PIC32MX250F128CT-I/TL - 32-bit MCU, 128KB Flash, USB, 40MHz | Microchip
MPN: PIC32MX250F128CT-I/TL ✓ فعالPIC32MX250F128CT-I/TL نمای کلی
What is a PIC32MX microcontroller? A PIC32MX is Microchip's 32-bit MIPS-based microcontroller family, positioned between the 8-bit PIC16/PIC18 lines and the higher-end PIC32MZ family. These MCUs combine a Harvard-architecture MIPS32 M4K core with rich peripherals including USB, CAN, I2S, PMP graphics, and 10-bit ADC, targeting cost-sensitive embedded applications that need more performance and code space than 8-bit parts but do not require the complexity of a Cortex-M design.
Key differentiating specifications for this part include 50 MHz/83 DMIPS core capability (operated at 40 MHz in this speed grade), Peripheral Pin Select (PPS) for flexible signal routing, up to four channels of hardware DMA, and dedicated PLLs for CPU and USB clocks. The 36-VTLA package provides 19 general-purpose I/O pins with an exposed thermal pad for improved heat dissipation in compact designs.
The architecture implements a 5-stage pipeline, hardware multiply/divide, and a single-cycle 32-bit ALU, consuming approximately 0.5 mA/MHz active. Separate PLLs allow the CPU and USB module to clock independently, a key advantage over single-PLL MCU architectures where USB requires specific oscillator frequencies.
Typical applications include consumer audio peripherals (USB headphones, sound bars), low-cost graphics HMI with TFT panels, capacitive-touch user interfaces using CTMU, USB-to-UART bridges, and industrial sensor interfaces. The integrated USB 2.0 full-speed controller makes the PIC32MX250F128CT-I/TL particularly attractive for USB device-class designs such as HID, CDC, or vendor-specific endpoints.
Design consideration: route USB DP/DM traces as a 90 ohm differential pair, place the 27% crystal or resonator within 5 mm of the USB clock pins, and ensure the exposed pad is soldered to a continuous ground copper pour for thermal dissipation. The PPS feature requires careful pin assignment in the MPLAB X IDE configuration bits, since mis-mapping peripherals is the most common source of bring-up failures on PIC32MX silicon.
This page synthesizes distributor pricing, drop-in PIC32MX250 family alternatives, and practical design notes not found on the manufacturer product page alone.
جایگزین‌های drop-in برای PIC32MX250F128CT-I/TL — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC32MX250F128CT-I/TL (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Core Architecture, Package, USB, Operating Temperature.
PIC32MX250F128C-I/TL
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX250F128CT-V/TL
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX250F128CT-50I/TL
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX230F064D-I/TL
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX150F128CT-I/TL
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX250F128CT-I/TL حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Processor | MIPS32 M4K |
| Core Architecture | 32-bit RISC |
| Operating Frequency | 40 MHz |
| DMIPS Performance | 83 DMIPS (at 50 MHz) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| RAM | 32 KB |
| Number of I/O Pins | 19 |
| بسته‌بندی / کیس | 36-VTLA Exposed Pad (5x5 mm) |
| نوع نصب | Surface Mount |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| دمای کاری | -40 C to +85 C (Industrial) |
| USB | USB 2.0 Full-Speed (Device/Host/OTG) |
| Communication Interfaces | IrDA, LINbus, UART, I2C, SPI, I2S, PMP, USB |
| Peripherals | Brown-out Detect, DMA, POR, PWM, WDT |
| Connectivity | USB, IrDA, LINbus, I2C, SPI, UART |
| Oscillator Type | Internal |
| Data Converters | 10-bit ADC |
| Packaging | Tube |
پیکربندی پین PIC32MX250F128CT-I/TL
| پین 1 | RPB0/PWM1/PMD0/RB0 — PPS-remappable GPIO / PWM / Parallel Master Port data bit 0 |
| پین 2 | RPB1/PMD1/RB1 — PPS-remappable GPIO / Parallel Master Port data bit 1 |
| پین 3 | RPB2/SDA2/PMD2/RB2 — PPS GPIO / I2C2 SDA / PMP data bit 2 |
| پین 4 | RPB3/SCL2/PMD3/RB3 — PPS GPIO / I2C2 SCL / PMP data bit 3 |
| پین 5 | VDD — Core supply voltage (2.3 V to 3.6 V) |
| پین 6 | VSS — Ground reference |
| پین 7 | RPB4/PMD4/RB4 — PPS GPIO / PMP data bit 4 |
| پین 8 | RPB5/PMD5/RB5 — PPS GPIO / PMP data bit 5 |
| پین 9 | VSS — Ground reference |
| پین 10 | RC0 — PPS-remappable GPIO (Port C) |
| پین 11 | RC1 — PPS-remappable GPIO (Port C) |
| پین 12 | RC2 — PPS-remappable GPIO (Port C) |
| پین 13 | VUSB — USB 3.3 V regulator output (decoupling cap required) |
| پین 14 | D+ — USB D+ line (90 ohm differential) |
| پین 15 | D- — USB D- line (90 ohm differential) |
| پین 16 | VSS — Ground reference |
| پین 17 | RC3 — PPS-remappable GPIO (Port C) |
| پین 18 | RC4/SDI1/RC4 — PPS GPIO / SPI1 MISO |
| پین 19 | RC5/SDO1 — PPS GPIO / SPI1 MOSI |
| پین 20 | RC6 — PPS-remappable GPIO (Port C) |
| پین 21 | RC7 — PPS-remappable GPIO (Port C) |
| پین 22 | VSS — Ground reference |
| پین 23 | OSC1/RC12 — Crystal oscillator input or external clock input |
| پین 24 | OSC2/RC13 — Crystal oscillator output |
| پین 25 | VSS — Ground reference |
| پین 26 | RA0 — PPS-remappable GPIO (Port A) |
| پین 27 | RA1 — PPS-remappable GPIO (Port A) |
| پین 28 | PGED1/AN0/RP0/CN4/RB0 — Programming data / ADC input 0 / PPS GPIO (note: shared pin assignments) |
| پین 29 | PGEC1/AN1/RP1/CN5/RB1 — Programming clock / ADC input 1 / PPS GPIO |
| پین 30 | VSS — Ground reference |
| پین 31 | RA2 — PPS-remappable GPIO (Port A) |
| پین 32 | RA3 — PPS-remappable GPIO (Port A) |
| پین 33 | RA4 — PPS-remappable GPIO (Port A) |
| پین 34 | RA5 — PPS-remappable GPIO (Port A) |
| پین 35 | VSS — Ground reference |
| پین 36 | VDD — Core supply voltage (2.3 V to 3.6 V) |
کاربردهای معمول
PIC32MX250F128CT-I/TL مناسب است برای 6 کاربردs: USB Audio Headphones and Headsets, TFT Graphics HMI with Resistive Touch, Capacitive Touch Keypad / Control Panel, USB-to-UART Bridge Adapter, USB HID Game Controller, Low-Cost Industrial Sensor Module.
USB Audio Headphones and Headsets
The PIC32MX250F128CT-I/TL is an ideal host controller for USB audio peripherals because it integrates a USB 2.0 Full-Speed device controller with a dedicated USB PLL and two I2S/SPIs for direct codec connectivity. With 83 DMIPS of processing headroom, it can run Microchip's USB Audio Class 1.0 device stack plus volume/button HID logic in approximately 25-30 KB of flash, leaving the remaining 100 KB for DSP effects or custom firmware. The CTMU peripheral supports up to 16 capacitive touch buttons for play/pause/skip controls. Place the device within 5 mm of the USB connector and route DP/DM as a 90 ohm differential pair for compliance.
پیشنهادی
TFT Graphics HMI with Resistive Touch
The PIC32MX250F128CT-I/TL's Parallel Master Port (PMP) can drive small TFT panels (up to 480x272) at 30 fps using DMA-driven transfers, eliminating the need for an external graphics controller. The CTMU combined with the PMP's address latching supports a 4-wire resistive touch screen without an additional ADC IC. The 32 KB of SRAM buffers approximately one full screen frame (480x272x16-bit color = 261 KB), so partial-update strategies are required - draw only dirty regions. For designs needing more video memory, migrate to PIC32MX570 or PIC32MZ parts; the PIC32MX250 is suitable for icon-based or simple textual menus.
پیشنهادی
Capacitive Touch Keypad / Control Panel
The PIC32MX250F128CT-I/TL's on-chip CTMU provides a hardware-accelerated charge-time measurement engine that can sample up to 16 capacitive touch electrodes directly, with no external analog components. Each channel is scanned in approximately 50 us using a single GPIO plus a current source, allowing 16 keys to be polled at 100 Hz with negligible CPU load. The 128 KB flash accommodates Microchip's mTouch library plus user-defined slider/wheel logic. Industrial temperature rating and 2.3-3.6 V operation make the part appropriate for white-goods and industrial control panels.
پیشنهادی
USB-to-UART Bridge Adapter
The PIC32MX250F128CT-I/TL is a strong choice for USB-to-UART bridges thanks to its integrated USB 2.0 FS device, dual UART modules with hardware flow control, and 83 DMIPS headroom for protocol conversion. Microchip's USB CDC class driver adds a virtual COM port on the host with less than 10 KB of firmware, and the remaining flash supports baud rates up to 921600 bps with optional RS-485 driver enable generation. The 36-VTLA footprint fits into compact dongle form factors. Industrial temperature grade suits factory-floor debug tools.
پیشنهادی
USB HID Game Controller
The PIC32MX250F128CT-I/TL supports USB HID class drivers natively, allowing direct implementation of game controllers, keyboards, mice, or composite HID devices without licensing fees. The Peripheral Pin Select (PPS) feature allows the engineer to remap UART, SPI, and timer peripherals to almost any GPIO, simplifying PCB routing for ergonomic controller layouts. With 128 KB of flash and 32 KB of RAM, the part can drive a 32-button matrix plus a 4-axis analog joystick, all sampled at 1000 Hz through DMA. CTMU channels can detect capacitive shoulder triggers.
پیشنهادی
Low-Cost Industrial Sensor Module
The PIC32MX250F128CT-I/TL's combination of USB, UART, I2C, SPI, and a 10-bit ADC makes it suitable as a multi-protocol industrial sensor hub. The MCU can aggregate readings from external I2C sensors, perform digital filtering, and present them over USB CDC or RS-485. Industrial -40 C to +85 C temperature rating allows deployment in factory environments. The exposed thermal pad of the 36-VTLA package supports operation in enclosed IP65 housings without additional heatsinking. Microchip's free Harmony framework provides validated sensor drivers.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC32MX250F128CT-I/TL — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC32MX250F128C-I/TL | PIC32MX250F128CT-V/TL | PIC32MX250F128CT-50I/TL | PIC32MX230F064D-I/TL | PIC32MX150F128CT-I/TL |
|---|---|---|---|---|---|---|
| Package | 36-VTLA (5x5) | 36-VTLA (5x5) - identical | 36-VTLA (5x5) - identical | 36-VTLA (5x5) - identical | 36-VTLA (5x5) - identical | 36-VTLA (5x5) - identical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same |
| Max Frequency | 40 MHz | 40 MHz | 40 MHz | 50 MHz (+25%) | 40 MHz | 40 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 128 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 32 KB |
| USB | USB 2.0 FS | USB 2.0 FS - same | USB 2.0 FS - same | USB 2.0 FS - same | No USB | USB 2.0 FS - same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +105 C (AEC-Q100) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| PMP Graphics | Yes | Yes | Yes | Yes | Yes | No |
| CTMU Touch | Yes | Yes | Yes | Yes | Yes | No |
تفاوت‌های کلیدی
- Highest-integration USB MCU in PIC32MX1XX/2XX VTLA family (در مقابلPIC32MX230F064D-I/TL)
- Integrated PMP + CTMU vs PIC32MX150F128CT-I/TL (در مقابلPIC32MX150F128CT-I/TL)
- Automotive grade option in same footprint (در مقابلPIC32MX250F128CT-V/TL)
یادداشت‌های طراحی
Route the USB DP/DM pair as a 90 ohm differential (with reference to the USB 2.0 specification) directly from the package pins to the USB connector. Keep traces under 50 mm total length, match lengths to within 2 mm, and place the VUSB decoupling capacitor (4.7 uF) within 2 mm of pin 13. Place the crystal or resonator within 5 mm of pins 23/24 with a grounded guard ring. The exposed thermal pad must be soldered to a continuous ground copper pour of at least 25 mm^2 to meet thermal specifications.
The PIC32MX250F128CT-I/TL requires a single 2.3-3.6 V supply on VDD (pin 5 and pin 36 are tied together internally through the die). Place a 1 uF ceramic decoupling capacitor on each VDD pin plus a single 4.7 uF bulk capacitor at the regulator output. The VUSB pin requires its own 4.7 uF decoupling cap; this rail powers the internal USB transceiver and must not be back-fed into VDD. Add a 10 kohm pull-up on the MCLR reset pin for in-circuit serial programming (ICSP) entry.
Peripheral Pin Select (PPS) mis-configuration is the most common PIC32MX bring-up failure. The default PPS mapping after reset assigns most peripherals to specific default pins (see family datasheet Table 12-XX), but most designs need remapping. Configure PPS registers in the startup code BEFORE enabling the peripheral, otherwise the peripheral will not function on the chosen pin. Also note: the I2C module requires external pull-up resistors (typically 2.2 kohm at 400 kHz) - the internal weak pull-ups are too weak for reliable I2C bus operation.
The 36-VTLA 5x5 package achieves approximately 35 C/W thermal resistance (theta_JA) on a standard JEDEC 4-layer test board. At the maximum 40 MHz clock and full peripheral activity, the core consumes approximately 0.5 mA/MHz = 20 mA. At 3.6 V supply this represents 72 mW, leading to a 2.5 C junction rise above ambient - well within thermal limits for the -40 C to +85 C industrial rating. For sealed enclosures with no airflow, derate by 1.5x and verify junction temperature with a thermocouple on the exposed pad.
اطلاعات انطباق
RoHS and REACH compliant per Microchip product page. Industrial -40 C to +85 C temperature range; not AEC-Q100 qualified (choose PIC32MX250F128CT-V/TL for automotive applications). Halogen-free per Microchip environmental certification.
