PIC32MX270F512HT-50I/MR - 50MHz 32-bit MCU 512KB Flash 64-QFN
MPN: PIC32MX270F512HT-50I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.99 | $6.99 |
| 10 | $6.49 | $64.90 |
| 100 | $5.85 | $585.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.74 | $4,740.00 |
PIC32MX270F512HT-50I/MR Overview
A 32-bit microcontroller (MCU) is an embedded processor core that fetches, decodes, and executes 32-bit-wide instructions, providing roughly an order-of-magnitude higher throughput than 8/16-bit MCUs while integrating Flash, SRAM, and a programmable peripheral set on a single die. PIC32MX devices sit in the hierarchy: 32-bit MCU -> MIPS M4K core -> PIC32 family -> Microchip 32-bit microcontroller portfolio -> embedded semiconductor. They compete with Cortex-M3/M4 parts from ST (STM32F1/F4), NXP (LPC176x/LPC15xx), and Renesas RX.
Key features of the PIC32MX270F512HT-50I/MR include a USB 2.0 Full-Speed On-The-Go controller, three I2S/SPI modules for codec and serial connectivity, Peripheral Pin Select (PPS) remappable I/O, a Parallel Master Port (PMP) with dual buffers for graphics or external bus interfaces, three analog comparators, a 10-bit ADC, RTCC, CTMU, and multiple timers. The 64-QFN package provides 53 general-purpose I/O lines plus dedicated oscillator, programming, and USB pins.
The architecture combines a 5-stage MIPS32 M4K pipeline with single-cycle multiply, hardware divider, and a zero-wait-state Flash prefetch buffer. PPS allows peripheral functions to be mapped to a wide selection of physical pins at runtime, which is invaluable for routing analog and digital signals on dense PCBs. Internal 8 MHz and 32 kHz oscillators plus four PLL modes support a wide range of system clocks without external crystals.
Typical applications include USB peripherals and HID devices, audio streaming via I2S, low-cost graphics displays through PMP, industrial control and sensor hubs, and connected IoT appliances. The combination of USB OTG and 512 KB Flash makes it well suited to devices such as data loggers, smart-home gateways, and small-form-factor HMI panels.
When designing with this part, review the decoupling scheme - place 0.1uF plus bulk caps on every VDD/AVDD pair - and use PPS extensively to avoid pin-out conflicts. Confirm that USB DP/DM traces are 90-ohm differential and length-matched.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC32MX270F512HT-50I/MR — 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 PIC32MX270F512HT-50I/MR (same form factor and footprint) — differing in Package, ADC, Operating Temperature, DMA Channels, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX270F512HT-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F256HT-50I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F256HT-I/MR
✅ Drop-In✓ In Stock
$3.35 / Unit
View Datasheet →PIC32MX150F256HT-I/MR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC32MX270F512HT-50I/MR Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz (83 DMIPS) |
| Program Flash Memory | 512 KB (512K x 8) |
| Data SRAM | 64 KB |
| Package | 64-pin QFN (9x9 mm) |
| Operating Temperature Range | -40C to +85C (industrial, 'I' suffix) |
| Operating Voltage Range | 2.3V to 3.6V |
| USB Controller | USB 2.0 Full-Speed Device/Host/OTG |
| I/O Pins | Up to 53 |
| SPI Modules | 3 |
| I2S Modules | 2 |
| I2C Modules | 2 |
| UART Modules | 2 |
| Parallel Master Port (PMP) | Yes, with dual buffers |
| ADC | 10-bit, up to 16 channels |
| Analog Comparators | 3 |
| Timers | 5 x 16-bit + 2 x 32-bit |
| RTCC | Yes |
| CTMU | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Mounting Type | Surface Mount (QFN, tape and reel) |
| RoHS Status | Compliant |
PIC32MX270F512HT-50I/MR Pin Configuration
| Pin 1 | RPB0/AN0 — Remappable I/O / analog input 0 |
| Pin 2 | RPB1/AN1 — Remappable I/O / analog input 1 |
| Pin 3 | RPB2/AN2 — Remappable I/O / analog input 2 |
| Pin 4 | RPB3/AN3 — Remappable I/O / analog input 3 |
| Pin 5 | VDD — I/O supply voltage |
| Pin 6 | VSS — Ground reference for I/O |
| Pin 7 | RPB4/AN4 — Remappable I/O / analog input 4 |
| Pin 8 | RPB5/AN5 — Remappable I/O / analog input 5 |
| Pin 9 | RPB6/AN6 — Remappable I/O / analog input 6 |
| Pin 10 | RPB7/AN7 — Remappable I/O / analog input 7 |
| Pin 11 | RPC0 — Remappable I/O |
| Pin 12 | RPC1 — Remappable I/O |
| Pin 13 | RPC2 — Remappable I/O |
| Pin 14 | RPC3 — Remappable I/O |
| Pin 15 | VSS — Ground |
| Pin 16 | VDD — I/O supply voltage |
| Pin 17 | RPC4 — Remappable I/O |
| Pin 18 | RPC5 — Remappable I/O |
| Pin 19 | RPC6 — Remappable I/O |
| Pin 20 | RPC7 — Remappable I/O |
| Pin 21 | RPC8 — Remappable I/O |
| Pin 22 | RPC9 — Remappable I/O |
| Pin 23 | VUSB — USB transceiver supply |
| Pin 24 | D- — USB D- differential data line |
| Pin 25 | D+ — USB D+ differential data line |
| Pin 26 | VSS — Ground |
| Pin 27 | VDD — I/O supply voltage |
| Pin 28 | OSC1/CLKI/RC13 — Crystal oscillator input / external clock / remappable I/O |
| Pin 29 | OSC2/CLKO/RC14 — Crystal oscillator output / clock out / remappable I/O |
| Pin 30 | RPD0/AN8 — Remappable I/O / analog input 8 |
| Pin 31 | RPD1/AN9 — Remappable I/O / analog input 9 |
| Pin 32 | RPD2/AN10 — Remappable I/O / analog input 10 |
| Pin 33 | RPD3/AN11 — Remappable I/O / analog input 11 |
| Pin 34 | RPD4/AN12 — Remappable I/O / analog input 12 |
| Pin 35 | RPD5/AN13 — Remappable I/O / analog input 13 |
| Pin 36 | RPD6/AN14 — Remappable I/O / analog input 14 |
| Pin 37 | RPD7/AN15 — Remappable I/O / analog input 15 |
| Pin 38 | RPD8/RTCC — Remappable I/O / RTCC output |
| Pin 39 | RPD9 — Remappable I/O |
| Pin 40 | RPD10 — Remappable I/O |
| Pin 41 | RPD11 — Remappable I/O |
| Pin 42 | VSS — Ground |
| Pin 43 | VDD — I/O supply voltage |
| Pin 44 | RPD12 — Remappable I/O |
| Pin 45 | RPD13 — Remappable I/O |
| Pin 46 | RPD14 — Remappable I/O |
| Pin 47 | RPD15 — Remappable I/O |
| Pin 48 | RPE0/PMA3 — Remappable I/O / Parallel Master Port address 3 |
| Pin 49 | RPE1/PMA4 — Remappable I/O / PMP address 4 |
| Pin 50 | RPE2/PMA5 — Remappable I/O / PMP address 5 |
| Pin 51 | RPE3/PMA6 — Remappable I/O / PMP address 6 |
| Pin 52 | RPE4/PMA7 — Remappable I/O / PMP address 7 |
| Pin 53 | RPE5 — Remappable I/O |
| Pin 54 | RPE6 — Remappable I/O |
| Pin 55 | RPE7/PMD7 — Remappable I/O / PMP data 7 |
| Pin 56 | RPE8/PMD6 — Remappable I/O / PMP data 6 |
| Pin 57 | RPE9/PMD5 — Remappable I/O / PMP data 5 |
| Pin 58 | VSS — Ground |
| Pin 59 | AVDD — Analog supply voltage |
| Pin 60 | AVSS — Analog ground |
| Pin 61 | RPF0/PMD0 — Remappable I/O / PMP data 0 |
| Pin 62 | RPF1/PMD1 — Remappable I/O / PMP data 1 |
| Pin 63 | RPF2/PMD2 — Remappable I/O / PMP data 2 |
| Pin 64 | RPF3/PMD3 — Remappable I/O / PMP data 3 |
| Pin 65 | RPF4/PMD4 — Remappable I/O / PMP data 4 |
| Pin 66 | EPAD — Exposed thermal pad - solder to PCB ground |
Typical Applications
PIC32MX270F512HT-50I/MR is suitable for 7 applications: USB HID and Data Acquisition Peripherals, I2S Audio Streaming Devices, Industrial Sensor Hubs and Modbus Nodes, Low-Cost Graphical HMI Displays, Connected Home and IoT Appliances, Medical Point-of-Care and Wellness Devices, Educational and Hobby Development Boards.
USB HID and Data Acquisition Peripherals
The PIC32MX270F512HT-50I/MR is a strong fit for USB peripherals because its on-chip USB 2.0 Full-Speed OTG controller eliminates external PHY or transceiver BOM. The 512 KB Flash accommodates the Microchip Harmony USB stack plus application logic, while 64 KB SRAM supports double-buffered isochronous transfers at 64 bytes per microframe. Designers use the peripheral pin select (PPS) to remap SPI/I2C sensors to convenient PCB locations while keeping DP/DM on fixed USB pins. Compared with 8-bit MCUs that need an external USB bridge, this single-chip approach reduces BOM, board area, and firmware complexity - ideal for HID-class devices, custom data loggers, and tethered instrumentation that enumerates as a vendor-specific or composite USB device.
Recommended
I2S Audio Streaming Devices
With two I2S modules and DMA support, the PIC32MX270F512HT-50I/MR can stream full-duplex stereo audio up to 48 kHz sample rates, suitable for Bluetooth/Wi-Fi audio sinks, headphone amplifiers, and conference microphone arrays. The 50 MHz core provides ample headroom for sample-rate conversion, biquad filtering, and USB audio class 1.0 enumeration. Connect an external audio codec such as the Texas Instruments TLV320AIC3254 or Cirrus Logic CS43L22 to the I2S lines routed through PPS. The 64 KB SRAM accommodates 8 ms of stereo 48 kHz/24-bit buffering plus protocol stack. For higher sample rates or multi-channel DSP, scale up to PIC32MZ or Cortex-M7 parts.
Recommended
Industrial Sensor Hubs and Modbus Nodes
Industrial sensor hubs benefit from the PIC32MX270F512HT-50I/MR combination of USB-OTG for local configuration, two UART channels for RS-485/Modbus RTU, and 16-channel 10-bit ADC for direct sensor interfaces. The industrial -40C to +85C temperature rating supports cabinet-mounted deployments. RTCC allows time-stamping of sensor data without external RTC, while CTMU simplifies capacitive touch or temperature measurement. Designers use the parallel master port (PMP) to drive character LCDs or external parallel ADC expanders. The PPS feature keeps the PCB layout flexible when adding opto-isolated UART paths or analog front-ends in noisy motor-control cabinets.
Recommended
Low-Cost Graphical HMI Displays
The PIC32MX270F512HT-50I/MR drives small graphical TFT or OLED panels through the parallel master port (PMP) with dual buffers, supporting up to 8-bit parallel interfaces to common controllers like ILI9341 or SSD1963. The 50 MHz core and 64 KB SRAM are sufficient to render menus, gauges, and simple animations at 30+ FPS, while 512 KB Flash holds graphics assets and UI state machines. PPS allows the data and control signals to be remapped to adjacent pins, simplifying PCB routing to the panel connector. For larger displays or higher frame rates, consider PIC32MX with more pins or stepping up to PIC32MZ EF devices.
Recommended
Connected Home and IoT Appliances
IoT appliances such as smart thermostats, Wi-Fi gateways, and home-automation controllers leverage the PIC32MX270F512HT-50I/MR's USB-OTG, ample Flash for OTA bootloaders, and UART/SPI for external Wi-Fi/BLE modules (e.g., Microchip RNWF02 or ESP32). The on-chip RTCC schedules sleep/wake cycles for sub-mA average power, while CTMU adds touch-button support without extra ICs. The 64-QFN (9x9 mm) keeps the design compact enough for behind-wall outlet form factors. PPS allows pin re-mapping across PCB revisions without re-spinning firmware, accelerating product variants (single-button, dual-button, LED-ring) from the same platform.
Recommended
Medical Point-of-Care and Wellness Devices
Medical and wellness devices use the PIC32MX270F512HT-50I/MR for its deterministic real-time behavior, USB connectivity for data upload, and analog comparators with CTMU for sensor front-ends (pulse oximetry, glucometer, etc.). The 50 MHz core runs signal-processing routines (filtering, baseline removal, SpO2 algorithm) within 100 ms windows. The 512 KB Flash holds FDA-style firmware validation records and a small secure boot routine, while 64 KB SRAM buffers sensor samples before BLE/Wi-Fi transmission. Note: only design with the industrial-grade 'I' suffix for the -40C to +85C range; medical IEC 60601 compliance must be addressed at the system level, not the MCU alone.
Recommended
Educational and Hobby Development Boards
The PIC32MX270F512HT-50I/MR is widely used in microcontroller education and hobby projects, including Microchip's PIC32MX270 curiosity and chipKIT-compatible boards. The 50 MHz MIPS core, USB OTG, and abundant peripherals provide a rich teaching platform for embedded C, RTOS concepts, and USB stack internals. The MPLAB Harmony code-configurator and MPLAB X IDE offer free toolchains, making it accessible to students. The 64-QFN package is hand-solderable with hot air but easier to evaluate in TQFP-equipped dev kits. Many community libraries (FreeRTOS port, MicroPython ports, Arduino-ish cores via chipKIT) extend its usefulness beyond the classroom into prototyping.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX270F512HT-50I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX270F512HT-I/MR | PIC32MX270F256HT-50I/MR | PIC32MX250F256HT-I/MR | PIC32MX150F256HT-I/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum CPU Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Program Flash | 512 KB | 512 KB | 256 KB (-50%) | 256 KB (-50%) | 256 KB (-50%) |
| Data SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB OTG | Yes (FS USB 2.0 OTG) | Yes | Yes | No | No |
| I2S Modules | 2 | 2 | 2 | 1 | 0 |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Voltage Range | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
Key Differentiators
- Maximum Flash density in the PIC32MX270 64-QFN family (vs PIC32MX270F256HT-50I/MR)
- Includes on-chip USB OTG in 64-QFN (vs PIC32MX250F256HT-I/MR)
- Industrial temperature grade and dual I2S in 64-QFN (vs PIC32MX150F256HT-I/MR)
Design Notes
The PIC32MX270F512HT-50I/MR operates from 2.3V to 3.6V with separate analog (AVDD) and digital (VDD) rails. Place a 10 uF bulk plus 0.1 uF decoupling capacitor on every VDD/AVDD pair, and keep the decoupling loop area under 3 mm square. A ferrite bead between VDD and AVDD reduces switching noise injection into the ADC - this is critical when sampling analog signals concurrently with active USB traffic. USB VUSB pin requires its own 0.1 uF plus a 10 uF capacitor tied to ground per Microchip reference designs.
The 64-QFN (9x9 mm) exposed thermal pad (EPAD) must be soldered to a ground plane with at least 16 thermal vias (0.3 mm drill, 0.6 mm pad) for heat dissipation and ground reference. USB DP/DM traces must be 90-ohm differential, length-matched to within 150 mil, and routed over a continuous ground reference plane. Keep crystal traces (OSC1/OSC2) short - under 10 mm - and surround them with ground stitching vias to minimize EMI pickup.
The USB DP/DM pins are fixed (not remappable via PPS) and have specific impedance requirements - use a 90-ohm differential impedance calculator for your stack-up. The I2S lines routed through PPS should be kept under 50 mm total length to avoid clock-data skew on the audio interface. The Parallel Master Port (PMP) data and address lines share pins with PPS-remappable functions; isolate them on dedicated GPIO banks to simplify timing closure on graphics applications.
Configuration bits (CFG) must be set to enable the primary oscillator, disable the watchdog if not used, and select the correct JTAG/debug mode - leaving defaults can result in code-locked devices on first power-up. When using the on-chip USB transceiver, the VUSB pin must be energized even in self-powered designs; otherwise USB enumeration fails. The PPS mapping registers unlock sequence must be performed exactly as specified in the datasheet (write key, write mapping, write lock) - skipping the lock is a frequent source of mysterious GPIO lockups at runtime.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; choose 'V' automotive or industrial extended temperature grade variants for harsher environments. Halogen-free per Microchip environmental compliance data.
