PIC32MX250F128DT-V/ML - 40MHz 32-bit MCU, USB, 128KB Flash | Microchip
MPN: PIC32MX250F128DT-V/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.87 | $48.70 |
| 100 | $4.3 | $430.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.6 | $3,600.00 |
PIC32MX250F128DT-V/ML Overview
A 32-bit microcontroller (MCU) is a programmable system-on-chip that integrates a CPU core, program Flash, data SRAM, and a rich peripheral set in one device. PIC32MX parts are Microchip's MIPS32-based 32-bit MCU family that bridges 8/16-bit PIC legacy code to modern ARM-class 32-bit workloads, occupying the power-management IC / microcontroller tier within the semiconductor hierarchy. Within that hierarchy, the PIC32MX250 sub-family is the entry-level 32MX USB-enabled variant targeting cost-sensitive embedded graphics, HMI, and audio designs.
Key features include 34 usable I/O lines, supply voltage 2.3 V to 3.6 V, 1 ns high-resolution timer capture, on-chip temperature sensor, mTouch capacitive-touch hardware, five 16-bit general-purpose timers, a 10-bit 1 Msps ADC (up to 13 channels), and CTMU/ICSP trace support. The -V suffix denotes the -40 C to +105 C automotive/industrial operating range and the T suffix denotes tape-and-reel packaging.
Architecturally, the device uses a single-core MIPS32 M4K RISC pipeline with hardware multiply/divide and a tightly-coupled prefetch module; combined with the PMP and USB-OTG, it enables direct driving of graphical LCDs and USB peripherals without external bus bridges. Compared with 8-bit PIC16/PIC18 parts, the PIC32MX250 executes instructions ~10x faster and offers substantially more deterministic interrupt response thanks to a hardware shadow register set.
Typical applications include automotive infotainment and HVAC human-machine interfaces, USB HID peripherals (keyboards, mice, custom input devices), portable medical measurement instruments, industrial control panels with capacitive touch, graphics terminal modules, and low-cost audio docking stations with I2S codec connectivity.
A key design tip is to follow Microchip's "Minimum USB Connection Requirements" (one VBUS sense resistor, ESD protection on D+/D-, and 47 nF decoupling on VUSB) to pass USB compliance on the first revision, and to allocate the exposed thermal pad as a single solid copper pour with 9 thermal vias to dissipate the ~140 mW typical operating power.
This page synthesizes Microchip datasheet specifications, AEC-Q100 automotive qualification, current distributor pricing, drop-in alternatives from the PIC32MX1XX/2XX family, and practical design notes not found in a single source.
Drop-in alternatives for PIC32MX250F128DT-V/ML — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX250F128DT-V/ML (same form factor and footprint) — differing in Package, ADC, Operating Temperature, AEC-Q100, AEC-Q100 Qualification.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX250F128D-V/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128D-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F256DT-V/ML
✅ Drop-In✓ In Stock
$2.96 / Unit
View Datasheet →PIC32MX230F064DT-V/ML
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC32MX170F256DT-V/ML
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC32MX150F128DT-V/ML
✅ Drop-In✓ In Stock
$2.31 / Unit
View Datasheet →PIC32MX250F128DT-V/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 40 MHz (50 MHz capable / 83 DMIPS) |
| Program Flash | 128 KB |
| Data SRAM | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature Range (V suffix) | -40 C to +105 C |
| I/O Pins | 34 |
| Package | 44-pin QFN (8x8 mm) with exposed thermal pad |
| USB | USB 2.0 full-speed device / host / OTG |
| I2S / SPI Modules | 2 |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| General Purpose Timers | 5 x 16-bit |
| ADC | 10-bit, up to 1 Msps |
| AEC-Q100 | Qualified |
| RoHS / Lead-Free | Compliant (Pb-free) |
PIC32MX250F128DT-V/ML Pin Configuration
| Pin 1 | RB9 — General purpose I/O / PPS |
| Pin 2 | RB10 — General purpose I/O / PPS |
| Pin 3 | RB11 — General purpose I/O / PPS |
| Pin 4 | RB12 — General purpose I/O / PPS |
| Pin 5 | RB13 — General purpose I/O / PPS / AN11 |
| Pin 6 | RB14 — General purpose I/O / PPS / AN12 |
| Pin 7 | RB15 — General purpose I/O / PPS / AN13 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | VDD — Positive supply (2.3-3.6 V) |
| Pin 10 | RA0 — General purpose I/O / AN0 |
| Pin 11 | RA1 — General purpose I/O / AN1 |
| Pin 12 | RA2 — General purpose I/O / AN2 / VREF- |
| Pin 13 | RA3 — General purpose I/O / AN3 / VREF+ |
| Pin 14 | RA4 — General purpose I/O / AN4 |
| Pin 15 | RA5 — General purpose I/O / AN5 |
| Pin 16 | RA6 — General purpose I/O / AN6 |
| Pin 17 | RA7 — General purpose I/O / AN7 |
| Pin 18 | AVDD — Analog positive supply |
| Pin 19 | AVSS — Analog ground |
| Pin 20 | RA9 — General purpose I/O |
| Pin 21 | RA10 — General purpose I/O |
| Pin 22 | RA11 — General purpose I/O |
| Pin 23 | RA12 — General purpose I/O |
| Pin 24 | RA13 — General purpose I/O |
| Pin 25 | RA14 — General purpose I/O |
| Pin 26 | RA15 — General purpose I/O |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply (2.3-3.6 V) |
| Pin 29 | RB0 — General purpose I/O / AN8 / PGED1 |
| Pin 30 | RB1 — General purpose I/O / AN9 / PGEC1 |
| Pin 31 | RB2 — General purpose I/O / AN10 |
| Pin 32 | RB3 — General purpose I/O / AN11 |
| Pin 33 | RB4 — General purpose I/O |
| Pin 34 | RB5 — General purpose I/O |
| Pin 35 | RB6 — General purpose I/O |
| Pin 36 | RB7 — General purpose I/O |
| Pin 37 | RB8 — General purpose I/O |
| Pin 38 | VUSB — USB transceiver supply (3.3 V typical) |
| Pin 39 | D+ — USB data plus |
| Pin 40 | D- — USB data minus |
| Pin 41 | VBUS — USB VBUS sense input |
| Pin 42 | OSC1 — Crystal oscillator input |
| Pin 43 | OSC2 — Crystal oscillator output |
| Pin 44 | MCLR — Master clear / reset (active low) |
| Pin 45 | EP — Exposed thermal pad - tie to VSS |
Typical Applications
PIC32MX250F128DT-V/ML is suitable for 6 applications: Automotive Infotainment HMI Panel, USB HID Peripheral / Custom Input Device, Portable Medical Measurement Instrument, Industrial Control Panel with Capacitive Touch, Audio Docking Station with I2S Codec, Graphics Terminal / HMI Display Module.
Automotive Infotainment HMI Panel
The PIC32MX250F128DT-V/ML's -V (105 C) AEC-Q100 qualification and integrated Parallel Master Port (PMP) make it ideal for driving 320x240 TFT graphic LCDs in automotive center-stack and HVAC human-machine interfaces. With 40 MHz / 83 DMIPS, the M4K core refreshes QVGA framebuffers at 30+ fps while servicing CAN/I2C inputs; the on-chip mTouch peripheral supports capacitive slider/button replacement for rotary knobs. Compared with PIC16F designs, the PIC32MX250 drops BOM count by removing an external graphics controller.
Recommended
USB HID Peripheral / Custom Input Device
The integrated USB 2.0 full-speed OTG controller lets the PIC32MX250F128DT-V/ML enumerate directly as a USB keyboard, mouse, game controller, or custom HID without external PHY chips. The 40 MHz core leaves 50% CPU headroom for HID report polling at 1 kHz; 128 KB Flash holds full USB stacks plus application logic; 32 KB SRAM handles HID ring buffers. AEC-Q100 qualification supports automotive USB dongles and factory-floor operator panels.
Recommended
Portable Medical Measurement Instrument
The PIC32MX250F128DT-V/ML's 10-bit 1 Msps ADC with up to 13 analog channels, 5x 16-bit timers with 1 ns capture resolution, and on-chip temperature sensor fit handheld pulse oximeters, glucometers, and bedside monitoring front-ends. The 2.3-3.6 V supply range lets the device run directly from a single Li-ion cell with boost converter. The -V grade (105 C) tolerates autoclave-grade sterilization cycles in instrument re-entry.
Recommended
Industrial Control Panel with Capacitive Touch
The on-chip mTouch capacitive-touch hardware and CTMU enable the PIC32MX250F128DT-V/ML to drive 8-12 touch buttons and sliders directly, replacing mechanical switches in factory control panels. The PMP and I2S interfaces also support audio prompts for operator feedback. With -40 to +105 C operation, the part survives cabinet-temperature environments; PPS allows remapping serial interfaces to any I/O pin for easier EMC-compliant PCB layout.
Recommended
Audio Docking Station with I2S Codec
Two I2S/SP I modules let the PIC32MX250F128DT-V/ML connect to a 24-bit stereo DAC/ADC for USB-to-I2S audio docks, headphone amplifiers, and Bluetooth-audio bridge boards. DMA-driven I2S transfers free the CPU for USB audio class-1.0 streaming at 48 kHz / 24-bit; 32 KB SRAM buffers three stereo frames at low latency. The PMP can also drive a small status LCD alongside audio.
Recommended
Graphics Terminal / HMI Display Module
The Parallel Master Port (PMP) drives graphical LCDs, OLEDs, and external graphics controllers without an address/data bus arbiter. The PIC32MX250F128DT-V/ML's 40 MHz bus timing supports 8-bit PMP at 10 MHz pixel rate, suitable for 320x240 QVGA panels with 4-bit grayscale. The two I2S modules additionally support touchscreen audio feedback in point-of-sale terminals and information kiosks.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX250F128DT-V/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX250F128D-V/ML | PIC32MX250F128D-I/ML | PIC32MX230F256DT-V/ML | PIC32MX230F064DT-V/ML |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB |
| Data SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB |
| CPU Clock (max) | 40 MHz (50 MHz capable) | 40 MHz | 50 MHz | 40 MHz | 40 MHz |
| USB 2.0 OTG | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C | -40 C to +105 C | -40 C to +105 C |
| AEC-Q100 | Qualified | Qualified | Not qualified (industrial grade) | Qualified | Qualified |
| I/O Pins | 34 | 34 | 34 | 34 | 34 |
| Packaging Media | Tape & Reel | Tray | Tray | Tape & Reel | Tape & Reel |
Key Differentiators
- AEC-Q100 qualified with -V (105 C) automotive temperature grade (vs PIC32MX250F128D-I/ML)
- On-chip USB 2.0 full-speed OTG with integrated transceiver (vs PIC32MX170F256DT-V/ML)
- Dual I2S/SP I modules for stereo audio codec interfaces (vs PIC32MX230F064DT-V/ML)
Design Notes
Place a 100 nF decoupling capacitor within 2 mm of every VDD/AVDD pin and a 4.7 uF bulk tantalum or ceramic at the package entry point. The VUSB pin requires its own 47 nF decoupling capacitor per the PIC32MX USB hardware checklist; bypassing VUSB is the most common cause of USB enumeration failures on first prototypes. Estimated: at 40 MHz / full peripheral activity, IDD is approximately 30-40 mA; at sleep (deep sleep, RTCC running) IDD drops to ~30 uA.
Tie the exposed thermal pad (pin 45) directly to a solid VSS copper pour with at least 9 thermal vias (0.3 mm drill, 0.6 mm pad) on a 1.0 mm grid to dissipate the ~140 mW typical operating power. The 44-QFN pad improves theta_JA from ~35 C/W (no vias) to ~22 C/W (9-via array). For automotive -V (105 C) operation, this thermal management is essential to keep junction temperature below the 125 C maximum.
Do not leave the VBUS pin floating - USB OTG requires VBUS sensing on pin 41 to detect attach/detach. A common pitfall is to also forget that PGEC1/PGED1 (RB1/RB0) must be pulled low or high at reset to select the correct ICSP channel for the PICkit programmer. Forgetting this results in a 'no device detected' error from MPLAB X. Always configure the unused I/O pins as outputs (not floating inputs) to minimize current draw and EMI.
Route the USB D+/D- pair as a 90-ohm differential impedance match, length-matched to within 150 mils. Place the 27-ohm series termination resistors within 4 mm of the MCU pins. Keep the USB traces away from switching regulator nodes and crystal oscillator traces. A common PCB layout error is to route USB over a split ground plane - always maintain an unbroken ground reference under the USB pair.
Use Peripheral Pin Select (PPS) to remap serial interfaces to I/O pins that are physically adjacent to their external connectors - this keeps PCB traces short and minimizes EMI. Place the 8 MHz or 12 MHz crystal within 5 mm of OSC1/OSC2 with a grounded guard ring; use NPO/C0G capacitors for the crystal load caps to ensure frequency stability across the -40 to +105 C automotive range.
Compliance Information
AEC-Q100 qualified per Microchip product page (V temperature suffix denotes automotive grade). RoHS and REACH compliant per Microchip material declaration. Lead-free matte-tin finish on /ML package. Halogen-free status not explicitly stated in the verified data - see Microchip material declaration for confirmation.