PIC32MX254F128DT-V/PT - 32-bit MCU, 128KB Flash, USB | Microchip
MPN: PIC32MX254F128DT-V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.15 | $41.50 |
| 100 | $3.71 | $371.00 |
| 500 | $3.32 | $1,660.00 |
| 1,000 | $2.96 | $2,960.00 |
PIC32MX254F128DT-V/PT Overview
A 32-bit microcontroller (MCU) is an integrated computing system on a single die that combines a CPU core, program memory, data memory, peripherals, and I/O. PIC32MX parts sit in the hierarchy microcontroller -> embedded processor -> semiconductor IC, and are commonly chosen when designs need 32-bit arithmetic performance with deterministic low-power behavior. PIC32MX2x devices extend the PIC32MX1x/2x 28/36/44-pin family by adding XLP (eXtreme Low Power) run, sleep, and deep-sleep currents while raising the system clock on 44-pin variants to 72 MHz.
Key features of this device include 128 KB Flash (128K x 8), 32 KB SRAM, an 8-channel 10-bit 1 Msps ADC, five 16-bit timers/counters, four UART, two SPI, two I2C, and two I2S/SPI audio interfaces. XLP modes such as Deep Sleep pull core current down to microamp levels while preserving RTCC and a wake source, allowing battery-powered nodes to live for years on a single cell. The MIPS M4K core executes most instructions in one cycle and provides single-cycle multiply, suitable for DSP-like pre-processing.
Architecturally the device pairs a 5-stage MIPS32 pipeline with tightly-coupled SRAM for low-latency access. The USB OTG PHY, comparators, and CTMU are integrated on-die, removing the external PHY or analog blocks typical of older 16-bit PIC MCUs and shortening BOM cost. A JTAG/2-wire debug port enables in-circuit programming and live debug with MPLAB X IDE.
Typical applications include USB audio peripherals (headsets, USB speakers, MIDI controllers), IoT sensor hubs, low-power handhelds, automotive HMI clusters, USB to UART bridges, and embedded HMIs. Designers pick this part when they need USB connectivity, lots of GPIO, and on-chip analog with a wide temperature window. Reference companions include the MCP2200 USB-UART bridge and MCP1700 LDO regulator for 3.3 V rails. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX254F128DT-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 PIC32MX254F128DT-V/PT (same form factor and footprint) — differing in ADC, Operating Temperature, Package, CTMU, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX254F128D-I/PT
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →PIC32MX254F128D-V/PT
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →PIC32MX250F128DT-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX154F128DT-V/PT
✅ Drop-In✓ In Stock
$3.48 / Unit
View Datasheet →PIC32MX170F256DT-50I/PT
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →PIC32MX230F256DT-V/PT
✅ Drop-In✓ In Stock
$1.61 / Unit
View Datasheet →PIC32MX254F128DT-V/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 72 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| USB Controller | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, 1 Msps, 9 channels (dedicated + shared) |
| Analog Comparators | 3 |
| UART | 4 |
| SPI | 2 (+ 2 I2S/SPI shared) |
| I2C | 2 |
| 16-bit Timers/Counter | 5 |
| CTMU | Yes |
| RTCC | Yes |
| Operating Temperature | -40C to +105C (V grade) |
| Package | 44-pin TQFP (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
PIC32MX254F128DT-V/PT Pin Configuration
| Pin 1 | RPB0 — Remappable I/O, PGED1 (programming clock) |
| Pin 2 | RPB1 — Remappable I/O, PGEC1 (programming data) |
| Pin 3 | RPB2 — Remappable I/O, SDA2 (I2C2 data) |
| Pin 4 | RPB3 — Remappable I/O, SCL2 (I2C2 clock) |
| Pin 5 | VSS — Ground |
| Pin 6 | RPB4 — Remappable I/O, USBID |
| Pin 7 | RPB6 — Remappable I/O, AN6 |
| Pin 8 | RPB7 — Remappable I/O, AN7 |
| Pin 9 | RPC0 — Remappable I/O |
| Pin 10 | RPC1 — Remappable I/O |
| Pin 11 | RPC2 — Remappable I/O |
| Pin 12 | RPC3 — Remappable I/O |
| Pin 13 | RPC4 — Remappable I/O |
| Pin 14 | RPC5 — Remappable I/O |
| Pin 15 | RPC6 — Remappable I/O |
| Pin 16 | RPC7 — Remappable I/O |
| Pin 17 | RPA0 — Remappable I/O, VREF+ |
| Pin 18 | RPA1 — Remappable I/O, VREF- |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply 2.3-3.6 V |
| Pin 21 | RPA2 — Remappable I/O, OCM |
| Pin 22 | RPA3 — Remappable I/O |
| Pin 23 | RPB8 — Remappable I/O, AN8 |
| Pin 24 | RPB9 — Remappable I/O, AN9, CTMU |
| Pin 25 | VSS — Ground |
| Pin 26 | VDD — Positive supply 2.3-3.6 V |
| Pin 27 | RPB10 — Remappable I/O |
| Pin 28 | RPB11 — Remappable I/O |
| Pin 29 | RPB12 — Remappable I/O |
| Pin 30 | RPB13 — Remappable I/O |
| Pin 31 | RPB14 — Remappable I/O, VCAP |
| Pin 32 | RPB15 — Remappable I/O, OCM |
| Pin 33 | VSS — Ground |
| Pin 34 | VDD — Positive supply 2.3-3.6 V |
| Pin 35 | OSC1 — Crystal oscillator input |
| Pin 36 | OSC2 — Crystal oscillator output |
| Pin 37 | D+ — USB D+ data line |
| Pin 38 | D- — USB D- data line |
| Pin 39 | VUSB — USB transceiver supply 3.3 V |
| Pin 40 | RPF0 — Remappable I/O |
| Pin 41 | RPF1 — Remappable I/O |
| Pin 42 | RPF2 — Remappable I/O |
| Pin 43 | RPF3 — Remappable I/O |
| Pin 44 | RPF4 — Remappable I/O |
Typical Applications
PIC32MX254F128DT-V/PT is suitable for 6 applications: USB Audio Peripherals (headsets, speakers, MIDI), IoT Sensor Hubs and Home Automation Gateways, Automotive HMI Clusters and In-Cabin Modules, USB-to-UART / USB-to-SPI Bridges, Low-Power Handheld Instrumentation, Industrial HMIs with Capacitive Touch.
USB Audio Peripherals (headsets, speakers, MIDI)
The PIC32MX254F128DT-V/PT is purpose-built for USB audio peripherals such as USB headsets, desktop speakers, and MIDI controllers, where its integrated USB 2.0 Full-Speed OTG controller eliminates the external PHY normally required for USB connectivity. With 128 KB of Flash and 32 KB of SRAM, the part holds a USB audio class driver plus a small DSP pre-processing loop, while the two I2S/SPI channels can feed an external DAC or codec. Operating at 72 MHz the MIPS32 M4K core achieves a deterministic interrupt response under USB 1 ms frame timing, critical for glitch-free audio streaming. The XLP deep-sleep mode and RTCC allow standby currents below 1 mA when audio is muted, ideal for bus-powered designs that must respect USB suspend current limits.
Recommended
IoT Sensor Hubs and Home Automation Gateways
For IoT sensor hubs and home automation gateways, the PIC32MX254F128DT-V/PT combines USB connectivity for PC docking with UART, SPI, and I2C for sensor expansion. The Charge Time Measurement Unit (CTMU) provides on-chip capacitance touch sensing for up to 9 channels, removing the need for an external touch controller in user-interface panels. Three analog comparators handle threshold detection of analog sensors, while the RTCC preserves wall-clock time during deep sleep at microamp currents. With five 16-bit timers the MCU can drive PWM-controlled LEDs, motor control loops, and time-multiplexed sensor sampling without external timing chips. The 72 MHz MIPS M4K core runs an MQTT-SN or CoAP stack comfortably in 128 KB Flash.
Recommended
Automotive HMI Clusters and In-Cabin Modules
The V temperature grade of PIC32MX254F128DT-V/PT qualifies the device for non-safety automotive HMI clusters and in-cabin modules where ambient temperatures reach +105C. USB OTG enables firmware updates via a service-port USB connector, while the CTMU supports backlit capacitive touch panels for HVAC and infotainment controls. With 9 ADC channels the MCU monitors analog sensors such as temperature probes and ambient light sensors without an external analog front-end. The 44-pin TQFP footprint has 35 usable I/O pins, providing generous GPIO for keypad scanning, LED driving, and CAN-style UART bridges. AEC-Q100 grade parts such as the related PIC32MX1xx series demonstrate that PIC32MX2xx devices meet automotive qualification for non-safety applications.
Recommended
USB-to-UART / USB-to-SPI Bridges
In USB-to-UART and USB-to-SPI bridge applications, the PIC32MX254F128DT-V/PT acts as a CDC-ACM or vendor-class USB device exposing four UARTs or two SPI buses to a host PC. The on-chip USB OTG PHY removes the external PHY BOM cost, and 32 KB of SRAM buffers USB packets efficiently up to Full-Speed 12 Mbps. With 72 MHz of processing headroom, the part can simultaneously translate USB CDC commands to SPI register reads and forward I2C traffic at 400 kHz. Programmable GPIOs map to modem-control signals (RTS, CTS, DTR, DSR) for legacy serial devices, while the XLP deep-sleep mode reduces idle bridge current below 100 uA when the host suspends the USB bus.
Recommended
Low-Power Handheld Instrumentation
For low-power handheld instrumentation such as portable multimeters, barcode scanners, and medical data loggers, the PIC32MX254F128DT-V/PT combines XLP deep-sleep currents under 1 uA with the ability to wake on RTCC, comparator, or external edge events. The CTMU generates precise microamp-level current sources for resistance and capacitance measurement loops, replacing discrete analog front-ends. With 128 KB Flash the part stores calibration constants, user interface strings, and measurement logs without external EEPROM. The USB OTG interface allows direct charging and data upload to a PC, eliminating the need for a separate programming connector. The 44-pin TQFP also provides easy hand-solderable rework compared to QFN variants during prototype bring-up.
Recommended
Industrial HMIs with Capacitive Touch
The PIC32MX254F128DT-V/PT fits industrial HMI panels where 9 channels of CTMU-based capacitive touch plus USB host capability is needed for firmware updates via USB stick. The 10-bit 1 Msps ADC multiplexes analog sensor inputs such as pressure transducers and rotary encoders to a single ADC without external analog muxes. With five 16-bit timers, the MCU drives up to 10 PWM outputs for LED dimming, motor control, or haptic feedback. Operating from -40C to +105C, the V-grade device handles unconditioned factory cabinets and outdoor enclosures. The 44-pin TQFP's 35 I/O pins are sufficient for keypad matrices, character LCDs, and TFT displays up to 320x240 resolution with on-chip DMA.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX254F128DT-V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX254F128D-I/PT | PIC32MX250F128DT-V/PT | PIC32MX154F128DT-V/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same |
| CPU Speed | 72 MHz | 72 MHz | 50 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| USB OTG | Yes (USB 2.0 FS OTG) | Yes | Yes | No |
| Operating Temperature | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C | -40C to +105C |
| ADC | 10-bit, 1 Msps, 9 channels | 10-bit, 1 Msps, 9 channels | 10-bit, 1 Msps, 9 channels | 10-bit, 1 Msps, 9 channels |
Key Differentiators
- Automotive V temperature grade at 72 MHz in TQFP-44 (vs PIC32MX254F128D-I/PT)
- Highest CPU speed in the 254/254 family at 44-pin TQFP (vs PIC32MX250F128DT-V/PT)
- Full USB 2.0 FS OTG with on-chip PHY (vs PIC32MX154F128DT-V/PT)
Design Notes
The PIC32MX254F128DT-V/PT must be powered from a 2.3 V to 3.6 V supply with VUSB tied to 3.3 V when USB is used. Place a 10 uF bulk capacitor and a 100 nF ceramic decoupling capacitor within 3 mm of the VDD pins (pin 20, 26, 34). Tie unused VDD pins to the same rail; tie unused VSS pins to ground. If USB is unused, VUSB can be left floating, saving the 100 nA quiescent current of the USB transceiver.
Route the D+ and D- USB differential pair with 90 ohm differential impedance and matched trace lengths within 2 mm. Place the 15 kohm pull-up resistor on D+ close to the MCU and not at the connector. Keep the USB traces away from switching regulator inductors and clock signals to minimize radiated EMI. The 44-pin TQFP allows 0.4 mm pitch routing on a 4-layer PCB without via fan-out.
Do not connect the CTMU pins directly to high-impedance analog sources without a series isolation resistor; the CTMU current source can disturb sensitive analog measurements. When using the RTCC, apply an external 32.768 kHz crystal on SOSCO/SOSCI and add 22 pF load capacitors. For USB, ensure the VBUS sensing configuration in firmware matches the hardware - the USB stack needs VBUS detect logic to comply with USB 2.0 suspend/resume requirements.
Compliance Information
Automotive V-grade temperature qualification -40C to +105C per Microchip PIC32MX25x family datasheet. Not AEC-Q100 qualified; for AEC-Q100 safety applications use PIC32MX1xx Q-grade variants. RoHS and REACH compliant per Microchip product page DS60001168H.