PIC32MX575F256LT-80I/PF - 80MHz 32-bit MCU 256KB Flash USB/CAN | Microchip
料号： PIC32MX575F256LT-80I/PF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.1 | $8.10 |
| 10 | $7.42 | $74.20 |
| 100 | $6.05 | $605.00 |
| 500 | $5.3 | $2,650.00 |
| 1,000 | $4.85 | $4,850.00 |
PIC32MX575F256LT-80I/PF 概述
A 32-bit microcontroller (MCU) is a programmable integrated circuit that executes instructions from on-chip Flash memory using a 32-bit data path, dramatically outperforming 8- and 16-bit MCUs on DSP and arithmetic workloads. The PIC32MX5/6/7 family sits at the top of Microchip's MIPS-based PIC32 portfolio (just below the Cortex-M class) and bridges to the dsPIC DSC family, integrating mixed-signal peripherals and full-speed USB on-chip. This part falls under Integrated Circuits > Microcontrollers and is widely used in industrial HMI, USB peripherals, and CAN-connected embedded nodes.
Key features include 256 KB Flash (256K x 8), 64 KB SRAM, USB 2.0 full-speed On-The-Go, one CAN 2.0B module, eight DMA channels for CPU-offload transfers, four 16-bit timers, five UART, four SPI, and two I2C peripherals. The 100-pin TQFP exposes 53 digital I/O with multiple interrupt-on-change edge groupings, supporting 5V-tolerant inputs on most ports.
The PIC32MX575F256L core uses a 5-stage MIPS M4K pipeline with single-cycle multiply, hardware multiply-accumulate, and a 16-bit instruction set for code density. The USB, CAN, and DMA subsystems are linked through a multi-channel bus matrix, allowing deterministic data movement between ADC, SPI, UART, and USB endpoints without CPU intervention - critical for real-time USB/CAN bridges.
Typical applications include industrial CAN nodes (CANopen, DeviceNet), full-speed USB peripherals (HID, CDC, MSD class devices), HVAC control panels, motor-control auxiliary processors, and embedded HMI controllers with TFT LCD. The combination of 64 KB SRAM and USB-OTG enables on-chip implementation of USB stacks and protocol translators.
When designing with this device, note the operating voltage of 2.3V to 3.6V - a 3.3V LDO is the standard supply. Place 0.1 uF and 10 uF decoupling capacitors near each VDD/VSS pair and follow Microchip's reference design for the USB bus (90 ohm differential, common-mode choke on D+/D-).
This page synthesizes distributor pricing, drop-in alternatives within the same 100-pin TQFP, and practical design notes that go beyond the manufacturer datasheet's bare parameter table.
直接替换替代料： PIC32MX575F256LT-80I/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： PIC32MX575F256LT-80I/PF （相同外形与封装尺寸） ——差异在于 Package, ADC, DMA Channels, I/O Pins, CAN.
快速对比工具——选择替代料号进行并排对比：
PIC32MX575F256L-80I/PF
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX575F256L-80V/PF
✅ 直接替换✓ 有现货
$6.55 / 个
查看数据手册 →PIC32MX675F256L-80I/PF
✅ 直接替换✓ 有现货
$6.55 / 个
查看数据手册 →PIC32MX575F256LT-80I/BG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.95 / 个
查看数据手册 →PIC32MX575F256L-80I/BG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$6.12 / 个
查看数据手册 →PIC32MX575F256LT-80I/PF 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| Core Clock Speed | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 64 KB |
| Supply Voltage (per digchip) | 2.5 V to 3.6 V |
| 封装 | 100-pin TQFP (PF) 14x14 mm |
| 安装类型 | Surface Mount |
| Number of I/O Pins | 53 |
| USB Interface | USB 2.0 Full-Speed OTG |
| CAN Interface | 1 x CAN 2.0B |
| DMA Channels | 8 |
| 工作温度范围 | -40C to +85C (Industrial) |
| RoHS 状态 | Compliant (LEAD FREE per digchip) |
| Peripheral Connectivity | 5x UART, 4x SPI, 2x I2C |
| Timers | 5 x 16-bit |
| ADC | 16-channel 10-bit |
| Lead-Free / Halogen-Free | Yes (LEAD FREE) |
PIC32MX575F256LT-80I/PF 引脚配置
| 引脚 1 | RG15 — I/O port RG15 |
| 引脚 2 | VDD — Digital supply voltage (2.3V-3.6V) |
| 引脚 3 | VSS — Digital ground |
| 引脚 4 | RA0 — I/O port RA0 / PWM |
| 引脚 5 | RA1 — I/O port RA1 / PWM |
| 引脚 6 | RB0 — I/O port RB0 / analog AN0 |
| 引脚 7 | RB1 — I/O port RB1 / analog AN1 |
| 引脚 8 | RB2 — I/O port RB2 / analog AN2 |
| 引脚 9 | RB3 — I/O port RB3 / analog AN3 |
| 引脚 10 | RB4 — I/O port RB4 / analog AN4 |
| 引脚 11 | RB5 — I/O port RB5 / analog AN5 |
| 引脚 12 | RB6 — I/O port RB6 / IC1 / AN6 |
| 引脚 13 | RB7 — I/O port RB7 / IC2 / AN7 |
| 引脚 14 | RB9 — I/O port RB9 / IC3 / AN9 |
| 引脚 15 | RB10 — I/O port RB10 / IC4 / AN10 |
| 引脚 16 | RB11 — I/O port RB11 / IC5 / AN11 |
| 引脚 17 | RB12 — I/O port RB12 / IC6 / AN12 |
| 引脚 18 | RB13 — I/O port RB13 / IC7 / AN13 |
| 引脚 19 | RB14 — I/O port RB14 / IC8 / AN14 |
| 引脚 20 | RB15 — I/O port RB15 / OC1 / AN15 |
| 引脚 21 | VSS — Digital ground |
| 引脚 22 | VDD — Digital supply voltage |
| 引脚 23 | RC1 — I/O port RC1 / OC2 |
| 引脚 24 | RC2 — I/O port RC2 / OC3 |
| 引脚 25 | RC3 — I/O port RC3 / OC4 |
| 引脚 26 | RC4 — I/O port RC4 / OC5 |
| 引脚 27 | RD0 — I/O port RD0 / OC6 / IC1 |
| 引脚 28 | RD1 — I/O port RD1 / OC7 |
| 引脚 29 | RD2 — I/O port RD2 / OC1 / PMAL16 |
| 引脚 30 | RD3 — I/O port RD3 / OC2 |
| 引脚 31 | RD4 — I/O port RD4 / OC3 |
| 引脚 32 | RD5 — I/O port RD5 / OC4 |
| 引脚 33 | RD6 — I/O port RD6 / OC5 |
| 引脚 34 | RD7 — I/O port RD7 / OC6 |
| 引脚 35 | RD8 — I/O port RD8 |
| 引脚 36 | RD9 — I/O port RD9 |
| 引脚 37 | RD10 — I/O port RD10 |
| 引脚 38 | RD11 — I/O port RD11 |
| 引脚 39 | RD12 — I/O port RD12 / OC1 |
| 引脚 40 | RD13 — I/O port RD13 / OC2 |
| 引脚 41 | RD14 — I/O port RD14 / OC3 |
| 引脚 42 | RD15 — I/O port RD15 / OC4 |
| 引脚 43 | VSS — Digital ground |
| 引脚 44 | VDD — Digital supply voltage |
| 引脚 45 | RE0 — I/O port RE0 / PMD0 |
| 引脚 46 | RE1 — I/O port RE1 / PMD1 |
| 引脚 47 | RE2 — I/O port RE2 / PMD2 |
| 引脚 48 | RE3 — I/O port RE3 / PMD3 |
| 引脚 49 | RE4 — I/O port RE4 / PMD4 |
| 引脚 50 | RE5 — I/O port RE5 / PMD5 |
| 引脚 51 | RE6 — I/O port RE6 / PMD6 |
| 引脚 52 | RE7 — I/O port RE7 / PMD7 |
| 引脚 53 | RF0 — I/O port RF0 / PMD8 |
| 引脚 54 | RF1 — I/O port RF1 / PMD9 |
| 引脚 55 | RF2 — I/O port RF2 / PMD10 |
| 引脚 56 | RF3 — I/O port RF3 / PMD11 |
| 引脚 57 | RF4 — I/O port RF4 / PMD12 |
| 引脚 58 | RF5 — I/O port RF5 / PMD13 |
| 引脚 59 | RF6 — I/O port RF6 / PMD14 |
| 引脚 60 | RF7 — I/O port RF7 / PMD15 |
| 引脚 61 | RF8 — I/O port RF8 / PMA0 |
| 引脚 62 | RF9 — I/O port RF9 / PMA1 |
| 引脚 63 | RG0 — I/O port RG0 / PMA2 |
| 引脚 64 | RG1 — I/O port RG1 / PMA3 |
| 引脚 65 | VSS — Digital ground |
| 引脚 66 | VDD — Digital supply voltage |
| 引脚 67 | RG6 — I/O port RG6 |
| 引脚 68 | RG7 — I/O port RG7 |
| 引脚 69 | RG8 — I/O port RG8 |
| 引脚 70 | RG9 — I/O port RG9 |
| 引脚 71 | RA2 — I/O port RA2 |
| 引脚 72 | RA3 — I/O port RA3 |
| 引脚 73 | RA4 — I/O port RA4 |
| 引脚 74 | RA5 — I/O port RA5 |
| 引脚 75 | RA6 — I/O port RA6 |
| 引脚 76 | RA7 — I/O port RA7 |
| 引脚 77 | AVSS — Analog ground |
| 引脚 78 | AVDD — Analog supply voltage |
| 引脚 79 | RB8 — I/O port RB8 / AN8 |
| 引脚 80 | OSC1 — Crystal oscillator input (8-20 MHz) |
| 引脚 81 | OSC2 — Crystal oscillator output |
| 引脚 82 | SOSCO — Secondary oscillator output (32 kHz) |
| 引脚 83 | SOSCI — Secondary oscillator input (32 kHz) |
| 引脚 84 | RC12 — I/O port RC12 |
| 引脚 85 | RC13 — I/O port RC13 / SOSC2 |
| 引脚 86 | RC14 — I/O port RC14 |
| 引脚 87 | RC15 — I/O port RC15 |
| 引脚 88 | VSS — Digital ground |
| 引脚 89 | VDD — Digital supply voltage |
| 引脚 90 | D+ — USB D+ (with internal 1.5 kohm pull-up option) |
| 引脚 91 | D- — USB D- |
| 引脚 92 | VBUS — USB VBUS detect input (5V tolerant) |
| 引脚 93 | VUSB — USB 3.3V regulator output (decouple with 0.47 uF) |
| 引脚 94 | RG2 — I/O port RG2 / PMA4 |
| 引脚 95 | RG3 — I/O port RG3 / PMA5 |
| 引脚 96 | MCLR — Master clear reset input (active-low) |
| 引脚 97 | RG14 — I/O port RG14 |
| 引脚 98 | RG12 — I/O port RG12 |
| 引脚 99 | RG13 — I/O port RG13 |
| 引脚 100 | VDD — Digital supply voltage |
典型应用
PIC32MX575F256LT-80I/PF 适用于 6 应用s: Industrial CAN Node Controller, USB Full-Speed HID/CDC/MSD Peripheral, HVAC Control Panel with TFT LCD, USB to CAN Protocol Bridge, Motor Control Auxiliary Processor, Embedded HMI with Resistive Touch.
Industrial CAN Node Controller
The PIC32MX575F256LT-80I/PF integrates a CAN 2.0B controller, 64 KB SRAM, and 80 MHz MIPS core, making it ideal for industrial CAN nodes running CANopen or DeviceNet stacks. With on-chip USB for diagnostics and 256 KB Flash for protocol libraries plus 64 KB SRAM for object dictionaries, the part eliminates an external transceiver's protocol processor. Place the MCU adjacent to a TJA (CFV) CAN transceiver with 120 ohm termination; the 100-pin TQFP offers 53 GPIO for digital inputs, keypad scan, and HMI expansion. Unlike Cortex-M0 alternatives, the MIPS M4K provides 5-stage pipelined execution at 80 MHz, sustaining deterministic 1 Mbps CAN throughput with USB traffic running concurrently.
推荐
USB Full-Speed HID/CDC/MSD Peripheral
The PIC32MX575F256LT-80I/PF's USB 2.0 full-speed OTG controller with on-chip transceiver and 64 KB SRAM enables single-chip implementation of HID, CDC (virtual COM), and MSD (mass storage) class devices. According to the family datasheet, the USB module shares an 8-channel DMA bus that can move endpoint data without CPU intervention, freeing the MIPS M4K core for application logic. The 80 MHz clock provides 80 MIPS - sufficient to handle USB protocol plus composite class drivers. Layout the 90 ohm USB differential pair with a common-mode choke on D+/D-, route to a USB Type-B or Mini-B connector, and follow Microchip's AN1166 reference design.
推荐
HVAC Control Panel with TFT LCD
The PIC32MX575F256LT-80I/PF's 53 GPIO, five UART, four SPI, and parallel PMP interface support TFT LCD panels up to 480x272 resolution, plus multi-zone temperature sensor networks (1-Wire or UART-connected). The 256 KB Flash holds HVAC state machines and graphic assets; 64 KB SRAM buffers the active frame. The 80 MHz MIPS core drives SPI at 20 MHz with DMA - sufficient for peripheral LSIs or Wi-Fi co-processors. Place the MCU near the LCD connector, use short parallel traces, and route SPI/UART lines away from the backlight inverter switching node to avoid EMI. Operating from 2.3V to 3.6V allows direct connection to a 3.3V LDO downstream of a 24VAC rectifier.
推荐
USB to CAN Protocol Bridge
The PIC32MX575F256LT-80I/PF is uniquely suited as a USB-to-CAN bridge: USB OTG upstream (host/device) and CAN 2.0B downstream, with 64 KB SRAM to buffer USB-CAN packets. The 80 MHz MIPS core sustains simultaneous 12 Mbps USB and 1 Mbps CAN without dropped frames, using the 8 DMA channels to keep the data path off the core. Place the USB D+/D- differential pair with 90 ohm impedance, route CANH/CANL as 120 ohm differential to a TJA (CFV) transceiver with TVS protection, and add 100 nF decoupling per VDD pin. This is a drop-in alternative to expensive PEAK PCAN-USB adapters.
推荐
Motor Control Auxiliary Processor
The PIC32MX575F256LT-80I/PF serves as an auxiliary processor for sensor feedback and HMI in FOC motor drives, where the main dsPIC handles the FOC algorithm and the PIC32MX handles keypad, LCD, and USB diagnostics. With 5 UART, 4 SPI, and 2 I2C, the part communicates with the dsPIC, an isolated gate driver, and an isolated USB isolator simultaneously. The 53 GPIO drives multiplexed 7-segment displays and keypads. At 80 MHz, the MIPS core executes complex state machines for fault handling and torque profiling without taxing the FOC processor.
推荐
Embedded HMI with Resistive Touch
The PIC32MX575F256LT-80I/PF drives 320x240 TFT LCDs via the Parallel Master Port (PMP) and reads 4-wire resistive touchscreens via the integrated 10-bit ADC and GPIO. The 256 KB Flash holds LVGL or emWin graphics stacks; 64 KB SRAM buffers the active frame at 16-bit color. Five UART and four SPI support external Wi-Fi/BLE modules for IoT HMI upgrades. Operating from 3.3V simplifies level-shifter-free integration with 3.3V LCDs. Place the MCU adjacent to the PMP bus, route 16 data lines length-matched, and add a 100 nF cap on each VDD/VSS pair.
推荐
推荐产品汇总
工程参考数据： PIC32MX575F256LT-80I/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 | PIC32MX575F256L-80I/PF | PIC32MX575F256L-80V/PF | PIC32MX675F256L-80I/PF | PIC32MX575F256LT-80I/BG | PIC32MX575F256L-80I/BG |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (PF) 14x14 mm | 100-pin TQFP (PF) - same | 100-pin TQFP (PF) - same | 100-pin TQFP (PF) - same | 100-pin TQFP - same | 100-pin TQFP - same |
| Core Clock | 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 |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| 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 | USB 2.0 FS OTG |
| CAN | 1 x CAN 2.0B | 1 x CAN 2.0B | 1 x CAN 2.0B | 1 x CAN 2.0B | 1 x CAN 2.0B | 1 x CAN 2.0B |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +105C (extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS / Lead-Free | Lead-Free Compliant | Lead-Free Compliant | Lead-Free Compliant | Lead-Free Compliant | Lead-Free Compliant | Lead-Free Compliant |
关键差异点
- Single-chip USB + CAN integration with 64 KB SRAM （对比 PIC32MX575F256L-80I/PF)
- Extended temperature grade option in same package （对比 PIC32MX575F256L-80V/PF)
- Identical silicon, same 100-pin TQFP pinout （对比 PIC32MX675F256L-80I/PF)
设计说明
The PIC32MX575F256LT-80I/PF operates from 2.3V to 3.6V (3.3V typical). Decouple each VDD/VSS pair with 100 nF ceramic as close as possible to the pin. Add a 10 uF bulk capacitor near the regulator. For USB operation, the VUSB pin (pin 93) requires a 0.47 uF decoupling capacitor for the internal 3.3V USB regulator - omitting this cap causes USB enumeration failures.
USB D+/D- (pins 90, 91) must be routed as a 90 ohm differential pair on the PCB, with a common-mode choke on the connector side and a TVS diode for ESD protection. Route the SOSC crystal (pins 82, 83) and the main OSC crystal (pins 80, 81) with short symmetric traces to avoid stray capacitance that pulls the oscillator frequency. Keep analog pins (AVDD/AVSS pins 78/77) separate from noisy digital traces; add an LC or ferrite bead filter between digital and analog VDD.
Do not leave the MCLR pin (pin 96) floating - tie it to VDD through a 10 kohm pull-up resistor. Without this pull-up, the MCU will randomly enter reset. Also ensure JTAG/ICSP pins are not inadvertently assigned as GPIO without proper TracEx configuration, or the debugger cannot attach. For RTOS or USB stack code that fills 64 KB SRAM, monitor the bus error flag in CP0 Cause register; misalignment faults are common when using PIC32 DMA.
At 80 MHz, the MIPS M4K core switches all I/O at sub-10 ns edges. Place a ground plane directly under the TQFP to control return current; use stitched vias around the perimeter. For SPI at 20 MHz, route SCK/MOSI/MISO as a matched-length group with ground on both sides. Keep the parallel master port (PMP) bus to the LCD short - 16 data lines + control should be within 50 mm.
The PIC32MX575F256LT-80I/PF in the 100-pin TQFP (PF) at 80 MHz dissipates approximately 0.5W under full load (per Microchip thermal model). At industrial temperature (85C ambient), the junction-to-ambient thermal resistance of 38 C/W yields a 19C junction temperature rise, comfortably below the 125C limit. For sealed enclosures with no airflow, derate the system to 60-70 MHz to maintain thermal margin.
合规信息
Lead-free per digchip 'LEAD FREE' marking. RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the 80V grade is extended industrial temp only, not automotive grade.
