PIC32MX274F256DT-V/PT - 72MHz 32-bit MCU, 256KB Flash, USB | Microchip
MPN: PIC32MX274F256DT-V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.32 | $2.32 |
| 10 | $2.16 | $21.60 |
| 100 | $1.95 | $195.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.62 | $1,620.00 |
PIC32MX274F256DT-V/PT Overview
A 32-bit microcontroller is a programmable processor built around a 32-bit datapath and register file, enabling efficient handling of larger data words, complex math, and richer peripheral sets than 8- or 16-bit MCUs. The PIC32MX family extends the PIC legacy into the MIPS M4K architecture, combining Microchip's MPLAB ecosystem with deterministic interrupts and a rich peripheral mix. Within the system hierarchy, the PIC32MX274F256D sits in the MCU -> 32-bit MCU -> connected MCU category, targeted at USB-enabled consumer, industrial, and automotive body applications.
Key features of this part include USB 2.0 Full-Speed with on-chip transceiver, 10-bit ADC up to 1.1 Msps, up to 5 UART/SPI/I2C peripherals, and the eXtreme Low Power (XLP) sleep modes that drop quiescent current into the microamp range. The 256 KB Flash holds up to 268 KB including a 12 KB boot Flash, while 64 KB SRAM supports buffering for USB, graphics, and audio workloads. With 34 usable I/O and CTMU touch support, designers can build capacitive touch user interfaces without an external touch controller.
Architecturally, the PIC32MX274F256DT-V/PT pairs the M4K core with a 5-stage pipeline, hardware multiply/divide, and a dedicated peripheral bus running from the same 72 MHz system clock. The CTMU provides a constant current source for capacitive sensing and precise time-of-flight measurement, while the RTCC keeps accurate wall-clock time in deep sleep.
Typical applications include USB HID / CDC / MSD devices, capacitive touch keypads, automotive body controllers (V variant), low-cost audio playback, and graphics-driven HMI panels. The wide operating voltage (2.3V-3.6V) and industrial temperature range make it equally suited to battery-powered IoT sensors and factory automation nodes.
When designing with this part, ensure that VDDCORE decoupling and the 8 MHz internal oscillator configuration match your MPLAB Harmony project settings. The V (automotive) suffix indicates AEC-Q100 qualification, so validate EMI/ESD margins against ISO 7637 or IEC 61000-4-2 if targeting 12V automotive rails.
This page combines distributor pricing, qualified drop-in alternatives, and practical design notes not found on a single manufacturer page.
Drop-in alternatives for PIC32MX274F256DT-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 PIC32MX274F256DT-V/PT (same form factor and footprint) — differing in ADC, Core Architecture, Package, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX274F256DT-I/PT
✅ Drop-In✓ In Stock
$3.29 / Unit
View Datasheet →PIC32MX270F256DT-V/PT
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →PIC32MX270F256DT-I/PT
✅ Drop-In✓ In Stock
$3.92 / Unit
View Datasheet →PIC32MX274F256D-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX254F128DT-V/PT
✅ Drop-In✓ In Stock
$2.96 / Unit
View Datasheet →PIC32MX274F256DT-V/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Frequency | 72 MHz |
| Program Flash Memory | 256 KB (256K x 8) plus 12 KB boot Flash |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| I/O Pins | 34 |
| USB | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver |
| ADC | 10-bit, up to 1.1 Msps |
| Analog Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit) |
| RTCC | Yes (Real-Time Clock Calendar) |
| Communication Peripherals | UART, SPI, I2C |
| Operating Temperature Range | -40C to +105C (V automotive grade) |
| Package | 44-pin TQFP (PT) 10x10 mm |
| AEC-Q100 | Qualified (V suffix) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes / Compliant |
PIC32MX274F256DT-V/PT 44-pin tqfp (pt) 10x10 mm Pin Configuration Guide
Pin configuration for PIC32MX274F256DT-V/PT (44-pin tqfp (pt) 10x10 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC32MX274F256DT-V/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX274F256DT-V/PT is suitable for 7 applications: USB HID / CDC / MSD Device, Automotive Body Control Module, Capacitive Touch Keypad, Low-Cost Audio Playback Device, Industrial Sensor Node, Graphics HMI Panel, USB Charging Port Controller.
USB HID / CDC / MSD Device
The PIC32MX274F256DT-V/PT integrates a Full-Speed USB 2.0 device controller with on-chip transceiver, eliminating the need for an external USB PHY. With 256 KB Flash and 64 KB SRAM it comfortably hosts composite USB stacks (HID + CDC + MSD), while the 72 MHz M4K core handles enumeration, interrupt handling, and protocol processing without CPU bottlenecks. The automotive -40C to +105C grade makes it suitable for ruggedized USB peripherals and in-cabin infotainment accessories.
Recommended
Automotive Body Control Module
The V suffix AEC-Q100 qualification plus -40C to +105C operation makes the PIC32MX274F256DT-V/PT a strong fit for body controllers managing door locks, lighting, wipers, and HVAC actuators. The 3 analog comparators and CTMU support direct sensor signal conditioning, while the RTCC keeps wall-clock time during deep-sleep parking modes. With 34 I/O pins it can drive multiple LIN/CAN-style actuator channels and switch inputs without an I/O expander.
Recommended
Capacitive Touch Keypad
The on-chip CTMU (Charge Time Measurement Unit) delivers constant-current charge timing for capacitive touch electrodes, allowing the PIC32MX274F256DT-V/PT to scan 10-20 touch keys without an external touch controller. The 64 KB SRAM buffers scan results, while the 72 MHz core runs touch firmware and USB HID reporting concurrently. AEC-Q100 qualification supports automotive center-stack touch panels and steering-wheel switches.
Recommended
Low-Cost Audio Playback Device
The PIC32MX274F256DT-V/PT's audio I/O library and 72 MHz processing support compressed audio decode (WAV, ADPCM, simple MP3) with sample-rate mixing and PWM or external DAC output. The 256 KB Flash stores 30-60 seconds of 16 kHz ADPCM audio, while 64 KB SRAM buffers streaming samples for click-free playback. Automotive temperature grade fits car-audio accessories such as reverse-warning chimes and door-chime modules.
Recommended
Industrial Sensor Node
With XLP low-power sleep modes drawing microamp-level current and an RTCC that maintains time during deep sleep, the PIC32MX274F256DT-V/PT is suited to battery-powered industrial sensor nodes (vibration, temperature, pressure). The 10-bit ADC samples analog sensors at up to 1.1 Msps, while the CTMU enables precise time-of-flight and capacitance measurements. The wide 2.3V-3.6V supply range works with 3.3V LDO rails and single-cell Li-ion chemistries.
Recommended
Graphics HMI Panel
The PIC32MX274F256DT-V/PT supports Microchip's graphics libraries (MLA / Harmony) for driving small TFT or OLED panels over SPI or parallel 8-bit interfaces at modest frame rates. 64 KB SRAM holds a small framebuffer, and the 72 MHz core has enough headroom to render buttons, gauges, and animated icons. The automotive V grade suits industrial machinery HMI and in-cabin cluster accessories operating up to +105C.
Recommended
USB Charging Port Controller
USB Battery Charging Specification (BC1.2) detection and port control logic fits naturally in the PIC32MX274F256DT-V/PT's USB-capable architecture. With 34 I/O the MCU monitors VBUS, controls load switches, and reports status via USB or LIN. The AEC-Q100 V grade supports in-vehicle USB charger modules that must operate from -40C cold-crank to +105C engine-bay-adjacent environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX274F256DT-V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX274F256DT-I/PT | PIC32MX270F256DT-V/PT | PIC32MX270F256DT-I/PT | PIC32MX274F256D-V/PT | PIC32MX254F128DT-V/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Maximum CPU Frequency | 72 MHz | 72 MHz | 40 MHz at 44-pin | 40 MHz at 44-pin | 72 MHz | 72 MHz |
| Program Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB (-50%) |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) |
| Temperature Grade / AEC-Q100 | Automotive -40C to +105C (V), AEC-Q100 | Industrial -40C to +85C (I), not AEC-Q100 | Automotive -40C to +105C (V), AEC-Q100 | Industrial -40C to +85C (I), not AEC-Q100 | Automotive -40C to +105C (V), AEC-Q100 | Automotive -40C to +105C (V), AEC-Q100 |
| USB 2.0 Full-Speed | Yes (on-chip transceiver) | Yes | Yes | Yes | Yes | Yes |
| CTMU / Capacitive Touch | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Automotive AEC-Q100 qualification with -40C to +105C operation (vs PIC32MX274F256DT-I/PT)
- Highest 72 MHz CPU performance in the PIC32MX2xx family (vs PIC32MX270F256DT-V/PT)
- Doubled memory vs PIC32MX254 with same pinout (vs PIC32MX254F128DT-V/PT)
Design Notes
Estimated: At 72 MHz CPU and full peripheral activity (USB + ADC + UART), the PIC32MX274F256DT-V/PT core current is approximately 50-70 mA from VDDCORE (1.8V-2.5V typical). Add 10-15 mA for USB Full-Speed transceiver activity on VDDIO. For USB bus-powered designs, place a 10 uF + 0.1 uF ceramic bulk on VDDIO and a 4.7 uF + 0.1 uF on VDDCORE within 5 mm of the pins, with a ferrite bead separating the two rails to suppress USB-edge coupling.
Estimated: At continuous 72 MHz with USB active, total device power dissipation is roughly 150-200 mW. The 44-pin TQFP (PT) package has a theta_JA of approximately 50-60 C/W on a 4-layer JEDEC test board, producing a 10-12 C junction rise above ambient. For automotive designs targeting +105C ambient, derate the peripheral clock or enable XLP sleep modes to keep Tj below the +125C max. A small copper pour (>=1 square inch) under the exposed pad is recommended.
The 44-pin TQFP package requires a 10x10 mm land pattern with 0.8 mm pitch. Route the differential USB DP/DN pair as a 90-ohm impedance-matched pair, length-matched to within 2 mm, and keep them away from switching rails. Place the 12 MHz or 48 MHz external crystal within 5 mm of the OSCI/OSCO pins with short, symmetric traces and a guard ground pour. Ensure that the VDDCORE core supply decoupling is the closest capacitor to the pin.
Common pitfalls: (1) Forgetting to configure the POSC_SEL bits for the chosen external oscillator load capacitors - this causes USB jitter and enumeration failures. (2) Enabling the on-chip USB pull-up resistor while also using an external 1.5k pull-up on D+ - doubles the pull-up strength and prevents host enumeration. (3) Using the boot Flash region for application code without configuring the BOOTSWAP or IVSEL bits - the device boots into the empty boot Flash and appears blank. Always validate your HEX file against the device ID in MPLAB IPE before mass production.
Compliance Information
V suffix indicates AEC-Q100 automotive qualification per Microchip product page. Lead-free and RoHS/REACH compliant per Microchip material declaration.