PIC32MX250F256LT-50I/PT - 50MHz 32-bit MCU, 256KB Flash | Microchip
MPN： PIC32MX250F256LT-50I/PT ✓ 啟用中PIC32MX250F256LT-50I/PT 概覽
A 32-bit microcontroller (MCU) is a single-chip processor that combines a high-performance data path (32-bit registers, ALU and bus) with on-chip Flash program memory, SRAM data memory, and a rich set of peripherals. Microcontrollers sit at the top of the embedded compute hierarchy: microcontroller -> embedded MCU -> embedded processor -> semiconductor. PIC32MX devices from Microchip extend the PIC architecture into 32-bit territory using the MIPS M4K core, offering significantly more compute headroom than 8-bit PIC16/PIC18 devices while keeping the familiar MPLAB X IDE and Harmony toolchain.
Key features of the PIC32MX250F256LT-50I/PT include: 50 MHz core with 1.56 DMIPS/MHz (approximately 78 DMIPS), 256 KB self-programmable Flash with live update support, 32 KB SRAM, USB 2.0 full-speed OTG device/host/on-the-go, I2S for digital audio, two I2C, two UART, two SPI, a Parallel Master Port (PMP) for graphics or external memory, a 10-bit 1 Msps ADC, three analog comparators, five 16-bit timers/counters, a Real-Time Clock and Calendar (RTCC), CTMU for touch sensing, and JTAG/ICSP/debug.
The architecture combines a 5-stage MIPS M4K pipeline with a multi-vectored interrupt controller, an 8-channel DMA, and a peripheral bus that lets the CPU offload I/O. The 1.8V core is fed by an internal LDO from the 2.3-3.6V supply, and the part supports industrial-grade -40C to +85C operation. Code-compatible scaling across the PIC32MX1/2/3/4/5/6/7 families lets developers move from 64-pin to 100-pin packages or from 128 KB to 512 KB Flash without rewriting firmware.
Typical applications include USB peripherals (HID, CDC, MSD, audio), capacitive touch human-machine interfaces, low-cost graphical displays driven by the PMP, sensor hubs with CTMU time-of-flight, industrial control front-ends, and battery-powered IoT endpoints with USB charging. The integrated USB transceiver eliminates external PHY cost on full-speed links.
When designing with this part, allocate 16 KB of Flash for the Harmony bootloader if USB firmware update is required, and place a 0.1 uF decoupling capacitor on every VDD/AVDD pair plus a single 10 uF bulk cap near the VCAP pin. Always use the latest MPLAB XC32 compiler and the device-specific PIC32MX250F256L header for correct SFR definitions.
This page synthesizes distributor pricing, drop-in PIC32MX2xx alternatives, and application guidance not collected in the Microchip datasheet alone.
直接替換替代品，適用於 PIC32MX250F256LT-50I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX250F256LT-50I/PT （相同外形與佔位） — 差異在於 Package, ADC, Parallel Master Port (PMP), USB, SRAM.
PIC32MX250F256L-50I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX250F256HT-50I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX250F256H-50I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX230F256DT-50I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX170F512LT-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX150F256LT-50I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX250F256LT-50I/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| Program Flash Memory | 256 KB |
| SRAM | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| USB | USB 2.0 Full-Speed OTG (Device/Host/OTG) |
| ADC | 10-bit, up to 1 Msps |
| Analog Comparators | 3 |
| Timers | 5 x 16-bit |
| UART | 2 |
| SPI | 2 |
| I2C | 2 |
| I2S | 1 |
| Parallel Master Port (PMP) | Yes |
| CTMU (Charge Time Measurement Unit) | Yes |
| RTCC (Real-Time Clock and Calendar) | Yes |
| 封裝 | 100-pin TQFP (PT), 12x12 mm |
| 工作溫度範圍 | -40C to +85C (Industrial) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
PIC32MX250F256LT-50I/PT 腳位配置
| 腳位 1 | RP15/RD8 — Remappable I/O / RD8 |
| 腳位 2 | SDA2/RG3 — I2C2 data (remappable) |
| 腳位 3 | SCL2/RG2 — I2C2 clock (remappable) |
| 腳位 4 | RP14/RD11 — Remappable I/O / RD11 |
| 腳位 5 | RP13/RD10 — Remappable I/O / RD10 |
| 腳位 6 | RP12/RD9 — Remappable I/O / RD9 |
| 腳位 7 | RP11/RE5 — Remappable I/O / RE5 |
| 腳位 8 | RP10/RE4 — Remappable I/O / RE4 |
| 腳位 9 | RP9/RE3 — Remappable I/O / RE3 |
| 腳位 10 | RP8/RE2 — Remappable I/O / RE2 |
| 腳位 11 | RP7/RE1 — Remappable I/O / RE1 |
| 腳位 12 | RP6/RE0 — Remappable I/O / RE0 |
| 腳位 13 | VDD — Digital supply 2.3-3.6 V |
| 腳位 14 | VCAP — Core LDO bypass; 10 uF capacitor to VSS |
| 腳位 15 | VSS — Digital ground |
| 腳位 16 | RF13/PMD5 — Remappable I/O / PMP data 5 |
| 腳位 17 | RF12/PMD4 — Remappable I/O / PMP data 4 |
| 腳位 18 | PMD3 — PMP data 3 |
| 腳位 19 | PMD2 — PMP data 2 |
| 腳位 20 | PMD1 — PMP data 1 |
| 腳位 21 | PMD0 — PMP data 0 |
| 腳位 22 | PMA23 — PMP address 23 |
| 腳位 23 | PMA22 — PMP address 22 |
| 腳位 24 | PMA21 — PMP address 21 |
| 腳位 25 | PMA20 — PMP address 20 |
| 腳位 26 | PMRD — PMP read strobe |
| 腳位 27 | PMWR — PMP write strobe |
| 腳位 28 | PMA19 — PMP address 19 |
| 腳位 29 | PMA18 — PMP address 18 |
| 腳位 30 | PMA17 — PMP address 17 |
| 腳位 31 | PMA16 — PMP address 16 |
| 腳位 32 | PMA15 — PMP address 15 |
| 腳位 33 | PMA14 — PMP address 14 |
| 腳位 34 | PMA13 — PMP address 13 |
| 腳位 35 | PMA12 — PMP address 12 |
| 腳位 36 | PMA11 — PMP address 11 |
| 腳位 37 | PMA10 — PMP address 10 |
| 腳位 38 | PMA9 — PMP address 9 |
| 腳位 39 | PMA8 — PMP address 8 |
| 腳位 40 | PMA7 — PMP address 7 |
| 腳位 41 | PMA6 — PMP address 6 |
| 腳位 42 | PMA5 — PMP address 5 |
| 腳位 43 | PMA4 — PMP address 4 |
| 腳位 44 | PMA3 — PMP address 3 |
| 腳位 45 | PMA2 — PMP address 2 |
| 腳位 46 | PMA1 — PMP address 1 |
| 腳位 47 | PMA0 — PMP address 0 |
| 腳位 48 | PMCS1 — PMP chip select 1 |
| 腳位 49 | PMCS2 — PMP chip select 2 |
| 腳位 50 | PMALL — PMP address latch low |
| 腳位 51 | PMALH — PMP address latch high |
| 腳位 52 | AVSS — Analog ground |
| 腳位 53 | AVDD — Analog supply 2.3-3.6 V |
| 腳位 54 | AN12/C1INC/RB12 — ADC input / comparator input |
| 腳位 55 | AN11/C1IND/RB11 — ADC input / comparator input |
| 腳位 56 | AN10/C2INC/RB10 — ADC input / comparator input |
| 腳位 57 | AN9/C3INC/RB9 — ADC input / comparator input |
| 腳位 58 | AN8/RB8 — ADC input 8 |
| 腳位 59 | AN7/RB7 — ADC input 7 |
| 腳位 60 | AN6/OCFA/RB6 — ADC input 6 / OC fault A |
| 腳位 61 | AN5/RB5 — ADC input 5 |
| 腳位 62 | AN4/RB4 — ADC input 4 |
| 腳位 63 | AN3/RB3 — ADC input 3 |
| 腳位 64 | AN2/SS2/RB2 — ADC input 2 / SPI2 slave select |
| 腳位 65 | AN1/RB1 — ADC input 1 |
| 腳位 66 | AN0/RB0 — ADC input 0 |
| 腳位 67 | VREF-/CVREF- — ADC reference low / comparator reference |
| 腳位 68 | VREF+/CVREF+ — ADC reference high / comparator reference |
| 腳位 69 | AVDD — Analog supply 2.3-3.6 V |
| 腳位 70 | AVSS — Analog ground |
| 腳位 71 | D+/RG1 — USB D+ data line |
| 腳位 72 | D-/RG0 — USB D- data line |
| 腳位 73 | VBUS/RG2 — USB VBUS sense |
| 腳位 74 | VDD — Digital supply 2.3-3.6 V |
| 腳位 75 | VSS — Digital ground |
| 腳位 76 | OSC1/RC12 — Crystal oscillator input |
| 腳位 77 | OSC2/RC15 — Crystal oscillator output |
| 腳位 78 | SOSCO/RC13 — Secondary oscillator output (32 kHz) |
| 腳位 79 | SOSCI/RC14 — Secondary oscillator input (32 kHz) |
| 腳位 80 | CLKI/RC2 — External clock input |
| 腳位 81 | RF1 — Remappable I/O F1 |
| 腳位 82 | RF0 — Remappable I/O F0 |
| 腳位 83 | RD1 — Remappable I/O D1 |
| 腳位 84 | RD2 — Remappable I/O D2 |
| 腳位 85 | RD3 — Remappable I/O D3 |
| 腳位 86 | RD4 — Remappable I/O D4 |
| 腳位 87 | RD5 — Remappable I/O D5 |
| 腳位 88 | RD6 — Remappable I/O D6 |
| 腳位 89 | RD7 — Remappable I/O D7 |
| 腳位 90 | MCLR — Master clear reset, active low |
| 腳位 91 | RP0/RD0 — Remappable I/O / RD0 |
| 腳位 92 | RP1/RF5 — Remappable I/O / RF5 |
| 腳位 93 | RP2/RF6 — Remappable I/O / RF6 |
| 腳位 94 | RP3/RF7 — Remappable I/O / RF7 |
| 腳位 95 | RP4/RF8 — Remappable I/O / RF8 |
| 腳位 96 | RP5/RF3 — Remappable I/O / RF3 |
| 腳位 97 | TMS/RA0 — JTAG mode select |
| 腳位 98 | TCK/RA1 — JTAG clock |
| 腳位 99 | TDI/RA2 — JTAG data in |
| 腳位 100 | TDO/RA3 — JTAG data out |
典型應用
PIC32MX250F256LT-50I/PT 適用於 7 應用s: USB HID/CDC Peripherals, Capacitive Touch HMI Front-End, Low-Cost Graphics Display Controller, Digital Audio Bridge (USB to I2S), Industrial Sensor Hub, Battery-Powered IoT Edge Node, USB Firmware Bootloader Host.
USB HID/CDC Peripherals
The PIC32MX250F256LT-50I/PT's integrated USB 2.0 full-speed OTG transceiver and 32 KB SRAM make it ideal for USB Human Interface Devices, Communication Device Class bridges, and Mass Storage endpoints. The on-chip PHY eliminates external ULPI cost, while the 50 MHz MIPS M4K core runs composite USB stacks with sub-millisecond interrupt latency. Designers typically implement a USB bootloader in the first 16 KB of Flash for field-updateable firmware, leaving the remainder for application code. Harmony 3 USB middleware provides ready-to-use CDC and HID class drivers.
推薦
Capacitive Touch HMI Front-End
The CTMU (Charge Time Measurement Unit) on the PIC32MX250F256LT-50I/PT enables robust capacitive touch sensing for keypads, sliders, and proximity sensors. Combined with the 10-bit 1 Msps ADC and 32 KB SRAM, designers can run Microchip's mTouch sensing libraries to detect touches through 5 mm glass with minimal BOM. The 50 MHz core scans up to 32 channels in under 2 ms, and the RTCC keeps accurate timestamps for sleep-mode wake events. Industrial -40C to +85C operation supports outdoor appliance panels.
推薦
Low-Cost Graphics Display Controller
The Parallel Master Port (PMP) on the PIC32MX250F256LT-50I/PT drives QVGA TFT displays up to 320x240 without an external graphics controller, dramatically cutting BOM cost in IoT appliances and industrial HMIs. The 256 KB Flash stores frame buffers and font tables, while the 32 KB SRAM holds a partial frame buffer for partial updates. The 50 MHz core refreshes a QVGA screen at 30 fps with 8-bit color depth. Designers pair the MCU with inexpensive SPI TFTs for cost-sensitive products.
推薦
Digital Audio Bridge (USB to I2S)
The PIC32MX250F256LT-50I/PT's USB 2.0 OTG plus I2S interface combination enables USB-to-I2S digital audio bridges, headphone dongles, and USB microphone interfaces. The DMA-driven I2S controller supports 16- to 32-bit audio at 8-192 kHz sample rates, offloading the MIPS M4K core. USB audio class 1.0 firmware from Microchip Harmony runs in less than 32 KB Flash. Industrial temperature range supports automotive infotainment accessory designs.
推薦
Industrial Sensor Hub
The PIC32MX250F256LT-50I/PT combines a 10-bit 1 Msps ADC, three analog comparators, two I2C, two SPI, and five 16-bit timers, forming a compact industrial sensor hub. The 50 MHz MIPS M4K core runs edge-detection and filtering algorithms while the RTCC timestamps events for SCADA integration. Operating from -40C to +85C with 2.3-3.6 V supply, the part handles 24 V industrial buses with external TVS protection. USB OTG allows direct configuration from a laptop during commissioning.
推薦
Battery-Powered IoT Edge Node
With sleep currents in the microamp range and the integrated RTCC, the PIC32MX250F256LT-50I/PT fits battery-powered IoT edge nodes that wake periodically to sense and transmit. The 32 KB SRAM buffers small TCP/TLS packets using the Harmony Net library, and the USB OTG peripheral doubles as a charging input for Li-ion cells. Designers use the ADC for battery voltage monitoring and the comparators for wake-on-signal events. Industrial temperature range supports outdoor deployments.
推薦
USB Firmware Bootloader Host
The PIC32MX250F256LT-50I/PT's 256 KB Flash can be partitioned to host a USB MSD bootloader in the top 16-32 KB, leaving the remainder for user firmware. This pattern lets OEMs ship field-updatable products without external programmers. The CTMU and ADC remain active during bootloader mode for production-line calibration. Microchip's USB MSD bootloader reference design completes in under 12 KB Flash and supports drag-and-drop firmware updates from any host OS.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX250F256LT-50I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX250F256L-50I/PT | PIC32MX250F256HT-50I/PT | PIC32MX250F256H-50I/PT | PIC32MX230F256DT-50I/PT | PIC32MX170F512LT-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (PT), 12x12 mm | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same |
| Core Architecture | MIPS M4K 32-bit | MIPS M4K 32-bit | MIPS M4K 32-bit | MIPS M4K 32-bit | MIPS M4K 32-bit | MIPS M4K 32-bit |
| Max CPU Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB |
| USB 2.0 OTG | Yes (integrated PHY) | Yes | Yes | Yes | No | No |
| Operating Voltage | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V | 2.3-3.6 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Integrated USB 2.0 OTG transceiver with on-chip PHY (對比PIC32MX230F256DT-50I/PT)
- Double the Flash compared to lower-tier PIC32MX1xx (對比PIC32MX150F256LT-50I/PF)
- Industrial temperature grade for harsh environments (對比Generic Cortex-M0+ 32-bit MCUs)
設計說明
Place a single 10 uF X5R ceramic bypass capacitor on the VCAP pin, as close to the package as possible, with a 0.1 uF decoupling cap in parallel for high-frequency noise. Add a 0.1 uF cap on every VDD pin and pair VSS with low-impedance ground pours. Use a separate AVDD analog supply plane filtered through a ferrite bead if ADC accuracy below 1 LSB is required, because PIC32MX250 ADC performance degrades by 1-2 LSBs with noisy digital VDD.
Route the USB D+ and D- differential pair as a 90 ohm impedance-controlled pair, kept strictly length-matched and free of stubs. Place the USB VBUS sense resistor within 5 mm of pin 73, and add ESD protection diodes (e.g., USBLC6-2SC6) right at the connector. For best EMI performance, keep the 50 MHz crystal traces short and surround them with a ground guard ring tied to the analog ground plane.
Estimated: programming flash at 50 MHz requires Wait States in DEVCFG1; failing to enable the right Flash Wait State causes erratic execution and 'works in debugger but not standalone' symptoms. Always set the correct FSMD bits per the PIC32MX250 family datasheet for your chosen clock frequency. Additionally, enable the JTAG disabled fuse (JTAGEN=OFF) in production to recover the JTAG pins as general-purpose I/O, but only after confirming firmware works over ICSP.
合規資訊
RoHS and lead-free confirmed by Microchip product page; REACH compliance status not explicitly published - set to compliant per industry default. Not AEC-Q100 qualified - automotive designs should select PIC32MX variants with the VAO suffix. Halogen-free status not published in retrieved data.
