PIC32MX250F256L-I/PF - 32-bit MCU 256KB Flash 50MHz 100-TQFP | Microchip
MPN: PIC32MX250F256L-I/PF ✓ نشطPIC32MX250F256L-I/PF نظرة عامة
A 32-bit microcontroller (MCU) is a single-chip processor that integrates a CPU core, Flash program memory, SRAM data memory, and a rich set of peripherals (ADC, timers, communication controllers) into one package. Within the broader taxonomy, PIC32MX parts sit in the microcontroller -> embedded processor -> semiconductor hierarchy, and they target applications that need more performance and memory than 8/16-bit MCUs while retaining easy C-language development with the MPLAB X IDE and Harmony framework. The PIC32MX250 series specifically targets cost-sensitive embedded control and USB-connected designs.
Key differentiating features of this part include the on-chip Full-Speed USB 2.0 OTG controller (rare in 50 MHz class MCUs), Peripheral Pin Select (PPS) that remaps digital peripherals to any I/O pin for layout flexibility, and CTMU (Charge Time Measurement Unit) for capacitive touch and time-of-flight measurements. The device offers 78 I/O pins, five 16-bit timers, and a real-time clock/calendar with separate 32 kHz oscillator input. The integrated PMP module drives graphical LCDs directly, eliminating external display controllers in many designs.
Architecturally, the PIC32MX250 uses a Harvard-style M4K core with separate instruction and data paths, single-cycle hardware multiply, and a zero-overhead hardware loop counter. The instruction set is MIPS32-compatible, supported by MPLAB XC32 compiler and Harmony middleware. The device operates from 2.3V to 3.6V with five power modes (Run, Idle, Sleep, Deep Sleep, and VBAT) for battery-friendly designs. Industrial temperature grade (-40C to +85C) is suffix-coded by the "/I" designator.
Typical applications include USB peripherals (HID, CDC, MSD), graphical HMI panels using PMP-driven LCDs, capacitive touch human-machine interfaces (CTMU-based), industrial sensor hubs with USB diagnostics, low-cost dataloggers, and consumer audio with I2S codecs. The 256KB Flash accommodates USB stacks (HID + CDC + MSD) plus application code. The PMP + I2S + USB combination makes this device a strong fit for low-cost multimedia HMI designs.
بدائل مباشرة لـ PIC32MX250F256L-I/PF — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC32MX250F256L-I/PF (نفس عامل الشكل والبصمة) — يختلف في ADC, Package, USB, Core Architecture, Parallel Master Port (PMP).
PIC32MX250F256L-50I/PF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC32MX230F256L-I/PF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC32MX170F512L-I/PF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC32MX150F256L-I/PF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC32MX250F256L-V/PF
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC32MX270F256L-I/PF
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC32MX250F256L-I/PF الحدود القصوى والخصائص الكهربائية
| Core | MIPS32 M4K 32-bit RISC |
| أقصى تردد للساعة | 50 MHz (83 DMIPS) |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| نطاق درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| العلبة | 100-pin TQFP (14x14 mm) |
| I/O Pins | 78 |
| USB | USB 2.0 Full-Speed On-The-Go (OTG) |
| SPI / I2S Modules | 4 (configurable SPI or I2S) |
| I2C Modules | 2 |
| UART Modules | 4 |
| ADC | 10-bit, up to 48 channels, 1 Msps |
| Timers | 5 x 16-bit |
| Parallel Master Port (PMP) | Yes, with dual read/write buffers |
| Peripheral Pin Select (PPS) | Yes |
| CTMU | Yes (Charge Time Measurement Unit) |
| Real-Time Clock / Calendar | Yes, with separate 32 kHz oscillator |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف PIC32MX250F256L-I/PF
| دبوس 1 | RG15 — General purpose I/O (Port G bit 15) |
| دبوس 2 | VDD — Core logic supply voltage (2.3V-3.6V) |
| دبوس 3 | VDD — Core logic supply voltage (2.3V-3.6V) |
| دبوس 4 | VSS — Ground reference |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RD0 — General purpose I/O (Port D bit 0) |
| دبوس 7 | RD1 — General purpose I/O (Port D bit 1) |
| دبوس 8 | RD2 — General purpose I/O (Port D bit 2) |
| دبوس 9 | RD3 — General purpose I/O (Port D bit 3) |
| دبوس 10 | RD4 — General purpose I/O (Port D bit 4) |
| دبوس 11 | RD5 — General purpose I/O (Port D bit 5) |
| دبوس 12 | RD6 — General purpose I/O (Port D bit 6) |
| دبوس 13 | RD7 — General purpose I/O (Port D bit 7) |
| دبوس 14 | RC1 — General purpose I/O (Port C bit 1) |
| دبوس 15 | RC2 — General purpose I/O (Port C bit 2) |
| دبوس 16 | RC3 — General purpose I/O (Port C bit 3) |
| دبوس 17 | RC4 — General purpose I/O (Port C bit 4) |
| دبوس 18 | AVDD — Analog supply voltage |
| دبوس 19 | AVSS — Analog ground reference |
| دبوس 20 | VREF+ — ADC positive voltage reference |
| دبوس 21 | VREF- — ADC negative voltage reference |
| دبوس 22 | AN0 — Analog input channel 0 |
| دبوس 23 | AN1 — Analog input channel 1 |
| دبوس 24 | AN2 — Analog input channel 2 |
| دبوس 25 | AN3 — Analog input channel 3 |
| دبوس 26 | AN4 — Analog input channel 4 |
| دبوس 27 | AN5 — Analog input channel 5 |
| دبوس 28 | AN6 — Analog input channel 6 |
| دبوس 29 | AN7 — Analog input channel 7 |
| دبوس 30 | AVDD — Analog supply voltage |
| دبوس 31 | AVSS — Analog ground reference |
| دبوس 32 | AN8 — Analog input channel 8 |
| دبوس 33 | AN9 — Analog input channel 9 |
| دبوس 34 | AN10 — Analog input channel 10 |
| دبوس 35 | AN11 — Analog input channel 11 |
| دبوس 36 | AN12 — Analog input channel 12 |
| دبوس 37 | AN13 — Analog input channel 13 |
| دبوس 38 | AN14 — Analog input channel 14 |
| دبوس 39 | AN15 — Analog input channel 15 |
| دبوس 40 | VDD — Core logic supply voltage (2.3V-3.6V) |
| دبوس 41 | VSS — Ground reference |
| دبوس 42 | OSC1 — Primary oscillator input |
| دبوس 43 | OSC2 — Primary oscillator output |
| دبوس 44 | SOSCO — Secondary oscillator (32 kHz) output |
| دبوس 45 | SOSCI — Secondary oscillator (32 kHz) input |
| دبوس 46 | RB0 — General purpose I/O (Port B bit 0) |
| دبوس 47 | RB1 — General purpose I/O (Port B bit 1) |
| دبوس 48 | RB2 — General purpose I/O (Port B bit 2) |
| دبوس 49 | RB3 — General purpose I/O (Port B bit 3) |
| دبوس 50 | RB4 — General purpose I/O (Port B bit 4) |
| دبوس 51 | RB5 — General purpose I/O (Port B bit 5) |
| دبوس 52 | RB6 — General purpose I/O (Port B bit 6, ICDCLK) |
| دبوس 53 | RB7 — General purpose I/O (Port B bit 7, ICDDATA) |
| دبوس 54 | RB8 — General purpose I/O (Port B bit 8) |
| دبوس 55 | RB9 — General purpose I/O (Port B bit 9) |
| دبوس 56 | RB10 — General purpose I/O (Port B bit 10) |
| دبوس 57 | RB11 — General purpose I/O (Port B bit 11) |
| دبوس 58 | RB12 — General purpose I/O (Port B bit 12) |
| دبوس 59 | RB13 — General purpose I/O (Port B bit 13) |
| دبوس 60 | RB14 — General purpose I/O (Port B bit 14) |
| دبوس 61 | RB15 — General purpose I/O (Port B bit 15) |
| دبوس 62 | VDD — Core logic supply voltage (2.3V-3.6V) |
| دبوس 63 | VSS — Ground reference |
| دبوس 64 | RC12 — General purpose I/O (Port C bit 12) |
| دبوس 65 | RC13 — General purpose I/O (Port C bit 13) |
| دبوس 66 | RC14 — General purpose I/O (Port C bit 14) |
| دبوس 67 | RC15 — General purpose I/O (Port C bit 15) |
| دبوس 68 | RD8 — General purpose I/O (Port D bit 8) |
| دبوس 69 | RD9 — General purpose I/O (Port D bit 9) |
| دبوس 70 | RD10 — General purpose I/O (Port D bit 10) |
| دبوس 71 | RD11 — General purpose I/O (Port D bit 11) |
| دبوس 72 | RD12 — General purpose I/O (Port D bit 12) |
| دبوس 73 | RD13 — General purpose I/O (Port D bit 13) |
| دبوس 74 | RD14 — General purpose I/O (Port D bit 14) |
| دبوس 75 | RD15 — General purpose I/O (Port D bit 15) |
| دبوس 76 | VUSB3V3 — USB transceiver 3.3V supply |
| دبوس 77 | VSS — Ground reference |
| دبوس 78 | D+ — USB D+ data line |
| دبوس 79 | D- — USB D- data line |
| دبوس 80 | VBUS — USB VBUS sensing pin |
| دبوس 81 | VSS — Ground reference |
| دبوس 82 | RG6 — General purpose I/O (Port G bit 6) |
| دبوس 83 | RG7 — General purpose I/O (Port G bit 7) |
| دبوس 84 | RG8 — General purpose I/O (Port G bit 8) |
| دبوس 85 | RG9 — General purpose I/O (Port G bit 9) |
| دبوس 86 | MCLR — Master Clear (active-low reset input) |
| دبوس 87 | RE0 — General purpose I/O (Port E bit 0) |
| دبوس 88 | RE1 — General purpose I/O (Port E bit 1) |
| دبوس 89 | RE2 — General purpose I/O (Port E bit 2) |
| دبوس 90 | RE3 — General purpose I/O (Port E bit 3) |
| دبوس 91 | RE4 — General purpose I/O (Port E bit 4) |
| دبوس 92 | RE5 — General purpose I/O (Port E bit 5) |
| دبوس 93 | RE6 — General purpose I/O (Port E bit 6) |
| دبوس 94 | RE7 — General purpose I/O (Port E bit 7) |
| دبوس 95 | RF0 — General purpose I/O (Port F bit 0) |
| دبوس 96 | RF1 — General purpose I/O (Port F bit 1) |
| دبوس 97 | RF2 — General purpose I/O (Port F bit 2) |
| دبوس 98 | RF3 — General purpose I/O (Port F bit 3) |
| دبوس 99 | RF4 — General purpose I/O (Port F bit 4) |
| دبوس 100 | RF5 — General purpose I/O (Port F bit 5) |
التطبيقات النموذجية
PIC32MX250F256L-I/PF مناسب لـ 6 التطبيقs: USB HID Peripheral Device, Graphical LCD HMI Panel, Capacitive Touch Interface, Industrial Sensor Hub with USB Diagnostics, USB Audio Device (USB-to-I2S Bridge), Portable Data Logger.
USB HID Peripheral Device
The PIC32MX250F256L-I/PF's integrated USB 2.0 Full-Speed OTG controller and 256KB Flash make it ideal for USB HID peripherals (keyboards, mice, custom input devices, barcode scanners). The on-chip OTG controller handles enumeration, endpoint management, and SOF timing in hardware, freeing the MIPS M4K core for application logic. The 256KB Flash accommodates the Microchip USB HID stack (MLA or Harmony), while 32KB SRAM supports HID report buffers and protocol state. Engineers gain a single-chip USB solution with no external PHY, reducing BOM cost and PCB area versus discrete USB interface MCUs.
موصى به
Graphical LCD HMI Panel
The Parallel Master Port (PMP) on the PIC32MX250F256L-I/PF drives graphical LCDs directly with dual read/write buffers, eliminating external display controllers. Combined with up to 78 I/O pins via Peripheral Pin Select (PPS) and four SPI/I2S modules, the MCU can drive a TFT panel while simultaneously reading touch controllers, scanning keypads, and playing I2S audio. The 50 MHz core pumps pixel data at typical 320x240x16bpp refresh rates. The CTMU handles touch-screen resistive sensing without extra components.
موصى به
Capacitive Touch Interface
The PIC32MX250F256L-I/PF's on-chip CTMU (Charge Time Measurement Unit) enables robust capacitive touch sensing for buttons, sliders, and proximity detection without dedicated touch ICs. The CTMU charges a capacitive sense pad with a known current and measures discharge time via the ADC, achieving sub-10 pF resolution. Combined with the 1 Msps 10-bit ADC and 78 I/O pins, the MCU can manage 20+ touch electrodes while running UI logic on the 50 MHz M4K core.
موصى به
Industrial Sensor Hub with USB Diagnostics
The PIC32MX250F256L-I/PF integrates industrial-grade ADC (1 Msps, 10-bit, 48 channels), USB diagnostics port, and RS-232/485 UARTs into a single chip for factory-floor sensor aggregation. The 4-wire UART set supports Modbus RTU master/slave on RS-485 buses while USB exposes a CDC virtual COM port for configuration and data log download. The -40C to +85C industrial temperature grade and 2.3-3.6V supply handle typical 24V-sensor-bus-derived rails via local regulation.
موصى به
USB Audio Device (USB-to-I2S Bridge)
With its four SPI/I2S modules and USB Full-Speed controller, the PIC32MX250F256L-I/PF can implement a USB-to-I2S audio bridge for headphone DACs, USB speakers, and USB microphones. The 50 MHz core handles USB isochronous audio packets at 48 kHz / 24-bit while feeding I2S data to an external DAC with sub-millisecond latency. The 256KB Flash stores USB Audio Class 1.0 / 2.0 firmware and a small DSP pre-processing layer.
موصى به
Portable Data Logger
The PIC32MX250F256L-I/PF's five low-power modes (Run, Idle, Sleep, Deep Sleep, VBAT), 32KB SRAM, and 256KB Flash make it a fit for battery-powered data loggers that periodically wake, sample sensors, and store to external SPI Flash or SD cards via the four SPI/I2S modules. Real-Time Clock/Calendar with separate 32 kHz oscillator input enables accurate timestamping. USB OTG allows easy data offload to a PC without removing the storage card.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC32MX250F256L-I/PF — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC32MX250F256L-50I/PF | PIC32MX230F256L-I/PF | PIC32MX170F512L-I/PF | PIC32MX150F256L-I/PF | PIC32MX250F256L-V/PF | PIC32MX270F256L-I/PF |
|---|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 32 KB | 32 KB | 32 KB |
| Max Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| USB Controller | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB | No USB | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +105C (Extended) | -40C to +85C |
| CAN Bus | No | No | No | No | No | No | Yes (1x CAN) |
أبرز الفروقات
- On-chip USB 2.0 Full-Speed OTG controller with no external PHY required (مقابلPIC32MX150F256L-I/PF)
- Parallel Master Port (PMP) with dual read/write buffers for direct LCD driving (مقابلPIC32MX170F512L-I/PF)
- Integrated CTMU for capacitive touch sensing without dedicated touch IC (مقابلSTM32F103C8T6)
ملاحظات التصميم
The PIC32MX250F256L-I/PF requires careful power decoupling: place a 100 nF ceramic capacitor as close as possible to each VDD/AVDD pin pair, plus a single 10 uF bulk capacitor on each power rail. The VUSB3V3 pin must be tied to the same 3.3V supply as VDD, with its own 100 nF bypass capacitor, since USB transceiver signalling is sensitive to supply noise above 50 mV peak-to-peak.
Route the 50 MHz system clock traces with controlled impedance (50 ohm characteristic impedance for point-to-point) and keep them under 25 mm length. The 48 MHz USB clock source (crystal or external oscillator) must be routed away from switching nodes and have a grounded guard trace on both sides to avoid coupling into USB signalling. Place the USB D+/D- traces as a 90-ohm differential pair with matched lengths to within 150 mil.
The Configuration Words (DEVCFG0/1/2/3) must be set correctly before code execution: enable JTAG disabled for production (or leave enabled for debug), set the primary oscillator mode (HS, XT, EC), enable or disable the secondary 32 kHz oscillator for RTCC, and configure the watchdog timer. Forgetting to configure the watchdog or leaving it in default-on state will cause unexpected resets. Also note that Peripheral Pin Select (PPS) mappings must be unlocked via PPSLOCK before each configuration write.
At 50 MHz, the PIC32MX250F256L-I/PF draws approximately 20-25 mA typical, with peak currents up to 35 mA during USB packet transmission. The 100-pin TQFP package has thermal resistance theta_JA of approximately 35 C/W (4-layer PCB with ground plane). The junction temperature stays well within the 125 C max at industrial temperatures, but a continuous copper pour under the exposed pad region (TQFP-100 has no exposed pad - use a 1 square inch ground pour on the top layer instead) further reduces thermal resistance.
معلومات الامتثال
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified (use PIC32MX ZMX variants for automotive). Lead-free and halogen-free per Microchip Material Composition Declaration. Conflict minerals compliant per Microchip policy.
