PIC32MX450F128HT-I/RG - 80MHz 32-bit MCU 128KB Flash | Microchip
MPN: PIC32MX450F128HT-I/RG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.21 | $62.10 |
| 100 | $5.42 | $542.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.15 | $4,150.00 |
PIC32MX450F128HT-I/RG Overview
A 32-bit microcontroller (MCU) is a programmable computing device that executes instructions from a 32-bit-wide data path, enabling higher code density, faster arithmetic, and richer peripheral integration than 8-bit or 16-bit MCUs. The PIC32MX series is part of the broader MCU taxonomy: 32-bit MCU -> microcontroller -> programmable logic device -> semiconductor. It uses the MIPS32 M4K core, a Harvard-architecture RISC processor widely adopted in networking, industrial, and consumer applications.
Key features include 80 MHz operation, 128 KB Flash program memory, 32 KB SRAM, two SPI/I2S modules, two I2C modules, two UART modules, 28 ADC channels with 10-bit resolution, five 16-bit timers/counters, and a parallel master port. Operating voltage is 2.3V to 3.6V with industrial temperature range of -40C to +85C. The exposed thermal pad on the 64-QFN package enhances thermal dissipation.
The PIC32MX450F128H architecture uses a 5-stage pipeline M4K core capable of 1.53 DMIPS/MHz, with single-cycle multiplication, hardware multiply-accumulate, and zero-overhead loop control. Peripheral integration includes USB 2.0 Full-Speed On-The-Go, CAN 2.0B, and up to 53 general-purpose I/O pins, supporting versatile mixed-signal embedded designs.
Typical applications include industrial control, USB peripherals, automotive body electronics, home appliances, consumer electronics, and IoT edge devices. The combination of USB, CAN, ADC, and rich communication interfaces suits sensor hubs and HMI touch controllers.
When designing with this device, ensure proper decoupling with 100 nF capacitors placed close to each VDD pin and a bulk capacitor on the VBAT rail. The exposed thermal pad must be soldered to a copper pour to meet thermal specifications and provide a low-impedance ground return.
Drop-in alternatives for PIC32MX450F128HT-I/RG — 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 PIC32MX450F128HT-I/RG (same form factor and footprint) — differing in Package, USB, Core Architecture, ADC, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F128H-I/RG
✅ Drop-In✓ In Stock
$2.79 / Unit
View Datasheet →PIC32MX450F128HT-I/MR
✅ Drop-In✓ In Stock
$2.81 / Unit
View Datasheet →PIC32MX450F128H-I/MR
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC32MX450F128HT-I/RG Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Type | 32-bit RISC |
| Maximum CPU Speed | 80 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| ADC Channels | 28 |
| ADC Resolution | 10-bit |
| I2C Modules | 2 |
| SPI/I2S Modules | 2 |
| UART Modules | 2 |
| Timers | 5 x 16-bit |
| Package | 64-QFN (RG) 9x9 mm with Exposed Pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
PIC32MX450F128HT-I/RG Pin Configuration
| Pin 1 | RF0 — GPIO / U1RX |
| Pin 2 | RF1 — GPIO / U1TX |
| Pin 3 | SDA1 — I2C1 Data |
| Pin 4 | SCL1 — I2C1 Clock |
| Pin 5 | VDD — Power Supply |
| Pin 6 | VSS — Ground |
| Pin 7 | RA0 — GPIO / AN0 |
| Pin 8 | RA1 — GPIO / AN1 |
| Pin 9 | RA2 — GPIO / AN2 |
| Pin 10 | RA3 — GPIO / AN3 |
| Pin 11 | RA4 — GPIO / AN4 |
| Pin 12 | RA5 — GPIO / AN5 |
| Pin 13 | RA6 — GPIO / AN6 |
| Pin 14 | RA7 — GPIO / AN7 |
| Pin 15 | AVDD — Analog Power |
| Pin 16 | AVSS — Analog Ground |
| Pin 17 | RB0 — GPIO / AN8 / PGED1 |
| Pin 18 | RB1 — GPIO / AN9 / PGEC1 |
| Pin 19 | RB2 — GPIO / AN10 |
| Pin 20 | RB3 — GPIO / AN11 |
| Pin 21 | RB4 — GPIO / AN12 |
| Pin 22 | RB5 — GPIO / AN13 |
| Pin 23 | RB6 — GPIO / AN14 / PGED2 |
| Pin 24 | RB7 — GPIO / AN15 / PGEC2 |
| Pin 25 | VSS — Ground |
| Pin 26 | RC1 — GPIO / T2CK |
| Pin 27 | RC2 — GPIO / T3CK |
| Pin 28 | RC3 — GPIO / T4CK |
| Pin 29 | RC4 — GPIO / T5CK |
| Pin 30 | VDD — Power Supply |
| Pin 31 | OSC1 — Crystal Oscillator Input |
| Pin 32 | OSC2 — Crystal Oscillator Output |
| Pin 33 | VSS — Ground |
| Pin 34 | RD0 — GPIO |
| Pin 35 | RD1 — GPIO |
| Pin 36 | RD2 — GPIO |
| Pin 37 | RD3 — GPIO |
| Pin 38 | RD4 — GPIO |
| Pin 39 | RD5 — GPIO |
| Pin 40 | RD6 — GPIO |
| Pin 41 | RD7 — GPIO |
| Pin 42 | VSS — Ground |
| Pin 43 | RE0 — GPIO |
| Pin 44 | RE1 — GPIO |
| Pin 45 | RE2 — GPIO |
| Pin 46 | RE3 — GPIO |
| Pin 47 | RE4 — GPIO |
| Pin 48 | RE5 — GPIO |
| Pin 49 | RE6 — GPIO |
| Pin 50 | RE7 — GPIO |
| Pin 51 | RF3 — GPIO / U2RX |
| Pin 52 | RF4 — GPIO / U2TX |
| Pin 53 | RF5 — GPIO / U3RX |
| Pin 54 | RF6 — GPIO / U3TX |
| Pin 55 | RF7 — GPIO |
| Pin 56 | RF8 — GPIO |
| Pin 57 | VDD — Power Supply |
| Pin 58 | VSS — Ground |
| Pin 59 | D+ — USB D+ |
| Pin 60 | D- — USB D- |
| Pin 61 | VBUS — USB VBUS Detect |
| Pin 62 | VDD — Power Supply |
| Pin 63 | VSS — Ground |
| Pin 64 | EP — Exposed Thermal Pad (must be soldered to ground) |
Typical Applications
PIC32MX450F128HT-I/RG is suitable for 6 applications: Industrial Control Systems, USB Peripherals and HID Devices, Automotive Body Electronics, Home Appliances and White Goods, Consumer Electronics HMI, IoT Edge Sensor Hubs.
Industrial Control Systems
The PIC32MX450F128HT-I/RG fits industrial control because it combines 80 MHz MIPS32 M4K performance with 2.3-3.6V operation and an industrial -40C to +85C temperature range. Its 28 ADC channels handle multi-sensor analog acquisition, while 2 UART, 2 SPI/I2S, and 2 I2C interfaces connect to motor drivers, displays, and PLC expansion modules. With 128 KB Flash, the MCU hosts a real-time OS like FreeRTOS plus Modbus or EtherNet/IP protocol libraries. Used in PLCs, factory sensor hubs, and process controllers, it replaces 16-bit DSPICs with higher code density and faster interrupt response.
Recommended
USB Peripherals and HID Devices
The PIC32MX450F128HT-I/RG integrates USB 2.0 Full-Speed OTG with on-chip transceiver, eliminating external components for keyboard, mouse, and CDC-class applications. Running at 80 MHz, it handles USB enumeration plus HID report handling with low interrupt overhead. With 128 KB Flash, the part stores USB stacks like Microchip Harmony plus application firmware. Used in USB barcode scanners, custom HID input devices, and USB-to-UART bridges, it provides a single-chip solution without external PHY.
Recommended
Automotive Body Electronics
The PIC32MX450F128HT-I/RG supports automotive body networks via integrated CAN 2.0B module, plus LIN via UART. Note: the 'I' grade (-40C to +85C) is industrial-grade, NOT AEC-Q100, so it suits non-safety body modules like interior lighting, climate control, and seat controllers where AEC-Q100 is not mandated. With 53 I/O, the MCU drives multiple LED arrays, keypads, and motor loads via FET drivers. The 64-QFN with exposed pad supports reflow assembly typical for automotive ECUs.
Recommended
Home Appliances and White Goods
The PIC32MX450F128HT-I/RG serves home appliances like washing machines, dishwashers, and induction cookers where 80 MHz performance, ADC sensing, and PWM outputs handle motor and user-interface functions. The 28 ADC channels monitor temperature, motor current, and water level; 5 timers generate PWM for motor speed and inverter control. With 32 KB SRAM, the MCU buffers display frames and handles real-time control loops. Industrial temperature rating suits laundry-room and kitchen environments.
Recommended
Consumer Electronics HMI
The PIC32MX450F128HT-I/RG drives HMI applications like smart-home control panels, audio volume knobs, and remote controllers with TFT or segment displays. Its parallel master port connects to TFT LCDs at high throughput, while SPI/I2S interfaces drive audio codecs for haptic feedback or sound playback. With 80 MHz MIPS32 core and 128 KB Flash, it runs touch-sensing libraries plus LVGL graphics, making it suitable for thermostat panels and appliance user interfaces.
Recommended
IoT Edge Sensor Hubs
The PIC32MX450F128HT-I/RG acts as an IoT edge hub connecting wired sensors to wireless MCUs like ESP32 via UART/SPI. Its 28 ADC channels aggregate analog sensor inputs, and the 2 I2C buses connect digital sensors like accelerometers and temperature ICs. With CAN and USB OTG, it bridges industrial sensor networks to gateways. The 128 KB Flash hosts protocol translation firmware (e.g., Modbus to JSON), making it suitable for industrial IoT data concentrators.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F128HT-I/RG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F128H-I/RG | PIC32MX450F128HT-I/MR | PIC32MX450F128H-I/MR |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (RG) 9x9 mm | 64-QFN (RG) 9x9 mm - same | 64-QFN (RG) 9x9 mm - same | 64-QFN (RG) 9x9 mm - same |
| Core | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz | MIPS32 M4K 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| Operating Voltage | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray |
| ADC Channels | 28 | 28 | 28 | 28 |
Key Differentiators
- Highest peripheral density in PIC32MX3/4 family at 128 KB Flash tier (vs PIC32MX340F128H-80I/MR)
- Higher ADC channel count for multi-input sensing (vs PIC32MX360F256L-80V/BG)
- Industrial-grade 64-QFN package fits compact designs (vs PIC32MX270F256B-I/SP)
Design Notes
The PIC32MX450F128HT-I/RG has multiple VDD/VSS pins (typically 4-5 pairs) for core logic and I/O rings. Place a 100 nF decoupling capacitor within 2 mm of every VDD/VSS pair. Add a single 4.7-10 uF bulk capacitor near the IC on the main VDD rail. The 64-QFN exposed thermal pad (EP) must be soldered to a ground copper pour, providing both thermal dissipation and a low-impedance ground return.
The 64-QFN 9x9 mm package with exposed thermal pad dissipates heat primarily through the EP. With typical 80 MHz operation drawing ~70 mA active, dissipation is ~230 mW at 3.3V, well within package rating. For industrial -40C to +85C operation, the EP copper area should be at least 1 square inch on a 4-layer PCB to keep junction temperature rise below 15C.
The PIC32MX450F128HT is rated 80 MHz maximum, not 120 MHz like PIC32MX4XX variants - configuring PLL for 120 MHz on this 450 variant may cause Flash read errors. The I2C pins are 5V-tolerant only when the supply is above 2.5V; ensure pull-ups do not exceed VDD. The USB D+/D- lines require 90 ohm differential impedance - route them as a matched pair with no stubs.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C) only - NOT AEC-Q100 qualified. For automotive applications choose dsPIC33 or PIC32MX automotive variants.
