PIC32MX254F128D-V/PT - 32-bit MCU 128KB Flash USB | Microchip
MPN: PIC32MX254F128D-V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.18 | $61.80 |
| 100 | $5.52 | $552.00 |
| 500 | $4.96 | $2,480.00 |
| 1,000 | $4.45 | $4,450.00 |
PIC32MX254F128D-V/PT Overview
What is a PIC32MX microcontroller? The PIC32MX is a family of 32-bit flash microcontrollers from Microchip Technology built on the MIPS32 M4K core. They occupy the mid-range performance tier of Microchip's 32-bit MCU portfolio, bridging 8-bit PIC16/PIC18 and higher-performance Cortex-M devices. PIC32MX devices integrate rich peripherals (USB, CAN, ADC, comparators, CTMU, RTCC) while retaining the PIC ecosystem's MPLAB X IDE and Harmony framework compatibility.
Key features of the PIC32MX254F128D-V/PT include: a 72 MHz maximum CPU clock, 128KB program Flash, 32KB SRAM, full-speed USB 2.0 device/host/OTG, three analog comparators, a 13-channel 10-bit 1 Msps ADC, and Peripheral Pin Select (PPS) for flexible pin mapping. The XLP extensions cut run current to ~20 µA/MHz and deep-sleep current to the nA range, with fast wake-up from deep sleep.
The device uses a 5-stage pipeline MIPS32 M4K core with single-cycle multiply and hardware divide. Separate PLLs serve the system clock and the 48 MHz USB clock, allowing CPU and USB to run independently. The integrated charge time measurement unit (CTMU) supports capacitive touch sensing, while the RTCC module keeps accurate time in deep sleep.
Typical applications include automotive body and HMI modules, USB peripherals (CDC/HID/MSD), low-power IoT edge nodes, capacitive touch keypads, and small graphic HMI displays. The wide temperature range and AEC-Q100 qualification also suit industrial control boards exposed to harsh environments.
When designing with this part, note the 44-pin TQFP exposed pad must be soldered to the PCB ground plane for thermal dissipation and signal integrity. Use MPLAB X IDE with XC32 compiler for firmware development. The automotive-grade (-V) variant differs from the industrial-grade (-I) only in qualification testing and temperature range.
Drop-in alternatives for PIC32MX254F128D-V/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 PIC32MX254F128D-V/PT (same form factor and footprint) — differing in Package, Core Architecture, Maximum CPU Speed, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX254F128D-I/PT
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →PIC32MX254F128DT-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.62 / Unit
View Datasheet →PIC32MX250F128D-V/PT
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC32MX174F256D-I/PT
✅ Drop-In✓ In Stock
$3.21 / Unit
View Datasheet →PIC32MX230F128H-I/PT
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC32MX254F128D-V/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| CPU Width | 32-bit |
| Maximum CPU Clock | 72 MHz |
| Program Flash | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Supply Voltage | 2.3 V to 3.6 V |
| Operating Temperature | -40 C to +105 C (automotive -V grade) |
| Package | 44-pin TQFP (10x10x1 mm) |
| Mounting Type | Surface Mount (Tray) |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 1 Msps |
| Analog Comparators | 3 |
| Peripheral Pin Select (PPS) | Yes |
| DMA | Up to 4 channels |
| UART / I2C / SPI | 2 UART, 2 I2C, 2 SPI (with PPS remapping) |
| CTMU | Yes (Capacitive Touch) |
| RTCC | Yes (Real-Time Clock/Calendar) |
| AEC-Q100 Grade | Yes (automotive qualified) |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC32MX254F128D-V/PT Pin Configuration
| Pin 1 | RPB0/AN0/C1INA/CTED1/RB0 — GPIO RB0 / analog input AN0 / comparator 1 input A |
| Pin 2 | RPB1/AN1/C1INB/CTED2/RB1 — GPIO RB1 / analog input AN1 / comparator 1 input B |
| Pin 3 | RPB2/AN2/C1IND/C2INB/RB2 — GPIO RB2 / analog input AN2 / comparator inputs |
| Pin 4 | RPB3/AN3/C1INC/C2INA/RB3 — GPIO RB3 / analog input AN3 / comparator inputs |
| Pin 5 | VDD — Positive supply voltage (3.3V typical) |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RPB4/AN4/C1INB/C2IND/RB4 — GPIO RB4 / analog input AN4 |
| Pin 8 | SDA1/RPB5/PMD5/RB5 — I2C1 SDA / GPIO RB5 / PMP data 5 |
| Pin 9 | SCL1/RPB6/PMD6/RB6 — I2C1 SCL / GPIO RB6 / PMP data 6 |
| Pin 10 | RPB7/PMD7/RB7 — GPIO RB7 / PMP data 7 |
| Pin 11 | VSS — Ground reference |
| Pin 12 | VDD — Positive supply voltage (3.3V typical) |
| Pin 13 | SOSCI/RPC0/RC0 — Secondary oscillator input / GPIO RC0 |
| Pin 14 | SOSCO/RPC1/RC1 — Secondary oscillator output / GPIO RC1 |
| Pin 15 | RPB8/AN8/RB8 — GPIO RB8 / analog input AN8 |
| Pin 16 | RPB9/AN9/RB9 — GPIO RB9 / analog input AN9 |
| Pin 17 | TMS/RPB10/AN10/RB10 — JTAG TMS / GPIO RB10 / AN10 |
| Pin 18 | TCK/RPB11/AN11/RB11 — JTAG TCK / GPIO RB11 / AN11 |
| Pin 19 | TDI/RPB12/AN12/RB12 — JTAG TDI / GPIO RB12 / AN12 |
| Pin 20 | TDO/RPB13/AN13/RB13 — JTAG TDO / GPIO RB13 / AN13 |
| Pin 21 | RPB14/CVREF/AN14/PMCS1/RB14 — GPIO RB14 / comparator Vref output / AN14 |
| Pin 22 | RPB15/AN15/PMCS2/RB15 — GPIO RB15 / AN15 |
| Pin 23 | VSS — Ground reference |
| Pin 24 | VDD — Positive supply voltage (3.3V typical) |
| Pin 25 | D-/RG3 — USB D- (Full-Speed USB data line) |
| Pin 26 | D+/RG2 — USB D+ (Full-Speed USB data line) |
| Pin 27 | VBUS — USB VBUS sense input |
| Pin 28 | VUSB — USB internal transceiver supply / bypass |
| Pin 29 | RPC6/RPC6 — GPIO RC6 |
| Pin 30 | RPC7/RPC7 — GPIO RC7 |
| Pin 31 | RPC8/RPC8 — GPIO RC8 |
| Pin 32 | RPC9/RPC9 — GPIO RC9 |
| Pin 33 | VDD — Positive supply voltage (3.3V typical) |
| Pin 34 | RPG6/RG6 — GPIO RG6 |
| Pin 35 | RPG7/RG7 — GPIO RG7 |
| Pin 36 | RPG8/RG8 — GPIO RG8 |
| Pin 37 | RPG9/RG9 — GPIO RG9 |
| Pin 38 | OA1OUT/AN0/CVD — Op-amp 1 output / analog input |
| Pin 39 | OA1IN-/AN1 — Op-amp 1 inverting input |
| Pin 40 | OA1IN+/AN2 — Op-amp 1 non-inverting input |
| Pin 41 | VREF-/CVREF- — ADC negative reference |
| Pin 42 | VREF+/CVREF+ — ADC positive reference |
| Pin 43 | AVDD — Analog supply voltage |
| Pin 44 | AVSS — Analog ground |
Typical Applications
PIC32MX254F128D-V/PT is suitable for 6 applications: Automotive Body Control Modules, USB HID / CDC Peripheral Devices, Capacitive Touch Keypads, Low-Power IoT Edge Sensor Nodes, Industrial HMI Displays, Appliance and White-Goods Control.
Automotive Body Control Modules
The PIC32MX254F128D-V/PT is purpose-built for automotive body and HMI control applications. Its AEC-Q100 qualification, -40 C to +125 C operating range, and 72 MHz MIPS32 M4K core handle tasks such as CAN-LIN gateway bridging, lighting control, door module logic, and HVAC user interface. The 128KB Flash supports OSEK/OSEKtime or AUTOSAR-like layered software stacks, while 32KB SRAM buffers communication queues. Integrated USB serves diagnostics interfaces during end-of-line programming and dealer service tool connectivity. The XLP deep-sleep mode with sub-µA current preserves battery life when the vehicle is parked.
Recommended
USB HID / CDC Peripheral Devices
The PIC32MX254F128D-V/PT delivers full-speed USB 2.0 device/host/OTG at 12 Mbps with on-chip transceiver and dedicated 48 MHz USB PLL. The 72 MHz core and 32KB SRAM comfortably run USB stacks (HID, CDC, MSD) plus application logic for custom peripherals such as data loggers, configurators, and instrument front panels. PPS allows flexible mapping of USB D+/D- and interrupt endpoints without external mux logic. The device supports bootloader mode over USB, enabling field firmware upgrades. With MPLAB Harmony USB stack, typical HID enumeration completes in under 200 ms.
Recommended
Capacitive Touch Keypads
The PIC32MX254F128D-V/PT integrates the CTMU (Charge Time Measurement Unit) for capacitive touch sensing without an external touch IC. Each analog pin can be configured as a touch channel, and the device supports up to 13 channels with hardware-driven charge timing for noise-immune readings. The 10-bit ADC, 3 analog comparators, and PPS assist with proximity sensing and backlight control. With 128KB Flash and 32KB SRAM, the MCU runs Microchip's mTouch libraries while maintaining responsive host communication. Deep-sleep currents in the nA range extend battery life on wireless touch remotes.
Recommended
Low-Power IoT Edge Sensor Nodes
The PIC32MX254F128D-V/PT's XLP extensions suit battery-powered sensor nodes that spend most of their time in deep sleep. Run current of ~20 µA/MHz at 3.3V and deep-sleep current in the nA range (with RTCC running) enable multi-year battery life on 2xAA cells. The 13-channel ADC, 3 comparators, and CTMU handle diverse sensors (temperature, humidity, light, capacitive level). RTCC keeps accurate time during sleep, while DMA offloads data movement. The USB interface supports easy configuration from a host PC during installation or service. XLP wake-up from sleep in microseconds makes it suitable for event-driven sensing.
Recommended
Industrial HMI Displays
The PIC32MX254F128D-V/PT's 72 MHz core, 128KB Flash, and 32KB SRAM handle small graphic HMI panels driving LCD or OLED displays up to QVGA resolution. PPS remaps UART/SPI/I2C to any digital pin, simplifying PCB routing to displays, keypads, and external sensors. The 10-bit ADC reads analog inputs such as potentiometers and thermistors, while the comparators detect threshold events without CPU intervention. AEC-Q100 qualification and the wide temperature range suit industrial control panels in factory automation, HVAC, and machinery where reliability is critical.
Recommended
Appliance and White-Goods Control
The PIC32MX254F128D-V/PT targets appliance control boards (washing machines, dishwashers, ovens, refrigerators) requiring reliable mixed-signal control. Three analog comparators handle zero-crossing detection on AC lines, the 10-bit ADC reads temperature sensors (NTC, PTC), and PWM outputs drive motor control or TRIAC firing. The 72 MHz MIPS core runs RTOS-based control loops for motor management. AEC-Q100 grade and the -40 C to +125 C range cover the thermal stress of appliance environments, while the 44-pin TQFP package fits within space-constrained board layouts.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX254F128D-V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX254F128D-I/PT | PIC32MX250F128D-V/PT | PIC32MX174F256D-I/PT | PIC32MX230F128H-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10x1 mm) | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same |
| Core Architecture | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum CPU Clock | 72 MHz | 72 MHz | 50 MHz | 40 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | No USB | No USB |
| AEC-Q100 Grade | Yes (automotive, -40 to +125 C) | No (industrial, -40 to +85 C) | Yes (automotive, -40 to +125 C) | No (industrial, -40 to +85 C) | No (industrial, -40 to +85 C) |
| Operating Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
| Approx. Unit Price (1k qty) | ~$4.45 | ~$3.95 | ~$4.20 | ~$4.60 | ~$3.80 |
Key Differentiators
- 72 MHz CPU vs 50 MHz on PIC32MX250 family (vs PIC32MX250F128D-V/PT)
- AEC-Q100 automotive qualification with -40 to +125 C range (vs PIC32MX254F128D-I/PT)
- Integrated Full-Speed USB 2.0 (vs PIC32MX230F128H-I/PT)
- Larger 128KB Flash than PIC32MX1xx (256KB option in 174 family uses more area) (vs PIC32MX174F256D-I/PT)
Design Notes
Estimated: at 72 MHz full speed, the PIC32MX254F128D-V/PT core draws roughly 20 mA. USB-enabled devices should use a separate 3.3V LDO for VUSB (pin 28) and decouple with a 0.1 µF + 4.7 µF combination. Use MCP1700 (250 mA LDO, 1.6 µA Iq) for battery-powered designs to preserve XLP deep-sleep currents. Place bulk decoupling (10 µF ceramic + 0.1 µF) within 5 mm of each VDD/VSS pin pair.
The 44-pin TQFP exposed pad (pin 44 region / die-attach paddle) must be soldered to a PCB ground copper pour for thermal dissipation. Estimated: without a ground pour, theta_JA can exceed 70 C/W; with a 1 square inch 2-oz copper pour, theta_JA drops to ~30 C/W. At full 72 MHz with all peripherals active (~20 mA from 3.3V), internal dissipation is roughly 66 mW, well below thermal limits.
Route USB D+/D- as a 90 ohm differential pair with controlled impedance. Keep traces short and length-matched within 2 mm. Place the VUSB bypass capacitor (0.1 µF + 4.7 µF) within 3 mm of the VUSB pin. JTAG signals (TMS, TCK, TDI, TDO) require series resistors (~33 ohm) near the MCU for signal integrity. Separate analog AVSS/AVDD traces from noisy digital switching lines, with a ferrite bead or pi-filter on AVDD if ADC performance is critical.
Do not exceed 3.6V on any VDD pin - the part has no internal 5V tolerance. PPS-mapped peripherals must be unlocked by writing the IOLOCK bit; otherwise peripheral functions will not appear on their mapped pins. USB enumeration requires a stable 48 MHz USB PLL clock - ensure the oscillator start-up timer is allowed to complete before USB attach. JTAG is multiplexed on RB10-RB13; disable JTAG in firmware (DDPCON bit) to recover those pins for GPIO if not needed.
Compliance Information
AEC-Q100 qualified per the -V suffix. RoHS and lead-free compliant per Microchip product environmental compliance documentation.
