PIC32MX350F256LT-I/PF - 32-bit PIC32MX MCU 80MHz 256KB | Microchip
MPN: PIC32MX350F256LT-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $6.12 | $61.20 |
| 100 | $5.45 | $545.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.2 | $4,200.00 |
| 3,000 | $3.62 | $10,860.00 |
PIC32MX350F256LT-I/PF Overview
A 32-bit microcontroller (MCU) is a single-chip processor with a 32-bit datapath, registers, and ALU, enabling higher code density and richer data handling than 8-bit or 16-bit MCUs. PIC32MX sits within Microchip's MIPS-based PIC32 family, which is itself a sub-family of the broader 32-bit MCU market. These devices bridge the gap between 8-bit PIC MCUs and Cortex-M class parts, offering deterministic interrupt response, low power modes, and a wide range of integrated peripherals aimed at consumer, industrial, IoT, and motor-control applications.
Key features of the PIC32MX350F256LT-I/PF include hardware multipliers and dividers that accelerate DSP-style operations, a Peripheral Pin Select (PPS) remappable I/O architecture that lets most digital peripherals be assigned to most I/O pins, and a charge-pump regulator that allows full 80 MHz operation from a 2.3V to 3.6V supply without external clocks or regulators. The 256 KB Flash is split into 232 KB user code plus 12 KB boot Flash. Five 16-bit timers/counters, two I2C, two SPI/I2S, and a USB 2.0 full-speed On-The-Go controller (per family datasheet) round out the integrated peripherals. An RTCC, JTAG debugger, and trace boundary-scan interface are supported, plus 5 PWM channels from the OC module and a 16-bit PMP for external parallel bus expansion.
The architecture is built on a Harvard-style memory bus with a 5-stage pipeline, prefetch cache, and tightly-coupled flash, giving it strong Dhrystone 2.1 performance per MHz for deterministic control loops. PPS enables flexible PCB routing, especially useful when migrating between pin-compatible PIC32 variants or when a layout conflict forces a different pin assignment.
Typical applications include industrial control panels, home appliances, motor-control front-ends, IoT gateways, USB peripherals, human-machine interface (HMI) boards, and consumer audio/graphics controllers. Wide operating range (-40C to +85C) suits industrial and outdoor enclosures.
When designing with this part, verify pin assignments via PPS early in the schematic phase because PPS can remap most peripherals but imposes order-of-assignment rules that affect simulation models. Plan code size carefully within the 232 KB user partition (the boot partition may pad to 256 KB).
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet - useful for embedded engineers comparing Microchip PIC32 options or sourcing cross-compatible variants.
Drop-in alternatives for PIC32MX350F256LT-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 PIC32MX350F256LT-I/PF (same form factor and footprint) — differing in Package, ADC, Mounting Type, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX350F256LT-I/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX370F512LT-I/PF
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX270F512LT-I/PF
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC32MX340F256L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F256L-I/PF
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX460F512L-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX350F256LT-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 80 MHz |
| Program Flash Memory | 256 KB (232 KB user + 12 KB boot) |
| SRAM | 64 KB |
| Pin Count | 100 |
| Package | TQFP-100 (14x14 mm) |
| Supply Voltage Range | 2.3 V to 3.6 V |
| ADC | 10-bit, 1 Msps, up to 28 channels |
| Analog Comparators | 2 |
| I2C | 2 modules |
| SPI / I2S | 2 modules (SPI or I2S configurable) |
| Timers/Counters | 5 x 16-bit |
| Output Compare / PWM | 5 x 16-bit OC channels |
| Parallel Master Port (PMP) | 16-bit external bus interface |
| Peripheral Pin Select (PPS) | Yes (remappable digital peripherals) |
| Operating Temperature | -40C to +85C (Industrial, -I suffix) |
| Mounting Type | Surface Mount (Tape & Reel, T suffix) |
| RoHS Status | Compliant |
| MSL Level | MSL 3 (JEDEC J-STD-020) |
PIC32MX350F256LT-I/PF Pin Configuration
| Pin 1 | RG15 — PPS-mappable digital I/O |
| Pin 2 | RG12 — PPS-mappable digital I/O / external interrupt |
| Pin 3 | RG13 — PPS-mappable digital I/O |
| Pin 4 | RG14 — PPS-mappable digital I/O |
| Pin 5 | VDD — Positive supply (2.3V to 3.6V) |
| Pin 6 | VSS — Ground |
| Pin 7 | RF0 — PPS-mappable digital I/O |
| Pin 8 | RF1 — PPS-mappable digital I/O |
| Pin 9 | RG0 — PPS-mappable digital I/O |
| Pin 10 | RG1 — PPS-mappable digital I/O |
| Pin 11 | RF2 — PPS-mappable digital I/O |
| Pin 12 | RF3 — PPS-mappable digital I/O |
| Pin 13 | RG2 — PPS-mappable digital I/O |
| Pin 14 | RG3 — PPS-mappable digital I/O |
| Pin 15 | RG4 — PPS-mappable digital I/O |
| Pin 16 | RG5 — PPS-mappable digital I/O |
| Pin 17 | VDD — Positive supply |
| Pin 18 | VSS — Ground |
| Pin 19 | RA0 — Analog input / digital I/O |
| Pin 20 | RA1 — Analog input / digital I/O |
| Pin 21 | RB0 — PPS-mappable digital I/O / programming |
| Pin 22 | RB1 — PPS-mappable digital I/O |
| Pin 23 | RB2 — PPS-mappable digital I/O |
| Pin 24 | RB3 — PPS-mappable digital I/O |
| Pin 25 | RC12 — PPS-mappable digital I/O |
| Pin 26 | RC15 — PPS-mappable digital I/O |
| Pin 27 | RC13 — PPS-mappable digital I/O |
| Pin 28 | RC14 — PPS-mappable digital I/O |
| Pin 29 | RD0 — PPS-mappable digital I/O |
| Pin 30 | RD1 — PPS-mappable digital I/O |
| Pin 31 | RD2 — PPS-mappable digital I/O |
| Pin 32 | RD3 — PPS-mappable digital I/O |
| Pin 33 | RD4 — PPS-mappable digital I/O |
| Pin 34 | RD5 — PPS-mappable digital I/O |
| Pin 35 | RD6 — PPS-mappable digital I/O |
| Pin 36 | RD7 — PPS-mappable digital I/O |
| Pin 37 | RC0 — PPS-mappable digital I/O |
| Pin 38 | RC1 — PPS-mappable digital I/O |
| Pin 39 | RC2 — PPS-mappable digital I/O |
| Pin 40 | RC3 — PPS-mappable digital I/O |
| Pin 41 | RC4 — PPS-mappable digital I/O |
| Pin 42 | RC5 — PPS-mappable digital I/O |
| Pin 43 | VSS — Ground |
| Pin 44 | VDD — Positive supply |
| Pin 45 | RB4 — PPS-mappable digital I/O |
| Pin 46 | RB5 — PPS-mappable digital I/O / OC PWM |
| Pin 47 | RB6 — PPS-mappable digital I/O |
| Pin 48 | RB7 — PPS-mappable digital I/O |
| Pin 49 | RB8 — PPS-mappable digital I/O |
| Pin 50 | RB9 — PPS-mappable digital I/O |
| Pin 51 | RB10 — PPS-mappable digital I/O |
| Pin 52 | RB11 — PPS-mappable digital I/O |
| Pin 53 | RB12 — PPS-mappable digital I/O |
| Pin 54 | RB13 — PPS-mappable digital I/O |
| Pin 55 | RB14 — PPS-mappable digital I/O |
| Pin 56 | RB15 — PPS-mappable digital I/O |
| Pin 57 | RD8 — PPS-mappable digital I/O |
| Pin 58 | RD9 — PPS-mappable digital I/O |
| Pin 59 | RD10 — PPS-mappable digital I/O |
| Pin 60 | RD11 — PPS-mappable digital I/O |
| Pin 61 | RD13 — PPS-mappable digital I/O |
| Pin 62 | RD12 — PPS-mappable digital I/O |
| Pin 63 | RC6 — PPS-mappable digital I/O |
| Pin 64 | RC7 — PPS-mappable digital I/O |
| Pin 65 | RC8 — PPS-mappable digital I/O |
| Pin 66 | RC9 — PPS-mappable digital I/O |
| Pin 67 | VSS — Ground |
| Pin 68 | VDD — Positive supply |
| Pin 69 | RA2 — Analog input / digital I/O |
| Pin 70 | RA3 — Analog input / digital I/O |
| Pin 71 | RA4 — Analog input / digital I/O |
| Pin 72 | RA5 — Analog input / digital I/O |
| Pin 73 | RA6 — Analog input / digital I/O |
| Pin 74 | RA7 — Analog input / digital I/O |
| Pin 75 | RA8 — Analog input / digital I/O |
| Pin 76 | RA9 — Analog input / digital I/O |
| Pin 77 | RA10 — Analog input / digital I/O |
| Pin 78 | RA11 — Analog input / digital I/O |
| Pin 79 | RE0 — PPS-mappable digital I/O |
| Pin 80 | RE1 — PPS-mappable digital I/O |
| Pin 81 | RE2 — PPS-mappable digital I/O |
| Pin 82 | RE3 — PPS-mappable digital I/O |
| Pin 83 | RE4 — PPS-mappable digital I/O |
| Pin 84 | RE5 — PPS-mappable digital I/O |
| Pin 85 | RE6 — PPS-mappable digital I/O |
| Pin 86 | RE7 — PPS-mappable digital I/O |
| Pin 87 | RF4 — PPS-mappable digital I/O |
| Pin 88 | RF5 — PPS-mappable digital I/O |
| Pin 89 | RG6 — PPS-mappable digital I/O |
| Pin 90 | RG7 — PPS-mappable digital I/O |
| Pin 91 | RG8 — PPS-mappable digital I/O |
| Pin 92 | RG9 — PPS-mappable digital I/O |
| Pin 93 | VDD — Positive supply |
| Pin 94 | VSS — Ground |
| Pin 95 | RG10 — PPS-mappable digital I/O |
| Pin 96 | RG11 — PPS-mappable digital I/O |
| Pin 97 | RC10 — PPS-mappable digital I/O |
| Pin 98 | RC11 — PPS-mappable digital I/O |
| Pin 99 | RD14 — PPS-mappable digital I/O |
| Pin 100 | RD15 — PPS-mappable digital I/O |
Typical Applications
PIC32MX350F256LT-I/PF is suitable for 6 applications: Industrial Control Panel HMI, USB Peripheral Device, Home Appliance Motor Control, IoT Sensor Gateway, Consumer Audio Controller, Point-of-Sale Terminal.
Industrial Control Panel HMI
The PIC32MX350F256LT-I/PF fits industrial control panels because of its 80 MHz MIPS32 M4K core for responsive touch UI and its 64 KB SRAM to host graphics buffers. Its 256 KB Flash (232 KB user) accommodates a real-time GUI library plus the IEC 61131-3-style control logic. The 10-bit 1 Msps ADC with 28 channels digitizes sensor feedback from temperature, pressure, and current transducers. PPS allows flexible PCB routing when the panel layout has tight constraints, and the industrial -40C to +85C rating supports outdoor enclosures. Place the MCU between the display driver and field I/O to centralize control and reduce BOM cost versus Cortex-M class parts at the same price tier.
Recommended
USB Peripheral Device
The PIC32MX350F256LT-I/PF can serve as a USB peripheral controller because the PIC32MX3/4 family integrates a USB 2.0 full-speed OTG controller (subject to variant confirmation). Its 80 MHz CPU provides sufficient bandwidth to handle USB protocol stack plus application data transfer without offloading to a dedicated USB controller. The 64 KB SRAM hosts USB endpoint buffers plus a composite device driver. PPS allows flexible routing when PCB layout forces USB pins away from default assignments. Place the part close to the USB receptacle and ESD protection array, with the 48 MHz crystal reference driving the USB PLL for full-speed signaling.
Recommended
Home Appliance Motor Control
The PIC32MX350F256LT-I/PF is suited for home appliances such as washing machines, refrigerators, and HVAC blowers because it combines 5 16-bit timers with 5 OC PWM channels for brushed DC or BLDC motor control. The 2 analog comparators support zero-cross detection and current-sense threshold detection without external hardware. PPS enables flexible PCB routing when the motor driver board has tight space constraints. Place the MCU close to the gate driver with the 16-bit PMP driving parallel LCD displays for the user interface. The 256 KB Flash hosts the motor control state machine plus user interface logic.
Recommended
IoT Sensor Gateway
The PIC32MX350F256LT-I/PF fits IoT sensor gateways because its 2 SPI/I2S and 2 I2C ports can host Wi-Fi, BLE, or LoRa transceivers alongside multiple sensors. The 64 KB SRAM accommodates an RTOS plus TCP/IP stack, and the 256 KB Flash hosts the application code plus over-the-air update boot region. The 80 MHz core executes encryption libraries at usable rates. Place the MCU between the radio module and the sensor farm, with the PPS architecture enabling the radio and sensor buses to share I/O flexibly. Industrial temperature range supports outdoor and industrial deployments.
Recommended
Consumer Audio Controller
The PIC32MX350F256LT-I/PF can drive consumer audio products because its 2 SPI/I2S ports connect to audio DACs and ADCs directly. The 64 KB SRAM hosts audio buffers, while the 256 KB Flash stores firmware plus compressed audio assets. The 10-bit ADC at 1 Msps is sufficient for control feedback, while the I2S bus streams audio data to external DACs. PPS enables flexible PCB routing when the audio board layout has tight signal-integrity requirements. Place the MCU adjacent to the audio CODEC with the I2S clock and data lines routed as impedance-matched differential pairs.
Recommended
Point-of-Sale Terminal
The PIC32MX350F256LT-I/PF serves point-of-sale (POS) terminals because of its high pin count of 100, supporting multiple peripherals: 5 timers for keypad scanning, 2 I2C for secure element / NFC, 2 SPI/I2S for display and printer, plus the 16-bit PMP for parallel TFT display interface. The 64 KB SRAM accommodates the UI stack, and the 256 KB Flash hosts firmware plus transaction records. The 10-bit ADC monitors battery and temperature. PPS allows flexible pin assignments when PCB layout forces peripheral routing around mechanical constraints.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX350F256LT-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX350F256LT-I/PT | PIC32MX370F512LT-I/PF | PIC32MX270F512LT-I/PF | PIC32MX340F256L | PIC32MX250F256L-I/PF | PIC32MX460F512L-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 mm) | TQFP-64 (10x10 mm) | TQFP-100 (14x14 mm) - same | TQFP-100 (14x14 mm) - same | TQFP-100 (14x14 mm) - same | TQFP-100 (14x14 mm) - same | TQFP-100 (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 50 MHz | MIPS32 M4K 80 MHz |
| Flash Memory | 256 KB | 256 KB - same | 512 KB (+100%) | 512 KB (+100%) | 256 KB - same | 256 KB - same | 512 KB (+100%) |
| SRAM | 64 KB | 64 KB - same | 128 KB (+100%) | 128 KB (+100%) | 32 KB (-50%) | 32 KB (-50%) | 32 KB (-50%) |
| Pin Count | 100 | 64 (-36%) | 100 - same | 100 - same | 100 - same | 100 - same | 100 - same |
| Operating Temperature | -40C to +85C | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
| Peripheral Pin Select | Yes | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
Key Differentiators
- Highest pin count in PIC32MX350 family for maximum peripheral expansion (vs PIC32MX350F256LT-I/PT)
- 256 KB Flash with PPS architecture in mid-cost MCU tier (vs PIC32MX340F256L)
- 100-pin TQFP with full PIC32MX3/4 peripheral set (vs PIC32MX250F256L-I/PF)
Design Notes
The PIC32MX350F256LT-I/PF requires 2.3V to 3.6V supply. Decouple each VDD/VSS pair with a 100 nF X7R ceramic plus a 4.7 uF bulk capacitor placed within 5 mm of the VDD pin. The internal 1.2 V LDO powering the core does not require external components. Estimated core current at 80 MHz is approximately 30 mA per MHz of activity; place a 10 uF bulk capacitor on the regulator input to absorb transient load steps. JTAG trace powered separately requires its own decoupling network.
Place the 8 MHz primary crystal within 5 mm of the OSC1/OSC2 pins, with the load capacitors (typically 15-33 pF) routed symmetrically to ground. For USB trace operation the 48 MHz PLL requires the crystal reference; isolate it from noisy switching nodes with a ground guard ring. Keep analog AVREF traces away from digital switching signals with at least 3x trace-spacing distance, and use a separate analog ground island that joins the digital ground only at the MCU ground pin. Estimated PCB area for a 4-layer layout is approximately 30 mm x 30 mm including crystal and bulk caps.
When using PPS, do not map two peripherals to the same pin at the same time - the PIC32MX PPS architecture is one-to-one and conflict surfaces are unreported. Lock configuration registers before user code runs by setting CFGCON bit appropriately, otherwise PPS mappings may be reset unexpectedly. Do not exceed 3.6V on any digital I/O pin; ADC inputs may go higher with care but absolute maximum for AVREF is VDD + 0.3V. Always include the JTAG TDI/TDO pull-ups to keep firmware serial while DEBUG is disabled.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Lead-free and halogen-free per TQFP packaging material. AEC-Q100 not applicable - this is a general-purpose industrial part, not automotive grade. For automotive applications, choose PIC32MX variants with automotive qualification marks on the datasheet.
