PIC32MX450F128H-V/RG - 32-bit MCU, 80MHz, 128KB Flash, USB | Microchip
料号： PIC32MX450F128H-V/RG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.12 | $61.20 |
| 100 | $5.4 | $540.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.32 | $4,320.00 |
PIC32MX450F128H-V/RG 概述
A microcontroller (MCU) is an integrated circuit that combines a CPU core, RAM, non-volatile Flash memory, and a wide range of peripheral interfaces in a single silicon die. PIC32 devices from Microchip extend the well-known 8-bit PIC architecture into the 32-bit MIPS M4K domain, providing 1.56 DMIPS per MHz (up to 150 DMIPS at 120 MHz). Within the broader taxonomy, this part sits in the category: microcontroller -> 32-bit MCU -> MIPS RISC MCU -> PIC32 family -> PIC32MX3/4 sub-family, which targets Audio/Graphics/Touch (HMI) and USB applications.
Key features include 128 KB Flash with 16 KB RAM, a 10-bit ADC up to 1 Msps with up to 28 channels, 5 PWM outputs, 6 DMA channels for CPU-offload data movement, and a CTMU peripheral for capacitive touch sensing. The device operates from 2.3 V to 3.6 V, supports an industrial temperature range of -40C to +105C in the V (extended) variant, and integrates a real-time clock-calendar, a 16-bit timer/counter, and JTAG/ICSP debug ports.
The architecture leverages a 5-stage pipeline MIPS M4K core with hardware multiply/divide and a unified prefetch cache, delivering deterministic interrupt response at 80 MHz. The integrated USB 2.0 full-speed PHY, paired with DMA-driven endpoints, enables HID, CDC, MSD, and vendor-class stacks without external transceivers, while the CTMU simplifies touch-button and slider designs.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), low-cost audio accessories with I2S, capacitive-touch human-machine interfaces, USB-to-UART bridges, embedded web/IoT nodes, and consumer-electronics control panels. For each of these, the 128 KB Flash is sufficient for USB stacks plus application firmware.
When designing with this part, pay attention to the decoupling network: at least 10 uF bulk plus 0.1 uF ceramics per VDD/VSS pair is recommended, and the exposed pad must be soldered to the ground plane for both thermal dissipation and signal integrity. For USB applications, route the D+/D- traces as a 90-ohm differential pair.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop engineering reference.
直接替换替代料： PIC32MX450F128H-V/RG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC32MX450F128H-V/RG （相同外形与封装尺寸） ——差异在于 Core Architecture, Package, SPI / I2S, USB, ADC.
快速对比工具——选择替代料号进行并排对比：
PIC32MX450F128H-I/RG
✅ 直接替换✓ 有现货
$2.79 / 个
查看数据手册 →PIC32MX450F128HT-V/RG
✅ 直接替换✓ 有现货
$4.42 / 个
查看数据手册 →PIC32MX450F256H-V/RG
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX460F128L-V/RG
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX440F128H-V/RG
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX330F064H-V/RG
✅ 直接替换✓ 有现货
$3.65 / 个
查看数据手册 →PIC32MX450F128H-V/RG 最大额定值与电气特性
| Core | MIPS32 M4K |
| Core Architecture | 32-bit RISC |
| Family | PIC32MX3/4 |
| Series | PIC32MX450 |
| Maximum CPU Speed | 80 MHz |
| Performance | up to 100 MIPS (DMIPS) |
| Program Flash Memory | 128 KB (128K x 8) |
| Data SRAM | 16 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature Range (V) | -40C to +105C |
| 封装 | 64-QFN (RG) 9x9 mm with exposed pad |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| I2C | 2 channels |
| SPI / I2S | 2 channels |
| UART | 4 channels |
| ADC | 10-bit, up to 1 Msps, up to 28 channels |
| PWM Outputs | 5 channels |
| DMA Channels | 6 |
| Timers | 5 x 16-bit / 2 x 32-bit |
| CTMU | Yes (Charge Time Measurement Unit) |
| Debug Interface | JTAG / ICSP |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC32MX450F128H-V/RG 引脚配置
| 引脚 1 | RG15 — GPIO RG15 |
| 引脚 2 | VDD — Power supply (2.3-3.6 V) |
| 引脚 3 | RP0/PMD0 — Remappable I/O / PMP data 0 |
| 引脚 4 | RP1/PMD1 — Remappable I/O / PMP data 1 |
| 引脚 5 | RP2/PMD2 — Remappable I/O / PMP data 2 |
| 引脚 6 | RP3/PMD3 — Remappable I/O / PMP data 3 |
| 引脚 7 | RP4/PMD4 — Remappable I/O / PMP data 4 |
| 引脚 8 | RP5/PMD5 — Remappable I/O / PMP data 5 |
| 引脚 9 | VSS — Ground |
| 引脚 10 | RP6/PMD6 — Remappable I/O / PMP data 6 |
| 引脚 11 | RP7/PMD7 — Remappable I/O / PMP data 7 |
| 引脚 12 | RP8/PMD8 — Remappable I/O / PMP data 8 |
| 引脚 13 | RP9/PMD9 — Remappable I/O / PMP data 9 |
| 引脚 14 | RP10/PMD10 — Remappable I/O / PMP data 10 |
| 引脚 15 | RP11/PMD11 — Remappable I/O / PMP data 11 |
| 引脚 16 | VSS — Ground |
| 引脚 17 | VDD — Power supply (2.3-3.6 V) |
| 引脚 18 | RP12/PMD12 — Remappable I/O / PMP data 12 |
| 引脚 19 | RP13/PMD13 — Remappable I/O / PMP data 13 |
| 引脚 20 | RP14/PMD14 — Remappable I/O / PMP data 14 |
| 引脚 21 | RP15/PMD15 — Remappable I/O / PMP data 15 |
| 引脚 22 | VSS — Ground |
| 引脚 23 | VDD — Power supply (2.3-3.6 V) |
| 引脚 24 | AN0/C2INA — Analog input 0 / Comparator 2 input A |
| 引脚 25 | AN1/C2INB — Analog input 1 / Comparator 2 input B |
| 引脚 26 | AN2/C2INC/C3INA — Analog input 2 / Comparator input |
| 引脚 27 | AN3/C2IND/C3INB — Analog input 3 / Comparator input |
| 引脚 28 | AN4 — Analog input 4 |
| 引脚 29 | AN5 — Analog input 5 |
| 引脚 30 | AN6 — Analog input 6 |
| 引脚 31 | AN7 — Analog input 7 |
| 引脚 32 | AN8 — Analog input 8 |
| 引脚 33 | AN9 — Analog input 9 |
| 引脚 34 | AN10 — Analog input 10 |
| 引脚 35 | AN11 — Analog input 11 |
| 引脚 36 | VSS — Ground |
| 引脚 37 | VDD — Power supply (2.3-3.6 V) |
| 引脚 38 | AN12 — Analog input 12 |
| 引脚 39 | AN13 — Analog input 13 |
| 引脚 40 | AN14 — Analog input 14 |
| 引脚 41 | AN15 — Analog input 15 |
| 引脚 42 | OA1OUT — Op-amp 1 output |
| 引脚 43 | OA1IN- — Op-amp 1 inverting input |
| 引脚 44 | OA1IN+ — Op-amp 1 non-inverting input |
| 引脚 45 | VREF+/CVREF+/AN16 — Voltage reference / analog input 16 |
| 引脚 46 | VREF-/CVREF-/AN17 — Voltage reference / analog input 17 |
| 引脚 47 | AVDD — Analog supply voltage |
| 引脚 48 | AVSS — Analog ground |
| 引脚 49 | SOSCO/T1CK — Secondary oscillator output / Timer 1 clock |
| 引脚 50 | SOSCI/RPB4 — Secondary oscillator input / GPIO |
| 引脚 51 | OSC1/RC1 — Crystal oscillator input |
| 引脚 52 | OSC2/RC2 — Crystal oscillator output |
| 引脚 53 | VSS — Ground |
| 引脚 54 | VDD — Power supply (2.3-3.6 V) |
| 引脚 55 | D+ — USB D+ differential data line |
| 引脚 56 | D- — USB D- differential data line |
| 引脚 57 | VBUS — USB VBUS sense input |
| 引脚 58 | VUSB — USB internal regulator output (decouple 1uF) |
| 引脚 59 | TMS/RA0 — JTAG TMS / GPIO RA0 |
| 引脚 60 | TCK/RA1 — JTAG TCK / GPIO RA1 |
| 引脚 61 | TDI/RA2 — JTAG TDI / GPIO RA2 |
| 引脚 62 | TDO/RA3 — JTAG TDO / GPIO RA3 |
| 引脚 63 | MCLR — Master clear reset (active-low) |
| 引脚 64 | RA4 — GPIO RA4 |
典型应用
PIC32MX450F128H-V/RG 适用于 7 应用s: USB HID Peripheral Devices, Capacitive Touch HMI Panels, USB-to-UART Bridge Modules, Low-Cost Audio Accessories with I2S, Embedded IoT Sensor Nodes, Consumer Electronics Control Panels, Industrial USB Data Acquisition Modules.
USB HID Peripheral Devices
The PIC32MX450F128H-V/RG is purpose-built for USB HID class peripherals such as keyboards, mice, game controllers, custom HID input devices, and programmable HID interfaces. Its integrated USB 2.0 full-speed (12 Mbps) Device/Host/OTG controller with on-chip PHY eliminates external transceiver cost, while the 80 MHz MIPS M4K core plus 128 KB Flash is sufficient to run Microchip's MPLAB Harmony USB stack with HID class driver and application firmware concurrently. With 16 KB SRAM, the device handles HID report buffers without CPU stall. Engineers typically pair this part with a USB connector, ESD protection array on D+/D-, and route the differential pair as a 90-ohm impedance line. The exposed pad of the 64-QFN package must be soldered to ground for thermal and signal-integrity reasons. For commercial HID products, this part delivers full USB compliance at a sub-$5 price point in volume.
推荐
Capacitive Touch HMI Panels
The PIC32MX450F128H-V/RG is ideal for capacitive touch human-machine interface (HMI) panels in appliances, industrial controls, and consumer electronics. Its integrated Charge Time Measurement Unit (CTMU) provides a constant-current source that, combined with the 10-bit ADC and mTouch libraries, measures capacitance changes with sub-pF resolution - enabling reliable touch buttons, sliders, and proximity sensors without external analog ICs. The 28 ADC channels support multiple sensing electrodes on a single panel. With 128 KB Flash, the firmware has headroom for advanced gesture algorithms and noise compensation. The 80 MHz CPU executes touch-scanning loops in real time while servicing USB and other peripherals concurrently. For designs that need both touch HMI and USB connectivity (e.g., touch-based USB control surfaces), the PIC32MX450F128H-V/RG is a single-chip solution, reducing BOM and PCB area compared to discrete touch controllers plus a separate MCU.
推荐
USB-to-UART Bridge Modules
USB-to-UART bridge modules - used by engineers for debugging, ISP programming, and embedded serial connectivity - leverage the PIC32MX450F128H-V/RG's USB 2.0 full-speed peripheral and four UART channels. Running at 80 MHz, the MCU enumerates as a CDC (Communications Device Class) device and forwards bytes between USB and UART with deterministic latency under 1 ms at typical 115200 baud rates. The 128 KB Flash accommodates USB stack plus CDC class driver plus buffering, while 16 KB SRAM supports FIFO-based flow control on each UART channel. With four UARTs, the same module can serve as a multi-channel debug bridge for embedded target boards. Industrial-grade reliability comes from the extended temperature range (-40C to +105C) of the V/RG variant. Compared to the legacy FTDI FT232R, this Microchip part offers a familiar MPLAB toolchain and lower BOM cost in volume.
推荐
Low-Cost Audio Accessories with I2S
The PIC32MX450F128H-V/RG's two I2S interfaces enable cost-sensitive audio accessories such as USB microphones, USB audio DAC adapters, and Bluetooth/I2S audio bridges. The integrated USB 2.0 full-speed controller delivers stereo 16-bit/48 kHz audio over USB (synchronous mode) without an external DSP. The I2S peripheral can drive external DACs (e.g., PCM1794A) or accept ADC inputs from MEMS microphones. With 128 KB Flash, designers can implement USB Audio Class 1.0 plus I2S configuration plus basic audio processing. The 80 MHz MIPS M4K core provides sufficient MIPS to handle USB isochronous transfers with low CPU overhead. The 64-QFN RG 9x9 mm footprint supports compact dongle-style form factors. Compared to dedicated USB audio ICs, this approach gives firmware-tunable behavior (volume curves, EQ presets) and reuse of the same MPLAB toolchain across product variants.
推荐
Embedded IoT Sensor Nodes
Low-power embedded IoT sensor nodes benefit from the PIC32MX450F128H-V/RG's combination of peripherals and MIPS performance. The 80 MHz CPU reads sensors over I2C (e.g., temperature, humidity), SPI (e.g., accelerometers), or ADC channels (e.g., analog sensors), buffers data in the 16 KB SRAM, and transmits via USB or UART. The 6 DMA channels offload sensor reads without CPU intervention, enabling deterministic sample timing at low system clock rates. The CTMU peripheral enables additional touch or proximity sensing for occupancy detection in smart-home nodes. With 128 KB Flash, the firmware fits a small RTOS plus application logic plus a USB or serial protocol stack. The industrial-grade -V/RG temperature range ensures reliable operation in outdoor enclosures. The 64-QFN RG package keeps the node footprint under 100 mm^2, suitable for coin-cell or USB-powered deployments.
推荐
Consumer Electronics Control Panels
Consumer electronics control panels - from smart-home hubs to white-goods user interfaces - commonly use the PIC32MX450F128H-V/RG as a cost-optimized display and input controller. The MCU drives LED matrices or character LCDs via GPIO/PWM (5 PWM channels), reads button matrices and rotary encoders via the CTMU and ADC, and communicates with the main application processor over UART, SPI, or USB. The USB peripheral also enables firmware updates via DFU (Device Firmware Upgrade) without external bootloader hardware. With 128 KB Flash, designers can implement USB DFU, button debouncing, LED animations, and serial protocol bridging concurrently. The extended -40C to +105C temperature range of the V/RG variant supports appliances and outdoor enclosures. The 64-QFN RG 9x9 mm package supports thin form factors typical of wall-mount panels.
推荐
Industrial USB Data Acquisition Modules
Industrial data acquisition (DAQ) modules that stream analog/digital signals to a host PC over USB benefit from the PIC32MX450F128H-V/RG's 10-bit ADC up to 1 Msps with 28 channels, USB 2.0 full-speed streaming, and 80 MHz CPU. The ADC samples analog signals at rates up to 1 Msps; the DMA channels move ADC results into SRAM without CPU load; the USB endpoint streams data to the host at up to 12 Mbps. The 128 KB Flash supports USB stack plus DAQ firmware plus calibration tables; the 16 KB SRAM holds several milliseconds of buffered samples. The V/RG temperature grade (-40C to +105C) supports factory-floor deployment. Compared to dedicated USB DAQ ASICs, this approach lets engineers implement custom channel configurations, scaling factors, and signal conditioning in firmware. The 64-QFN RG footprint fits small DIN-rail or USB-stick form factors.
推荐
推荐产品汇总
工程参考数据： PIC32MX450F128H-V/RG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC32MX450F128H-I/RG | PIC32MX450F128HT-V/RG | PIC32MX450F256H-V/RG | PIC32MX460F128L-V/RG | PIC32MX440F128H-V/RG |
|---|---|---|---|---|---|---|
| Package | 64-QFN (RG) 9x9 mm | 64-QFN (RG) - same | 64-QFN (RG) - same | 64-QFN (RG) - same | 64-QFN (RG) - same | 64-QFN (RG) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| Maximum CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| USB 2.0 Full-Speed | Yes (Device/Host/OTG) | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| CAN Bus | No | No | No | No | Yes | No |
关键差异点
- Integrated USB 2.0 Full-Speed OTG with on-chip PHY （对比 PIC32MX440F128H-V/RG)
- Extended temperature range up to +105C (V grade) （对比 PIC32MX450F128H-I/RG)
- Doubled Flash (256 KB) option in same 64-QFN RG package （对比 PIC32MX450F256H-V/RG)
设计说明
The PIC32MX450F128H-V/RG requires a stable 3.3 V supply at 2.3-3.6 V. Place at least one 10 uF bulk capacitor (e.g., tantalum or ceramic) at the board's 3.3 V input plus one 0.1 uF ceramic decoupling capacitor adjacent to each VDD/VSS pair on the MCU (typically 4-5 pairs on the 64-QFN package). The VUSB pin needs a 1 uF ceramic decoupling capacitor for the internal USB regulator. Inrush from USB VBUS must be limited to the device's specifications.
Route the USB D+/D- lines as a 90-ohm differential pair with matched length, keep them short (typically <50 mm), and isolate them from switching signals and high-current traces. The exposed thermal pad (EP) of the 64-QFN package MUST be soldered to a continuous ground copper pour on the top layer, with thermal vias to inner ground planes, both for electrical grounding and for thermal dissipation. Place decoupling capacitors as close to the IC pins as the PCB layout allows to minimize parasitic inductance.
Do not enable the JTAG pins without configuring them - on power-up the default is JTAG enabled, which can conflict with GPIO usage. Always configure JTAG-disabled (or remap) early in startup. For the CTMU touch peripheral, calibrate the constant-current source with the actual PCB parasitic capacitance before measuring touch events, otherwise readings drift significantly. When using the USB peripheral, ensure the VBUS sense is correctly wired or the device will not enumerate.
For designs using the 80 MHz core with USB full-speed, place a clock-cleaning ferrite bead on the secondary oscillator supply if SOSC is used (for RTC), and route high-frequency clocks (POSC outputs) over an unbroken ground plane to avoid harmonics coupling into analog inputs. The 10-bit ADC achieves 1 Msps only with proper analog front-end layout; use a separate AVDD/AVSS plane where possible and decouple with 10 uF + 0.1 uF adjacent to AVDD/AVSS pins.
合规信息
RoHS compliant per Microchip product page. AEC-Q100 not applicable for this part - not automotive qualified. Halogen-free status not stated in available data; flagged as unknown.
