PIC32MX775F256LT-80V/PF - 80MHz 32-bit MCU, 256KB Flash, USB-OTG, 100-TQFP
MPN： PIC32MX775F256LT-80V/PF ✓ 啟用中PIC32MX775F256LT-80V/PF 概覽
A PIC32MX microcontroller is a 32-bit MIPS-based MCU that bridges 8/16-bit PIC legacy code with modern connected-embedded workloads. Within the taxonomy, it sits as: PIC32MX -> PIC32 family -> 32-bit MCU -> microcontroller -> semiconductor. These parts are widely used in industrial Ethernet nodes, USB peripherals, and CAN-connected sensor hubs where deterministic real-time behavior, deterministic interrupt latency, and rich connectivity peripherals are required in a single chip.
Key features include 256 KB single-cycle Flash with prefetch, 64 KB SRAM with DMA, hardware crypto engine (the F775 suffix implies AES/Random Number Generator availability on certain family members - confirm per datasheet revision), parallel master port, and five 16-bit timers. The 80 MHz core delivers 1.56 DMIPS/MHz (Dhrystone 2.1) and executes most instructions in one clock cycle, while the 10-bit ADC supports 1 Msps conversion with up to 16 analog inputs.
The PIC32MX775F256L architecture pairs an MIPS M4K pipeline with peripheral pin select via PPS, USB-OTG full-speed and high-speed (when paired with external PHY on related parts), and 10/100 Mbps Ethernet MAC. The device supports MPLAB Harmony, MPLAB X IDE, XC32 compiler, and Microchip's TCP/IP, USB, and graphics stacks. The F775 variant specifically integrates an Ethernet MAC plus dual CAN controllers plus USB-OTG, distinguishing it from lower-pinout PIC32MX3xx/4xx parts.
Typical applications include industrial Ethernet gateways, building automation controllers, USB-to-UART bridges with CAN diagnostics, point-of-sale terminals, medical patient monitors, and motor-control inverters with CANopen. The wide 2.3-3.6 V supply and extended industrial temperature make it attractive for factory-floor equipment.
Design consideration: place 0.1 uF decoupling capacitors on every VDD/VSS pair within 3 mm of the pins, route the 80 MHz crystal traces symmetrically with ground guard rings, and use MPLAB Harmony's free TCP/IP stack to shorten firmware time-to-market. For high-EMI environments, enable the on-chip FPLL jitter filter and gate unused peripherals via the peripheral clock control registers.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC32MX775F256LT-80V/PF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX775F256LT-80V/PF （相同外形與佔位） — 差異在於 ADC, DMA Channels, Package, USB, Core Architecture.
PIC32MX775F256L-80V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX695F512L-80V/BG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX675F512L-80V/BG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX775F256LT-80V/PF 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 80 MHz |
| Program Flash Memory | 256 KB |
| SRAM | 64 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| GPIO Pins | 51 |
| ADC | 10-bit, up to 16 channels, 1 Msps |
| USB | USB-OTG (full-speed) |
| CAN | 2x CAN 2.0B controllers |
| Ethernet | 10/100 Mbps MAC (requires external PHY) |
| DMA Channels | 8 |
| Timers | 5 x 16-bit, 2 x 32-bit |
| 工作溫度 | -40 C to +105 C (industrial, "V" grade) |
| 封裝 | 100-pin TQFP (14 x 14 mm), lead-free, 0.5 mm pitch |
| RoHS 狀態 | Compliant (lead-free) |
| Packing Format | Tape & Reel (LT suffix) |
PIC32MX775F256LT-80V/PF 100-pin tqfp (14 x 14 mm), lead-free, 0.5 mm pitch 腳位配置指南
PIC32MX775F256LT-80V/PF（100-pin tqfp (14 x 14 mm), lead-free, 0.5 mm pitch 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC32MX775F256LT-80V/PF.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX775F256LT-80V/PF 適用於 6 應用s: Industrial Ethernet Gateway, Building Automation Controller, USB-to-CAN Diagnostic Bridge, Medical Patient Monitor, POS Terminal Controller, Motor Control Inverter (CANopen).
Industrial Ethernet Gateway
The PIC32MX775F256LT-80V/PF is well suited to industrial Ethernet gateways because it integrates a 10/100 Mbps Ethernet MAC, dual CAN 2.0B controllers, and USB-OTG in a single 80 MHz MIPS core - all three interfaces in one die eliminates the need for a companion connectivity chip. The 64 KB RAM holds a TCP/IP socket buffer plus CANopen message queues for protocols such as Modbus TCP, EtherNet/IP, or PROFINET, while the 256 KB Flash fits Microchip's free MPLAB Harmony TCP/IP stack plus application logic. The 2.3-3.6 V supply tolerates noisy 24V-derived rails after regulation, and the -40 C to +105 C "V" grade covers unheated factory cabinets. Pair with an external PHY such as the KSZ8041 for a complete 2-port Ethernet-to-CAN bridge.
推薦
Building Automation Controller
Building automation controllers (BACnet, KNX, Modbus gateways) benefit from the PIC32MX775F256LT-80V/PF's combination of USB-OTG for commissioning, dual CAN for HVAC and elevator subsystems, and Ethernet for IP backbone connectivity. The 80 MHz core handles BACnet/IP routing and scheduling at acceptable latency, while the 16-channel 10-bit ADC at 1 Msps reads analog sensors (temperature, humidity, pressure) without external muxes. The 100-pin TQFP provides enough GPIO for relay outputs, keypad inputs, and segment-LCD driving. Microchip's free Harmony BACnet stack ports directly to this part.
推薦
USB-to-CAN Diagnostic Bridge
Automotive and industrial diagnostic tools commonly use USB-to-CAN bridges, and the PIC32MX775F256LT-80V/PF is purpose-built for this application. The USB-OTG controller presents a CDC or vendor-class interface to the host PC, while the dual CAN 2.0B controllers connect to OBD-II, CANopen, or DeviceNet networks simultaneously. The 80 MHz core runs the USB stack and CAN firmware with low interrupt latency, and the 64 KB RAM buffers high-speed CAN traffic at 1 Mbit/s without dropping frames. The -40 C to +105 C industrial temperature range suits automotive shop environments.
推薦
Medical Patient Monitor
Patient monitors, infusion pumps, and point-of-care diagnostic devices are increasingly connected via Ethernet and USB, and the PIC32MX775F256LT-80V/PF fits this profile. The 80 MHz MIPS core runs real-time vital-sign processing, the 10-bit ADC at 1 Msps captures ECG and SpO2 waveforms, and the Ethernet MAC enables HL7 or DICOM-over-IP connectivity to hospital networks. The USB-OTG port supports clinician-side data export or firmware update. The 64 KB RAM accommodates waveform buffers for at least one second of multi-lead ECG without external memory. Pair with a low-noise analog front-end such as the AD8232 for ECG.
推薦
POS Terminal Controller
Point-of-sale terminals require Ethernet for payment processing, USB for peripherals (barcode scanner, receipt printer, customer display), and serial/CAN for cash-drawer integration. The PIC32MX775F256LT-80V/PF consolidates all three interfaces into a single 100-pin TQFP MCU, reducing BOM cost and PCB area. The 256 KB Flash accommodates a TLS stack plus payment-application firmware, while the 64 KB RAM buffers transaction records and crypto operations. The -40 C to +105 C industrial range suits retail back-office and outdoor terminal deployments.
推薦
Motor Control Inverter (CANopen)
Variable-frequency drives (VFDs) and servo inverters for industrial motors commonly use CANopen for command/feedback, and the PIC32MX775F256LT-80V/PF's dual CAN 2.0B controllers are ideal for CANopen master or slave nodes. The 80 MHz core handles field-oriented control (FOC) loops at 10-20 kHz switching frequency with the 16-channel ADC sampling phase currents at 1 Msps. The Ethernet MAC adds IoT connectivity for remote monitoring, while USB-OTG supports firmware update and parameter tuning via PC tools. The 100-pin TQFP provides enough GPIO for gate-driver PWM outputs, encoder inputs, and protection signals.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX775F256LT-80V/PF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX775F256L-80V/PF | PIC32MX695F512L-80V/BG | PIC32MX675F512L-80V/BG |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-100 (PF), 14x14 mm, 0.5 mm pitch | TQFP-100 (PF), 14x14 mm, 0.5 mm pitch - identical | TQFP-100 (BG), 16x16 mm, 1.0 mm pitch - different footprint | TQFP-100 (BG), 16x16 mm, 1.0 mm pitch - different footprint |
| Core / Max Frequency | MIPS M4K, 80 MHz | MIPS M4K, 80 MHz | MIPS M4K, 80 MHz | MIPS M4K, 80 MHz |
| Flash / RAM | 256 KB / 64 KB | 256 KB / 64 KB | 512 KB / 128 KB | 512 KB / 128 KB |
| USB-OTG | Yes | Yes | Yes | Yes |
| CAN 2.0B Controllers | 2 | 2 | 2 | 2 |
| Ethernet MAC | 10/100 (external PHY) | 10/100 (external PHY) | 10/100 (external PHY) | 10/100 (external PHY) |
| Hardware Crypto Engine | No | No | Yes (AES + RNG) | No |
| Operating Temperature | -40 C to +105 C (V grade) | -40 C to +105 C (V grade) | -40 C to +105 C (V grade) | -40 C to +105 C (V grade) |
主要差異化特點
- Single-chip triple connectivity: USB-OTG + dual CAN + Ethernet MAC (對比PIC32MX575F256L-80V/PF)
- Doubles memory vs. lowest-tier MX3xx/MX4xx parts (對比PIC32MX450F256L-V/PF)
- Upgrade path to 512 KB Flash / 128 KB RAM in same family (對比PIC32MX695F512L-80V/BG)
- Industrial -40 C to +105 C operating range ("V" grade) (對比PIC32MX775F256L-80I/PF (I grade))
設計說明
Place a 0.1 uF decoupling capacitor within 3 mm of every VDD/VSS pair on the PIC32MX775F256LT-80V/PF. The 100-pin TQFP has multiple VDD pins (VDD, AVDD, VBUS, VBAT for the F-variant family) - each must have its own local decoupling. Add a bulk 10 uF tantalum or ceramic near the regulator to handle the 80 MHz core's transient current demands during DMA bursts. The Ethernet MAC's RMII clock (50 MHz) and USB 48 MHz clock are both derived from the primary oscillator and require clean supply rail decoupling.
Route the 80 MHz primary oscillator traces (between the crystal/oscillator and OSC1/OSC2 pins) as short, symmetric, impedance-controlled traces surrounded by a ground guard ring. Avoid routing any high-speed signals (USB D+/D-, Ethernet RMII, CAN bus) parallel to the oscillator traces. The 100-pin TQFP has pins on all four sides - use a 4-layer PCB with a dedicated ground plane beneath the MCU to provide a low-impedance return path for high-speed signals and to reduce EMI from the 80 MHz fundamental clock.
USB-OTG D+/D- traces on the PIC32MX775F256LT-80V/PF must be routed as a 90-ohm differential pair with matched length (within 150 mil). Add a 15 kohm pull-down on D+ and 15 kohm pull-up on D- for full-speed device detection, or use the internal pull-up/pull-down resistors controlled by firmware. For Ethernet RMII to the external PHY, route the 50 MHz reference clock, RX/TX data, and CRS_DV/CRS signals as matched-length traces. Terminate CAN bus with 120 ohm resistors at each end; route CANH/CANL as a twisted pair.
Estimated: the PIC32MX775F256LT-80V/PF at 80 MHz core clock with all peripherals active typically dissipates around 300-400 mW (3.3 V x 100-120 mA). The 100-pin TQFP has a theta_JA of approximately 40-50 C/W on a standard 4-layer JEDEC test board, giving a junction-to-ambient rise of 12-20 C above ambient at typical 100 mA load. Industrial-grade "V" parts rated to +105 C ambient have approximately 85-90 C headroom before thermal shutdown (typical internal shutdown at 150-160 C). For high-ambient (>85 C) enclosed designs, consider reducing core clock to 60 MHz or adding thermal vias beneath the exposed pad (where present on related parts).
Do not confuse the PIC32MX775F256LT-80V/PF with the F-variant PIC32MX775F512L-80V/PF - the part numbers are very similar but the F512 variant has 512 KB Flash / 128 KB RAM and the F256 has 256 KB / 64 KB. Also verify that JTAG (TMS, TCK, TDI, TDO) is correctly wired before power-up - mis-wired JTAG can sometimes brick the part or trigger unwanted code-execution at reset. Always enable the on-chip FPLL jitter filter in software (OSCCON<FRCDIV>) for EMI-sensitive applications, and gate unused peripherals via the peripheral clock control registers to save power.
合規資訊
Lead-free per the /PF suffix and "LEAD FREE" marking in the chip1stop datasheet snippet. RoHS and REACH compliance are standard Microchip policies. AEC-Q100 not applicable for industrial MCU - this part is not automotive-qualified. Halogen-free status not stated in the verified web data; default to unknown.
