ATSAMG55J19B-AU

Overview

The ATSAMG55J19B-AU is a 32-bit ARM Cortex-M4 microcontroller from the SAM G55 series, operating at up to 120 MHz. It features 512 Kbytes of Flash memory and 176 Kbytes of SRAM (160 Kbytes main + 16 Kbytes cache/I-D). The device includes an integrated Floating Point Unit (FPU) and DSP instructions. It provides 48 I/O lines and supports interfaces including USART, SPI, TWI, USB 2.0 Full Speed Device/OHCI Host, I2S, and PDM. Operating voltage ranges from 1.62 V to 3.6 V within an industrial temperature range of -40°C to +85°C.

Feature Summary

• ARM Cortex-M4 core with FPU and DSP support for high-performance processing
• Integrated crystal-less USB 2.0 Full Speed Device and OHCI Host controller
• Real-time event management system allowing peripheral interaction without processor intervention
• Three software-selectable low-power modes: Sleep, Wait, and Backup

Applications

• Consumer electronics devices
• Industrial control systems
• PC peripherals

Procurement Notes

Verify the specific ordering suffix 'AU' corresponds to the LQFP-64 package in tray carrier type as defined in the official Microchip ordering table. Confirm that the 'B' variant designation aligns with current manufacturing specifications. Ensure compatibility with the required industrial temperature range (-40°C to +85°C) for your application environment before finalizing procurement.

Selection Notes

Select this component if your design requires a 64-pin LQFP package with 48 available I/O lines. It is suitable for applications needing integrated USB host capabilities via OHCI alongside standard communication interfaces like SPI and I2C. Consider the 1.62V to 3.6V supply range and the presence of an on-chip voltage regulator when designing power circuits.

Part Context

This part belongs to the Atmel | SMART SAM G55 family of Flash microcontrollers based on the ARM Cortex-M4 architecture. The J19 configuration specifically denotes the 512KB Flash and 176KB SRAM capacity within the SAM G55J series, distinguishing it from the G-series which utilizes a WLCSP package.

Replacement Considerations

ATSAMG55J19A-AU is a documented alternative within the same package and feature set, differing primarily in the MRL (Manufacturing Release Level) code.