PIC32MX675F256LT-80V/PT
PIC32MX675F256LT-80V/PT - 80MHz 32-bit MCU, 256KB Flash, USB-OTG/Ethernet | Microchip
The Microchip Technology PIC32MX675F256LT-80V/PT is a 32-bit MIPS MCU from the PIC32MX5/6/7 family featuring 256KB Flash, 64KB RAM, integrated 10/100 Ethernet MAC, USB-OTG, and an 80 MHz maximum operating speed, housed in a 100-pin TQFP (12x12 mm) package. The device delivers 80 DMIPS of computational throughput from a single-core MIPS32 M4K pipeline and is manufactured on a CMOS process optimized for low-power embedded connectivity.
A 32-bit microcontroller (MCU) is a programmable system-on-chip that integrates a high-performance processor core, program and data memory, and a rich set of peripherals into a single IC. The PIC32MX675 series sits within Microchip's PIC32 family, which targets embedded applications requiring connectivity (USB, Ethernet), graphical HMI (via PMP/parallel master port), and real-time control. In the broader product hierarchy, an MCU is a type of microcontroller -> embedded processor -> semiconductor IC. The "MX" naming convention indicates the MIPS-based M4K core family.
Key differentiating specifications include: 256KB (256K x 8) Flash program memory, 64KB SRAM, 83 general-purpose I/O lines, a 16-channel 10-bit ADC at up to 1 Msps, five 16-bit timers, two I2C, two SPI, two UART, USB-OTG (host/device/On-The-Go), 10/100 Mbps Ethernet MAC with MII/RMII interface, two I2S/SPDIF audio interfaces, a Parallel Master Port (PMP) for graphics/parallel memory, and DMA with 8 channels. Supply voltage is 2.3V to 3.6V (nominal 3.3V), and operating temperature range is -40C to +105C (industrial grade "V" suffix). The "T" suffix denotes tape-and-reel packaging, while "80" denotes 80 MHz max frequency.
The architecture combines a Harvard-style bus with separate instruction and data paths to Flash/SRAM, allowing simultaneous fetch and data access. Peripherals are connected via a peripheral bus matrix with DMA support, offloading data movement from the core. The 10/100 Ethernet MAC integrates an MII/RMII interface that connects to an external PHY such as the Microchip KSZ8041 or DP83848, eliminating the need for an external network processor. USB-OTG support enables both host and device roles, useful for embedded peripherals that must act as either.
Typical applications include industrial Ethernet gateways and PLCs, USB-enabled data acquisition modules, embedded web servers, home automation controllers, medical telemetry devices, point-of-sale terminals, and graphical HMI panels. The combination of Ethernet, USB-OTG, and PMP graphics support makes this MCU particularly suited to networked HMI products where a single chip must handle both communications and display.
When designing with this MCU, ensure that the 3.3V supply is well regulated with low noise to avoid corruption of ADC and Ethernet signals. The Ethernet MAC requires an external PHY (e.g., KSZ8041), 25 MHz reference clock, and proper MII/RMII termination. JTAG/ICSP programming requires the standard Microchip 4-wire interface plus a dedicated programming header footprint.
This page consolidates distributor pricing, parametric drop-in alternatives in the same TQFP-100 footprint, and design guidance that supplements the manufacturer datasheet for engineers evaluating the PIC32MX675 family.
USD $6.95
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