PIC32MX350F128LT-I/PF - 80MHz 32-bit MCU 128KB Flash TQFP-100
MPN: PIC32MX350F128LT-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.1 | $5.10 |
| 10 | $4.61 | $46.10 |
| 100 | $4.11 | $411.00 |
| 500 | $3.7 | $1,850.00 |
| 1,000 | $3.32 | $3,320.00 |
PIC32MX350F128LT-I/PF Overview
A microcontroller (MCU) is an integrated circuit that contains a processor core, program memory, data memory, and configurable peripherals on a single die. Microcontrollers form the control backbone of embedded systems, ranging from consumer appliances to industrial automation. Within the broader taxonomy, the PIC32MX350 sits in the 32-bit MCU category, above 8-bit and 16-bit microcontrollers in raw performance (measured in DMIPS), and below microprocessor units (MPUs) that require external memory.
Key features include 100 MHz/131 DMIPS core performance, Peripheral Pin Select (PPS) for flexible pin assignment, an on-chip Charge Time Measurement Unit (CTMU), an RTCC with calendar mode, and hardware crypto acceleration on select variants. The I2S/SSP interfaces enable direct connection to audio codecs for multimedia applications. The 2.3V to 3.6V operating range makes the device suitable for battery-powered designs.
The PIC32 architecture implements a five-stage pipeline with Harvard-style separate Flash and SRAM buses, supporting single-cycle Flash access with prefetch. This results in deterministic interrupt latency suitable for hard-real-time control loops. The integrated DMA engine offloads data movement from the core, enabling peripherals such as the PMP (for graphics interfaces) and ADC to operate without CPU intervention.
Typical applications include industrial motor control, USB peripherals, graphical user interfaces (PMP-driven LCDs), audio playback devices, IoT edge nodes, and automotive body modules. The wide peripheral mix makes the PIC32MX350 particularly attractive when a single chip must serve as USB host/device, run a graphical HMI, and communicate with sensors via I2C/SPI/UART.
Designers should plan oscillator and decoupling layout to meet the 80 MHz timing budget; PPS remapping must be configured early in initialization since PPS lock bits are one-way programmable. Power sequencing considerations apply when interfacing with 5V logic - use level shifters since I/O are not 5V tolerant on most pins.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX350F128LT-I/PF — 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/PF (same form factor and footprint) — differing in Package, ADC, MSL Level, Timers, SPI / I2S.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX370F512LT-I/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX450F256LT-I/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX330F128LT-I/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX350F128L-I/PF
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX350F128LT-80V/PF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX350F128LT-I/PT
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC32MX350F128LT-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 100 MHz (this part operates at 80 MHz) |
| DMIPS Rating | 131 DMIPS at 100 MHz |
| Program Memory (Flash) | 128 KB (plus 12 KB auxiliary) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C (industrial grade) |
| I/O Pins | 83 (on 100-pin TQFP) |
| ADC | 10-bit, up to 28 channels |
| Analog Comparators | 2 |
| SPI/I2S Modules | 2 |
| I2C Modules | 2 |
| UART Modules | 6 |
| Parallel Master Port (PMP) | Yes |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Package | 100-pin TQFP (PF), 14x14 mm |
| Peripheral Pin Select (PPS) | Yes |
| Charge Time Measurement Unit (CTMU) | Yes |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX350F128LT-I/PF Pin Configuration
| Pin 1 | RP10/RD10 — Remappable peripheral I/O / I/O port D10 |
| Pin 2 | RP11/RD11 — Remappable peripheral I/O / I/O port D11 |
| Pin 3 | VSS — Ground reference |
| Pin 4 | VDD — Digital supply (2.3-3.6V) |
| Pin 5 | RP12/RD12 — Remappable peripheral I/O / I/O port D12 |
| Pin 6 | RP13/RD13 — Remappable peripheral I/O / I/O port D13 |
| Pin 7 | RP14/RD14 — Remappable peripheral I/O / I/O port D14 |
| Pin 8 | RP15/RD15 — Remappable peripheral I/O / I/O port D15 |
| Pin 9 | RF0 — I/O port F0 |
| Pin 10 | RF1 — I/O port F1 |
| Pin 11 | PGED2/RP20/RD0 — ICSP data line / remappable peripheral I/O / I/O port D0 |
| Pin 12 | PGEC2/RP21/RD1 — ICSP clock line / remappable peripheral I/O / I/O port D1 |
| Pin 13 | RP22/RD2 — Remappable peripheral I/O / I/O port D2 |
| Pin 14 | RP23/RD3 — Remappable peripheral I/O / I/O port D3 |
| Pin 15 | RP24/RD4 — Remappable peripheral I/O / I/O port D4 |
| Pin 16 | RP25/RD5 — Remappable peripheral I/O / I/O port D5 |
| Pin 17 | VSS — Ground reference |
| Pin 18 | VDD — Digital supply (2.3-3.6V) |
| Pin 19 | RP26/RD6 — Remappable peripheral I/O / I/O port D6 |
| Pin 20 | RP27/RD7 — Remappable peripheral I/O / I/O port D7 |
| Pin 21 | RC1 — I/O port C1 |
| Pin 22 | RC2 — I/O port C2 |
| Pin 23 | RC3 — I/O port C3 |
| Pin 24 | RC4 — I/O port C4 |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Digital supply (2.3-3.6V) |
| Pin 27 | PGED1/RP0/RB0 — ICSP data line / remappable peripheral I/O / I/O port B0 |
| Pin 28 | PGEC1/RP1/RB1 — ICSP clock line / remappable peripheral I/O / I/O port B1 |
| Pin 29 | RP2/RB2 — Remappable peripheral I/O / I/O port B2 |
| Pin 30 | RP3/RB3 — Remappable peripheral I/O / I/O port B3 |
| Pin 31 | RP4/RB4 — Remappable peripheral I/O / I/O port B4 |
| Pin 32 | RP5/RB5 — Remappable peripheral I/O / I/O port B5 |
| Pin 33 | VSS — Ground reference |
| Pin 34 | VDD — Digital supply (2.3-3.6V) |
| Pin 35 | RP6/RB6 — Remappable peripheral I/O / I/O port B6 |
| Pin 36 | RP7/RB7 — Remappable peripheral I/O / I/O port B7 |
| Pin 37 | RP8/RB8 — Remappable peripheral I/O / I/O port B8 |
| Pin 38 | RP9/RB9 — Remappable peripheral I/O / I/O port B9 |
| Pin 39 | VSS — Ground reference |
| Pin 40 | OSC1/CLKI/RC12 — Crystal oscillator input / external clock input / I/O port C12 |
| Pin 41 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output / I/O port C15 |
| Pin 42 | VSS — Ground reference |
| Pin 43 | VDD — Digital supply (2.3-3.6V) |
| Pin 44 | SOSCI/RP13/C13 — Secondary oscillator input / remappable peripheral I/O / I/O port C13 |
| Pin 45 | SOSCO/T1CK/C14 — Secondary oscillator output / Timer1 clock / I/O port C14 |
| Pin 46 | RA0 — I/O port A0 |
| Pin 47 | RA1 — I/O port A1 |
| Pin 48 | RA2 — I/O port A2 |
| Pin 49 | RA3 — I/O port A3 |
| Pin 50 | RA4 — I/O port A4 |
| Pin 51 | RA5 — I/O port A5 |
| Pin 52 | VSS — Ground reference |
| Pin 53 | VDD — Digital supply (2.3-3.6V) |
| Pin 54 | RB10 — I/O port B10 |
| Pin 55 | RB11 — I/O port B11 |
| Pin 56 | RB12 — I/O port B12 |
| Pin 57 | RB13 — I/O port B13 |
| Pin 58 | RB14 — I/O port B14 |
| Pin 59 | RB15 — I/O port B15 |
| Pin 60 | VSS — Ground reference |
| Pin 61 | VDD — Digital supply (2.3-3.6V) |
| Pin 62 | RC0 — I/O port C0 |
| Pin 63 | RC5 — I/O port C5 |
| Pin 64 | RC6 — I/O port C6 |
| Pin 65 | RC7 — I/O port C7 |
| Pin 66 | RC8 — I/O port C8 |
| Pin 67 | RC9 — I/O port C9 |
| Pin 68 | VSS — Ground reference |
| Pin 69 | VDD — Digital supply (2.3-3.6V) |
| Pin 70 | RC10 — I/O port C10 |
| Pin 71 | RC11 — I/O port C11 |
| Pin 72 | RB0/AN0 — I/O port B0 / analog input 0 |
| Pin 73 | RB1/AN1 — I/O port B1 / analog input 1 |
| Pin 74 | RB2/AN2 — I/O port B2 / analog input 2 |
| Pin 75 | RB3/AN3 — I/O port B3 / analog input 3 |
| Pin 76 | RB4/AN4 — I/O port B4 / analog input 4 |
| Pin 77 | RB5/AN5 — I/O port B5 / analog input 5 |
| Pin 78 | VSS — Ground reference |
| Pin 79 | VDD — Digital supply (2.3-3.6V) |
| Pin 80 | RB6/AN6 — I/O port B6 / analog input 6 |
| Pin 81 | RB7/AN7 — I/O port B7 / analog input 7 |
| Pin 82 | RB8/AN8 — I/O port B8 / analog input 8 |
| Pin 83 | RB9/AN9 — I/O port B9 / analog input 9 |
| Pin 84 | RB10/AN10 — I/O port B10 / analog input 10 |
| Pin 85 | RB11/AN11 — I/O port B11 / analog input 11 |
| Pin 86 | VSS — Ground reference |
| Pin 87 | VDD — Digital supply (2.3-3.6V) |
| Pin 88 | RD8 — I/O port D8 |
| Pin 89 | RD9 — I/O port D9 |
| Pin 90 | RB12/AN12 — I/O port B12 / analog input 12 |
| Pin 91 | RB13/AN13 — I/O port B13 / analog input 13 |
| Pin 92 | RB14/AN14 — I/O port B14 / analog input 14 |
| Pin 93 | RB15/AN15 — I/O port B15 / analog input 15 |
| Pin 94 | VSS — Ground reference |
| Pin 95 | AVDD — Analog supply (2.3-3.6V) |
| Pin 96 | AVSS — Analog ground reference |
| Pin 97 | VREF+/CVREF+/AN16 — Voltage reference positive input / comparator voltage reference / analog input 16 |
| Pin 98 | VREF-/CVREF-/AN17 — Voltage reference negative input / comparator voltage reference / analog input 17 |
| Pin 99 | MCLR — Master clear (reset) input - pull-up enabled in software |
| Pin 100 | VSS — Ground reference |
Typical Applications
PIC32MX350F128LT-I/PF is suitable for 6 applications: Industrial Motor Control and Drive, USB Peripherals and HID Devices, Graphical HMI with PMP-Driven LCDs, Audio Playback Devices with I2S Codecs, IoT Edge Nodes and Sensor Hubs, Automotive Body and Comfort Modules.
Industrial Motor Control and Drive
The PIC32MX350F128LT-I/PF is well suited for industrial motor control applications where its 80 MHz MIPS32 M4K core delivers deterministic 100 MHz-class DMIPS performance for FOC and PID loops. The integrated 10-bit ADC with up to 28 channels samples phase currents and bus voltage with hardware-triggered conversion synchronized to PWM, while 6 UART channels link to sensor and gateway subsystems. Hardware CTMU enables capacitive touch sensing for HMI panels on industrial machinery. The 2.3-3.6V operating range and -40 to +105 C industrial temperature rating ensure reliable operation on factory floors.
Recommended
USB Peripherals and HID Devices
The PIC32MX350F128LT-I/PF integrates a USB 2.0 Full-Speed controller with on-chip transceiver and OTG support, eliminating the need for an external PHY. With 80 MHz CPU performance and 32 KB RAM, the part runs the Microchip USB stack (HID, CDC, MSD, audio) alongside application firmware. USB endpoints and DMA offload data movement from the core, sustaining 12 Mbps throughput while leaving CPU bandwidth for protocol handling. OTG mode enables dual-role device/host designs such as USB keyboards, custom test instruments, and field-updatable industrial terminals.
Recommended
Graphical HMI with PMP-Driven LCDs
The PIC32MX350F128LT-I/PF includes a Parallel Master Port (PMP) capable of driving 8-bit or 16-bit parallel LCDs, making it a strong choice for graphical HMI panels in appliances, point-of-sale terminals, and instrument front panels. The 80 MHz core and DMA controller refresh the display without CPU overhead, while the Peripheral Pin Select (PPS) reassigns digital functions to alternate pins to avoid PMP pin conflicts. With 128 KB Flash, the device accommodates full-framebuffer or compressed graphics libraries (TinyGL, Microchip gfx) for typical 320x240 or 480x272 panels.
Recommended
Audio Playback Devices with I2S Codecs
The PIC32MX350F128LT-I/PF features two SPI/I2S modules that interface directly with audio codecs (e.g., Wolfson/Cirrus devices) for digital audio playback and recording. At 80 MHz, the MCU executes audio processing algorithms (graphic EQ, dynamic range compression, mixing) with low CPU overhead. The DMA engine streams samples between codec and memory without CPU intervention, freeing bandwidth for UI logic. With 32 KB RAM the device handles typical 48 kHz / 16-bit stereo playback buffers comfortably, making it suitable for Bluetooth speakers, intercoms, and standalone audio alert modules.
Recommended
IoT Edge Nodes and Sensor Hubs
The PIC32MX350F128LT-I/PF operates across 2.3-3.6V with low-power sleep modes, making it suitable for battery-powered IoT edge devices and sensor hubs. Six UART and two I2C channels aggregate multiple sensor inputs (temperature, humidity, motion) to a wireless co-processor via UART or SPI. The CTMU and 28-channel ADC interface directly with capacitive touch buttons and analog sensors without external components. Peripheral Pin Select allows pin re-routing to optimize PCB layout for compact wearable and smart-home device form factors.
Recommended
Automotive Body and Comfort Modules
The PIC32MX350F128LT-I/PF (industrial grade variant) suits non-safety automotive body electronics such as HVAC controls, seat controllers, and lighting modules that require rich peripheral integration but not AEC-Q100 qualification. CAN peripheral networking, 6 UART channels, and the CTMU drive capacitive touch interfaces for steering-wheel switches and door panels. With 128 KB Flash and 32 KB RAM, the device hosts comfort control algorithms, lighting fade sequences, and LIN/CAN gateway logic simultaneously. For AEC-Q100 designs, Microchip offers automotive-grade PIC32MX variants in the same family.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX350F128LT-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX370F512LT-I/PF | PIC32MX450F256LT-I/PF | PIC32MX330F128LT-I/PF |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (PF) 14x14 mm | 100-pin TQFP (PF) 14x14 mm - same | 100-pin TQFP (PF) 14x14 mm - same | 100-pin TQFP (PF) 14x14 mm - same |
| Core Architecture | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same |
| Maximum CPU Frequency | 80 MHz | 80 MHz - same | 80 MHz - same | 80 MHz - same |
| Flash Memory | 128 KB | 512 KB (+300%) | 256 KB (+100%) | 128 KB - same |
| SRAM | 32 KB | 128 KB (+300%) | 64 KB (+100%) | 32 KB - same |
| USB Module | Yes (Device/Host/OTG) | Yes - same | Yes - same | No |
| Hardware Crypto Engine | No | No | Yes | No |
| Operating Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V - same | 2.3 V to 3.6 V - same | 2.3 V to 3.6 V - same |
Key Differentiators
- USB 2.0 OTG with integrated PHY (vs PIC32MX330F128LT-I/PF)
- 3x memory capacity over PIC32MX330 (vs PIC32MX330F128LT-I/PF)
- Industrial temperature range -40 to +105 C (vs Commercial PIC32MX (no I-suffix))
Design Notes
Place 0.1uF ceramic decoupling capacitors as close as possible to each VDD pin (12 pins total on TQFP-100). Add a single 10uF bulk capacitor near the package. Separate analog supply (AVDD/AVSS) and digital supply pins - both are required even if the MCU does not use ADC. Use ferrite bead isolation if AVDD is sourced from a noisy digital rail to preserve ADC accuracy.
TQFP-100 has 0.5mm pitch pins requiring careful PCB layout. Use at least 4-layer board with dedicated ground plane to control trace impedance and minimize EMI. Route the 8 MHz or 10 MHz primary crystal traces symmetrically within 1 cm of OSC1/OSC2 and shield with a ground guard ring. MCLR pin requires external 10k pull-up to VDD; do not leave floating.
Peripheral Pin Select (PPS) lock bits are one-way programmable - if your firmware accidentally locks an unintended mapping, the device must be reset and the configuration erased via ICSP. Always validate PPS assignments during development before deploying. Additionally, the I2C module uses open-drain outputs requiring external pull-up resistors (typically 4.7k) on SCL/SDA lines.
USB D+/D- lines require 90-ohm differential routing and matched length to within 150 mil for USB Full-Speed compliance. Place the 15k pull-down resistor on D- at the device side. Keep USB traces away from high-frequency switching nodes. The integrated USB PHY requires precise 48 MHz clock; use a crystal with low ppm tolerance (50 ppm max) to avoid USB certification failures.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40 to +105 C) is suitable for non-safety automotive body modules; AEC-Q100 qualified variants are not listed for this part number. The 'I-suffix' denotes industrial grade; AEC-Q100 grades require separate ordering suffix.