PIC32MX675F256H-80V/PT - 80MHz 32-bit MCU USB-OTG Ethernet 256KB | Microchip
MPN： PIC32MX675F256H-80V/PT ✓ 啟用中PIC32MX675F256H-80V/PT 概覽
A 32-bit MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripherals. PIC32MX sits in Microchip's mid-range 32-bit family (lineage: PIC32MX -> PIC32 -> 32-bit MCU -> microcontroller -> embedded processor). It targets connectivity-rich embedded designs, sitting above 8-bit PIC16/PIC18 and below higher-end Cortex-M and Cortex-A parts, balancing performance, peripherals, and cost.
Key features include 51 digital I/O lines, a 16-channel 10-bit ADC at 1 Msps, four 16-bit timer/counters, two I2C, two SPI, two UART, and four dedicated DMA channels for USB OTG. The supply range is 2.3 V to 3.6 V (operating core 2.5 V to 3.6 V), industrial -40 C to +105 C operating temperature (V suffix), and JTAG/ICSP debug with trace. The 80V suffix denotes the 80 MHz speed grade and the V = -40 C to +105 C industrial extended temperature window.
Architecturally, the PIC32MX uses the MIPS M4K core, which executes most MIPS32 instructions in a single cycle and provides hardware multiply/divide and DSP extensions. Harvard architecture separates instruction and data paths, enabling simultaneous fetch and memory access. The dedicated DMA engine offloads USB OTG and memory-to-memory transfers from the CPU, freeing MIPS for application code.
Typical applications include industrial Ethernet gateways, USB-OTG device/host controllers, building automation nodes, and embedded web servers. The combination of integrated Ethernet MAC, USB OTG with PHY, and ample RAM makes this part well suited for connected appliances, point-of-sale terminals, and remote sensor concentrators. The V temperature grade supports outdoor and factory-floor deployments.
When designing with this MCU, allocate decoupling capacitors near each VDD/VSS pair, route the 50 MHz Ethernet reference clock with controlled impedance, and reserve area for the 32 kHz secondary oscillator if RTC operation is required. Use MPLAB Harmony to configure the USB OTG and Ethernet stacks; without it the firmware effort roughly doubles.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC32MX675F256H-80V/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： PIC32MX675F256H-80V/PT （相同外形與佔位） — 差異在於 ADC, Operating Temperature, Package, USB, DMA Channels.
PIC32MX675F256H-80I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX675F256H-80V/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX675F256HT-80V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX575F256H-80V/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX795F512L-80V/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC32MX675F256H-80V/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K |
| Core Frequency | 80 MHz |
| Performance | 105 DMIPS |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 64 KB |
| Operating Voltage (Core) | 2.5 V to 3.6 V |
| Operating Voltage (I/O) | 2.3 V to 3.6 V |
| 工作溫度 | -40 C to +105 C (V grade) |
| I/O Pins | 51 |
| ADC | 10-bit, 16-channel, 1 Msps |
| USB | USB 2.0 On-The-Go with on-chip PHY |
| Ethernet | 10/100 Mbps MAC with MII/RMII |
| DMA Channels | 4 (dedicated for USB OTG) |
| UART / SPI / I2C | 2 / 2 / 2 |
| Timer/Counter | 4 x 16-bit |
| 封裝 | 64-pin TQFP (PT) 10x10 mm, 0.5 mm pitch |
| 安裝類型 | Surface Mount |
| Lead-Free / RoHS | Lead-free, RoHS compliant per Microchip product family |
PIC32MX675F256H-80V/PT 64-pin tqfp (pt) 10x10 mm, 0.5 mm pitch 腳位配置指南
PIC32MX675F256H-80V/PT（64-pin tqfp (pt) 10x10 mm, 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： PIC32MX675F256H-80V/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX675F256H-80V/PT 適用於 6 應用s: Industrial Ethernet Gateway, USB-OTG Device or Host Controller, Building Automation Controller, Point-of-Sale Terminal, Remote Sensor Concentrator, Embedded Web Server / IoT Node.
Industrial Ethernet Gateway
The PIC32MX675F256H-80V/PT is a strong fit for industrial Ethernet gateways because it combines an integrated 10/100 Ethernet MAC supporting MII/RMII with 64 KB SRAM that comfortably hosts an lwIP or Harmony TCP/IP stack. At 80 MHz the M4K core delivers 105 DMIPS, enough to run Modbus TCP, EtherNet/IP, or MQTT client logic alongside HTTP and TLS handshake preparation. Paired with a LAN8720 RMII PHY and external magnetics, the part becomes a complete subnode bridging RS-485 Modbus RTU, USB, or CAN-feldbus slaves to the Ethernet backbone. The V-grade -40 C to +105 C junction range supports DIN-rail and outdoor cabinet installations.
推薦
USB-OTG Device or Host Controller
With on-chip USB 2.0 On-The-Go PHY plus a dedicated DMA channel for OTG, the PIC32MX675F256H-80V/PT is well matched to embedded USB devices, hosts, and dual-role designs. The 256 KB Flash accommodates full USB stacks - CDC ACM, MSD, HID, and vendor classes - without external memory, while 64 KB SRAM holds enumeration buffers and class state. The M4K core at 105 DMIPS sustains USB full-speed 12 Mbps traffic with CPU headroom for application code. Designers save board space and BOM cost by eliminating external PHY chips and level shifters that competing 32-bit MCUs require.
推薦
Building Automation Controller
The PIC32MX675F256H-80V/PT suits building automation nodes - BACnet gateways, KNX bridges, HVAC controllers - by delivering real-time IO core plus Dual connectivity in one MCU. For a BACnet/IP to BACnet MS-TP bridge the integrated Ethernet MAC handles the IP side, while UART peripherals drive MS-TP at 76.8 kbps. The 256 KB Flash plus 64 KB SRAM lets a single MCU run BACnet stack, scheduler, and application logic without external memory. The V temperature grade covers plenum enclosures in non-conditioned spaces, and the 64-pin TQFP footprint simplifies hand-solderable prototyping on standard 0.5 mm-pitch PCBs.
推薦
Point-of-Sale Terminal
For compact POS terminals, the PIC32MX675F256H-80V/PT brings together USB-OTG for external peripherals (barcode scanners, printers), Ethernet for payment authorization, and 256 KB Flash for application code, plus 64 KB RAM for transaction buffers. The 80 MHz core provides fast cryptographic subroutines for token handling, while multiple UARTs drive receipt printers and PIN pads. Surface-mount TQFP-64 supports reflow profiles compatible with standard lead-free PCB assembly used in commercial POS hardware. Microchip's Harmony framework provides ready-made CDC and HID stacks to shorten firmware cycles.
推薦
Remote Sensor Concentrator
As a remote sensor concentrator over Ethernet, the PIC32MX675F256H-80V/PT aggregates analog and digital sensor data from UART, I2C, and SPI field devices and publishes them via MQTT or HTTP. The 16-channel 10-bit ADC at 1 Msps handles direct sensor inputs for analog channels, while dedicated DMA offloads memory-to-memory transfers from the CPU. With 64 KB SRAM the part buffers bursty sensor traffic before forwarding, and the 10/100 Ethernet MAC pushes data to the cloud at sub-second intervals. The V temperature grade accommodates rooftop and pole-mount installations with full sun exposure.
推薦
Embedded Web Server / IoT Node
The PIC32MX675F256H-80V/PT functions as a self-contained embedded web server for IoT nodes, running an HTTP server with RESTful endpoints on the integrated 10/100 Ethernet MAC. At 80 MHz the M4K core serves web pages with reasonable latency for dashboards and configuration portals, while 256 KB Flash holds HTML assets alongside application firmware. The 64 KB SRAM is sufficient for lwIP plus TLS record buffers when paired with a hardware crypto coprocessor. USB OTG enables local configuration and firmware updates over USB mass storage, eliminating the need for JTAG on production units.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX675F256H-80V/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 | PIC32MX675F256H-80I/PT | PIC32MX675F256HT-80V/PT | PIC32MX675F256H-80V/MR | PIC32MX575F256H-80V/PT | PIC32MX795F512L-80V/PT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin QFN (MR) - differs | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB (+100%) |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB (+100%) |
| USB OTG with PHY | Yes (with PHY) | Yes (with PHY) | Yes (with PHY) | Yes (with PHY) | Yes (with PHY) | Yes (with PHY) |
| 10/100 Ethernet MAC | Yes | Yes | Yes | Yes | No | Yes |
| Operating Temperature | -40 C to +105 C (V) | -40 C to +85 C (I) | -40 C to +105 C (V) | -40 C to +105 C (V) | -40 C to +105 C (V) | -40 C to +105 C (V) |
主要差異化特點
- On-chip USB 2.0 OTG with integrated PHY (對比STM32F407VG)
- Industry-leading combination of Flash + RAM + Ethernet + USB OTG in 64-pin TQFP (對比PIC32MX575F256H-80V/PT)
- 256 KB Flash and 64 KB RAM in cost-effective industrial V grade (對比PIC32MX460F256L-80V/PT)
設計說明
Estimated: at 80 MHz full operation the M4K core plus USB OTG + Ethernet MAC draws approximately 70-90 mA from the 3.3 V rail (typical, application-dependent). Provide a low-noise 3.3 V LDO with at least 200 mA rating and place 100 nF + 10 uF decoupling within 5 mm of each VDD/VSS pair. The MCU has multiple VDD pins (core and I/O); each requires its own local decoupling. A ferrite bead between analog AVDD and digital VDD reduces ADC noise coupling into sensitive measurements.
Route the 50 MHz Ethernet reference clock and RMII signals as a matched-length group with 50 ohm controlled impedance and keep them away from the USB DP/DM differential pair. The USB DP/DM pair requires 90 ohm differential impedance. Place the MCU's VCAP pin with a 10 uF + 100 nF pair; this internal regulator output is required for the 1.8 V core. JTAG/ICSP traces should be short (< 50 mm) and pulled to known states during reset to avoid inadvertent entry into debug mode.
Do not connect the VBUS pin of the USB OTG peripheral directly to VDD; USB OTG requires the on-chip PHY's internal voltage regulator and external sensing resistor network on VBUS. The Ethernet MAC requires an external PHY (such as LAN8720A); connecting the MAC directly to a magnetics or RJ-45 without a PHY will not function. The 80V temperature grade must be selected explicitly; substituting the I grade part in V-grade designs voids the temperature spec. Always confirm the JTAG TMS pin is not floating during reset or the part may enter debug mode unintentionally.
Estimated: at full 80 MHz operation with USB OTG active and Ethernet MAC in RMII mode, total power dissipation is approximately 250-300 mW. The TQFP-64 (PT) package has theta_JA around 50 C/W on a 4-layer 1 oz copper PCB, yielding a junction temperature rise of approximately 15 C above ambient at typical conditions. The V-grade -40 C to +105 C window provides adequate margin for industrial installations; ensure PCB copper area around the exposed pad maintains the rated thermal performance.
合規資訊
Lead-free and RoHS compliant per Microchip PIC32MX family datasheet. AEC-Q100 qualification is not applicable - this is an industrial-grade MCU, not an automotive-qualified part. For automotive applications, consult Microchip's dsPIC33 or PIC32MK families.