PIC32MX450F256H-120/PT - 32-bit MCU 120MHz 256KB Flash 64-TQFP | Microchip
MPN: PIC32MX450F256H-120/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $9.05 | $90.50 |
| 100 | $7.84 | $784.00 |
| 500 | $6.94 | $3,470.00 |
| 1,000 | $6.15 | $6,150.00 |
PIC32MX450F256H-120/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (SRAM), and integrated peripherals such as timers, communication controllers and analog blocks. PIC32MX parts sit in Microchip's MIPS-based 32-bit line, between the 8-bit PIC16/PIC18 families and the 64-bit MIPS-class parts, and target cost-sensitive embedded designs that need more headroom than 8-bit cores without moving to ARM Cortex-M. The "M4K" pipeline implements a 5-stage MIPS32 release 2 architecture with hardware multiply/divide and DSP-style multiply-accumulate, so the 120 MHz clock yields 150 DMIPS while consuming as little as ~70 mA active.
Key features include two SPI/I2S peripherals for audio or external ADC/DAC streaming, a full-speed USB 2.0 device/host/OTG controller, a 16-channel 10-bit 1 Msps ADC, five 16-bit timers, six UARTs, two I2C modules and an IrDA SIR encoder/decoder. The 64-pin package exposes up to 53 GPIO, the Parallel Master Port (PMP) for graphics or external memory, and CTMU + 5-bit DAC comparators enabling capacitive touch sensing.
Architecturally, the part pairs the MIPS M4K core with a 32 KB instruction cache (prefetched from Flash) and a separate 4 KB RAM cache, which together explain why the 120 MHz core can approach 150 DMIPS despite Flash access times that would otherwise bottleneck execution - the cache pre-loads instructions ahead of demand.
Typical applications include USB audio bridges, HMI panels using PMP-driven LCDs, low-cost digital photo frames, industrial control with CAN-bridge via SPI, motor control with PWM, and USB-CDC class devices. The combination of USB, I2S, and CTMU in a 64-pin TQFP suits compact consumer and industrial hardware.
When designing, ensure VDD/VSS pairs have 0.1 uF ceramic bypass within 5 mm of every supply pin, and provision a 4.7-10 uF bulk cap at the regulator output. Program Flash endurance is rated for a minimum of 1,000 erase/write cycles per sector - reserve EEPROM emulation or wear-leveling if your firmware updates frequently.
This page combines distributor pricing, parametric comparison and drop-in alternative guidance from Microchip's PIC32MX family, plus design notes compiled from the manufacturer datasheet and reference designs.
Drop-in alternatives for PIC32MX450F256H-120/PT — 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 PIC32MX450F256H-120/PT (same form factor and footprint) — differing in ADC, Package, Operating Temperature Range, Architecture, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256HT-120/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256H-120/MR
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX470F512H-120/PT
✅ Drop-In✓ In Stock
$4.7 / Unit
View Datasheet →PIC32MX450F256H-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX350F256H-120/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256H-120/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K (PIC32MX) |
| Architecture | 32-bit RISC, 5-stage pipeline, MIPS32 Release 2 ISA |
| Maximum CPU Clock | 120 MHz |
| DMIPS | 150 DMIPS at 120 MHz |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 65 KB |
| Instruction Cache | 32 KB (Flash prefetch cache) |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| GPIO (max) | 53 |
| ADC | 10-bit, 16 input channels, 1 Msps |
| Analog Comparators | 2 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| SPI / I2S | 2 peripherals |
| UART | 6 |
| I2C | 2 |
| DMA Channels | 6 |
| Timers | 5 x 16-bit |
| Parallel Master Port (PMP) | Yes |
| CTMU | Yes (for capacitive touch) |
| IrDA | SIR encoder/decoder |
| Flash Endurance | 1,000 erase/write cycles minimum per sector |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited floor life for TQFP-64) |
PIC32MX450F256H-120/PT 64-pin tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for PIC32MX450F256H-120/PT (64-pin tqfp (10x10 mm) 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 PIC32MX450F256H-120/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F256H-120/PT is suitable for 6 applications: USB Audio Bridge (USB Speaker/Headset), HMI / Graphical LCD Panel, Industrial Motor Control (BLDC/PMSM), USB CDC / HID Data Acquisition Device, Capacitive Touch Control Panel, Low-Cost Digital Photo Frame / Consumer Media Player.
USB Audio Bridge (USB Speaker/Headset)
The PIC32MX450F256H-120/PT fits USB audio bridges because it pairs a USB 2.0 Full-Speed OTG controller with two independent I2S peripherals and a 10-bit 1 Msps ADC capable of streaming at 48 kHz/16-bit stereo. With the MIPS M4K core at 120 MHz delivering 150 DMIPS, the device handles USB isochronous frame scheduling plus DSP-style sample rate conversion without external logic. Compared with discrete USB + CODEC solutions, integrating USB, I2S and the audio clock domain in one die shrinks BOM and EMI footprint. Microchip's MPLAB Harmony USB Audio class driver reference firmware demonstrates a complete isochronous USB speaker implementation using the on-chip peripherals.
Recommended
HMI / Graphical LCD Panel
The PIC32MX450F256H-120/PT is well suited to HMI panels because the on-chip Parallel Master Port (PMP) drives 8080/6800 parallel LCDs up to QVGA resolution directly, while the 120 MHz core renders screens fast enough for animated icons and touch feedback. The CTMU enables projected-capacitive or matrix-key touch sensing, and 65 KB SRAM holds double-buffered frame chunks for QVGA displays. Designers typically pair the part with a 4.3-inch TFT, an external SDRAM for full-frame buffering, and Microchip's free Graphics Object Layer stack.
Recommended
Industrial Motor Control (BLDC/PMSM)
The PIC32MX450F256H-120/PT drives BLDC and PMSM motors thanks to its five 16-bit timers with PWM outputs, the 10 Msps capable PWM module, six DMA channels that offload sample transfer, and a 10-bit ADC with 16 channels for back-EMF and current sensing. The 120 MHz MIPS M4K core executes Field-Oriented Control loops at 20 kHz PWM with margin for sensorless estimators. The 2.3-3.6 V supply range simplifies integration with 3.3 V gate drivers like Microchip's MCP8021/2/3 BLDC gate-driver companion chips.
Recommended
USB CDC / HID Data Acquisition Device
Engineers use the PIC32MX450F256H-120/PT as a USB CDC or HID data-acquisition front end because the USB Full-Speed controller enumerates as a virtual COM port or HID device without external PHY, while the 1 Msps ADC with 16 channels streams sensor data over USB isochronous or interrupt endpoints. The 120 MHz core handles 1 kHz waveform streaming plus on-chip DSP filters, and 65 KB SRAM buffers multi-channel bursts. Microchip's MLA USB stack includes ready-to-port CDC class firmware that runs from boot Flash.
Recommended
Capacitive Touch Control Panel
The PIC32MX450F256H-120/PT's Charge Time Measurement Unit (CTMU) plus 5-bit DAC enables projected-capacitive and matrix-key touch sensing on up to 32 channels without an external touch controller. The MIPS M4K core at 120 MHz runs the Microchip mTouch library, scanning, debouncing and gesture recognition in real time. Designers typically pair the MCU with an I2C-driven LCD, achieving a single-chip touch + display controller under 4 mA active.
Recommended
Low-Cost Digital Photo Frame / Consumer Media Player
The PIC32MX450F256H-120/PT's combination of PMP for LCD, USB host for flash drives, two I2S for stereo audio, and the 120 MHz MIPS M4K for JPEG decode makes it a viable single-chip brain for low-cost digital photo frames. Per the Microchip PIC32MX reference designs, the part streams JPEG bitmaps from a USB thumb drive to a QVGA TFT at 15+ fps while playing background audio through an I2S DAC. The 256 KB Flash holds the firmware plus a small UI library, while 65 KB SRAM buffers decoded frames.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256H-120/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256HT-120/PT | PIC32MX450F256H-120/MR | PIC32MX470F512H-120/PT | PIC32MX450F256H-I/PT | PIC32MX440F256H-80I/PT | PIC32MX350F256H-120/PT |
|---|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-QFN (9x9 mm) - footprint change required | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 80 MHz | 80 MHz | 120 MHz |
| Program Flash | 256 KB | 256 KB | 256 KB | 512 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 65 KB | 65 KB | 65 KB | 128 KB | 65 KB | 65 KB | 65 KB |
| USB | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG |
| I2S | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Highest CPU clock (120 MHz) in the PIC32MX3/4 256KB family (vs PIC32MX440F256H-80I/PT)
- Two I2S peripherals in same 64-pin TQFP (vs PIC32MX350F256H-120/PT)
- Drop-in 100% functional compatibility with PIC32MX450F256HT-120/PT (vs PIC32MX450F256HT-120/PT)
- Pin-compatible upgrade path to 512 KB Flash / 128 KB SRAM (vs PIC32MX470F512H-120/PT)
Design Notes
Place a 10 uF bulk ceramic plus 0.1 uF decoupling capacitor within 5 mm of every VDD/VSS pin pair. The PIC32MX450F256H-120/PT draws up to 70 mA active at 120 MHz with USB active, so the regulator must source at least 100 mA with low noise (LT3042/LT3045 or similar). Tie the ENVREG pin to VDD to enable the internal 1.8 V core regulator; tie to VSS only if an external 1.8 V is provided.
Estimated: at 120 MHz and full GPIO toggling, core power is roughly 0.6 W. The 64-pin TQFP package has theta_JA around 50 C/W on a 4-layer JEDEC board, so junction rise is ~30 C above ambient. Industrial -40 C to +85 C operation is feasible without a heatsink, but USB + I2S + ADC continuous operation can push die temp 15 C higher. Provide a copper pour under the EP flag and stitched thermal vias if the design is enclosed.
Route the 48 MHz USB clock traces as 90-ohm differential pairs (D+/D-) with length matching within 2 mm. Keep the VUSB supply trace short and isolated; place a 0.1 uF + 4.7 uF cap at the VUSB pin. Route the PMP data/control bus to the LCD in matched-length groups to avoid skew above 8 ns for QVGA panels. Avoid routing digital signals under the analog AVSS/AVDD pins to prevent ADC noise coupling.
Do not exceed 3.6 V on any I/O pin; the 5V-tolerant feature does not exist on PIC32MX. Configure unused GPIO as outputs driven low to minimize current draw. When using USB host mode, supply VBUS with a soft-start circuit - hot-plug events can latch the part if VBUS rises faster than 100 us. Flash endurance is rated at 1,000 erase/write cycles per sector, so wear-level critical parameters across multiple sectors for EEPROM emulation.
Place the 12 MHz external crystal or 48 MHz oscillator as close as possible to OSCI/OSCO with the load capacitors within 5 mm of the pins. Use a ground ring around the crystal to isolate EMI. For ADC accuracy, route analog inputs away from PWM outputs and the switching node of any DC-DC converter on the same PCB. Place the CTMU reference resistor (typically 10k) close to the CTMU pin to minimize parasitic capacitance on capacitive touch measurements.
Compliance Information
RoHS/REACH compliant per Microchip product page. The /PT suffix denotes lead-free TQFP. Not AEC-Q100 qualified; for automotive designs choose PIC32MX variants with explicit -V grade and Q100 qualification.
