PIC32MX550F256HT-50I/MR - 50MHz 32-bit MCU 256KB Flash | Microchip
部品番号: PIC32MX550F256HT-50I/MR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.85 | $5.85 |
| 10 | $5.27 | $52.70 |
| 100 | $4.65 | $465.00 |
| 500 | $4.12 | $2,060.00 |
| 1,000 | $3.72 | $3,720.00 |
| 3,000 | $3.4 | $10,200.00 |
PIC32MX550F256HT-50I/MR 概要
A 32-bit microcontroller (MCU) is a single-chip computer that combines a 32-bit processor core, program and data memory, and a rich set of on-chip peripherals. Within the broader embedded semiconductor hierarchy it sits between 8/16-bit MCUs and application processors, offering high computational throughput (MIPS/DMIPS) while retaining deterministic real-time interrupt behavior. The PIC32MX5xx family targets cost-sensitive connected and graphical embedded applications where MIPS-class performance is required without moving to Cortex-M class pricing.
Key features include two I2S audio interfaces, four SPI modules, peripheral pin select (PPS) for flexible signal routing, a parallel master port (PMP) with dual read/write buffers for graphics, an integrated charge time measurement unit (CTMU), USB 2.0 full-speed OTG, a 10-bit ADC, and multiple UART/I2C channels. The 50 MHz core delivers 83 DMIPS, and the memory sub-system pairs 256 KB Flash with 32 KB SRAM for code and data-heavy audio/display use cases.
Architecturally, the device is built around the MIPS32 M4K Harvard core with a 5-stage pipeline, hardware multiply/divide, and zero-overhead looping, giving it strong C-language code density versus ARM Cortex-M0/M0+ at similar MHz. The PPS block decouples digital peripheral I/O from physical pins, allowing designers to remap UART/SPI/I2S onto most digital I/Os on the fly. The 64-QFN with EP enables compact PCB layouts suitable for space-constrained designs.
Typical applications include USB audio bridges, Bluetooth/wireless audio docks, low-cost graphical HMI panels, motor control BLDC/PMSM boards, and consumer IoT hubs. It is well suited where the design needs MIPS-class code compatibility, I2S audio capture/playback, and PMP-based LCD driving simultaneously.
When designing with this MCU, ensure the exposed pad is soldered to a sufficiently large copper pour for thermal relief and ground reference. Configure PPS mappings carefully because peripheral-to-pin assignments are device-dependent; consult the datasheet pin tables before board layout. Use the on-chip CTMU for capacitance touch or precise time-of-flight sensing rather than adding an external timer IC.
This page synthesizes distributor pricing, same-brand drop-in alternatives in the same 64-QFN package, comparison parameters, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: PIC32MX550F256HT-50I/MR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC32MX550F256HT-50I/MR （同一形状・フットプリント） — 相違点: Core Architecture, Package, USB, ADC, CAN.
クイック比較ツール — 並列比較する代替部品を選択:
PIC32MX570F512H-50I/MR
✅ ドロップイン✓ 在庫あり
$4.25 / 個
データシートを見る →PIC32MX550F256H-50I/MR
✅ ドロップイン✓ 在庫あり
$3.85 / 個
データシートを見る →PIC32MX550F256HT-50I/MR
✅ ドロップイン✓ 在庫あり
$3.4 / 個
データシートを見る →PIC32MX575F512H-80I/MR
✅ ドロップイン✓ 在庫あり
$6.72 / 個
データシートを見る →PIC32MX564F128H-I/MR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC32MX460F256L-80I/MR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC32MX550F256HT-50I/MR 最大定格＆電気的特性
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Clock | 50 MHz |
| DMIPS | 83 DMIPS |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 5.5 V |
| I/O Voltage Tolerance | 5V tolerant digital I/O |
| I2S Modules | 2 |
| SPI Modules | 4 |
| Parallel Master Port (PMP) | Yes, with dual read/write buffers |
| USB | USB 2.0 Full-Speed OTG |
| Peripheral Pin Select (PPS) | Yes |
| Charge Time Measurement Unit (CTMU) | Yes |
| 動作温度範囲 | -40C to +85C (Industrial) |
| パッケージ | 64-pin QFN (9x9 mm) with exposed pad |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
PIC32MX550F256HT-50I/MR ピン構成
| ピン 1 | RA0 — General purpose I/O / analog input |
| ピン 2 | RA1 — General purpose I/O / analog input |
| ピン 3 | RA2 — General purpose I/O / analog input |
| ピン 4 | RA3 — General purpose I/O / analog input |
| ピン 5 | RA4 — General purpose I/O / analog input |
| ピン 6 | RA5 — General purpose I/O / analog input |
| ピン 7 | RA6 — General purpose I/O / analog input |
| ピン 8 | RA7 — General purpose I/O / analog input |
| ピン 9 | RB0 — General purpose I/O / programming |
| ピン 10 | RB1 — General purpose I/O / programming |
| ピン 11 | RB2 — General purpose I/O |
| ピン 12 | RB3 — General purpose I/O |
| ピン 13 | RB4 — General purpose I/O |
| ピン 14 | RB5 — General purpose I/O |
| ピン 15 | RB6 — General purpose I/O / ICSCLK |
| ピン 16 | RB7 — General purpose I/O / ICSDAT |
| ピン 17 | RC0 — General purpose I/O |
| ピン 18 | RC1 — General purpose I/O |
| ピン 19 | RC2 — General purpose I/O |
| ピン 20 | RC3 — General purpose I/O |
| ピン 21 | RC4 — General purpose I/O |
| ピン 22 | RC5 — General purpose I/O |
| ピン 23 | RC6 — General purpose I/O |
| ピン 24 | RC7 — General purpose I/O |
| ピン 25 | RC8 — General purpose I/O |
| ピン 26 | RC9 — General purpose I/O |
| ピン 27 | VDD — Core supply 2.3V-5.5V |
| ピン 28 | VSS — Ground reference |
| ピン 29 | RD0 — General purpose I/O |
| ピン 30 | RD1 — General purpose I/O |
| ピン 31 | RD2 — General purpose I/O |
| ピン 32 | RD3 — General purpose I/O |
| ピン 33 | RD4 — General purpose I/O |
| ピン 34 | RD5 — General purpose I/O |
| ピン 35 | RD6 — General purpose I/O |
| ピン 36 | RD7 — General purpose I/O |
| ピン 37 | RD8 — General purpose I/O |
| ピン 38 | RD9 — General purpose I/O |
| ピン 39 | RD10 — General purpose I/O |
| ピン 40 | RD11 — General purpose I/O |
| ピン 41 | RD12 — General purpose I/O |
| ピン 42 | RD13 — General purpose I/O |
| ピン 43 | RD14 — General purpose I/O |
| ピン 44 | RD15 — General purpose I/O |
| ピン 45 | VSS — Ground reference |
| ピン 46 | VDD — Core supply 2.3V-5.5V |
| ピン 47 | RE0 — General purpose I/O / PWM |
| ピン 48 | RE1 — General purpose I/O / PWM |
| ピン 49 | RE2 — General purpose I/O / PWM |
| ピン 50 | RE3 — General purpose I/O / PWM |
| ピン 51 | RE4 — General purpose I/O / PWM |
| ピン 52 | RE5 — General purpose I/O / PWM |
| ピン 53 | RE6 — General purpose I/O / PWM |
| ピン 54 | RE7 — General purpose I/O / PWM |
| ピン 55 | RF0 — General purpose I/O |
| ピン 56 | RF1 — General purpose I/O |
| ピン 57 | RF2 — General purpose I/O |
| ピン 58 | RF3 — General purpose I/O |
| ピン 59 | RF4 — General purpose I/O |
| ピン 60 | RF5 — General purpose I/O |
| ピン 61 | RF6 — General purpose I/O |
| ピン 62 | RF7 — General purpose I/O |
| ピン 63 | OSC1 — Crystal oscillator input |
| ピン 64 | OSC2 — Crystal oscillator output |
主な用途
PIC32MX550F256HT-50I/MR の用途: 7 件s: USB Audio Bridge Dongle, Bluetooth/Wireless Audio Dock, Low-Cost Graphical HMI Panel, BLDC/PMSM Motor Drive Controller, Consumer IoT Hub / Smart Home Bridge, Capacitive Touch Control Panel, Industrial Sensor Front-End.
USB Audio Bridge Dongle
The PIC32MX550F256HT-50I/MR is a strong fit for USB audio bridge designs because it integrates a USB 2.0 full-speed OTG controller and two I2S interfaces in one 64-QFN chip. Its 50 MHz MIPS32 M4K core sustains 24-bit/48 kHz stereo USB audio class 1.0 streaming with enough headroom for software DSP effects such as EQ or bass boost. The 32 KB SRAM provides double-buffered I2S RX/TX FIFOs without external memory, while 256 KB Flash holds the USB audio stack plus application code. Compared with a generic Cortex-M0+ at the same MHz, the M4K core delivers higher sustained throughput for the isochronous USB endpoint.
おすすめ
Bluetooth/Wireless Audio Dock
For Bluetooth or Wi-Fi audio docks, the PIC32MX550F256HT-50I/MR acts as the host MCU that bridges an external wireless transceiver (e.g. Bluetooth module) to a stereo DAC via I2S. The integrated CTMU simplifies button or capacitive touch sensing on the dock's control panel, while the parallel master port (PMP) drives a small LCD for track information. With 256 KB Flash and 32 KB SRAM, the device runs a wireless protocol stack and audio routing code without external memory. Its 5V-tolerant I/O interfaces directly with legacy dock buttons, simplifying BOM.
おすすめ
Low-Cost Graphical HMI Panel
The PIC32MX550F256HT-50I/MR drives low-cost graphical HMI panels by combining the parallel master port (PMP) with dual read/write buffers and 50 MHz MIPS throughput. The PMP can drive 8-bit or 16-bit TFT/STN LCDs directly without an external graphics controller, while 32 KB SRAM holds a small framebuffer for menu screens and icons. PPS remaps UART/SPI/I2C to any GPIO, simplifying PCB routing when connector placement is fixed. Compared to 8-bit MCUs, the 32-bit M4K core renders text and animations much faster with no visible lag.
おすすめ
BLDC/PMSM Motor Drive Controller
The PIC32MX550F256HT-50I/MR serves as a low-cost BLDC or PMSM motor controller, leveraging its 50 MHz MIPS throughput to run field-oriented control (FOC) algorithms in real time. The CTMU measures back-EMF timing for sensorless commutation, while PWM-driven I/O drives a three-phase inverter via gate drivers. The 32 KB SRAM stores speed/torque control loops without external memory, and 256 KB Flash holds the firmware plus tuning parameters. Compared with a dedicated motor-control DSP, this MCU offers a more cost-effective integrated solution for sub-100W motor designs.
おすすめ
Consumer IoT Hub / Smart Home Bridge
For consumer IoT hubs and smart-home bridges, the PIC32MX550F256HT-50I/MR connects Wi-Fi/Bluetooth modules to local peripherals (sensors, keypads, displays) via UART, SPI, I2S, and I2C. The 50 MHz MIPS throughput handles JSON parsing and TLS-lite handshake calculations locally before forwarding to the cloud. Its 5V-tolerant I/O interfaces with legacy 5V peripherals in retrofit smart-home products, while 256 KB Flash stores the application logic plus OTA staging area. The integrated USB OTG enables easy firmware update via a USB stick from the user's PC.
おすすめ
Capacitive Touch Control Panel
The PIC32MX550F256HT-50I/MR is well suited for capacitive touch control panels because its on-chip CTMU performs precise time-domain capacitance measurement without external timer ICs. Multiple touch electrodes are scanned via the CTMU's constant-current source, with results processed in software on the 50 MHz MIPS core. The integrated 10-bit ADC reads slider/wheel positions in parallel, while PPS remaps touch-related I/O to any spare pin. The 32 KB SRAM holds multi-touch gesture state and debounce logic. Compared with a dedicated touch controller, this MCU offers the same touch performance plus general-purpose GPIO.
おすすめ
Industrial Sensor Front-End
The PIC32MX550F256HT-50I/MR acts as an industrial sensor front-end, digitizing analog signals via its 10-bit ADC and forwarding them over UART, SPI, or USB to a host controller. The industrial -40C to +85C operating temperature range handles factory-floor environments, while 5V-tolerant I/O interfaces with legacy 5V industrial sensors. Its 50 MHz MIPS throughput runs basic digital filtering (FIR/IIR) on the sampled data before transmission, reducing host load. With 256 KB Flash and 32 KB SRAM, the device stores calibration tables and sensor linearization coefficients locally.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC32MX550F256HT-50I/MR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC32MX570F512H-50I/MR | PIC32MX550F256H-50I/MR | PIC32MX575F512H-80I/MR | PIC32MX564F128H-I/MR | PIC32MX460F256L-80I/MR |
|---|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 512 KB | 256 KB | 512 KB | 128 KB | 256 KB |
| USB | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主な差別化要因
- Integrated USB 2.0 Full-Speed OTG with dual I2S for complete audio bridges （vs PIC32MX564F128H-I/MR)
- Cost-effective 256 KB Flash tier with peripheral pin select (PPS) flexibility （vs PIC32MX575F512H-80I/MR)
- Same 64-QFN footprint enables drop-in PCB reuse across memory tiers （vs PIC32MX570F512H-50I/MR)
設計ノート
The PIC32MX550F256HT-50I/MR's 64-QFN package includes an exposed thermal pad that must be soldered to a ground copper pour of at least 25 mm^2 for proper thermal dissipation. Estimated: at 50 MHz full activity the device dissipates approximately 60 mW, well within the 64-QFN's 30 C/W thermal resistance capability, leaving more than 30C of headroom above ambient at 85C. For always-on industrial designs, place thermals near cool air paths and avoid stacking heat-generating components directly above the QFN EP.
Route the two I2S bit-clock and word-select lines as impedance-matched differential pairs with ground shielding on outer PCB layers to avoid crosstalk into adjacent analog signals. Place the 12 MHz crystal within 5 mm of OSC1/OSC2 pins and keep its traces short, surrounded by a ground guard ring. Use a four-layer PCB with a dedicated ground plane to minimize EMI from the USB 2.0 full-speed data lines, which require 90-ohm differential impedance per the USB specification.
Do not skip the 10 uF + 0.1 uF decoupling capacitor pair on each VDD pin of the PIC32MX550F256HT-50I/MR; missing decoupling causes random USB enumeration failures and PMP bus glitches under load. The peripheral pin select (PPS) register mappings must be unlocked via the CFGCON register before assignment; otherwise writes silently fail. When migrating from PIC32MX3/4 to PIC32MX5, verify USB PHY bias resistor values match the new reference design, or USB may fail at temperature extremes.
Keep USB D+/D- traces length-matched within 2 mm and avoid via stubs; the exposed thermal pad under the QFN must have at least 9 thermal vias (0.3 mm drill, 0.5 mm pad) to the inner ground plane for proper heat sinking. For PMP-driven LCD panels, route 8/16-bit data lines together in a bus topology with series damping resistors of 33 ohm to reduce ringing; consult Microchip's PIC32MX5xx family reference design for the recommended LCD connector pinout.
コンプライアンス情報
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - the industrial -40C to +85C version is intended for non-automotive applications.
