PIC32MX450F128LT-I/TL - 32-bit MCU 128KB Flash 124-VTLA | Microchip
MPN: PIC32MX450F128LT-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.65 | $4.65 |
| 10 | $4.2 | $42.00 |
| 100 | $3.74 | $374.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $2.98 | $2,980.00 |
PIC32MX450F128LT-I/TL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and peripherals such as ADC, timers, and communication interfaces. The PIC32MX family specifically bridges 8-bit PIC legacy code to true 32-bit MIPS performance while retaining peripheral compatibility. Within the broader taxonomy, the PIC32MX450F128L belongs to MCU > 32-bit microcontroller > MIPS architecture > embedded controller > semiconductor IC.
Key differentiating features include two analog comparators, two I2C interfaces, two SPI/I2S channels, five 16-bit timers, a 28-channel 10-bit ADC, USB 2.0 full-speed device/host/OTG, and four dedicated DMA channels. The MIPS32 M4K core executes most instructions in a single cycle and includes a hardware multiply/divide unit, achieving up to 1.56 DMIPS/MHz.
The architecture combines Harvard bus organization with separate instruction and data paths, plus a prefetch cache to mitigate Flash wait states at full 80 MHz. Code protection, JTAG and two-wire programming/debug interfaces support field updates. The 124-pin VTLA EP package exposes ample I/O for parallel buses, multiple serial channels, and external memory interfaces.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control and HMI panels, audio processing with I2S codec interfaces, multi-channel sensor data acquisition, and consumer devices requiring USB connectivity. The integrated USB 2.0 FS OTG controller eliminates the need for an external PHY in low-cost designs.
A key design consideration is decoupling: place 0.1 uF and 10 uF capacitors close to each power pin pair, and reserve the VBUS pin for 5V-tolerant USB operation. For analog accuracy, route the AVDD/VSS pair with a ferrite bead and keep ADC traces away from switching nodes.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX450F128LT-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 PIC32MX450F128LT-I/TL (same form factor and footprint) — differing in Package, ADC, USB, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F128HT-I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F128HT-V/RG
✅ Drop-In✓ In Stock
$4.42 / Unit
View Datasheet →PIC32MX450F128HT-I/RG
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →PIC32MX450F128H-I/RG
✅ Drop-In✓ In Stock
$2.79 / Unit
View Datasheet →PIC32MX450F128H-I/MR
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX440F128LT-80V/PT
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC32MX440F128HT-80I/MR
✅ Drop-In✓ In Stock
$4.3 / Unit
View Datasheet →PIC32MX340F128HT-80I/MR
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →PIC32MX450F128LT-I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| CPU Bit Width | 32-bit |
| Maximum CPU Frequency | 80 MHz |
| Program Memory (Flash) | 128 KB |
| SRAM | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Typical Operating Voltage | 2.5 V / 3.3 V |
| ADC Channels | 28 channels |
| ADC Resolution | 10-bit |
| Analog Comparators | 2 |
| I2C Interfaces | 2 |
| SPI/I2S Interfaces | 2 |
| Timers (16-bit) | 5 |
| DMA Channels | 4 dedicated |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Pin Count | 124 |
| Package | VTLA EP 124-pin |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Packaging | Tape & Reel (T/L) |
PIC32MX450F128LT-I/TL vtla ep 124-pin Pin Configuration Guide
Pin configuration for PIC32MX450F128LT-I/TL (vtla ep 124-pin 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-I/TL.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX450F128LT-I/TL is suitable for 6 applications: USB Peripherals and HID Devices, Industrial Control and HMI Panels, Audio Processing with I2S Codecs, Multi-Channel Sensor Data Acquisition, Consumer Devices with USB Connectivity, IoT Edge Nodes and Smart Sensors.
USB Peripherals and HID Devices
The PIC32MX450F128LT-I/TL's integrated USB 2.0 Full-Speed OTG controller enables direct connection to a USB host without an external PHY, ideal for HID-class peripherals such as keyboards, mice, game controllers, and custom input devices. The 80 MHz MIPS32 M4K core provides sufficient headroom to run the USB stack plus application code simultaneously. With 128 KB Flash and 32 KB SRAM, the device accommodates USB middleware, class drivers, and HID report descriptors while leaving room for application firmware. The 28-channel ADC supports analog buttons or sensors, while two I2C and two SPI/I2S interfaces handle auxiliary peripherals such as RGB LED drivers and audio codecs. Designed for low-power USB suspend mode, the part suits bus-powered designs drawing under 100 mA from the VBUS rail.
Recommended
Industrial Control and HMI Panels
The PIC32MX450F128LT-I/TL serves industrial control and human-machine interface (HMI) applications where its 80 MHz performance and rich connectivity shine. The 28-channel 10-bit ADC is sufficient for multi-loop process monitoring of temperature, pressure, and flow sensors, while five 16-bit timers support PWM-driven motor control or LED dimming. Two I2C buses connect to GPIO expanders and EEPROM, and two SPI/I2S channels drive graphic LCDs or audio feedback. The 124-pin package exposes ample I/O for keypad scanning and parallel PMP bus interfacing TFT displays. Industrial temperature grade -40C to +85C ensures operation in factory environments. Microchip's Harmony framework and free TCP/IP stack simplify development of networked industrial controllers with Modbus or Ethernet connectivity via external PHYs.
Recommended
Audio Processing with I2S Codecs
The PIC32MX450F128LT-I/TL's dual SPI/I2S interfaces enable direct connection to external audio DACs and ADCs, supporting stereo audio playback and capture at sample rates up to 48 kHz. The MIPS32 M4K core at 80 MHz runs audio processing algorithms such as equalization, dynamics control, or basic effects while feeding the I2S codec in real time. With 32 KB of SRAM, the device buffers audio frames without compromising responsiveness. DMA channels offload I2S transfers, freeing CPU cycles for DSP. The 128 KB Flash holds audio decoders such as ADPCM or simple MP3 variants, while the USB OTG controller supports audio streaming from a host. This combination is well-suited for USB speakers, headphone amplifiers, and digital audio mixers under $20 BOM cost.
Recommended
Multi-Channel Sensor Data Acquisition
The PIC32MX450F128LT-I/TL excels in multi-channel data acquisition systems thanks to its 28-channel 10-bit ADC, four DMA channels, and dual I2C/SPI interfaces. Engineers can sample up to 28 analog sensors at rates up to 1 Msps aggregate while DMA offloads the conversion results into SRAM buffers. The MIPS32 M4K core runs calibration, linearization, and digital filtering in real time. Two I2C buses address digital sensors like accelerometers, gyroscopes, and environmental sensors simultaneously. With 128 KB Flash, the firmware stores lookup tables for sensor compensation and configuration profiles. Industrial -40C to +85C temperature grade supports outdoor and factory deployments, while USB OTG enables tethered configuration and data upload to a host PC.
Recommended
Consumer Devices with USB Connectivity
Consumer products that connect to PCs or chargers via USB leverage the PIC32MX450F128LT-I/TL's integrated USB 2.0 Full-Speed OTG controller, eliminating external PHY cost and board area. Application examples include USB mass storage devices, CDC virtual COM ports, and game controllers. The MIPS32 M4K core at 80 MHz executes USB class drivers plus application logic, while 32 KB SRAM buffers USB packets and descriptors. The device's low-cost tape-and-reel packaging supports high-volume assembly, and 124-pin VTLA EP footprint suits compact consumer enclosures. Two I2C buses connect user-interface peripherals such as touch controllers or LED drivers, while SPI interfaces handle small displays. Microchip's free USB stack and Harmony code configurator accelerate time-to-market.
Recommended
IoT Edge Nodes and Smart Sensors
IoT edge nodes built on the PIC32MX450F128LT-I/TL benefit from its combination of USB connectivity for tethered provisioning, two I2C/SPI interfaces for sensor aggregation, and 80 MHz performance for on-device analytics. The 128 KB Flash hosts TLS libraries and JSON parsers for local data processing before cloud upload. With 32 KB of RAM, the device buffers time-series sensor data during network outages. The 28 ADC channels support analog sensors such as thermistors, photocells, and gas sensors commonly used in smart-home and environmental monitoring. USB OTG enables direct attachment to a smartphone for configuration via host-port detection. The industrial temperature grade supports outdoor IoT deployments in harsh climates.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F128LT-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F128HT-I/TL | PIC32MX450F128HT-V/RG | PIC32MX450F128HT-I/RG | PIC32MX450F128H-I/RG | PIC32MX440F128LT-80V/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VTLA-124 | VTLA-124 | VTLA-124 | VTLA-124 | VTLA-124 | VTLA-124 |
| Core Architecture | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | |
| USB OTG | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | No | No | |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +105 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG hardware without external PHY (vs PIC32MX440F128LT-80V/PT)
- Extended temperature option in same VTLA-124 footprint (vs PIC32MX450F128HT-V/RG)
- Same-family drop-in compatibility with PIC32MX340F128L sub-family (vs PIC32MX340F128HT-80I/MR)
Design Notes
Decouple each VDD/VSS pair with a 0.1 uF ceramic capacitor placed within 2 mm of the pin, plus a bulk 10 uF tantalum or ceramic near the package. The PIC32MX450F128LT-I/TL draws up to 75 mA active at 80 MHz with USB enabled, so budget the regulator headroom accordingly. The VBUS pin must see 5 V from the USB host; do not tie it directly to 3.3 V or the USB transceiver will mis-detect. Use a ferrite bead between digital 3.3 V and AVDD to reduce ADC reference noise. Estimated: with VIN 5 V from USB, MCU core 3.3 V at 75 mA, a low-dropout regulator dissipates approximately 0.13 mW - negligible, but at higher current peripheral loads the LDO thermal budget must be checked.
Route the 124-pin VTLA EP package with 4-layer PCB stack-up; the exposed thermal pad must be soldered to an unbroken ground plane with multiple thermal vias for heat dissipation. Place decoupling capacitors on the opposite side of the board directly under each power pin pair to minimize loop area. Keep the 28 ADC traces away from switching nodes such as PWM outputs and clock traces; use a ground guard ring around sensitive analog traces. The USB DP/DM traces require 90-ohm differential impedance and must be length-matched within 150 mil for USB Full-Speed compliance. Estimated: a 4-layer board with 0.2 mm via-in-pad thermal array can dissipate 1.5 W with 25 C junction rise.
Do not skip the configuration bits when programming; the PIC32MX450F128L requires explicit JTAG and oscillator configuration settings, and missing settings cause silent boot failures or debugger non-recognition. The USB D+ pull-up must be software-controlled through the OTG module rather than hard-wired, otherwise the host enumerates incorrectly. Avoid routing the I2S MCLK signal near the analog ADC inputs - the MCLK edge rates inject switching noise that couples into ADC readings. Always read the device ID register before enabling the USB peripheral to confirm the silicon revision matches the datasheet's errata list. Estimated: configuration bit errors account for approximately 30 percent of first-time board bring-up failures on PIC32 designs.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; choose automotive-grade PIC32MX variants if needed. Halogen-free and lead-free per Microchip packaging specifications.
