PIC32MX450F256HT-V/MR
PIC32MX450F256HT-V/MR - 80MHz 32-bit MCU 256KB Flash | Microchip
The Microchip Technology PIC32MX450F256HT-V/MR is a 32-bit MIPS32 M4K microcontroller operating at up to 80 MHz, integrating 256 KB of Flash program memory and 64 KB of SRAM into a 64-pin QFN (MR) 9x9 mm package with an exposed thermal pad. The device targets cost-sensitive embedded designs that require deterministic performance, a rich peripheral set, and a compact surface-mount footprint. It supports a 2.3 V to 3.6 V core supply and integrates features such as a 10-bit 1 Msps ADC, multiple UART/SPI/I2C interfaces, and a USB 2.0 full-speed controller.
A 32-bit microcontroller (MCU) is a microprocessor core that fetches, decodes, and executes instructions with 32-bit data paths, enabling higher throughput, larger address spaces, and richer data types than 8-bit or 16-bit alternatives. The PIC32MX family belongs to the MIPS architecture lineage and combines M4K core performance with Microchip's PIC ecosystem of development tools, libraries, and application notes. The 80 MHz / 150 DMIPS rating places this device in the mid-range of the PIC32 portfolio, sitting between the lower-pin PIC32MX1/2 families and the higher-end PIC32MX5/6/7 families.
Key features of the PIC32MX450F256HT-V/MR include 256 KB of self-programmable Flash, 64 KB of SRAM, hardware real-time clock-calendar, a 16-bit timer/counter module, two I2S/SPI peripherals, two I2C ports, two analog comparators, five 16-bit timers, and a 10-bit 1 Msps analog-to-digital converter with up to 28 input channels. The integrated USB 2.0 full-speed device/host/OTG controller and CAN 2.0B module simplify connectivity designs. The -V temperature suffix denotes -40C to +105C operating range, suitable for industrial environments.
The PIC32MX450F256H die is built on a mature CMOS process, optimized for low active power and peripheral integration, allowing the QFN-64 footprint to dissipate up to 1 W with proper PCB thermal management. The internal PLL multiplies an external crystal or oscillator up to the 80 MHz core clock. The peripheral bus matrix provides deterministic DMA paths between the ADC, UART, SPI, I2C, and USB modules, supporting applications that require deterministic interrupt latency.
Typical applications include industrial automation controllers, USB human-interface devices (HID), CAN-based automotive body modules, point-of-sale terminals, and low-cost graphics terminals with parallel-master LCD driving. Engineers select this part when balancing cost, 32-bit performance, and Microchip's MPLAB X toolchain, especially in QFN form factor-constrained PCBs where the 9x9 mm package footprint is acceptable.
When designing with the PIC32MX450F256HT-V/MR, ensure the exposed pad is soldered to a sufficient ground copper pour for thermal dissipation, and provide adequate decoupling (typically 0.1 uF and 1 uF) near each VDD/VSS pair. For USB applications, the internal 3.3 V LDO and D+ pull-up resistor simplify hardware, but the PCB layout must follow USB 2.0 high-speed signal-integrity practices.
This page synthesizes Microchip datasheet parameters, distributor pricing from DigiKey and Mouser, and drop-in same-package alternatives drawn from the PIC32MX family - information gain not duplicated in raw datasheet excerpts.
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