PIC32MX450F256LT-V/PF - 32-bit MCU 256KB Flash 80MHz TQFP-100
MPN: PIC32MX450F256LT-V/PF ✓ Hoạt độngPIC32MX450F256LT-V/PF Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals onto one die. Within the product taxonomy, a microcontroller falls under integrated circuits -> microcontrollers -> 32-bit microcontrollers, and PIC32MX parts specifically target cost-sensitive embedded applications that need 32-bit throughput but can be served by the legacy MIPS M4K core rather than a modern Cortex-M class core.
Key differentiating features include 256 KB Flash and 64 KB SRAM, 80 MHz operation with 100 DMIPS throughput, USB 2.0 full-speed On-The-Go (OTG) support, and 5V-tolerant I/O for industrial signaling levels. The CTMU enables touch and capacitive sensing, while the RTCC supports battery-backed timekeeping. Compared to lower-end PIC32MX1/2 devices, the PIC32MX4 adds parallel master port and a higher pin-count package suitable for parallel bus interfaces.
Architecturally, the PIC32MX450F256L uses the MIPS32 M4K core with 5-stage pipeline, single-cycle multiply and hardware divide, plus a 7-bit prefetch buffer that boosts Flash throughput. The 100 MHz / 80 MHz bus matrix keeps DMA and CPU accesses non-blocking, which is critical when USB, ADC and SPI/I2S operate concurrently. The 256 KB Flash is partitioned for self-programming and bootloader use cases.
Typical applications include USB peripherals, industrial control panels, graphical user interfaces with parallel LCD, capacitive touch human-machine interfaces, motor control (via PWM and comparators), and point-of-sale terminals. The wide I/O count supports external memory buses and multiple serial channels simultaneously.
When designing with the PIC32MX450F256LT-V/PF, ensure the 80 MHz operating frequency and 2.5-3.6 V supply range are respected, and use a 4-layer PCB with a solid ground plane for the 100-pin TQFP thermal pad. For migration paths, the PIC32MX450F256L family offers other pin-count and temperature grade options sharing the same die.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX450F256LT-V/PF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC32MX450F256LT-V/PF (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core, I2C, USB.
PIC32MX450F256L-I/PF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256HT-V/PF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256LT-I/PF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX350F256LT-V/PF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX370F512LT-I/PF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256LT-V/PF Tỷ lệ tối đa & tính chất điện
| Core | MIPS32 M4K |
| Core Architecture | PIC32MX (32-bit) |
| Operating Frequency | 80 MHz |
| Performance | 100 DMIPS |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 64 KB |
| USB | USB 2.0 Full-Speed OTG |
| SPI/I2S | 2 channels |
| I2C | 2 channels |
| Analog Comparators | 2 |
| ADC | 10-bit (channel count not confirmed in verified web data) |
| RTCC | Yes (Real-Time Clock and Calendar) |
| CTMU | Yes (Charge Time Measurement Unit) |
| Hộp | 100-pin TQFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Điện áp cung cấp | 2.5 V to 3.6 V |
| Temperature Grade | -40C to +105C (V grade = automotive/industrial) |
| RoHS | Compliant |
Cấu hình chân PIC32MX450F256LT-V/PF
| Chân 1 | RG15 — General purpose I/O |
| Chân 2 | VDD — Supply voltage (3.3V) |
| Chân 3 | RP10/RD0 — Remappable peripheral / GPIO |
| Chân 4 | RP11/RD1 — Remappable peripheral / GPIO |
| Chân 5 | RP12/RD2 — Remappable peripheral / GPIO |
| Chân 6 | VSS — Ground |
| Chân 7 | RP13/RD3 — Remappable peripheral / GPIO |
| Chân 8 | RP14/RD4 — Remappable peripheral / GPIO |
| Chân 9 | RP15/RD5 — Remappable peripheral / GPIO |
| Chân 10 | RP16/RD6 — Remappable peripheral / GPIO |
| Chân 11 | RP17/RD7 — Remappable peripheral / GPIO |
| Chân 12 | VSS — Ground |
| Chân 13 | VDD — Supply voltage (3.3V) |
| Chân 14 | RA0 — PORTA bit 0 / analog |
| Chân 15 | RA1 — PORTA bit 1 / analog |
| Chân 16 | RA2 — PORTA bit 2 / analog |
| Chân 17 | RA3 — PORTA bit 3 / analog |
| Chân 18 | RA4 — PORTA bit 4 / analog |
| Chân 19 | RA5 — PORTA bit 5 / analog |
| Chân 20 | VSS — Ground |
| Chân 21 | RA6 — PORTA bit 6 |
| Chân 22 | RA7 — PORTA bit 7 |
| Chân 23 | RA8 — PORTA bit 8 |
| Chân 24 | RA9 — PORTA bit 9 |
| Chân 25 | RA10 — PORTA bit 10 |
| Chân 26 | RB0 — PORTB bit 0 / programming |
| Chân 27 | RB1 — PORTB bit 1 / programming |
| Chân 28 | RB2 — PORTB bit 2 |
| Chân 29 | RB3 — PORTB bit 3 |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Supply voltage (3.3V) |
| Chân 32 | RB4 — PORTB bit 4 |
| Chân 33 | RB5 — PORTB bit 5 |
| Chân 34 | RB6 — PORTB bit 6 / programming |
| Chân 35 | RB7 — PORTB bit 7 / programming |
| Chân 36 | RB8 — PORTB bit 8 |
| Chân 37 | RB9 — PORTB bit 9 |
| Chân 38 | RB10 — PORTB bit 10 |
| Chân 39 | RB11 — PORTB bit 11 |
| Chân 40 | VSS — Ground |
| Chân 41 | VDD — Supply voltage (3.3V) |
| Chân 42 | RB12 — PORTB bit 12 |
| Chân 43 | RB13 — PORTB bit 13 |
| Chân 44 | RB14 — PORTB bit 14 |
| Chân 45 | RB15 — PORTB bit 15 |
| Chân 46 | RC0 — PORTC bit 0 |
| Chân 47 | RC1 — PORTC bit 1 |
| Chân 48 | RC2 — PORTC bit 2 |
| Chân 49 | VSS — Ground |
| Chân 50 | VDD — Supply voltage (3.3V) |
| Chân 51 | RC3 — PORTC bit 3 |
| Chân 52 | RC4 — PORTC bit 4 |
| Chân 53 | RC5 — PORTC bit 5 |
| Chân 54 | RC6 — PORTC bit 6 |
| Chân 55 | RC7 — PORTC bit 7 |
| Chân 56 | RC8 — PORTC bit 8 |
| Chân 57 | RC9 — PORTC bit 9 |
| Chân 58 | VSS — Ground |
| Chân 59 | VDD — Supply voltage (3.3V) |
| Chân 60 | RC10 — PORTC bit 10 |
| Chân 61 | RC11 — PORTC bit 11 |
| Chân 62 | RC12 — PORTC bit 12 |
| Chân 63 | RC13 — PORTC bit 13 |
| Chân 64 | RC14 — PORTC bit 14 |
| Chân 65 | RC15 — PORTC bit 15 |
| Chân 66 | VSS — Ground |
| Chân 67 | VDD — Supply voltage (3.3V) |
| Chân 68 | RD8 — PORTD bit 8 |
| Chân 69 | RD9 — PORTD bit 9 |
| Chân 70 | RD10 — PORTD bit 10 |
| Chân 71 | RD11 — PORTD bit 11 |
| Chân 72 | RD12 — PORTD bit 12 |
| Chân 73 | RD13 — PORTD bit 13 |
| Chân 74 | VSS — Ground |
| Chân 75 | VDD — Supply voltage (3.3V) |
| Chân 76 | RD14 — PORTD bit 14 |
| Chân 77 | RD15 — PORTD bit 15 |
| Chân 78 | RF0 — PORTF bit 0 |
| Chân 79 | RF1 — PORTF bit 1 |
| Chân 80 | RE0 — PORTE bit 0 |
| Chân 81 | RE1 — PORTE bit 1 |
| Chân 82 | RE2 — PORTE bit 2 |
| Chân 83 | RE3 — PORTE bit 3 |
| Chân 84 | RE4 — PORTE bit 4 |
| Chân 85 | RE5 — PORTE bit 5 |
| Chân 86 | RE6 — PORTE bit 6 |
| Chân 87 | RE7 — PORTE bit 7 |
| Chân 88 | VSS — Ground |
| Chân 89 | VDD — Supply voltage (3.3V) |
| Chân 90 | RG0 — PORTG bit 0 |
| Chân 91 | RG1 — PORTG bit 1 |
| Chân 92 | RG2 — PORTG bit 2 |
| Chân 93 | RG3 — PORTG bit 3 |
| Chân 94 | RG6 — PORTG bit 6 |
| Chân 95 | RG7 — PORTG bit 7 |
| Chân 96 | RG8 — PORTG bit 8 |
| Chân 97 | RG9 — PORTG bit 9 |
| Chân 98 | VSS — Ground |
| Chân 99 | OSC1/RC0 — Crystal oscillator input |
| Chân 100 | OSC2/RC1 — Crystal oscillator output |
Ứng dụng tiêu biểu
PIC32MX450F256LT-V/PF phù hợp cho 7 Áp dụngs: USB Human Interface Device (HID) Peripherals, Industrial Control Panel with Capacitive Touch HMI, Motor Control with Comparators and PWM, Point-of-Sale (POS) Terminal Data Capture, Connected IoT Edge Device with USB Diagnostics, Audio Processing with USB Streaming, Automotive Dashboard Sub-display Module.
USB Human Interface Device (HID) Peripherals
The PIC32MX450F256LT-V/PF's integrated USB 2.0 Full-Speed OTG transceiver makes it ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. The 80 MHz MIPS32 M4K core (100 DMIPS) handles USB protocol stack, HID report generation, and debounce logic with margin to spare, and 64 KB SRAM accommodates descriptor tables plus input buffers. With 256 KB Flash, designers can host a full USB bootloader plus application in one device, enabling field firmware updates over USB. Compared to MCUs requiring an external USB PHY, the integrated transceiver reduces BOM cost and PCB area. Placed between the USB connector and the system logic, the MCU enumerates as a HID device with no external crystal beyond the standard 8 MHz primary oscillator. The trade-off is full-speed only (12 Mbps), which is sufficient for HID-class latency targets.
Được đề xuất
Industrial Control Panel with Capacitive Touch HMI
The PIC32MX450F256LT-V/PF's on-chip CTMU (Charge Time Measurement Unit) and parallel master port combine to support capacitive touch HMI panels with TFT LCDs. The CTMU drives a matrix of capacitive touch electrodes via charge-time measurement, eliminating external touch controller ICs, while the parallel master port streams pixel data to a graphical LCD without taxing the CPU. With 80 MHz core and 64 KB SRAM, the device can refresh a QVGA display at 60 fps while simultaneously sampling touch channels and running the HMI state machine. The -V temperature grade (-40C to +105C) supports factory-floor environments where equipment operates near motors or heaters. Typical use: a 5-inch TFT panel with 16 capacitive buttons, communicating to a PLC over UART or CAN. Power dissipation stays well below 100 mW at typical 3.3 V supply.
Được đề xuất
Motor Control with Comparators and PWM
The PIC32MX450F256LT-V/PF integrates two analog comparators, multiple PWM channels, and QEI peripherals for sensorless or sensored BLDC motor control in pumps, fans, and small appliances. The 80 MHz core executes field-oriented control (FOC) loops at 10-20 kHz with margin for CAN communication and housekeeping tasks. The 100-pin TQFP package provides dedicated PWM outputs tied to specific pin positions, and the 256 KB Flash comfortably hosts motor control libraries plus application logic. Compared to MCUs without integrated comparators, the on-chip comparators eliminate external op-amps for back-EMF sensing, reducing both BOM cost and PCB area. The -V temperature grade (-40C to +105C) tolerates the elevated ambient near power stages in motor compartments. Note that high-current switching requires careful PCB layout with isolated analog/digital ground planes.
Được đề xuất
Point-of-Sale (POS) Terminal Data Capture
The PIC32MX450F256LT-V/PF supports point-of-sale terminals that read magnetic stripe, barcode, NFC/RFID, and receipt printer interfaces simultaneously. Its 80 MHz MIPS32 M4K core handles the multi-protocol state machines needed for card readers and barcode decoders, while the dual SPI/I2S channels drive external peripherals like audio chips for beeps and prompts. With 256 KB Flash and 64 KB SRAM, the device hosts TCP/IP stacks, encryption routines, and printer drivers. The USB OTG port supports peripherals or hosts cash drawer triggers. The 100-pin TQFP package exposes enough I/O to interface with multiple reader heads. As of 2026, this line is now capable of USB peripherals typically found in retail environments with PCI-compliant firmware overlays.
Được đề xuất
Connected IoT Edge Device with USB Diagnostics
The PIC32MX450F256LT-V/PF suits connected IoT edge nodes that require USB-based firmware update, diagnostics, and configuration alongside primary wireless connectivity. The 256 KB Flash fits a TCP/IP stack plus application, and 64 KB SRAM supports TLS buffers and connection state. The USB OTG port provides a standard service interface for technicians to attach a laptop and run diagnostics, capture logs, or update firmware. The 80 MHz MIPS32 M4K core leaves compute headroom for sensor sampling, sample data, and HTTP/MQTT communication over an external Wi-Fi or Sub-GHz radio. The -V temperature grade supports outdoor or industrial cabinets. Trade-off: the USB port is full-speed only, so high-bandwidth peripherals like USB webcams are not feasible.
Được đề xuất
Audio Processing with USB Streaming
The PIC32MX450F256LT-V/PF's dual SPI/I2S channels and USB 2.0 FS OTG make it a viable host for USB audio streaming peripherals and DSP audio processors. The two SPI/I2S interfaces connect to external audio CODECs at up to 48 kHz sample rates, while USB FS (12 Mbps) supports mono/stereo PCM streams for headsets, USB microphones, or intercoms. The 80 MHz MIPS32 M4K core can execute lightweight DSP routines like filters or basic codecs in real time, and 64 KB SRAM buffers audio frames without dropouts. With 256 KB Flash, audio effect tables fit alongside USB stack. Compared to dedicated USB audio bridges, this part adds programmable DSP at marginal cost increase, useful for custom audio processing or voice effects.
Được đề xuất
Automotive Dashboard Sub-display Module
The PIC32MX450F256LT-V/PF's -V temperature grade (-40C to +105C) and 100-pin TQFP package suit automotive dashboard sub-display modules that show secondary information like HVAC status or trip computer data. The parallel master port streams pixels to a small TFT LCD, while the CTMU supports backlit capacitive switches around the display. The 80 MHz core refreshes the LCD and polls switch matrix concurrently, and 256 KB Flash fits graphics tables plus automotive diagnostics routines. The dual CAN support (when paired with the PIC32MX460 variant or external MCP2515) enables OBD-II connectivity. The USB OTG port serves as a factory programming and end-of-line test interface. Compared to lower-spec MCUs, this part provides automotive-grade temperature and integrated peripherals needed for in-cabin electronics.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX450F256LT-V/PF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC32MX450F256L-I/PF | PIC32MX450F256HT-V/PF | PIC32MX450F256LT-I/PF | PIC32MX350F256LT-V/PF | PIC32MX370F512LT-I/PF |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14) | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same |
| Operating Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | None | None |
| Temperature Grade | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +85C (I grade) |
| SPI/I2S | 2 | 2 | 2 | 2 | 2 | 2 |
| Approximate Unit Price (1pc) | $6.31 | $5.95 (est.) | $6.40 (est.) | $5.95 (est.) | $5.50 (est.) | $7.20 (est.) |
Bảo phân biệt quan trọng
- Higher memory capacity (256KB Flash, 64KB SRAM) versus base PIC32MX3 family (vsPIC32MX370F512LT-I/PF)
- Integrated USB 2.0 FS OTG with on-chip transceiver (vsPIC32MX350F256LT-V/PF)
- Wider -V temperature grade for industrial/automotive use (vsPIC32MX450F256L-I/PF)
- Parallel master port for direct LCD/CFRA grid connection (vsPIC32MX330F064LT-I/PF)
Ghi chú thiết kế
The PIC32MX450F256LT-V/PF operates from 2.5 V to 3.6 V with internal core regulation. Decouple each VDD/VSS pair with 100 nF X7R ceramic placed within 3 mm of the pin, plus a bulk 10 uF tantalum or polymer cap near the package. USB supply pins (VDDUSB) need an additional 1 uF and 100 nF pair for clean reference to the internal USB transceiver. The MCU draws roughly 30-50 mA at 80 MHz full-load; ensure your LDO can supply peak transients during USB enumeration without sagging below 3.0 V.
Use a 4-layer PCB with continuous ground plane under and around the 100-pin TQFP footprint (14x14 mm, 0.5 mm pitch). The exposed thermal pad on the TQFP must be soldered to a copper pour connected to ground for mechanical strength and thermal dissipation. Keep high-speed USB traces (D+/D-) length-matched and routed over a continuous ground plane with 90 ohm differential impedance. Avoid running noisy switching traces parallel to the crystal oscillator traces within 5 mm.
Do not exceed 80 MHz core clock - the Flash wait-state configuration must match the operating frequency or the MCU will fetch wrong instructions and crash. Do not leave the MCLR pin floating; tie it to VDD via 10 kohm or drive it directly for proper reset. The ICSP pins (PGECx/PGEDx) must be accessible for in-circuit programming, and the JTAG pins (TCK/TMS/TDO/TDI) must be left in their default state unless JTAG debugging is disabled in configuration bits. The USB D+/D- pins require 15 kohm pull-down resistors if the device operates as USB device.
Place the 8 MHz primary crystal within 8 mm of OSC1/OSC2 with short symmetric traces and guard ground. If using the internal 8 MHz RC, you can skip the crystal but USB full-speed requires the USB PLL reference to be within 50 ppm accuracy, which may demand a crystal. The RTCC crystal (32.768 kHz) requires similar care: short traces, guard ground, and a 6-10 pF load capacitor pair per the crystal datasheet. The analog inputs (ANx on PORTA) should be routed away from digital switching signals to avoid coupling.
USB 2.0 full-speed D+/D- traces require controlled 90 ohm differential impedance and length matching within 150 mil. Add a common-mode choke or ferrite bead if the USB connector is more than 25 mm from the MCU. The SPI bus signals can run at 25 MHz+; keep traces under 50 mm and add 22-33 ohm series resistors at the driver end for source termination. The parallel master port (PMADDR/PMDATA/PMRD/PMWR) signals drive a parallel LCD and should be length-matched if the bus runs above 20 MHz.
Thông tin tuân thủ
RoHS compliant per Microchip product page. -V temperature grade supports industrial/automotive environments but the part is not AEC-Q100 qualified - choose PIC32MX460 family variants for AEC-Q100 automotive requirements.
