PIC32MX550F256H-50I/MR - 50MHz 256KB Flash 32-bit MCU | Microchip
MPN: PIC32MX550F256H-50I/MR ✓ Hoạt độngPIC32MX550F256H-50I/MR Tóm tắt
A 32-bit microcontroller (MCU) is an integrated processor core, program memory, data memory, and peripherals on a single die. Within the broader taxonomy of embedded semiconductors, this device belongs to the application-specific microcontroller category, which itself sits inside the integrated circuit (IC) hierarchy of power-managed mixed-signal processors used in embedded systems. Microcontrollers in the PIC32MX class target HMI (human-machine interface) applications with audio, graphics, and touch peripherals.
Key differentiating features include Peripheral Pin Select (PPS) for flexible signal routing, dual CAN 2.0B modules with DeviceNet addressing, 16-channel 10-bit ADC at 1 Msps, and a Charge Time Measurement Unit (CTMU) for capacitive touch. The integrated USB 2.0 Full-Speed OTG controller enables device/host/OTG roles without external PHY. The 64-pin QFN package supports compact PCB layouts while exposing ample I/O for parallel interfaces.
Architecturally, the device uses a MIPS32 M4K Harvard-style core with 5-stage pipeline, separate instruction and data paths, hardware multiply/divide, and zero overhead looping. The 50 MHz core provides 83 DMIPS, sufficient for protocol stacks and moderate DSP loads. The integrated DMA controller offloads data movement from the CPU.
Typical applications include industrial control with CAN bus connectivity, USB-based human interface devices, audio playback systems using I2S codecs, and low-cost graphics terminals with PMP-driven LCDs. The PPS remapping and dual CAN modules make it suitable for automotive body electronics and building automation.
When designing with this MCU, allocate at least one 10uF bulk and one 0.1uF decoupling capacitor adjacent to each power pin pair, route the 50 MHz crystal traces symmetrically, and use a 4-layer PCB with continuous ground pour under the QFN thermal pad to manage dissipation.
This page consolidates distributor pricing, drop-in same-package alternates, and practical design considerations beyond the manufacturer datasheet to accelerate sourcing and design-in decisions.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX550F256H-50I/MR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC32MX550F256H-50I/MR (cùng hình factor và footprint) — khác nhau ở Package, USB, Operating Temperature, Parallel Master Port (PMP), ADC.
PIC32MX570F512H-50I/MR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX550F256H-50I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX550F256HT-50I/MR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX550F256H-V/MR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX570F512L-50I/MR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256H-50I/MR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX550F256H-50I/MR Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Frequency | 50 MHz |
| DMIPS | 83 DMIPS |
| Program Flash Memory | 256 KB (256K x 8) |
| Data SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Hộp | 64-pin QFN (9x9 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| USB | USB 2.0 Full-Speed OTG controller |
| CAN | CAN 2.0B active with DeviceNet addressing |
| I2S / SPI | Two I2S and up to four SPI modules |
| PMP | Parallel Master Port with dual read/write buffers |
| Peripheral Pin Select | Yes (PPS remap) |
| ADC | 10-bit, up to 1 Msps, 16 channels |
| Touch Sensing | CTMU (Capacitive Touch) |
| DMA | Yes |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
Cấu hình chân PIC32MX550F256H-50I/MR
| Chân 1 | RB15 — I/O port B bit 15 |
| Chân 2 | VSS — Ground reference |
| Chân 3 | VDD — Supply voltage 2.3-3.6V |
| Chân 4 | RB14 — I/O port B bit 14 |
| Chân 5 | RB13 — I/O port B bit 13 |
| Chân 6 | RB12 — I/O port B bit 12 |
| Chân 7 | RB11 — I/O port B bit 11 |
| Chân 8 | RB10 — I/O port B bit 10 |
| Chân 9 | RB9 — I/O port B bit 9 |
| Chân 10 | RB8 — I/O port B bit 8 |
| Chân 11 | RB7 — I/O port B bit 7 |
| Chân 12 | RB6 — I/O port B bit 6 |
| Chân 13 | RB5 — I/O port B bit 5 |
| Chân 14 | RB4 — I/O port B bit 4 |
| Chân 15 | RB3 — I/O port B bit 3 |
| Chân 16 | RB2 — I/O port B bit 2 |
| Chân 17 | RB1 — I/O port B bit 1 |
| Chân 18 | RB0 — I/O port B bit 0 |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Supply voltage 2.3-3.6V |
| Chân 21 | RF0 — I/O port F bit 0 |
| Chân 22 | RF1 — I/O port F bit 1 |
| Chân 23 | RD11 — I/O port D bit 11 |
| Chân 24 | RD10 — I/O port D bit 10 |
| Chân 25 | RD9 — I/O port D bit 9 |
| Chân 26 | RD8 — I/O port D bit 8 |
| Chân 27 | RD7 — I/O port D bit 7 |
| Chân 28 | RD6 — I/O port D bit 6 |
| Chân 29 | RD5 — I/O port D bit 5 |
| Chân 30 | RD4 — I/O port D bit 4 |
| Chân 31 | RD3 — I/O port D bit 3 |
| Chân 32 | RD2 — I/O port D bit 2 |
| Chân 33 | RD1 — I/O port D bit 1 |
| Chân 34 | RD0 — I/O port D bit 0 |
| Chân 35 | RC15 — I/O port C bit 15 |
| Chân 36 | RC14 — I/O port C bit 14 |
| Chân 37 | RC13 — I/O port C bit 13 |
| Chân 38 | VSS — Ground reference |
| Chân 39 | VDD — Supply voltage 2.3-3.6V |
| Chân 40 | RC12 — I/O port C bit 12 |
| Chân 41 | RC11 — I/O port C bit 11 |
| Chân 42 | RC10 — I/O port C bit 10 |
| Chân 43 | RC9 — I/O port C bit 9 |
| Chân 44 | RC8 — I/O port C bit 8 |
| Chân 45 | RC7 — I/O port C bit 7 |
| Chân 46 | RC6 — I/O port C bit 6 |
| Chân 47 | RC5 — I/O port C bit 5 |
| Chân 48 | RC4 — I/O port C bit 4 |
| Chân 49 | RC3 — I/O port C bit 3 |
| Chân 50 | RC2 — I/O port C bit 2 |
| Chân 51 | RC1 — I/O port C bit 1 |
| Chân 52 | RC0 — I/O port C bit 0 |
| Chân 53 | RA15 — I/O port A bit 15 |
| Chân 54 | RA14 — I/O port A bit 14 |
| Chân 55 | RA9 — I/O port A bit 9 |
| Chân 56 | RA10 — I/O port A bit 10 |
| Chân 57 | RA7 — I/O port A bit 7 |
| Chân 58 | RA6 — I/O port A bit 6 |
| Chân 59 | RA5 — I/O port A bit 5 |
| Chân 60 | RA4 — I/O port A bit 4 |
| Chân 61 | RA3 — I/O port A bit 3 |
| Chân 62 | RA2 — I/O port A bit 2 |
| Chân 63 | RA1 — I/O port A bit 1 |
| Chân 64 | RA0 — I/O port A bit 0 |
Ứng dụng tiêu biểu
PIC32MX550F256H-50I/MR phù hợp cho 6 Áp dụngs: USB Audio Device (USB Headset / Speakerphone), Industrial CAN Node (Building Automation, Body Electronics), Graphics Terminal with PMP-driven LCD, Capacitive Touch HMI Panel, IoT Sensor Hub with USB Diagnostic Port, Automotive Body Electronics (Non-Circuit Infotainment).
USB Audio Device (USB Headset / Speakerphone)
The PIC32MX550F256H-50I/MR fits USB audio class designs because it integrates a USB 2.0 Full-Speed OTG controller plus two I2S modules, removing the need for a dedicated audio bridge IC. At 50 MHz and 83 DMIPS, the MIPS M4K core comfortably handles isochronous USB audio endpoints, sample-rate conversion, and basic DSP such as AEC or EQ at 48 kHz. The 256 KB Flash accommodates USB stack plus I2S driver, while 64 KB SRAM buffers stereo 16-bit/48 kHz streams without overrun.
Được đề xuất
Industrial CAN Node (Building Automation, Body Electronics)
The PIC32MX550F256H-50I/MR is engineered for CAN-based industrial nodes with its integrated CAN 2.0B active controller supporting DeviceNet addressing filters. Engineers can attach the MCU directly to a CAN transceiver like MCP2551 without an external CAN controller, saving BOM cost. The 50 MHz core and 83 DMIPS run CANopen or DeviceNet stacks with margin for application logic. PPS allows flexible assignment of CAN RX/TX pins, easing PCB layout in dense enclosures.
Được đề xuất
Graphics Terminal with PMP-driven LCD
The PIC32MX550F256H-50I/MR drives small graphical LCDs through its Parallel Master Port (PMP) with dual read/write buffers, allowing sustained frame buffer updates without CPU stall. At 50 MHz, it can refresh QVGA (320x240) panels over an 8-bit PMP bus while leaving headroom for touch processing via the CTMU peripheral. The 64 KB SRAM holds compact frame buffers without external memory. PPS allows flexible mapping of PMP data lines.
Được đề xuất
Capacitive Touch HMI Panel
The PIC32MX550F256H-50I/MR integrates the Charge Time Measurement Unit (CTMU) for self- and mutual-capacitive touch sensing, supporting up to 16 touch channels without an external touch controller. Combined with the on-chip 10-bit ADC, it can read both touch and analog sliders in a single scan cycle. PPS routes the CTMU outputs to any GPIO, which simplifies PCB layout of touch electrodes under a glass overlay.
Được đề xuất
IoT Sensor Hub with USB Diagnostic Port
The PIC32MX550F256H-50I/MR aggregates analog and digital sensors in industrial IoT hubs using its 16-channel 10-bit ADC, four UARTs, and USB OTG for diagnostic access. The 50 MHz core runs MQTT-SN or CoAP stacks over UART-to-WiFi bridges. PPS allows I2C, SPI, and UART to be remapped to any GPIO, enabling flexible sensor board layouts without respinning the PCB.
Được đề xuất
Automotive Body Electronics (Non-Circuit Infotainment)
The PIC32MX550F256H-50I/MR's industrial -40C to +85C rating and CAN 2.0B controller suit body-electronics modules such as seat controllers, mirror adjusters, and lighting nodes when full AEC-Q100 is not required. The integrated PMP and CTMU can drive LED matrix clusters with capacitive touch. The 64-pin QFN package is compact enough for behind-panel mounting in 12V vehicle subsystems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX550F256H-50I/MR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC32MX570F512H-50I/MR | PIC32MX570F512L-50I/MR | PIC32MX450F256H-50I/MR | PIC32MX550F256HT-50I/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (9x9) | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same | 64-pin QFN (9x9) - same |
| Flash Memory | 256 KB | 512 KB | 512 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Max CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| 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 |
| CAN | CAN 2.0B | CAN 2.0B | CAN 2.0B | No CAN | CAN 2.0B |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Integrated CAN 2.0B with DeviceNet addressing (vsPIC32MX450F256H-50I/MR)
- 50 MHz vs 40 MHz sibling (vsPIC32MX550F256H-I/MR)
- 256 KB Flash with USB OTG and PMP dual buffers (vsPIC32MX270F256H-50I/MR)
Ghi chú thiết kế
Estimated: at 50 MHz CPU and 3.3V supply, the core draw is approximately 30 mA (1.6 mA/MHz per Microchip family datasheet). Place one 10uF X7R ceramic bulk capacitor at the regulator output and 0.1uF decoupling within 5 mm of every VDD/VSS pair. For USB applications, also decouple the VBUS line with a 10uF tantalum and protect VBUS with a TVS diode.
The 64-pin QFN (9x9) has a center EP pad that must be soldered to a continuous ground copper pour on the PCB to meet thermal and electrical performance. Without the EP pad soldered, the die temperature can rise 15-20C above ambient at full CPU load. For 4-layer PCBs, use 2 oz copper on top and bottom layers under the device, with stitched vias through the inner ground plane.
Route the 8 MHz primary oscillator traces (OSC1/OSC2) symmetrically with respect to ground, keeping them shorter than 10 mm and away from USB and switching power traces. The optional 32.768 kHz secondary oscillator should use a guard ring tied to analog ground. Both crystal traces must be referenced to a continuous ground plane on the adjacent layer with no signal traces crossing.
Do not confuse the '-50I/MR' suffix: the '-50' denotes 50 MHz, 'I' denotes industrial -40C to +85C temperature, and 'MR' denotes the 64-pin QFN (9x9) package. A common mistake is to specify the 40 MHz '-I/MR' variant when 50 MHz performance is required. Also, when migrating to the PIC32MX570F512H-50I/MR, update the linker script to reflect the new memory map - the larger Flash starts at the same base address but extends higher.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose AEC-Q100 variants for automotive applications.
