Microchip Technology ATSAMD21J18A-MFT

Mfr. Part

ATSAMD21J18A-MFT

Manufacturer

Micrel / Microchip Technology

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Detailed Description

32-bit ARM Cortex-M0+ microcontroller, 48 MHz, 256 KB Flash, 32 KB SRAM, 64-pin QFN with exposed pad, automotive AEC-Q100 qualified, wide temperature range. Ideal for low-power embedded control with rich connectivity and analog integration.

Key Features

Core and speed ARM Cortex-M0+ single core at up to 48 MHz

Memory 256 KB Flash, 32 KB SRAM

I/O 52 configurable GPIOs

Connectivity I2C, LINbus, SPI, UART/USART, USB device

Analog 20-channel 12-bit ADC, 1-channel 10-bit DAC

Peripherals brown-out detect/reset, DMA, interrupt system, power-on reset, PWM, watchdog timer

Clock internal oscillator options for low-power operation

Supply voltage 1.62 V to 3.6 V

Temperature range -40°C to +125°C

Package 64-QFN (9 x 9 mm) with exposed thermal pad

Compliance RoHS3 compliant

Series SAM D21J, Automotive, AEC-Q100, Functional Safety (FuSa)

Availability Tape & Reel packaging, 3100 units currently listed

Key Advantages

Low power consumption with multiple sleep modes and dynamic power management

Rich set of serial interfaces and USB for easy system connectivity

Integrated analog and timers reduce external components and BOM cost

Automotive qualification and wide temperature range for harsh environments

Compact 64-QFN with exposed pad improves thermal and EMI performance

Mature SAM D21 ecosystem with proven tools, libraries, and community support

Packaging

Type Tape & Reel TR for automated SMT assembly

Package 64-QFN body approximately 9 x 9 mm with exposed thermal pad

Material molded epoxy package, copper leadframe, matte-tin plated leads

Mounting surface-mount, reflow solder compatible

Pin configuration 64 pins total with 52 GPIOs plus power, USB D+/D-, oscillator, and reference pins

Thermal characteristics exposed center pad for efficient heat transfer to PCB; follow datasheet land pattern and thermal via recommendations

Electrical properties 1.62 V to 3.6 V operation, internal oscillator options, integrated brown-out and watchdog for robust power management

Lifecycle

Status Active and in mass production; not nearing discontinuation based on current industry status

Direct equivalents within same family and different packages

- ATSAMD21J18A-MU 64-pin QFN variant of the same device

- ATSAMD21J18A-AU 64-pin TQFP variant of the same device

Capacity variants same pinout, different Flash sizes

- ATSAMD21J17A 128 KB Flash, 32 KB SRAM

- ATSAMD21J16A 64 KB Flash, 32 KB SRAM

Pin-count variants same architecture, fewer pins

- ATSAMD21G18A 48-pin package option

- ATSAMD21E18A 32-pin package option

Application-driven alternatives if you need CAN or more robust automotive features

- SAMC21 family Cortex-M0+ with CAN-FD, automotive grade

If you need other drop-in or functionally equivalent options, contact our sales team via the Y-IC website for the latest cross-reference and availability.

Key Application Areas

Automotive modules and LIN nodes, sensor interfaces, body electronics

Industrial IoT endpoints, smart sensors, data loggers

USB device peripherals, HID, and simple USB bridges

Low-power embedded controls, wearables, and battery-powered products

Home and building automation, HMI, keypads, and smart appliances

Education and prototyping platforms using SAM D21 ecosystem

Datasheet

Y-IC hosts the most authoritative datasheet for this product on our website. We recommend customers download the datasheet from the current product page for complete specifications, pinouts, electrical characteristics, and design guidelines.

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