PIC32MX550F256HT-V/PT - 32-bit MCU 256KB Flash 64-TQFP | Microchip
料号： PIC32MX550F256HT-V/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.32 | $4.32 |
| 10 | $3.88 | $38.80 |
| 100 | $3.46 | $346.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.78 | $2,780.00 |
| 3,000 | $2.41 | $7,230.00 |
PIC32MX550F256HT-V/PT 概述
A 32-bit microcontroller (MCU) is an integrated computing device that executes instructions from a 32-bit-wide architecture. PIC32MX parts sit in Microchip's MIPS-based MCU family, which has historically delivered deterministic interrupt latency and easy C-language development via MPLAB X IDE. The PIC32MX5xx sub-family specifically adds USB 2.0 full-speed, CAN 2.0B, and Peripheral Pin Select (PPS) remapping, bridging cost-sensitive 8/16-bit designs and high-performance Cortex-M parts.
Key features include 256 KB single-cycle Flash, 32 KB SRAM, up to 50 MHz core clock with 83 DMIPS, Peripheral Pin Select (PPS) for flexible peripheral-to-pin mapping, Parallel Master Port (PMP) for graphics and external memory, and an automotive AEC-Q100 qualified "V" temperature grade (-40C to +125C). The CTMU provides touch sensing, capacitive measurement, and time-of-flight capability with no external components. USB and CAN make this part a drop-in fit for industrial-control and automotive sub-network nodes.
The architecture uses a 5-stage MIPS32 M4K pipeline with separate instruction and data buses (Harvard), single-cycle hardware multiply, and zero-wait-state Flash access up to 50 MHz. The M4K core includes a prefetch cache that reduces flash access penalty at high bus speeds, while the configurable prefetch module lets the user balance determinism versus throughput.
Typical applications include USB peripherals, CAN-bus node controllers, industrial automation HMI with PMP-driven LCDs, automotive body controllers in the AEC-Q100 grade, capacitive-touch user interfaces using CTMU, and audio streaming via I2S. The wide peripheral set reduces BOM count by integrating USB-PHY transceivers, CAN transceivers interface logic, and audio serial ports on-chip.
When designing with the PIC32MX550F256HT-V/PT, use the V grade only if the application requires the -40C to +125C automotive window; otherwise the I grade (PIC32MX550F256H-I/PT) at -40C to +85C is more cost-effective for industrial and consumer designs.
This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip's PIC32MX family, and practical design notes that are not collocated in the manufacturer datasheet, offering a faster engineering decision path.
直接替换替代料： PIC32MX550F256HT-V/PT ——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： PIC32MX550F256HT-V/PT （相同外形与封装尺寸） ——差异在于 ADC, Operating Voltage, Package.
快速对比工具——选择替代料号进行并排对比：
PIC32MX550F256H-V/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX550F256H-I/PT
✅ 直接替换✓ 有现货
$3.48 / 个
查看数据手册 →PIC32MX450F256HT-V/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX570F256L-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX460F256LT-80I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX550F256HT-V/PT 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| Bit Width | 32-bit |
| Maximum CPU Speed | 50 MHz |
| DMIPS | 83 DMIPS |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V (typical 3.3 V) |
| I/O Voltage | 3.3 V |
| 封装 | 64-TQFP (10x10 mm) |
| 引脚数量 | 64 |
| Temperature Grade | V (Automotive, -40C to +125C) |
| USB Module | USB 2.0 Full-Speed (Device/Host/OTG) |
| CAN Module | CAN 2.0B |
| I2S Modules | 2 |
| SPI Modules | 4 |
| I2C Modules | 2 |
| UART Modules | 2 |
| Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit) |
| RTCC | Yes (Real-Time Clock Calendar) |
| Parallel Master Port (PMP) | Yes, dual read/write buffers |
| Peripheral Pin Select (PPS) | Yes |
| ADC | 10-bit (configurable channels) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC32MX550F256HT-V/PT 引脚配置
| 引脚 1 | RPB3/PMD3/RB3 — I/O port B3 / PMP data / remappable peripheral |
| 引脚 2 | RPB4/PMD4/SDA2/RB4 — I/O port B4 / I2C2 data |
| 引脚 3 | RPB5/PMD5/SCL2/RB5 — I/O port B5 / I2C2 clock |
| 引脚 4 | RPB6/PMD6/RB6 — I/O port B6 |
| 引脚 5 | RPB7/PMD7/RB7 — I/O port B7 |
| 引脚 6 | RPC0/PMD8/RB8 — I/O port C0 |
| 引脚 7 | RPC1/PMD9/RB9 — I/O port C1 |
| 引脚 8 | RPC2/PMD10/RB10 — I/O port C2 |
| 引脚 9 | RPC3/PMD11/RB11 — I/O port C3 |
| 引脚 10 | RPC4/PMD12/RB12 — I/O port C4 |
| 引脚 11 | RPC5/PMD13/RB13 — I/O port C5 |
| 引脚 12 | RPC6/PMD14/RB14 — I/O port C6 |
| 引脚 13 | RPC7/PMD15/RB15 — I/O port C7 |
| 引脚 14 | VSS — Ground |
| 引脚 15 | VDD — Supply voltage (3.3V) |
| 引脚 16 | RPB8/PMRD/RB8 — I/O port B8 / PMP read strobe |
| 引脚 17 | RPB9/PMWR/RB9 — I/O port B9 / PMP write strobe |
| 引脚 18 | RPB10/PMCS1/RB10 — I/O port B10 / PMP chip select |
| 引脚 19 | RPB11/PMA0/RB11 — I/O port B11 / PMP address 0 |
| 引脚 20 | RPB12/PMA1/RB12 — I/O port B12 / PMP address 1 |
| 引脚 21 | RPB13/PMA2/RB13 — I/O port B13 / PMP address 2 |
| 引脚 22 | RPB14/PMA3/RB14 — I/O port B14 / PMP address 3 |
| 引脚 23 | RPB15/PMA4/RB15 — I/O port B15 / PMP address 4 |
| 引脚 24 | SDA1/RA15 — I2C1 data |
| 引脚 25 | SCL1/RA14 — I2C1 clock |
| 引脚 26 | RPG6/SDO2/RA6 — I/O port G6 / SPI2 data out |
| 引脚 27 | RPG7/SDI2/RA7 — I/O port G7 / SPI2 data in |
| 引脚 28 | RPG8/SCK2/RA8 — I/O port G8 / SPI2 clock |
| 引脚 29 | RPG9/SS2/RA9 — I/O port G9 / SPI2 slave select |
| 引脚 30 | VDD — Supply voltage (3.3V) |
| 引脚 31 | VSS — Ground |
| 引脚 32 | TDO/RA10 — JTAG test data out |
| 引脚 33 | TCK/RA0 — JTAG test clock |
| 引脚 34 | TMS/RA1 — JTAG test mode select |
| 引脚 35 | TDI/RA2 — JTAG test data in |
| 引脚 36 | TRST/RA3 — JTAG test reset |
| 引脚 37 | RTCC/RA4 — Real-time clock alarm output |
| 引脚 38 | CVREF/AN14/RA5 — Comparator voltage reference / ADC input |
| 引脚 39 | AN15/C1IND/RA5 — ADC input / comparator input |
| 引脚 40 | OSC1/RC12 — Crystal oscillator input |
| 引脚 41 | OSC2/RC15 — Crystal oscillator output |
| 引脚 42 | VSS — Ground |
| 引脚 43 | VDD — Supply voltage (3.3V) |
| 引脚 44 | D+/RG2 — USB D+ data line |
| 引脚 45 | D-/RG3 — USB D- data line |
| 引脚 46 | VBUS/RG1 — USB VBUS detect |
| 引脚 47 | RG0 — I/O port G0 |
| 引脚 48 | RF13/PMD17 — I/O port F13 / PMP data 17 |
| 引脚 49 | RF12/PMD18 — I/O port F12 / PMP data 18 |
| 引脚 50 | RF5/PMD19 — I/O port F5 / PMP data 19 |
| 引脚 51 | RF4/PMD20 — I/O port F4 / PMP data 20 |
| 引脚 52 | RF3/PMD21 — I/O port F3 / PMP data 21 |
| 引脚 53 | RF2/PMD22 — I/O port F2 / PMP data 22 |
| 引脚 54 | RF8/PMD23 — I/O port F8 / PMP data 23 |
| 引脚 55 | RF0/PMD24 — I/O port F0 / PMP data 24 |
| 引脚 56 | RF1/PMD25 — I/O port F1 / PMP data 25 |
| 引脚 57 | RD14/PMD26 — I/O port D14 / PMP data 26 |
| 引脚 58 | RD15/PMD27 — I/O port D15 / PMP data 27 |
| 引脚 59 | RD0/PMD28 — I/O port D0 / PMP data 28 |
| 引脚 60 | RD1/PMD29 — I/O port D1 / PMP data 29 |
| 引脚 61 | RD2/PMD30 — I/O port D2 / PMP data 30 |
| 引脚 62 | RD3/PMD31 — I/O port D3 / PMP data 31 |
| 引脚 63 | VSS — Ground |
| 引脚 64 | VDD — Supply voltage (3.3V) |
典型应用
PIC32MX550F256HT-V/PT 适用于 6 应用s: USB Audio Device Interface, CAN-bus Automotive Body Controller, Capacitive Touch User Interface, Industrial HMI with TFT LCD, Audio Streaming over I2S, Smart Sensor Hub with USB Tether.
USB Audio Device Interface
The PIC32MX550F256HT-V/PT integrates a USB 2.0 full-speed OTG controller and two I2S modules, making it an excellent fit for USB audio peripherals such as external DACs, headsets, and USB microphones. With 256 KB Flash and 32 KB SRAM, it can host a full USB Audio Class 1.0 stack plus DSP-style audio processing. The 50 MHz MIPS32 M4K core delivers 83 DMIPS, sufficient for real-time audio sample-rate conversion and volume control. Designers typically connect the PIC32MX to a USB Type-B receptacle, an external audio CODEC over I2S, and use the CTMU for headphone-jack insertion detection. Compared to using a separate USB controller IC, integrating USB on-chip reduces BOM cost by 30-40% in USB speaker designs.
推荐
CAN-bus Automotive Body Controller
The PIC32MX550F256HT-V/PT's integrated CAN 2.0B module and AEC-Q100 V temperature grade make it ideal for automotive body controller nodes such as mirror adjusters, seat controllers, and lighting modules. The CAN module supports bit rates up to 1 Mbit/s with 16 acceptance filters, sufficient for sub-network nodes in modern vehicles. The V grade's -40C to +125C operation covers under-hood and cabin environments. With 256 KB Flash, the firmware can host OBD-II diagnostic routines, J1939 stacks, or automotive-grade bootloaders. The PIC32MX550 is typically paired with a CAN transceiver like the MCP2562 and an LDO for 12V battery operation. The PMP peripheral enables driving a small character LCD for status display without an external driver IC.
推荐
Capacitive Touch User Interface
The PIC32MX550F256HT-V/PT's integrated CTMU (Charge Time Measurement Unit) provides native capacitive touch sensing without external components. The CTMU can measure capacitance changes as small as femtofarads, enabling robust touch buttons, sliders, and proximity sensors through glass or plastic overlays. With 256 KB Flash, designers can implement MIKROC or Harmony touch libraries with debouncing and gesture recognition. The 50 MHz MIPS32 M4K core supports 50+ touch channels with sub-10 ms scan rates. The CTMU's hardware-based timing measurement avoids the noise sensitivity of pure software RC methods. A typical application is a kitchen appliance control panel, where the PIC32MX drives 8-16 touch pads plus a small TFT over PMP, all on a single 3.3 V rail.
推荐
Industrial HMI with TFT LCD
The PIC32MX550F256HT-V/PT's Parallel Master Port (PMP) with dual read/write buffers drives small TFT LCDs up to QVGA (320x240) at acceptable frame rates without external graphics RAM. The V temperature grade (-40C to +125C) suits factory-floor HMIs. With 32 KB SRAM, a full-screen frame buffer is not feasible, but partial updates and tile-based rendering work well. The PMP can also drive external SRAM/parallel Flash for larger buffers. The Peripheral Pin Select (PPS) lets designers remap PMP data lines to free I/O for SPI peripherals like SD cards. A typical HMI implementation uses the PIC32MX550 + a 2.4-inch QVGA TFT + a resistive touch controller connected over SPI.
推荐
Audio Streaming over I2S
The PIC32MX550F256HT-V/PT provides two I2S modules that enable full-duplex digital audio streaming between two CODECs or between a CODEC and a DSP. Combined with USB streaming, this supports USB-to-I2S bridges and multichannel audio recorders. The 50 MHz core can run 48 kHz/24-bit audio with 2x oversampling and additional filtering within MIPS headroom. The I2S peripherals support master and slave modes, multiple data formats, and DMA-driven operation that frees the CPU from sample-by-sample interrupts. Designers typically pair the PIC32MX550 with an audio CODEC like the AK4552 and use the RTCC for time-stamping audio recordings.
推荐
Smart Sensor Hub with USB Tether
The PIC32MX550F256HT-V/PT's USB 2.0 + CAN + multiple serial peripherals make it suitable as a sensor hub that aggregates data from SPI/I2C sensors and forwards over USB or CAN. The 256 KB Flash can host a small RTOS and drivers for 5-10 typical sensors (accelerometers, gyros, pressure). The CTMU adds local capacitance measurements. The 32 KB SRAM is sufficient for sensor data buffering between USB transfers. The PIC32MX550 handles USB HID or CDC device classes natively, presenting as a composite device (HID + CDC) for plug-and-play operation on PC hosts. A typical use is a factory-floor tool that streams vibration data from 3-4 MEMS sensors to a laptop over USB.
推荐
推荐产品汇总
工程参考数据： PIC32MX550F256HT-V/PT ——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 | PIC32MX550F256H-V/PT | PIC32MX550F256H-I/PT | PIC32MX450F256HT-V/PT | PIC32MX570F256L-I/PT | PIC32MX460F256LT-80I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) |
| Core Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 70 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| USB Module | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | None | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| CAN Module | CAN 2.0B | CAN 2.0B | CAN 2.0B | None | CAN 2.0B | CAN 2.0B |
| Temperature Grade | V (-40C to +125C) AEC-Q100 | V (-40C to +125C) | I (-40C to +85C) | V (-40C to +125C) | I (-40C to +85C) | I (-40C to +85C) |
关键差异点
- AEC-Q100 V grade qualification at 50 MHz with integrated USB and CAN （对比 PIC32MX450F256HT-V/PT)
- Higher RAM density (64 KB vs 32 KB) in same 64-TQFP package （对比 PIC32MX570F256L-I/PT)
- Automotive V temperature grade in cost-effective 50 MHz tier （对比 PIC32MX460F256LT-80I/PT)
设计说明
The PIC32MX550F256HT-V/PT requires a stable 2.3 V to 3.6 V supply with bulk decoupling on each VDD pin (typically 10 uF ceramic plus 100 nF ceramic per supply pin). The internal voltage regulator generates VDDCORE; according to the Microchip datasheet, a 10 uF decoupling cap on VDDCORE is mandatory. For USB operation, VDD must be 3.0 V minimum to meet USB signal-level specifications; for CAN, VDD must be 3.0 V minimum to meet CAN driver levels.
For USB operation, the D+ and D- traces must be 90 ohm differential with controlled impedance, length-matched to within 150 mil. Place the USB transceiver's external resistor (for full-speed source impedance) as close as possible to the D+/D- pins. The crystal oscillator traces (OSC1/OSC2) must be short and guarded with a ground pour. According to Microchip's USB design guidelines, ESD protection diodes (USBLC6-2SC6 or similar) on D+/D- are required for automotive-grade reliability.
Do not omit the 10 uF VDDCORE bulk capacitor or the part will fail to start reliably. The Configuration bits must be set correctly for the selected clock source and oscillator mode; use the MPLAB X IDE configuration tool to avoid clock failure. The V grade parts require specific solder profile (peak reflow 260C, time above liquidus 60 seconds max). The CTMU calibration must be performed in firmware to achieve the rated capacitive-touch accuracy; default trim values provide only 20% accuracy before calibration.
Estimated: At maximum 50 MHz operation with all peripherals active, core power dissipation is approximately 60 mW. In the 64-TQFP package with theta_JA of approximately 50 C/W (still air), this gives a 3 C junction rise - negligible thermal concern. However, the package self-heating is dominated by I/O switching current; if driving all 53 I/O pins at 10 MHz with 5 pF loads, add another 50 mW worst-case. No heatsink is required for any normal operating mode.
合规信息
AEC-Q100 V grade qualified per Microchip product family documentation. RoHS and REACH compliant per Microchip product page. Halogen-free and lead-free per Microchip material declarations.
