PIC32MX775F512H-80I/MR - 80MHz 512KB Flash MCU | Microchip
MPN: PIC32MX775F512H-80I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.78 | $9.78 |
| 10 | $9.04 | $90.40 |
| 100 | $7.86 | $786.00 |
| 500 | $6.92 | $3,460.00 |
| 1,000 | $5.94 | $5,940.00 |
| 3,000 | $5.41 | $16,230.00 |
PIC32MX775F512H-80I/MR Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals into one device. Within the embedded system hierarchy, the PIC32MX775F512H sits in the high-performance 32-bit MCU class, above 8/16-bit MCUs and below MPU-based application processors. It targets connected-embedded designs where Ethernet, USB, and CAN are required simultaneously.
Key features include 105 DMIPS performance from the MIPS32 M4K core with single-cycle hardware multiply, 16-bit (MX789) or 32-bit instructions, hardware trace and JTAG debug support, and a 5-stage pipeline. The Ethernet MAC supports both MII and RMII interfaces, the USB 2.0 OTG peripheral includes a transceiver and pull-up/pull-down resistors, and the two CAN modules include 1024-message buffers each.
Typical applications include industrial Ethernet gateways, USB device/host controllers, CAN-based automotive networks, building automation controllers, and embedded web servers. The wide peripheral set reduces external component count, while the 80 MHz MIPS32 core leaves headroom for TCP/IP stacks such as Microchip's MPLAB Harmony.
When designing with this MCU, ensure your PCB layout follows the VQFN-9x9 thermal pad soldering guidelines (a continuous ground plane under the exposed pad is mandatory) and place the 8 MHz crystal within 1 cm of the OSC1/OSC2 pins. The USB PHY requires a 48 MHz clock derived from the PLL; consult Microchip application note AN1429 (USB on PIC32) for hub/host listings.
Drop-in alternatives for PIC32MX775F512H-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 PIC32MX775F512H-80I/MR (same form factor and footprint) — differing in Core Architecture, ADC, Package, DMA Channels, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX775F512H-80I/MR
✅ Drop-In✓ In Stock
$5.41 / Unit
View Datasheet →PIC32MX675F512H-80I/MR
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC32MX764F128HT-I/MR
✅ Drop-In✓ In Stock
$6.04 / Unit
View Datasheet →PIC32MX695F512H-80I/MR
✅ Drop-In✓ In Stock
$9.05 / Unit
View Datasheet →PIC32MX675F256H-80I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX675F512HT-80I/MR
✅ Drop-In✓ In Stock
$6.45 / Unit
View Datasheet →PIC32MX775F512H-80I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (32-bit RISC) |
| Maximum CPU Clock | 80 MHz (105 DMIPS) |
| Flash Program Memory | 512 KB (512K x 8) |
| SRAM Data Memory | 64 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| I/O Pins | 51 |
| Package | 64-VQFN (9x9 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| Ethernet MAC | 10/100 Mbps (MII/RMII) |
| USB Peripheral | USB 2.0 On-The-Go with integrated PHY |
| CAN Modules | 2 x CAN 2.0b with 1024 message buffers each |
| DMA Channels | 8 dedicated (USB, Ethernet, CAN) |
| ADC | 16-channel 10-bit 500 ksps |
| Timers | 5 x 16-bit + 2 x 32-bit |
| UART / SPI / I2C | 6 / 3 / 4 (peripherals) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant (Lead Free) |
PIC32MX775F512H-80I/MR 64-vqfn (9x9 mm) Pin Configuration Guide
Pin configuration for PIC32MX775F512H-80I/MR (64-vqfn (9x9 mm) 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 PIC32MX775F512H-80I/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX775F512H-80I/MR is suitable for 6 applications: Industrial Ethernet Gateway, USB Device/Host Embedded Controller, CAN-based Automotive Network Node, Building Automation Controller, Embedded Web Server / IoT Bridge, Industrial Data Acquisition / Control.
Industrial Ethernet Gateway
The PIC32MX775F512H-80I/MR is well matched to industrial Ethernet gateways that bridge Modbus TCP, EtherNet/IP or PROFINET fieldbuses to internal control networks. The integrated 10/100 Ethernet MAC with MII and RMII interface drives a PHY with minimal external components, and the 80 MHz MIPS32 M4K core at 105 DMIPS runs Microchip's MPLAB Harmony TCP/IP stack with headroom for application logic. The 512 KB Flash holds a small web server and configuration UI, while 64 KB SRAM is sufficient for socket buffers. Two CAN 2.0b controllers let the same board terminate a CANopen or DeviceNet network, eliminating a separate gateway MCU.
Recommended
USB Device/Host Embedded Controller
The PIC32MX775F512H-80I/MR is ideal for USB device and host controllers thanks to its integrated USB 2.0 On-The-Go peripheral with integrated PHY, eliminating the need for an external transceiver. The dedicated DMA channel offloads USB traffic from the CPU, leaving the 80 MHz core available for class drivers and application code. Designers can implement mass storage, HID, CDC, or host MSC drivers using Microchip's USB stack. The 512 KB Flash stores HID reports, vendor descriptors, and dual-role switching logic, while the 8 KB of endpoint RAM handles multiple endpoints.
Recommended
CAN-based Automotive Network Node
The PIC32MX775F512H-80I/MR suits CAN-based automotive network nodes because of its two CAN 2.0b modules with 1024 message buffers each, which is enough buffering for body and powertrain message streams without CPU intervention. The 51 digital I/O pins connect to sensors, H-bridges, and lighting drivers. The 80 MHz MIPS32 M4K core handles OBD-II stacks and J1939 protocols at CAN bit rates up to 1 Mbit/s. The industrial -40C to +85C temperature grade covers most cabin and under-hood locations; for harsher locations designers upgrade to the MX795 AEC-Q100 variants.
Recommended
Building Automation Controller
The PIC32MX775F512H-80I/MR fits building automation controllers that require multiple communication standards simultaneously. The Ethernet MAC provides BACnet/IP connectivity to building management systems, while the two CAN modules handle BACnet MS/TP and proprietary HVAC buses. USB OTG allows local configuration via laptop, and 51 I/O drive relays, triacs, and 0-10 V analog outputs for HVAC actuators. The 80 MHz CPU runs a real-time scheduler and Modbus gateway, while 64 KB SRAM buffers trend logs between network events. The industrial temperature grade suits unheated mechanical rooms.
Recommended
Embedded Web Server / IoT Bridge
The PIC32MX775F512H-80I/MR serves as an embedded web server and IoT bridge because of its 512 KB Flash - large enough for an HTTP server, REST API handlers, MQTT client, and TLS handshake fragments. The 10/100 Ethernet MAC provides the primary connectivity, and the USB OTG port allows local device provisioning via mass storage emulation. Designers can host configuration web pages directly in Flash, eliminating external EEPROM. The 80 MHz CPU handles JSON parsing and AES acceleration in software without dropping TCP connections, and the 5-stage pipeline keeps response latency under 50 ms.
Recommended
Industrial Data Acquisition / Control
The PIC32MX775F512H-80I/MR is well-suited to industrial data acquisition and control applications thanks to its 16-channel 10-bit 500 ksps ADC, 51 digital I/O, 5 x 16-bit and 2 x 32-bit timers. The 8 DMA channels move ADC samples into SRAM without CPU intervention, freeing the 80 MHz core to run control loops, FFT analysis, or Modbus handlers. The 64 KB SRAM captures 8 k samples per DMA buffer at full ADC throughput, enough for vibration or power-quality monitoring. The Ethernet MAC streams recorded waveforms to a host PC for post-processing, while the two CAN modules report faults to a supervisory controller.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX775F512H-80I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX675F512H-80I/MR | PIC32MX764F128HT-I/MR | PIC32MX695F512H-80I/MR |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same |
| Maximum CPU Clock | 80 MHz (105 DMIPS) | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 512 KB | 512 KB | 128 KB (-75%) | 512 KB |
| SRAM | 64 KB | 64 KB | 32 KB | 64 KB |
| CAN Modules | 2 | 1 (-50%) | 2 | 0 (no CAN) |
| Ethernet MAC | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) |
| USB OTG | Yes (integrated PHY) | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Two CAN 2.0b controllers with 1024 message buffers each (vs PIC32MX675F512H-80I/MR)
- Higher Flash density for richer application code (vs PIC32MX764F128HT-I/MR)
- Includes CAN peripheral where hardware is reduced (vs PIC32MX695F512H-80I/MR)
Design Notes
The 64-VQFN (9x9 mm) package exposes a central paddle that must be soldered to a continuous ground plane for electrical performance and thermal dissipation. The Microchip AN1429 application note recommends 8-12 thermal vias in the exposed pad connected to inner ground planes to reduce junction-to-ambient thermal resistance. Place the 8 MHz primary crystal within 1 cm of OSC1/OSC2 pins with a guard ring tied to analog ground; otherwise EMI from the MCU core couples into the oscillator and degrades USB and Ethernet jitter performance.
PIC32MX775F512H-80I/MR requires a regulated 3.3 V supply with a tolerance of +/-5% (2.3-3.6 V absolute). The MCU has separate analog and digital VDD pins (AVDD, AVDD2, VDDCORE for the 1.8 V internal regulator). Decouple each AVDD pin with 10 uF + 100 nF, and place a ferrite bead between digital and analog supply planes. Estimated: at 80 MHz core with USB and Ethernet active, the total supply current can reach 80 mA; verify the LDO has at least 200 mA headroom for transient loading.
Do not confuse the 64-VQFN (9x9) package option (/MR suffix) with the 64-TQFP (10x10) (/PT suffix); pinouts differ and PCB layouts are not interchangeable. Also avoid confusing -80I/MR (industrial -40 to +85C) with -80V/MR (extended -40 to +105C) - both share the package, but the 'I' version is the standard industrial grade used here. The 80 MHz speed grade parts require the PLL configuration in config bits to be set correctly; the default config bits are 8 MHz with PLL disabled, which prevents the CPU from running at 80 MHz after reset.
The USB 2.0 OTG peripheral requires a 48 MHz clock derived from the primary oscillator via the PLL. Layout the USB D+/D- traces as a 90-ohm differential pair with no stubs, length-matched to within 150 mil. Add a common-mode choke near the connector if the design must pass EN 55022 radiated emissions. The Ethernet RMII signals should be length-matched to within 1 inch and routed away from switching power inductors; the MII interface (up to 25 signals) is more demanding and requires source-series termination.
Compliance Information
RoHS compliant per Microchip product page; lead-free VQFN package. Not AEC-Q100 qualified - this is industrial-grade, not automotive-qualified. For automotive designs, Microchip offers AEC-Q100 qualified MX7 variants under different ordering suffixes.
