PIC32MX450F128LT-V/TL - 80MHz 32-bit MCU 128KB Flash USB OTG | Microchip
MPN: PIC32MX450F128LT-V/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.6677 | $5.67 |
| 10 | $5.2 | $52.00 |
| 100 | $4.65 | $465.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.55 | $3,550.00 |
| 3,000 | $3.2 | $9,600.00 |
PIC32MX450F128LT-V/TL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals on one die. Within the broader taxonomy, the PIC32MX450F128L belongs to the class of 32-bit microcontrollers -> RISC microcontrollers -> MIPS-based MCUs -> embedded microcontrollers -> semiconductors. This positioning gives engineers 32-bit performance at near-8-bit pricing, and the integrated USB OTG peripheral removes the need for an external USB transceiver in many designs.
Key features include two I2S/SPI modules for codec and serial communication, Peripheral Pin Select (PPS) for flexible signal routing, a Parallel Master Port (PMP) for graphics or external memory interfaces, a Charge Time Measurement Unit (CTMU) for capacitive touch and accurate time-of-flight measurements, two analog comparators, a 10-bit 1 MSPS ADC, and connectivity peripherals covering I2C, IrDA, LIN bus, SPI, UART/USART, and USB OTG. The 80 MHz core delivers up to 105 DMIPS, providing headroom for protocol stacks such as USB, TCP/IP via software, or audio processing.
Architecturally, the device uses a Harvard-style 5-stage pipeline with a hardware multiply/divide unit, separate instruction and data buses, and a Prefetch Cache Module (PCM) that hides Flash latency. The 128KB Flash is single-cycle accessible when running from cache, and 32KB SRAM is large enough for full TCP/IP stacks or graphics framebuffers when paired with PMP-driven displays.
Typical applications include USB peripherals such as HID, CDC, MSD, and audio class devices, embedded audio with I2S codec interfacing, capacitive touch HMIs using CTMU, low-cost graphics displays driven via PMP, and industrial connectivity bridges (LIN, IrDA, RS-485). The integrated USB OTG and rich peripherals make it well-suited for sensor hubs and protocol-converter designs.
When designing, pay attention to the VTLA 9x9 mm package - it requires careful PCB thermal and routing planning due to 0.5 mm pitch and a center thermal pad. PPS must be configured in code before using remapped peripherals, and the USB bus needs a 48 MHz clock from the on-chip PLL.
This page combines verified distributor pricing, drop-in alternatives, and engineering design notes that go beyond the manufacturer datasheet to accelerate your PIC32MX450F128LT-V/TL selection and integration.
Drop-in alternatives for PIC32MX450F128LT-V/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 PIC32MX450F128LT-V/TL (same form factor and footprint) — differing in Package, ADC, USB, SRAM, DMIPS.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F128LT-I/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.98 / Unit
View Datasheet →PIC32MX450F128L-V/PF
✅ Drop-In✓ In Stock
$5.31 / Unit
View Datasheet →PIC32MX460F256LT-V/PF
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F128LT-V/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Width | 32-bit |
| Maximum CPU Speed | 80 MHz |
| DMIPS | 105 (up to) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature | -40 C to +105 C |
| Package | 124-pin VTLA (9x9 mm) |
| Mounting Type | Surface Mount |
| USB | USB 2.0 Full-Speed OTG |
| SPI / I2S Modules | 2 |
| I2C | 2 |
| UART/USART | Yes |
| ADC | 10-bit, up to 1 MSPS |
| Analog Comparators | 2 |
| CTMU | Yes (Charge Time Measurement Unit) |
| PMP (Parallel Master Port) | Yes |
| PPS (Peripheral Pin Select) | Yes |
| RoHS | Compliant |
PIC32MX450F128LT-V/TL 124-pin vtla (9x9 mm) Pin Configuration Guide
Pin configuration for PIC32MX450F128LT-V/TL (124-pin vtla (9x9 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 PIC32MX450F128LT-V/TL.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F128LT-V/TL is suitable for 6 applications: USB HID / CDC / MSD Peripherals, Embedded Audio with I2S Codec Interface, Capacitive Touch HMI with CTMU, Low-Cost Graphics Display via PMP, Industrial Connectivity Bridge (LIN / IrDA / RS-485), USB Sensor Hub / Data Logger.
USB HID / CDC / MSD Peripherals
The PIC32MX450F128LT-V/TL is purpose-built for USB peripherals thanks to its integrated USB 2.0 Full-Speed OTG controller that eliminates the need for an external transceiver. With 80 MHz of MIPS32 M4K performance (up to 105 DMIPS) and 32 KB of SRAM, the MCU can comfortably host USB HID, CDC virtual COM, and MSD mass-storage stacks simultaneously. Typical use: a 3.3 V board uses D+/D- directly to a USB-C or micro-B connector with ESD protection, runs the Microchip MLA USB stack, and exposes a HID + composite MSD interface from a single chip. The 128 KB Flash holds the USB stack plus application code, while the VTLA-124 package keeps the BOM compact for cable-dongle form factors.
Recommended
Embedded Audio with I2S Codec Interface
The two on-chip I2S/SPI modules make the PIC32MX450F128LT-V/TL a strong fit for USB audio class designs and standalone audio processors. The 80 MHz core sustains 48 kHz / 44.1 kHz stereo I2S streams at 24-bit resolution with headroom for DSP effects. The 32 KB SRAM is sufficient for double-buffered audio frames and USB isochronous endpoint buffers. A typical circuit pairs the MCU with a low-cost audio codec such as the PIC32 audio DAC line, using I2S for data and I2C for codec control. Designers can run USB Audio Class 1.0 firmware from Microchip's MLA library, enabling a $5 BOM USB-to-I2S bridge.
Recommended
Capacitive Touch HMI with CTMU
The on-chip Charge Time Measurement Unit (CTMU) provides a high-resolution time-measurement peripheral for capacitive touch sensing without an external touch controller IC. Combined with the 10-bit 1 MSPS ADC and 2 analog comparators, the PIC32MX450F128LT-V/TL can directly scan 30+ touch electrodes via PPS-routed I/O. The 80 MHz core executes the touch-scanning algorithm and debounce filtering in real time. Typical use: an industrial control panel with 12-16 capacitive buttons plus a small TFT display driven via PMP. Compared to designs using an external FDC1004 or AT42QT, the integrated CTMU saves $1-2 BOM and reduces PCB area.
Recommended
Low-Cost Graphics Display via PMP
The Parallel Master Port (PMP) on the PIC32MX450F128LT-V/TL can drive 8-bit or 16-bit parallel TFT displays directly at up to 25 MHz, enabling cost-effective graphical HMIs without an external graphics controller. The 32 KB SRAM holds a small framebuffer or a tile/character map for monochrome STN displays. Combined with the 80 MHz core, the device can refresh QVGA (320x240) panels with adequate frame rate for menu UIs. The integrated USB OTG peripheral allows the display to also function as a USB configuration tool, simplifying factory programming and field upgrades.
Recommended
Industrial Connectivity Bridge (LIN / IrDA / RS-485)
The PIC32MX450F128LT-V/TL combines I2C, SPI, two UART/USART blocks, and LIN bus support, making it a flexible protocol-conversion gateway between industrial field buses and a USB host. The 80 MHz core runs LIN master stacks, Modbus RTU, or IrDA protocols with deterministic latency. The 128 KB Flash holds multiple protocol stacks simultaneously, and the 2.3-3.6 V supply rails interface directly to 3.3 V transceivers such as the MCP2551 (CAN) or MAX3485 (RS-485). The /V temperature grade supports factory-floor -40C to +105C ambient operation.
Recommended
USB Sensor Hub / Data Logger
The PIC32MX450F128LT-V/TL is well-suited for USB-attached sensor hubs that aggregate I2C sensors, SPI ADCs, or analog signals and stream them to a host. With two I2C, two SPI/I2S, two UART, and a 10-bit ADC, the device can read 8-12 sensors concurrently while presenting as a USB CDC or HID device to the host. The 128 KB Flash stores configuration profiles and calibration tables, while the 32 KB SRAM buffers sensor data between USB transfers. The integrated USB OTG controller with the MLA stack supports both bus-powered and self-powered operation.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F128LT-V/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F128LT-I/TL | PIC32MX450F128L-V/PF | PIC32MX460F256LT-V/PF |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 124-pin VTLA (9x9 mm) | 124-pin VTLA (9x9 mm) - same | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) |
| Core | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit |
| Max CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 256 KB (+100%) |
| SRAM | 32 KB | 32 KB | 32 KB | 32 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 |
| Operating Temperature | -40 C to +105 C (V grade) | -40 C to +85 C (I grade) | -40 C to +105 C (V grade) | -40 C to +105 C (V grade) |
| Supply Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG without external transceiver (vs PIC32MX370F512L-V/TL)
- Wide operating temperature range to +105 C (vs PIC32MX450F128LT-I/TL)
- Compact 124-pin VTLA leadless package (vs PIC32MX450F128L-V/PT (TQFP-100))
Design Notes
The 124-pin VTLA (9x9 mm) package relies on the center exposed thermal pad for heat dissipation. For designs running the core near 80 MHz at +105 C ambient, solder the center pad to a copper pour of at least 1 square inch connected through thermal vias (0.3 mm drill, 0.5 mm pitch, 4-6 vias minimum). Estimated: at 80 MHz with full peripheral activity, core current draw is approximately 30-40 mA at 3.3 V (~0.1-0.13 W), which is well within the VTLA package's 30 C/W theta_JA capability with adequate copper.
The VTLA 9x9 mm package has a 0.5 mm pin pitch, requiring NSMD pads with 0.25 mm drill and 0.20-0.25 mm annular ring per IPC-7351. Use microvia-in-pad or staggered via fan-out to break out all 124 signals. Place 0.1 uF + 10 uF ceramic decoupling caps within 2 mm of every VDD/VDDCORE pin group. The USB D+/D- traces must be 90 ohm differential, length-matched within 150 mil, and routed over a continuous ground plane per USB 2.0 Full-Speed signal-integrity guidelines.
PPS (Peripheral Pin Select) is NOT configured at reset - digital peripherals default to specific fixed pins and require code-side remapping before they appear on alternative pins. Likewise, the analog peripherals (ADC, comparators) are NOT on PPS - they map to fixed pins. The CTMU peripheral requires calibration using the internal bandgap reference; without calibration, touch readings drift by 5-10%. The USB peripheral requires a stable 48 MHz clock from the on-chip PLL; do not attempt USB operation from the FRC oscillator directly.
Keep the 48 MHz USB clock traces short and shielded. Separate the analog AVdd rail (filtered with ferrite bead + 10 uF + 0.1 uF) from the digital Vdd rail to prevent ADC noise coupling. The external 8 MHz primary oscillator should use a fundamental-mode crystal with load capacitors sized to the crystal's CL specification; do not use an external clock driver without verifying the PIC32MX oscillator drive strength setting in the DEVCFG1 fuse.
Compliance Information
RoHS and REACH compliance per Microchip product declaration. The /V temperature grade extends to +105C but is NOT AEC-Q100 qualified - choose an AEC-Q100 qualified PIC32 family member for automotive applications.