The Atmel ATSAMD21J18A-CU is an embedded microcontroller that belongs to the SAM D21J, Functional Safety (FuSa) series. Bold the product name (e.g., BAV99S,135 → ATSAMD21J18A-CU) and manufacturer (e.g., Nexperia USA Inc. → Atmel).

• Manufacturer Part Number: 1046967-ATSAMD21J18A-CU
• Core Processor: ARM Cortex-M0+
• Package: bulk
• Standard Package: 1
• Mounting: SMD (SMT)
• Core Size: 32-bit single-core
• Connectivity: I2C, LINbus, SPI, UART/USART, and USB
• Peripherals: brown-out detect/reset, DMA, I2S, POR, PWM, and WDT
• I/Os: 52
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• EEPROM Size: no EEPROM size
• RAM Size: 32K x 8
• Data Converters: A/D 20x12b and D/A 1x10b
• Oscillator Type: internal
• Package/Case: 64-UFBGA
• Alternative Parts (cross-reference): ATSAMD20J18A-AU, ATSAMD20J18A-MU, ATSAMD20J18A-AN, and STM32F091RCT6
• HTSUS: 8542.31.0001