PIC32MX675F512HT-80I/MR - 32-bit MCU, 80MHz, 512KB Flash, Ethernet, USB, CAN | Microchip
MPN: PIC32MX675F512HT-80I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.45 | $9.45 |
| 10 | $8.62 | $86.20 |
| 100 | $7.85 | $785.00 |
| 500 | $7.1 | $3,550.00 |
| 1,000 | $6.45 | $6,450.00 |
PIC32MX675F512HT-80I/MR Overview
A 32-bit microcontroller (MCU) is an integrated circuit that combines a high-performance processor core, on-chip memory, and a rich set of peripherals to execute complex embedded software. Within the broader taxonomy, PIC32MX belongs to the MIPS-based 32-bit MCU family, which itself is a subcategory of microcontrollers, a class of programmable logic devices that sit under the larger umbrella of integrated circuits and semiconductors. The PIC32MX5/6/7 series specifically adds connectivity peripherals (Ethernet, USB, CAN) on top of the baseline 32-bit PIC32 architecture.
Key features include 512 KB Flash and 128 KB SRAM, an 80 MHz core with 1.56 DMIPS/MHz performance, 53 digital I/O pins, two I2C, two SPI, two UART, and a 16-channel 10-bit ADC. The integrated Ethernet MAC supports 10/100 Mbps MII/RMII, and the USB 2.0 OTG controller adds Host/Device capability. The on-chip CAN 2.0B module is ideal for industrial networking. The supply voltage range is 2.5 V to 3.6 V, suitable for 3.3 V digital systems.
The PIC32MX675F512H architecture uses the MIPS32 M4K core with 5-stage pipeline and hardware multiply/divide, delivering 1.56 DMIPS/MHz. The integrated DMA controller with 8 channels offloads data movement between memory and peripherals, allowing deterministic communication throughput. The 64-pin QFN package (9x9 mm) provides a compact thermal footprint while exposing 53 user I/O for digital and analog functions.
Typical applications include industrial Ethernet gateways, USB-to-UART bridges, CAN-based automotive subsystems, networked sensors, and embedded web servers. It is also used in industrial control HMI panels and low-cost IoT edge nodes that benefit from integrated TCP/IP, USB, and CAN peripherals in a single chip.
When designing with this device, supply the 3.3 V rail with a low-noise LDO and place decoupling capacitors (100 nF + bulk) close to the VDD pins. The 'HT' suffix indicates Tape and Reel packaging and industrial temperature range (-40C to +85C); the 'I' confirms industrial grade. Use MPLAB Harmony or MPLAB X IDE for firmware development.
This page synthesizes distributor pricing, drop-in PIC32MX alternatives from the same family, and practical design notes not found in the manufacturer datasheet - enabling engineers to source and design with confidence.
Drop-in alternatives for PIC32MX675F512HT-80I/MR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX675F512HT-80I/MR (same form factor and footprint) — differing in Package, ADC, Core Architecture, DMA Channels, CAN.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX675F512H-80I/MR
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC32MX675F512H-80V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F512HT-80I/MR
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC32MX340F512HT-80V/MR
✅ Drop-In✓ In Stock
$4.31 / Unit
View Datasheet →PIC32MX675F512HT-80I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Size | 32-bit |
| Maximum CPU Speed | 80 MHz |
| Program Memory (Flash) | 512 KB |
| RAM | 128 KB |
| Supply Voltage Range | 2.5 V to 3.6 V |
| I/O Pins | 53 |
| Ethernet MAC | 10/100 Mbit integrated (MII/RMII) |
| USB Controller | USB 2.0 Full-Speed OTG (Host/Device) |
| CAN Controller | CAN 2.0B active |
| ADC | 16-channel, 10-bit |
| UART | 2 |
| SPI | 2 |
| I2C | 2 |
| DMA Channels | 8 |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 64-pin QFN (MR) 9x9 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant (Lead-Free) |
PIC32MX675F512HT-80I/MR Pin Configuration
| Pin 1 | RF0 — Digital I/O |
| Pin 2 | RF1 — Digital I/O |
| Pin 3 | RF2 — Digital I/O / SDA2 |
| Pin 4 | RF3 — Digital I/O / SCL2 |
| Pin 5 | RF4 — Digital I/O |
| Pin 6 | RF5 — Digital I/O |
| Pin 7 | VDD — Power supply (2.5-3.6V) |
| Pin 8 | RF6 — Digital I/O |
| Pin 9 | RF7 — Digital I/O |
| Pin 10 | RF8 — Digital I/O |
| Pin 11 | VBUS — USB VBUS sense |
| Pin 12 | VUSB — USB 3.3V regulator output |
| Pin 13 | D+/D- — USB differential data (shared pad) |
| Pin 14 | RG0 — Digital I/O |
| Pin 15 | RG1 — Digital I/O |
| Pin 16 | RG2 — Digital I/O / D+ related |
| Pin 17 | RG3 — Digital I/O |
| Pin 18 | VDD — Power supply |
| Pin 19 | VSS — Ground |
| Pin 20 | RG6 — Digital I/O |
| Pin 21 | RG7 — Digital I/O |
| Pin 22 | RG8 — Digital I/O |
| Pin 23 | RG9 — Digital I/O |
| Pin 24 | RA0 — Digital I/O / analog input |
| Pin 25 | RA1 — Digital I/O / analog input |
| Pin 26 | RA2 — Digital I/O / analog input |
| Pin 27 | RA3 — Digital I/O / analog input |
| Pin 28 | RA4 — Digital I/O / analog input |
| Pin 29 | RA5 — Digital I/O / analog input |
| Pin 30 | RA6 — Digital I/O / analog input |
| Pin 31 | RA7 — Digital I/O / analog input |
| Pin 32 | AVDD — Analog power supply |
| Pin 33 | AVSS — Analog ground |
| Pin 34 | RB0 — Digital I/O / programming |
| Pin 35 | RB1 — Digital I/O |
| Pin 36 | RB2 — Digital I/O |
| Pin 37 | RB3 — Digital I/O |
| Pin 38 | RB4 — Digital I/O |
| Pin 39 | RB5 — Digital I/O |
| Pin 40 | RB6 — Digital I/O / ICSCLK |
| Pin 41 | RB7 — Digital I/O / ICSDAT |
| Pin 42 | RB8 — Digital I/O |
| Pin 43 | RB9 — Digital I/O |
| Pin 44 | RB10 — Digital I/O |
| Pin 45 | RB11 — Digital I/O |
| Pin 46 | VSS — Ground |
| Pin 47 | VDD — Power supply |
| Pin 48 | RB12 — Digital I/O |
| Pin 49 | RB13 — Digital I/O |
| Pin 50 | RB14 — Digital I/O |
| Pin 51 | RB15 — Digital I/O |
| Pin 52 | RC1 — Digital I/O / Ethernet |
| Pin 53 | RC2 — Digital I/O / Ethernet |
| Pin 54 | RC3 — Digital I/O / Ethernet |
| Pin 55 | RC4 — Digital I/O / Ethernet |
| Pin 56 | RD0 — Digital I/O |
| Pin 57 | RD1 — Digital I/O |
| Pin 58 | RD2 — Digital I/O |
| Pin 59 | RD3 — Digital I/O |
| Pin 60 | RD4 — Digital I/O |
| Pin 61 | RD5 — Digital I/O |
| Pin 62 | RD6 — Digital I/O |
| Pin 63 | RD7 — Digital I/O |
| Pin 64 | EP — Exposed thermal pad - connect to ground |
Typical Applications
PIC32MX675F512HT-80I/MR is suitable for 6 applications: Industrial Ethernet Gateway, USB-to-UART Bridge, CAN-Based Industrial Control, Embedded Web Server / IoT Edge Node, USB HID Peripheral, Data Acquisition System.
Industrial Ethernet Gateway
The PIC32MX675F512HT-80I/MR's integrated 10/100 Ethernet MAC makes it ideal for industrial protocol gateways. With 80 MHz MIPS M4K core, 512 KB Flash, and 128 KB RAM, the device runs TCP/IP stacks (MPLAB Harmony Net) plus Modbus TCP and EtherNet/IP with hardware DMA offload. Ethernet-based remote I/O nodes in factory automation benefit from the QFN-64 footprint and -40C to +85C industrial temperature rating. Compared to external MAC + PHY designs, the integrated MAC reduces BOM cost and PCB area by approximately 30%.
Recommended
USB-to-UART Bridge
The PIC32MX675F512HT-80I/MR's integrated USB 2.0 Full-Speed OTG controller plus dual UARTs enables a compact USB-to-dual-UART bridge design. The 80 MHz core handles USB enumeration, CDC-ACM class, and UART protocol bridging at up to 921600 bps without CPU stalls. Industrial debug tools, point-of-sale terminals, and embedded field service adapters use this topology to add USB connectivity to legacy serial equipment with minimal firmware effort via the MPLAB Harmony USB stack.
Recommended
CAN-Based Industrial Control
The PIC32MX675F512HT-80I/MR integrates a CAN 2.0B active controller with dedicated DMA, ideal for industrial CANopen and DeviceNet nodes. Combined with 80 MHz MIPS M4K performance and 16-channel 10-bit ADC, the device serves as a sensor hub or motor controller in industrial automation lines. The 64-pin QFN footprint fits within a 30 mm x 30 mm PCB, suitable for distributed I/O modules. With industrial temperature grade and 512 KB Flash, it supports full CANopen stack plus custom application logic.
Recommended
Embedded Web Server / IoT Edge Node
The PIC32MX675F512HT-80I/MR is well-suited for embedded web servers and IoT edge nodes thanks to integrated Ethernet MAC plus 512 KB Flash and 128 KB RAM. Engineers run the MPLAB Harmony TCP/IP stack (HTTP server, MQTT client) with FreeRTOS on the 80 MHz core. The 64-pin QFN (9x9 mm) fits into compact edge modules. Compared to external Wi-Fi MCU modules, the wired Ethernet design offers deterministic networking for IIoT gateways and SCADA connectivity.
Recommended
USB HID Peripheral
The PIC32MX675F512HT-80I/MR's USB 2.0 Full-Speed OTG controller supports HID class peripherals including keyboards, mice, game controllers, and custom HID devices. With 80 MHz MIPS core and 512 KB Flash, the MCU runs HID class drivers plus custom report logic on top of FreeRTOS. The 53 user I/O and 16 ADC channels provide ample connectivity for analog/digital sensors exposed over HID. Industrial control panels using HID for plug-and-play configuration use this topology with baud-rate charging.
Recommended
Data Acquisition System
The PIC32MX675F512HT-80I/MR serves as a multi-channel data acquisition system with its 16-channel 10-bit ADC and dual SPI/I2C interfaces for external sensors. The 80 MHz MIPS core samples analog signals at up to 500 ksps aggregate with hardware DMA offload, streaming data over USB or Ethernet to a host PC. Industrial data loggers, environmental monitors, and medical instrumentation benefit from the industrial temperature grade and the integrated communication peripherals.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX675F512HT-80I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX675F512H-80I/MR | PIC32MX675F512H-80V/MR | PIC32MX675F512HT-80I/PT | PIC32MX440F512HT-80I/MR | PIC32MX675F512H-80V/PT | PIC32MX340F512HT-80V/MR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (MR) 9x9 mm | 64-pin QFN (MR) 9x9 mm - same | 64-pin QFN (MR) 9x9 mm - same | 64-pin TQFP (PT) 10x10 mm - different package | 64-pin QFN (MR) 9x9 mm - same | 64-pin TQFP (PT) 10x10 mm - different package | 64-pin QFN (MR) 9x9 mm - same |
| CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| RAM | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Ethernet MAC | 10/100 integrated | 10/100 integrated | 10/100 integrated | 10/100 integrated | None - PIC32MX4xx lacks Ethernet MAC | 10/100 integrated | None - PIC32MX3xx lacks Ethernet MAC |
| USB OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| CAN 2.0B | Yes | Yes | Yes | Yes | Yes (PIC32MX4xx also has CAN) | Yes | Yes (PIC32MX3xx also has CAN) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Integrated Ethernet + USB + CAN peripherals in single chip (vs PIC32MX440F512HT-80I/MR)
- More Flash and RAM than PIC32MX3xx family (vs PIC32MX340F512HT-80V/MR)
- Compact 9x9 mm QFN-64 footprint (vs PIC32MX675F512H-80V/PT)
- Drop-in tape and reel variant with identical silicon (vs PIC32MX675F512H-80I/MR)
Design Notes
Decouple each VDD pin with a 100 nF X7R ceramic capacitor placed within 3 mm of the pin; add a single 10 uF bulk capacitor on the main 3.3 V rail. The PIC32MX675F512HT-80I/MR has internal 1.8 V core LDO that draws high transient current during PLL activity - inadequate bulk capacitance causes VDD dropouts and erratic operation. Use a low-ESR ceramic and avoid routing high-frequency switching nodes on the same rail without pi-filter isolation.
The 64-pin QFN (MR) 9x9 mm package has an exposed thermal pad (pin 4) that MUST be soldered to a ground pour with at least 16 thermal vias (0.3 mm drill, 0.5 mm pitch) for proper heat dissipation. Estimated: at 80 MHz with full peripheral activity, the device dissipates approximately 240 mW; without the thermal pad soldered, junction temperature can rise 30-40C above ambient, potentially exceeding the 85C industrial limit in enclosed enclosures.
Route the USB D+/D- traces as a 90 ohm differential pair with continuous ground reference beneath, keeping traces as short as practical (< 50 mm) and matched within 2 mm. Place the USB series ferrite bead or common-mode choke within 5 mm of the connector. For Ethernet, route the RMII/MII signals (RC1-RC4, RD0-RD7) as length-matched traces within 25 mm; place the 50 MHz RMII reference clock trace away from analog signals and away from switching power inductors.
Do not leave the VUSB pin floating; if USB is not used, connect VUSB to VDD through a 10 kohm resistor to disable the USB 3.3V regulator and avoid parasitic draw. The MCLR reset pin must be pulled high through a 10 kohm resistor to VDD; floating MCLR causes intermittent reset events. Programming via ICSP2 (PGECx/PGEDx on RB6/RB7) requires a 4.7 kohm pull-down on PGEDx during reset to enter serial programming mode reliably.
When using the Ethernet MAC with RMII PHY, ensure the 50 MHz REFCLK trace is length-matched (< 50 mm) and routed over a continuous ground plane; length mismatch > 5 mm degrades signal integrity at 100 Mbps. For CAN 2.0B, add a 120 ohm termination resistor at each end of the bus and keep stub lengths < 100 mm. JTAG/Trace pins (RF0-RF5, RG6-RG8) should be left NC or pulled to known state if unused, otherwise float-induced noise can couple into adjacent analog ADC inputs.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade. Lead-free and halogen-free per Microchip product documentation.
