PIC32MX450F256L-120/PT
PIC32MX450F256L-120/PT - 120MHz 32-bit MCU, 256KB Flash, USB | Microchip
The Microchip Technology PIC32MX450F256L-120/PT is a 32-bit MIPS MCU from the PIC32MX3/4 family that combines 120 MHz / 150 DMIPS performance with 256 KB Flash and 64 KB SRAM, integrated USB 2.0 Full-Speed OTG, two I2S/SPI modules, Peripheral Pin Select (PPS), a Parallel Master Port (PMP), and a Charge Time Measurement Unit (CTMU), all in a 100-pin TQFP (12x12 mm) package.
A 32-bit microcontroller is a programmable system-on-chip that integrates a CPU core, memory, and peripherals on a single die; the PIC32MX4 series uses the MIPS32 M4K core, which executes most instructions in one cycle and supports the standard MIPS instruction set, giving it an order-of-magnitude performance advantage over 8-bit/16-bit MCUs while remaining low cost. Within the broader taxonomy, PIC32MX devices sit in Microchip's PIC32 line under the MCU -> microcontroller -> embedded controller -> semiconductor hierarchy, and they target cost-sensitive designs that still need rich peripherals.
Key features include 120 MHz / 150 DMIPS core speed, 256 KB Flash (256K x 8), 64 KB SRAM, 2 analog comparators, two I2S/SPI modules for codec and serial communications, USB 2.0 Full-Speed OTG controller, Peripheral Pin Select (PPS) for flexible pin mapping, Parallel Master Port (PMP) for graphics interfaces, Charge Time Measurement Unit (CTMU) for touch and capacitive sensing, Real-Time Clock and Calendar (RTCC), and a wide operating temperature range of -40C to +105C.
The PIC32MX450F256L-120/PT uses a 5-stage pipeline MIPS32 M4K core running at up to 120 MHz with a single-cycle multiply, hardware divider, and tightly-coupled peripheral bus; the 2.3V-3.6V supply range simplifies design on either 3.3V regulated rails or 2xAA battery stacks, and the on-chip 80 MHz ADC (1 Msps, 10/12-bit) supports precision mixed-signal applications without an external ADC.
Typical applications include USB peripherals (HID, CDC, mass storage), audio interfaces that benefit from the two I2S modules, HMI/touch panels using the CTMU and PMP for LCDs, industrial control nodes, and consumer devices needing graphics (e.g., a small TFT). For USB audio or graphics HMI, the part's integrated USB OTG and PMP eliminate the need for external bridge chips, reducing BOM cost.
When designing with this part, note that the 100-pin TQFP requires adequate PCB real estate and that PPS remapping must be performed at startup in software; for USB designs, the 48 MHz clock accuracy directly determines USB compliance, so use a crystal rather than an internal RC where certification matters. The CTMU needs careful calibration but delivers reliable touch sensing once configured.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in a single manufacturer datasheet.
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