PIC32MX250F128DT-I/TL - 32-bit MCU 128KB Flash USB OTG | Microchip
MPN： PIC32MX250F128DT-I/TL ✓ 啟用中PIC32MX250F128DT-I/TL 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripherals onto one silicon die. The PIC32MX family belongs to the broader taxonomy of embedded processors: microcontroller -> 32-bit MCU -> MIPS-based MCU -> Microchip PIC32MX series. These devices target applications requiring deterministic real-time control combined with rich connectivity, sitting between 8-bit PIC16/PIC18 MCUs and the higher-performance ARM Cortex-M based SAM family.
Key features include Peripheral Pin Select (PPS) for flexible peripheral-to-pin mapping, five 16-bit timers/capture/compare, a 10-bit 1 Msps ADC with up to 13 input channels, mTouch capacitive touch sensing, and on-chip temperature measurement. The device supports 2.3V to 3.6V single-supply operation with 0.5 mA/MHz active current consumption, and provides JTAG and 2-wire ICD debugging interfaces.
The architecture uses a 5-stage pipeline MIPS32 M4K core with hardware multiply/divide, achieving 1.56 DMIPS/MHz (83 DMIPS at 50 MHz). The 32 KB SRAM is partitioned for instruction and data, and the 128 KB Flash supports self-programming under firmware control for in-field updates.
Typical applications include USB audio class devices, USB HID peripherals, embedded graphics with PMP-driven TFT displays, capacitive touch user interfaces, and low-power sensor hubs. The combination of USB OTG, audio I2S, and PMP makes this MCU a strong fit for multimedia and human-machine interface designs.
When designing with this part, pay close attention to VTLA PCB land pattern requirements and thermal pad soldering. The USB peripheral requires precise 48 MHz clocking from the on-chip PLL, and the JTAG pins are multiplexed on I/O ports, so debugger sharing must be planned at the board level.
This page synthesizes distributor pricing, parametric drop-in alternatives from the same PIC32MX2XX family, and practical design considerations not found in the standalone datasheet.
直接替換替代品，適用於 PIC32MX250F128DT-I/TL — 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： PIC32MX250F128DT-I/TL （相同外形與佔位） — 差異在於 ADC, Package, USB, Timers, Operating Temperature.
PIC32MX250F128C-I/TL
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX250F128CT-I/TL
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX230F256DT-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX170F256DT-50I/TL
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX150F128DT-I/TL
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX250F128DT-V/TL
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX250F128DT-I/TL 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 40 MHz |
| Performance | 83 DMIPS (50 MHz equivalent core) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| 供應電壓 | 2.3 V to 3.6 V |
| 工作溫度 | -40 C to +85 C (Industrial) |
| I/O Pins | 33 to 34 |
| 封裝 | 44-VTLA (6x6 mm) with exposed thermal pad |
| USB | USB 2.0 full-speed device/host/OTG |
| Serial Interfaces | 2x I2S/SPI, I2C, UART/USART |
| Timers | Five 16-bit timers with capture/compare |
| ADC | 10-bit, up to 13 channels, 1 Msps |
| PMP (Parallel Master Port) | Yes - for graphics and external memory |
| Peripheral Pin Select (PPS) | Yes |
| Touch Sensing | mTouch capacitive touch support |
| On-chip Temperature Sensor | Yes |
| Debug Interface | JTAG and 2-wire ICD |
| RoHS 狀態 | Compliant |
| MSL (Moisture Sensitivity Level) | MSL3 (per exposed-pad VTLA) |
PIC32MX250F128DT-I/TL 44-vtla (6x6 mm) with exposed thermal pad 腳位配置指南
PIC32MX250F128DT-I/TL（44-vtla (6x6 mm) with exposed thermal pad 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC32MX250F128DT-I/TL.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX250F128DT-I/TL 適用於 7 應用s: USB Audio Class Device, USB HID Peripheral / Custom Input Device, TFT Graphics Display Controller, Capacitive Touch User Interface, Industrial Sensor Hub / Modbus Bridge, USB Mass Storage / Data Logger, Embedded Audio Processing / DSP Front-End.
USB Audio Class Device
The PIC32MX250F128DT-I/TL's USB 2.0 full-speed OTG controller combined with two I2S/SPI interfaces makes it ideal for USB audio class (UAC1) designs such as USB headphones, USB DACs, and USB microphones. The 40 MHz MIPS32 M4K core runs the USB stack, audio buffering, and sample-rate conversion with margin, while the two I2S ports accept external stereo ADC/DAC codecs up to 192 kHz. The 32 KB SRAM holds USB descriptors, audio packets, and double-buffered sample memory without external RAM. Designers connect the USB D+/D- pins through the required 15k pull-downs, tie the VBUS sense to an ADC or interrupt pin, and clock the PLL from a 12 MHz crystal to lock the 48 MHz USB rate.
推薦
USB HID Peripheral / Custom Input Device
With its USB OTG controller and 40 DMIPS-class MIPS core, the PIC32MX250F128DT-I/TL serves well as a USB Human Interface Device (HID) for custom keyboards, gaming controllers, and industrial input panels. The Peripheral Pin Select (PPS) feature reassigns USB, UART, and timer signals to any GPIO, simplifying PCB routing for matrix-scan keyboards or button arrays. The on-chip 10-bit ADC samples analog joysticks or potentiometers while the USB endpoint handles interrupt transfers at up to 8 kHz polling rate. Designers typically pair it with an external ESD-protected USB connector and route D+/D- as a 90-ohm differential pair.
推薦
TFT Graphics Display Controller
The integrated Parallel Master Port (PMP) on the PIC32MX250F128DT-I/TL provides an 8-bit or 16-bit parallel bus to drive small TFT LCD panels directly, making it suitable for HMI products with 320x240 or smaller displays. The 128 KB Flash stores frame buffers, fonts, and menu assets, while the 32 KB SRAM holds active screen pages and DMA scratch memory. Designers interface the PMP to TFT controller ICs like the SSD1963 or directly to ILI9341-based panels using the 8080-style parallel protocol. The mTouch peripheral complements the display for capacitive touch buttons and sliders in the same UI.
推薦
Capacitive Touch User Interface
Microchip's mTouch firmware library, running on the PIC32MX250F128DT-I/TL, turns up to 13 ADC channels into capacitive sensing inputs for buttons, sliders, and proximity sensors. The CTMU (Charge Time Measurement Unit) provides hardware timestamping with 1 ns resolution, enabling reliable touch detection even through 3-5 mm glass overlays. The 128 KB Flash accommodates mTouch decoding algorithms plus the main application, while PPS lets designers remap touch channels to any GPIO. Typical use cases include appliance control panels, IoT smart-home switches, and medical-device keypads where mechanical switches would compromise sealing.
推薦
Industrial Sensor Hub / Modbus Bridge
With two UARTs, two I2S/SPI, I2C, and USB, the PIC32MX250F128DT-I/TL acts as a multi-protocol industrial sensor hub aggregating Modbus RTU over RS-485, I2C sensor data, and SPI ADC readings, then exposing the consolidated data via USB CDC to a host PC. The 10-bit ADC samples analog sensors up to 1 Msps, while the 32 KB SRAM buffers sensor frames. The industrial -40 C to +85 C temperature grade permits deployment in factory cabinets and outdoor enclosures. Designers typically add an external RS-485 transceiver like the MAX3485 and a 5V-to-3.3V LDO for the MCU rail.
推薦
USB Mass Storage / Data Logger
The USB OTG controller with internal host capability lets the PIC32MX250F128DT-I/TL read from a USB flash drive for portable data-logger applications, while the 128 KB Flash hosts the FAT32 stack and logging firmware. Designers connect a USB Type-A receptacle through appropriate power-switch and over-current ICs to read/write log files on removable media. The 32 KB SRAM and PMP can additionally drive an SD card or external parallel flash for higher-capacity local storage, with the MCU performing background data aggregation from analog and digital sensors.
推薦
Embedded Audio Processing / DSP Front-End
With dual I2S ports and 83 DMIPS of CPU throughput, the PIC32MX250F128DT-I/TL can run audio processing tasks such as sample-rate conversion, EQ, mixing, and basic effects in firmware. Designers feed digital microphones or codecs into one I2S port, process the stream on the MIPS core, and output the result via the second I2S to a power amplifier. The 32 KB SRAM supports small audio buffers without external memory, and the JTAG port enables on-chip debug of real-time audio paths. This architecture suits low-cost Bluetooth audio sink dongles, hearing-aid front-ends, and intercom systems.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX250F128DT-I/TL — 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 | PIC32MX250F128C-I/TL | PIC32MX250F128CT-I/TL | PIC32MX230F256DT-I/ML | PIC32MX170F256DT-50I/TL | PIC32MX150F128DT-I/TL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-VTLA (6x6 mm) | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 50 MHz | 40 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 256 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB |
| USB OTG | Yes (full-speed) | Yes | Yes | Yes | Yes | No |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Unit Price (1000 pcs, USD, as of 2026-10) | 4.45 | 4.40 (est. same die) | 4.45 | 5.10 | 4.80 | 3.95 |
| Core | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
主要差異化特點
- Same-pin compatibility across the PIC32MX2XX 44-VTLA family (對比PIC32MX230F256DT-I/ML)
- Higher CPU clock option available in same footprint (對比PIC32MX170F256DT-50I/TL)
- Lower-cost USB-less variant in same pinout (對比PIC32MX150F128DT-I/TL)
設計說明
The 44-VTLA package has an exposed thermal pad on the underside that must be soldered to a copper pour on the PCB for both thermal dissipation and electrical ground. The land pattern must include 5-9 thermal vias (0.3 mm drill) under the pad connecting top copper to inner ground planes. Without proper pad soldering, the device may overheat and exhibit intermittent resets under USB or heavy CPU load.
USB designs require a precise 48 MHz clock locked to the USB frame timing. Source the primary oscillator from a 12 MHz or 8 MHz crystal with low total error (crystal tolerance + capacitor tolerance + temperature drift < 100 ppm cumulative). Do not use the internal RC oscillator for USB operation - the jitter will fail USB compliance. Also route D+/D- as a 90-ohm differential pair with matched length to +/- 2 mm.
Peripheral Pin Select (PPS) remapping lets you place USB, UART, SPI, and timers on alternative I/O pins but introduces input latency of one peripheral clock cycle. For high-speed SPI peripherals (above 10 MHz) or time-critical interfaces, choose fixed-pin assignments where available. Keep JTAG/trace pins on dedicated positions to avoid conflicts with PPS-mapped peripherals during debugger operation.
The PIC32MX250F128DT-I/TL draws 0.5 mA/MHz active and roughly 20-30 uA in sleep mode. For battery-powered designs, use the deep-sleep mode with RTCC running from the secondary 32 kHz oscillator to achieve multi-year coin-cell life. Decouple VDD with one 10 uF bulk + one 100 nF ceramic per VDD pin, placed within 3 mm of the pins.
合規資訊
Per Microchip product page. RoHS and REACH compliant; lead-free reflow compatible. Not AEC-Q100 qualified - choose PIC32MX250F128DT-V/TL automotive grade for AEC-Q100 applications.
