PIC32MX450F256LT-120/PF - 120 MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX450F256LT-120/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.45 | $9.45 |
| 10 | $8.51 | $85.10 |
| 100 | $7.55 | $755.00 |
| 500 | $6.83 | $3,415.00 |
| 1,000 | $6.12 | $6,120.00 |
PIC32MX450F256LT-120/PF Overview
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.
Drop-in alternatives for PIC32MX450F256LT-120/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 PIC32MX450F256LT-120/PF (same form factor and footprint) — differing in Package, ADC, Core Architecture, SRAM, Program Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256L-120/PF
✅ Drop-In✓ In Stock
$6.48 / Unit
View Datasheet →PIC32MX450F256LT-120I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256LT-120V/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256L-I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256H-80I/MR
✅ Drop-In✓ In Stock
$5.35 / Unit
View Datasheet →PIC32MX430F064L-I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256LT-120/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 120 MHz |
| Performance | 150 DMIPS |
| Program Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage | 2.5 V to 3.6 V |
| Package | 100-pin TQFP (14x14 mm), suffix /PF |
| Pin Count | 100 |
| I/O Pins | Up to 83 |
| USB | USB 2.0 Full-Speed OTG with on-chip transceiver |
| Analog Comparators | 2 |
| CTMU | Yes (Capacitive Touch / Time Measurement) |
| RTCC | Yes (Real-Time Clock/Calendar) |
| DMA Channels | 4 |
| Timers | 5 (16-bit, configurable) |
| UART | 2 |
| SPI / I2S | 2 SPI, 2 I2S-capable |
| I2C | 2 |
| Temperature Range | -40C to +85C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX450F256LT-120/PF 100-pin tqfp (14x14 mm), suffix /pf Pin Configuration Guide
Pin configuration for PIC32MX450F256LT-120/PF (100-pin tqfp (14x14 mm), suffix /pf 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 PIC32MX450F256LT-120/PF.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F256LT-120/PF is suitable for 6 applications: USB HID / CDC / MSD Peripherals, Capacitive Touch User Interface, Industrial Datalogger with Calendar Timestamping, Embedded Audio I/O with I2S, Motor Control Front-End (BLDC / Stepper), USB-Connected Consumer / IoT Gateway.
USB HID / CDC / MSD Peripherals
The PIC32MX450F256LT-120/PF's integrated USB 2.0 full-speed OTG controller with on-chip transceiver makes it ideal for USB peripherals such as custom HID input devices, CDC virtual COM ports, and MSD mass-storage readers. At 120 MHz the MIPS32 M4K core runs Microchip's USB stack and application tasks concurrently without CPU stalls, while 64 KB SRAM holds descriptor tables and double-buffered endpoint FIFOs. The PIC32MX4 datasheet confirms up to 8 USB endpoints and full OTG role-swap support, so designers can implement host or device roles on the same PCB. Compared with adding an external FTDI bridge, the on-chip USB reduces BOM cost, board area, and BOM risk for low- to mid-speed consumer peripherals.
Recommended
Capacitive Touch User Interface
The PIC32MX450F256LT-120/PF's integrated CTMU (Charge Time Measurement Unit) and 83 GPIO pins make it a strong fit for capacitive-touch keypads, sliders, and proximity sensors in appliances and industrial control panels. The CTMU provides sub-nanosecond resolution for capacitive delta-sigma measurements, and the 120 MHz core runs Microchip's mTouch library with reliable debounce and water-tolerant algorithms. Designers can drive dozens of touch electrodes directly from the TQFP-100 footprint, eliminating the cost of a dedicated touch controller. The same silicon also supports the RTCC for timestamping operator actions in datalogged systems.
Recommended
Industrial Datalogger with Calendar Timestamping
The PIC32MX450F256LT-120/PF is well matched to industrial dataloggers thanks to its 256 KB Flash for storing configuration and event logs, 64 KB SRAM for buffering sampled data, and on-chip RTCC that keeps wall-clock time during main-power loss via an external 32.768 kHz crystal. The 4 DMA channels move ADC or sensor samples to RAM without CPU intervention, leaving the MIPS M4K core free to compress, packetize, and timestamp entries. The 100-pin TQFP package accommodates parallel LCD or SD-card interfaces common in field-installed dataloggers. This combination delivers a single-chip solution for battery-backed, time-correlated data acquisition in process and environmental monitoring.
Recommended
Embedded Audio I/O with I2S
The PIC32MX450F256LT-120/PF's two I2S-capable SPI peripherals and 4-channel DMA let designers implement stereo audio input/output without an external codec controller. Operating at 120 MHz, the MIPS M4K core has enough headroom to run audio sample-rate conversion and basic DSP alongside the USB audio class stack, useful for USB headsets, intercoms, and audio bridges. The CTMU can also be repurposed as a software timer for LED VU-meter feedback. With 64 KB SRAM, the part holds a few hundred milliseconds of audio buffering at common 48 kHz / 16-bit rates, simplifying BOM and shrinking PCB footprint versus MCU + external DSP designs.
Recommended
Motor Control Front-End (BLDC / Stepper)
The PIC32MX450F256LT-120/PF's 120 MHz core, five 16-bit timers and two analog comparators provide a complete front-end for small BLDC and stepper motor controllers in appliances, fans, and robotics. The 4-channel DMA supports back-EMF sampling without CPU load, while the 100-pin TQFP exposes PWM outputs, quadrature encoder inputs, and analog feedback signals without external multiplexers. With 256 KB Flash, designers can fit sensorless BLDC algorithms plus a USB diagnostics interface for field tuning on the same silicon. Compared with a dedicated motor-control MCU, this part offers more general-purpose compute and connectivity at comparable cost.
Recommended
USB-Connected Consumer / IoT Gateway
The PIC32MX450F256LT-120/PF is a strong fit for USB-connected consumer products and IoT gateways such as smart-home bridges, fitness dongles, and config tools. Its USB OTG peripheral lets the device act as a host (managing mass storage or HID peripherals) or as a device tethered to a phone, while the CTMU supports on-product capacitive buttons. At 120 MHz the MIPS M4K core runs Microchip's TCP/IP stacks via the on-chip Ethernet-less architecture by tunneling over USB RNDIS/ECM, and 256 KB Flash accommodates full firmware with room for OTA-style bootloader reflows. The 100-pin TQFP and 2.5-3.6V operation also simplify battery-powered designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256LT-120/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256L-120/PF | PIC32MX450F256LT-120I/PF | PIC32MX450F256LT-120V/PF | PIC32MX450F256L-I/PF | PIC32MX440F256H-80I/MR | PIC32MX430F064L-I/PF |
|---|---|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 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 | TQFP-100 (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum CPU Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 80 MHz | 80 MHz | 50 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 64 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB |
| USB OTG | Yes (USB 2.0 FS, on-chip transceiver) | Yes (USB 2.0 FS, on-chip transceiver) | Yes (USB 2.0 FS, on-chip transceiver) | Yes (USB 2.0 FS, on-chip transceiver) | Yes (USB 2.0 FS, on-chip transceiver) | No USB on this PIC32MX440 sub-family variant | Yes (USB 2.0 FS, on-chip transceiver) |
| Temperature Range | 0C to +85C (commercial) | 0C to +85C (commercial) | -40C to +85C (industrial) | -40C to +105C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
Key Differentiators
- Higher CPU clock with identical Flash/RAM footprint (vs PIC32MX450F256L-I/PF)
- Full PIC32MX4 peripheral set retained (vs PIC32MX430F064L-I/PF)
- Integrated USB OTG with on-chip transceiver (vs PIC32MX440F256H-80I/MR)
Design Notes
The PIC32MX450F256LT-120/PF operates from 2.5 V to 3.6 V with internal 1.8 V core regulation; place a 10 uF bulk plus 100 nF decoupling capacitor on each VDD/VSS pair within 5 mm of the package. Use a dedicated 3.3V LDO (e.g., AP2112K-3.3 or MCP1700) rather than sharing a noisy rail with relays or motors, because the on-chip USB PLL is sensitive to VDD ripple above 50 mVpp. Verify the supply rise time is monotonic and below the datasheet's POR threshold; otherwise the on-chip voltage regulator can latch in an indeterminate state.
Route the 12 MHz primary crystal (or resonator) within 5 mm of the OSCI/OSCO pins and guard it with a ground pour to keep USB PLL jitter under control. Keep the USB D+/D- traces matched to 45 ohm impedance, 90 ohm differential, and as short as practical; place the ESD array (USBLC6-2SC6 or similar) at the connector side. The TQFP-100 has 83 GPIO pins, so route the parallel bus or LCD signals on inner layers with the ground plane directly below to control crosstalk.
Always read the device errata before committing to a final BOM: the PIC32MX4 family has documented silicon revisions affecting USB module behavior and CTMU calibration. Do not assume PIC32MX5 firmware builds run unchanged on PIC32MX4 silicon because the peripheral base addresses differ. The L-, LT-, H- and HT- suffixes indicate Flash/SRAM size and temperature grade but not CPU speed - confirm the 120 MHz speed grade is selected (PIC32MX...-120) if USB full-speed operation is required, since 80 MHz and 50 MHz variants cannot lock the 48 MHz USB clock.
The 100-pin TQFP exposes a center thermal pad that must be soldered to a copper pour (at least 1 cm x 1 cm) tied to ground for thermal relief and EMI. Place bypass capacitors on the inner-row power pins first, then on the outer pins, keeping the loop area under 2 mm x 2 mm for the high-di/dt USB and PWM outputs. Avoid routing GPIO signals under the crystal traces to prevent capacitive load drift.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 is not applicable - this is a general-purpose MCU without automotive grade qualification; choose PIC32MX...-V/PF or -I/PF variants for industrial / extended-temp applications.
