PIC32MX270F512LT-I/PT - 512KB Flash 64KB RAM 40MHz 32-bit MCU | Microchip
MPN: PIC32MX270F512LT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.25 | $62.50 |
| 100 | $5.55 | $555.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.42 | $4,420.00 |
PIC32MX270F512LT-I/PT Overview
A 32-bit microcontroller is a microprocessor that processes instructions and data in 32-bit wide paths, delivering higher throughput and richer address spaces than legacy 8/16-bit MCUs. Within the PIC32MX family, the M4K core combines Harvard architecture with a 5-stage pipeline and hardware multiply/divide. The PIC32MX270 sits in the mid-density tier of PIC32MX, sitting between low-pin MX1xx/MX2xx and higher-density MX3xx/MX4xx variants, and it targets human-machine interface (HMI), audio, USB, and CAN bridging applications where on-chip Flash and USB are valued over RTOS-class peripherals. Its place in the broader taxonomy: 32-bit MCU -> microcontroller -> embedded processor -> semiconductor.
Key feature highlights include: 512 KB Flash (512K x 8) supporting self-programming and EEPROM emulation, 64 KB SRAM, USB 2.0 Full-Speed OTG with on-chip transceiver, two I2S modules plus four SPI/I2S capable serial interfaces for codec connectivity, Parallel Master Port (PMP) for graphics or external memory, and CTMU for capacitive touch sensing. The part is rated for -40C to +85C industrial operation with 2.3 V to 3.6 V single-supply input.
Technical depth: the MIPS M4K core uses a 5-stage pipeline with hardware multiply/divide and a 32-bit instruction set with 32 general-purpose registers, achieving 1.56 DMIPS/MHz. The 10-bit ADC offers up to 1 Msps with 28 input channels multiplexed through PPS. The on-chip USB PHY eliminates external transceivers; software stacks include Microchip's MLA USB framework. PPS lets designers remap most digital functions to any I/O pin, simplifying PCB layout and BOM.
Typical applications: USB peripherals and HID devices, capacitive touch user interfaces (CTMU), audio streaming with I2S codecs, CAN-USB bridges for industrial networking, and low-cost HMI panels driven by PMP. The part's balance of USB, CTMU, and I2S makes it a common choice for connected consumer and IoT products.
Design consideration: when migrating between PIC32MX270F512L (64-pin/100-pin) and PIC32MX270F256B/C/D variants, verify ADC channel count and PPS mapping carefully because pin counts change and not all peripheral instances are present in lower-pin variants.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, and includes cross-references to same-package and pin-compatible Microchip PIC32MX siblings for inventory and lifecycle risk mitigation.
Drop-in alternatives for PIC32MX270F512LT-I/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 PIC32MX270F512LT-I/PT (same form factor and footprint) — differing in ADC, Package, USB, Parallel Master Port (PMP), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX270F512L-50I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC32MX270F512HT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F512HT-50I/PT
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC32MX270F512LT-50I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC32MX170F512LT-I/PT
✅ Drop-In✓ In Stock
$6.4 / Unit
View Datasheet →PIC32MX270F512LT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Speed | 40 MHz (40 MIPS) |
| DMIPS Performance | Up to 83 DMIPS |
| Program Flash Memory | 512 KB (512K x 8) |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Package | 100-pin TQFP (12x12 mm) |
| GPIO Count | Up to 81 |
| ADC | 10-bit, up to 1 Msps |
| USB Module | USB 2.0 Full-Speed OTG with on-chip transceiver |
| CAN | Yes (CAN 2.0B active) |
| I2S Modules | 2 |
| SPI Modules | 4 (configurable as I2S) |
| UART Modules | 4 |
| I2C Modules | 2 |
| Analog Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit) |
| RTCC | Yes (Real-Time Clock Calendar) |
| Parallel Master Port (PMP) | Yes |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Peripheral Pin Select (PPS) | Yes |
PIC32MX270F512LT-I/PT 100-pin tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for PIC32MX270F512LT-I/PT (100-pin tqfp (12x12 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 PIC32MX270F512LT-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX270F512LT-I/PT is suitable for 6 applications: USB HID Peripheral / HID Device, Capacitive Touch User Interface (CTMU), Audio Streaming with I2S Codec, CAN-USB Industrial Bridge, Low-Cost HMI Panel with PMP, Connected IoT Sensor Node.
USB HID Peripheral / HID Device
The PIC32MX270F512LT-I/PT's integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver makes it a strong fit for USB HID devices such as keyboards, mice, game controllers, custom HID, and CDC virtual COM port designs. With 512 KB Flash and 64 KB SRAM, there is ample headroom for the Microchip MLA USB stack plus application logic, while 40 MIPS ensures responsive HID polling at the USB 1 ms frame interval. Place the MCU directly on the USB bus with the on-chip 3.3 V regulator, and use PPS to map USB D+/D- and VBUS sensing to convenient pins. Compared to a discrete USB PHY solution, the integrated transceiver reduces BOM cost by ~$0.50 and frees PCB area, with the trade-off that only Full-Speed (12 Mbps) is supported.
Recommended
Capacitive Touch User Interface (CTMU)
The PIC32MX270F81F81LT-I/PT integrates Microchip's Charge Time Measurement Unit (CTMU), which combined with the mTouch library enables buttons, sliders, and proximity sensing without an external touch controller. With up to 81 GPIO on the 100-pin TQFP, the MCU can drive medium-complexity touch panels, and the 512 KB Flash provides storage for touch algorithms plus UI state machines. Use PPS to assign CTMU outputs to any I/O, and leverage the on-chip RTCC for wake-on-touch timing. Compared to external touch ICs, the CTMU approach eliminates ~$0.30-0.80 in BOM cost and removes an I2C/SPI bus from the design, at the expense of needing careful PCB ground/pour management for stable touch baselines.
Recommended
Audio Streaming with I2S Codec
The PIC32MX270F512LT-I/PT's two dedicated I2S modules plus four SPI/I2S-capable serial interfaces make it well-suited for audio streaming designs such as Bluetooth/I2S sinks, audio DAC interfaces, and USB audio class devices. At 40 MIPS, the MCU has enough headroom to run sample-rate conversion and basic DSP alongside the USB audio stack, while 64 KB RAM holds audio buffers for short-latency playback. Route I2S bit clock, word clock, and data through PPS to optimize PCB layout, and use the on-chip DMA to offload the CPU. The PIC32MX270 is often paired with a CS33046A-class audio DAC. Compared to dedicated audio DSPs, the approach trades absolute audio performance for BOM integration and lower software complexity.
Recommended
CAN-USB Industrial Bridge
The PIC32MX270F512LT-I/PT integrates both USB OTG and CAN 2.0B controllers, making it a natural choice for CAN-to-USB bridges used in industrial gateways, automotive diagnostics, and factory-floor monitoring. With 512 KB Flash, firmware can host Microchip's MLA USB CDC stack plus CAN driver simultaneously, while 64 KB RAM holds CAN message buffers for short bursts of bus traffic. Use PPS to map CAN TX/RX and USB D+/D- away from each other for cleaner routing. The 100-pin TQFP exposes enough GPIO for status LEDs and configuration switches. Compared to a discrete USB + CAN solution, the integrated approach saves ~$1.00-2.00 in BOM and simplifies firmware bring-up, at the price of limiting full-Speed USB throughput for high-volume logging.
Recommended
Low-Cost HMI Panel with PMP
The PIC32MX270F512LT-I/PT's Parallel Master Port (PMP) with dual read/write buffers makes it a strong fit for low-cost graphical HMI panels driven by small TFT LCDs or character displays. At 40 MIPS the MCU has enough throughput to refresh a 320x240 QVLC-style display via DMA while running touch and USB connectivity code, and the 100-pin TQFP exposes enough GPIO for backlight control, touch interrupt, and parallel data bus. Pair with a Microchip's ili9341-class TFT driver to bring up an HMI panel with no external graphics controller. Compared to an MCU + external GPU approach, the integrated PMP saves ~$1.50-3.00 in BOM but limits display resolution to small/medium panels.
Recommended
Connected IoT Sensor Node
The PIC32MX270F512LT-I/PT is a strong choice for connected sensor platforms thanks to its combination of USB, ADC, comparators, CTMU, and ample Flash/RAM for protocol stacks. In a battery-powered sensor node, the RTCC plus deep-sleep current enable wake-on-event scheduling while USB OTG allows field firmware upgrades and charging. With 512 KB Flash, designers can host a Wi-Fi TLS III client plus sensor fusion code, and 64 KB RAM holds transient measurement windows. Use the PIC32MX270's low-power sleep modes as DeepSleep, where the part consumes only a few microamps. Use PPS to remap any peripheral to free pins for sensor routing. Compared to Cortex-M0+ IoT MCUs, the PIC32MX270 trades lower active power efficiency for higher MIPS throughput and richer on-chip peripherals.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX270F512LT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX270F512L-50I/PT | PIC32MX270F512HT-I/PT | PIC32MX270F512HT-50I/PT | PIC32MX170F512LT-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (12x12) | 100-pin TQFP (12x12) | 100-pin TQFP (12x12) | 100-pin TQFP (12x12) | 100-pin TQFP (12x12) |
| Maximum CPU Speed | 40 MHz / 40 MIPS | 50 MHz / 50 MIPS (+25%) | 40 MHz / 40 MIPS | 50 MHz / 50 MIPS (+25%) | 40 MHz / 40 MIPS |
| Program Flash | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB OTG | Yes (USB 2.0 FS, integrated PHY) | Yes (USB 2.0 FS, integrated PHY) | Yes (USB 2.0 FS, integrated PHY) | Yes (USB 2.0 FS, integrated PHY) | No |
| CAN 2.0B | Yes | Yes | Yes | Yes | No |
| I2S Modules | 2 | 2 | 2 | 2 | 2 |
| GPIO | Up to 81 | Up to 81 | Up to 81 | Up to 81 | Up to 81 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG with on-chip PHY (vs PIC32MX170F512LT-I/PT)
- MIPS M4K core delivers 83 DMIPS at 40 MHz with 5-stage pipeline (vs PIC32MX170F512LT-I/PT)
- Peripheral Pin Select (PPS) remapping for flexible PCB layout (vs Fixed-pin PIC24 / PIC32MX1xx/2xx lower-density families)
Design Notes
The PIC32MX270F512LT-I/PT requires a clean 2.3-3.6 V supply; use a low-noise LDO (e.g. MCP1700L) with at least 10uF bulk + 0.1uF decoupling at each VDD pin pair. Place the decoupling capacitor as close as physically possible to the VDD/VSS pin pair (within 2 mm) to minimize switching noise coupling into the ADC and CTMU subsystems. The integrated USB transceiver draws additional transient current during bus activity, so the source impedance of the LDO should stay below 0.5 ohm at 100 kHz.
Use Peripheral Pin Select (PPS) to remap digital peripherals to convenient pins, and group related signals (USB D+/D-, I2S bit clock/word clock/data, PMP data/address) to keep PCB routing short and avoid crossing analog signals. Route the USB D+/D- pair as a 90 ohm differential trace with matched length (within 0.5 mm) and keep them clear of switching power and PWM signals. The CTMU touch electrodes should be guarded by a hatched ground pour to reduce stray capacitance.
The 100-pin TQFP package has a typical theta_JA of approximately 30-40 C/W on a standard 4-layer JEDEC test board. The PIC32MX176 draws up to ~70 mA at 40 MHz with USB-active plus peripherals enabled, so worst-case power dissipation stays well under 0.3 W and thermal shutdown is unlikely. For industrial -40C to +85C operation, no heatsink is needed; for designs operating at extended 105C ambient (E-temp variant), use a copper pour under the exposed pad area to keep junction temperature below 125C.
Common design pitfalls include: (1) failing to enable the PLL correctly when migrating from a 40 MHz design to a 50 MHz design (the 50I variants require careful PLL configuration per DS60001185); (2) assuming all PIC32MX270 100-pin TQFP variants have identical peripheral counts - some variants lack CAN or USB; (3) not configuring the RTCC crystal load capacitors per the datasheet, leading to RTC drift; (4) forgetting to enable PPS unlocking sequence in code before remapping peripheral functions.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. AEC-Q100 not applicable for this commercial/industrial part; PIC32 variants with V-suffix meet AEC-Q100 Grade 1 if automotive qualification is required.
