PIC32MX250F128D-50I/PT - 50MHz 32-bit MCU 128KB Flash USB | Microchip
MPN: PIC32MX250F128D-50I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.6 | $2,600.00 |
PIC32MX250F128D-50I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of on-chip peripherals. The PIC32MX250F128D belongs to the PIC32MX family of 32-bit microcontrollers, which itself falls under the broader category of MIPS-based embedded microcontrollers within the MCU semiconductor hierarchy (MCU -> microcontroller -> embedded processor -> semiconductor IC). The M4K core implements a 5-stage pipeline and the MIPS32 instruction set, giving the PIC32MX a significant performance uplift over legacy PIC16/PIC24 parts while retaining the same MPLAB X toolchain and Harmony framework.
Key features include 1.56 DMIPS/MHz core efficiency, less than 0.5 mA/MHz active current draw, an integrated 1 Msps 13-channel 10-bit ADC, mTouch capacitive touch support, and 1 ns high-resolution timer/capture. Five 16-bit timer/counters, five IC/OC/PWM channels, two I2C and two UART modules, and a Parallel Master Port for external memory or graphics interfaces round out the peripheral set. The PT package exposes 34 user I/O pins through the PPS routing matrix.
Typical applications include USB HID devices (HID-class peripherals, CDC virtual COM ports), 16-bit audio playback with the on-chip I2S codec interface, low-cost graphics HMI panels using PMP with TFT controllers, and capacitive touch user interfaces. The combination of USB OTG, DSP-extended instructions (DSP ASE), and a small footprint make this part well suited to consumer audio docks and small HMI panels.
When designing with this part, observe the 2.3 V to 3.6 V supply range and provide a 10 uF bulk decoupling capacitor on VDDCORE. PPS must be configured before peripherals are enabled or pins will remain in their default high-impedance state.
Drop-in alternatives for PIC32MX250F128D-50I/PT — 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 PIC32MX250F128D-50I/PT (same form factor and footprint) — differing in ADC, Package, Timers, I/O Pins, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX270F256D-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX230F256D-50I/PT
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →PIC32MX170F256D-50I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX154F128D-I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC32MX150F128D-50I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX250F128D-50I/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| Performance | 83 DMIPS (1.56 DMIPS/MHz) |
| Program Flash | 128 KB |
| Data RAM | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Active Current | <0.5 mA/MHz |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | TQFP-44 (PT) 10x10 mm |
| I/O Pins | 34 (via Peripheral Pin Select) |
| ADC | 10-bit, 1 Msps, up to 13 channels |
| USB | USB 2.0 full-speed device/host/OTG |
| Timers | 5 x 16-bit, 5 x IC/OC/PWM |
| Communication | 2x UART, 2x SPI, 2x I2C, 2x I2S |
| Parallel Master Port (PMP) | Yes (graphics interface) |
| DMA | 8-channel |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX250F128D-50I/PT Pin Configuration
| Pin 1 | OSC1/CLKI/RA3 — Crystal oscillator input / external clock / GPIO |
| Pin 2 | OSC2/CLKO/RA2 — Crystal oscillator output / GPIO |
| Pin 3 | MCLR — Master clear reset (active low) |
| Pin 4 | PGED3/RPB0 — Programming data / GPIO via PPS |
| Pin 5 | PGEC3/RPB1 — Programming clock / GPIO via PPS |
| Pin 6 | RPB2/SDA2 — PPS I/O / I2C2 SDA |
| Pin 7 | RPB3/SCL2 — PPS I/O / I2C2 SCL |
| Pin 8 | VSS — Ground |
| Pin 9 | VDD — Positive supply (2.3-3.6V) |
| Pin 10 | VBUS — USB VBUS detect input |
| Pin 11 | D+/RPB6 — USB D+ / GPIO via PPS |
| Pin 12 | D-/RPB7 — USB D- / GPIO via PPS |
| Pin 13 | AN0/CVD7/RPB8 — Analog input / GPIO via PPS |
| Pin 14 | AN1/RPC0 — Analog input / GPIO via PPS |
| Pin 15 | AN2/CVD2/RPC1 — Analog input / GPIO via PPS |
| Pin 16 | AN3/CVD3/RPC2 — Analog input / GPIO via PPS |
| Pin 17 | AN4/CVD4/RPC3 — Analog input / GPIO via PPS |
| Pin 18 | AN5/RPA0 — Analog input / GPIO via PPS |
| Pin 19 | AN6/RPA1 — Analog input / GPIO via PPS |
| Pin 20 | AN7/RPC4 — Analog input / GPIO via PPS |
| Pin 21 | VSS — Ground |
| Pin 22 | VDD — Positive supply (2.3-3.6V) |
| Pin 23 | AN8/RPC5 — Analog input / GPIO via PPS |
| Pin 24 | AN9/RPC6 — Analog input / GPIO via PPS |
| Pin 25 | AN10/RPC7 — Analog input / GPIO via PPS |
| Pin 26 | AN11/RPC8 — Analog input / GPIO via PPS |
| Pin 27 | AN12/RPC9 — Analog input / GPIO via PPS |
| Pin 28 | TMS/RPA7 — JTAG TMS / GPIO via PPS |
| Pin 29 | TCK/RPA8 — JTAG TCK / GPIO via PPS |
| Pin 30 | TDO/RPA9 — JTAG TDO / GPIO via PPS |
| Pin 31 | TDI/RPA10 — JTAG TDI / GPIO via PPS |
| Pin 32 | AN13/CVD13/RPB13 — Analog input / GPIO via PPS |
| Pin 33 | AN14/CVD14/RPB14 — Analog input / GPIO via PPS |
| Pin 34 | AN15/CVD15/RPB15 — Analog input / GPIO via PPS |
| Pin 35 | VSS — Ground |
| Pin 36 | VDDCORE — Internal regulator output (1.8V), 10 uF bulk required |
| Pin 37 | ENVREG/RPA0 — Enable internal voltage regulator |
| Pin 38 | PGED1/RPB4 — Programming data / GPIO via PPS |
| Pin 39 | PGEC1/RPB5 — Programming clock / GPIO via PPS |
| Pin 40 | PMA0/RA4 — PMP address bit 0 / GPIO |
| Pin 41 | PMA1/RA5 — PMP address bit 1 / GPIO |
| Pin 42 | PMA2/RA14 — PMP address bit 2 / GPIO |
| Pin 43 | PMA3/RA15 — PMP address bit 3 / GPIO |
| Pin 44 | PMRD/RA1 — PMP read strobe / GPIO |
Typical Applications
PIC32MX250F128D-50I/PT is suitable for 6 applications: USB HID Peripheral Device, Audio Playback with I2S DAC, Low-Cost Graphics HMI Panel, Capacitive Touch User Interface, Industrial Sensor Hub, Consumer Audio Dock.
USB HID Peripheral Device
The PIC32MX250F128D-50I/PT's integrated USB 2.0 full-speed OTG controller with on-chip pull-up/pull-down resistors makes it ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. The 50 MHz MIPS32 M4K core provides sufficient bandwidth for polling up to 8 endpoint descriptors plus composite device classes. The internal USB voltage regulator requires only a 1 uF bypass capacitor on VBUS. Pair with the Microchip USB stack in MPLAB Harmony to ship a HID class driver in minutes.
Recommended
Audio Playback with I2S DAC
The PIC32MX250F128D-50I/PT integrates two I2S interfaces that pair directly with external 24-bit audio DACs such as the Microchip MCP4728 or Texas Instruments PCM5102A. The MIPS32 DSP-extended instruction set accelerates MP3, AAC, and FLAC decode software in real time at 44.1 kHz stereo. The 32 KB SRAM holds roughly 4 KB of compressed audio plus decoder state. The PT package's exposed pad improves thermal performance for always-on audio docks.
Recommended
Low-Cost Graphics HMI Panel
The PIC32MX250F128D-50I/PT's Parallel Master Port (PMP) directly drives external TFT controllers and graphic SRAM at up to 50 MHz, enabling low-cost HMI panels with 320x240 or 480x272 resolution. The 8-channel DMA engine offloads framebuffer transfers to the PMP without CPU intervention. The 128 KB Flash stores UI bitmaps and fonts while the 32 KB SRAM holds the active framebuffer. Microchip's MPLAB Harmony Graphics Suite provides a drag-and-drop UI builder for rapid prototyping.
Recommended
Capacitive Touch User Interface
The PIC32MX250F128D-50I/PT supports Microchip's mTouch capacitive touch sensing libraries, which can scan up to 13 capacitive buttons or sliders through any GPIO pin. The on-chip 1 Msps ADC plus the high-resolution 1 ns timer/capture enable proximity detection and water-tolerant touch algorithms. The -40C to +85C industrial temperature range suits appliance front panels. Pin count supports up to 13 buttons with one LED per button, eliminating external LED drivers.
Recommended
Industrial Sensor Hub
The PIC32MX250F128D-50I/PT's 13-channel 10-bit ADC, multiple UART/SPI/I2C interfaces, and 8-channel DMA make it well suited for industrial sensor hubs aggregating data from thermocouples, pressure sensors, and accelerometers. The -40C to +85C industrial rating handles factory floor environments. The USB OTG port provides a CDC virtual COM port for configuration, while the I2S port can stream audio for acoustic emission monitoring.
Recommended
Consumer Audio Dock
The PIC32MX250F128D-50I/PT powers consumer audio docks by combining USB device mode for digital audio input, I2S for DAC output, and the DSP-extended MIPS instructions for real-time audio processing. The 32 KB SRAM holds enough compressed audio buffers for gapless playback, while the 128 KB Flash stores firmware plus on-board DSP effects. The exposed pad TQFP package provides adequate thermal dissipation in sealed enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX250F128D-50I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX270F256D-I/PT | PIC32MX230F256D-50I/PT | PIC32MX170F256D-50I/PT | PIC32MX154F128D-I/PT | PIC32MX150F128D-50I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Core Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash | 128 KB | 256 KB | 256 KB | 256 KB | 128 KB | 128 KB |
| RAM | 32 KB | 64 KB | 64 KB | 64 KB | 32 KB | 32 KB |
| USB OTG | Yes | Yes | Yes | No | No | Yes |
| PMP Graphics | Yes | Yes | No | Yes | Yes | No |
| I2S Modules | 2 | 2 | 0 | 2 | 2 | 0 |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Pin-compatible upgrade path to double memory (vs PIC32MX270F256D-I/PT)
- Higher density I2S + PMP peripheral combination (vs PIC32MX230F256D-50I/PT)
- Integrated USB OTG with internal pull-up resistors (vs PIC32MX170F256D-50I/PT)
Design Notes
Estimated: at 50 MHz with USB active and PMP continuous, the device draws approximately 25 mA (0.5 mA/MHz core + USB + I/O). A 100 mA LDO such as Microchip MCP1700 is sufficient. Place a 10 uF ceramic + 0.1 uF decoupling pair within 5 mm of the VDDCORE pin (pin 36). The exposed thermal pad of the PT package must be soldered to a 0.5 square inch copper pour for adequate thermal dissipation under industrial temperature stress.
Route the USB differential pair (D+/D- on pins 11/12) as a 90 ohm differential trace with matched length within 150 mil. Place the VBUS pin (pin 10) ESD protection (TVS diode such as USBLC6-2) within 3 mm of the connector. The 44-pin TQFP requires 0.8 mm pitch routing, with power traces at least 12 mil wide for 2.3-3.6V distribution. Avoid routing digital signals beneath the PMP address/data bus to prevent capacitive coupling into the 10-bit ADC measurements.
Configure Peripheral Pin Select (PPS) registers before enabling any digital peripheral or pins will remain in their default high-impedance state, causing USB enumeration failures, I2C bus stuck-low conditions, and UART no-output symptoms. The PGED3/PGEC3 pins (4/5) used for ICSP must not be repurposed via PPS or in-circuit programming will be blocked. Use the CONFIG bits to disable JTAG port pins if not using JTAG, freeing GPIO for application use.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications consider PIC32MX250F128D-50I/PT-VO grade if available. Lead-free and halogen-free packaging confirmed by Microchip environmental compliance documentation.