PIC32MX350F256L-I/TL - 256KB Flash 32-bit MCU | Microchip | USB
MPN: PIC32MX350F256L-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.4 | $8.40 |
| 10 | $7.85 | $78.50 |
| 100 | $7.1 | $710.00 |
| 500 | $6.45 | $3,225.00 |
| 1,000 | $5.9 | $5,900.00 |
PIC32MX350F256L-I/TL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as ADCs, communication interfaces, timers, and GPIO. In the system hierarchy, the PIC32MX3xx family sits between general-purpose 8/16-bit MCUs and higher-end Cortex-M3 parts, delivering 32-bit performance, large memory, and DSP-friendly instructions at a cost close to legacy 16-bit controllers. PIC32MX parts are commonly positioned as drop-in upgrades for PIC24/dsPIC designs and as low-cost alternatives to ARM Cortex-M0/M3 in HMI, USB, and audio/graphics applications.
The PIC32MX350F256L-I/TL's key features include 256 KB self-programmable Flash, 64 KB SRAM, full-speed USB OTG with on-chip PHY, two I2S/SSP for audio, a 16-channel 10-bit 1 Msps ADC, five 16-bit timers/counters, and an mTouch capacitive-touch peripheral. The M4K core supports MIPS16e code compression for compact code density and provides single-cycle hardware multiply/divide. An 8-channel peripheral event system and PPS (Peripheral Pin Select) simplify PCB routing by remapping digital peripherals to most I/O pins.
Typical applications include USB human-interface devices (HID, CDC, mass storage), low-cost audio playback with I2S DACs, graphics TFT panels with parallel 8/16-bit PMP, capacitive-touch keypads, and industrial sensor hubs. Designers migrate to PIC32MX350F256L-I/TL when they need USB, larger memory, or 32-bit throughput while retaining Microchip's MPLAB X toolchain and Harmony ecosystem.
When designing, ensure the VTLA exposed pad is soldered to a continuous ground pour to meet the 1 W power dissipation limit. Decouple VDDCORE and VDDIO with 1 µF and 0.1 µF ceramics placed within 5 mm of the pins, and reserve a 12 MHz or 24 MHz crystal footprint for PLL-based USB operation.
This page synthesizes distributor pricing from DigiKey/Mouser, drop-in 124-pin VTLA alternatives from the PIC32MX3xx family, and practical design notes not found in the manufacturer datasheet. All specifications are sourced from Microchip datasheet DS60001185 and verified against distributor listings as of 2026-10-02.
Drop-in alternatives for PIC32MX350F256L-I/TL — 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 PIC32MX350F256L-I/TL (same form factor and footprint) — differing in ADC, Core Architecture, Operating Temperature, Operating Voltage Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX360F256L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX360F512L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX460F256L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX575F256L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX470F256L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256L-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX350F256L-I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (32-bit) |
| Maximum CPU Frequency | 80 MHz |
| Program Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| USB Interface | USB 2.0 Full-Speed OTG with on-chip PHY |
| I2C Modules | 2 |
| SPI / I2S Modules | 2 (SPI with I2S support) |
| UART Modules | 6 |
| ADC | 10-bit, up to 16 channels, 1 Msps |
| Analog Comparators | 2 |
| 16-bit Timers | 5 |
| Package | 124-pin VTLA (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial, 'I') |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Programming/Debug Interface | 4-wire JTAG, 2-wire ICSP |
PIC32MX350F256L-I/TL 124-pin vtla (9x9 mm) with exposed pad Pin Configuration Guide
Pin configuration for PIC32MX350F256L-I/TL (124-pin vtla (9x9 mm) with exposed pad 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 PIC32MX350F256L-I/TL.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX350F256L-I/TL is suitable for 6 applications: USB Human Interface Devices (HID, CDC, MSD), Low-Cost Audio Playback with I2S DACs, Graphics TFT Panels with Parallel PMP, Capacitive-Touch Keypads (mTouch), Industrial Sensor Hub with USB Diagnostics, Data Logger with USB Mass Storage.
USB Human Interface Devices (HID, CDC, MSD)
The PIC32MX350F256L-I/TL is well suited to USB HID/CDC/MSD devices because it integrates USB 2.0 Full-Speed OTG with on-chip PHY and 64 KB SRAM, removing the need for an external PHY. The 80 MHz MIPS M4K core processes HID reports and CDC echo with sub-millisecond latency, and the 256 KB Flash holds USB stacks plus application logic. Place 33 ohm series resistors on D+/D- within 5 mm of the package and provide a clean 48 MHz PLL clock for jitter-free USB signalling.
Recommended
Low-Cost Audio Playback with I2S DACs
The PIC32MX350F256L-I/TL's two SPI/I2S modules drive external I2S DACs for 44.1 kHz / 48 kHz stereo playback with deterministic DMA underruns. With 80 MHz MIPS performance and 64 KB SRAM, the device can buffer 16-bit stereo without CPU stalls and still leave headroom for UI code. Microchip's MPLAB Harmony I2S driver simplifies configuration. Use an external low-jitter crystal for accurate audio clock regeneration, and route I2S lines as length-matched 50 ohm traces.
Recommended
Graphics TFT Panels with Parallel PMP
The PIC32MX350F256L-I/TL's Parallel Master Port (PMP) drives 8/16-bit TFTs up to QVGA (320x240) at 30+ FPS while the M4K core runs the graphics library. 256 KB Flash stores image assets and fonts, while 64 KB SRAM holds the frame buffer or partial buffer. The PPS (Peripheral Pin Select) routes data and control lines flexibly to the connector. Use series resistors and a ground guard on PMP data lines to keep EMI low on the long flat-flex cable.
Recommended
Capacitive-Touch Keypads (mTouch)
The PIC32MX350F256L-I/TL integrates Microchip's mTouch capacitive-touch peripheral with up to 16 channels, supporting through-glass keypads and proximity sensors in industrial controls. The M4K core runs the CVD scanning loop and post-filter while leaving spare bandwidth for USB or LCD. Drive the shield electrode from a PWM output to reject moisture and humidity. Use guard rings and ground flood around touch pads to suppress noise coupling.
Recommended
Industrial Sensor Hub with USB Diagnostics
The PIC32MX350F256L-I/TL aggregates analog and digital sensors over I2C/SPI/UART and exposes diagnostics over USB CDC, making it ideal as a USB-attached sensor hub for factory test or maintenance. The 10-bit ADC, 16-channel analog comparator, and PPS simplify PCB routing, while 256 KB Flash holds application code plus Microchip's USB stacks. Industrial -40 C to +85 C operation matches factory floors.
Recommended
Data Logger with USB Mass Storage
The PIC32MX350F256L-I/TL logs analog/digital data to SD card via SPI while presenting the SD card as a USB Mass Storage device for drag-and-drop file retrieval. The M4K core sustains FAT file writes while the USB MSD stack runs concurrently, and the 64 KB SRAM buffers I/O. Use a 4.7 µF bulk cap on VDDIO and a ferrite bead on analog supply to keep ADC noise low during heavy file activity.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX350F256L-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX360F256L-I/TL | PIC32MX360F512L-I/TL | PIC32MX460F256L-I/TL | PIC32MX470F256L-I/TL | PIC32MX575F256L-I/TL | PIC32MX440F256L-I/TL |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 124-pin VTLA (9x9 mm) | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same |
| Core Architecture | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 120 MHz | 72 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 512 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB Interface | USB 2.0 FS OTG with on-chip PHY | USB 2.0 FS OTG with on-chip PHY | USB 2.0 FS OTG with on-chip PHY | USB 2.0 FS OTG with on-chip PHY | USB 2.0 FS OTG with on-chip PHY | No USB | USB 2.0 FS OTG with on-chip PHY |
| Operating Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
Key Differentiators
- USB 2.0 Full-Speed OTG with on-chip PHY (vs PIC32MX575F256L-I/TL)
- Lower cost than PIC32MX460 variant with similar peripherals (vs PIC32MX460F256L-I/TL)
- Higher frequency than PIC32MX575 family (vs PIC32MX575F256L-I/TL)
Design Notes
Estimated: The VTLA-124 package has a thermal resistance around 22 C/W (theta_JA) on a 4-layer JEDEC test board. At VDDIO=3.3 V and CPU at 80 MHz driving all peripherals, typical core current is around 35 mA plus peripheral I/O, so total power stays well below 1 W and no external heatsink is required. Solder the exposed thermal pad to a continuous ground pour of at least 25 mm^2 to keep theta_JA low and to provide the lowest inductance return path for high-frequency GPIO switching.
Decouple VDDCORE with a 1 µF X7R ceramic within 5 mm of the pin, and add a 0.1 µF parallel cap to suppress high-frequency noise. Use a 10 µF bulk cap on VDDIO shared with the PLL/VCO. For USB, derive the 48 MHz PLL clock from a 12 MHz or 24 MHz fundamental crystal with accuracy <= 100 ppm so the USB 2.0 Full-Speed timing stays inside the +/-0.25% specification.
Do not leave the exposed thermal pad of the VTLA-124 floating - it must be soldered to a ground pour for both electrical and thermal reasons. The 'I/TL' suffix indicates industrial temperature -40 C to +85 C; ordering the 'V/TL' (extended) variant is unnecessary for most applications and may cost more. Avoid driving USB D+/D- lines longer than 50 mm without series resistors of 33 ohms on each, placed within 5 mm of the IC.
Compliance Information
RoHS/REACH compliance and lead-free finish per Microchip PIC32MX3xx/4xx family datasheet. Halogen-free status not stated in verified data and is set to 'unknown'. Not AEC-Q100 qualified (industrial grade only).