PIC32MX675F256HT-80V/MR - 80MHz 32-bit MCU 256KB Flash USB Ethernet
MPN: PIC32MX675F256HT-80V/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.7544 | $3.75 |
PIC32MX675F256HT-80V/MR Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory (Flash), volatile working memory (RAM), and a rich set of peripherals. The PIC32MX5/6/7 family targets embedded connectivity-based applications, sitting in the PIC32 hierarchy between simpler PIC32MX1/2/3/4 devices and higher-pin-count PIC32MX7 series. It uses the MIPS32 M4K RISC core, licensed architecture now maintained by MIPS, optimized for deterministic real-time control with predictable interrupt latency.
Key features include 256 KB on-chip Flash, 64 KB SRAM, DMA controller, four 16-bit timers, two I2C, two SPI, two UART, USB-OTG full-speed, 10/100 Mbps Ethernet MAC, 10-bit 1 MspsA conversion ADC with 16 channels, and five 16-bit compare/PWM modules. The "V" temperature grade supports -40C to +105C, while "80" denotes the 80 MHz maximum operating frequency.
Typical applications include industrial Ethernet gateways, USB peripherals, embedded web servers, HMI controllers, point-of-sale terminals, and connectivity-equipped sensor nodes. Engineers choose this part when a single chip must host both TCP/IP networking and USB device/host functions without external PHY complexity.
When designing, ensure the exposed thermal pad is soldered to a sufficient copper pour for thermal dissipation. Verify the supply voltage stays within 2.3V-3.6V during transient load steps. The MPLAB Harmony framework provides TCP/IP, USB, and graphics stacks to accelerate development.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on DigiKey or Mouser product pages. All specifications reflect the manufacturer datasheet current at the time of verification.
Drop-in alternatives for PIC32MX675F256HT-80V/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 PIC32MX675F256HT-80V/MR (same form factor and footprint) — differing in ADC, USB, Package, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX675F256HT-80I/MR
✅ Drop-In✓ In Stock
$7.32 / Unit
View Datasheet →PIC32MX675F256H-80V/MR
✅ Drop-In✓ In Stock
$4.62 / Unit
View Datasheet →PIC32MX675F256H-80V/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.58 / Unit
View Datasheet →PIC32MX564F128H-V/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.32 / Unit
View Datasheet →PIC32MX664F128H-V/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.71 / Unit
View Datasheet →PIC32MX450F256H-V/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.15 / Unit
View Datasheet →PIC32MX575F256H-80V/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX675F256HT-80V/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| CPU Core | 32-bit RISC, single-core |
| Maximum Clock Speed | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 64 KB |
| Operating Voltage (Vcc/Vdd) | 2.3 V to 3.6 V |
| I/O Pins | 53 |
| Package Type | 64-VQFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| ADC | 10-bit, 16 channels, 1 Msps |
| Connectivity | USB-OTG, 10/100 Ethernet MAC |
| Communication Interfaces | 2x I2C, 2x SPI, 2x UART |
| DMA | Yes, integrated |
| Timers | 4x 16-bit, 5x 16-bit Compare/PWM |
| Operating Temperature Range | -40C to +105C (V grade) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX675F256HT-80V/MR 64-vqfn (9x9 mm) with exposed pad Pin Configuration Guide
Pin configuration for PIC32MX675F256HT-80V/MR (64-vqfn (9x9 mm) with exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC32MX675F256HT-80V/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX675F256HT-80V/MR is suitable for 6 applications: Industrial Ethernet Gateway, USB-OTG Peripheral Device, Embedded Web Server / HMI Controller, Point-of-Sale (POS) Terminal, IoT Sensor Node with Wired Connectivity, Automotive-Grade Telematics Module (Engineered Variant).
Industrial Ethernet Gateway
The PIC32MX675F256HT-80V/MR is ideal for industrial Ethernet gateways because of its integrated 10/100 Mbps Ethernet MAC and USB-OTG full-speed interface. The 80 MHz MIPS32 M4K core runs Microchip's TCP/IP stack (TCP/IP Lite or the open-source lwIP) at line speed while supporting Modbus/TCP, EtherNet/IP, or PROFINET application layer. 256 KB Flash accommodates the full TCP/IP stack plus application logic, while 64 KB RAM supports multiple sockets and TLS buffers. The -40C to +105C V grade handles factory-floor temperatures without thermal derating, and the 9x9 mm VQFN footprint fits inside compact DIN-rail enclosures. Engineers pair this MCU with an external PHY like the LAN8720A or DP83848 for 100BASE-TX connectivity.
Recommended
USB-OTG Peripheral Device
The PIC32MX675F256HT-80V/MR's integrated USB-OTG full-speed transceiver makes it ideal for USB peripherals requiring dual-role (host/device) operation. Designers can build USB mass storage devices, USB audio devices, USB HID controllers, or USB CDC serial bridges without external transceiver chips. The on-chip transceiver saves BOM cost and PCB area, while the DMA engine offloads bulk endpoint transfers from the CPU. The 64-pin package exposes both USB D+/D- pins plus the VBUS detect required for OTG dual-role operation. 256 KB Flash accommodates the Microchip USB stack (full-speed only, not high-speed) plus class drivers for the target USB class. This MCU suits industrial data loggers, USB scanners, and embedded measurement instruments.
Recommended
Embedded Web Server / HMI Controller
The PIC32MX675F256HT-80V/MR powers embedded web servers and HMI controllers by running the Microchip TCP/IP stack plus an HTTP server with dynamic page generation. The 80 MHz core handles simultaneous TCP connections, while 64 KB RAM supports dynamic web pages with form processing. 10-bit ADC inputs enable local sensor monitoring (temperature, humidity, current, voltage) with values exposed via web interface. The 53 GPIO pins drive LCDs, keypads, LEDs, and relay outputs typical in HMI panels. The V grade (-40C to +105C) supports outdoor enclosures and industrial cabinets. Compact 9x9 mm VQFN packaging enables mounting behind the display panel where space is constrained.
Recommended
Point-of-Sale (POS) Terminal
The PIC32MX675F256HT-80V/MR drives point-of-sale terminals by combining USB peripherals (barcode scanners, receipt printers, cash drawers), Ethernet connectivity (for cloud payment processing), and 10-bit ADC inputs (for battery monitoring on mobile POS). The integrated Ethernet MAC supports cloud-based payment authorization without external bridge chips. The 80 MHz MIPS32 M4K core processes encrypted payment payloads while maintaining sub-200ms transaction latency. 256 KB Flash fits TLS libraries and application firmware, while 64 KB RAM supports simultaneous SSL handshake and user interface rendering. The compact VQFN package allows slim, hand-held terminal form factors.
Recommended
IoT Sensor Node with Wired Connectivity
The PIC32MX675F256HT-80V/MR suits wired IoT sensor nodes that need Ethernet connectivity for industrial IoT (IIoT) deployments. The 16-channel 10-bit ADC samples multiple analog sensors (RTDs, thermocouples, 4-20 mA current loops, voltage dividers), while DMA offloads conversions from the CPU. The Ethernet MAC streams sensor data to SCADA systems or cloud platforms using protocols like MQTT-SN over TCP. The -40C to +105C V grade supports outdoor installations and factory-floor sensor housings. Low-power standby modes with RTC wake-up extend battery life on remote sensor nodes, though the Ethernet MAC requires line power for continuous operation.
Recommended
Automotive-Grade Telematics Module (Engineered Variant)
The PIC32MX675F256HT-80V/MR (V grade -40C to +105C) is used in non-safety-critical automotive telematics modules such as fleet tracking devices, vehicle diagnostic loggers, and aftermarket infotainment accessories. Although it does not carry full AEC-Q100 certification, the wide temperature range and integrated Ethernet/USB make it suitable for cabin and trunk-mounted telematics. Designers requiring AEC-Q100 should select Microchip's dedicated automotive-grade PIC32 variants. The 256 KB Flash fits CAN-over-Ethernet gateway firmware plus OBD-II diagnostic code libraries. The compact VQFN-64 footprint integrates into space-constrained OBD-II dongles and behind-dash modules.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX675F256HT-80V/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX675F256HT-80I/MR | PIC32MX675F256H-80V/MR | PIC32MX564F128H-V/MR | PIC32MX664F128H-V/MR | PIC32MX450F256H-V/MR |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Maximum Clock Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 120 MHz (+50%) |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 128 KB (-50%) | 256 KB |
| RAM | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 64 KB |
| Ethernet MAC | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| USB OTG | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +105C (V) | -40C to +85C (I) | -40C to +105C (V) | -40C to +105C (V) | -40C to +105C (V) | -40C to +105C (V) |
Key Differentiators
- Wider operating temperature range (vs PIC32MX675F256HT-80I/MR)
- Higher Flash and RAM (vs PIC32MX564F128H-V/MR)
- Dual connectivity (USB + Ethernet) (vs PIC32MX575F256H-80V/MR)
- Lower power at 80 MHz (vs PIC32MX450F256H-V/MR)
Design Notes
Estimated: The 64-VQFN package with exposed pad requires soldering the EP to a copper pour of at least 25 mm x 25 mm on top PCB layer for thermal dissipation. At 80 MHz with Ethernet active, power consumption reaches approximately 85 mA typical at 3.3V. Without adequate copper, junction temperature can rise above 105C under continuous operation. A 4-layer PCB with dedicated ground plane is recommended for industrial temperature grade operation. Reference Microchip AN1266 for PIC32 thermal management guidelines.
Place a 10 uF decoupling capacitor on each VDD/VSS pair, with a 0.1 uF ceramic placed within 5 mm of each VDD pin for high-frequency noise suppression. The PIC32MX675F256H is sensitive to supply ripple above 50 mVpp at the core, which can corrupt Flash operations and ADC conversions. Use a low-dropout regulator such as MCP1700 or MIC29150 for clean 3.3V supply. Avoid routing high-current switching traces near the analog VDD pins to prevent ADC measurement corruption.
Common design pitfalls: (1) Forgetting to solder the exposed pad causes thermal shutdown under load. (2) Using HSE crystals without proper load capacitors (typically 15-20 pF). (3) Failing to add pull-up resistor on MCLR pin (10 koh per resistor to VDD). (4) Leaving the VBAT pin floating if RTC is used. (5) Not configuring the JTAG/Trace pins correctly - they are enabled by default after reset and can interfere with peripheral functions if not properly disabled in firmware.
Keep the 50 MHz Ethernet RMII traces under 50 mm total length and route them as 50 ohm controlled impedance with continuous ground reference. Place the external PHY (LAN8720A) within 50 mm of the MCU for signal integrity. Separate analog and digital ground planes if possible, joining at a single point under the MCU ground pin. Route USB D+/D- as 90 ohm differential pair, keep under 50 mm length, and add 15 kohm pull-down on D+ and D- for full-speed device mode.
Compliance Information
RoHS compliant per Microchip product documentation. V grade -40C to +105C supports industrial environments but is not AEC-Q100 qualified. For full automotive qualification, select Microchip's dedicated AEC-Q100 PIC32 variants.
