PIC32MX250F256L-I/PF - 32-bit MCU 256KB Flash 50MHz 100-TQFP | Microchip
MPN: PIC32MX250F256L-I/PF ✓ Hoạt độngPIC32MX250F256L-I/PF Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX250F256L-I/PF — 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 PIC32MX250F256L-I/PF (cùng hình factor và footprint) — khác nhau ở ADC, Package, USB, Core Architecture, Parallel Master Port (PMP).
PIC32MX250F256L-50I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F256L-I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX170F512L-I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX150F256L-I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX250F256L-V/PF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX270F256L-I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX250F256L-I/PF Tỷ lệ tối đa & tính chất điện
| Core | MIPS32 M4K 32-bit RISC |
| Tần số xung maksimum | 50 MHz (83 DMIPS) |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 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 |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX250F256L-I/PF
| Chân 1 | RG15 — General purpose I/O (Port G bit 15) |
| Chân 2 | VDD — Core logic supply voltage (2.3V-3.6V) |
| Chân 3 | VDD — Core logic supply voltage (2.3V-3.6V) |
| Chân 4 | VSS — Ground reference |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RD0 — General purpose I/O (Port D bit 0) |
| Chân 7 | RD1 — General purpose I/O (Port D bit 1) |
| Chân 8 | RD2 — General purpose I/O (Port D bit 2) |
| Chân 9 | RD3 — General purpose I/O (Port D bit 3) |
| Chân 10 | RD4 — General purpose I/O (Port D bit 4) |
| Chân 11 | RD5 — General purpose I/O (Port D bit 5) |
| Chân 12 | RD6 — General purpose I/O (Port D bit 6) |
| Chân 13 | RD7 — General purpose I/O (Port D bit 7) |
| Chân 14 | RC1 — General purpose I/O (Port C bit 1) |
| Chân 15 | RC2 — General purpose I/O (Port C bit 2) |
| Chân 16 | RC3 — General purpose I/O (Port C bit 3) |
| Chân 17 | RC4 — General purpose I/O (Port C bit 4) |
| Chân 18 | AVDD — Analog supply voltage |
| Chân 19 | AVSS — Analog ground reference |
| Chân 20 | VREF+ — ADC positive voltage reference |
| Chân 21 | VREF- — ADC negative voltage reference |
| Chân 22 | AN0 — Analog input channel 0 |
| Chân 23 | AN1 — Analog input channel 1 |
| Chân 24 | AN2 — Analog input channel 2 |
| Chân 25 | AN3 — Analog input channel 3 |
| Chân 26 | AN4 — Analog input channel 4 |
| Chân 27 | AN5 — Analog input channel 5 |
| Chân 28 | AN6 — Analog input channel 6 |
| Chân 29 | AN7 — Analog input channel 7 |
| Chân 30 | AVDD — Analog supply voltage |
| Chân 31 | AVSS — Analog ground reference |
| Chân 32 | AN8 — Analog input channel 8 |
| Chân 33 | AN9 — Analog input channel 9 |
| Chân 34 | AN10 — Analog input channel 10 |
| Chân 35 | AN11 — Analog input channel 11 |
| Chân 36 | AN12 — Analog input channel 12 |
| Chân 37 | AN13 — Analog input channel 13 |
| Chân 38 | AN14 — Analog input channel 14 |
| Chân 39 | AN15 — Analog input channel 15 |
| Chân 40 | VDD — Core logic supply voltage (2.3V-3.6V) |
| Chân 41 | VSS — Ground reference |
| Chân 42 | OSC1 — Primary oscillator input |
| Chân 43 | OSC2 — Primary oscillator output |
| Chân 44 | SOSCO — Secondary oscillator (32 kHz) output |
| Chân 45 | SOSCI — Secondary oscillator (32 kHz) input |
| Chân 46 | RB0 — General purpose I/O (Port B bit 0) |
| Chân 47 | RB1 — General purpose I/O (Port B bit 1) |
| Chân 48 | RB2 — General purpose I/O (Port B bit 2) |
| Chân 49 | RB3 — General purpose I/O (Port B bit 3) |
| Chân 50 | RB4 — General purpose I/O (Port B bit 4) |
| Chân 51 | RB5 — General purpose I/O (Port B bit 5) |
| Chân 52 | RB6 — General purpose I/O (Port B bit 6, ICDCLK) |
| Chân 53 | RB7 — General purpose I/O (Port B bit 7, ICDDATA) |
| Chân 54 | RB8 — General purpose I/O (Port B bit 8) |
| Chân 55 | RB9 — General purpose I/O (Port B bit 9) |
| Chân 56 | RB10 — General purpose I/O (Port B bit 10) |
| Chân 57 | RB11 — General purpose I/O (Port B bit 11) |
| Chân 58 | RB12 — General purpose I/O (Port B bit 12) |
| Chân 59 | RB13 — General purpose I/O (Port B bit 13) |
| Chân 60 | RB14 — General purpose I/O (Port B bit 14) |
| Chân 61 | RB15 — General purpose I/O (Port B bit 15) |
| Chân 62 | VDD — Core logic supply voltage (2.3V-3.6V) |
| Chân 63 | VSS — Ground reference |
| Chân 64 | RC12 — General purpose I/O (Port C bit 12) |
| Chân 65 | RC13 — General purpose I/O (Port C bit 13) |
| Chân 66 | RC14 — General purpose I/O (Port C bit 14) |
| Chân 67 | RC15 — General purpose I/O (Port C bit 15) |
| Chân 68 | RD8 — General purpose I/O (Port D bit 8) |
| Chân 69 | RD9 — General purpose I/O (Port D bit 9) |
| Chân 70 | RD10 — General purpose I/O (Port D bit 10) |
| Chân 71 | RD11 — General purpose I/O (Port D bit 11) |
| Chân 72 | RD12 — General purpose I/O (Port D bit 12) |
| Chân 73 | RD13 — General purpose I/O (Port D bit 13) |
| Chân 74 | RD14 — General purpose I/O (Port D bit 14) |
| Chân 75 | RD15 — General purpose I/O (Port D bit 15) |
| Chân 76 | VUSB3V3 — USB transceiver 3.3V supply |
| Chân 77 | VSS — Ground reference |
| Chân 78 | D+ — USB D+ data line |
| Chân 79 | D- — USB D- data line |
| Chân 80 | VBUS — USB VBUS sensing pin |
| Chân 81 | VSS — Ground reference |
| Chân 82 | RG6 — General purpose I/O (Port G bit 6) |
| Chân 83 | RG7 — General purpose I/O (Port G bit 7) |
| Chân 84 | RG8 — General purpose I/O (Port G bit 8) |
| Chân 85 | RG9 — General purpose I/O (Port G bit 9) |
| Chân 86 | MCLR — Master Clear (active-low reset input) |
| Chân 87 | RE0 — General purpose I/O (Port E bit 0) |
| Chân 88 | RE1 — General purpose I/O (Port E bit 1) |
| Chân 89 | RE2 — General purpose I/O (Port E bit 2) |
| Chân 90 | RE3 — General purpose I/O (Port E bit 3) |
| Chân 91 | RE4 — General purpose I/O (Port E bit 4) |
| Chân 92 | RE5 — General purpose I/O (Port E bit 5) |
| Chân 93 | RE6 — General purpose I/O (Port E bit 6) |
| Chân 94 | RE7 — General purpose I/O (Port E bit 7) |
| Chân 95 | RF0 — General purpose I/O (Port F bit 0) |
| Chân 96 | RF1 — General purpose I/O (Port F bit 1) |
| Chân 97 | RF2 — General purpose I/O (Port F bit 2) |
| Chân 98 | RF3 — General purpose I/O (Port F bit 3) |
| Chân 99 | RF4 — General purpose I/O (Port F bit 4) |
| Chân 100 | RF5 — General purpose I/O (Port F bit 5) |
Ứng dụng tiêu biểu
PIC32MX250F256L-I/PF phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX250F256L-I/PF — 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 | 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) |
Bảo phân biệt quan trọng
- On-chip USB 2.0 Full-Speed OTG controller with no external PHY required (vsPIC32MX150F256L-I/PF)
- Parallel Master Port (PMP) with dual read/write buffers for direct LCD driving (vsPIC32MX170F512L-I/PF)
- Integrated CTMU for capacitive touch sensing without dedicated touch IC (vsSTM32F103C8T6)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
