PIC32MX450F256LT-V/TL - 80MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX450F256LT-V/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.87 | $6.87 |
| 10 | $6.18 | $61.80 |
| 100 | $5.49 | $549.00 |
| 500 | $4.94 | $2,470.00 |
| 1,000 | $4.39 | $4,390.00 |
PIC32MX450F256LT-V/TL Overview
A 32-bit microcontroller (MCU) is a programmable integrated circuit that combines a high-performance processor core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals in a single silicon die. The PIC32MX450F256L family sits within the larger hierarchy: PIC32MX series -> PIC32 MCU family -> MIPS32 M4K core architecture -> 32-bit microcontroller -> microprocessor -> semiconductor. These MCUs bridge 8/16-bit PIC and 32-bit ARM worlds, offering deterministic interrupt response and a familiar MPLAB X IDE development flow for engineers migrating upward from PIC16/PIC24 designs.
Key features include 256KB Flash (256K x 8), 64KB RAM, USB 2.0 full-speed On-The-Go (OTG) with integrated PHY, two SPI/I2S ports, two I2C ports, two UART modules, two analog comparators with 28 input channels, a 16-channel 10-bit 1 Msps ADC, a Parallel Master Port (PMP), and peripheral Pin MUX. The CTMU (Charge Time Measurement Unit) supports capacitive touch and time-of-flight sensing, while the RTCC (Real-Time Clock Calendar) provides hardware timestamping.
Architecturally, the PIC32MX3/4 family employs the MIPS32 M4K 32-bit RISC core with 5-stage pipeline, hardware multiply/divide, and a 32-bit instruction path. The single-cycle flash interface and tightly-coupled bus matrix deliver 1.62 DMIPS/MHz (approximately 130 DMIPS at 80MHz). The integrated USB 2.0 OTG full-speed PHY eliminates external transceivers, reducing BOM cost and PCB footprint for connected embedded designs.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control and human-machine interfaces (HMI), capacitive touch keypads, medical instrumentation, point-of-sale terminals, and graphics displays driven through PMP. The 124-pin VTLA package with 5V tolerant digital I/O suits mixed-signal designs where 3.3V logic meets 5V sensors or relays.
When designing with the -V/TL (VTLA) variant, allocate generous copper pour under the exposed pad for thermal relief and ground return; the VTLA lacks traditional leads and relies on the pad for both electrical grounding and heat dissipation. Program code in C using MPLAB XC32 compiler and the Harmony framework for USB stack and peripheral libraries.
Drop-in alternatives for PIC32MX450F256LT-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 PIC32MX450F256LT-V/TL (same form factor and footprint) — differing in ADC, Package, USB, Core Architecture, RTCC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256L-V/TL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX450F256LT-I/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.78 / Unit
View Datasheet →PIC32MX450F256L-120/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.48 / Unit
View Datasheet →PIC32MX450F256L-I/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.2 / Unit
View Datasheet →PIC32MX450F256LT-V/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.49 / Unit
View Datasheet →PIC32MX450F256LT-V/TL Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Max CPU Speed | 80 MHz |
| Flash Program Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| USB | USB 2.0 OTG Full-Speed with integrated PHY |
| SPI/I2S | 2 |
| I2C | 2 |
| UART | 2 |
| ADC | 10-bit, 1 Msps, 16 channels |
| Analog Comparators | 2 (28 input channels) |
| CTMU | Yes (Capacitive Touch, time-of-flight) |
| RTCC | Yes (Real-Time Clock Calendar) |
| PMP | Yes (Parallel Master Port) |
| DMA | Yes |
| Pin Count | 124 |
| Package | 124-VTLA (Very Thin Leadless Array) with exposed pad |
| Operating Temperature | -40C to +105C (V-temp) |
| Supply Voltage | 2.3V to 3.6V |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC32MX450F256LT-V/TL Pin Configuration
| Pin 1 | RA0 — General purpose I/O / analog input / CTMU |
| Pin 2 | RA1 — General purpose I/O / analog input / CTMU |
| Pin 3 | RA2 — General purpose I/O / analog input |
| Pin 4 | RA3 — General purpose I/O / analog input |
| Pin 5 | RA4 — General purpose I/O / analog input |
| Pin 6 | RA5 — General purpose I/O / analog input |
| Pin 7 | RA6 — General purpose I/O |
| Pin 8 | RA7 — General purpose I/O |
| Pin 9 | RB0 — General purpose I/O / programming |
| Pin 10 | RB1 — General purpose I/O |
| Pin 11 | RB2 — General purpose I/O |
| Pin 12 | RB3 — General purpose I/O |
| Pin 13 | RB4 — General purpose I/O |
| Pin 14 | RB5 — General purpose I/O |
| Pin 15 | RB6 — General purpose I/O |
| Pin 16 | RB7 — General purpose I/O |
| Pin 17 | RC1 — General purpose I/O |
| Pin 18 | RC2 — General purpose I/O |
| Pin 19 | RC3 — General purpose I/O |
| Pin 20 | RC4 — General purpose I/O |
| Pin 21 | VSS — Ground |
| Pin 22 | VDD — Power supply 2.3V-3.6V |
| Pin 23 | RD0 — General purpose I/O |
| Pin 24 | RD1 — General purpose I/O |
| Pin 25 | RD2 — General purpose I/O |
| Pin 26 | RD3 — General purpose I/O |
| Pin 27 | RD4 — General purpose I/O |
| Pin 28 | RD5 — General purpose I/O |
| Pin 29 | RD6 — General purpose I/O |
| Pin 30 | RD7 — General purpose I/O |
| Pin 31 | RE0 — General purpose I/O |
| Pin 32 | RE1 — General purpose I/O |
| Pin 33 | RE2 — General purpose I/O |
| Pin 34 | RE3 — General purpose I/O |
| Pin 35 | RE4 — General purpose I/O |
| Pin 36 | RE5 — General purpose I/O |
| Pin 37 | RE6 — General purpose I/O |
| Pin 38 | RE7 — General purpose I/O |
| Pin 39 | RF0 — General purpose I/O |
| Pin 40 | RF1 — General purpose I/O |
| Pin 41 | RF2 — General purpose I/O |
| Pin 42 | RF3 — General purpose I/O |
| Pin 43 | RF4 — General purpose I/O |
| Pin 44 | RF5 — General purpose I/O |
| Pin 45 | RF6 — General purpose I/O |
| Pin 46 | RF7 — General purpose I/O |
| Pin 47 | RG0 — General purpose I/O |
| Pin 48 | RG1 — General purpose I/O |
| Pin 49 | RG2 — General purpose I/O |
| Pin 50 | RG3 — General purpose I/O |
| Pin 51 | RG6 — General purpose I/O |
| Pin 52 | RG7 — General purpose I/O |
| Pin 53 | RG8 — General purpose I/O |
| Pin 54 | RG9 — General purpose I/O |
| Pin 55 | VSS — Ground |
| Pin 56 | VDD — Power supply 2.3V-3.6V |
| Pin 57 | RH0 — General purpose I/O |
| Pin 58 | RH1 — General purpose I/O |
| Pin 59 | RH2 — General purpose I/O |
| Pin 60 | RH3 — General purpose I/O |
| Pin 61 | RH4 — General purpose I/O |
| Pin 62 | RH5 — General purpose I/O |
| Pin 63 | RH6 — General purpose I/O |
| Pin 64 | RH7 — General purpose I/O |
| Pin 65 | RJ0 — General purpose I/O |
| Pin 66 | RJ1 — General purpose I/O |
| Pin 67 | RJ2 — General purpose I/O |
| Pin 68 | RJ3 — General purpose I/O |
| Pin 69 | RJ4 — General purpose I/O |
| Pin 70 | RJ5 — General purpose I/O |
| Pin 71 | RJ6 — General purpose I/O |
| Pin 72 | RJ7 — General purpose I/O |
| Pin 73 | VSS — Ground |
| Pin 74 | VDD — Power supply 2.3V-3.6V |
| Pin 75 | RK0 — General purpose I/O |
| Pin 76 | RK1 — General purpose I/O |
| Pin 77 | RK2 — General purpose I/O |
| Pin 78 | RK3 — General purpose I/O |
| Pin 79 | RK4 — General purpose I/O |
| Pin 80 | RK5 — General purpose I/O |
| Pin 81 | RK6 — General purpose I/O |
| Pin 82 | RK7 — General purpose I/O |
| Pin 83 | RL0 — General purpose I/O |
| Pin 84 | RL1 — General purpose I/O |
| Pin 85 | RL2 — General purpose I/O |
| Pin 86 | RL3 — General purpose I/O |
| Pin 87 | RL4 — General purpose I/O |
| Pin 88 | RL5 — General purpose I/O |
| Pin 89 | RL6 — General purpose I/O |
| Pin 90 | RL7 — General purpose I/O |
| Pin 91 | VSS — Ground |
| Pin 92 | VDD — Power supply 2.3V-3.6V |
| Pin 93 | OSC1 — Crystal oscillator input |
| Pin 94 | OSC2 — Crystal oscillator output |
| Pin 95 | SOSC1 — Secondary low-power oscillator input |
| Pin 96 | SOSC2 — Secondary low-power oscillator output |
| Pin 97 | VREF- — ADC voltage reference negative |
| Pin 98 | VREF+ — ADC voltage reference positive |
| Pin 99 | AVDD — Analog power supply |
| Pin 100 | AVSS — Analog ground |
| Pin 101 | D+ — USB data plus |
| Pin 102 | D- — USB data minus |
| Pin 103 | VBUS — USB VBUS detect |
| Pin 104 | MCLR — Master clear reset |
| Pin 105 | PGEC1 — ICSP programming clock |
| Pin 106 | PGED1 — ICSP programming data |
| Pin 107 | PGEC2 — Trace/ICSP clock |
| Pin 108 | PGED2 — Trace/ICSP data |
| Pin 109 | RTCC — Real-time clock calendar alarm |
| Pin 110 | SDA1 — I2C1 data |
| Pin 111 | SCL1 — I2C1 clock |
| Pin 112 | SDA2 — I2C2 data |
| Pin 113 | SCL2 — I2C2 clock |
| Pin 114 | SDO1 — SPI1 data out |
| Pin 115 | SDI1 — SPI1 data in |
| Pin 116 | SCK1 — SPI1 clock |
| Pin 117 | SS1 — SPI1 slave select |
| Pin 118 | SDO2 — SPI2 data out |
| Pin 119 | SDI2 — SPI2 data in |
| Pin 120 | SCK2 — SPI2 clock |
| Pin 121 | SS2 — SPI2 slave select |
| Pin 122 | U1TX — UART1 transmit |
| Pin 123 | U1RX — UART1 receive |
| Pin 124 | EP — Exposed thermal pad - connect to VSS |
Typical Applications
PIC32MX450F256LT-V/TL is suitable for 6 applications: USB Peripherals and HID Devices, Capacitive Touch Keypads and HMI, Industrial Control and PLC Modules, Medical Instrumentation and Patient Monitors, Point-of-Sale (POS) Terminals and Printers, Graphics Displays with PMP Interface.
USB Peripherals and HID Devices
The PIC32MX450F256LT-V/TL is ideal for USB peripherals thanks to its integrated USB 2.0 OTG full-speed PHY, eliminating external transceivers and BOM cost. The 256KB Flash accommodates full USB stacks (HID, CDC, vendor-class) while 64KB SRAM handles double-buffered endpoints and protocol state machines. Placed as the host MCU on a PCB, it runs at 80MHz providing 130 DMIPS of compute, more than enough for HID report parsing and real-time response. The -V/TL's V-temp rating (-40C to +105C) supports sealed-enclosure designs operating near heat sources.
Recommended
Capacitive Touch Keypads and HMI
The PIC32MX450F256LT-V/TL's integrated CTMU (Charge Time Measurement Unit) enables robust capacitive touch sensing without dedicated touch controllers. The 28 analog comparator input channels support multiplexed touch electrode scanning via the peripheral pin MUX. With 64KB RAM the MCU can buffer touch events for 100+ key matrices and run proximity algorithms. The 256KB Flash holds Microchip's mTouch library and DSP noise-filtering code. Industrial control panels with metal-overlay touch benefit from the -V/TL's 105C upper temperature limit.
Recommended
Industrial Control and PLC Modules
The PIC32MX450F256LT-V/TL suits industrial PLC and remote I/O modules because of its 5V-tolerant digital I/O, RTCC for scheduled control tasks, and 16-channel 10-bit ADC for sensor readout. Operating from a 3.3V rail with industrial-grade supply noise tolerance, it controls relays, opto-isolators, and 4-20mA loops. The 80MHz MIPS M4K core executes PID loops deterministically. Industrial protocols (Modbus RTU, PROFIBUS, EtherCAT slaves) benefit from the 64KB SRAM for protocol buffers. The -V/TL temperature grade supports factory-floor enclosures.
Recommended
Medical Instrumentation and Patient Monitors
The PIC32MX450F256LT-V/TL fits portable medical instrumentation such as pulse oximeters, blood pressure cuffs, and glucose meters. Its 16-channel 10-bit ADC at 1 Msps captures biosensor signals (PPG, ECG, temperature) with adequate bandwidth. The CTMU supports electrode impedance measurements. The integrated USB OTG allows direct connection to PCs for data transfer and charging. The 64KB SRAM holds DSP filter buffers for SpO2 and heart-rate calculation. The -V/TL V-temp grade covers typical medical operating environments.
Recommended
Point-of-Sale (POS) Terminals and Printers
POS terminals benefit from the PIC32MX450F256LT-V/TL's integrated USB OTG, dual SPI for thermal printer heads, dual I2C for secure PIN pads, and PMP for character LCD or graphic displays. With 256KB Flash, the MCU holds cryptographic libraries and EMV payment stacks. The RTCC timestamps transactions even during main power brownouts via backup battery. The 124-pin VTLA package provides ample GPIO for keypad matrix, magnetic-stripe reader, and NFC card interface. The 64KB RAM supports full EMV transaction buffers.
Recommended
Graphics Displays with PMP Interface
The PIC32MX450F256LT-V/TL drives small to mid-sized TFT LCD panels through its Parallel Master Port (PMP) at 80MHz, sufficient for QVGA (320x240) panels. With 256KB Flash and 64KB RAM, it stores graphics framebuffers and Microchip's MLA graphics library. The dual SPI/I2S ports support external flash for image storage. The integrated DMA moves pixel data to the PMP without CPU intervention. Industrial kiosks, equipment HMI, and instrumentation displays benefit from the V-temp grade for unattended installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256LT-V/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256L-V/TL | PIC32MX450F256LT-I/TL | PIC32MX450F256L-120/TL | PIC32MX450F256L-I/TL | PIC32MX450F256LT-V/PF |
|---|---|---|---|---|---|---|
| Package | 124-VTLA | 124-VTLA - same | 124-VTLA - same | 124-VTLA - same | 124-VTLA - same | 100-TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Max CPU Speed | 80 MHz | 80 MHz | 80 MHz | 120 MHz (+50%) | 80 MHz | 80 MHz |
| Temperature Grade | V-temp -40C to +105C | V-temp -40C to +105C | I-temp -40C to +85C | V-temp -40C to +105C | I-temp -40C to +85C | V-temp -40C to +105C |
| USB OTG | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) |
| 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, 16 ch, 1 Msps |
| Unit Price (qty 1000) | $4.39 | Similar (T&R variant) | Lower (I-temp grade) | Higher (120MHz speed grade) | Lower (I-temp grade) | Similar (tray variant) |
Key Differentiators
- Integrated USB OTG PHY eliminates external transceiver (vs PIC32MX340F128H-80V/MR)
- Higher clock headroom with -120 sibling variants (vs PIC32MX450F256L-120/TL)
- Industrial-grade V-temp vs I-temp for cost-sensitive designs (vs PIC32MX450F256LT-I/TL)
Design Notes
The 124-VTLA package has no traditional leads; the central exposed pad (EP) MUST be soldered to a PCB land pattern for both electrical ground (VSS) and thermal dissipation. Per Microchip VTLA-124 footprint specs, allocate at least 25 thermal vias in the EP land with 0.3mm drill, stitched to a continuous ground plane on inner layers. Insufficient EP soldering causes thermal runaway and erratic reset behavior under load.
Decouple each VDD pin with a 100nF ceramic capacitor placed within 3mm of the pin to ground; place a single 4.7uF bulk capacitor near the package. Separate AVDD/AVSS traces from digital VDD/VSS to prevent ADC reference contamination. The USB VBUS pin requires a 5V-tolerant voltage divider (typically 22k/4.7k) for proper session detection.
Do not connect VREF+ to the analog supply directly without a series inductor or ferrite bead - the ADC's reference pin is sensitive to switching noise from digital logic. Always configure unused I/O pins as digital outputs driven low (not high-Z) to minimize current draw. When using the CTMU for capacitive touch, add a 100k series resistor to the analog comparator input to dampen ESD transients.
Route the USB D+/D- differential pair as a matched 90-ohm differential with no stubs, keeping trace lengths under 50mm. Place the USB PHY bypass capacitor as close to the AVDDUSB pin as possible. Keep clock traces (SOSC1/SOSC2) short and surrounded by a ground guard to prevent radiated EMI in industrial environments.
Compliance Information
RoHS and REACH compliance per Microchip product page. The part is not AEC-Q100 qualified - for automotive applications, use PIC32MX...Q parts or higher-tier PIC32MK automotive family.
