company blog about Supplying Microchip ATSAMC21J18A-AZ—256KB Flash 5V 32-bit ARM Cortex-M0+ MCU

Shenzhen Mingjiada Electronics Co., Ltd., a professional supplier of electronic components, now offers brand-new, genuine Microchip Technology ATSAMC21J18A-AZ high-performance 32-bit microcontrollers.

ATSAMC21J18A-AZ Product Overview

The ATSAMC21J18A-AZ is an automotive-grade 32-bit ARM Cortex-M0+ microcontroller from Microchip Technology’s SAM C21 series. It features a 64-pin TQFP package (10mm × 10mm), operates at a maximum clock speed of 48MHz, and includes 256KB of embedded Flash and 32KB of SRAM. It supports a wide operating voltage range from 2.7V to 5.5V. This product is AEC-Q100 certified and operates reliably within a wide temperature range of -40°C to 125°C. It is specifically designed for automotive electronics, industrial control, and commercial applications that demand stringent reliability and durability.

The SAM C series is Microchip’s 5V Cortex-M0+ device family optimized for industrial automation and applications in noisy environments, featuring powerful communication peripherals (including SERCOM modules and CAN-FD), motor control peripherals, and touch control peripherals for developing robust user interfaces. The ATSAMC21J18A-AZ is pin-compatible with the SAM D family of microcontrollers, providing engineers with flexible hardware upgrade and product iteration paths.

ATSAMC21J18A-AZ Key Features

1. High-Performance ARM Cortex-M0+ Core

The ATSAMC21J18A-AZ features a 32-bit ARM Cortex-M0+ CPU operating at up to 48 MHz, with an integrated single-cycle hardware multiplier, Micro Trace Buffer, and Memory Protection Unit (MPU), balancing real-time control with system security requirements. The device achieves a performance metric of 2.46 CoreMark/MHz.

2. Large-Capacity Memory Resources

Program Flash: 256KB system-programmable Flash

EEPROM Emulation: 4KB independent programmable Flash, enabling data storage without the need for an external EEPROM

SRAM Main Memory: 32KB, meeting the memory requirements of complex embedded applications

3. 5V Operating Voltage and Wide Temperature Range

The ATSAMC21J18A-AZ supports a wide supply voltage range of 2.7V to 5.5V. Its 5V operating voltage provides excellent noise immunity and robustness in noisy industrial environments. With an operating temperature range of -40°C to 125°C and AEC-Q100 automotive-grade certification, it is suitable for mission-critical applications in harsh environments.

4. Robust Communication Interfaces

The device integrates up to six flexible serial communication modules (SERCOMs), which can be flexibly configured as USART, I2C, SPI, and LIN interfaces. It also supports the CAN-FD communication protocol (compliant with ISO 11898-2 and CAN FD Specification V1.0), with a maximum data transfer rate of 10 Mb/s, making it suitable for real-time communication applications in automotive, aerospace, marine, rail transportation, industrial automation, and medical equipment sectors.

5. Advanced Analog Peripherals

20-channel 12-bit ADC: 1 Msps sampling rate, supporting multi-channel analog signal acquisition

3-channel 16-bit Sigma-Delta ADC: High-precision, low-noise measurement, suitable for sensor signal conditioning

1-channel 10-bit DAC: Analog output control

6. Intelligent Timing and Control

5 16-bit Timers/Counters (TC)

3 Enhanced Control Timers (TCC): Support PWM generation, fault protection, and dead-time configuration

20 PWM channels: Meet motor control and power management requirements

7. Peripheral Touch Controller (PTC)

Supports capacitive touch buttons, sliders, and scroll wheels for user interfaces, featuring noise and water droplet immunity, suitable for touch-interactive applications such as home appliance control panels and industrial HMIs.

8. Advanced System Features

12-channel DMAC: Enables efficient data transfer between peripherals and memory

Event system: Supports direct signal passing between peripherals, reducing CPU load

DIVAS hardware accelerator: Accelerates hardware division and square root operations

CRC-32 generator: Data integrity verification

Watchdog timer, real-time clock/calendar

Serial Wire Debug (SWD): Supports programming, testing, and debugging

9. Functional Safety Support

The ATSAMC21J18A-AZ supports the ISO 26262 (ASIL B), IEC 61508 (SIL 2/3), and IEC 60730 (Class B) functional safety standards. Microchip provides functional safety manuals, FMEDA, and related diagnostic software resources to help developers accelerate the product certification process for functional safety compliance.

Detailed Specifications

Manufacturer: Microchip Technology

Product Model: ATSAMC21J18A-AZ

Product Series: SAM C21, Functional Safety (FuSa)

Core Processor: ARM® Cortex®-M0+ 32-bit single-core

Maximum Clock Speed: 48 MHz

Program Memory (Flash): 256 KB

EEPROM-emulated Flash: 4KB self-programming Flash

SRAM Main Memory: 32KB

Number of I/O Pins: 52

Operating Voltage: 2.7V ~ 5.5V

Operating Temperature Range: -40°C ~ 125°C

Data Converters: A/D 20x12-bit, 3x16-bit; D/A 1x10-bit

Communication Interfaces: CAN bus, I²C (up to 3.4 MHz), LIN bus, SPI, UART/USART

Timers: 5 x 16-bit TC, 3 x TCC, 20 x PWM channels

Peripherals: Brown-out detection/reset (BOD), DMA, POR, WDT, PTC

Oscillator Types: Internal oscillator (32 kHz, 32 kHz ULP, 48 MHz)

Package Type: 64-TQFP (10 mm × 10 mm)

Pin Pitch: 0.5 mm

Mounting Type: Surface Mount (SMD)

Packaging: Tray

Standard Packaging: 1,600 pieces per tray

Mingjiada Supply Services

Mingjiada Electronics maintains a long-term stock of genuine Microchip ATSAMC21J18A-AZ microcontroller chips and provides global supply and recycling services for Microchip 32-bit microcontrollers (MCUs). We guarantee that all products are genuine and traceable through our supply chain.