PIC32MX450F128HT-I/PT - 80MHz 32-bit MCU 128KB Flash USB | Microchip
MPN： PIC32MX450F128HT-I/PT ✓ 啟用中PIC32MX450F128HT-I/PT 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), and a rich set of peripherals (ADC, timers, communication interfaces) into one device. Within the broader semiconductor taxonomy, the PIC32MX family belongs to microcontrollers -> embedded processors -> ICs. The MIPS M4K core implements a 32-bit RISC architecture, and at 80 MHz the device delivers 1.56 DMIPS/MHz-class performance, well above legacy 8-bit PIC MCUs while remaining code-compatible with the established PIC ecosystem.
Key features of the PIC32MX450F128HT-I/PT include integrated USB 2.0 Full-Speed On-The-Go (OTG) with dedicated DMA, a 10-bit 1 Msps ADC, two analog comparators with programmable reference, RTCC hardware calendar/clock, and Configurable Logic Cell (CLC) blocks for glue-logic replacement. The PIC32MX3/4 peripheral set is widely documented across hundreds of application notes and frameworks such as MPLAB Harmony 3.
Typical applications include USB peripherals (HID, CDC, MIDI, custom-class), industrial control front-ends, multi-channel sensor aggregation, and consumer audio subsystems that benefit from I2S. The USB OTG and high channel-count DMA also make this MCU attractive for Human-Interface Devices and low-latency control loops.
When designing with this part, plan for the 2.5 V / 3.3 V supply domain and add a 32-bit differential capacitor on VDD/VSS, plus an external 12 MHz or 24 MHz crystal for USB operation. Firmware should be developed in MPLAB X IDE with Harmony 3 to allow software to reuse the USB stack, DMA drivers, and TCP/IP libraries that ship in the framework.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing, replacement, and bring-up of the PIC32MX450F128HT-I/PT.
直接替換替代品，適用於 PIC32MX450F128HT-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX450F128HT-I/PT （相同外形與佔位） — 差異在於 Package, Operating Temperature, ADC, Core Architecture, DMA Channels.
PIC32MX450F128H-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX450F128HT-I/RG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX450F128HT-120I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX470F512H-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX440F128H-80I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX450F128HT-I/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 80 MHz |
| Program Flash Memory | 128 KB |
| Data SRAM | 32 KB |
| Operating Voltage Range | 2.5 V / 3.3 V |
| USB Interface | USB 2.0 Full-Speed OTG |
| ADC | 10-bit 1 Msps |
| Analog Comparators | 2 |
| I2C Modules | 2 |
| SPI / I2S Modules | 2 |
| UART Modules | 2 |
| DMA Channels | 28 |
| Timers | 5 x 16-bit |
| 封裝 | 64-pin TQFP (PT) 10x10 mm |
| 工作溫度 | -40C to +85C (industrial) |
| 安裝類型 | Surface Mount |
| MSL 等級 | MSL3 (per Microchip) |
| Lead-Free / RoHS | Lead-Free / RoHS compliant |
PIC32MX450F128HT-I/PT 腳位配置
| 腳位 1 | RB14 — General I/O / PWM |
| 腳位 2 | RB15 — General I/O / PWM |
| 腳位 3 | VDD — Core supply 2.5 V / 3.3 V |
| 腳位 4 | RD8 — General I/O |
| 腳位 5 | RD9 — General I/O |
| 腳位 6 | RD10 — General I/O |
| 腳位 7 | RD11 — General I/O |
| 腳位 8 | RD12 — General I/O |
| 腳位 9 | RD13 — General I/O |
| 腳位 10 | RD14 — General I/O |
| 腳位 11 | RD15 — General I/O |
| 腳位 12 | VSS — Ground |
| 腳位 13 | RC12 — General I/O |
| 腳位 14 | RC13 — General I/O |
| 腳位 15 | RC14 — General I/O |
| 腳位 16 | RC15 — General I/O |
| 腳位 17 | RA0 — Analog / I/O |
| 腳位 18 | RA1 — Analog / I/O |
| 腳位 19 | RA2 — Analog / I/O |
| 腳位 20 | RA3 — Analog / I/O |
| 腳位 21 | RA4 — Analog / I/O |
| 腳位 22 | RA5 — Analog / I/O |
| 腳位 23 | VSS — Ground |
| 腳位 24 | RA6 — Analog / I/O |
| 腳位 25 | RA7 — Analog / I/O |
| 腳位 26 | RB0 — Analog / I/O |
| 腳位 27 | RB1 — Analog / I/O |
| 腳位 28 | RB2 — Analog / I/O |
| 腳位 29 | RB3 — Analog / I/O |
| 腳位 30 | RB4 — Analog / I/O |
| 腳位 31 | RB5 — Analog / I/O |
| 腳位 32 | VSS — Ground |
| 腳位 33 | RB7 — Analog / I/O |
| 腳位 34 | RB8 — Analog / I/O |
| 腳位 35 | RB9 — Analog / I/O |
| 腳位 36 | RB10 — Analog / I/O |
| 腳位 37 | RB11 — Analog / I/O |
| 腳位 38 | RB12 — Analog / I/O |
| 腳位 39 | RB13 — Analog / I/O |
| 腳位 40 | VDD — Core supply 2.5 V / 3.3 V |
| 腳位 41 | RC0 — General I/O |
| 腳位 42 | RC1 — General I/O |
| 腳位 43 | RC2 — General I/O |
| 腳位 44 | RC3 — General I/O |
| 腳位 45 | RC4 — General I/O |
| 腳位 46 | RC5 — General I/O |
| 腳位 47 | RC6 — General I/O |
| 腳位 48 | RC7 — General I/O |
| 腳位 49 | RC8 — General I/O |
| 腳位 50 | RC9 — General I/O |
| 腳位 51 | VSS — Ground |
| 腳位 52 | RC10 — General I/O |
| 腳位 53 | RC11 — General I/O |
| 腳位 54 | RD0 — General I/O |
| 腳位 55 | RD1 — General I/O |
| 腳位 56 | RD2 — General I/O |
| 腳位 57 | RD3 — General I/O |
| 腳位 58 | RD4 — General I/O |
| 腳位 59 | RD5 — General I/O |
| 腳位 60 | VSS — Ground |
| 腳位 61 | VDD — Core supply 2.5 V / 3.3 V |
| 腳位 62 | OSC1 — Crystal oscillator input |
| 腳位 63 | OSC2 — Crystal oscillator output |
| 腳位 64 | MCLR — Master clear / reset (active low) |
典型應用
PIC32MX450F128HT-I/PT 適用於 6 應用s: USB HID Peripheral Device, Industrial Sensor Aggregator, USB Audio Class 1.0 Streaming, Consumer MIDI Controller, Low-Cost IoT Edge Node, HMI Front Panel Controller.
USB HID Peripheral Device
The PIC32MX450F128HT-I/PT's integrated USB 2.0 Full-Speed On-The-Go controller with a dedicated DMA channel makes it a natural fit for USB Human Interface Devices (HID). The MCU enumerates as a keyboard, mouse, gamepad, or custom HID without an external USB PHY, and the 32 KB SRAM sustains HID report buffers plus a small RTOS. At 80 MHz, the MIPS M4K core handles HID polling, LED animation, and key debounce with substantial CPU headroom. Designers typically route D+/D- directly to the USB connector, add 15k pull-down resistors, and rely on the MPLAB Harmony 3 USB stack to shorten firmware development. Compared with discrete STM32F0 USB parts, the PIC32MX450 provides a comparable feature set at a competitive distributor price.
推薦
Industrial Sensor Aggregator
The PIC32MX450F128HT-I/PT integrates a 10-bit 1 Msps ADC plus a 28-channel DMA engine, which is well matched to multi-sensor industrial aggregation (temperature, pressure, flow, 4-20 mA loops). The 80 MHz MIPS core runs averaging, linearization, and Modbus RTU framing, while DMA offloads the ADC scans to keep the CPU responsive. The industrial -40C to +85C temperature range supports factory-floor deployment. With 128 KB Flash the MCU accommodates a full Modbus stack plus a small web server for IIoT gateways. Compared with 8-bit PIC16 alternatives, the PIC32MX450 quadruples throughput and adds USB for local HMI.
推薦
USB Audio Class 1.0 Streaming
The PIC32MX450F128HT-I/PT's USB Full-Speed peripheral and dual SPI/I2S blocks support USB Audio Class 1.0 streaming at 24-bit/48 kHz. The 32 KB RAM buffers small audio frames, while the dedicated USB DMA minimizes jitter. The MIPS M4K core handles USB isochronous transfers and I2S transmission to an external DAC such as a PCM5102A. Compared with 16-bit PIC24 alternatives, the 32-bit core reduces CPU load by ~40% and supports larger descriptor tables. The PT suffix 64-pin TQFP exposes enough I/O to add buttons, an OLED, and rotary control all on one board.
推薦
Consumer MIDI Controller
The PIC32MX450F128HT-I/PT runs USB MIDI Class Device firmware natively through its OTG controller, accepting encoder and button inputs while transmitting MIDI messages over USB. The 5 16-bit timers support debounce-free scanning of a 4x4 button matrix plus 4 rotary encoders without CPU intervention when paired with DMA. At 80 MHz, the device handles 16-channel polyphonic control without dropped messages. Compared with dedicated MIDI chipsets, the PIC32MX450 adds USB host capability, simplifying firmware for USB MIDI Host products that control external sound modules.
推薦
Low-Cost IoT Edge Node
The PIC32MX450F128HT-I/PT integrates USB and an ADC, making it a low-cost edge node for IoT bridges (e.g., serial-to-USB gateways, BLE-aware bridge). The MCU aggregates sensor data, formats JSON over USB CDC, and forwards to a host PC or Raspberry Pi gateway. The 32 KB SRAM hosts a small TLS stack for cloud attachment. Compared with ESP32 variants, the PIC32MX450 offers tighter latency determinism and industrial temperature range for harsh environments. The PIC32MX450 also supports Real-Time Clock Calendar (RTCC) hardware for time-stamped event logging.
推薦
HMI Front Panel Controller
The PIC32MX450F128HT-I/PT drives a small TFT or OLED HMI with USB or UART back-channel, displaying status, settings, and sensor readouts. The 80 MHz MIPS core renders simple fonts and updates the display without DMA, while the dedicated USB supports firmware updates over USB MSD. Compared with low-cost 8-bit PIC16 designs, the PIC32MX450 delivers smoother refresh rates and can host a uGUI or lvgl port. The 64-pin TQFP exposes enough pins for a 16-bit parallel display plus a 4x4 keypad and rotary encoder, all read via DMA without CPU loading.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX450F128HT-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX450F128H-I/PT | PIC32MX450F128HT-I/RG | PIC32MX450F128HT-120I/PT | PIC32MX470F512H-I/PT | PIC32MX440F128H-80I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin QFN (9x9) - DIFFERENT | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Maximum CPU Clock | 80 MHz | 80 MHz | 80 MHz | 100 MHz | 120 MHz | 80 MHz |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 512 KB | 128 KB |
| Data SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 128 KB | 32 KB |
| USB Interface | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed Device only |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
主要差異化特點
- Integrated USB 2.0 Full-Speed OTG with dedicated DMA (對比PIC32MX440F128H-80I/PT)
- 28-channel DMA engine for parallel peripheral streaming (對比PIC32MX470F512H-I/PT)
- Lower price than 512 KB Flash MX470 variant (對比PIC32MX470F512H-I/PT)
設計說明
The PIC32MX450F128HT-I/PT operates from a single 2.5 V or 3.3 V rail. Decouple each VDD/VSS pair with a 0.1 uF ceramic capacitor placed within 5 mm of the pin. For USB designs, use a dedicated ferrite bead or LDO to isolate the MCU VDD from the USB rail noise; the USB transceiver draws up to 25 mA in active mode. A 10 uF bulk capacitor near the MCU is recommended to handle the in-rush current during USB enumeration.
Avoid tying MCLR directly to VDD without a 10k pull-up and a 100 nF decoupling capacitor; otherwise the MCU may latch up during power-up. Use an external 12 MHz or 24 MHz crystal on OSC1/OSC2 with 18-22 pF load capacitors when USB is required (USB needs a 48 MHz USB clock derived from the primary oscillator). The TRACE/EMUC/EMUD pins must be left floating or pulled to known states in production to avoid leakage. Lastly, set the JTAG/TRACE disable fuse for production builds to prevent debug-port access.
Place the 64-pin TQFP on a 4-layer PCB with a continuous ground plane beneath the device. Keep the D+/D- USB traces 90 ohms differential, length-matched to within 150 mil, and route them over a continuous ground reference. The 12 MHz crystal traces should be as short as possible and surrounded by a ground guard ring to reduce EMI. Add a 1k pull-up on D+ to indicate Full-Speed USB connection to the host. For industrial designs, add ESD protection diodes (e.g., USBLC6-2SC6) on the D+/D- lines for IEC 61000-4-2 compliance.
Estimated: at 80 MHz with peripherals active, the PIC32MX450F128HT-I/PT draws ~30 mA from a 3.3 V supply, dissipating ~100 mW. With a 64-pin TQFP thermal resistance of approximately 50 C/W, the junction-to-ambient rise is ~5C above ambient - well below the 85C industrial limit. For extended-temperature designs (-40C to +125C), provide modest copper pours (1 sq inch) to ensure adequate heat spreading. The MCU does not require a heatsink at typical operating loads.
合規資訊
RoHS and REACH compliant per Microchip product page. Lead-free finish. Not AEC-Q100 qualified - choose PIC32MX1xx/2xx automotive grade for AEC-Q100 needs.
