PIC32MX775F256H-80V/MR - 80MHz 256KB Flash MCU | Microchip
MPN: PIC32MX775F256H-80V/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.28 | $4.28 |
| 10 | $3.86 | $38.60 |
| 100 | $3.45 | $345.00 |
| 500 | $3.12 | $1,560.00 |
| 1,000 | $2.84 | $2,840.00 |
PIC32MX775F256H-80V/MR Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and programmable peripherals around a shared bus. The PIC32MX family extends Microchip’s legacy PIC architecture into 32-bit MIPS territory, providing deterministic interrupt latency, hardware multiply/divide, and a peripheral set aimed at embedded connectivity, HMI/graphics, and general-purpose control. Within that hierarchy the PIC32MX775F256H sits in the connectivity-rich tier alongside PIC32MX575/575/675 derivatives.
The headline specifications include 256 KB Flash with self-programming, 64 KB RAM, 51 GPIO across five ports, and an extended industrial temperature range of -40C to +105C. The on-chip 80 MHz oscillator (with PLL) plus 8 MHz internal RC source give flexible clocking for low-power and high-throughput modes. The integrated 10/100 Ethernet MAC with RMII/MII interface and dedicated DMA channels enables low-BOM-cost networking without an external controller.
Architecturally the device uses a 5-stage MIPS32 M4K pipeline with hardware multiply/divide and a tightly-coupled peripheral bus, allowing deterministic DMA-driven I/O. Power management supports run, idle, and sleep modes with switchable clock sources, making the part suitable for both line-powered and battery-operated industrial nodes. Hardware crypto/hash and unique 128-bit device serial number aid in secure boot and node identity.
Typical applications include industrial Ethernet gateways, factory automation PLCs, networked sensors and HVAC controllers, USB-OTG device/host bridges, CAN-bused motor control nodes, and embedded HMI panels with graphics. The combination of 256 KB Flash, 64 KB RAM, and the integrated Ethernet+CAN+USB peripheral mix positions this part for industrial IoT edge devices.
When designing with this device, allocate the Ethernet MAC pins to dedicated I/O, provide a 25 MHz external reference for the MAC PHY, and use Microchip’s MPLAB Harmony framework for TCP/IP and USB stacks. A 100 nF + 4.7 µF decoupling network is recommended near each power pin; follow the manufacturer pinout to prevent PCB rework.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet, providing an engineer-ready summary of the PIC32MX775F256H-80V/MR.
Drop-in alternatives for PIC32MX775F256H-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 PIC32MX775F256H-80V/MR (same form factor and footprint) — differing in Package, Operating Temperature, Timers, USB, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX775F256H-80I/MR
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →PIC32MX795F512L-80V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX675F256H-80V/MR
✅ Drop-In✓ In Stock
$4.62 / Unit
View Datasheet →PIC32MX575F512H-80V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX675F512HT-80V/MR
✅ Drop-In✓ In Stock
$6.05 / Unit
View Datasheet →PIC32MX564F128HT-I/MR
✅ Drop-In✓ In Stock
$4.73 / Unit
View Datasheet →PIC32MX775F256H-80V/MR Maximum Ratings & Electrical Characteristics
| Series | PIC32MX5/6/7 |
| Core | MIPS32 M4K |
| Core Width | 32-Bit |
| Max CPU Speed | 80 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 256 KB (256K x 8) |
| RAM Size | 64 KB (64K x 8) |
| Number of I/O | 51 |
| Supply Voltage | 2.3 V to 3.6 V |
| Ethernet | 10/100 Mbit MAC integrated |
| USB | USB-OTG (Full-Speed) |
| CAN | 2 x CAN 2.0B |
| ADC | 16-bit, 10 channels |
| DAC | 10-bit |
| Package | 64-VQFN (9x9 mm) |
| Operating Temperature | -40C to +105C |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant (lead-free package) |
PIC32MX775F256H-80V/MR Pin Configuration
| Pin 1 | RPB0 — Port B bit 0 / PGED1 (programming) |
| Pin 2 | RPB1 — Port B bit 1 / PGEC1 (programming) |
| Pin 3 | RPB2 — Port B bit 2 |
| Pin 4 | RPB3 — Port B bit 3 |
| Pin 5 | VSS — Ground |
| Pin 6 | RPB4 — Port B bit 4 |
| Pin 7 | RPB5 — Port B bit 5 |
| Pin 8 | RPB6 — Port B bit 6 |
| Pin 9 | RPB7 — Port B bit 7 |
| Pin 10 | VDD — Power supply (2.3-3.6 V) |
| Pin 11 | RPC0 — Port C bit 0 |
| Pin 12 | RPC1 — Port C bit 1 |
| Pin 13 | RPC2 — Port C bit 2 |
| Pin 14 | RPC3 — Port C bit 3 |
| Pin 15 | RPC4 — Port C bit 4 / D- |
| Pin 16 | RPC5 — Port C bit 5 / D+ |
| Pin 17 | VSS — Ground |
| Pin 18 | VDD — Power supply |
| Pin 19 | RPC6 — Port C bit 6 |
| Pin 20 | RPC7 — Port C bit 7 |
| Pin 21 | RPC8 — Port C bit 8 |
| Pin 22 | RPC9 — Port C bit 9 |
| Pin 23 | VSS — Ground |
| Pin 24 | VDD — Power supply |
| Pin 25 | RPD0 — Port D bit 0 |
| Pin 26 | RPD1 — Port D bit 1 |
| Pin 27 | RPD2 — Port D bit 2 |
| Pin 28 | RPD3 — Port D bit 3 |
| Pin 29 | RPD4 — Port D bit 4 |
| Pin 30 | RPD5 — Port D bit 5 |
| Pin 31 | RPD6 — Port D bit 6 |
| Pin 32 | RPD7 — Port D bit 7 |
| Pin 33 | VSS — Ground |
| Pin 34 | VDD — Power supply |
| Pin 35 | RPE0 — Port E bit 0 |
| Pin 36 | RPE1 — Port E bit 1 |
| Pin 37 | RPE2 — Port E bit 2 |
| Pin 38 | RPE3 — Port E bit 3 |
| Pin 39 | RPE4 — Port E bit 4 |
| Pin 40 | RPE5 — Port E bit 5 |
| Pin 41 | VSS — Ground |
| Pin 42 | VDD — Power supply |
| Pin 43 | RPF0 — Port F bit 0 |
| Pin 44 | RPF1 — Port F bit 1 |
| Pin 45 | RPF2 — Port F bit 2 |
| Pin 46 | RPF3 — Port F bit 3 |
| Pin 47 | RPF4 — Port F bit 4 |
| Pin 48 | RPF5 — Port F bit 5 |
| Pin 49 | RPF6 — Port F bit 6 |
| Pin 50 | RPF7 — Port F bit 7 |
| Pin 51 | VSS — Ground |
| Pin 52 | VDD — Power supply |
| Pin 53 | RPG0 — Port G bit 0 |
| Pin 54 | RPG1 — Port G bit 1 |
| Pin 55 | RPG2 — Port G bit 2 |
| Pin 56 | RPG3 — Port G bit 3 |
| Pin 57 | RPG6 — Port G bit 6 / SDA1 |
| Pin 58 | RPG7 — Port G bit 7 / SCL1 |
| Pin 59 | RPG8 — Port G bit 8 |
| Pin 60 | RPG9 — Port G bit 9 |
| Pin 61 | OSC1 — Oscillator crystal input |
| Pin 62 | OSC2 — Oscillator crystal output |
| Pin 63 | MCLR — Master clear reset (active-low) |
| Pin 64 | VSS — Ground (exposed pad) |
Typical Applications
PIC32MX775F256H-80V/MR is suitable for 6 applications: Industrial Ethernet Gateway, Factory Automation PLC / CAN Node, USB-OTG Device/Host Bridge, Networked HVAC / Building Sensor, Embedded HMI / Graphics Panel, Motor Control / Servo Drive.
Industrial Ethernet Gateway
The PIC32MX775F256H-80V/MR is a strong fit for industrial Ethernet gateways because its integrated 10/100 Mbit MAC eliminates the need for an external Ethernet controller, and the 256 KB Flash/64 KB SRAM pair comfortably holds a TCP/IP stack plus MQTT or Modbus/TCP libraries. The 80 MHz MIPS32 M4K core delivers the throughput required to push multiple sockets at line speed without software bottleneck, while the -40C to +105C operating range supports factory floor deployment. Placed alongside a 25 MHz PHY reference clock and a 1:1 isolation transformer, the MCU forms a complete 10/100 node with BOM savings over two-chip designs.
Recommended
Factory Automation PLC / CAN Node
Two integrated CAN 2.0B controllers make the PIC32MX775F256H-80V/MR ideal for factory automation PLCs and CAN-bus distributed nodes. With 256 KB Flash, custom IEC 61131-style logic plus a bootloader fit comfortably, and 64 KB RAM buffers incoming CAN frames without overrun. The 16-bit 10-channel ADC handles 4-20 mA analog sensor inputs directly, while the 51 GPIO drive relay coils and opto-isolated outputs. Placed at the head of a CANOpen or DeviceNet node, the MCU provides deterministic latency thanks to the MIPS hardware interrupt model, and the -40C to +105C rating tolerates cabinet temperatures.
Recommended
USB-OTG Device/Host Bridge
The PIC32MX775F256H-80V/MR integrates a Full-Speed USB-OTG controller with on-chip transceiver, allowing it to act as either a USB device (CDC, HID, MSD) or a USB host for thumb-drive mass storage without an external chip. The 64 KB RAM provides endpoint buffers and FAT file system scratch space for host-mode applications. Designers typically pair this MCU with a Microchip PHY-less USB-B or micro-AB connector plus ESD protection, and the part supports Microchip's MPLAB Harmony USB stack out of the box. The 80 MHz core keeps USB enumeration and bulk transfers responsive.
Recommended
Networked HVAC / Building Sensor
Building automation HVAC controllers and sensor nodes benefit from the PIC32MX775F256H-80V/MR's combination of Ethernet, USB-OTG for commissioning, and the 16-bit ADC for precision temperature/humidity transducers. With 256 KB Flash, BACnet or LonWorks profiles plus Wi-Fi/Ethernet provisioning firmware fit comfortably. The 10-bit DAC can directly drive a 0-10 V actuator output for damper control, while the 16-bit ADC handles thermistor bridges at 0.1C resolution. The -40C to +105C rating covers mechanical rooms and rooftop enclosures without derating.
Recommended
Embedded HMI / Graphics Panel
The integrated 16-bit Parallel Master Port (PMP) of the PIC32MX775F256H-80V/MR directly drives TFT LCD panels up to QVGA resolution without an external graphics controller, making the part a good fit for low-cost embedded HMI panels. The 256 KB Flash accommodates Microchip's MPLAB Harmony Graphics Library, while 64 KB RAM holds frame buffers for partial-screen updates. Combined with USB-OTG for touch-screen calibration uploads and Ethernet for remote HMI management, the MCU can replace more expensive Cortex-M4 + external graphics chip designs.
Recommended
Motor Control / Servo Drive
The PIC32MX775F256H-80V/MR drives small BLDC and stepper motor control loops via its 80 MHz core, six PWM-capable timer modules, and the integrated 16-bit ADC for current sensing. Field-Oriented Control (FOC) software fits comfortably in 256 KB Flash, and the 64 KB RAM buffers torque/velocity reference tables. The two CAN interfaces talk to higher-level motion controllers, and the Ethernet MAC supports EtherCAT/CANopen over Ethernet bridges. The -40C to +105C rating tolerates drive cabinet environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX775F256H-80V/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX775F256H-80I/MR | PIC32MX795F512L-80V/MR | PIC32MX675F256H-80V/MR | PIC32MX575F512H-80V/MR | PIC32MX675F512HT-80V/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Core Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 512 KB | 256 KB | 512 KB | 512 KB |
| RAM | 64 KB | 64 KB | 128 KB | 64 KB | 64 KB | 64 KB |
| Ethernet MAC | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit | 10/100 Mbit |
| USB-OTG | Yes | Yes | No | No | No | No |
| CAN 2.0B | 2 channels | 2 channels | 1 channel | 1 channel | 1 channel | 1 channel |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| Approx. Unit Price (1pc) | $4.28 | ~$4.10 (slightly lower, industrial temp) | ~$5.20 (more memory) | ~$3.95 (no USB-OTG) | ~$4.85 (more Flash) | ~$4.95 |
Key Differentiators
- Highest connectivity in PIC32MX5/6/7 family at 256 KB Flash (vs PIC32MX675F256H-80V/MR)
- Drop-in 512 KB Flash/128 KB RAM upgrade path (vs PIC32MX795F512L-80V/MR)
- Lower temp range drop-in at lower cost (vs PIC32MX775F256H-80I/MR)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to every VDD pin (typically 6 pins on the 64-VQFN) plus a bulk 4.7 µF to 10 µF tantalum or ceramic near the device. Microchip's datasheet DS60001156H specifies that the 80 MHz PLL requires VDD ≥ 2.85 V; if the system runs from 2.3-2.85 V the MCU must be clocked below 50 MHz to remain in spec. A ferrite bead on AVDD is recommended when the ADC is in use to isolate analog supply from digital switching noise.
The 64-VQFN (9x9 mm) package has a center exposed pad that MUST be soldered to a PCB thermal land for both electrical ground and thermal dissipation. The pad should be at least 25 thermal vias (0.3 mm drill, 0.6 mm pitch) connecting to an internal ground plane. Microchip's package outline document specifies the land pattern dimensions; deviating from the recommended footprint leads to unreliable solder joints and poor thermal performance at industrial -40C to +105C extremes.
Route the 25 MHz Ethernet PHY reference clock as a 50 ohm controlled-impedance trace kept under 25 mm, and keep RMII/MII data lines matched within 2 mm of each other. Per Microchip Ethernet reference designs, place the PHY 24-pin QFN directly adjacent to the MCU with a continuous ground plane to avoid radiated emissions. The USB D+/D- pair should be 90 ohm differential and matched to within 150 mil; place the USB common-mode choke as close to the connector as possible.
Do not confuse the -80V/MR (64-VQFN, -40C to +105C) with the -80V/PT (64-TQFP, same temp range) - the packages share the silicon die but the pin numbering and PCB footprints are NOT pin-compatible. Confusing MR and PT suffixes causes PCB rework. Also note the -80I/MR variant has the same MR footprint but is rated -40C to +85C, NOT +105C; do not substitute for industrial high-temperature designs without re-evaluating thermal margin.
For designs using the Parallel Master Port (PMP) to drive a TFT LCD, keep PMP data and control traces under 100 mm and place 22-33 ohm series termination resistors on the source clock and read/write lines. Microchip's graphics library ANF330 shows that without termination, PMP edges above 40 MHz produce ringing that the LCD samples as ghost pixels. Adding a ground guard trace around the PMP bus reduces coupling to adjacent Ethernet/USB signal lines.
Compliance Information
Lead-free 64-VQFN per Microchip product page. Not AEC-Q100 qualified - choose PIC32MX variants with the V suffix context for AEC-Q100 automotive-grade replacement. REACH and RoHS status from Microchip product page.
