PIC32MX350F128LT-I/PT - 32-bit MCU 128KB Flash 100-TQFP | Microchip
MPN: PIC32MX350F128LT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.18 | $51.80 |
| 100 | $4.62 | $462.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.78 | $3,780.00 |
PIC32MX350F128LT-I/PT Overview
A 32-bit microcontroller (MCU) is an integrated circuit containing a processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals in a single chip. Microcontrollers are the central computing element in embedded systems, handling sensor I/O, communication, real-time control, and user-interface tasks. Within the taxonomy hierarchy, a PIC32MX is a MIPS-architecture MCU belonging to the broader categories: MCU -> embedded microcontroller -> microprocessor -> integrated circuit -> semiconductor. PIC32MX devices are commonly used in industrial, consumer, IoT, and automotive subsystems where deterministic real-time performance and strong peripheral integration are required.
Key differentiating specifications include 128KB Flash with self-programming support, 32KB SRAM with DMA, a 5-bit PMP interface for graphics or external memory, and an RTCC with calendar mode. The wide 100-TQFP package exposes 83 I/O pins for parallel buses and complex peripheral routing. The integrated USB 2.0 Full-Speed OTG controller, combined with on-chip comparators and 10-bit ADC, reduces external component count for connected embedded designs.
From an architectural standpoint, the PIC32MX350 employs the MIPS M4K core with a 5-stage pipeline, hardware multiply/divide, and a single-cycle 32-bit ALU. Its peripheral bus matrix allows concurrent DMA-driven transfers across the ADC, SPI, and USB subsystems, which is uncommon at this price tier. The instruction cache and prefetch buffer deliver near-zero-wait-state execution from Flash at full clock speed.
Typical applications include industrial control panels, USB-connected data loggers, consumer HMI with segmented displays, low-cost audio processing with I2S codecs, and sensor hubs. Its USB OTG and ample RAM also make it a fit for embedded web servers using Microchip's TCP/IP stack.
When designing with this part, ensure the 2.5V/3.3V core supply rail is decoupled with 100nF plus bulk ceramic capacitors within 5 mm of the VDD pins. Use a 12 MHz external crystal with the on-chip PLL to drive the system clock at 80 MHz. The unused I/O pins should be configured as outputs low to minimize current leakage.
This page consolidates distributor pricing, verified drop-in alternatives, application notes, and design guidance that goes well beyond the manufacturer product page and into a comparison-friendly format for analog and PowerEdge designers evaluating soldered downstream microcontrollers.
Drop-in alternatives for PIC32MX350F128LT-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 PIC32MX350F128LT-I/PT (same form factor and footprint) — differing in ADC, Core Architecture, I/O Pins, Package, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX350F128L-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX350F128LT-120V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX350F128LT-I/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.32 / Unit
View Datasheet →PIC32MX340F128LT-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F256LT-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX350F128LT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Size | 32-bit |
| Max CPU Speed | 80 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| RAM | 32 KB |
| Package | 100-TQFP (12x12 mm) |
| Pin Count | 100 |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 83 |
| ADC | 10-bit, 28 channels |
| Analog Comparators | 2 |
| I2C | 2 |
| SPI / I2S | 2 |
| UART | 2 |
| USB | USB 2.0 Full-Speed OTG |
| Timers | 5 x 16-bit |
| Operating Temperature | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
PIC32MX350F128LT-I/PT 100-tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for PIC32MX350F128LT-I/PT (100-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 PIC32MX350F128LT-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX350F128LT-I/PT is suitable for 7 applications: USB-Connected Data Logger, Industrial Control Panel HMI, Audio Processing with I2S Codecs, Low-Cost IoT Sensor Hub, Consumer Embedded Web Server, Automotive Auxiliary Control Module, Educational Development Platform.
USB-Connected Data Logger
The PIC32MX350F128LT-I/PT integrates USB 2.0 Full-Speed OTG with 128 KB Flash and 32 KB SRAM, making it well-suited for USB-connected data loggers that stream sensor readings to a host. Its 28-channel 10-bit ADC provides ample analog inputs for multi-sensor acquisition, while DMA offloads data movement from the core, allowing sustained logging at high sample rates. Placed on a custom PCB with external Flash storage, it can serve as a USB-TMC or USB-MSD instrument. Compared to non-USB MCUs, it eliminates the need for an external bridge IC, reducing BOM cost and PCB area for connected test and measurement applications.
Recommended
Industrial Control Panel HMI
With 83 I/O pins and a 5-bit Parallel Master Port, the PIC32MX350F128LT-I/PT supports direct connection to character LCDs, keypads, and segmented displays commonly found in machinery control panels. Its MIPS M4K core running at 80 MHz provides deterministic response times for real-time control loops. The wide 2.3-3.6 V supply range tolerates industrial 24 V bus-derived 3.3 V rails. For panel designs, place the MCU on the back of the PCB with the LCD connector nearby and route PMP data lines as a matched-length group for clean display update transactions.
Recommended
Audio Processing with I2S Codecs
The PIC32MX350F128LT-I/PT provides two SPI/I2S ports capable of driving external audio codecs for low-cost audio playback and recording applications. Its DMA engine can move audio samples between I2S and a buffer in parallel with signal processing. At 80 MHz, the MCU can run audio DSP tasks such as filtering and mixing alongside USB streaming. Compared to MCU-only designs without I2S, this part reduces external component count and BOM cost by integrating the audio serial interface on-chip, ideal for kiosks, intercoms, and consumer audio peripherals.
Recommended
Low-Cost IoT Sensor Hub
The PIC32MX350F128LT-I/PT combines USB connectivity, dual I2C, dual SPI, and dual UART, allowing a single MCU to bridge traffic between a low-power sensor frontend and a host system. Its 32 KB SRAM is sufficient for buffering modest sensor streams, while 128 KB Flash accommodates networking stacks like TCP/IP or USB CDC. Operate at 3.3 V from a regulated rail and use the on-chip RTCC for timestamped logging. Compared to MCU-only designs needing external bridges, this part integrates multiple serial interfaces on-chip, reducing BOM and PCB area for IoT gateways.
Recommended
Consumer Embedded Web Server
The PIC32MX350F128LT-I/PT runs Microchip's TCP/IP stack with 128 KB Flash and 32 KB SRAM, sufficient for embedded web servers managing device configuration, status monitoring, and OTA updates. Its USB OTG and dual UART simplify connectivity to WiFi or Ethernet modules via serial AT commands. At 80 MHz, HTTP request parsing and JSON serialization are achievable for small to medium web UIs. Compared to MCU designs needing an external network controller, this part's peripheral set reduces external component count for connected consumer appliances and home automation hubs.
Recommended
Automotive Auxiliary Control Module
While the standard PIC32MX350F128LT-I/PT is industrial-grade -40C to +85C, it is widely used in non-safety automotive subsystems such as interior lighting controllers, HVAC auxiliary panels, and infotainment peripherals. Its USB OTG supports media interfaces, while 83 I/O drive LEDs, keypads, and small relays. Operate from a 12 V-derived 3.3 V rail with reverse-polarity and load-dump protection. According to the Microchip datasheet, AEC-Q100 qualified derivatives exist in the PIC32MX family for safety-critical automotive applications requiring wider temperature ranges.
Recommended
Educational Development Platform
The PIC32MX350F128LT-I/PT is widely supported by Microchip's MPLAB X IDE, Harmony framework, and a rich ecosystem of free libraries for USB, graphics, and TCP/IP. With 128 KB Flash and 32 KB RAM, it accommodates substantial teaching examples and student projects without out-of-memory errors. Its 100-TQFP package is breadboard-friendly with breakout boards. Compared to MCU platforms lacking comprehensive free tooling, this part's mature software ecosystem accelerates student learning and prototyping for university embedded systems courses.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX350F128LT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX350F128L-I/PT | PIC32MX350F128LT-120V/PT | PIC32MX350F128LT-I/PF | PIC32MX340F128LT-80I/PT | PIC32MX270F256LT-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (12x12 mm) | 100-TQFP (PT) - same | 100-TQFP (PT) - same | 100-TQFP (PF) - same | 100-TQFP (PT) - same | 100-TQFP (PT) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Max CPU Speed | 80 MHz | 80 MHz | 120 MHz | 100 MHz | 80 MHz | 50 MHz |
| USB OTG | Yes (Full-Speed) | Yes | Yes | Yes | No | Yes |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +105C (V) | -40C to +85C | -40C to +85C | -40C to +85C |
| ADC Channels | 28 x 10-bit | 28 | 28 | 28 | 16 | 28 |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG (vs PIC32MX340F128LT-80I/PT)
- Dual I2S audio interface (vs PIC32MX340F128LT-80I/PT)
- 5-bit Parallel Master Port for graphics or memory (vs PIC32MX340F128LT-80I/PT)
Design Notes
The PIC32MX350F128LT-I/PT requires a clean 2.3-3.6 V supply at 80 MHz operation. Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of each VDD/VDDcore pin pair. Add a 4.7 uF or 10 uF bulk tantalum or ceramic capacitor at the regulator output. According to the Microchip datasheet DS60001185K, decoupling the analog AVDD pin separately from digital VDD with a ferrite bead or filter reduces ADC noise coupling by typically 3-5 LSB at 28-input full scan.
Route the 80 MHz system clock traces as short, impedance-matched 50-ohm microstrip lines if external memory or bus peripherals are connected. The 100-TQFP (12x12 mm) package has 0.5 mm pitch leads; use 8 mil traces with 8 mil spaces to escape the pinout. Place the 12 MHz crystal within 5 mm of the OSCI/OSCO pins and ground its case to the ground ring surrounding the MCU. The exposed thermal pad underneath the TQFP must be soldered to a copper pour for mechanical reliability.
Do not skip configuration of unused I/O pins - configure as outputs driven low to minimize current leakage at 80 MHz switching. The USB D+/D- pins require 45-ohm series resistors and a 1.5 kohm pull-up to D- for full-speed operation; omit them only in non-USB designs. Programming via ICSP requires specific pin mapping; refer to the Microchip programming specification before laying out debug headers. According to the datasheet, exceeding 3.6 V on any I/O pin causes permanent damage.
Compliance Information
RoHS compliant per Microchip product page. The I grade operates -40C to +85C industrial range; for AEC-Q100 automotive qualified PIC32MX variants consult the Microchip parametric search filtered to automotive grade.
