PIC32MX450F256LT-I/TL - 80MHz 32-bit MCU 256KB Flash USB | Microchip
MPN: PIC32MX450F256LT-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.4 | $8.40 |
| 10 | $7.65 | $76.50 |
| 100 | $6.92 | $692.00 |
| 500 | $6.3 | $3,150.00 |
| 1,000 | $5.78 | $5,780.00 |
PIC32MX450F256LT-I/TL Overview
What is a 32-bit microcontroller? A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (RAM), and integrated peripherals such as timers, communication controllers, and analog blocks. The PIC32MX450F256L belongs to the 32-bit class, meaning its data path, registers, and arithmetic units are 32 bits wide - enabling higher code density, faster arithmetic, and larger addressable memory than 8-bit or 16-bit MCUs. Within Microchip's portfolio it sits in the PIC32MX family, which uses the MIPS32 M4K core and targets cost-sensitive embedded applications.
Key features of the PIC32MX450F256LT-I/TL include two SPI/I2S ports, two I2C ports, two UART/USART blocks, two analog comparators, a 10-bit ADC with up to 28 input channels, a Parallel Master Port (PMP), and a USB OTG full-speed transceiver. The MIPS M4K core delivers 1.56 DMIPS/MHz, giving roughly 125 DMIPS at the 80 MHz maximum operating frequency. Hardware multipliers, a prefetch cache, and a dedicated DMA controller support deterministic real-time response.
The architecture combines a Harvard-style bus with up to 32 KB of prefetch cache and tightly coupled SRAM, allowing zero-wait-state execution from Flash at full speed. The integrated USB OTG controller with on-chip transceiver eliminates the need for an external PHY for full-speed device or host applications. The on-chip voltage regulator generates the 1.8V core voltage from a single 2.3-3.6V supply, simplifying board design.
Typical applications include consumer USB peripherals, human-interface devices (HID) such as keyboards and game controllers, industrial HMI panels, low-cost motor control, and embedded Wi-Fi/Bluetooth co-processor hosts. The combination of 256 KB Flash and 64 KB RAM supports USB stacks, TCP/IP libraries, and graphical user interfaces built on the MPLAB Harmony framework.
When designing with this part, ensure that the USB pins are routed as a 90-ohm differential pair (D+/D-) and that the VDDCORE pin has a 1 uF low-ESR ceramic capacitor placed within 4 mm. Always use the latest MPLAB X IDE with the matching XC32 compiler to guarantee correct SFR definitions, and review the device errata published by Microchip before locking the BOM.
This page synthesizes distributor pricing, drop-in compatible same-package alternatives, USB-aware design notes, and parametric comparison data not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX450F256LT-I/TL — 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-I/TL (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256L-I/TL
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC32MX450F256L-120/TL
✅ Drop-In✓ In Stock
$5.48 / Unit
View Datasheet →PIC32MX450F256HT-I/TL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX470F256L-I/TL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX450F256HT-V/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.05 / Unit
View Datasheet →PIC32MX470F256HT-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX450F256LT-I/TL Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K |
| Core Architecture | 32-bit RISC |
| Operating Frequency | 80 MHz |
| DMIPS | 124 DMIPS (1.56 DMIPS/MHz) |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 64 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Core Voltage | 1.8 V (internal regulator) |
| Package | 124-pin VTLA (9x9 mm, dual row, exposed pad) |
| USB | USB 2.0 Full-Speed OTG with on-chip transceiver |
| SPI / I2S | 2 |
| I2C | 2 |
| UART / USART | 2 |
| Analog Comparators | 2 |
| ADC | 10-bit, up to 28 channels |
| Parallel Master Port (PMP) | Yes |
| DMA Channels | 8 (4 in some variants) |
| Timers | 5 16-bit timer/counter modules |
| Operating Temperature | -40C to +85C (Industrial, "-I") |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX450F256LT-I/TL 124-pin vtla (9x9 mm, dual row, exposed pad) Pin Configuration Guide
Pin configuration for PIC32MX450F256LT-I/TL (124-pin vtla (9x9 mm, dual row, exposed pad) 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-I/TL.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F256LT-I/TL is suitable for 6 applications: USB HID Peripherals, Industrial HMI Panels, Audio Streaming USB Devices, Connectivity Co-Processor Hosts, Motor Control and Brushless Drives, Consumer Embedded Products.
USB HID Peripherals
The PIC32MX450F256LT-I/TL is ideal for USB Human Interface Devices such as keyboards, mice, gamepads, and custom HID controllers. Its integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver eliminates the need for an external PHY, while the 80 MHz MIPS M4K core provides enough headroom for USB polling, HID report parsing, and LED matrix scanning concurrently. With 256 KB Flash and 64 KB SRAM, it can host Microchip's MPLAB Harmony USB stack plus a custom HID descriptor set. Power dissipation at 80 MHz remains under 100 mW with the 3.3V supply, simplifying bus-powered USB designs. The 124-pin VTLA package exposes all USB pins for direct D+/D- routing as a 90-ohm differential pair.
Recommended
Industrial HMI Panels
For industrial human-machine interface panels with USB-touchscreen integration, the PIC32MX450F256LT-I/TL delivers the right combination of memory, peripherals, and speed. Its Parallel Master Port (PMP) drives common TFT-LCDs directly without an external graphics controller, while the USB OTG controller supports USB touch controllers. The 124-pin VTLA package has sufficient I/O to drive a 16-bit parallel LCD bus plus capacitive-touch I2C. Running at 80 MHz, the MCU executes MPLAB Harmony graphics stacks with sub-frame latency. Industrial temperature rating (-40C to +85C) is verified for panel-meter, factory-automation, and building-automation products.
Recommended
Audio Streaming USB Devices
USB audio class devices such as USB microphones, USB DACs, and USB headsets benefit from the PIC32MX450F256LT-I/TL's on-chip USB OTG controller and dual I2S ports. The MIPS M4K core at 80 MHz can stream 24-bit / 96 kHz audio over USB isochronous endpoints while running a real-time DSP filter chain for echo cancellation or EQ. Two dedicated I2S peripherals allow simultaneous I2S input and output, while the DMA engine moves audio samples without CPU intervention. The 256 KB Flash accommodates ASRC and small mixing tables, and the 64 KB SRAM acts as a jitter buffer. The 124-pin VTLA package keeps the PCB compact while exposing every I/O needed for multi-channel audio.
Recommended
Connectivity Co-Processor Hosts
The PIC32MX450F256LT-I/TL is well-matched to embedded Wi-Fi or Bluetooth co-processor hosts, where it runs the host-side TCP/IP or BT HCI stack while a companion radio module handles the RF link. UART, SPI, and USB OTG ports provide multiple host interfaces to common radio modules such as ESP32 or BT modules, and the 256 KB Flash stores full Wi-Fi/BT firmware stacks. The MIPS M4K core's deterministic interrupt latency supports the timing-sensitive HCI transport. With 124-pin VTLA packaging, the design keeps PCB size small while routing both USB and high-speed serial interfaces to external radios.
Recommended
Motor Control and Brushless Drives
Low-voltage brushless DC motor controllers benefit from the PIC32MX450F256LT-I/TL's PWM timers, dual analog comparators, and ADC channels. The 80 MHz MIPS M4K core runs field-oriented control (FOC) at 20 kHz with sub-10 us loop time, while the 10-bit ADC samples phase currents at 1 Msps for high-bandwidth torque control. The 124-pin VTLA package routes PWM outputs to 3-phase gate drivers without multiplexing. Industrial temperature grade (-40C to +85C) supports appliance, e-bike, and small industrial motor designs where the USB port doubles as a programming/debug interface during manufacturing.
Recommended
Consumer Embedded Products
For consumer electronics such as wearables, smart-home hubs, and small appliances, the PIC32MX450F256LT-I/TL provides a balanced cost-to-performance ratio. Its 256 KB Flash runs IoT application logic plus USB firmware update stacks, while the 64 KB SRAM supports GUI buffers and communication queues. The USB OTG controller enables USB device charging and data exchange without an external PHY, and the 124-pin VTLA package keeps the BOM compact for miniaturized consumer products. Active power consumption at 3.3V / 80 MHz is well under 100 mW, supporting battery-friendly designs with USB charging.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256LT-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256L-I/TL | PIC32MX450F256L-120/TL | PIC32MX450F256HT-I/TL | PIC32MX470F256L-I/TL |
|---|---|---|---|---|---|
| Package | 124-pin VTLA (9x9 mm) | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same | 124-pin VTLA (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Frequency | 80 MHz | 50 MHz | 120 MHz | 80 MHz | 80 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG + HS |
| Automotive Grade | No | No | No | Yes (AEC-Q100) | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG with on-chip transceiver (vs PIC32MX250F256L-I/PF)
- 80 MHz MIPS M4K core with 124-pin VTLA package (vs PIC32MX450F256LT-I/PT)
- Industrial temperature grade and 256 KB Flash headroom (vs PIC32MX350F256L-V/PT)
Design Notes
Route the USB D+ and D- signals as a 90-ohm differential pair on the top layer with no splits or stubs, and keep the pair length-matched to within 150 mil. Place the VBUS-sense and pull-up resistor within 4 mm of the corresponding VTLA pins. The exposed thermal pad must be soldered to a continuous copper pour with at least 8 thermal vias to the inner plane for adequate heat spreading - skipping this step raises junction temperature by 8-10 C at 80 MHz full-load operation.
The PIC32MX450F256LT-I/TL integrates a 1.8V core regulator powered from VDD (2.3-3.6V). Place a 1 uF low-ESR ceramic capacitor (X7R, 0603 or 0805) within 4 mm of the VDDCORE pin. Estimated: at 80 MHz active mode, the core draws roughly 25 mA, so the internal regulator dissipates about (3.3V - 1.8V) * 25 mA = 37 mW from a 3.3V rail - well within thermal limits.
Common mistakes when migrating from PIC32MX330/350/370 to the PIC32MX450 family include ignoring the JTAG-enabled TRD0/TRCLK pins (left floating or as GPIO - consult the device errata for revisions affecting debug). Always use the latest PIC32MX3XX/4XX family errata document before locking the BOM, especially for silicon revision A1 vs A3 differences in the USB suspend behavior. ICSP programming pins must not be pulled to ground during normal operation, as this can lock the device in reset.
The 124-pin VTLA package has fine-pitch leads that require careful PCB layout - keep all signal traces at least 0.15 mm from adjacent VTLA pads to avoid solder bridging during reflow. Use a microstrip-with-ground reference geometry for high-speed signals such as the parallel master port data bus to control impedance. The analog AVSS pin must be tied to a clean ground island separate from noisy digital ground, joined at a single point near the MCU.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - select PIC32MX450F256HT-I/TL for automotive. Industrial temperature grade (-40C to +85C).
