PIC32MX775F256L-80V/PT - 80MHz 256KB Flash MCU w/ USB-OTG | Microchip
MPN: PIC32MX775F256L-80V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.04 | $4.04 |
| 10 | $3.8 | $38.00 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.75 | $2,750.00 |
PIC32MX775F256L-80V/PT Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, peripherals, and I/O on a single silicon die. The PIC32MX7 family is a high-performance MIPS32 M4K-based MCU line from Microchip's PIC32 portfolio, positioned between the PIC32MX5 (no USB-OTG) and PIC32MX6 sub-families. Within the broader taxonomy it belongs to: 32-bit MCU -> MIPS32 MCU -> PIC32 family -> PIC32MX7xx sub-family -> PIC32MX775F256L. This hierarchy helps engineers locate compatible parts within Microchip's PIC32 catalog.
Key features include 8 dedicated DMA channels for USB-OTG, Ethernet, and CAN peripherals, a 5-stage Harvard pipeline, and 83 programmable I/O lines. Peripherals include a 10-bit 1 Msps ADC (16 channels), five 16-bit timers/counters, five input-capture and five output-compare modules, and a Parallel Master Port for off-chip memory expansion. An industrial-grade -40C to +105C operating range is supported via the -80V speed grade.
Technical depth: the M4K core executes one instruction per cycle with single-cycle hardware multiply, reaching 105 DMIPS at 80 MHz. The on-chip 256 KB Flash is single-cycle accessible from the prefetch buffer, while 64 KB SRAM supports unified program/data access. The integrated 10/100 MAC offloads TCP/IP processing, leaving the CPU free for application logic. Dedicated DMA channels remove CPU intervention from USB, Ethernet, and CAN transfers, reducing interrupt load in networked real-time systems.
Typical applications include industrial Ethernet gateways, USB-OTG device/host controllers, automotive CAN nodes (non-safety), connected HMI panels with parallel LCD, and multi-protocol embedded routers. The dual-CAN capability also supports CANopen and DeviceNet bridges.
Design consideration: route the 80 MHz traces as impedance-controlled length-matched pairs, and place the 12 MHz crystal within 10 mm of the OSCI/OSCO pins to meet USB-OTG jitter spec.
This page synthesizes verified distributor pricing, true drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC32MX775F256L-80V/PT — 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 PIC32MX775F256L-80V/PT (same form factor and footprint) — differing in ADC, CAN, Package, USB, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX775F256L-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX775F256LT-80V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX775F256L-80V/PF
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →PIC32MX695F512L-80V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX675F512L-80V/PT
✅ Drop-In✓ In Stock
$6.74 / Unit
View Datasheet →PIC32MX575F512L-80V/PT
✅ Drop-In✓ In Stock
$9.05 / Unit
View Datasheet →PIC32MX775F256L-80V/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K |
| Core Width | 32-bit |
| Maximum Clock Frequency | 80 MHz |
| Performance | 105 DMIPS |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 64 KB |
| Operating Supply Voltage | 2.3 V to 3.6 V |
| USB | USB 2.0 OTG with integrated PHY |
| Ethernet | 10/100 MAC with MII/RMII |
| CAN | 2 x CAN 2.0b |
| DMA Channels | 8 dedicated (USB/Ethernet/CAN) |
| ADC | 10-bit, 16 channels, 1 Msps |
| I/O Pins | 83 |
| Timers | 5 x 16-bit |
| Input Capture / Output Compare | 5 / 5 |
| Package | 100-pin TQFP (12x12 mm) |
| Operating Temperature | -40C to +105C |
| Mounting Type | Surface Mount |
| Speed Grade | 80V (80 MHz) |
| RoHS Status | Compliant |
PIC32MX775F256L-80V/PT 100-pin tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for PIC32MX775F256L-80V/PT (100-pin tqfp (12x12 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 PIC32MX775F256L-80V/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX775F256L-80V/PT is suitable for 6 applications: Industrial Ethernet Gateway, USB-OTG Device/Host Controller, Dual-CAN Industrial Bridge, Connected HMI Panel with Parallel LCD, Multi-Protocol Embedded Router, Industrial Sensor Hub with Ethernet Backhaul.
Industrial Ethernet Gateway
The PIC32MX775F256L-80V/PT is an ideal drop-in for industrial Ethernet gateways because it combines a 10/100 MAC with MII/RMII and a 5-stage Harvard pipeline running at 80 MHz/105 DMIPS. The 256 KB Flash holds a TCP/IP stack (lwIP or Microchip's MPLAB Harmony Net) plus application logic, while 64 KB SRAM sustains dual Ethernet buffers. The integrated MAC removes the need for an external PHY controller companion IC; designers only add a PHY such as the KSZ8041 or DP83848 plus the magnetics. Compared with external MAC + MCU solutions, the PIC32MX775F256L-80V/PT cuts BOM cost and PCB area, and the 8 dedicated DMA channels offload packet transfers so the CPU can run a real-time protocol converter (Modbus TCP to RTU, EtherNet/IP to CANopen). 83 programmable I/O lines leave enough headroom for status LEDs, keypad inputs, and an RS-485 transceiver.
Recommended
USB-OTG Device/Host Controller
With USB 2.0 On-The-Go and an integrated PHY, the PIC32MX775F256L-80V/PT acts as a USB device, host, or dual-role port in embedded products. The integrated PHY eliminates the external transceiver that competing MCUs require, reducing both BOM and PCB footprint. The 80 MHz / 105 DMIPS core easily runs USB class drivers (CDC, HID, MSD, audio) from MPLAB Harmony, and the dedicated DMA channel for USB offloads packet copy operations, freeing CPU cycles for the application. The 256 KB Flash is sufficient for full USB host stacks supporting mass-storage devices; 64 KB RAM is enough for typical buffer pools. A typical application is a portable data logger that operates as a USB device (to dump logs to PC) and as a USB host (to read thumb drives in the field), all on the same MCU in a 100-pin TQFP.
Recommended
Dual-CAN Industrial Bridge
The PIC32MX775F256L-80V/PT's two independent CAN 2.0b controllers each with 1024 message buffers make it a strong fit for CAN-to-CAN, CAN-to-Ethernet, or CAN-to-USB bridges. Per Microchip's PIC32MX5XX/6XX/7XX datasheet (DS60001156K), each CAN module has its own DMA channel, eliminating CPU intervention for bus arbitration and message acceptance filtering. The 80 MHz core sustains 1 Mbit/s CAN throughput on both buses simultaneously while running a stack such as CANopen or DeviceNet on top. 256 KB Flash accommodates the stack libraries plus a small RTOS; 64 KB RAM is sufficient for two CAN buffers plus an Ethernet or USB pipe. Typical deployment is a gateway inside a CNC machine that forwards CANopen commands from the controller to remote drives and exposes them on a Modbus TCP server.
Recommended
Connected HMI Panel with Parallel LCD
For HMI panels driving a parallel TFT or character LCD, the PIC32MX775F256L-80V/PT exposes a Parallel Master Port (PMP) capable of addressing external graphics memory, and the 80 MHz/105 DMIPS core refreshes QVGA displays without DMA saturation. The 83 I/O pins comfortably route PMP data/control plus resistive touch (via ADC), five PWM backlight control channels, and the USB/Ethernet/CAN peripherals. The integrated 10-bit 1 Msps ADC (16 channels) reads four-wire touch screens without an external touch controller, while 256 KB Flash holds a small graphics library and UI state machine. Designers benefit from a single-chip HMI controller: no companion graphics MCU, no external ADC, and the same chip provides network connectivity for IoT-enabled panels.
Recommended
Multi-Protocol Embedded Router
The combination of USB-OTG, 10/100 Ethernet MAC, and dual CAN makes the PIC32MX775F256L-80V/PT well suited as a multi-protocol router bridging automotive, industrial, and IP networks. The 105 DMIPS MIPS32 M4K core can simultaneously forward packets between any two of the three interfaces with sustained throughput, and 8 dedicated DMA channels keep the bus fabric from becoming the bottleneck. 256 KB Flash accommodates a routing table and protocol stacks, while 64 KB RAM holds connection state. Use cases include home-energy gateways that aggregate solar inverter CAN traffic and forward it to a cloud server over Ethernet, or production-line routers that bridge Modbus TCP on Ethernet to CANopen on the factory bus. The 100-pin TQFP exposes all three peripheral sets without requiring a companion controller.
Recommended
Industrial Sensor Hub with Ethernet Backhaul
The PIC32MX775F256L-80V/PT integrates a 16-channel 10-bit 1 Msps ADC that reads arrays of analog sensors (temperature, pressure, vibration) and forwards aggregated readings over Ethernet or CAN to a supervisory PLC. At 80 MHz/105 DMIPS, the core can run a 1 kHz control loop sampling 8 ADC channels and pushing filtered values over Ethernet at 100 Hz without timing margin issues. The dual CAN ports allow daisy-chaining sensors on the factory floor while an Ethernet uplinks to a SCADA system, eliminating a separate gateway. The 256 KB Flash holds a real-time OS plus the sensor-driver library, and 64 KB RAM is enough for sample buffers. Designers benefit from the -40C to +105C temperature range and the 5-stage pipeline that delivers deterministic interrupt latency for time-critical sampling.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX775F256L-80V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX775F256L-80I/PT | PIC32MX775F256LT-80V/PT | PIC32MX775F256L-80V/PF | PIC32MX695F512L-80V/PT | PIC32MX675F512L-80V/PT | PIC32MX575F512L-80V/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (12x12 mm) | 100-TQFP (12x12 mm) - same | 100-TQFP (12x12 mm) - same | 100-TQFP (14x14 mm) - same die, larger footprint | 100-TQFP (12x12 mm) - same | 100-TQFP (12x12 mm) - same | 100-TQFP (12x12 mm) - same |
| Core Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 512 KB (+100%) | 512 KB (+100%) |
| RAM | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB (+100%) | 64 KB | 64 KB |
| USB-OTG | Yes (integrated PHY) | Yes (integrated PHY) | Yes (integrated PHY) | Yes (integrated PHY) | Yes (integrated PHY) | Yes (integrated PHY) | No (MX5 sub-family lacks USB-OTG) |
| Ethernet MAC | 10/100 with MII/RMII | 10/100 with MII/RMII | 10/100 with MII/RMII | 10/100 with MII/RMII | 10/100 with MII/RMII | 10/100 with MII/RMII | 10/100 with MII/RMII |
| CAN 2.0b Controllers | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Temperature | -40C to +105C (-80V grade) | -40C to +85C (-80I grade) | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
Key Differentiators
- Largest memory in PIC32MX775 variant line (vs PIC32MX775F256L-80I/PT)
- Same-package upgrade path to 512 KB Flash (vs PIC32MX695F512L-80V/PT)
- Extended -40C to +105C temperature range (vs PIC32MX775F256L-80I/PT)
- Compact 100-pin TQFP (12x12 mm) option (vs PIC32MX775F256L-80V/PF)
Design Notes
Place the 12 MHz primary crystal within 10 mm of the OSCI (pin 23) and OSCO (pin 24) pins and keep the trace lengths matched within 1 mm to meet USB-OTG jitter spec. Provide a ground guard ring around the crystal can and route its traces over a continuous ground plane to avoid radiated EMI that could couple into the USB differential pair. The PIC32MX775F256L-80V/PT also requires a 32.768 kHz secondary crystal on SOSCI/SOSCO pins for the RTCC; both crystals must be referenced to analog ground (AGND) and decoupled with 100 nF X7R ceramics placed within 2 mm of each VDD pin pair.
Route the USB D+ and D- traces as a 90-ohm differential pair with length matching better than 150 mil, and route the RMII Ethernet signals (ETXD0-1, ERXD0-1, EREF_CLK, EMDC, EMDIO, ECRS_DV) as impedance-controlled traces within 50 mm of the connector. The 100-pin TQFP (12x12 mm) package has center-pad-style thermal behavior; ensure at least four vias under the exposed thermal pad (if present) to a bottom-side ground pour to keep junction-to-ambient theta_JA within datasheet limits at 80 MHz. Keep JTAG TMS/TCK/TDO/TDI traces under 100 mm to ensure MPLAB ICD 4 debug reliability.
The PIC32MX775F256L-80V/PT requires a clean 3.3V rail; the core draws approximately 60 mA at 80 MHz while the USB PHY pulls an additional 25 mA during active USB traffic. Decouple each VDD/VDDC pair with a 100 nF X7R plus a 10 uF bulk capacitor; place the 100 nF caps within 2 mm of the pins. The analog supply AVDD powers the ADC and must be filtered with a ferrite bead plus 10 uF/100 nF decoupling to avoid ADC noise coupling from the digital rail. Per the Microchip datasheet DS60001156K, VDDC (core) requires an additional 1 uF + 100 nF pair; the part will not start reliably if VDDC droops below 2.5V during power-up.
Do not enable both the JTAG and Trace ports simultaneously on the same pins without configuring the JTAGEN bit correctly in DEVCFG0 - if left at default, MPLAB tools may fail to connect. For CAN designs, both CAN modules require external transceivers (e.g. TCAN334); connecting CANH/CANL directly to the MCU pins will damage the part. For USB-OTG host mode, ensure VBUS is sourced through a power switch (e.g. TPS2052B) that can be toggled by the MCU; the integrated PHY does not switch VBUS itself. Finally, the -80V speed grade supports up to +105C ambient but the 80 MHz performance is only guaranteed at 3.3V - reducing VDD to 2.5V requires dropping to the 60 MHz speed grade.
Estimated: at 80 MHz CPU clock with USB 2.0 OTG active, the digital switching noise on the 3.3V rail can reach 50 mV pk-pk if a single shared ferrite bead is used for AVDD and VDD. The recommended approach per Microchip is to use separate ferrite beads (e.g. BLM18PG471SN1D) for digital VDD and analog AVDD, with a star-ground at the regulator output. This was not a datasheet figure but is derived from typical PIC32MX7 designs; verify on prototype with a scope. For RMII Ethernet, the 50 MHz EREF_CLK trace must be length-matched to the data lines within 2 cm to avoid marginal PHY timing at 100 Mbit/s.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified (industrial-grade MCU, not automotive); for AEC-Q100 PIC32 options see PIC32MX1xx/2xx families.
