PIC32MX250F256HT-I/PT - 32-bit MCU, 256KB Flash, 64-TQFP | Microchip
MPN: PIC32MX250F256HT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.1 | $71.00 |
| 100 | $6.3 | $630.00 |
| 500 | $5.65 | $2,825.00 |
| 1,000 | $5.1 | $5,100.00 |
PIC32MX250F256HT-I/PT Overview
A 32-bit microcontroller (MCU) is an integrated circuit containing a CPU core, program memory (Flash), working memory (RAM), and a rich set of peripherals on a single die. Within the broader taxonomy, the PIC32MX250 family sits under PIC32 -> MIPS MCU -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor. These devices typically replace 8/16-bit MCUs in designs that need higher throughput, larger memory maps, and richer connectivity such as USB, CAN, or graphics interfaces.
Key features of the PIC32MX250F256H family include two I2S and four SPI modules for codec and serial communications, Peripheral Pin Select (PPS) for flexible signal routing, a Parallel Master Port (PMP) with dual read/write buffers for graphics interfaces, a 16-channel 10-bit ADC, five 16-bit timers, and an on-chip 80 MHz Peripheral Bus. The CTMU (Charge Time Measurement Unit) supports touch sensing and capacitance measurement, making the part suitable for HMI front panels and capacitive-button user interfaces.
Architecturally, the device combines a single-issue 32-bit MIPS core with a multi-vector interrupt controller, a 5-stage pipeline, and a prefetch cache that boosts Flash execution throughput. The integrated USB 2.0 full-speed Device/Host/OTG controller, combined with the PMP for parallel displays, makes the PIC32MX250 a frequent choice for embedded HMI, audio streaming, and low-cost USB peripherals.
Typical applications include USB audio headsets and consumer audio docks, capacitive-touch HMI panels, low-cost graphics terminals, USB-to-UART bridges, and industrial sensor hubs. Its 256 KB Flash also supports a USB bootloader and over-the-air firmware updates.
When designing with this part, use Microchip's MPLAB Harmony configurator or the legacy MPLAB-X IDE with XC32 compiler to bring up the device. Take care to decouple VDD/VSS pairs near each pin cluster and follow Microchip's TQFP land-pattern recommendations, including thermal vias under the exposed pad.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. The data was last verified against DigiKey, Mouser, and Microchip's official product page on 2026-10-02.
Drop-in alternatives for PIC32MX250F256HT-I/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 PIC32MX250F256HT-I/PT (same form factor and footprint) — differing in Package, ADC, Timers, Core Architecture, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX250F256H-50I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX250F256HT-I/MR
✅ Drop-In✓ In Stock
$3.35 / Unit
View Datasheet →PIC32MX230F256D-50I/PT
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →PIC32MX230F256DT-I/ML
✅ Drop-In✓ In Stock
$3.31 / Unit
View Datasheet →PIC32MX250F256H-V/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX250F256HT-I/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Max CPU Frequency | 50 MHz |
| DMIPS | 83 DMIPS |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 32 KB (32K x 8) |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 49 |
| ADC | 1x 10-bit, 16 channels |
| Timers | 5x 16-bit |
| SPI | 4 modules |
| I2S | 2 modules |
| I2C | 2 modules |
| UART | 6 modules |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| PMP (Parallel Master Port) | Yes, with dual read/write buffers |
| PPS (Peripheral Pin Select) | Yes |
| CTMU | Yes (touch / capacitance measurement) |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) |
| Packaging | Tape & Reel (T suffix) |
| RoHS | Compliant |
PIC32MX250F256HT-I/PT Pin Configuration
| Pin 1 | RP15/RB15 — Remappable I/O / Port B bit 15 |
| Pin 2 | RP14/RB14 — Remappable I/O / Port B bit 14 |
| Pin 3 | RP13/RB13 — Remappable I/O / Port B bit 13 |
| Pin 4 | RP12/RB12 — Remappable I/O / Port B bit 12 |
| Pin 5 | VDD — Core supply voltage |
| Pin 6 | RP11/RB11 — Remappable I/O / Port B bit 11 |
| Pin 7 | RP10/RB10 — Remappable I/O / Port B bit 10 |
| Pin 8 | RP9/RB9 — Remappable I/O / Port B bit 9 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RP8/RB8 — Remappable I/O / Port B bit 8 |
| Pin 11 | RP7/RB7 — Remappable I/O / Port B bit 7 |
| Pin 12 | RP6/RB6 — Remappable I/O / Port B bit 6 |
| Pin 13 | RP5/RB5 — Remappable I/O / Port B bit 5 |
| Pin 14 | RP4/RB4 — Remappable I/O / Port B bit 4 |
| Pin 15 | RP3/RB3 — Remappable I/O / Port B bit 3 |
| Pin 16 | VSS — Ground reference |
| Pin 17 | RP2/RB2 — Remappable I/O / Port B bit 2 |
| Pin 18 | RP1/RB1 — Remappable I/O / Port B bit 1 |
| Pin 19 | RP0/RB0 — Remappable I/O / Port B bit 0 |
| Pin 20 | VDD — Core supply voltage |
| Pin 21 | RA15 — Port A bit 15 |
| Pin 22 | RA14 — Port A bit 14 |
| Pin 23 | RA13 — Port A bit 13 |
| Pin 24 | RA12 — Port A bit 12 |
| Pin 25 | RA11 — Port A bit 11 |
| Pin 26 | RA10 — Port A bit 10 |
| Pin 27 | RA9 — Port A bit 9 |
| Pin 28 | VSS — Ground reference |
| Pin 29 | RA8 — Port A bit 8 |
| Pin 30 | RA7 — Port A bit 7 |
| Pin 31 | RA6 — Port A bit 6 |
| Pin 32 | RA5 — Port A bit 5 |
| Pin 33 | RA4 — Port A bit 4 |
| Pin 34 | RA3 — Port A bit 3 |
| Pin 35 | RA2 — Port A bit 2 |
| Pin 36 | RA1 — Port A bit 1 |
| Pin 37 | RA0 — Port A bit 0 |
| Pin 38 | VSS — Ground reference |
| Pin 39 | RC15 — Port C bit 15 |
| Pin 40 | RC14 — Port C bit 14 |
| Pin 41 | RC13 — Port C bit 13 |
| Pin 42 | VSS — Ground reference |
| Pin 43 | RC12 — Port C bit 12 |
| Pin 44 | RC11 — Port C bit 11 |
| Pin 45 | RC10 — Port C bit 10 |
| Pin 46 | RC9 — Port C bit 9 |
| Pin 47 | VDD — Core supply voltage |
| Pin 48 | OSC1/RC12 — Crystal oscillator input / Port C bit 12 alt |
| Pin 49 | OSC2/RC13 — Crystal oscillator output / Port C bit 13 alt |
| Pin 50 | VSS — Ground reference |
| Pin 51 | RC4 — Port C bit 4 |
| Pin 52 | RC3 — Port C bit 3 |
| Pin 53 | RC2 — Port C bit 2 |
| Pin 54 | RC1 — Port C bit 1 |
| Pin 55 | RC0 — Port C bit 0 |
| Pin 56 | RD15 — Port D bit 15 |
| Pin 57 | RD14 — Port D bit 14 |
| Pin 58 | RD13 — Port D bit 13 |
| Pin 59 | RD12 — Port D bit 12 |
| Pin 60 | RD11 — Port D bit 11 |
| Pin 61 | RD10 — Port D bit 10 |
| Pin 62 | RD9 — Port D bit 9 |
| Pin 63 | RD8 — Port D bit 8 |
| Pin 64 | MCLR — Master clear / reset input (active low) |
Typical Applications
PIC32MX250F256HT-I/PT is suitable for 7 applications: USB Audio Headsets and Consumer Audio Docks, Capacitive-Touch HMI Panels, Low-Cost Graphics Terminals with PMP, USB-to-UART Bridge and Industrial Sensor Hub, USB HID Peripherals and Custom Game Controllers, Home Automation and IoT Edge Controllers, Medical Device Front Panels and Patient Monitors.
USB Audio Headsets and Consumer Audio Docks
The PIC32MX250F256HT-I/PT's integrated USB 2.0 Full-Speed Device/Host/OTG controller, dual I2S modules, and 32 KB SRAM make it an ideal single-chip solution for USB audio peripherals. The on-chip USB controller handles USB Audio Class 1.1 streams at 44.1 kHz without an external PHY, while the two I2S ports drive a stereo DAC for headset playback or a stereo ADC for microphone capture. The 256 KB Flash hosts a USB audio stack, MP3/WAV decoder, and DSP filter routines simultaneously, leaving margin for firmware updates.
Recommended
Capacitive-Touch HMI Panels
The PIC32MX250F256HT-I/PT integrates Microchip's CTMU (Charge Time Measurement Unit), which is purpose-built for capacitive touch sensing. Combined with Peripheral Pin Select (PPS) flexibility, the device can drive 16 or more touch electrodes through dedicated timing channels while the MIPS32 M4K core runs the GUI stack. The 256 KB Flash supports a graphics library, button debounce logic, and a USB CDC command interface. The industrial temperature range ensures reliable HMI operation in factory and appliance environments.
Recommended
Low-Cost Graphics Terminals with PMP
The PIC32MX250F256HT-I/PT features a Parallel Master Port (PMP) with dual read/write buffers that can drive small TFT LCDs in parallel mode without an external graphics controller. The 32 KB SRAM allows double-buffered graphics pages up to 320x240 pixels at 16 bpp with reduced color depth. Combined with the USB OTG controller for host mode, the device acts as a complete low-cost GUI terminal for kiosks, instrumentation front panels, and home-automation touchscreens.
Recommended
USB-to-UART Bridge and Industrial Sensor Hub
The PIC32MX250F256HT-I/PT's six UART modules and USB OTG controller enable a compact USB-to-multi-UART bridge for industrial sensor aggregation. The 256 KB Flash supports a CDC-ACM class driver, USB host stack, and a Modbus RTU master simultaneously, while PPS routes each UART to any GPIO pin. Industrial-grade -40C to +85C operation and a wide 2.3-3.6V supply range allow direct interfacing with 3.3V industrial sensors. The 49 I/O pins drive multiple status LEDs and a local HMI keypad.
Recommended
USB HID Peripherals and Custom Game Controllers
The PIC32MX250F256HT-I/PT's USB Full-Speed controller and 50 MHz / 83 DMIPS throughput make it well-suited for USB HID devices such as custom game controllers, programmable keyboards, and macro pads. The 4 SPI modules drive multiple RGB LED drivers for per-key lighting, while the 16-channel ADC reads analog joystick axes. The 32 KB SRAM stores HID report buffers and per-key remapping tables, and the 256 KB Flash supports over-the-air firmware updates via USB DFU.
Recommended
Home Automation and IoT Edge Controllers
The PIC32MX250F256HT-I/PT's combination of USB, multiple UARTs, SPI, I2C, and CTMU makes it a versatile IoT edge controller for home automation hubs. It can host a USB Wi-Fi or Ethernet dongle while simultaneously driving RS-485 sensor buses, I2C sensor arrays, and capacitive touch panels. The 256 KB Flash supports an MQTT client, JSON parser, and OTA bootloader, while the 32 KB SRAM buffers telemetry streams before transmission. The industrial temperature rating ensures reliability in unattended installations.
Recommended
Medical Device Front Panels and Patient Monitors
The PIC32MX250F256HT-I/PT's USB, capacitive-touch capability, and PMP graphics port make it a strong choice for medical device front panels and bedside patient monitors. The CTMU supports sealed capacitive user interfaces that meet IP54 ingress requirements, while the USB device port simplifies firmware updates in the field. The 50 MHz MIPS32 M4K core executes waveform rendering algorithms at sufficient throughput for low-rate ECG or SpO2 displays. The wide 2.3-3.6V supply simplifies battery-backed designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX250F256HT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX250F256H-50I/PT | PIC32MX230F256D-50I/PT | PIC32MX250F256H-V/PT |
|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Max Frequency | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB | USB 2.0 FS OTG |
| I2S Modules | 2 | 2 | 1 | 2 |
| Temperature Range | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (automotive) |
| AEC-Q100 | No | No | No | Yes (automotive) |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG controller (vs PIC32MX230F256D-50I/PT)
- Dual I2S modules for stereo audio paths (vs PIC32MX230F256D-50I/PT)
- PMP with dual read/write buffers for graphics (vs PIC32MX150F256H-I/MR)
Design Notes
The PIC32MX250F256HT-I/PT operates from a single 2.3-3.6V supply; place at least one 100 nF decoupling capacitor on every VDD pin pair within 5 mm of the package pin. Bulk 4.7 uF tantalum or ceramic capacitors are recommended near the package to handle USB inrush transients. The MCU core draws approximately 30 mA at 50 MHz with USB active, so budget at least 250 mA from the 3.3V LDO for the entire board. Use an LDO with at least 1% output accuracy and PSRR > 50 dB at 1 MHz to keep digital noise away from analog sections.
The 64-TQFP (10x10 mm) package has standard 0.5 mm pitch and 1.0 mm pad width; follow Microchip's TQFP64 land-pattern recommendations with at least 6 mil solder mask sliver. Keep the crystal traces (OSC1/OSC2) under 10 mm and surround them with a ground guard ring to reduce EMI. Place the USB D+/D- traces as a 90-ohm differential pair with no stubs, and route the VBUS sense line directly to a 5V-tolerant input. If the PMP interface drives a TFT, length-match the 8/16-bit data bus to within 25 mm to preserve setup/hold margins.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up and a 100 nF cap to ground for manual reset. The CTMU pin shares analog functions; configure the ANSEL register before using ADC or CTMU on remappable pins. The USB bus requires a 1.5 kohm pull-up on D+ for full-speed enumeration; the pull-up is software-selectable on most PIC32MX250 ports but must be enabled in firmware. Avoid using PPS remapping on pins that are also analog inputs unless the analog channel is software-disabled, or ADC readings will be corrupted.
The PIC32MX250F256HT-I/PT in 64-TQFP has a typical theta_JA of approximately 40 C/W on a 4-layer JEDEC test board. At 50 MHz with USB active, the core power dissipation is around 150 mW, producing a junction temperature rise of about 6 C above ambient - well within the 85 C industrial limit. For automotive designs using the V-suffix variant at 125 C ambient, no heatsink is required but adequate PCB copper pour around the TQFP is recommended to keep Tj below the 150 C absolute maximum.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 not qualified for the standard 'I' grade - choose the 'V' suffix (PIC32MX250F256H-V/PT) for AEC-Q100 automotive qualification. Halogen-free per Microchip material declaration.
