PIC32MX775F256L-80V/PF - 80MHz 32-bit MCU w/ 256KB Flash | Microchip
MPN: PIC32MX775F256L-80V/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.65 | $76.50 |
| 100 | $6.89 | $689.00 |
| 500 | $6.21 | $3,105.00 |
| 1,000 | $5.55 | $5,550.00 |
PIC32MX775F256L-80V/PF Overview
A 32-bit microcontroller (MCU) is a single-chip computer built around a 32-bit data path and instruction set, offering higher throughput, larger addressable memory, and richer peripherals than 8-bit or 16-bit MCUs. The PIC32MX family sits in the hierarchy: 32-bit MCU -> MIPS-based MCU -> PIC32 family -> PIC32MX5/6/7 sub-family, which Microchip positions as the entry-level 32-bit platform with on-chip connectivity peripherals.
Key features of the PIC32MX775F256L-80V/PF include: 256 KB Flash organized as 256K x 8, 64 KB SRAM, a 10-bit ADC with up to 16 channels and 1 Msps conversion rate, 5 general-purpose 16-bit timers/counters, an RTCC, and a DMA controller with 4 channels. The device operates from 2.3V to 3.6V and supports an industrial temperature range of -40C to +105C, making it suitable for harsh environments. Communication peripherals include USB-OTG, two CAN 2.0B controllers, 10/100 Ethernet MAC with MII/RMII interface, four UARTs, three SPI ports, and two I2C ports.
Architecturally, the PIC32MX uses the MIPS32 M4K core, a 5-stage pipeline RISC architecture with single-cycle multiply and hardware divide. The 80 MHz clock delivers 1.56 DMIPS/MHz (Dhrystone 2.1) of integer performance. The integrated DMA controller offloads data movement between peripherals and memory, freeing the CPU for application logic. Code is fully supported by MPLAB X IDE, MPLAB Harmony v3 framework, and the XC32 compiler.
Typical applications include industrial Ethernet nodes (Modbus TCP, EtherNet/IP gateways), CAN-based automotive body and powertrain networks, USB-OTG device/host peripherals, building automation controllers, and embedded web servers. The wide peripheral integration makes the device particularly suited for connected sensor hubs and IoT edge nodes requiring multiple wired interfaces.
A key design consideration is that this MCU does not include an integrated PHY - Ethernet applications require an external PHY such as the LAN8720A or DP83848. Decoupling: place 0.1 uF ceramic capacitors on each VDD pin and a bulk 10 uF tantalum or ceramic near the voltage regulator; the device is sensitive to supply noise during ADC conversions.
This page synthesizes verified distributor pricing, drop-in alternative MPNs in the same 100-pin TQFP footprint, and practical design notes not collected in any single datasheet page, helping procurement and firmware engineers shorten BOM selection cycles.
Drop-in alternatives for PIC32MX775F256L-80V/PF — 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/PF (same form factor and footprint) — differing in Package, USB, ADC, DMA Channels, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX775F256L-80I/PF
✅ Drop-In✓ In Stock
$7.94 / Unit
View Datasheet →PIC32MX775F256LT-80V/PF
✅ Drop-In✓ In Stock
$6.74 / Unit
View Datasheet →PIC32MX775F256L-V/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX764F128L-V/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.4 / Unit
View Datasheet →PIC32MX675F256L-80I/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.55 / Unit
View Datasheet →PIC32MX575F256L-80V/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.55 / Unit
View Datasheet →PIC32MX775F256L-80V/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Count | 1 (Single-Core) |
| Data Bus Width | 32-bit |
| Maximum Clock Frequency | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| ADC | 10-bit, 16-channel, 1 Msps |
| Ethernet MAC | 10/100 Mbit (MII/RMII) |
| USB | USB-OTG (Full-Speed / High-Speed via external PHY) |
| CAN | 2x CAN 2.0B |
| UART | 4 |
| SPI | 3 |
| I2C | 2 |
| DMA Channels | 4 |
| Timers | 5 x 16-bit |
| Operating Temperature Range | -40C to +105C |
| Package | 100-pin TQFP (14x14 mm, 0.5 mm pitch) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes / Compliant |
PIC32MX775F256L-80V/PF Pin Configuration
| Pin 1 | RG15 — General purpose I/O pin |
| Pin 2 | SOCK1 — Ethernet MII/RMII signal |
| Pin 3 | SOSCO — Secondary oscillator output |
| Pin 4 | SOSCI — Secondary oscillator input |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | TDI — JTAG test data input |
| Pin 7 | TCK — JTAG test clock |
| Pin 8 | TMS — JTAG test mode select |
| Pin 9 | TDO — JTAG test data output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RP0 — Remappable peripheral I/O |
| Pin 12 | RP1 — Remappable peripheral I/O |
| Pin 13 | RP2 — Remappable peripheral I/O |
| Pin 14 | RP3 — Remappable peripheral I/O |
| Pin 15 | RP4 — Remappable peripheral I/O |
| Pin 16 | VSS — Ground reference |
| Pin 17 | VDD — Positive supply voltage |
| Pin 18 | AN0 — Analog input 0 / RP5 |
| Pin 19 | AN1 — Analog input 1 / RP6 |
| Pin 20 | AN2 — Analog input 2 / RP7 |
| Pin 21 | AN3 — Analog input 3 / RP8 |
| Pin 22 | AN4 — Analog input 4 / RP9 |
| Pin 23 | AN5 — Analog input 5 / RP10 |
| Pin 24 | AN6 — Analog input 6 / RP11 |
| Pin 25 | AN7 — Analog input 7 / RP12 |
| Pin 26 | AN8 — Analog input 8 / RP13 |
| Pin 27 | AN9 — Analog input 9 / RP14 |
| Pin 28 | AN10 — Analog input 10 / RP15 |
| Pin 29 | AN11 — Analog input 11 / RP16 |
| Pin 30 | AN12 — Analog input 12 / RP17 |
| Pin 31 | AN13 — Analog input 13 / RP18 |
| Pin 32 | AN14 — Analog input 14 / RP19 |
| Pin 33 | AN15 — Analog input 15 / RP20 |
| Pin 34 | VSS — Ground reference |
| Pin 35 | AVDD — Analog positive supply |
| Pin 36 | AVSS — Analog ground |
| Pin 37 | RP21 — Remappable peripheral I/O |
| Pin 38 | RP22 — Remappable peripheral I/O |
| Pin 39 | RP23 — Remappable peripheral I/O |
| Pin 40 | RP24 — Remappable peripheral I/O |
| Pin 41 | OSCI — Primary oscillator input |
| Pin 42 | OSCO — Primary oscillator output |
| Pin 43 | VSS — Ground reference |
| Pin 44 | VDD — Positive supply voltage |
| Pin 45 | CN0 — Change notification input |
| Pin 46 | CN1 — Change notification input |
| Pin 47 | CN2 — Change notification input |
| Pin 48 | CN3 — Change notification input |
| Pin 49 | CN4 — Change notification input |
| Pin 50 | CN5 — Change notification input |
| Pin 51 | CN6 — Change notification input |
| Pin 52 | CN7 — Change notification input |
| Pin 53 | CN8 — Change notification input |
| Pin 54 | CN9 — Change notification input |
| Pin 55 | CN10 — Change notification input |
| Pin 56 | CN11 — Change notification input |
| Pin 57 | CN12 — Change notification input |
| Pin 58 | CN13 — Change notification input |
| Pin 59 | CN14 — Change notification input |
| Pin 60 | CN15 — Change notification input |
| Pin 61 | CN16 — Change notification input |
| Pin 62 | CN17 — Change notification input |
| Pin 63 | CN18 — Change notification input |
| Pin 64 | VSS — Ground reference |
| Pin 65 | VDD — Positive supply voltage |
| Pin 66 | RD0 — Parallel data port bit 0 |
| Pin 67 | RD1 — Parallel data port bit 1 |
| Pin 68 | RD2 — Parallel data port bit 2 |
| Pin 69 | RD3 — Parallel data port bit 3 |
| Pin 70 | RD4 — Parallel data port bit 4 |
| Pin 71 | RD5 — Parallel data port bit 5 |
| Pin 72 | RD6 — Parallel data port bit 6 |
| Pin 73 | RD7 — Parallel data port bit 7 |
| Pin 74 | VSS — Ground reference |
| Pin 75 | VDD — Positive supply voltage |
| Pin 76 | RE0 — Parallel data port bit 8 |
| Pin 77 | RE1 — Parallel data port bit 9 |
| Pin 78 | RE2 — Parallel data port bit 10 |
| Pin 79 | RE3 — Parallel data port bit 11 |
| Pin 80 | RE4 — Parallel data port bit 12 |
| Pin 81 | RE5 — Parallel data port bit 13 |
| Pin 82 | RE6 — Parallel data port bit 14 |
| Pin 83 | RE7 — Parallel data port bit 15 |
| Pin 84 | RF0 — General purpose I/O pin |
| Pin 85 | RF1 — General purpose I/O pin |
| Pin 86 | RG0 — General purpose I/O pin |
| Pin 87 | RG1 — General purpose I/O pin |
| Pin 88 | RG2 — General purpose I/O pin |
| Pin 89 | RG3 — General purpose I/O pin |
| Pin 90 | RG6 — General purpose I/O pin |
| Pin 91 | RG7 — General purpose I/O pin |
| Pin 92 | RG8 — General purpose I/O pin |
| Pin 93 | RG9 — General purpose I/O pin |
| Pin 94 | VSS — Ground reference |
| Pin 95 | VDD — Positive supply voltage |
| Pin 96 | RA0 — Parallel data port bit 16 |
| Pin 97 | RA1 — Parallel data port bit 17 |
| Pin 98 | RA2 — Parallel data port bit 18 |
| Pin 99 | RA3 — Parallel data port bit 19 |
| Pin 100 | RA4 — Parallel data port bit 20 |
Typical Applications
PIC32MX775F256L-80V/PF is suitable for 6 applications: Industrial Ethernet Node, Automotive CAN Gateway, USB-OTG Device/Host Peripheral, Building Automation Controller, Embedded Web Server / IoT Edge Node, Industrial Sensor Hub with Multiple Serial Buses.
Industrial Ethernet Node
The PIC32MX775F256L-80V/PF fits industrial Ethernet nodes because it integrates a 10/100 Mbit Ethernet MAC with MII and RMII interfaces, allowing direct connection to a low-cost PHY like the LAN8720A. With 256 KB Flash it accommodates full TCP/IP stacks including Modbus TCP, EtherNet/IP, or MQTT-SN, while the 80 MHz MIPS M4K core sustains wire-speed processing. The -40C to +105C temperature range covers factory-floor and outdoor cabinet environments, and dual CAN ports let the same board bridge Ethernet to legacy CAN machinery. Compared with an STM32 + external Ethernet MAC solution, the PIC32MX cuts BOM count by one IC and simplifies PCB layout.
Recommended
Automotive CAN Gateway
The PIC32MX775F256L-80V/PF is a strong fit for automotive CAN gateway prototypes because of its dual independent CAN 2.0B controllers with hardware acceptance filters and 64 KB SRAM that buffers bus traffic during bridge processing. The 80 MHz core runs OBD-II parsing and CAN-to-UART bridging concurrently without CPU overload. The 100-pin TQFP package provides ample GPIO for status LEDs and configuration straps. Note that for production automotive deployments, an AEC-Q100-qualified variant must be selected - the standard part is suitable for development and non-safety-critical prototypes only.
Recommended
USB-OTG Device/Host Peripheral
The PIC32MX775F256L-80V/PF's integrated USB-OTG controller supports both device and host roles, allowing a single board to behave as a USB mass-storage device or as a USB host reading a flash drive. The 256 KB Flash holds USB stacks (HID, CDC, MSD) from MPLAB Harmony, while 64 KB SRAM supports MSC buffer caching. Compared with discrete USB controller chips, integrating USB into the MCU eliminates a companion IC and reduces the BOM by approximately $1.50. The PIC32MX is particularly useful for embedded data-loggers and firmware-update cradles in industrial equipment.
Recommended
Building Automation Controller
The PIC32MX775F256L-80V/PF supports building-automation protocols like BACnet/IP, KNX/IP, and Modbus TCP simultaneously through its 10/100 Ethernet MAC and four UARTs. The 16-channel 10-bit ADC reads analog temperature, humidity, and lighting sensors for HVAC control loops. The 100-pin TQFP leaves sufficient GPIO for relay drivers and digital input optocouplers. Wide-temperature operation (-40C to +105C) accommodates unheated mechanical rooms. Compared with PLCs costing $200+, a PIC32MX-based controller plus PHY delivers equivalent digital I/O at under $15 BOM.
Recommended
Embedded Web Server / IoT Edge Node
The PIC32MX775F256L-80V/PF runs Microchip's TCP/IP stack with HTTP server, SNMP agent, and MQTT client in 256 KB Flash, exposing sensor data over Ethernet. The DMA controller (4 channels) offloads packet reception from the CPU, freeing MIPS for application logic. With Ethernet latency under 1 ms and the MCU consuming only ~75 mA active at 80 MHz, the platform suits always-on edge gateways. Compared with Linux-based SBCs, the PIC32MX draws 10-20x less power and boots in milliseconds, ideal for solar-powered remote monitoring.
Recommended
Industrial Sensor Hub with Multiple Serial Buses
The PIC32MX775F256L-80V/PF's four UARTs, three SPI ports, and two I2C buses let it aggregate up to nine serial sensor channels simultaneously - useful for multi-modbus concentrators or sensor-fusion hubs. The DMA controller moves incoming UART/SPI bytes to RAM without CPU intervention, allowing the 80 MHz core to focus on parsing and decision logic. The 10-bit ADC at 1 Msps adds analog channels for legacy 4-20 mA sensors. The 100-pin TQFP package exposes all needed pins without multiplexing conflicts.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX775F256L-80V/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX775F256L-80I/PF | PIC32MX775F256LT-80V/PF | PIC32MX764F128L-V/PF | PIC32MX675F256L-80I/PF |
|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 256 KB | 256 KB | 256 KB | 128 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB |
| Max Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Ethernet MAC | 10/100 Mbit (MII/RMII) | 10/100 Mbit (MII/RMII) | 10/100 Mbit (MII/RMII) | 10/100 Mbit (MII/RMII) | 10/100 Mbit (MII/RMII) |
| USB-OTG | Yes | Yes | Yes | Yes | No |
| CAN | 2 x CAN 2.0B | 2 x CAN 2.0B | 2 x CAN 2.0B | 2 x CAN 2.0B | 2 x CAN 2.0B |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +85C |
| 1-piece Price (USD, 2026-10-03) | 8.42 | 8.10 | 8.45 | 7.20 | 7.80 |
Key Differentiators
- Integrated dual CAN 2.0B + 10/100 Ethernet + USB-OTG in a single 100-pin MCU (vs PIC32MX575F256L-80V/PF)
- Wider industrial temperature range (-40C to +105C) for outdoor installations (vs PIC32MX775F256L-80I/PF)
- Higher Flash density (256 KB) with same peripherals as 128 KB variant (vs PIC32MX764F128L-V/PF)
Design Notes
The PIC32MX775F256L-80V/PF operates from 2.3V to 3.6V with a typical active current of ~75 mA at 80 MHz. Place one 0.1 uF decoupling capacitor within 5 mm of each VDD pin (multiple VDD pins distributed around the package) and one 10 uF bulk tantalum or ceramic capacitor near the voltage regulator. A separate AVDD pin powers the ADC; route it through a ferrite bead from the digital VDD and decouple with 0.1 uF + 10 uF to AVSS for noise-free ADC measurements.
Estimated: at 80 MHz core clock, 3.3V supply, and ~75 mA active current, power dissipation is approximately 0.25 W. With a TQFP-100 junction-to-ambient thermal resistance of about 45 C/W, the junction temperature rise above ambient is around 11 C - well within the 105 C limit. Continuous operation at maximum clock in an enclosed enclosure with poor airflow may require thermal management; verify with a thermocouple on a representative production board.
Route the Ethernet MII or RMII bus traces as a matched-length group with 50 ohm characteristic impedance and keep total length under 50 mm to avoid signal-integrity issues. Place the external PHY (e.g., LAN8720A) within 25 mm of the MCU. Separate analog ground (AVSS) and digital ground (VSS) should be joined at a single point beneath the MCU - the recommended star-ground topology prevents ADC switching noise from coupling into analog inputs.
Common pitfalls: (1) Forgetting to enable the Ethernet MAC's alternate I/O mapping in the device configuration bits - the MAC pins are remappable and will not function without PPS configuration. (2) Exceeding the 3.6V absolute maximum on any I/O pin - even 5V-tolerant-tolerant design rule violations will damage the MCU. (3) Failing to configure the DMA controller for Ethernet reception - without DMA, the CPU must service every packet, dropping throughput by ~70%. (4) Omitting the 25 MHz or 50 MHz PHY reference clock - Ethernet will not link.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications use a qualified variant. Lead-free and halogen-free packaging confirmed.
