PIC32MX450F256LT-120/PT - 120MHz 32-bit MCU 256KB Flash USB | Microchip
MPN: PIC32MX450F256LT-120/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.49 | $64.90 |
| 100 | $5.78 | $578.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.65 | $4,650.00 |
PIC32MX450F256LT-120/PT Overview
A 32-bit microcontroller (MCU) is a programmable processor built on a 32-bit data/address architecture, sitting hierarchically between 8/16-bit MCUs and full microprocessors. The PIC32MX family uses the MIPS M4K core with 5-stage pipeline and hardware multiply/divide, occupying the mid-performance tier of embedded controllers. The "MX450" device class specifically targets USB-enabled connected applications with 256 KB of Flash, the largest code memory density in the PIC32MX3/4 family.
Key features include 120 MHz / 150 DMIPS core performance, 256 KB Flash, 64 KB SRAM, USB 2.0 full-speed with OTG, two comparators with 4-input mux, 16-channel 10-bit 1 Msps ADC, up to 81 general-purpose I/O, and 5-bit parallel master port. The integrated CTMU enables capacitive-touch sensing for HMI applications, and the RTCC keeps accurate time with calendar functions. The 100-pin TQFP package provides 81 I/O lines, making it suitable for high-pin-count designs.
Architecturally, the PIC32MX450F256L uses a Harvard memory layout with separate 32 KB instruction cache and 32 KB data cache backed by a prefetch module, allowing zero-wait-state Flash execution at full 120 MHz. Peripheral DMA and dedicated bus matrix minimize CPU intervention for USB, ADC, and SPI transactions. The 3.0–3.6 V core supply is paired with 5 V-tolerant I/O for mixed-voltage systems.
Typical applications include USB peripherals and human-interface devices (HID), embedded audio with I2S, industrial control panels with capacitive touch, motor-control front-ends, and connected sensors bridging to host PCs. The combination of large Flash, USB, and rich analog peripherals makes this device ideal for IoT gateways, point-of-sale terminals, and medical instrumentation.
When designing with this device, allocate proper decoupling (0.1 µF + bulk) near each VDD/VSS pair, follow USB differential-pair routing (90-ohm D+/D− impedance), and configure the JTAG/Trace pins appropriately for debug. The "T" suffix in the part number indicates tape-and-reel packaging; the "L" denotes low-power variant within the family.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not consolidated on the manufacturer datasheet.
Drop-in alternatives for PIC32MX450F256LT-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 PIC32MX450F256LT-120/PT (same form factor and footprint) — differing in Package, ADC, DMA Channels, Core Architecture, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256L-120/PT
✅ Drop-In✓ In Stock
$5.78 / Unit
View Datasheet →PIC32MX450F256LT-120/PF
✅ Drop-In✓ In Stock
$6.12 / Unit
View Datasheet →PIC32MX450F256HT-V/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256H-120/MR
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX450F256HT-120/MR
✅ Drop-In✓ In Stock
$3.27 / Unit
View Datasheet →PIC32MX450F128LT-I/TL
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →PIC32MX450F256LT-120/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Family | PIC32MX3/4 |
| Maximum CPU Speed | 120 MHz |
| DMIPS | 150 |
| Flash Program Memory | 256 KB |
| SRAM | 64 KB |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| UART | 6 |
| SPI / I2S | 2 (with I2S mode) |
| I2C | 2 |
| ADC | 10-bit, 16-channel, 1 Msps |
| Comparators | 2 |
| RTCC | Yes (Real-Time Clock + Calendar) |
| CTMU | Yes (Capacitive Touch) |
| General-Purpose I/O | 81 |
| Parallel Master Port | 8-bit (PMP) |
| Operating Temperature Range | 0C to +70C (commercial) |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Package | TQFP-100 (PT) 12x12 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC32MX450F256LT-120/PT tqfp-100 (pt) 12x12 mm Pin Configuration Guide
Pin configuration for PIC32MX450F256LT-120/PT (tqfp-100 (pt) 12x12 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 PIC32MX450F256LT-120/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F256LT-120/PT is suitable for 6 applications: USB Human Interface Device (HID), Capacitive Touch Control Panel, Embedded Audio Streaming Device, Industrial Control PLC Module, Point-of-Sale Terminal, Medical Sensor Data Logger.
USB Human Interface Device (HID)
The PIC32MX450F256LT-120/PT is ideal for USB HID-class peripherals such as keyboards, mice, game controllers, and custom input devices. Its integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver eliminates the need for external PHY components, reducing BOM cost and PCB footprint. The 120 MHz/150 DMIPS core handles HID report parsing, debounce logic, and macro translation in real time. The 256 KB Flash accommodates multi-profile USB stacks (HID, CDC, vendor-class) plus bootloaders for field updates. Compared to USB-incapable PIC32MX variants, this part delivers ready-to-use USB certification and Microchip's free MLA USB stack, accelerating development by 2-3 months versus external PHY solutions.
Recommended
Capacitive Touch Control Panel
The PIC32MX450F256LT-120/PT's integrated CTMU (Charge Time Measurement Unit) makes it well suited for capacitive-touch control panels and industrial HMIs. The CTMU hardware provides current sources with 100 nA-class resolution and timing measurement accurate to nanoseconds, supporting sliders, wheels, and matrix touch sensors up to 100 buttons. The 16-channel 10-bit ADC and 81 GPIO enable simultaneous touch-key scanning plus analog sensor readback. The 120 MHz MIPS32 M4K core can refresh up to 32 touch buttons at 100 Hz while maintaining USB HID report generation for host communication. Compared to standalone touch controllers, this part integrates touch plus USB plus general-purpose MCU in a single chip.
Recommended
Embedded Audio Streaming Device
The PIC32MX450F256LT-120/PT is a strong fit for embedded audio streaming applications including USB speakers, headphone amplifiers, and I2S-to-USB bridges. Its two I2S-capable SPI ports support 16/24/32-bit audio sample rates up to 192 kHz with DMA-driven transfers that offload the CPU. The 64 KB SRAM is sufficient for buffering 4 ms of stereo audio at 48 kHz/16-bit, enough for jitter-tolerant USB isochronous playback. Compared to PIC32MX370 parts with the same I2S hardware but only 80 MHz CPU, the 120 MHz core delivers 50% more processing headroom for DSP effects, equalizers, and software codecs. The USB isochronous mode guarantees glitch-free audio under host-side scheduling.
Recommended
Industrial Control PLC Module
The PIC32MX450F256LT-120/PT serves as a competent main controller for industrial control PLC modules and machine-control front-ends. Its 6 UARTs enable multi-protocol industrial buses (RS-232, RS-485, Modbus RTU), 2 I2C for sensor and EEPROM networks, and 16-channel ADC for analog signal acquisition from 4-20 mA loops or thermocouples. The 120 MHz MIPS32 core executes PLC scan cycles under 1 ms for typical 256-point I/O systems. The 5V-tolerant I/O allows direct interfacing with legacy 5V industrial sensors without level shifters, simplifying factory-automation designs. The RTCC with calendar enables timestamping of process events and alarms with battery backup.
Recommended
Point-of-Sale Terminal
The PIC32MX450F256LT-120/PT supports compact point-of-sale (POS) terminal designs including card readers, receipt printers, and barcode scanner interfaces. USB Full-Speed OTG enables direct connection to Android host tablets (USB HID/Slave) or peripherals (USB Host), eliminating the need for multiple chips. The 256 KB Flash stores the encrypted payment firmware stack, and the 64 KB SRAM handles transaction buffering plus secure-display rendering. The two comparators handle analog signals from card-reader front-ends and battery monitoring. Compared to PIC24/dsPIC alternatives, this part delivers 32-bit performance at similar cost and provides USB certification - critical for payment-terminal approvals.
Recommended
Medical Sensor Data Logger
The PIC32MX450F256LT-120/PT functions as a compact medical sensor data logger for portable diagnostic and monitoring equipment. The 16-channel 10-bit ADC at 1 Msps captures multiple physiological signals (ECG, SpO2, temperature) with adequate temporal resolution for 500 Hz ECG sampling. The 256 KB Flash stores 24+ hours of compressed patient data, while 64 KB SRAM handles real-time DSP preprocessing for heart-rate variability analysis. The RTCC timestamps each sample with sub-second accuracy for clinical correlation, and the USB OTG interface exports recorded sessions to clinical software. Compared to MSP430 ultra-low-power parts, this PIC32 variant trades longer battery life for higher processing headroom needed for biosignal DSP.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256LT-120/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256L-120/PT | PIC32MX450F256LT-120/PF | PIC32MX450F256HT-V/PT | PIC32MX450F128LT-I/TL | PIC32MX450F256H-120/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-100 (PT) 12x12 mm | TQFP-100 (PT) 12x12 mm - same | TQFP-100 (PF) 14x14 mm - same family | TQFP-100 (PT) 12x12 mm - same | TQFP-100 (TL) - same family | TQFP-64 (MR) - downgraded pin count |
| Maximum CPU Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | -40C to +105C (extended) | -40C to +85C (industrial) | 0C to +70C |
| General-Purpose I/O | 81 | 81 | 81 | 81 | 81 | 51 (TQFP-64) |
| ADC | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 12-ch, 1 Msps |
Key Differentiators
- Largest Flash density in PIC32MX3/4 family (vs PIC32MX450F128LT-I/TL)
- USB 2.0 Full-Speed OTG with on-chip transceiver (vs PIC32MX360F512L-80V/PT)
- Higher CPU speed for DSP/audio workloads (vs PIC32MX370F512LT-I/PT)
- Industrial temperature variant option (vs PIC32MX450F256HT-V/PT)
Design Notes
Estimated: At maximum CPU activity of 120 MHz with all peripherals active, the PIC32MX450F256LT-120/PT core current consumption is approximately 60-80 mA, with I/O pin leakage adding 5-10 mA. Decoupling must include one 0.1 µF X7R ceramic per VDD/VSS pin pair, plus one 10 µF bulk tantalum or ceramic capacitor near the device. VDDPLL (pin for the PLL analog supply) requires an additional dedicated RC filter (10 Ω + 0.1 µF) to suppress switching noise that would otherwise couple into the PLL and degrade frequency stability. A power-on reset supervisor is recommended for applications with slow-rising supplies above 3.6 V.
When routing USB 2.0 Full-Speed signals, the D+ and D- traces must form a 90-ohm differential pair with continuous reference plane on the layer below, no splits allowed, and matched lengths within 150 mil. Place the 15 kΩ pull-down resistor on D- and the 1.5 kΩ pull-up on D+ (D+ pull-up enables full-speed signaling) as close to the MCU pins as possible. Series ferrite beads on VBUS improve ESD robustness and EMI compliance. For TQFP-100 (PT) 12x12 mm packages, use 0.5 mm pitch fanout with micro-via-in-pad for clean ground-signal-thermal breakouts.
Common pitfalls when designing with the PIC32MX450F256LT-120/PT include: (1) Confusing suffix -120 (speed grade) with -120I/PT (industrial temperature) - the latter runs at the same 120 MHz but is qualified -40C to +85C. (2) Forgetting that JTAG pins are shared with GPIO and must be configured for boundary-scan or JTAG-disabled mode to avoid floating inputs at reset. (3) Underestimating ADC input impedance at high sample rates - the 10-bit ADC requires source impedance below 2.5 kΩ for full 1 Msps throughput. (4) Treating the L and LT suffix as different parts - the only difference is packaging format (tray vs tape-and-reel). (5) Configuring the CTMU current source too high for low-capacitance touch sensors, causing saturation. Start with the recommended 0.55 µA reference current setting per Microchip TB3065.
Compliance Information
RoHS and REACH compliant per Microchip product environmental compliance disclosures. AEC-Q100 not applicable for commercial-temp part; choose PIC32MX450F256HT-V/PT or -V/PT variants for automotive-grade qualifications.