ATSAMG55G19B-UUT

Overview

The ATSAMG55G19B-UUT is a 32-bit microcontroller based on the ARM Cortex-M4 processor with an integrated Floating Point Unit (FPU). It operates at a maximum frequency of 120 MHz and includes 512 Kbytes of Flash memory, up to 176 Kbytes of SRAM, and 8 Kbytes of ROM. The device features 38 programmable I/O lines and supports multiple communication interfaces including USART, SPI, TWI, USB Full Speed, and OHCI Host. It incorporates an 8-channel 12-bit ADC, two I2S controllers, and a Pulse Density Modulation interface. Operating within a voltage range of 1.62 V to 3.6 V, it utilizes a 49-lead Wafer Level Chip Scale Package (WLCSP) and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• High-performance processing capability provided by the ARM Cortex-M4 core with FPU and DSP instructions operating up to 120 MHz.
• Integrated crystal-less USB 2.0 Device functionality combined with USB On-Chip Host Controller Interface (OHCI) support.
• Flexible clock system enabling independent peripheral clock frequencies and real-time event management for low-power operation.
• Rich peripheral set including dual Inter-IC Sound controllers, pulse density modulation interface, and extensive DMA channels.

Applications

• Consumer electronics devices requiring high processing performance in compact form factors
• Industrial control systems utilizing flexible communication interfaces
• PC peripherals and audio applications supported by I2S and PDM capabilities

Procurement Notes

Verify the specific ordering suffix 'B' against official Microchip documentation to confirm package carrier type and manufacturing revision details. Ensure compatibility with the 49-ball WLCSP footprint during PCB layout. Confirm that the industrial temperature rating aligns with environmental requirements. Cross-reference the part number with current datasheet revisions to validate all electrical specifications before finalizing procurement orders.

Selection Notes

Select this component when a balance of high-speed processing and minimal physical footprint is required. The WLCSP package suits space-constrained designs compared to QFN or LQFP alternatives. Consider the 38 available I/O lines against application pin requirements. Evaluate the 1.62 V to 3.6 V supply range against system power architecture constraints and ensure adequate thermal management for the small package size.

Part Context

This device belongs to the Atmel SMART SAM G55 series of microcontrollers. The series integrates high-performance ARM Cortex-M4 cores with rich peripheral sets and low-power modes. The SAM G55G variant specifically offers the WLCSP package option, distinguishing it from the J-series which provides QFN and LQFP packages. All variants share the same core architecture and memory configuration.

Replacement Considerations

ATSAMG55G19A-UUT