PIC32MX775F256L-80V/BG - 32-bit MCU 80MHz 256KB Flash | Microchip
MPN: PIC32MX775F256L-80V/BG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.91 | $9.91 |
| 10 | $9.12 | $91.20 |
| 100 | $8.27 | $827.00 |
| 500 | $7.41 | $3,705.00 |
| 1,000 | $6.55 | $6,550.00 |
PIC32MX775F256L-80V/BG Overview
Background: a 32-bit microcontroller (MCU) is a programmable processor-on-a-chip that integrates CPU core, Flash program memory, SRAM, and peripherals (timers, ADC, communication blocks). The PIC32MX family implements the MIPS32 M4K core, a Harvard-architecture RISC with 5-stage pipeline optimized for deterministic interrupt response. Within Microchip's portfolio, PIC32 sits between PIC16/PIC24 (lower pin counts, simpler peripherals) and the Cortex-M class (often faster cores, similar peripheral richness). It is best understood as: MCU -> 32-bit MCU -> MIPS MCU -> PIC32MX family -> connectivity class (Ethernet + USB-OTG + CAN).
Key features: 8-channel DMA, 16-bit parallel master port, 5 16-bit timers/capture/compare, two I2C, two SPI, four UART, USB-OTF 2.0 peripheral with integrated PHY, dual CAN 2.0b modules with 1024 message buffers, and a 10/100 Ethernet MAC with MII/RMII interfaces. The IC ships in 121-ball TFBGA (10x10 mm) and provides up to 83 I/O pins for mixed-signal or connectivity-heavy designs.
Technical depth: the M4K pipeline plus 8 dedicated DMA channels offload USB-OTG, Ethernet, and CAN traffic from the CPU, enabling deterministic throughput on the simultaneous-communication scenarios this part is designed for. The 16-bit PMP plus DMA simplifies connection to graphic controllers, external bus memories, or FPGA co-processors.
Typical applications: industrial Ethernet gateways, CAN/J1939 nodes, USB-OTG device/host controllers, embedded web servers, and motor-control HMIs. Design tip: ensure the BGA substrate via-in-pad microvia stack matches the 0.65 mm ball pitch; JTAG/Trace must be brought out for MPLAB ICD 3 / REAL ICE in-circuit debug.
Drop-in alternatives for PIC32MX775F256L-80V/BG — 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/BG (same form factor and footprint) — differing in DMA Channels, USB, Timers, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX675F512L-80V/BG
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →PIC32MX764F128L-V/BG
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX695F512L-80V/BG
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →PIC32MX775F256L-80V/BG Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (32-bit RISC, 5-stage pipeline) |
| Maximum CPU Frequency | 80 MHz |
| Performance | 105 DMIPS |
| Program Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Ethernet MAC | 10/100 Mbps with MII/RMII |
| USB | USB 2.0 OTG with integrated PHY |
| CAN | 2 x CAN 2.0b modules (1024 buffers total) |
| DMA Channels | 8 dedicated (USB, Ethernet, CAN) |
| Parallel Master Port | 16-bit PMP |
| Timers | 5 x 16-bit timer/capture/compare |
| UART / SPI / I2C | 4 UART, 2 SPI, 2 I2C |
| I/O Pins | 83 |
| Package | 121-TFBGA (10x10 mm) |
| Operating Temperature | -40C to +105C |
| RoHS Status | Compliant |
PIC32MX775F256L-80V/BG 121-tfbga (10x10 mm) Pin Configuration Guide
Pin configuration for PIC32MX775F256L-80V/BG (121-tfbga (10x10 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/BG.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX775F256L-80V/BG is suitable for 6 applications: Industrial Ethernet Gateway, Automotive CAN Node (Body/Chassis), USB-OTG Device/Host Controller, Embedded Web Server / IoT Edge Node, Motor Control HMI Front-End, Medical Device Data Logger.
Industrial Ethernet Gateway
The PIC32MX775F256L-80V/BG integrates a 10/100 Ethernet MAC with MII/RMII alongside dual CAN 2.0b and USB-OTG, making it ideal for industrial protocol gateways bridging Modbus TCP, EtherNet/IP, or PROFINET to CANopen or J1939 fieldbus networks. At 80 MHz / 105 DMIPS the MIPS M4K core runs Microchip's MPLAB Harmony TCP/IP stack with sufficient headroom for an RTOS or the application logic of a programmable logic controller. The 64 KB SRAM buffers TCP segments while the 8 dedicated DMA channels keep Ethernet, CAN, and USB traffic off the CPU, preventing jitter on the real-time fieldbus side.
Recommended
Automotive CAN Node (Body/Chassis)
Dual CAN 2.0b modules with a combined 1024-message buffer pool let the PIC32MX775F256L-80V/BG handle body or chassis CAN nodes where multiple buses coexist. The 80 MHz MIPS M4K core and 64 KB SRAM host OBD-II diagnostic stacks or CANopen DS402 device profiles, while the USB-OTG peripheral provides local logging via flash sticks during vehicle service. Its -40C to +105C industrial temperature range covers under-hood and cabin environments, though full automotive qualification would require a Q-graded variant.
Recommended
USB-OTG Device/Host Controller
The integrated USB 2.0 OTG peripheral with on-chip PHY lets the PIC32MX775F256L-80V/BG act as either a USB device (CDC, HID, MSD) or USB host (mass storage, HID dongles) without external transceivers. The 8-channel DMA architecture pumps USB endpoint buffers directly to SRAM, sustaining full USB full-speed throughput while the 80 MHz core runs application logic. A 256 KB Flash code budget comfortably fits the MPLAB Harmony USB framework, leaving room for application features.
Recommended
Embedded Web Server / IoT Edge Node
The PIC32MX775F256L-80V/BG can host a small embedded web server using MPLAB Harmony's TCP/IP stack, serving HTML configuration pages or REST APIs to Ethernet-attached clients. With 256 KB Flash and 64 KB SRAM, it fits lightweight HTTPS or CoAP servers alongside application logic, while the parallel master port (PMP) allows a small external SRAM or FRAM expansion for larger TLS certificate storage. The 80 MHz core provides enough MIPS for JSON parsing and small TLS handshakes with optimized libraries.
Recommended
Motor Control HMI Front-End
The PIC32MX775F256L-80V/BG works well as a human-machine interface front-end for variable-frequency drives, pairing its 80 MHz core with a graphic LCD via the 16-bit parallel master port (PMP). The 64 KB SRAM buffers display frames while the dual CAN channels handle the drive-side fieldbus (CANopen or DS402). USB-OTG enables service technicians to attach a flash drive for firmware updates without opening the cabinet, reducing field-service time on industrial installations.
Recommended
Medical Device Data Logger
The PIC32MX775F256L-80V/BG's 64 KB SRAM plus 256 KB Flash fits medical-device data loggers that buffer patient telemetry to removable USB storage while relaying real-time data over Ethernet to a central monitor. The 80 MHz MIPS M4K core runs the data acquisition loop and CSV/binary file writer, while USB-OTG hosts a flash drive for offline export. Note that medical safety certification (IEC 60601-1) requires full system qualification regardless of MCU choice, but the -40C to +105C industrial temperature range suits clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX775F256L-80V/BG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX675F512L-80V/BG | PIC32MX764F128L-V/BG | PIC32MX695F512L-80V/BG |
|---|---|---|---|---|
| Package | 121-TFBGA (10x10) | 121-TFBGA (10x10) - same | 121-TFBGA (10x10) - same | 121-TFBGA (10x10) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core / Frequency | MIPS32 M4K / 80 MHz / 105 DMIPS | MIPS32 M4K / 80 MHz / 105 DMIPS - same | MIPS32 M4K / 80 MHz / 105 DMIPS - same | MIPS32 M4K / 80 MHz / 105 DMIPS - same |
| Flash | 256 KB | 512 KB (+100%) | 128 KB (-50%) | 512 KB (+100%) |
| SRAM | 64 KB | 64 KB - same | 32 KB (-50%) | 64 KB - same |
| USB-OTG | Yes (integrated PHY) | Yes (integrated PHY) - same | No | No |
| CAN 2.0b Modules | 2 (1024 buffers) | 2 (1024 buffers) - same | 2 (1024 buffers) - same | 2 (1024 buffers) - same |
| Ethernet MAC | 10/100 MII/RMII | 10/100 MII/RMII - same | 10/100 MII/RMII - same | 10/100 MII/RMII - same |
| DMA Channels | 8 | 8 - same | 8 - same | 8 - same |
Key Differentiators
- USB-OTG with integrated PHY plus dual CAN plus Ethernet in one TFBGA (vs PIC32MX764F128L-V/BG)
- Same 80 MHz performance and DMA architecture as the larger 512 KB siblings (vs PIC32MX675F512L-80V/BG)
- Pin-compatible within the PIC32MX5/6/7XX BGA family (vs PIC32MX695F512L-80V/BG)
Design Notes
The 121-ball TFBGA uses a 0.65 mm ball pitch on a 10x10 mm body. Use via-in-pad microvias (drilled and copper-filled) under the BGA to escape the inner rows; the manufacturer package outline specifies NSMD (non-solder-mask-defined) pads. Plan at least 4 PCB layers (signal, ground, power, signal) and place a continuous ground plane beneath the IC to provide the reference for the Ethernet MII signals. Decoupling: 100 nF X7R ceramic at every VDDV pin, plus one 4.7 uF bulk per voltage domain within 5 mm of the ball.
The PIC32MX775F256L-80V/BG accepts 2.3 V to 3.6 V on its VDD rail, while an internal LDO generates 1.8 V for the core. Tie ENVREG high to use the internal regulator, or drive it low to supply an external 1.8 V source. Place a 10 uF + 0.1 uF pair on VDD and a separate 10 uF + 0.1 uF pair on the VCAP pin for the internal regulator's stability, following the family datasheet reference design. Avoid powering the digital I/O from the Ethernet PHY's analog supply to prevent digital switching noise coupling into MII.
Common mistakes: (1) omitting the JTAG pins TCK/TMS/TDI/TDO/TRST on the PCB - you cannot debug or program the part without them, and BGA rework to add a header is expensive; (2) routing the 50 MHz RMII clock with too much skew - keep RMII traces matched within 1 mm; (3) forgetting the USBOTG VBUS sense resistor divider when using host mode - USB OTG requires a 5 V regulator switched by the IC; (4) leaving the MCLR pin floating - it must be tied to VDD through a 10 kohm pull-up with a 100 nF to ground for in-circuit programming. Always check the family errata before locking the schematic.
At 80 MHz full activity with all peripherals enabled, typical core current is approximately 50-70 mA at 3.3 V. With 3.6 V worst-case, this is around 250 mW, well within the TFBGA's thermal envelope for industrial -40C to +105C ambient. In a sealed enclosure with no airflow, derate clock frequency to 60 MHz if the ambient exceeds 85C. The TFBGA's exposed die paddle should be soldered to a ground copper pour of at least 1 square inch for best thermal conductivity.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Industrial temperature grade -40C to +105C. AEC-Q100 automotive qualification not applicable for this industrial-grade orderable part; contact Microchip for automotive-grade orderable numbers.
