PIC32MX450F256HT-I/PT - 80MHz 256KB Flash 32-bit MCU | Microchip
MPN: PIC32MX450F256HT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.13 | $71.30 |
| 100 | $6.02 | $602.00 |
| 500 | $5.41 | $2,705.00 |
| 1,000 | $4.85 | $4,850.00 |
PIC32MX450F256HT-I/PT Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program and data memory, timers, communication peripherals, and I/O. The PIC32MX450 belongs to the broader taxonomy of microcontroller -> 32-bit MCU -> MIPS architecture MCU -> PIC32 family. Compared with 8-bit and 16-bit MCUs, the 32-bit core executes instructions on 32-bit data paths and supports larger address spaces, enabling richer connectivity stacks, RTOS use, and graphical user interfaces. The 32-bit class also dominates portable medical, IoT gateways, audio, and motor-control segments where headroom matters.
Key features include 256 KB single-voltage Flash with live update support, 64 KB SRAM, 5 timers, 5 PWM channels, 2 analog comparators, 2 I2C, 2 SPI/I2S, 4 UART, and a 10-bit ADC with up to 28 input channels at 1 Msps. The device operates from 2.3 V to 3.6 V and supports industrial -40C to +85C ambient conditions. The 64-pin TQFP (10x10 mm) exposes 49 GPIO pins, leaving headroom for parallel buses or large pin-count peripherals.
The PIC32MX450 implements the MIPS32 M4K core with single-cycle hardware multiply/divide and a 5-stage pipeline, giving 1.56 DMIPS/MHz. Its peripheral set includes a Parallel Master Port (PMP) for external memory or graphics, a 16-bit Parallel Slave Port, and a charge-time-measurement-unit (CTMU) for capacitive touch and sensor timing. Code security is supported via Flash OTP and on-chip debugging over the proprietary ICSP/ICD interface using MPLAB X IDE and Harmony.
Typical applications include industrial control (sensor hubs, simple HMIs, PLC peripherals), consumer audio and low-cost graphical interfaces, IoT edge nodes with Ethernet or Wi-Fi via SPI-attached transceivers, portable medical peripherals, and automotive body-electronics sub-modules (HVAC, lighting controllers). The wide operating voltage and integrated 10-bit ADC simplify analog signal conditioning for sensor-rich designs.
When designing with this part, place 0.1 uF + 10 uF bulk decoupling close to each VDDCORE/VDD pair, route the 8 MHz primary oscillator traces short with a guarded ground, and use MPLAB X with a PICkit or ICD debugger during bring-up. For 5 V-tolerant inputs, use external level shifters - the part is NOT 5 V tolerant on digital I/O.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC32MX family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC32MX450F256HT-I/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 PIC32MX450F256HT-I/PT (same form factor and footprint) — differing in Package, ADC, Parallel Master Port (PMP), Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256HT-I/MR
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC32MX450F256HT-120I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256H-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256HT-80I/PT
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC32MX250F256HT-I/PT
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC32MX370F512LT-I/PT
✅ Drop-In✓ In Stock
$5.75 / Unit
View Datasheet →PIC32MX450F256HT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 80 MHz (83 DMIPS) |
| Program Memory (Flash) | 256 KB |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| GPIO Count | 49 |
| ADC | 10-bit, 28 channels, 1 Msps |
| Timers | 5 |
| PWM Channels | 5 |
| Analog Comparators | 2 |
| UART | 4 |
| SPI / I2S | 2 / 2 |
| I2C | 2 |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 64-pin TQFP (PT), 10x10 mm, 0.5 mm pitch |
| Mounting Type | Surface Mount |
| AEC-Q100 | Grade 3 qualified |
| RoHS Status | Compliant |
PIC32MX450F256HT-I/PT 64-pin tqfp (pt), 10x10 mm, 0.5 mm pitch Pin Configuration Guide
Pin configuration for PIC32MX450F256HT-I/PT (64-pin tqfp (pt), 10x10 mm, 0.5 mm pitch 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 PIC32MX450F256HT-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F256HT-I/PT is suitable for 6 applications: Industrial IoT Gateway, Low-Cost Graphical HMI, Portable Medical Peripheral, Automotive Body Electronics, Consumer Audio DSP, Smart Sensor Hub.
Industrial IoT Gateway
The PIC32MX450F256HT-I/PT is well matched to industrial IoT gateway nodes where 256 KB Flash holds a full TLS stack plus MQTT client and 64 KB SRAM runs lwIP TCP/IP with comfortable headroom. Operating from 2.3 V to 3.6 V across -40C to +85C ambient, the part survives factory floor conditions. Designers typically pair the MCU with an SPI-attached ENC28J60 Ethernet transceiver or an MRF24WG0MA Wi-Fi module; the 80 MHz / 83 DMIPS throughput is sufficient for sensor aggregation, local Modbus RTU polling over UART, and secure cloud uplink. The 49 GPIO lines accommodate multiple sensor buses plus a Parallel Master Port driving an external TFT for HMIs.
Recommended
Low-Cost Graphical HMI
For graphical HMI panels in appliances, simple kiosks, and consumer electronics, the PIC32MX450F256HT-I/PT drives small TFT LCDs via its integrated Parallel Master Port (PMP), supporting 8-bit or 16-bit bus widths up to the 80 MHz system clock. The 256 KB Flash accommodates graphics libraries plus fonts, while the 64 KB SRAM holds a framebuffer for 320x240 QVGA displays. Microchip's free MPLAB Harmony Graphics Suite provides ready-to-use widgets, drivers, and touch integration through the on-chip CTMU. The 5 PWM channels can drive backlight brightness directly through an external MOSFET.
Recommended
Portable Medical Peripheral
The PIC32MX450F256HT-I/PT is a fit for portable medical peripherals such as pulse oximeters, glucose meter base stations, and handheld diagnostic tools where 32-bit processing is needed for DSP filtering or sensor calibration. The 10-bit 1 Msps ADC captures photodiode or electrode signals with sufficient dynamic range for many clinical sensors, and the CTMU provides stable current sources for ratiometric measurement. The wide 2.3 V to 3.6 V supply range lets designers power the MCU directly from a single Li-ion cell with an LDO. The -40C to +85C industrial temperature range supports use in ambulances and clinical environments.
Recommended
Automotive Body Electronics
In automotive body-electronics sub-modules (HVAC blend-door controllers, lighting modules, seat controllers) the PIC32MX450F256HT-I/PT delivers the right balance of processing power, AEC-Q100 Grade 3 qualification, and integration. The 64-pin TQFP package is friendly to automotive PCB assembly, and the 5 PWM channels drive LED arrays, motor bridges, or solenoids directly. The 4 UARTs multiplex LIN, K-Line, and debug traffic; 2 CAN is not integrated, so external MCP2515/MCP25625 transceivers handle the CAN bus. The 256 KB Flash supports AUTOSAR-lite stacks and bootloader schemes needed for OEM end-of-line programming.
Recommended
Consumer Audio DSP
Consumer audio products such as Bluetooth speakers, soundbars, and digital mixers benefit from the PIC32MX450F256HT-I/PT's 80 MHz / 83 DMIPS throughput, which runs audio sample-rate DSP (EQ, dynamics, mixing) at 48 kHz stereo with overhead for the I2S/USB audio streams. The 2 I2S ports support simultaneous input and output paths, while 2 SPI handles Flash memory and codec control. The 10-bit ADC is adequate for auxiliary potentiometers or VU-meter sensing. The 256 KB Flash holds effects libraries plus a USB audio class stack, and the part operates from a single 3.3 V rail simplifying power tree design.
Recommended
Smart Sensor Hub
The PIC32MX450F256HT-I/PT integrates a 28-channel 10-bit ADC, 2 analog comparators, 5 timers, and 49 GPIO - enough to act as a centralized smart sensor hub for HVAC, agricultural monitoring, or building automation. The CTMU provides ratiometric measurement for temperature, humidity, and capacitive touch sensors. Designers can aggregate I2C sensors (temperature, pressure, gas), SPI sensors (accelerometer, gyroscope), and analog transducers into a single node that publishes over UART/RS-485 to a higher-level controller. The 64 KB SRAM comfortably buffers sample sets before forwarding.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256HT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256HT-I/MR | PIC32MX450F256HT-120I/PT | PIC32MX450F256H-I/PT | PIC32MX440F256HT-80I/PT | PIC32MX250F256HT-I/PT | PIC32MX370F512LT-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin QFN (MR) - alt package | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | |
| CPU Frequency | 80 MHz (83 DMIPS) | 120 MHz (150 DMIPS) | 80 MHz (83 DMIPS) | 80 MHz (83 DMIPS) | 50 MHz (50 DMIPS) | 80 MHz (83 DMIPS) | |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB | |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB | 128 KB | |
| GPIO | 49 | 49 | 49 | 49 | 49 | 49 | |
| AEC-Q100 | Grade 3 qualified | Grade 1 qualified | Grade 3 qualified | Grade 3 qualified | Grade 3 qualified | Grade 3 qualified |
Key Differentiators
- Single source for 256 KB Flash + 64 KB SRAM at 80 MHz in 64-pin TQFP (vs PIC32MX250F256HT-I/PT)
- 256 KB Flash is a sweet spot in the PIC32MX3/4 lineup (vs PIC32MX370F512LT-I/PT)
- PIC32MX450 family adds CTMU and refined peripheral set (vs PIC32MX440F256HT-80I/PT)
Design Notes
The PIC32MX450F256HT-I/PT requires two supplies - VDDCORE for the internal regulator output (typically 1.8 V) and VDDIO at 2.3 V to 3.6 V. Place a 10 uF bulk capacitor and a 0.1 uF ceramic bypass close to each VDD pin pair; the device datasheet specifies that VDDCORE must be powered before VDDIO or both must rise together. Estimated worst-case current at 80 MHz full peripheral activity is around 70 mA from VDDIO, so budget accordingly in the LDO or DC-DC selection.
Keep the 8 MHz primary oscillator traces under 10 mm and surround them with a grounded copper pour. The 32 kHz secondary oscillator for the RTCC is even more sensitive - place its load capacitors within 2 mm of the SOSCO/SOSCI pins and never route high-frequency traces under them. The ICSP programming pins (PGECx/PGEDx) should be brought out to a 6-pin header or Tag-Connect footprint for in-circuit programming without disturbing the PCB layout.
Digital I/O on the PIC32MX450F256HT-I/PT are NOT 5 V tolerant - applying 5 V to any input will damage the part. Use external level shifters (e.g., TXS0108E) or limit input voltage via resistor dividers when interfacing with 5 V logic. Also, the ADC sample-and-hold requires the acquisition time to be configured for the source impedance; with 5 kohm source impedance, use at least 1 us acquisition time per Microchip errata guidance. Enable the JTAG port lock in the configuration bits if security is required, but be aware that locked devices cannot be debugged again without a full chip erase.
Compliance Information
AEC-Q100 Grade 3 qualified per Microchip product family documentation. RoHS and REACH compliant per DigiKey/Mouser compliance badges as of October 2026.
