Microchip Technology
ATSAMD20J18A-MN - ARM Cortex-M0+ MCU 256KB Flash | Microchip
MPN: ATSAMD20J18A-MN ✓ Hoạt động
1.62 V to 3.63 V Vdss
64-pin QFN (HVQCCN) Package
48 MHz Speed
256 KB Memory
MOQ: 1 |
ATSAMD20J18A-MN Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20J18A-MN — 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 ATSAMD20J18A-MN (cùng hình factor và footprint) — khác nhau ở 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
So sánh với ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 350 ksps, up to 16 channels
Package: 64-UFBGA (5x5 mm)
SRAM: 4 KB
So sánh với 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
So sánh với 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
So sánh với ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 200 ksps
Package: 64-LQFP (10x10 mm)
Operating Temperature Range: -40 C to +85 C
So sánh với 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
So sánh với ATSAMD20J18A-MN →
Microchip Technology
ADC: 12-bit, up to 350 ksps
Package: 64-pin QFN (9x9 mm) with exposed pad
RoHS Status: Compliant
So sánh với ATSAMD20J18A-MN →
ATSAMD20J18A-MU
✅ Drop-InMicrochip 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
Liên hệ để biết giá
Xem tài liệu →ATSAMD20J18A-AU
✅ Drop-InMicrochip 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
Liên hệ để biết giá
Xem tài liệu →ATSAMD20J17A-MNT
✅ Drop-InMicrochip 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
Liên hệ để biết giá
Xem tài liệu →ATSAMD20J16B-MN
✅ Drop-InMicrochip 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
Liên hệ để biết giá
Xem tài liệu →ATSAMD20J15A-CNT
✅ Drop-InMicrochip 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)
Liên hệ để biết giá
Xem tài liệu →ATSAMC21J18A-MUT64
✅ Drop-InMicrochip 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)
Liên hệ để biết giá
Xem tài liệu →ATSAMD20J18A-MN Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp | 64-pin QFN (HVQCCN) |
| Kiểu lắp đặt | 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 |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant (per Mouser listing) |
Cấu hình chân ATSAMD20J18A-MN
| Chân 1 | VDD — Digital supply voltage input |
| Chân 2 | GND — Ground reference |
| Chân 3 | PA00 — PORT A GPIO 0 / SERCOM1 PAD0 / ADC0 AIN0 |
| Chân 4 | PA01 — PORT A GPIO 1 / SERCOM1 PAD1 / ADC0 AIN1 |
| Chân 5 | PA02 — PORT A GPIO 2 / SERCOM1 PAD2 / ADC0 AIN2 |
| Chân 6 | PA03 — PORT A GPIO 3 / SERCOM1 PAD3 / ADC0 AIN3 |
| Chân 7 | PA04 — PORT A GPIO 4 / SERCOM0 PAD0 / ADC0 AIN4 |
| Chân 8 | PA05 — PORT A GPIO 5 / SERCOM0 PAD1 / ADC0 AIN5 |
| Chân 9 | PA06 — PORT A GPIO 6 / SERCOM0 PAD2 / ADC0 AIN6 |
| Chân 10 | PA07 — PORT A GPIO 7 / SERCOM0 PAD3 / ADC0 AIN7 |
| Chân 11 | PA08 — PORT A GPIO 8 / SERCOM2 PAD0 / ADC0 AIN8 |
| Chân 12 | PA09 — PORT A GPIO 9 / SERCOM2 PAD1 / ADC0 AIN9 |
| Chân 13 | PA10 — PORT A GPIO 10 / SERCOM2 PAD2 / ADC0 AIN10 |
| Chân 14 | PA11 — PORT A GPIO 11 / SERCOM2 PAD3 / ADC0 AIN11 |
| Chân 15 | PA12 — PORT A GPIO 12 / SERCOM3 PAD0 / ADC0 AIN12 |
| Chân 16 | PA13 — PORT A GPIO 13 / SERCOM3 PAD1 / ADC0 AIN13 |
| Chân 17 | PA14 — PORT A GPIO 14 / SERCOM3 PAD2 / ADC0 AIN14 |
| Chân 18 | PA15 — PORT A GPIO 15 / SERCOM3 PAD3 / ADC0 AIN15 |
| Chân 19 | PA16 — PORT A GPIO 16 / SERCOM1 PAD0 / I2S SD0 |
| Chân 20 | PA17 — PORT A GPIO 17 / SERCOM1 PAD1 / I2S MCK0 |
| Chân 21 | PA18 — PORT A GPIO 18 / SERCOM1 PAD2 / I2S FS0 |
| Chân 22 | PA19 — PORT A GPIO 19 / SERCOM1 PAD3 / I2S SCK0 |
| Chân 23 | PA20 — PORT A GPIO 20 / SERCOM5 PAD2 |
| Chân 24 | PA21 — PORT A GPIO 21 / SERCOM5 PAD3 |
| Chân 25 | PA22 — PORT A GPIO 22 / SERCOM3 PAD0 / I2S SD1 |
| Chân 26 | PA23 — PORT A GPIO 23 / SERCOM3 PAD1 / I2S MCK1 |
| Chân 27 | PA24 — PORT A GPIO 24 / SERCOM3 PAD2 / USB D- |
| Chân 28 | PA25 — PORT A GPIO 25 / SERCOM3 PAD3 / USB D+ |
| Chân 29 | RESET — System reset (active low) |
| Chân 30 | PA27 — PORT A GPIO 27 |
| Chân 31 | PA28 — PORT A GPIO 28 |
| Chân 32 | GND — Ground reference |
| Chân 33 | PA30 — PORT A GPIO 30 / SWCLK |
| Chân 34 | PA31 — PORT A GPIO 31 / SWDIO |
| Chân 35 | PB00 — PORT B GPIO 0 / SERCOM4 PAD0 / ADC0 AIN8 alt |
| Chân 36 | PB01 — PORT B GPIO 1 / SERCOM4 PAD1 |
| Chân 37 | PB02 — PORT B GPIO 2 / SERCOM4 PAD2 / ADC0 AIN10 alt |
| Chân 38 | PB03 — PORT B GPIO 3 / SERCOM4 PAD3 |
| Chân 39 | PB04 — PORT B GPIO 4 / SERCOM4 PAD0 alt |
| Chân 40 | PB05 — PORT B GPIO 5 / SERCOM4 PAD1 alt |
| Chân 41 | PB06 — PORT B GPIO 6 / SERCOM4 PAD2 alt |
| Chân 42 | PB07 — PORT B GPIO 7 / SERCOM4 PAD3 alt |
| Chân 43 | PB08 — PORT B GPIO 8 / SERCOM4 PAD0 / I2S MCK1 alt |
| Chân 44 | PB09 — PORT B GPIO 9 / SERCOM4 PAD1 / I2S MCK0 alt |
| Chân 45 | PB10 — PORT B GPIO 10 / SERCOM4 PAD2 / I2S FS0 alt |
| Chân 46 | PB11 — PORT B GPIO 11 / SERCOM4 PAD3 / I2S SCK0 alt |
| Chân 47 | PB12 — PORT B GPIO 12 / SERCOM4 PAD0 alt / DAC0 VOUT |
| Chân 48 | PB13 — PORT B GPIO 13 / SERCOM4 PAD1 alt |
| Chân 49 | PB14 — PORT B GPIO 14 / SERCOM4 PAD2 alt |
| Chân 50 | PB15 — PORT B GPIO 15 / SERCOM4 PAD3 alt |
| Chân 51 | PB17 — PORT B GPIO 17 |
| Chân 52 | PB18 — PORT B GPIO 18 |
| Chân 53 | PB19 — PORT B GPIO 19 |
| Chân 54 | PB20 — PORT B GPIO 20 |
| Chân 55 | PB21 — PORT B GPIO 21 |
| Chân 56 | PB22 — PORT B GPIO 22 |
| Chân 57 | PB23 — PORT B GPIO 23 |
| Chân 58 | VDD — Digital supply voltage input |
| Chân 59 | GND — Ground reference |
| Chân 60 | VDDIO — I/O supply voltage reference |
| Chân 61 | VDDANA — Analog supply voltage reference |
| Chân 62 | GND — Ground reference |
| Chân 63 | PA06 — PORT A GPIO 6 alternate mapping |
| Chân 64 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
ATSAMD20J18A-MN phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
ATSAMR34
Sub-GHz wireless MCU for mesh home automation Được sử dụng trong: Home Automation Sensor Hub
RN4870
Bluetooth 5.0 module for hub-to-cloud link Được sử dụng trong: Home Automation Sensor Hub
MCP3911
Analog front-end for energy metering ADC Được sử dụng trong: Smart Metering Endpoints
ATECC608B
Cryptographic authentication for anti-fraud Được sử dụng trong: Smart Metering Endpoints
MAX30102
PPG heart-rate and SpO2 sensor Được sử dụng trong: Wearable Fitness Devices
LIS2DH
3-axis accelerometer for step counting Được sử dụng trong: Wearable Fitness Devices
MAX22531
IO-Link transceiver Được sử dụng trong: Industrial Sensor Transmitters
ADM3251E
Isolated RS-485 transceiver Được sử dụng trong: Industrial Sensor Transmitters
RN2483
LoRa transceiver for long-range IoT Được sử dụng trong: IoT Edge Connectivity Nodes
BG95-M3
LTE-M/NB-IoT modem Được sử dụng trong: IoT Edge Connectivity Nodes
DRV8870
Brushed DC motor driver Được sử dụng trong: Consumer Appliance Control Boards
TLP281
Optocoupler for mains isolation Được sử dụng trong: 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.
Dữ liệu tham khảo kỹ thuật cho ATSAMD20J18A-MN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
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.
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Largest Flash + SRAM in SAM D20J QFN package (vsATSAMD20J15A-CNT)
- Identical silicon footprint for layout reuse (vsATSAMD20J18A-AU)
- Cortex-M0+ with full SAM D20 peripheral set vs SAM C21 CAN-FD upgrade (vsATSAMC21J18A-MUT64)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
Không chì
Yes
Không halogen
Unknown
Khoáng vật xung đột
Compliant
RoHS compliant per Mouser listing. Not AEC-Q100 qualified; choose ATSAMD20J18A-MU-Y or SAM D21 automotive variants for vehicle applications.
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ARM Cortex-M0+
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QFN-64
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