PIC32MX675F256LT-80V/PF - 80MHz 32-bit MCU w/ 256KB Flash & Ethernet
料号： PIC32MX675F256LT-80V/PF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $9.1 | $91.00 |
| 100 | $8.25 | $825.00 |
| 500 | $7.4 | $3,700.00 |
| 1,000 | $6.65 | $6,650.00 |
PIC32MX675F256LT-80V/PF 概述
A 32-bit microcontroller (MCU) is an embedded processor with on-chip Flash, SRAM and peripherals that executes firmware directly from non-volatile memory. PIC32MX devices use the MIPS32 M4K core and sit in the broader hierarchy of microcontrollers -> embedded processors -> semiconductors, with a focus on connectivity-rich applications such as industrial control, consumer electronics and connected appliances. The PIC32MX5/6/7 family specifically targets an integrated devices market, where on-chip MAC and USB-OTG reduce BOM cost.
Key features of this part include 80 MHz core / 50 MHz peripheral bus operation, 256 KB Flash, 64 KB RAM, a DMA controller with 8 channels, a 10-bit ADC up to 1 Msps with 16 channels, two comparators, five 16-bit timers, and a Real-Time Clock/Calendar. The Ethernet MAC supports RMII/MII PHY interfaces for 10/100 Mbps full-duplex operation. A full-speed USB-OTG controller with on-chip transceiver eliminates the need for an external PHY.
The architecture combines a Harvard-style MIPS M4K core with a multi-vector interrupt controller and a Peripheral Pin Select (PPS) mapping engine that remaps digital peripherals to virtually any I/O pin. The 100-pin TQFP exposes 53 I/Os, of which most are 5V-tolerant in input mode, simplifying interfacing to legacy 5V logic. An integrated voltage regulator supports 2.3V-3.6V single-supply operation, enabling direct Li-Ion or 3.3V regulated designs.
Typical applications include industrial Ethernet gateways, USB-OTG device controllers, HMI panels, point-of-sale terminals, and home/building automation controllers. The combination of Ethernet, USB and multiple serial interfaces suits connected embedded systems with mixed communication needs.
When designing with this device, ensure the 80 MHz part is paired with an 80 MHz-rated Ethernet PHY (such as the KSZ8041) and that PCB layout follows MII trace-length guidelines. Decoupling requires at least one 0.1 uF ceramic capacitor per power pin plus a bulk 10 uF capacitor on VDD.
This page synthesizes distributor pricing, drop-in alternatives within the PIC32MX family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： PIC32MX675F256LT-80V/PF ——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： PIC32MX675F256LT-80V/PF （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, Timers, Operating Temperature, ADC.
快速对比工具——选择替代料号进行并排对比：
PIC32MX675F256L-80V/PF
✅ 直接替换✓ 有现货
$5.1 / 个
查看数据手册 →PIC32MX675F256LT-80I/PF
✅ 直接替换✓ 有现货
$6.45 / 个
查看数据手册 →PIC32MX575F256L-80V/PF
✅ 直接替换✓ 有现货
$6.55 / 个
查看数据手册 →PIC32MX575F256LT-80V/PF
✅ 直接替换✓ 有现货
$5.65 / 个
查看数据手册 →PIC32MX664F128LT-I/PF
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX575F512LT-80V/PF
✅ 直接替换✓ 有现货
$7.92 / 个
查看数据手册 →PIC32MX675F256LT-80V/PF 最大额定值与电气特性
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Speed | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 64 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 53 |
| 封装 | 100-TQFP (14x14 mm, TRAY) |
| Ethernet MAC | 10/100 Mbps (RMII/MII) |
| USB | USB-OTG Full-Speed (on-chip transceiver) |
| ADC | 10-bit, 16 channels, 1 Msps |
| DMA Channels | 8 |
| UART / SPI / I2C | 5 UART / 2 SPI / 2 I2C |
| Timers | Five 16-bit + two 32-bit |
| 工作温度 | -40C to +105C (V = automotive grade) |
| RoHS 状态 | Compliant (lead-free) |
| 安装类型 | Surface Mount |
PIC32MX675F256LT-80V/PF 引脚配置
| 引脚 1 | RF5 — General purpose I/O (PMP) |
| 引脚 2 | RF6 — General purpose I/O (PMP) |
| 引脚 3 | RF7 — General purpose I/O (PMP) |
| 引脚 4 | RF8 — General purpose I/O (PMP) |
| 引脚 5 | RG6 — General purpose I/O |
| 引脚 6 | RG7 — General purpose I/O |
| 引脚 7 | RG8 — General purpose I/O |
| 引脚 8 | VDD — Supply voltage (2.3-3.6V) |
| 引脚 9 | VSS — Ground |
| 引脚 10 | RG9 — General purpose I/O |
| 引脚 11 | RA0 — Analog input / GPIO |
| 引脚 12 | RA1 — Analog input / GPIO |
| 引脚 13 | RA2 — Analog input / GPIO |
| 引脚 14 | RA3 — Analog input / GPIO |
| 引脚 15 | RA4 — Analog input / GPIO |
| 引脚 16 | RA5 — Analog input / GPIO |
| 引脚 17 | RA6 — Analog input / GPIO |
| 引脚 18 | RA7 — Analog input / GPIO |
| 引脚 19 | RA8 — Analog input / GPIO |
| 引脚 20 | RA9 — Analog input / GPIO |
| 引脚 21 | RA10 — Analog input / GPIO |
| 引脚 22 | AVDD — Analog supply voltage |
| 引脚 23 | AVSS — Analog ground |
| 引脚 24 | RA11 — Analog input / GPIO |
| 引脚 25 | RA12 — Analog input / GPIO |
| 引脚 26 | RA13 — Analog input / GPIO |
| 引脚 27 | RA14 — Analog input / GPIO |
| 引脚 28 | RA15 — Analog input / GPIO |
| 引脚 29 | RB0 — GPIO with CN interrupt |
| 引脚 30 | RB1 — GPIO with CN interrupt |
| 引脚 31 | RB2 — GPIO with CN interrupt |
| 引脚 32 | RB3 — GPIO with CN interrupt |
| 引脚 33 | RB4 — GPIO with CN interrupt |
| 引脚 34 | RB5 — GPIO with CN interrupt |
| 引脚 35 | RB6 — GPIO with CN interrupt |
| 引脚 36 | RB7 — GPIO with CN interrupt |
| 引脚 37 | RB8 — GPIO with CN interrupt |
| 引脚 38 | RB9 — GPIO with CN interrupt |
| 引脚 39 | RB10 — GPIO with CN interrupt |
| 引脚 40 | RB11 — GPIO with CN interrupt |
| 引脚 41 | RB12 — GPIO with CN interrupt |
| 引脚 42 | RB13 — GPIO with CN interrupt |
| 引脚 43 | RB14 — GPIO with CN interrupt |
| 引脚 44 | RB15 — GPIO with CN interrupt |
| 引脚 45 | RC1 — GPIO / Ethernet TX (ETH) |
| 引脚 46 | RC2 — GPIO / Ethernet (ETH) |
| 引脚 47 | RC3 — GPIO / Ethernet (ETH) |
| 引脚 48 | RC4 — GPIO / Ethernet (ETH) |
| 引脚 49 | VDD — Supply voltage |
| 引脚 50 | VSS — Ground |
| 引脚 51 | RC5 — GPIO / Ethernet (ETH) |
| 引脚 52 | RC6 — GPIO / Ethernet (ETH) |
| 引脚 53 | RC7 — GPIO / Ethernet (ETH) |
| 引脚 54 | RC8 — GPIO / Ethernet (ETH) |
| 引脚 55 | RC9 — GPIO / Ethernet (ETH) |
| 引脚 56 | RC10 — GPIO / USB VBUS |
| 引脚 57 | RC11 — GPIO / USB D- |
| 引脚 58 | RC12 — GPIO / USB D+ |
| 引脚 59 | RC13 — GPIO |
| 引脚 60 | RC14 — GPIO |
| 引脚 61 | RC15 — GPIO |
| 引脚 62 | RD0 — GPIO (PMP) |
| 引脚 63 | RD1 — GPIO (PMP) |
| 引脚 64 | RD2 — GPIO (PMP) |
| 引脚 65 | RD3 — GPIO (PMP) |
| 引脚 66 | RD4 — GPIO (PMP) |
| 引脚 67 | RD5 — GPIO (PMP) |
| 引脚 68 | RD6 — GPIO (PMP) |
| 引脚 69 | RD7 — GPIO (PMP) |
| 引脚 70 | RD8 — GPIO (PMP) |
| 引脚 71 | RD9 — GPIO (PMP) |
| 引脚 72 | RD10 — GPIO (PMP) |
| 引脚 73 | RD11 — GPIO (PMP) |
| 引脚 74 | RD12 — GPIO (PMP) |
| 引脚 75 | VDD — Supply voltage |
| 引脚 76 | VSS — Ground |
| 引脚 77 | RD13 — GPIO (PMP) |
| 引脚 78 | RD14 — GPIO (PMP) |
| 引脚 79 | RD15 — GPIO (PMP) |
| 引脚 80 | RE0 — GPIO (PMP) |
| 引脚 81 | RE1 — GPIO (PMP) |
| 引脚 82 | RE2 — GPIO (PMP) |
| 引脚 83 | RE3 — GPIO (PMP) |
| 引脚 84 | RE4 — GPIO (PMP) |
| 引脚 85 | RE5 — GPIO (PMP) |
| 引脚 86 | RE6 — GPIO (PMP) |
| 引脚 87 | RE7 — GPIO (PMP) |
| 引脚 88 | RE8 — GPIO |
| 引脚 89 | RE9 — GPIO |
| 引脚 90 | RF0 — GPIO (PMP) |
| 引脚 91 | RF1 — GPIO (PMP) |
| 引脚 92 | RF2 — GPIO (PMP) |
| 引脚 93 | RF3 — GPIO (PMP) |
| 引脚 94 | RF4 — GPIO (PMP) |
| 引脚 95 | RG0 — GPIO |
| 引脚 96 | RG1 — GPIO |
| 引脚 97 | RG2 — GPIO |
| 引脚 98 | RG3 — GPIO |
| 引脚 99 | MCLR — Master clear / reset input (active low) |
| 引脚 100 | OSC1 — Crystal oscillator input |
典型应用
PIC32MX675F256LT-80V/PF 适用于 7 应用s: Industrial Ethernet Gateway, USB-OTG Device/Host Controller, Human-Machine Interface (HMI) Panels, Point-of-Sale (POS) Terminal, Building Automation Controller, Connected Home Gateway / IoT Bridge, Industrial Sensor Hub / Data Logger.
Industrial Ethernet Gateway
The PIC32MX675F256LT-80V/PF is purpose-built for industrial Ethernet gateway applications thanks to its integrated 10/100 Mbps MAC with MII/RMII PHY interface. The 80 MHz MIPS M4K core can sustain full-duplex 100 Mbps throughput with Microchip's Harmony TCP/IP stack while leaving cycles for application protocols (Modbus TCP, EtherNet/IP, MQTT-SN). The 256 KB Flash accommodates a TLS-capable TCP/IP stack plus custom gateway logic, and the DMA controller offloads packet copying from the CPU. Designers pair the MCU with an RMII PHY (e.g., KSZ8041) and a small magnetics module for a complete two-port Ethernet gateway in 20-30 sq cm.
推荐
USB-OTG Device/Host Controller
The PIC32MX675F256LT-80V/PF integrates a full-speed USB-OTG controller with an on-chip transceiver, removing the need for an external USB PHY and shrinking the BOM for USB peripherals. It supports Host, Device, and Dual-Role modes with SRP and HNP per the OTG supplement, enabling designs such as USB memory card readers, USB HID bridges, and USB-to-UART bridges. The 80 MHz core plus 8-channel DMA sustain full-speed (12 Mbps) USB throughput, and 64 KB RAM buffers USB packet payloads without bottleneck. Use external ESD protection (e.g., USBLC6-2SC6) on D+/D- lines.
推荐
Human-Machine Interface (HMI) Panels
With 53 GPIOs, 5 UARTs, 2 SPI channels and a Parallel Master Port (PMP), the PIC32MX675F256LT-80V/PF can drive TFT LCDs via PMP and concurrently connect to touch controllers, keypads, and serial sensors. The 80 MHz core renders buttons, fonts and waveforms via Microchip's Harmony Graphics Library on QVGA/WQVGA displays. The 256 KB Flash stores graphics assets and UI logic while 64 KB SRAM serves as the framebuffer and touch-event queue. Industrial-grade (-40C to +105C) parts handle factory-floor temperature ranges without additional conditioning.
推荐
Point-of-Sale (POS) Terminal
POS terminals need Ethernet for back-office sync, USB-OTG for peripherals (barcode scanners, cash drawers, printers), and serial ports for legacy equipment. The PIC32MX675F256LT-80V/PF delivers all three on one die, plus 256 KB Flash for payment firmware and EMV libraries. The 80 MHz performance sustains contactless card reader handling over SPI while maintaining TCP connectivity for transaction authorization. Industrial temperature grade ('V') supports kitchen/restaurant POS deployments with heat exposure.
推荐
Building Automation Controller
The PIC32MX675F256LT-80V/PF suits BACnet, Modbus, and KNX-style building automation controllers thanks to its mix of Ethernet (for IP-bus), UART (for RS-485 sensor trunks), and SPI/I2C (for local sensor hubs). The 80 MHz core runs BACnet/IP stack plus custom control loops, and 53 GPIOs interface to relay boards and triac drivers. Low sleep current with RTC and WDT retention supports battery-backed operation during AC mains loss. The 100-pin TQFP footprint is large enough for extensive GPIO memory without multiplexer tricks.
推荐
Connected Home Gateway / IoT Bridge
The PIC32MX675F256LT-80V/PF is well matched to consumer IoT bridges that aggregate Wi-Fi/Zigbee/Z-Wave peripherals and present them on Ethernet or USB-OTG to the home network. The integrated Ethernet MAC and USB-OTG simplify dual-radio designs, while the 256 KB Flash stores Wi-Fi/BLE companion-host firmware and 64 KB RAM handles protocol translation buffers. The 80 MHz core executes TLS handshakes and JSON/MQTT serialization without off-chip crypto accelerators. Use it with a Murata Type-1LD module for Wi-Fi or a BT830 module for BLE.
推荐
Industrial Sensor Hub / Data Logger
The PIC32MX675F256LT-80V/PF functions as a multi-sensor data logger using its 16-channel 10-bit ADC (1 Msps), 5 UARTs, 2 SPI and 2 I2C. The 256 KB Flash stores calibration tables and configuration, while 64 KB RAM buffers burst ADC samples streamed via DMA. With Ethernet MAC onboard, the logger streams continuous readings to a SCADA host without requiring a separate gateway. Industrial-grade (-40C to +105C) parts handle cabinet temperatures near motors and drives.
推荐
推荐产品汇总
工程参考数据： PIC32MX675F256LT-80V/PF ——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 | PIC32MX675F256L-80V/PF | PIC32MX575F256L-80V/PF | PIC32MX664F128LT-I/PF |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (14x14) | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same |
| Core Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB (-50%) |
| SRAM | 64 KB | 64 KB | 64 KB | 32 KB (-50%) |
| Ethernet MAC | 10/100 Mbps | 10/100 Mbps | Not present | 10/100 Mbps |
| USB | USB-OTG Full-Speed | USB-OTG Full-Speed | Not present | USB-OTG Full-Speed |
| Temperature Grade | -40C to +105C (V) | -40C to +105C (V) | -40C to +105C (V) | -40C to +85C (I) |
| Packaging | Tape & Reel | Tray | Tray | Tape & Reel |
关键差异点
- 256 KB Flash + 64 KB RAM is the sweet spot for Harmony TCP/IP stack with custom application code （对比 PIC32MX664F128LT-I/PF)
- Industrial-grade -40C to +105C operating range ('V' suffix) （对比 PIC32MX675F256LT-80I/PF)
- Integrated 10/100 Ethernet MAC plus USB-OTG on a single die （对比 PIC32MX575F256L-80V/PF)
设计说明
The PIC32MX675F256LT-80V/PF requires a clean 3.3 V regulated supply with at least 80 mA capability (typical VDD current is 50-70 mA at 80 MHz plus peripheral current). Place one 0.1 uF ceramic decoupling capacitor adjacent to each VDD/VSS pair (pins 8/9, 49/50, 75/76) plus a single 10 uF bulk tantalum or ceramic capacitor on the main VDD rail. For the analog supply AVDD/AVSS (pins 22/23), add a ferrite bead or 10 ohm resistor isolation from VDD plus a dedicated 0.1 uF + 10 uF decoupling pair to minimize ADC ADC reference. Estimated: typical active current = 50 mA + 5 mA analog = 55 mA; max rated VDD is 3.6 V (do not exceed).
For Ethernet MII/RMII operation, route the MII/RMII traces (RC1-RC9, plus ETH_CLK, ETH_CRS_DV, ETH_RX_DV, ETH_RX_ER, ETH_TX_EN, ETH_TXD0/1, ETH_RXD0/1) with 50 ohm characteristic impedance and length-matched within 50 mil of the PHY. Keep MII traces short (under 50 mm) and away from switching regulators and high-current traces. Place the RMII/MII PHY adjacent to the MCU's Ethernet pins to minimize trace length. The 25 MHz or 50 MHz RMII reference clock should originate from the PHY and feed back into the MCU's ETH_CLK pin.
Use a 4-layer PCB with a continuous ground plane beneath the MCU to provide controlled impedance and thermal dissipation. Route the 8 MHz primary crystal (or 14.7456 MHz if UART baud-rate accuracy is critical) traces within 5 mm of the OSC1/OSC2 pads and guard them with a ground ring. Keep the JTAG pins (TCK/TMS/TDO/TDI/TCK) accessible for in-circuit debugging via a 0.05 inch header. The exposed thermal pad is not present on 100-TQFP, so attach to a moderate copper pour on the top layer for thermal relief.
Avoid the common error of using the PIC32MX675F256L-80V/PF (tray) part number in the BOM when the SMT line is set up for tape-and-reel - this causes line stoppages. Verify the correct 'LT' (tape-and-reel) vs 'L' (tray) suffix. Also: do not exceed the 3.6 V absolute maximum on VDD, and do not rely on the internal 1.8 V regulator to source external loads (it is for the core only). Finally, do not forget Peripheral Pin Select (PPS) mapping in firmware - many peripherals require PPS configuration before use, and unmatched mapping is the most common cause of 'dead' UART/SPI/I2C peripherals.
合规信息
RoHS and lead-free compliant per Microchip product page (/PF suffix). AEC-Q100 not qualified at part level - automotive customers should verify with Microchip for AEC-Q100 documentation.
