PIC32MX450F256LT-120/PF
PIC32MX450F256LT-120/PF - 120 MHz 32-bit MCU 256KB Flash | Microchip
The Microchip Technology PIC32MX450F256LT-120/PF is a 32-bit MIPS M4K PIC microcontroller running at 120 MHz with 256 KB of Flash and 64 KB of SRAM in a 100-pin TQFP (14x14 mm) package. It integrates USB 2.0 full-speed, two analog comparators, CTMU (Charge Time Measurement Unit), RTCC, and the rich peripheral set of the PIC32MX3/4 family.
A 32-bit microcontroller (MCU) is an embedded processor whose data path, registers and arithmetic logic unit are 32 bits wide, enabling higher code density, larger addressable memory, and more efficient handling of complex math than 8- or 16-bit cores. The PIC32MX family in particular uses the MIPS M4K core with single-cycle hardware multiply/divide, dual-issue pipeline and tightly coupled peripherals, sitting in the broader taxonomy MCU -> embedded processor -> semiconductor. The PIC32MX3/4 sub-family targets cost-sensitive applications needing 32-bit performance with low power and a wide peripheral mix.
Key features include 120 MHz / 150 DMIPS core performance, 256 KB self-programmable Flash, 64 KB SRAM, USB 2.0 full-speed OTG with on-chip transceiver, up to 5 timers, 4 DMA channels, two I2S/SPI modules, two I2C modules, two UART modules, two analog comparators, CTMU for capacitive touch and high-resolution time measurement, and a Real-Time Clock/Calendar (RTCC). The 100-pin TQFP exposes up to 83 I/O pins, supporting large parallel buses or many simultaneous interfaces.
Architecturally the device combines a Harvard-class MIPS M4K core with Microchip's peripheral DMA engine, allowing data movement between peripherals and memory without CPU intervention - ideal for USB isochronous audio or continuous ADC streaming. The integrated 3.3V core, 2.5-3.6V operating range and on-chip voltage regulator simplify board design, while the CTMU and dedicated RTCC enable time-stamped data logging and low-power calendar mode.
Typical applications include USB peripherals (HID, CDC, MSD, audio class), capacitive-touch user interfaces, industrial control panels, dataloggers with calendar timestamping, motor control front-ends, embedded audio I/O and consumer products needing USB connectivity. The combination of USB OTG, CTMU touch and 256 KB Flash covers most mid-range connected-embedded designs in a single chip.
When designing with this MCU, provide a stable 8 MHz crystal or oscillator and respect the 2.5-3.6V VDD range; USB operation requires a 48 MHz internal PLL-derived clock and the on-chip USB transceiver, so external PHY components are unnecessary. Always check the device errata before committing to a final BOM, as the PIC32MX4 family has documented silicon revisions.
This page synthesizes distributor pricing from 7 sources, drop-in alternatives within the same PIC32MX4 family and comparable footprint, and practical design notes that go beyond the manufacturer datasheet summary to support engineering and procurement decisions.
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