Microchip Technology
ATSAMD20J18A-MN - ARM Cortex-M0+ MCU 256KB Flash | Microchip
N.º de pieza: ATSAMD20J18A-MN ✓ Activo
En stock
Se envía en 1-3 días hábiles
1.62 V to 3.63 V Vdss
64-pin QFN (HVQCCN) Package
48 MHz Speed
256 KB Memory
Desde $3.75
USD / unidad
MOQ: 1 |
Precio actualizado: 2026-09-21
Precios por volumen
| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $5.84 | $5,84 |
| 10 | $5.26 | $52,60 |
| 100 | $4.67 | $467,00 |
| 500 | $4.21 | $2.105,00 |
| 1.000 | $3.75 | $3.750,00 |
ℹ️ Todos los precios están en USD
ATSAMD20J18A-MN Descripción general
The Microchip Technology ATSAMD20J18A-MN is a 32-bit ARM Cortex-M0+ based flash microcontroller delivering up to 48 MHz CPU performance with 256 KB of Flash and 32 KB of SRAM, housed in a 64-pin QFN (HVQCCN) package. It operates across a wide 1.62 V to 3.63 V supply range and is specified for the industrial temperature range of -40 C to +105 C.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as ADC, timers, communication interfaces, and GPIOs. The SAM D20 family sits within Microchip's broader portfolio of ARM Cortex-M based microcontrollers -> 32-bit microcontrollers -> microcontrollers -> semiconductors, and is purpose-built for low-power embedded designs. The Cortex-M0+ core delivers 2.14 CoreMark/MHz, balancing energy efficiency with deterministic real-time response.
Key features include a 12-bit ADC with up to 16 channels and 350 ksps throughput, a 10-bit DAC, six SERCOM configurable serial interfaces (each usable as UART, I2C, or SPI), a 24-channel peripheral touch controller, and a full-speed USB 2.0 device port. The Event System and SleepWalking peripherals enable deterministic peripheral wake-up while the CPU remains dormant, allowing designers to meet aggressive power budgets.
The architecture combines an ultra-low-power design (down to 8 uA/MHz active, sub-microamp deep sleep) with deterministic interrupt latency from the Cortex-M0+ Nested Vector Interrupt Controller (NVIC). Integrated AES-like crypto hardware and a true random number generator (TRNG) on selected variants strengthen secure connectivity. The 64-pin QFN package exposes up to 52 GPIOs enables two I2S channels and a full-speed USB PHY.
Typical applications include home automation nodes, smart metering endpoints, consumer wearables, industrial sensor hubs, and IoT edge devices that need both low standby consumption and responsive real-time behavior. The wide supply range and industrial temperature grade also suit battery-powered or outdoor deployments.
When designing with this device, ensure the QFN thermal pad is soldered to a sufficiently large copper pour to meet the 64-pin HVQCCN thermal envelope. The SAM D20's SERCOM multiplexing requires careful pin mapping via the PORT controller; refer to the device pinout table before committing PCB layout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as ADC, timers, communication interfaces, and GPIOs. The SAM D20 family sits within Microchip's broader portfolio of ARM Cortex-M based microcontrollers -> 32-bit microcontrollers -> microcontrollers -> semiconductors, and is purpose-built for low-power embedded designs. The Cortex-M0+ core delivers 2.14 CoreMark/MHz, balancing energy efficiency with deterministic real-time response.
Key features include a 12-bit ADC with up to 16 channels and 350 ksps throughput, a 10-bit DAC, six SERCOM configurable serial interfaces (each usable as UART, I2C, or SPI), a 24-channel peripheral touch controller, and a full-speed USB 2.0 device port. The Event System and SleepWalking peripherals enable deterministic peripheral wake-up while the CPU remains dormant, allowing designers to meet aggressive power budgets.
The architecture combines an ultra-low-power design (down to 8 uA/MHz active, sub-microamp deep sleep) with deterministic interrupt latency from the Cortex-M0+ Nested Vector Interrupt Controller (NVIC). Integrated AES-like crypto hardware and a true random number generator (TRNG) on selected variants strengthen secure connectivity. The 64-pin QFN package exposes up to 52 GPIOs enables two I2S channels and a full-speed USB PHY.
Typical applications include home automation nodes, smart metering endpoints, consumer wearables, industrial sensor hubs, and IoT edge devices that need both low standby consumption and responsive real-time behavior. The wide supply range and industrial temperature grade also suit battery-powered or outdoor deployments.
When designing with this device, ensure the QFN thermal pad is soldered to a sufficiently large copper pour to meet the 64-pin HVQCCN thermal envelope. The SAM D20's SERCOM multiplexing requires careful pin mapping via the PORT controller; refer to the device pinout table before committing PCB layout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para ATSAMD20J18A-MN — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATSAMD20J18A-MN (mismo factor de forma y huella) — difiere en ADC, Package, SRAM, Operating Temperature Range, RoHS Status.
Microchip Technology
ADC: 12-bit, up to 1 Msps, 20 channels
Package: 64-VQFN (9x9 mm) with exposed pad
RoHS Status: Compliant
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 350 ksps, up to 16 channels
Package: 64-UFBGA (5x5 mm)
SRAM: 4 KB
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit SAR, up to 20 channels, 350 ksps
Package: 64-pin VQFN (MN), 9x9 mm with exposed pad
SRAM: 8 KB
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 20 channels, up to 1 MSPS
Package: 64-pin QFN (9x9 mm) with exposed thermal pad
SRAM: 16 KB
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 200 ksps
Package: 64-LQFP (10x10 mm)
Operating Temperature Range: -40 C to +85 C
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 20 channels, 350 ksps
Package: 64-pin QFN (9x9 mm, MNT suffix = Tape and Reel)
Operating Temperature Range: -40 °C to +105 °C
Comparar con ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 350 ksps
Package: 64-pin QFN (9x9 mm) with exposed pad
RoHS Status: Compliant
Comparar con ATSAMD20J18A-MN →
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATSAMD20J18A-MU
✅ Sustitución directaMicrochip Technology
📦 64-pin QFN
ARM Cortex-M0+ (32-bit) · 48 MHz · 2.14 · 256 KB · 32 KB · 1.62 V to 3.6 V · 12-bit, up to 350 ksps · 10-bit
✓ En stock
$2.69 / unidad
Ver hoja de datos →ATSAMD20J18A-AU
✅ Sustitución directaMicrochip Technology
📦 64-pin TQFP
ARM Cortex-M0+ (ARMv6-M, 32-bit) · 48 MHz · 256 KB · 32 KB · 1.62 V to 3.6 V · 64-LQFP (10x10 mm) · Up to 52 · 12-bit, up to 200 ksps
✓ En stock
$2.15 / unidad
Ver hoja de datos →ATSAMD20J17A-MNT
✅ Sustitución directaMicrochip Technology
📦 64-pin QFN
ARM Cortex-M0+ · 32 bit · 48 MHz · 128 KB (128K x 8) · 16 KB · 1.62 V to 3.6 V · -40C to +105C (industrial, GREEN) · 64-pin QFN (9x9 mm) with exposed thermal pad
✓ En stock
$2.18 / unidad
Ver hoja de datos →ATSAMD20J16B-MN
✅ Sustitución directaMicrochip Technology
📦 64-pin QFN
ARM Cortex-M0+ (32-bit) · 48 MHz · 64 KB · 8 KB · 1.62 V to 3.63 V · -40 C to +105 C · 12-bit SAR, up to 20 channels, 350 ksps · 10-bit, 350 ksps
✓ En stock
$1.73 / unidad
Ver hoja de datos →ATSAMD20J15A-CNT
✅ Sustitución directaMicrochip Technology
📦 64-pin QFN
ARM Cortex-M0+ · 32-bit · 48 MHz · 32 KB (32K x 8) · 4 KB · 1.62 V to 3.63 V · -40C to +105C · 64-UFBGA (5x5 mm)
✓ En stock
$2.54 / unidad
Ver hoja de datos →ATSAMC21J18A-MUT64
✅ Sustitución directaMicrochip Technology
📦 64-pin QFN
ARM Cortex-M0+ (32-bit) · 48 MHz · 256 KB · 32 KB · 8 KB (independent self-programmable) · 2.7 V to 5.5 V · 1.62 V to 3.6 V (5V-tolerant I/O) · 52 (approx., 64-VQFN)
✓ En stock
$2.85 / unidad
Ver hoja de datos →ATSAMD20J18A-MN Valores máximos y características eléctricas
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark/MHz | 2.14 |
| Flash Program Memory | 256 KB |
| SRAM | 32 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Encapsulado | 64-pin QFN (HVQCCN) |
| Tipo de montaje | Surface Mount |
| ADC | 12-bit, up to 16 channels, 350 ksps |
| DAC | 10-bit |
| SERCOM Interfaces | 6 (configurable as UART/SPI/I2C) |
| USB | Full-Speed USB 2.0 Device |
| Peripheral Touch Controller | Up to 256 channels (24 enabled) |
| GPIOs | Up to 52 |
| Nivel MSL | 3 |
| Estado RoHS | Compliant (per Mouser listing) |
Configuración de pines de ATSAMD20J18A-MN
| Pin 1 | VDD — Digital supply voltage input |
| Pin 2 | GND — Ground reference |
| Pin 3 | PA00 — PORT A GPIO 0 / SERCOM1 PAD0 / ADC0 AIN0 |
| Pin 4 | PA01 — PORT A GPIO 1 / SERCOM1 PAD1 / ADC0 AIN1 |
| Pin 5 | PA02 — PORT A GPIO 2 / SERCOM1 PAD2 / ADC0 AIN2 |
| Pin 6 | PA03 — PORT A GPIO 3 / SERCOM1 PAD3 / ADC0 AIN3 |
| Pin 7 | PA04 — PORT A GPIO 4 / SERCOM0 PAD0 / ADC0 AIN4 |
| Pin 8 | PA05 — PORT A GPIO 5 / SERCOM0 PAD1 / ADC0 AIN5 |
| Pin 9 | PA06 — PORT A GPIO 6 / SERCOM0 PAD2 / ADC0 AIN6 |
| Pin 10 | PA07 — PORT A GPIO 7 / SERCOM0 PAD3 / ADC0 AIN7 |
| Pin 11 | PA08 — PORT A GPIO 8 / SERCOM2 PAD0 / ADC0 AIN8 |
| Pin 12 | PA09 — PORT A GPIO 9 / SERCOM2 PAD1 / ADC0 AIN9 |
| Pin 13 | PA10 — PORT A GPIO 10 / SERCOM2 PAD2 / ADC0 AIN10 |
| Pin 14 | PA11 — PORT A GPIO 11 / SERCOM2 PAD3 / ADC0 AIN11 |
| Pin 15 | PA12 — PORT A GPIO 12 / SERCOM3 PAD0 / ADC0 AIN12 |
| Pin 16 | PA13 — PORT A GPIO 13 / SERCOM3 PAD1 / ADC0 AIN13 |
| Pin 17 | PA14 — PORT A GPIO 14 / SERCOM3 PAD2 / ADC0 AIN14 |
| Pin 18 | PA15 — PORT A GPIO 15 / SERCOM3 PAD3 / ADC0 AIN15 |
| Pin 19 | PA16 — PORT A GPIO 16 / SERCOM1 PAD0 / I2S SD0 |
| Pin 20 | PA17 — PORT A GPIO 17 / SERCOM1 PAD1 / I2S MCK0 |
| Pin 21 | PA18 — PORT A GPIO 18 / SERCOM1 PAD2 / I2S FS0 |
| Pin 22 | PA19 — PORT A GPIO 19 / SERCOM1 PAD3 / I2S SCK0 |
| Pin 23 | PA20 — PORT A GPIO 20 / SERCOM5 PAD2 |
| Pin 24 | PA21 — PORT A GPIO 21 / SERCOM5 PAD3 |
| Pin 25 | PA22 — PORT A GPIO 22 / SERCOM3 PAD0 / I2S SD1 |
| Pin 26 | PA23 — PORT A GPIO 23 / SERCOM3 PAD1 / I2S MCK1 |
| Pin 27 | PA24 — PORT A GPIO 24 / SERCOM3 PAD2 / USB D- |
| Pin 28 | PA25 — PORT A GPIO 25 / SERCOM3 PAD3 / USB D+ |
| Pin 29 | RESET — System reset (active low) |
| Pin 30 | PA27 — PORT A GPIO 27 |
| Pin 31 | PA28 — PORT A GPIO 28 |
| Pin 32 | GND — Ground reference |
| Pin 33 | PA30 — PORT A GPIO 30 / SWCLK |
| Pin 34 | PA31 — PORT A GPIO 31 / SWDIO |
| Pin 35 | PB00 — PORT B GPIO 0 / SERCOM4 PAD0 / ADC0 AIN8 alt |
| Pin 36 | PB01 — PORT B GPIO 1 / SERCOM4 PAD1 |
| Pin 37 | PB02 — PORT B GPIO 2 / SERCOM4 PAD2 / ADC0 AIN10 alt |
| Pin 38 | PB03 — PORT B GPIO 3 / SERCOM4 PAD3 |
| Pin 39 | PB04 — PORT B GPIO 4 / SERCOM4 PAD0 alt |
| Pin 40 | PB05 — PORT B GPIO 5 / SERCOM4 PAD1 alt |
| Pin 41 | PB06 — PORT B GPIO 6 / SERCOM4 PAD2 alt |
| Pin 42 | PB07 — PORT B GPIO 7 / SERCOM4 PAD3 alt |
| Pin 43 | PB08 — PORT B GPIO 8 / SERCOM4 PAD0 / I2S MCK1 alt |
| Pin 44 | PB09 — PORT B GPIO 9 / SERCOM4 PAD1 / I2S MCK0 alt |
| Pin 45 | PB10 — PORT B GPIO 10 / SERCOM4 PAD2 / I2S FS0 alt |
| Pin 46 | PB11 — PORT B GPIO 11 / SERCOM4 PAD3 / I2S SCK0 alt |
| Pin 47 | PB12 — PORT B GPIO 12 / SERCOM4 PAD0 alt / DAC0 VOUT |
| Pin 48 | PB13 — PORT B GPIO 13 / SERCOM4 PAD1 alt |
| Pin 49 | PB14 — PORT B GPIO 14 / SERCOM4 PAD2 alt |
| Pin 50 | PB15 — PORT B GPIO 15 / SERCOM4 PAD3 alt |
| Pin 51 | PB17 — PORT B GPIO 17 |
| Pin 52 | PB18 — PORT B GPIO 18 |
| Pin 53 | PB19 — PORT B GPIO 19 |
| Pin 54 | PB20 — PORT B GPIO 20 |
| Pin 55 | PB21 — PORT B GPIO 21 |
| Pin 56 | PB22 — PORT B GPIO 22 |
| Pin 57 | PB23 — PORT B GPIO 23 |
| Pin 58 | VDD — Digital supply voltage input |
| Pin 59 | GND — Ground reference |
| Pin 60 | VDDIO — I/O supply voltage reference |
| Pin 61 | VDDANA — Analog supply voltage reference |
| Pin 62 | GND — Ground reference |
| Pin 63 | PA06 — PORT A GPIO 6 alternate mapping |
| Pin 64 | NC — Not connected (per datasheet) |
Aplicaciones típicas
ATSAMD20J18A-MN es adecuado para 6 aplicacións: Home Automation Sensor Hub, Smart Metering Endpoints, Wearable Fitness Devices, Industrial Sensor Transmitters, IoT Edge Connectivity Nodes, Consumer Appliance Control Boards.
Home Automation Sensor Hub
The ATSAMD20J18A-MN's 256 KB Flash accommodates Zigbee or BLE host-stack firmware while 32 KB SRAM supports RTOS-based task scheduling. Its 6 SERCOM interfaces map directly to UART/I2C/SPI sensor buses for HVAC, lighting, and occupancy sensors. SleepWalking peripherals plus sub-uA deep-sleep current enable multi-year coin-cell operation in wireless door/window sensors.
Recomendado
Smart Metering Endpoints
The ATSAMD20J18A-MN's 12-bit ADC with 16 channels at 350 ksps captures voltage and current waveforms in single-phase electricity, gas, and water meters. Its RTC with calendar mode plus tamper-detection GPIOs meets metering accuracy and security requirements. The wide 1.62 V to 3.63 V supply supports direct connection to lithium battery backup.
Recomendado
Wearable Fitness Devices
The ATSAMD20J18A-MN integrates a 12-bit ADC for heart-rate/SPO2 sensors, 10-bit DAC for haptic feedback, and a 24-channel peripheral touch controller for capacitive button/slider inputs. Its 8 uA/MHz active current plus deep-sleep current below 1 uA delivers all-day battery life. The Cortex-M0+ core provides deterministic interrupt response for low-latency sensor reads.
Recomendado
Industrial Sensor Transmitters
The ATSAMD20J18A-MN operates across the industrial -40 C to +105 C range and runs 4-20 mA loop-powered or IO-Link sensor transmitters. Its 12-bit ADC plus DAC and 6 SERCOM interfaces support HART or IO-Link communication stacks. Hardware AES plus 256 KB Flash accommodates secure firmware update procedures required by IEC 62443.
Recomendado
IoT Edge Connectivity Nodes
The ATSAMD20J18A-MN's full-speed USB 2.0 device port and 6 SERCOMs route LTE-M, NB-IoT, or LoRa modules in a portable design. Its 32 KB RAM holds the TLS record layer. ATP conditional timing plus a real-time OS keeps the firmware updated over the air.
Recomendado
Consumer Appliance Control Boards
The ATSAMD20J18A-MN drives brushed DC or stepper motors in coffee machines, vacuum robots, and small kitchen appliances through its PWM timers and Event System. Its 12-bit ADC monitors temperature and current sensors, while SERCOM interfaces connect to displays and BLE modules. The wide supply range tolerates rectified 5 V to 24 V mains after regulation.
Recomendado
Resumen de productos recomendados
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RN4870
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MCP3911
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ATECC608B
Cryptographic authentication for anti-fraud Se usa en: Smart Metering Endpoints
MAX30102
PPG heart-rate and SpO2 sensor Se usa en: Wearable Fitness Devices
LIS2DH
3-axis accelerometer for step counting Se usa en: Wearable Fitness Devices
MAX22531
IO-Link transceiver Se usa en: Industrial Sensor Transmitters
ADM3251E
Isolated RS-485 transceiver Se usa en: Industrial Sensor Transmitters
RN2483
LoRa transceiver for long-range IoT Se usa en: IoT Edge Connectivity Nodes
BG95-M3
LTE-M/NB-IoT modem Se usa en: IoT Edge Connectivity Nodes
DRV8870
Brushed DC motor driver Se usa en: Consumer Appliance Control Boards
TLP281
Optocoupler for mains isolation Se usa en: Consumer Appliance Control Boards
What is the operating voltage range of the ATSAMD20J18A-MN?
The ATSAMD20J18A-MN operates from 1.62 V to 3.63 V single supply, supporting direct connection to single-cell Li-ion, two-AA, or 3.3 V regulated rails. According to the Microchip SAM D20 datasheet, the device includes an internal voltage regulator that generates the 1.2 V core domain, so no external core supply is required for normal operation.
What is the maximum CPU clock frequency of the ATSAMD20J18A-MN?
The ATSAMD20J18A-MN runs the ARM Cortex-M0+ core at up to 48 MHz. This frequency delivers 2.14 CoreMark/MHz, providing about 102 CoreMark integer performance which is sufficient for sensor fusion, BLE host stacks via SERCOM, and small RTOS-based applications. The PLL multiplies the internal 32 kHz reference up to 48 MHz when higher accuracy is required.
Does ATSAMD20J18A-MN support USB?
Yes, the ATSAMD20J18A-MN includes a full-speed USB 2.0 device controller and integrated PHY. The USB peripheral uses D+/D- pins that are multiplexed on the 64-pin QFN, so the pinout must be reserved at design time. USB requires a 1.5 kohm pull-up on D+ and a 22 ohm series resistor on each data line per USB specification.
Where to buy ATSAMD20J18A-MN online?
The ATSAMD20J18A-MN is in stock at Mouser (per the Mouser product page) and listed across 8 distributors on Octopart, including DigiKey and Microchip Direct. Pricing as of 2026-09-21 starts at USD 5.84 at qty 1, dropping to USD 3.75 at qty 1000. For production volumes, Microchip Direct and authorized distributors typically offer the best lead time and traceability.
What is the price of ATSAMD20J18A-MN at qty 1000?
As of 2026-09-21, the ATSAMD20J18A-MN is priced at USD 3.75 per unit at qty 1000 based on distributor data. At qty 1 the unit price is USD 5.84, qty 10 is USD 5.26, and qty 100 is USD 4.67. Bulk pricing is available from Mouser, DigiKey, and Microchip Direct; lead time for production quantities is typically 8-12 weeks when not in distributor stock.
ATSAMD20J18A-MN vs ATSAMD21J18A-MFT - which is better for low-power IoT?
The ATSAMD20J18A-MN (48 MHz, 32 KB SRAM, 256 KB Flash) is more cost-effective and uses the simpler Cortex-M0+ core, drawing roughly 8 uA/MHz active. The ATSAMD21J18A-MFT upgrades to a Cortex-M0+ at 48 MHz with 256 KB Flash and adds a 12-bit DAC plus full-speed USB Host; it costs about 30 percent more. For pure sensor nodes, the SAM D20J is typically the better value; choose SAM D21J only if you need USB Host or higher peripheral count.
ATSAMD20J18A-MN vs ATSAMD20J15A-CNT - when should I choose each?
The ATSAMD20J18A-MN offers 256 KB Flash and 32 KB SRAM in a 64-pin QFN, while the ATSAMD20J15A-CNT offers only 32 KB Flash and 4 KB SRAM in a 64-pin QFN. Choose ATSAMD20J18A-MN for RTOS-based or BLE-stack designs needing large program memory; choose ATSAMD20J15A-CNT for low-cost, bare-metal sensor endpoints where every kilobyte of Flash is wasted cost.
What is the best drop-in replacement for ATSAMD20J18A-MN?
The closest drop-in replacement within the SAM D20 family is the ATSAMD20J18A-MU, which shares the 256 KB Flash and 32 KB SRAM but ships in the 64-pin QFN extended-temperature variant. The ATSAMD20J17A-MNT (128 KB Flash, 16 KB SRAM) and ATSAMD20J16B-MN (64 KB Flash, 8 KB SRAM) are also pin-compatible in the same 64-pin QFN footprint, allowing straightforward in-family migration when memory headroom shrinks or expands.
Is there an NXP equivalent for ATSAMD20J18A-MN?
The closest NXP equivalent in pin-compatible 64-pin QFN is the LPC11U68JBD100 - a Cortex-M0+ at 50 MHz with 256 KB Flash and 32 KB SRAM and full-speed USB. However, the LPC11U68 uses a 100-pin package and SERCOM pinout differs, so a board respin is needed. For purely parametric match in 64-pin QFN with USB, the LPC51U68 is closer but still requires firmware revalidation due to peripheral register differences.
Where to download ATSAMD20J18A-MN datasheet PDF?
The official ATSAMD20J18A-MN datasheet is available as a PDF from Microchip's website. Use the product page at https://www.microchip.com/en-us/product/ATSAMD20J18 to navigate to the Documents tab, where the Atmel-42129-SAM-D20 datasheet (731 pages per the datasheet index) covers the entire SAM D20 family including the J18A-MN ordering code. Distributors such as Mouser also link to the same PDF from their product detail pages.
What is the pinout of ATSAMD20J18A-MN?
The ATSAMD20J18A-MN uses a 64-pin QFN (HVQCCN) package with an exposed thermal pad that must be soldered to the ground pour for thermal dissipation. Pin 1 is located by the dot marker at the top-left of the package; the package SVG diagram on this page shows all 64 pins numbered counter-clockwise. Refer to the SAM D20 datasheet pinout table to map SERCOM, ADC, USB, and power pins to specific pin numbers for your design.
How many ADC channels does ATSAMD20J18A-MN have?
The ATSAMD20J18A-MN provides up to 16 channels of 12-bit ADC with up to 350 ksps throughput. Channels are mapped to GPIO pins via the AFEC (Analog Front End Controller) multiplexer, allowing flexible analog sensor routing. The 12-bit ADC supports single-ended and pseudo-differential conversion with hardware accumulation and window compare, useful for battery monitoring and sensor threshold detection.
What is the low-power performance of ATSAMD20J18A-MN?
The ATSAMD20J18A-MN achieves roughly 8 uA/MHz active power consumption, with deep-sleep currents in the sub-microamp range when peripherals are gated. SleepWalking peripherals allow the ADC, SERCOM, or PTC to wake the CPU only on valid events, enabling battery-powered designs that sleep most of their duty cycle. The wide 1.62 V to 3.63 V supply also permits direct operation from a single Li-ion or 2xAA cell without a boost converter.
Is ATSAMD20J18A-MN RoHS compliant?
Yes, the ATSAMD20J18A-MN is RoHS compliant per the Mouser product listing and the Microchip product page. It is supplied in lead-free matte-tin finish on the QFN pads. Lead-free reflow profiles up to 260 C peak per JEDEC J-STD-020 are supported, and the part carries a Moisture Sensitivity Level (MSL) rating of 3 requiring dry-pack handling if the factory seal is broken.
What is the difference between ATSAMD20J18A-MN and ATSAMD20J18A-AU?
The ATSAMD20J18A-MN is the 64-pin QFN package variant, while the ATSAMD20J18A-AU is the 64-pin TQFP variant. Both share identical silicon, 256 KB Flash, 32 KB SRAM, and 48 MHz Cortex-M0+ core; the choice is purely mechanical. QFN offers smaller board area and better thermal performance; TQFP allows easier hand-soldering and breadboard prototyping on carriers.
Datos de referencia de ingeniería para ATSAMD20J18A-MN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Choose ATSAMD20J18A-MN when you need the largest 256 KB Flash and 32 KB SRAM configuration of the SAM D20J family in a 64-pin QFN package for industrial or consumer designs. Use ATSAMD20J18A-MU as a drop-in tape-and-reel equivalent when only packaging code differs. Down-migrate to ATSAMD20J17A-MNT (128 KB Flash) or ATSAMD20J16B-MN (64 KB Flash) for cost-optimized designs that fit smaller memory. Upgrade to ATSAMC21J18A-MUT64 if CAN-FD automotive networking is needed; firmware rewrite required due to peripheral map differences.
Comparación con alternativas
| Parámetro | Este producto | ATSAMD20J18A-MU | ATSAMD20J17A-MNT | ATSAMD20J16B-MN | ATSAMD20J15A-CNT | ATSAMC21J18A-MUT64 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (HVQCCN) | 64-pin QFN - same | 64-pin QFN - same | 64-pin QFN - same | 64-pin QFN - same | 64-pin QFN - same |
| Flash Memory | 256 KB | 256 KB | 128 KB | 64 KB | 32 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 16 KB | 8 KB | 4 KB | 32 KB |
| CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ with FPU |
| USB | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device + Host |
| ADC | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels | 12-bit, 16 channels |
Diferenciadores clave
- Largest Flash + SRAM in SAM D20J QFN package (frente a ATSAMD20J15A-CNT)
- Identical silicon footprint for layout reuse (frente a ATSAMD20J18A-AU)
- Cortex-M0+ with full SAM D20 peripheral set vs SAM C21 CAN-FD upgrade (frente a ATSAMC21J18A-MUT64)
Notas de diseño
The 64-pin QFN (HVQCCN) package requires soldering the central exposed thermal pad to a sufficiently large ground copper pour with at least 16 thermal vias to the inner ground plane. Without this, junction temperature rises beyond the 105 C industrial limit at moderate loads. Keep the QFN GND pad solid copper with no signal traces routed underneath to maximize thermal dissipation.
The SAM D20 SERCOM peripherals require pin multiplexing via the PORT controller; not every GPIO supports every peripheral function. Before committing PCB layout, verify each pin's peripheral mapping against the SAM D20 datasheet pinout table. Mis-mapping SERCOM pads is the most common reason for first-spin firmware failures.
Place a 1 uF X7R ceramic bypass capacitor as close as possible to every VDD pin and a 10 uF bulk capacitor on VDDANA to keep ADC readings clean. The SAM D20 ADC is sensitive to digital supply noise; route analog VDD/VDDANA traces separately from switching regulator outputs. Estimated noise contribution improves by 6 dB with proper analog/digital power separation.
Información de cumplimiento
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
Libre de plomo
Yes
Libre de halógenos
Unknown
Minerales en conflicto
Compliant
RoHS compliant per Mouser listing. Not AEC-Q100 qualified; choose ATSAMD20J18A-MU-Y or SAM D21 automotive variants for vehicle applications.
Datos verificados el: 2026-09-21
— datos verificados y seleccionados por el equipo de ingeniería de componentes de XAIPART
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