PIC32MX270F512H-50I/MR - 32-bit MCU, 512KB Flash, 64-QFN | Microchip
MPN: PIC32MX270F512H-50I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.4 | $6.40 |
| 10 | $5.92 | $59.20 |
| 100 | $5.3 | $530.00 |
| 500 | $4.84 | $2,420.00 |
| 1,000 | $4.45 | $4,450.00 |
PIC32MX270F512H-50I/MR Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program and data memory, and a rich set of on-chip peripherals. The PIC32MX270 family extends Microchip's MIPS-based 32-bit MCU line, sitting between the lower-pin PIC32MX1xx and the larger PIC32MX5xx series. Within the power-management and embedded hierarchy, this part belongs to the 32-bit microcontroller family -> embedded processor -> semiconductor device category, and is commonly used as a system-on-chip replacement for discrete microcontroller + external memory designs.
Key features include 512 KB Flash program memory (512K x 8), 64 KB SRAM data memory, a USB 2.0 Full-Speed OTG controller, two I2S and four SPI/I2S modules for audio codec interfacing, Peripheral Pin Select (PPS) for flexible digital routing, a Parallel Master Port (PMP) with dual buffers, multiple UART/I2C/SPI channels, a 10-bit ADC with up to 1 Msps, and a Charge Time Measurement Unit (CTMU) for touch and capacitive sensing. The 64-pin QFN package provides a compact 9x9 mm footprint suitable for space-constrained designs.
The PIC32MX3/MX2 family uses the MIPS32 M4K core with hardware multiply/divide, 5-stage pipeline, and tightly-coupled prefetch cache, delivering 1.57 DMIPS/MHz. Integrated peripherals are mapped through a peripheral bus matrix and routed to physical pins via the PPS register-mapped mapper, giving designers flexible pin assignment without package variant swaps.
Typical applications include USB audio devices, human-machine interfaces (HMI) with LCD and PMP graphics, industrial control with capacitive touch keypads, IoT edge nodes, motor control peripherals, and embedded host controllers for sensors or storage. The USB OTG controller makes it well suited to device, host, or dual-role USB peripherals such as MIDI controllers and audio interfaces.
When designing with this MCU, plan for the PPS remapping carefully because several peripherals share a smaller set of physical pins; the datasheet "Peripheral Pin Select" table is the reference for licensing. For USB applications, an external 48 MHz crystal is required to clock the USB module precisely.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX270F512H-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 PIC32MX270F512H-50I/MR (same form factor and footprint) — differing in Package, Operating Temperature, SPI Modules, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX270F512H-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F512H-V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F256H-50I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F256H-50I/MR
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →PIC32MX230F256H-50I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F256H-50I/MR
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →PIC32MX270F512H-50I/MR Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K |
| Architecture | 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| DMIPS | 83 DMIPS |
| Program Flash Memory | 512 KB (512K x 8) |
| SRAM Data Memory | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| USB Controller | USB 2.0 Full-Speed OTG |
| I2S Modules | 2 |
| SPI Modules | 4 (SPI/I2S multiplexed) |
| PMP (Parallel Master Port) | Yes, dual read/write buffers |
| CTMU (Charge Time Measurement Unit) | Yes (for touch/capacitive sensing) |
| Peripheral Pin Select (PPS) | Yes |
| Package | 64-QFN (9x9 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant |
PIC32MX270F512H-50I/MR Pin Configuration
| Pin 1 | RP4 — Remappable peripheral pin |
| Pin 2 | RP3 — Remappable peripheral pin |
| Pin 3 | RP2 — Remappable peripheral pin |
| Pin 4 | RP1 — Remappable peripheral pin |
| Pin 5 | RP0 — Remappable peripheral pin |
| Pin 6 | VSS — Ground |
| Pin 7 | VDD — Power supply |
| Pin 8 | OSC1 — Crystal oscillator input |
| Pin 9 | OSC2 — Crystal oscillator output |
| Pin 10 | PGED1 — Programming data pin 1 |
| Pin 11 | PGEC1 — Programming clock pin 1 |
| Pin 12 | AN0 — Analog input 0 / RB0 |
| Pin 13 | AN1 — Analog input 1 / RB1 |
| Pin 14 | AN2 — Analog input 2 / RB2 |
| Pin 15 | AN3 — Analog input 3 / RB3 |
| Pin 16 | AN4 — Analog input 4 / RB4 |
| Pin 17 | AN5 — Analog input 5 / RB5 |
| Pin 18 | AN6 — Analog input 6 / RB6 |
| Pin 19 | AN7 — Analog input 7 / RB7 |
| Pin 20 | VSS — Ground |
| Pin 21 | VDD — Power supply |
| Pin 22 | AN8 — Analog input 8 / RB8 |
| Pin 23 | AN9 — Analog input 9 / RB9 |
| Pin 24 | AN10 — Analog input 10 / RB10 |
| Pin 25 | AN11 — Analog input 11 / RB11 |
| Pin 26 | AN12 — Analog input 12 / RB12 |
| Pin 27 | AN13 — Analog input 13 / RB13 |
| Pin 28 | AN14 — Analog input 14 / RB14 |
| Pin 29 | AN15 — Analog input 15 / RB15 |
| Pin 30 | VSS — Ground |
| Pin 31 | VDD — Power supply |
| Pin 32 | RD0 — I/O port D bit 0 / PMP data |
| Pin 33 | RD1 — I/O port D bit 1 / PMP data |
| Pin 34 | RD2 — I/O port D bit 2 / PMP data |
| Pin 35 | RD3 — I/O port D bit 3 / PMP data |
| Pin 36 | RD4 — I/O port D bit 4 / PMP data |
| Pin 37 | RD5 — I/O port D bit 5 / PMP data |
| Pin 38 | RD6 — I/O port D bit 6 / PMP data |
| Pin 39 | RD7 — I/O port D bit 7 / PMP data |
| Pin 40 | VSS — Ground |
| Pin 41 | VDD — Power supply |
| Pin 42 | RE0 — I/O port E bit 0 / PMP control |
| Pin 43 | RE1 — I/O port E bit 1 / PMP control |
| Pin 44 | RE2 — I/O port E bit 2 / PMP control |
| Pin 45 | RE3 — I/O port E bit 3 / PMP control |
| Pin 46 | RE4 — I/O port E bit 4 / PMP control |
| Pin 47 | RE5 — I/O port E bit 5 / PMP control |
| Pin 48 | RE6 — I/O port E bit 6 / PMP control |
| Pin 49 | RE7 — I/O port E bit 7 / PMP control |
| Pin 50 | VSS — Ground |
| Pin 51 | VDD — Power supply |
| Pin 52 | RF0 — I/O port F bit 0 |
| Pin 53 | RF1 — I/O port F bit 1 |
| Pin 54 | RF2 — I/O port F bit 2 |
| Pin 55 | RF3 — I/O port F bit 3 |
| Pin 56 | RF4 — I/O port F bit 4 |
| Pin 57 | RF5 — I/O port F bit 5 |
| Pin 58 | RF6 — I/O port F bit 6 |
| Pin 59 | RF7 — I/O port F bit 7 / USB D- |
| Pin 60 | RG6 — I/O port G bit 6 / USB D+ |
| Pin 61 | RG7 — I/O port G bit 7 |
| Pin 62 | RG8 — I/O port G bit 8 |
| Pin 63 | RG9 — I/O port G bit 9 |
| Pin 64 | PAD — Exposed thermal pad (must be soldered to VSS/GND plane) |
Typical Applications
PIC32MX270F512H-50I/MR is suitable for 6 applications: USB Audio Class Device, Human-Machine Interface (HMI) with LCD and PMP, Capacitive Touch Keypad with CTMU, Industrial Sensor Hub with USB Host, IoT Edge Controller with USB Diagnostics, Motor Control and Industrial Drive Interface.
USB Audio Class Device
The PIC32MX270F512H-50I/MR is ideal for USB Audio Class (UAC) device designs because the integrated USB 2.0 Full-Speed OTG controller handles USB protocol natively, while the two I2S modules accept audio data streams directly from external codecs. The 512 KB Flash accommodates the USB stack plus UAC driver, and the 64 KB SRAM provides ample buffer space for USB endpoint RAM and audio sample buffering. Place the MCU between the USB host (PC or tablet) and the audio DAC, with the I2S module clocking the DAC and the USB OTG module handling enumeration and isochronous transfers. The 50 MHz MIPS32 M4K core delivers 83 DMIPS, sufficient to run sample rate conversion without audio dropouts.
Recommended
Human-Machine Interface (HMI) with LCD and PMP
The PIC32MX270F512H-50I/MR is well suited to small-graphic HMI panels because of its Parallel Master Port (PMP) with dual read/write buffers and 50 MHz CPU throughput. The PMP module interfaces directly to graphical LCD controllers and TFT displays, while the dual buffers prevent tearing during partial frame updates. The 512 KB Flash stores the graphics library, fonts, and UI assets, and the 64 KB SRAM provides a framebuffer and UI variables. The peripheral pin select (PPS) feature allows the design engineer to remap PMP data lines to convenient pins, simplifying PCB routing on the 64-QFN package. Common HMI uses include appliance control panels, medical user interfaces, and industrial operator terminals.
Recommended
Capacitive Touch Keypad with CTMU
The PIC32MX270F512H-50I/MR supports capacitive touch sensing through its integrated Charge Time Measurement Unit (CTMU), enabling up to several tens of touch buttons without an external touch controller. The CTMU charges and times the discharge of each touch pad, providing robust noise-immune touch sensing. The 50 MHz MIPS32 core runs touch-sensing firmware plus a USB HID stack for USB-touch keypad applications, while 64 KB SRAM holds the touch state machine. Pair the MCU with a 64-QFN footprint PCB containing a touch sensor pattern; the Peripheral Pin Select (PPS) feature reassigns the CTMU channels to any available GPIO, simplifying the keypad layout.
Recommended
Industrial Sensor Hub with USB Host
The PIC32MX270F512H-50I/MR works as an industrial sensor hub because it supports USB Host mode via the integrated OTG controller, allowing it to read USB peripherals such as memory sticks, USB-to-UART bridges, or USB sensors. The 50 MHz MIPS32 M4K core runs an RTOS or scheduler, while 512 KB Flash stores USB host class drivers plus industrial protocol stacks (Modbus, CAN, RS-485). The CTMU supports capacitive proximity sensing for industrial operator panels. Common uses include data loggers, factory-floor USB scanners, and USB-to-CAN gateways. The -40 to +85C industrial temperature grade supports factory-floor deployment without thermal concerns.
Recommended
IoT Edge Controller with USB Diagnostics
The PIC32MX270F512H-50I/MR serves as an edge device bridging USB diagnostics to host channels and local sensors, ideal for edge networking and IoT node design. The 50 MHz MIPS32 M4K core runs networking stacks plus USB CDC for diagnostic log output. The 512 KB Flash supports TLS or lightweight IP stack plus USB class driver, and 64 KB RAM holds sensor buffers and CDC buffers. The Peripheral Pin Select (PPS) allows flexible PCB routing. Common uses include USB-connected IoT bridges, USB-MQTT firmware for wireless modules, and USB serial adapters for industrial sensors.
Recommended
Motor Control and Industrial Drive Interface
The PIC32MX270F512H-50I/MR is suitable for low-aux motor drive interface applications because its 50 MHz MIPS32 M4K core provides deterministic control loop timing for PWM generation, while the multiple UART/I2C/SPI channels handle drive parameter communication. The PMP module can interface to industrial display panels, and the CTMU supports capacitive touch buttons on the operator panel. The 512 KB Flash accommodates motor control libraries plus USB diagnostics. Common uses include small motors for appliances, pumps, fans, and industrial automation controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX270F512H-50I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX270F512H-I/MR | PIC32MX270F512H-V/MR | PIC32MX270F256H-50I/MR | PIC32MX250F256H-50I/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (MR) | 64-QFN (MR) - same | 64-QFN (MR) - same | 64-QFN (MR) - same | 64-QFN (MR) - 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 | 50 MHz | 40 MHz | 50 MHz | 50 MHz | 50 MHz |
| Program Flash | 512 KB | 512 KB | 512 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 32 KB | 32 KB |
| USB OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | No USB |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +105C (extended) | -40C to +85C | -40C to +85C |
| 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 |
Key Differentiators
- Highest-density flash variant of the PIC32MX270 family in 64-QFN (vs PIC32MX270F256H-50I/MR)
- Industrial temperature grade with USB OTG retained (vs PIC32MX250F256H-50I/MR)
- 50 MHz speed grade for high-performance USB and audio applications (vs PIC32MX270F512H-I/MR)
Design Notes
Estimated: at 3.3 V VDD and active USB + CPU at 50 MHz, the PIC32MX270F512H-50I/MR typical active current is approximately 30-60 mA, depending on peripheral activation. Add 10-20 mA for USB suspend/resume. Place a 100 nF decoupling capacitor as close as possible to each VDD pin (there are typically 5-6 VDD pins on the 64-QFN). Add a 10 uF bulk capacitor near the package. A ferrite bead is optional for noisy environments.
Estimated: the 64-QFN package has an exposed thermal pad (pin 64) that must be soldered to a continuous ground plane of at least 8 mm x 8 mm to meet the datasheet's thermal resistance (theta_JA approximately 28 C/W with proper pad). Connect the thermal pad to VSS through multiple thermal vias (at least 9 vias in a 3x3 array, 0.3 mm drill). Failure to solder the pad will result in elevated junction temperature and degraded reliability.
USB applications require a 48 MHz precise clock source - the PIC32MX270F512H-50I/MR's USB module cannot derive its clock from the 50 MHz system oscillator directly. Either use a 48 MHz crystal/oscillator on the USB module's clock input or configure the system PLL to provide 48 MHz to the USB. Skipping this step is the most frequent reason USB is difficult to enumerate on first prototypes.
For USB applications, the D+ and D- lines (RG7/RG6 or similar) must be routed as a 90 ohm differential pair with no stubs, no vias if possible, and matched length within 150 mil. Place the USB connector's ESD protection diode within 4 mm of the connector. Common-mode choke and ferrite bead are optional but recommended for EMI-sensitive applications.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 qualification not applicable for general-purpose MCU; choose automotive-grade PIC32 variants if required.
