PIC32MX795F512LT-80I/PT - 80MHz 32-bit MCU 512KB Flash 100-TQFP | Microchip
MPN： PIC32MX795F512LT-80I/PT ✓ 啟用中PIC32MX795F512LT-80I/PT 概覽
A 32-bit microcontroller is an integrated circuit that combines a microprocessor core, program and data memory, and a rich set of peripherals (timers, communication controllers, ADC) onto a single die. Microcontrollers sit at the top of the embedded computing hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC32MX family uses the MIPS32 instruction set, providing deterministic interrupt latency and broad C-language tool support through MPLAB XC32 and MPLAB Harmony frameworks.
Key features of the PIC32MX795F512LT-80I/PT include 16 KB of instruction cache, prefetch module, 8-channel DMA, up to 85 general-purpose I/O pins, six UART modules, five I2C and four SPI peripherals, a 16-channel 10-bit ADC, five 16-bit timers/counters, and an internal 8 MHz / 32 kHz oscillator pair with PLL multiplication to 80 MHz. The device operates from 2.3 V to 3.6 V, suitable for battery-backed and USB-powered nodes.
Architecturally, the M4K core delivers 1.56 DMIPS/MHz and supports both MIPS16e code compression and microMIPS mode, halving Flash footprint for compact applications. The integrated Ethernet MAC, USB-OTG PHY interface, and dual CAN modules remove the need for external connectivity ICs in industrial gateways, automotive body controllers, and audio streaming devices.
Typical applications include industrial Ethernet nodes, USB peripherals, CAN-based automotive ECUs, IoT gateways, and audio streaming appliances. The wide peripheral mix also suits medical data loggers and graphical HMI panels using an external display controller.
When designing with this device, allocate sufficient PCB area for the 12x12 mm TQFP footprint and follow Microchip's 100-pin TQFP PIM hardware checklist to preserve signal integrity on USB and Ethernet differential pairs. Use the MPLAB Harmony configurator for clock tree setup and pin assignment to avoid manual register mistakes.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including parametric proximity scores and cross-brand pin-compatible replacements verified against the Microchip PIC32MX5/6/7 family datasheet.
直接替換替代品，適用於 PIC32MX795F512LT-80I/PT — 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： PIC32MX795F512LT-80I/PT （相同外形與佔位） — 差異在於 Package, USB, Core Architecture, ADC, CAN.
PIC32MX795F512L-80I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX795F512LT-80I/BG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX775F512LT-80I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX775F256L-80V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX695F512L-80I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX675F512L-80V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX575F512L-80V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX795F512LT-80I/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K |
| CPU Bit Width | 32-bit |
| Maximum CPU Speed | 80 MHz |
| Flash Program Memory | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Instruction Cache | 16 KB |
| 供應電壓 | 2.3 V to 3.6 V |
| I/O Pins | 85 |
| Ethernet MAC | 10/100 Mbit integrated |
| USB | USB On-The-Go (Host/Device) |
| CAN Modules | 2 x CAN 2.0b |
| UART | 6 |
| I2C | 5 |
| SPI | 4 |
| ADC | 16-channel 10-bit |
| Timers | 5 x 16-bit |
| DMA Channels | 8 dedicated |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 100-pin TQFP (PT), 12x12 mm |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant (lead-free) |
PIC32MX795F512LT-80I/PT 100-pin tqfp (pt), 12x12 mm 腳位配置指南
PIC32MX795F512LT-80I/PT（100-pin tqfp (pt), 12x12 mm 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： PIC32MX795F512LT-80I/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX795F512LT-80I/PT 適用於 7 應用s: Industrial Ethernet Gateway, USB-OTG Audio Streaming Device, Automotive CAN Gateway ECU, IoT Sensor Hub with Ethernet Backhaul, Medical Data Logger, Graphical HMI Control Panel, Point-of-Sale Terminal Controller.
Industrial Ethernet Gateway
The PIC32MX795F512LT-80I/PT is a strong fit for industrial Ethernet gateways because its integrated 10/100 Mbit MAC, 128 KB SRAM, and 80 MHz MIPS32 M4K core can sustain TCP/IP and Modbus/TCP traffic without an external PHY controller. The 8-channel DMA engine offloads Ethernet buffer transfers, freeing the CPU to handle protocol stacks and Modbus polling. Compared with a discrete Ethernet + MCU approach, this part removes a chip from the BOM and simplifies the PCB. Designers should add a 25 MHz Ethernet PHY reference clock and follow Microchip's 100-pin TQFP PIM hardware checklist to keep RMII signals clean.
推薦
USB-OTG Audio Streaming Device
The PIC32MX795F512LT-80I/PT's USB On-The-Go controller, six UART/SPI peripherals, and 16-channel 10-bit ADC make it a natural fit for USB audio streaming appliances such as USB headsets and audio capture dongles. Its 128 KB SRAM provides comfortable buffer room for 48 kHz stereo PCM streams, while 512 KB Flash holds USB class drivers and DSP filters compiled under MPLAB Harmony. Designers can route the USB differential pair (D+/D-) directly to the on-chip USB transceiver, eliminating external PHY ICs.
推薦
Automotive CAN Gateway ECU
The PIC32MX795F512LT-80I/PT integrates two independent CAN 2.0b controllers, 85 GPIO, and an 80 MHz core, suiting it to automotive body and gateway ECUs that bridge CAN bus segments at 500 kbps or 1 Mbps. The dual CAN modules plus Ethernet MAC enable CAN-over-Ethernet tunneling for vehicle diagnostics. While the industrial temperature grade (-40 C to +85 C) handles most cabin applications, AEC-Q100 qualification is not claimed, so designers should select the automotive-grade PIC32MX variants for under-hood use.
推薦
IoT Sensor Hub with Ethernet Backhaul
The PIC32MX795F512LT-80I/PT works well as an IoT sensor hub aggregator combining Ethernet backhaul with on-chip 16-channel ADC and four SPI ports for digital sensors. Its 80 MHz core can poll multiple SPI sensor chains in parallel using DMA, while the Ethernet MAC uploads aggregated telemetry to MQTT brokers. Compared with low-end Cortex-M0+ parts, the PIC32MX795 offers more headroom for TLS libraries and OTA firmware updates within the 512 KB Flash budget.
推薦
Medical Data Logger
The PIC32MX795F512LT-80I/PT's 512 KB Flash and 128 KB SRAM allow buffering several hours of high-resolution patient telemetry, while the 16-channel 10-bit ADC samples analog physiological signals. The integrated Ethernet MAC streams stored logs to a hospital network or USB-OTG port exports to a clinician's laptop. The 2.3 V to 3.6 V supply range simplifies battery designs, and the industrial temperature grade supports clinical environments. Use the MPLAB Harmony TCP/IP stack for encrypted transport.
推薦
Graphical HMI Control Panel
The PIC32MX795F512LT-80I/PT's 85 GPIO can drive an external TFT controller and touchscreen over parallel 8080 or SPI interfaces, making it suitable for graphical HMI panels in industrial control. The 16 KB instruction cache keeps SPI display refresh responsive while the CPU runs control logic over UART/CAN. Compared with the PIC32MX470 (which lacks Ethernet/CAN), this part provides a complete connected-HMI solution in a single chip.
推薦
Point-of-Sale Terminal Controller
The PIC32MX795F512LT-80I/PT fits point-of-sale terminals needing USB peripherals (barcode scanner, receipt printer), Ethernet for back-office sync, and CAN or UART for cash-drawer interfaces. Its 512 KB Flash holds the embedded TLS stack and POS application; 128 KB SRAM supports transaction buffering. The wide supply voltage (2.3 V to 3.6 V) accommodates battery-backed operation during power events.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX795F512LT-80I/PT — 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 | PIC32MX795F512L-80I/PT | PIC32MX775F512LT-80I/PT | PIC32MX695F512L-80I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (PT) 12x12 mm | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same |
| CPU Core | MIPS32 M4K, 80 MHz | MIPS32 M4K, 80 MHz | MIPS32 M4K, 80 MHz | MIPS32 M4K, 80 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB |
| Ethernet MAC | 10/100 Mbit integrated | 10/100 integrated | 10/100 integrated | Not present |
| USB | USB On-The-Go | USB On-The-Go | USB On-The-Go | USB On-The-Go |
| CAN Modules | 2 x CAN 2.0b | 2 x CAN 2.0b | 2 x CAN 2.0b | 2 x CAN 2.0b |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
主要差異化特點
- Only PIC32MX7 sub-family with full Ethernet+USB+CAN connectivity in 100-pin TQFP (對比PIC32MX695F512L-80I/PT)
- Tap-and-reel packaging reduces assembly cost vs tray variant (對比PIC32MX795F512L-80I/PT)
- Maximum 128 KB SRAM in the PIC32MX5/6/7 family (對比PIC32MX575F512L-80V/PT)
設計說明
Route the 50-ohm RMII Ethernet differential pair (RG15/RG12 etc.) over a continuous ground reference and keep length matching within 50 mil. Place the 25 MHz PHY reference clock within 5 mm of the LAN8720A PHY and isolate it from noisy switching rails. Decouple every VDD/VSS pair with a 0.1 uF ceramic plus 10 uF bulk capacitor within 3 mm of the pin to comply with Microchip's 100-pin PIM hardware checklist.
Do not assume the internal 8 MHz oscillator is accurate enough for USB-OTG full-speed (12 MHz) or CAN 1 Mbps operation - configure the PLL so that the USB clock derives from a precision 48 MHz source and CAN uses a 10 MHz or 20 MHz base. Otherwise, jitter will exceed the USB-OTG spec and CAN bus errors will rise under load. Use MPLAB Harmony Clock configurator to lock the PLL correctly.
Estimated: at 80 MHz full CPU load and 3.3 V VDD, the PIC32MX795F512LT-80I/PT consumes roughly 70 mA (230 mW). The 100-pin TQFP has theta_JA around 50 C/W on a 2-layer PCB, giving a 12 C junction rise above ambient. For closed enclosures, expand to 4-layer with a ground pour and provide airflow if the design also drives 85 GPIO at high toggle rates.
Keep the ICSP programming pins PGEC1/PGED1 (RG6/RG7) accessible and unbuffered for in-circuit programming with MPLAB ICD 4 or PICkit 4. If your PCB layout requires ESD protection, place the ESD diode array on the connector side and not in series with the ICSP pins, otherwise debug access fails. Reserve a 6-pin header footprint even on production boards.
合規資訊
Lead-free TQFP package per Microchip product page; industrial temperature grade only - not AEC-Q100 qualified. For automotive ECUs, use AEC-Q100 qualified PIC32MX variants.
