PIC32MX675F256HT-80I/MR - 80MHz 32-bit MCU w/ Ethernet | Microchip
料号： PIC32MX675F256HT-80I/MR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.42 | $11.42 |
| 10 | $10.39 | $103.90 |
| 100 | $9.05 | $905.00 |
| 500 | $8.12 | $4,060.00 |
| 1,000 | $7.32 | $7,320.00 |
PIC32MX675F256HT-80I/MR 概述
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit CPU core, volatile and non-volatile memory, and a rich set of on-chip peripherals such as timers, communication controllers, ADCs, and DMA engines. Within the broader taxonomy, MCUs sit under microprocessors (MPU -> MCU -> 32-bit MCU) and are part of the embedded computing category. The PIC32MX family specifically targets connectivity-rich embedded applications, including industrial control, consumer devices, and networked embedded products. This particular PIC32MX675F256HT-80I/MR sits at the high end of the PIC32MX5/6/7 series, distinguished by its on-chip 10/100 Mbit Ethernet MAC and full-speed USB 2.0 controller.
Key features of the PIC32MX675F256HT-80I/MR include 256 KB Flash organized as 256K x 8, 64 KB RAM, eight DMA channels for low-CPU-overhead data movement, an integrated 10/100 Ethernet MAC with the necessary RMII/MII interface, USB 2.0 full-speed OTG/Friendly host-or-device controller, multiple UART/SPI/I2C peripherals, a 10-bit ADC of 16 channels, and a parallel master port for external bus expansion. The part operates from a 2.3 V to 3.6 V supply and is rated for the industrial -40C to +85C temperature range.
Architecturally, the PIC32MX675F256HT-80I/MR uses the MIPS32 M4K core with a 5-stage pipeline, hardware multiply/divide, and a single-cycle 32-bit ALU. Microchip's MPLAB Harmony framework supports the device with peripheral libraries, USB and TCP/IP stacks, and a graphical configuration tool. The Ethernet MAC connects directly to an external PHY (such as the Microchip KSZ8041) via RMII, eliminating the need for an external MAC. Eight DMA channels can service the ADC, SPI, UART, USB, and Ethernet peripherals in parallel, freeing the CPU for application logic.
Typical applications include industrial Ethernet gateways, networked sensor nodes, USB peripherals, building automation controllers, and embedded web servers. The combination of Ethernet, USB, 256 KB Flash, and 64 KB RAM is well matched to small RTOS-based designs running TCP/IP stacks.
When designing with this MCU, place the 64-pin VQFN exposed pad on a sufficiently large copper pour for thermal relief, since industrial Ethernet applications often run near 80 MHz. The Ethernet MAC requires an external 50 MHz reference clock input; ensure your PHY or oscillator circuit meets the RMII timing budget.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC32MX675F256HT-80I/MR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC32MX675F256HT-80I/MR （相同外形与封装尺寸） ——差异在于 ADC, I/O Pins.
快速对比工具——选择替代料号进行并排对比：
PIC32MX675F256H-80I/MR
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX675F256HT-V/MR
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX675F256HT-I/MR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX695F256HT-80I/MR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX764F256H-80I/MR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX575F256HT-80I/MR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX675F256HT-80I/MR 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| 数据总线宽度 | 32-bit |
| 最大时钟频率 | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| 工作温度 | -40C to +85C (industrial) |
| I/O Pins | 51 |
| DMA Channels | 8 |
| Ethernet MAC | 10/100 Mbit (RMII/MII) |
| USB | USB 2.0 Full-Speed OTG |
| ADC | 10-bit, 16 channels |
| 封装 | 64-pin VQFN (9x9 mm) with exposed pad |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC32MX675F256HT-80I/MR 引脚配置
| 引脚 1 | RP15/RD15 — Remappable I/O / Port D bit 15 |
| 引脚 2 | RP14/RD14 — Remappable I/O / Port D bit 14 |
| 引脚 3 | RP13/PMD13/RD13 — Remappable I/O / PMP data bit 13 / Port D bit 13 |
| 引脚 4 | RP12/PMD12/RD12 — Remappable I/O / PMP data bit 12 / Port D bit 12 |
| 引脚 5 | RP11/PMD11/RD11 — Remappable I/O / PMP data bit 11 / Port D bit 11 |
| 引脚 6 | RP10/PMD10/RD10 — Remappable I/O / PMP data bit 10 / Port D bit 10 |
| 引脚 7 | RP9/PMD9/RD9 — Remappable I/O / PMP data bit 9 / Port D bit 9 |
| 引脚 8 | RP8/PMD8/RD8 — Remappable I/O / PMP data bit 8 / Port D bit 8 |
| 引脚 9 | RP7/PMD7/RD7 — Remappable I/O / PMP data bit 7 / Port D bit 7 |
| 引脚 10 | RP6/PMD6/PRD6 — Remappable I/O / PMP data bit 6 / Port D bit 6 |
| 引脚 11 | RP5/PMD5/RD5 — Remappable I/O / PMP data bit 5 / Port D bit 5 |
| 引脚 12 | RP4/PMD4/RD4 — Remappable I/O / PMP data bit 4 / Port D bit 4 |
| 引脚 13 | RP3/PMD3/RD3 — Remappable I/O / PMP data bit 3 / Port D bit 3 |
| 引脚 14 | RP2/PMD2/RD2 — Remappable I/O / PMP data bit 2 / Port D bit 2 |
| 引脚 15 | RP1/PMD1/RD1 — Remappable I/O / PMP data bit 1 / Port D bit 1 |
| 引脚 16 | RP0/PMD0/RD0 — Remappable I/O / PMP data bit 0 / Port D bit 0 |
| 引脚 17 | AVDD — Analog positive supply |
| 引脚 18 | AVSS — Analog ground |
| 引脚 19 | VREF+ — ADC voltage reference positive input |
| 引脚 20 | VREF- — ADC voltage reference negative input |
| 引脚 21 | AN0/RB0 — Analog input 0 / Port B bit 0 |
| 引脚 22 | AN1/RB1 — Analog input 1 / Port B bit 1 |
| 引脚 23 | AN2/RB2 — Analog input 2 / Port B bit 2 |
| 引脚 24 | AN3/RB3 — Analog input 3 / Port B bit 3 |
| 引脚 25 | AN4/RB4 — Analog input 4 / Port B bit 4 |
| 引脚 26 | AN5/RB5 — Analog input 5 / Port B bit 5 |
| 引脚 27 | AN6/RB6 — Analog input 6 / Port B bit 6 |
| 引脚 28 | AN7/RB7 — Analog input 7 / Port B bit 7 |
| 引脚 29 | AN8/RB8 — Analog input 8 / Port B bit 8 |
| 引脚 30 | AN9/RB9 — Analog input 9 / Port B bit 9 |
| 引脚 31 | AN10/RB10 — Analog input 10 / Port B bit 10 |
| 引脚 32 | AN11/RB11 — Analog input 11 / Port B bit 11 |
| 引脚 33 | AN12/RB12 — Analog input 12 / Port B bit 12 |
| 引脚 34 | AN13/RB13 — Analog input 13 / Port B bit 13 |
| 引脚 35 | AN14/RB14 — Analog input 14 / Port B bit 14 |
| 引脚 36 | AN15/RB15 — Analog input 15 / Port B bit 15 |
| 引脚 37 | VSS — Digital ground |
| 引脚 38 | VDD — Digital positive supply 3.3V |
| 引脚 39 | OSC1/CLKI/RC15 — Crystal oscillator input / external clock input / Port C bit 15 |
| 引脚 40 | OSC2/CLKO/RC14 — Crystal oscillator output / clock output / Port C bit 14 |
| 引脚 41 | SOSCI/RP13/RC13 — Secondary oscillator crystal input / remappable I/O / Port C bit 13 |
| 引脚 42 | SOSCO/T1CK/RP12/RC12 — Secondary oscillator crystal output / Timer1 clock / Port C bit 12 |
| 引脚 43 | TMS/RA0 — JTAG Test Mode Select / Port A bit 0 |
| 引脚 44 | TCK/RA1 — JTAG Test Clock / Port A bit 1 |
| 引脚 45 | TDI/RA2 — JTAG Test Data In / Port A bit 2 |
| 引脚 46 | TDO/RA3 — JTAG Test Data Out / Port A bit 3 |
| 引脚 47 | RTCC/RA4 — Real-Time Clock Calendar output / Port A bit 4 |
| 引脚 48 | SDA2/RA5 — I2C2 data / Port A bit 5 |
| 引脚 49 | SCL2/RA6 — I2C2 clock / Port A bit 6 |
| 引脚 50 | MCLR — Master clear reset input (active low) |
| 引脚 51 | DPLL/RF6 — Digital PLL / Port F bit 6 |
| 引脚 52 | OC1/RD8 — Output Compare 1 / Port D bit 8 |
| 引脚 53 | IC1/RD9 — Input Capture 1 / Port D bit 9 |
| 引脚 54 | OC2/RD10 — Output Compare 2 / Port D bit 10 |
| 引脚 55 | IC2/RD11 — Input Capture 2 / Port D bit 11 |
| 引脚 56 | U2TX/RF5 — UART2 transmit / Port F bit 5 |
| 引脚 57 | U2RX/RF4 — UART2 receive / Port F bit 4 |
| 引脚 58 | U1TX/RF3 — UART1 transmit / Port F bit 3 |
| 引脚 59 | U1RX/RF2 — UART1 receive / Port F bit 2 |
| 引脚 60 | USBID/RF1 — USB ID / Port F bit 1 |
| 引脚 61 | VBUS/RF0 — USB VBUS detect / Port F bit 0 |
| 引脚 62 | VDD — Digital positive supply 3.3V (second pin) |
| 引脚 63 | VSS — Digital ground (second pin) |
| 引脚 64 | EP — Exposed thermal pad - connect to ground |
典型应用
PIC32MX675F256HT-80I/MR 适用于 6 应用s: Industrial Ethernet Sensor Gateway, USB HID / CDC Peripheral Device, Building Automation Controller, Embedded Web Server / IoT Edge Node, Networked Data Acquisition System, POS Terminal / Network Printer Controller.
Industrial Ethernet Sensor Gateway
The PIC32MX675F256HT-80I/MR is ideal for industrial Ethernet sensor gateways because it integrates a 10/100 Ethernet MAC that connects directly to an external PHY such as the Microchip KSZ8041 via RMII, eliminating the need for an external MAC controller. The 256 KB Flash hosts a small TCP/IP stack (Harmony or uIP), while 64 KB RAM accommodates buffers and a lightweight RTOS. Eight DMA channels handle Ethernet packet movement without CPU overhead. Operating temperature range of -40C to +85C makes it suitable for factory-floor installation, and the 64-pin VQFN exposed pad provides sufficient thermal relief for continuous 80 MHz operation.
推荐
USB HID / CDC Peripheral Device
For USB peripherals such as HID keyboards/mice, CDC virtual COM ports, or custom vendor-class devices, the PIC32MX675F256HT-80I/MR provides USB 2.0 full-speed OTG support and 51 GPIO pins for buttons, LEDs, and sensors. The on-chip USB controller includes an internal pull-up and on-chip transceiver, requiring only an external ESD protection array. The 80 MHz core processes USB stacks with comfortable headroom, and 64 KB RAM holds USB descriptor buffers plus application data. Engineers can pair it with the PIC32MX675F256HT-I/MR variant for industrial-grade USB peripherals.
推荐
Building Automation Controller
In building automation, the PIC32MX675F256HT-80I/MR serves as a centralized controller for HVAC, lighting, and access-control subsystems. Ethernet MAC provides BACnet/IP or Modbus TCP connectivity to the building management system, while multiple UART/SPI/I2C interfaces connect to sensor and actuator boards. The 16-channel 10-bit ADC reads temperature, humidity, and light sensors directly. The 256 KB Flash stores BACnet object tables, scheduling rules, and configuration; 64 KB RAM handles real-time scheduling.
推荐
Embedded Web Server / IoT Edge Node
The PIC32MX675F256HT-80I/MR can host a small embedded web server using Microchip's Harmony TCP/IP lite stack, providing browser-based configuration pages for industrial equipment. The Ethernet MAC enables HTTP and MQTT-over-TCP, while the USB port supports local debugging or Wi-Fi-dongle attachment. 256 KB Flash accommodates a static web interface plus API endpoints; 64 KB RAM handles socket buffers and the HTTP request parser. The exposed-pad VQFN-64 package keeps the BOM footprint compact for DIN-rail or wall-mount enclosures.
推荐
Networked Data Acquisition System
For multi-channel data acquisition with Ethernet upload, the PIC32MX675F256HT-80I/MR combines a 16-channel 10-bit ADC at up to 1 Msps with DMA-driven acquisition and Ethernet transmission. The eight DMA channels can simultaneously service the ADC, SPI to a front-end amplifier chain, and the Ethernet MAC, freeing the CPU to perform calibration and statistics. 256 KB Flash stores calibration tables and command-set firmware; 64 KB RAM provides sample buffers. Industrial temperature range supports use in field cabinets.
推荐
POS Terminal / Network Printer Controller
Point-of-sale terminals and networked receipt printers benefit from the PIC32MX675F256HT-80I/MR's combination of Ethernet, USB, and 51 GPIO. Ethernet handles payment-gateway communication, USB connects to peripherals like barcode scanners or NFC readers, and the GPIO bank drives thermal printer heads and customer displays. The 80 MHz MIPS32 M4K core processes XML-formatted receipt data, and the 64 KB RAM holds print buffers for rasterized line data without external memory expansion.
推荐
推荐产品汇总
工程参考数据： PIC32MX675F256HT-80I/MR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC32MX675F256H-80I/MR | PIC32MX675F256HT-V/MR | PIC32MX695F256HT-80I/MR | PIC32MX764F256H-80I/MR | PIC32MX575F256HT-80I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-64 (MR) 9x9 | VQFN-64 (MR) 9x9 - same | VQFN-64 (MR) 9x9 - same | VQFN-64 (MR) 9x9 - same | VQFN-64 (MR) 9x9 - same | VQFN-64 (MR) 9x9 - same |
| Core | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Max Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| RAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Ethernet MAC | Yes (10/100) | Yes (10/100) | Yes (10/100) | Yes (10/100) | Yes (10/100) | No |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG + Host | USB 2.0 FS OTG |
| CAN | No | No | No | Yes | No | No |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +105C (automotive) | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Integrated 10/100 Ethernet MAC eliminates external MAC chip （对比 PIC32MX575F256HT-80I/MR)
- Industrial temperature rating with tape-and-reel packaging （对比 PIC32MX675F256H-80I/MR)
- 8 DMA channels for off-CPU peripheral data movement （对比 PIC32MX764F256H-80I/MR)
设计说明
The 64-pin VQFN-64 (MR) package exposes a thermal pad (EP, pin 64) that MUST be soldered to a continuous ground plane of at least 1 square inch of copper for reliable thermal relief. At 80 MHz operation with all peripherals active, the device dissipates approximately 0.5 W internally; without adequate copper, junction temperature can rise to unsafe levels especially at upper industrial temperature limits. Use thermal vias under the EP to connect to inner ground planes for improved heat spreading.
Place a 0.1 uF ceramic decoupling capacitor within 3 mm of each VDD pin (pins 38 and 62) plus a bulk 4.7 uF tantalum or ceramic near the supply entry point. The analog AVDD pin (pin 17) requires its own 0.1 uF + 10 uF filter network; if the ADC is unused, AVDD can be tied directly to VDD but VREF+ and VREF- should be bypassed. Use a ferrite bead between digital VDD and analog AVDD to reduce switching noise coupling into ADC measurements.
Route the Ethernet RMII signals (ECRS, ETXD0, ETXD1, ETXEN, ERXD0, ERXD1, ERXDV, EREFCLK, EMDC, EMDIO) as a matched-length bus within 2 mm of each other on the same routing layer. Keep the 50 MHz reference clock trace to the PHY less than 25 mm and surround it with ground. The USB DP/DM traces should be 90 ohm differential and routed to within 3 mm of the connector, with a common-mode choke and ESD array placed close to the connector.
The 80 MHz MIPS32 M4K core generates harmonics up to several hundred MHz; place a ferrite bead or pi-filter on each supply rail entering the MCU section to prevent noise injection back into analog circuits. For Ethernet applications, the RMII bus and the 50 MHz reference clock are the most EMI-sensitive nets - keep them short and isolated from switching power and clock traces.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm resistor and add a 100 nF cap to ground for reset debouncing. When using the Ethernet MAC, the 50 MHz reference clock must be enabled BEFORE the MAC is configured in software, otherwise the MAC will not bring up the link. Also ensure the oscillator startup delay is respected after a power-on reset before configuring peripherals, especially the USB controller which requires a stable clock within 100 ppm.
合规信息
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified in the standard -I variant; the automotive -V variant (PIC32MX675F256HT-V/MR) is AEC-Q100 qualified. Lead-free and halogen-free package per datasheet ordering information.
