PIC32MX450F128LT-I/PT - 32-bit 80MHz 128KB Flash MCU | Microchip
MPN： PIC32MX450F128LT-I/PT ✓ 啟用中PIC32MX450F128LT-I/PT 概覽
A microcontroller (MCU) is a single-chip computer that combines a CPU core, program and data memory, and configurable I/O peripherals. The PIC32MX family uses the MIPS32 M4K core, a 32-bit RISC architecture from Imagination Technologies that Microchip licenses - making PIC32MX a 32-bit performance step above the 8-bit PIC16/PIC18 and 16-bit PIC24 families, while sharing Microchip's MPLAB X IDE and Harmony framework ecosystem. Within the power management and embedded control hierarchy, PIC32MX MCUs sit between Cortex-M0/M0+ microcontrollers and Cortex-M3/M4 parts in both performance and cost.
Key features include 80 MHz core clock (up to 100 MHz in some family variants), 128 KB single-cycle Flash with live update support, 32 KB SRAM, 2 SPI/I2S ports, 2 I2C ports, 2 UART ports, a USB 2.0 full-speed device/host/OTG controller, 5 16-bit timers/counters, and a 28-channel 10-bit 1 Msps ADC. The wide 2.3V to 3.6V supply range simplifies single-rail designs from 3.3V lithium or USB-fed power trees.
Architecturally, the PIC32MX450 uses a 5-stage MIPS pipeline with hardware multiply/divide, single-cycle Flash read through a 128-bit wide prefetch buffer, and a dedicated DMA controller for peripheral-to-memory transfers without CPU intervention. The 80 MHz part variant is a power-optimized speed grade of the 100 MHz PIC32MX450 family, ideal for cost-sensitive applications that do not need maximum throughput.
Typical applications include USB peripherals (HID, CDC, mass storage), IoT edge nodes with TCP/IP stacks, industrial sensor hubs, consumer appliances with capacitive touch via the Peripheral Pin Select (PPS) feature, and 32-bit upgrade paths for legacy PIC24 or PIC32MX1/2 designs. The 100-pin TQFP package offers 78 usable I/O pins plus USB transceiver pins, sufficing for human-machine interface (HMI) panels and small graphics.
When designing with this device, leave a 1 MOhm pull-up on the TMS pin for reliable 4-wire JTAG operation, and follow Microchip's Section 2.0 "Guidelines for Getting Started with 32-bit MCUs" - especially the 10 uF bulk + 0.1 uF decoupling arrangement within 6 mm of each VDD/VSS pin pair to keep the ADC noise floor low. The PT suffix designates the 100-pin TQFP package.
This page synthesizes distributor pricing, drop-in PIC32MX alternatives, and practical design notes not found in a single datasheet chapter.
直接替換替代品，適用於 PIC32MX450F128LT-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： PIC32MX450F128LT-I/PT （相同外形與佔位） — 差異在於 ADC, Package, Mounting Type, Operating Temperature, USB.
PIC32MX450F128HT-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX440F256H-80I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX430F064HT-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX450F128HT-V/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX370F512LT-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX450F128LT-I/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Core Count | Single-core |
| Maximum Core Frequency | 80 MHz |
| Instruction Set Width | 32-bit |
| Flash Program Memory | 128 KB (128K x 8) |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| ADC | 10-bit, 28 channels, 1 Msps |
| Analog Comparators | 2 |
| SPI / I2S | 2 |
| I2C | 2 |
| UART | 2 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Timers | 5 x 16-bit |
| I/O Pins | 78 |
| 封裝 | 100-pin TQFP (12x12 mm), 0.40 mm pitch |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40 C to +85 C (Industrial) |
| DMA | Yes (4-channel) |
| Peripheral Pin Select (PPS) | Yes |
| Debug Interface | 4-wire JTAG / 2-wire ICSP |
| RoHS 狀態 | Compliant |
PIC32MX450F128LT-I/PT 100-pin tqfp (12x12 mm), 0.40 mm pitch 腳位配置指南
PIC32MX450F128LT-I/PT（100-pin tqfp (12x12 mm), 0.40 mm pitch 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC32MX450F128LT-I/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX450F128LT-I/PT 適用於 6 應用s: USB HID / CDC Peripherals, Industrial Sensor Hubs, Consumer Appliance HMI, IoT Edge Nodes, Motor Control and BLDC Drivers, 32-bit Migration from PIC24 / PIC32MX1.
USB HID / CDC Peripherals
The PIC32MX450F128LT-I/PT integrates a USB 2.0 full-speed Device/Host/OTG controller with on-chip transceiver and pull-up resistor generation, eliminating the need for an external FTDI bridge or USB serializer. With 128 KB Flash, the MCU can host the Microchip USB stack plus HID, CDC, and generic class drivers, and the 80 MHz MIPS32 M4K core provides enough throughput for full-speed 12 Mbps transfers. The 78 I/O pins plus PPS (Peripheral Pin Select) allow flexible USB D+/D- placement on any pin, simplifying PCB routing in custom HID keyboards, barcode scanners, and industrial data loggers.
推薦
Industrial Sensor Hubs
The PIC32MX450F128LT-I/PT is well suited to industrial multi-sensor aggregation nodes because it integrates a 28-channel 10-bit ADC with 1 Msps throughput, two SPI/I2S interfaces for digital MEMS sensors, two I2C ports for environmental sensors, and two UART channels for legacy RS-485 Modbus links. The 2.3-3.6 V supply tolerates 3.3 V regulated industrial rails. With DMA on peripheral-to-memory transfers, the 80 MHz core can sample multiple sensors without CPU intervention, freeing MIPS for filter algorithms and Modbus response generation.
推薦
Consumer Appliance HMI
With 78 I/O pins, PPS remapping, and 128 KB Flash for graphics libraries, the PIC32MX450F128LT-I/PT drives monochrome TFT and OLED HMI panels in appliances. The Peripheral Pin Select feature routes SPI, I2C, and UART peripherals to any of the 78 I/O pins, simplifying PCB layout for capacitive touch overlays, encoder inputs, and LED matrix drivers. The MIPS32 M4K core at 80 MHz renders simple menus and 1-bit-per-pixel graphics faster than 8-bit PIC16 or PIC18 parts. Code reuse from existing PIC32MX1/2 designs shortens development cycles.
推薦
IoT Edge Nodes
The PIC32MX450F128LT-I/PT is used as an IoT edge controller with TCP/IP over Wi-Fi (via external module) or Ethernet MAC-less serial-to-cloud bridges. With 128 KB Flash, Microchip's TCP/IP Stack (Net) and MQTT client libraries fit, while the 80 MHz MIPS core handles TLS handshakes and JSON parsing. The 2.3-3.6 V supply is friendly to battery or solar edge nodes. Sleep current down to microamp range (specific Iq not in verified snippets) supports battery-only deployments with periodic wake-up for sensor reading and cloud upload.
推薦
Motor Control and BLDC Drivers
With 5 16-bit timers and PWM outputs across the PIC32MX3/4 peripheral set, the PIC32MX450F128LT-I/PT can drive BLDC, stepper, or brushed DC motors in small-format appliances. The 80 MHz core performs FOC algorithms in real time with cycle-accurate PWM generation. The 28-channel 10-bit ADC samples current sense amplifiers and back-EMF signals synchronously with PWM, and the DMA engine reduces CPU load. Integrated comparators trigger fault detection within 30 ns, protecting power stages from overcurrent events.
推薦
32-bit Migration from PIC24 / PIC32MX1
Engineers migrating from 16-bit PIC24 or 32-bit PIC32MX1/2 designs can step up to the PIC32MX450F128LT-I/PT without leaving the 100-pin TQFP footprint. Code compiled in MPLAB X with the XC32 toolchain targets PIC32MX450 with minimal changes from PIC32MX1/2 sources. The PIC32MX450 retains the same Harmony 3 framework, PLIB peripheral libraries, and MCC configuration flow, preserving firmware investment. The 80 MHz variant is a cost-effective speed grade for designs that do not need the full 100 MHz of the MX450 family.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX450F128LT-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 | PIC32MX450F128HT-I/PT | PIC32MX440F256H-80I/PT | PIC32MX430F064HT-I/PT | PIC32MX450F128HT-V/PT | PIC32MX370F512LT-I/PT |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (PT) | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same | 100-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum Core Frequency | 80 MHz | 100 MHz | 80 MHz | 80 MHz | 100 MHz | 80 MHz |
| Flash Memory | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB | 512 KB |
| USB 2.0 FS | Yes (OTG) | Yes (OTG) | Yes (device) | Yes (device) | Yes (OTG) | No |
| Supply Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +105 C | -40 C to +85 C |
| 1-Piece Price (USD, as of 2026-10-03) | $6.10 | $6.40 | $6.85 | $5.20 | $7.10 | $7.40 |
主要差異化特點
- USB 2.0 Full-Speed OTG with on-chip transceiver (對比PIC32MX370F512LT-I/PT)
- Higher core clock headroom available at same pinout (對比PIC32MX440F256H-80I/PT)
- Larger Flash vs lower-cost siblings in same TQFP-100 footprint (對比PIC32MX430F064HT-I/PT)
設計說明
Per Microchip's PIC32MX3XX/4XX family datasheet Section 2.0 'Guidelines for Getting Started with 32-bit MCUs', place one 10 uF bulk capacitor and one 0.1 uF ceramic decoupling capacitor within 6 mm of every VDD/VSS pin pair. Place the 0.1 uF caps closest to the pins. Use a low-ESR ceramic (X7R or X5R) for the bulk to handle transient load steps when USB, ADC, and digital I/O switch simultaneously. A separate analog supply rail (AVDD) with its own ferrite bead and decoupling reduces ADC noise by 5-10 LSB in 10-bit conversions.
Route the 80 MHz system clock trace (EC or POSC output) over a continuous ground plane and keep it under 25 mm. The USB D+/D- traces require 90 ohm differential impedance with matched length within 150 mils to meet USB 2.0 full-speed signal integrity. Place the 27% series resistor on D+ close to the MCU per USB specification. JTAG TMS/TCK/TDO/TDI lines should each have a series ferrite or 100 ohm resistor near the MCU for EMI suppression during in-circuit programming.
Do not leave the MCLR pin floating - tie it through a 10 kOhm pull-up to VDD, or use Microchip's recommended 1 kOhm for high-noise industrial environments. Configure unused I/O pins as outputs driven low, not as inputs, to avoid shoot-through current. When using the internal 8 MHz Fast RC (FRC) oscillator, calibrate via the PLL after each reset using the FPLLIDIV/FPLLMULT registers - FRC drift over temperature can reach 2-3% without calibration. The peripheral pin select (PPS) lock bits must be cleared before reassigning peripherals between code modules, or the configuration write is silently ignored.
Estimated: at 80 MHz full-load with all peripherals active, the PIC32MX450F128LT-I/PT consumes approximately 60-80 mA (3.3 V x 0.07 A = ~230 mW). The 100-pin TQFP (PT) package has typical theta_JA of approximately 38-42 C/W on a standard 4-layer JEDEC test board. With junction-to-ambient of 40 C/W, the device can absorb the 230 mW without exceeding the 125 C junction limit up to about 85 C ambient. In high-temperature industrial enclosures, increasing copper pours around the exposed thermal pad or adding airflow extends safe operation.
合規資訊
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC32MX370F512H-I/PT or industrial-rated variants for harsh environments. Industrial temperature grade -I covers -40 C to +85 C.
