PIC32MX550F256L-V/PT - 256KB Flash 32-bit MCU USB CAN | Microchip
MPN： PIC32MX550F256L-V/PT ✓ 啟用中PIC32MX550F256L-V/PT 概覽
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals on a single silicon die. The PIC32MX5XX family specifically targets connected-embedded designs that require full-speed USB and graphic HMI capability. Within the broader taxonomy, this part is a 32-bit MCU -> embedded processor -> semiconductor, sitting in Microchip's PIC32MX1XX/2XX/5XX 64/100-pin family alongside the smaller MX1/MX2 derivatives.
Key features include a USB 2.0-compliant full-speed On-The-Go controller, a CAN 2.0B module with DeviceNet addressing support, two I2S and four SPI modules for audio codecs and serial communications, a Peripheral Pin Select (PPS) function for flexible remapping, and a Parallel Master Port (PMP) with dual read/write buffers for graphics interfaces. The -V/PT suffix denotes the 100-pin TQFP (12x12 mm) package and the -40C to +105C operating range.
The M4K core executes most instructions in a single cycle, has a five-stage pipeline, and supports MIPS16e code compression to reduce Flash footprint. The integrated 256 KB Flash and 32 KB SRAM are joined by dedicated DMA channels and a 10-bit number peripherals whose accuracy/throughput meet typical industrial-sensing needs.
Typical applications include automotive infotainment HMI, CAN-connected industrial sensor hubs, USB device/host bridges, low-cost graphic displays using PMP, and audio streaming designs using the I2S codec interface. For each, the combination of USB, CAN, and PMP eliminates the need for separate bridge ICs.
When designing with this device, place a 10 uF bulk plus 0.1 uF decoupling capacitor pair near each power pin and route the 48 MHz primary oscillator trace symmetrically with a ground pour on both sides to preserve USB signal integrity.
This page synthesizes distributor pricing, AEC-Q100 cross-references, and practical design notes beyond the manufacturer datasheet to help procurement and firmware engineers qualify a replacement.
直接替換替代品，適用於 PIC32MX550F256L-V/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： PIC32MX550F256L-V/PT （相同外形與佔位） — 差異在於 Package, ADC, Core Architecture, Operating Temperature, USB.
PIC32MX550F256LT-V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX570F512L-V/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX470F512L-V/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX460F512L-80V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-V/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K |
| Maximum CPU Speed | 50 MHz (83 DMIPS) |
| Program Flash Memory | 256 KB |
| Data SRAM | 32 KB |
| 封裝 | TQFP-100 (PT), 12x12 mm |
| Operating Voltage | 2.3 V to 3.6 V |
| 工作溫度 | -40C to +105C (V grade) |
| USB | USB 2.0 Full-Speed OTG |
| CAN | CAN 2.0B with DeviceNet addressing |
| I2S Modules | 2 |
| SPI Modules | 4 |
| Parallel Master Port (PMP) | Yes, dual read/write buffers |
| Peripheral Pin Select (PPS) | Yes |
| Automotive Qualification | AEC-Q100 |
| 安裝類型 | Surface Mount |
PIC32MX550F256L-V/PT tqfp-100 (pt), 12x12 mm 腳位配置指南
PIC32MX550F256L-V/PT（tqfp-100 (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： PIC32MX550F256L-V/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX550F256L-V/PT 適用於 6 應用s: Automotive CAN-USB Diagnostic Tool, Industrial CAN Sensor Hub, USB Audio Streaming Device, Low-Cost Graphic HMI Panel, USB Host Mass-Storage Bridge, Connected Home IoT Gateway.
Automotive CAN-USB Diagnostic Tool
The PIC32MX550F256L-V/PT's integrated CAN 2.0B with DeviceNet addressing plus USB 2.0 Full-Speed OTG makes it ideal for handheld automotive diagnostic bridges that read OBD-II traffic and present it over USB to a host PC. AEC-Q100 qualification plus -40C to +105C operation lets the same hardware deploy in engine bay and cabin environments. With 256 KB Flash and 32 KB SRAM, the device holds the CAN-to-USB translation stack plus a small command parser without external memory. The 100-pin TQFP package exposes all required USB D+/D- and CAN TX/RX pins without multiplexer workarounds.
推薦
Industrial CAN Sensor Hub
The PIC32MX550F256L-V/PT powers a small industrial sensor hub that aggregates data from multiple CAN sensors and exposes the aggregated stream over USB or UART. The CAN 2.0B peripheral handles standard and extended frames at 1 Mbit/s, while the DMA channels offload message buffering from the M4K core. The 50 MHz core is fast enough to timestamp, filter, and forward 1000+ CAN frames per second without dropping packets. PPS remapping allows flexible PCB routing when the hub sits behind connectors or in tight enclosures.
推薦
USB Audio Streaming Device
With two I2S interfaces and four SPI modules, the PIC32MX550F256L-V/PT implements a USB audio streaming device that reads from an external ADC over I2S and presents a USB Audio Class 1.0 endpoint to a host PC. The 50 MHz MIPS32 M4K core runs the USB stack plus the I2S DMA pump without contention. The 32 KB SRAM holds double-buffered audio frames at 48 kHz stereo 16-bit, which is the typical sweet spot for USB speakers and headsets. PPS routes I2S bit-clock and word-select signals to free GPIO for control buttons.
推薦
Low-Cost Graphic HMI Panel
The PIC32MX550F256L-V/PT's Parallel Master Port (PMP) with dual read/write buffers interfaces directly to small TFT LCD panels without an external graphics controller. Combined with the 256 KB Flash and 32 KB SRAM, the part can drive a QVGA (320x240) panel with a small widget library and touch input over SPI. The 100-pin TQFP provides the 16-bit PMP data bus plus dedicated control lines and touch SPI without pin sharing. PPS enables the designer to remap touch controller chip-select and reset to any GPIO.
推薦
USB Host Mass-Storage Bridge
The PIC32MX550F256L-V/PT's USB OTG controller supports host mode, allowing the device to act as a USB host bridge that exposes a USB flash drive over a downstream UART or SPI to an upstream headless controller. The integrated PHY and full-speed only databus simplify the BOM by removing external transceivers. With 256 KB Flash, the part fits a small USB host stack plus an FAT file system plus a UART command parser. The 100-pin TQFP exposes all required host signals including VBUS and over-current sense.
推薦
Connected Home IoT Gateway
The PIC32MX550F256L-V/PT serves as a low-cost gateway node in connected-home IoT deployments, aggregating sensor data over SPI/I2C peripherals and forwarding it over USB to a Raspberry-Pi-class host or over CAN to an automotive backbone. The 256 KB Flash fits a TLS-lite or simple MQTT client implementation. PPS allows the same firmware binary to target different PCB variants by remapping SPI and I2C assignments without recompiling. The -40C to +105C V grade handles outdoor enclosure environments without derating.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX550F256L-V/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 | PIC32MX550F256LT-V/PT | PIC32MX550F256L-I/PT | PIC32MX570F512L-V/PT | PIC32MX470F512L-V/PT | PIC32MX460F512L-80V/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-100 (PT), 12x12 mm | TQFP-100 (PT), 12x12 mm | TQFP-100 (PT), 12x12 mm | TQFP-100 (PT), 12x12 mm | TQFP-100 (PT), 12x12 mm | TQFP-100 (PT), 12x12 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 128 KB | 32 KB |
| Maximum CPU Speed | 50 MHz (83 DMIPS) | 50 MHz | 50 MHz | 50 MHz | 120 MHz | 80 MHz |
| USB Controller | 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 2.0B | Yes (DeviceNet) | Yes (DeviceNet) | Yes (DeviceNet) | Yes (DeviceNet) | No | No |
| Operating Temperature | -40C to +105C (V grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +105C (V grade) | -40C to +105C (V grade) |
| AEC-Q100 Qualified | Yes | Yes | No | Yes | Yes | Yes |
主要差異化特點
- AEC-Q100 qualified with -40C to +105C V grade (對比PIC32MX550F256L-I/PT)
- Drop-in scalability within PIC32MX5XX family (對比PIC32MX570F512L-V/PT)
- Integrated USB OTG + CAN 2.0B in a single 100-pin MCU (對比PIC32MX460F512L-80V/PT)
設計說明
Place a 10uF bulk plus 0.1uF decoupling pair near each VDD/VDDUSB/VDDCORE pin. The PIC32MX550F256L-V/PT has separate analog and digital supply rails (AVDD/AVSS, VDD/VSS); tying the analog supply through a ferrite bead to the digital supply avoids digital switching noise coupling into the ADC reference. Bulk capacitance should be low-ESR ceramic (X7R/X5R) located within 5 mm of the supply pin.
Route the 48 MHz primary oscillator trace with symmetric trace length and a continuous ground pour on both sides; keep the trace at least 3x trace-width away from any switching signal. USB D+/D- traces must be 90 ohm differential with matched length within 150 mil, and must not cross any other signal trace on adjacent layers without a ground plane between them. PPS re-mapped signals should be assigned to GPIO clusters that share the same peripheral group to keep firmware ISR latency predictable.
At 50 MHz with all peripherals active, the PIC32MX550F256L-V/PT dissipates approximately 60 mA at 3.3 V, well within the 100-pin TQFP thermal envelope. For automotive engine-bay designs at 105C ambient, derate by ensuring the VDD rail stays above 2.5 V and the MCU core does not exceed 85% duty cycle at peak load. The TQFP-100 (12x12 mm) pad provides a thermal resistance theta-JA of approximately 50 C/W on a 2-layer JEDEC test PCB; adding thermal vias under the exposed die-attach pad is not applicable since this package has no thermal pad.
Do not skip the configuration-bit settings for the primary oscillator and the watchdog timer; Microchip's XC32 compiler projects ship with default config bits that disable the PLL on certain families. Also, the USB D+ pin requires a 1.5 kohm pull-up to VDDUSB to signal connect state to the host; leaving this pull-up off results in the host failing to enumerate the device. Lastly, when migrating from the -I grade to the -V grade, double-check that all peripheral current ratings in the datasheet's electrical characteristics table support the extended 105C range.
合規資訊
RoHS compliant per Microchip product page; AEC-Q100 qualified for automotive applications per the -V grade. Lead-free and halogen-free per Microchip's environmental compliance data.
