridges).
Recommandé
Industrial 5V Logic Replacement
The ATSAMC20G18A-MNT is increasingly used to replace aging 8-bit and 16-bit microcontrollers in legacy industrial 5V systems, providing 32-bit Cortex-M0+ performance with full 5V I/O tolerance. Existing 5V PCB designs (sensors, motor drivers, displays) can be modernized without replacing analog front-ends. The 256KB Flash and 32KB SRAM support modern software stacks (FreeRTOS, lightweight TCP/IP, USB device class) that would not fit on legacy 8-bit parts. The integrated CAN-FD and PTC add functionality that previously required multiple external ICs, reducing the overall BOM.
Recommandé
Battery-Backed Sensor Data Logger
With its Cortex-M0+ Sleep modes drawing only a few microamps and the 8KB auxiliary Flash supporting EEPROM emulation, the ATSAMC20G18A-MNT serves as a self-contained data logger for slow-changing sensor data (temperature, humidity, pressure). The 32KB SRAM buffers raw samples before periodic flush to main Flash, and the RTC with 32.768 kHz crystal input enables accurate timestamping with minimal power. The 5V-tolerant ADC inputs accept legacy industrial transducer signals directly. The 48-VFQFN package allows compact PCB integration with the sensor and a coin-cell or supercap backup, all within industrial -40C to +105C operating range.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAMC20G18A-MNT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAMC20G18A-MUT | ATSAMC21G18A-MNT | ATSAMC20E18A-MUT | ATSAMC20G16A-MNT | ATSAMC20G15A-MUT | ATSAMC20G16A-AUT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VFQFN (7x7 mm) | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same |
| Core | ARM Cortex-M0+ @ 48 MHz | ARM Cortex-M0+ @ 48 MHz | ARM Cortex-M0+ @ 48 MHz (with HW divide) | ARM Cortex-M0+ @ 48 MHz (enhanced) | ARM Cortex-M0+ @ 48 MHz | ARM Cortex-M0+ @ 48 MHz | ARM Cortex-M0+ @ 48 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 64 KB | 32 KB | 64 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 8 KB | 16 KB |
| CAN-FD | Yes (1) | Yes (1) | Yes (1) | Yes (1) | Yes (1) | Yes (1) | Yes (1) |
| Temperature Grade | Industrial -40C to +105C | Industrial -40C to +105C | Industrial -40C to +105C | Industrial -40C to +105C | Industrial -40C to +105C | Industrial -40C to +105C | Automotive -40C to +125C |
| 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 | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Approx. Unit Price @ 100 pcs (USD) | 5.40 | 5.40 | 6.20 | 5.95 | 4.50 | 4.10 | 5.20 |
Principaux différenciateurs
- Integrated CAN-FD controller without external transceiver MCU dependency (vs PIC16F1938-I/SS)
- 256 KB Flash and 32 KB SRAM at industrial price tier (vs ATSAMC20G16A-MNT)
- 5V-tolerant I/O eliminates external level shifters (vs ATSAMD20G18A-AU)
- MNT industrial temperature grade with 5V CAN-FD (vs ATSAMC20G18A-MUT)
Notes de conception
Place a 100 nF decoupling capacitor within 3 mm of each VDDIO/VDDANA pin, with a 4.7 uF bulk capacitor near the package. The exposed thermal pad (EP) on the 48-VFQFN package MUST be soldered to a continuous copper pour of at least 25 mm2 to meet thermal specifications and provide a low-impedance ground return. Star-ground the analog (GNDANA) and digital (GND) returns at a single point beneath the IC to minimize ADC noise coupling. Keep SWD traces (PA14/SWDCLK, PA15/SWDIO) under 50 mm total length and avoid routing them adjacent to switching signals.
The ATSAMC20G18A-MNT accepts a single 2.7-5.5V supply across VDDIO and VDDANA. For noise-sensitive applications, separate ferrite beads between VDDIO and VDDANA, with the analog supply additionally filtered by a 10 uH inductor and 10 uF capacitor to reduce ADC reference noise. The internal 1.2V core regulator (VDDCORE, pin 44) requires a 1 uF low-ESR ceramic decoupling capacitor. Estimated: at 48 MHz active mode with all peripherals enabled, typical IDD is approximately 8 mA per the SAM C20 datasheet electrical characteristics table; verify against the latest revision before finalizing the power budget.
Do not assume all SAM C20 package variants share the same pinout: the 32-pin QFN, 48-pin QFN, and 64-pin TQFP variants have different pin multiplexing. When migrating from ATSAMC20G16A-MNT to ATSAMC20G18A-MNT (same package) ensure the linker script matches the larger Flash size and that any hard-coded Flash end-address constants are updated. The 5V-tolerant I/O on the SAM C20 is NOT true 5V compliance for inputs above VDD+0.3V during power-up - sequence the supply ramp to avoid latchup. Always configure unused pins as outputs driven low or as inputs with internal pull-up enabled to minimize shoot-through current.
For the SERCOM modules configured as I2C, use external 4.7 kohm pull-ups on SDA/SCL rather than relying on the internal weak pull-ups (typically 20-50 kohm) which cannot meet the I2C Fast-Mode (400 kHz) rise-time specification. When using the CAN-FD peripheral, place a 120 ohm termination resistor at each end of the bus and use twisted-pair wiring with characteristic impedance of 120 ohms. For the 12-bit ADC, avoid switching signals on adjacent pins during conversion, or use the 16-bit Sigma-Delta ADC with its built-in digital filtering for improved noise immunity.
Estimated: at 48 MHz active mode drawing 8 mA from a 5.0V supply, the SAM C20 dissipates approximately 40 mW. The 48-VFQFN (7x7 mm) package has a typical theta_JA of approximately 38 C/W on a 4-layer JEDEC test board, resulting in a junction temperature rise of only ~1.5 C above ambient - well within the -40C to +105C operating range. At +105C ambient, the IC remains within spec without active cooling. For higher ambient temperatures (industrial cabinets at +85C ambient), the natural thermal margin exceeds 20 C.
Informations de conformité
Green (RoHS compliant) per Microchip product page. Standard variant is NOT AEC-Q100 qualified; choose ATSAMC20G18A-ANT or ATSAMC20G16A-AUT for automotive applications.
