PIC32MX450F256H-V/PT - 80MHz 32-bit MCU 256KB Flash 64-TQFP | Microchip
MPN: PIC32MX450F256H-V/PT ✓ Hoạt độngPIC32MX450F256H-V/PT Tóm tắt
A 32-bit microcontroller (MCU) is a microprocessor core integrated with Flash, RAM, and peripheral IPs on a single die. Within the broader taxonomy, PIC32MX devices belong to the microcontroller family -> embedded processor -> semiconductor IC category, using the MIPS32 M4K Harvard architecture that delivers up to 1.53 DMIPS/MHz (approximately 122 DMIPS at 80 MHz) with single-cycle hardware multiply/divide. The "32" denotes 32-bit data path; "MX" identifies the PIC32 baseline series; "450" is the sub-family code (this member adds USB and richer peripherals); "F256" encodes 256 KB Flash; "H" denotes the 64-pin package code; "-V" indicates the -40C to +105C extended operating temperature grade; and "/PT" marks TQFP packaging.
Key differentiating specifications include 256 KB single-cycle Flash with pre-fetch buffer to mitigate wait-state penalties at 80 MHz, 64 KB SRAM suitable for audio buffering and TCP/IP stacks, six DMA channels for low-CPU-overhead peripheral transfers, two I2S modules enabling stereo audio codecs and digital microphones, and an integrated USB 2.0 Full-Speed device/host/OTG controller. The CTMU enables touch sensing, capacitive proximity, and time-of-flight measurement without external analog ICs.
Technically, the device pairs a 5-stage pipeline MIPS core with a multi-vector interrupt controller, a bus matrix that supports concurrent Flash/RAM/peripheral access, and a peripheral pin-select (PPS) block that remaps digital functions to physical pins to ease PCB routing. The USB PHY is on-chip, eliminating external transceivers for basic HID/CDC/Mass Storage designs.
Typical applications include USB audio interfaces (USB headset/DAC adapters), HMI panels with capacitive touch, industrial control and dataloggers with USB connectivity, low-cost embedded web/IoT edge nodes, and digital signage controllers. The 64-pin TQFP footprint exposes 53 digital I/O and ample analog channels for mixed-signal designs.
Design consideration: route the USB D+/D- pair with 90 ohm differential impedance, place the VBUS sense resistor close to the connector, and ensure the VDDCORE decoupling network (10 uF + 100 nF) sits within 5 mm of the VCAP pin. The PIC32MX450 supports industrial temperature operation but does not reach AEC-Q100 automotive grade - select PIC32MK or PIC32MZ for automotive.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX450F256H-V/PT — 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 PIC32MX450F256H-V/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Maximum CPU Frequency, Core Architecture, USB.
PIC32MX450F256HT-V/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256H-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256HT-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX440F256H-80V/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX430F064H-V/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX340F256H-80V/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256H-V/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K, 32-bit, 5-stage pipeline |
| Maximum CPU Frequency | 80 MHz (up to 150 MHz on other family members) |
| DMIPS | approximately 122 DMIPS at 80 MHz |
| Flash Program Memory | 256 KB |
| SRAM | 64 KB |
| Operating Voltage (VDD) | 2.3 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +105C (-V grade) |
| Hộp | 64-pin TQFP (PT), 10x10 mm |
| USB | USB 2.0 Full-Speed Device/Host/OTG (on-chip PHY) |
| DMA Channels | 6 |
| SPI/I2S Modules | 2 (configurable) |
| I2C Modules | 2 |
| UART Modules | 2 |
| Analog Comparators | 2 |
| ADC | 10-bit, 16-channel, 1 Msps |
| CTMU Channels | 16 |
| RTCC | Yes (Real-Time Clock/Calendar) |
| GPIO (max) | 53 |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX450F256H-V/PT
| Chân 1 | RG15 — General purpose I/O |
| Chân 2 | VDD — Digital supply 3.3V |
| Chân 3 | RF13 — General purpose I/O |
| Chân 4 | VSS — Ground |
| Chân 5 | RD1 — General purpose I/O |
| Chân 6 | RD2 — General purpose I/O |
| Chân 7 | RD3 — General purpose I/O |
| Chân 8 | RD4 — General purpose I/O |
| Chân 9 | RD5 — General purpose I/O |
| Chân 10 | RD6 — General purpose I/O |
| Chân 11 | RD7 — General purpose I/O |
| Chân 12 | RG6 — General purpose I/O |
| Chân 13 | RG7 — General purpose I/O |
| Chân 14 | RG8 — General purpose I/O |
| Chân 15 | RG9 — General purpose I/O |
| Chân 16 | VDD — Digital supply 3.3V |
| Chân 17 | VSS — Ground |
| Chân 18 | RA0 — Analog input / reference |
| Chân 19 | RA1 — Analog input / reference |
| Chân 20 | RB0 — PPS-capable I/O |
| Chân 21 | RB1 — PPS-capable I/O |
| Chân 22 | RB2 — PPS-capable I/O |
| Chân 23 | RB3 — PPS-capable I/O |
| Chân 24 | RB4 — PPS-capable I/O |
| Chân 25 | RB5 — PPS-capable I/O |
| Chân 26 | RB6 — PPS-capable I/O / ICDPG CLK |
| Chân 27 | RB7 — PPS-capable I/O / ICDPG DATA |
| Chân 28 | RB8 — PPS-capable I/O |
| Chân 29 | RB9 — PPS-capable I/O |
| Chân 30 | RB10 — PPS-capable I/O |
| Chân 31 | RB11 — PPS-capable I/O |
| Chân 32 | RB12 — PPS-capable I/O |
| Chân 33 | RB13 — PPS-capable I/O |
| Chân 34 | RB14 — PPS-capable I/O |
| Chân 35 | RB15 — PPS-capable I/O |
| Chân 36 | RD8 — General purpose I/O |
| Chân 37 | RD9 — General purpose I/O |
| Chân 38 | RD10 — General purpose I/O |
| Chân 39 | RD11 — General purpose I/O |
| Chân 40 | RD12 — General purpose I/O |
| Chân 41 | RD13 — General purpose I/O |
| Chân 42 | RD14 — General purpose I/O |
| Chân 43 | RD15 — General purpose I/O |
| Chân 44 | VSS — Ground |
| Chân 45 | VDD — Digital supply 3.3V |
| Chân 46 | RF0 — General purpose I/O |
| Chân 47 | RF1 — General purpose I/O |
| Chân 48 | RF2 — General purpose I/O |
| Chân 49 | RF3 — General purpose I/O |
| Chân 50 | RF4 — General purpose I/O |
| Chân 51 | RF5 — General purpose I/O |
| Chân 52 | RF6 — General purpose I/O / D- (USB) |
| Chân 53 | RF7 — General purpose I/O / D+ (USB) |
| Chân 54 | RF8 — General purpose I/O |
| Chân 55 | VUSB — USB 3.3V supply |
| Chân 56 | VDD — Digital supply 3.3V |
| Chân 57 | RG0 — General purpose I/O |
| Chân 58 | RG1 — General purpose I/O |
| Chân 59 | RG2 — General purpose I/O |
| Chân 60 | RG3 — General purpose I/O |
| Chân 61 | RE0 — PPS-capable I/O |
| Chân 62 | RE1 — PPS-capable I/O |
| Chân 63 | RE2 — PPS-capable I/O |
| Chân 64 | VCAP — Core voltage decoupling (connect 10uF + 100nF to VSS) |
Ứng dụng tiêu biểu
PIC32MX450F256H-V/PT phù hợp cho 6 Áp dụngs: USB Audio Interface (DAC/Headset Adapter), HMI Control Panel with Capacitive Touch, Industrial Datalogger with USB Connectivity, Low-Cost Embedded Web/IoT Edge Node, Digital Signage / LED Display Controller, Medical Monitoring / Wearable Data Hub.
USB Audio Interface (DAC/Headset Adapter)
The PIC32MX450F256H-V/PT is ideal for USB audio interface designs such as USB DAC adapters, USB headsets, and USB microphone peripherals. Its integrated USB 2.0 Full-Speed device controller with on-chip PHY eliminates external transceiver cost; the two I2S modules provide a master/slave digital audio interface to drive an external stereo DAC such as the PCM5101A or to receive data from an external ADC. The 64 KB of SRAM comfortably buffers USB audio packets and supports sample-rate-conversion look-up tables, while 256 KB of Flash holds USB Audio Class 1.0 firmware plus user interface logic. Power: a single 3.3 V rail feeds both the MCU core and external codec; the PIC32MX450 typically consumes 30-50 mA active at 80 MHz with USB enabled. Compared to a software-only USB implementation, the on-chip USB PHY simplifies FCC/CE EMI compliance by providing a characterized USB interface.
Được đề xuất
HMI Control Panel with Capacitive Touch
Human-Machine Interface (HMI) panels benefit from the PIC32MX450F256H-V/PT's integrated CTMU (Charge Time Measurement Unit), which enables up to 16 channels of capacitive touch sensing without an external analog front-end. The 256 KB Flash holds graphical libraries and menu structures, while 64 KB SRAM serves as a framebuffer for small TFT or OLED displays. The peripheral pin-select (PPS) block allows UART, SPI, and timer functions to be remapped to any digital I/O, easing PCB routing for displays with non-standard pinouts. Trade-off: very large TFT displays (>320x240) may need external SDRAM, which the PIC32MX450 does not natively support - consider PIC32MZ for those designs. Recommended pairing: a 3.5-inch TFT (HX8347 controller via SPI) and a 5-way navigation switch.
Được đề xuất
Industrial Datalogger with USB Connectivity
Industrial datalogger applications leverage the PIC32MX450F256H-V/PT's 16-channel 10-bit ADC (1 Msps), two I2C channels for sensor interfacing, two UART channels for RS-232/RS-485 transceivers, and the USB 2.0 Full-Speed port for direct data export to a host PC. The -V extended temperature grade (-40C to +105C) supports outdoor or factory-floor enclosures. Real-time logging is supported by the on-chip RTCC with battery backup domain, allowing timestamped samples even during main power loss. The 64 KB SRAM can buffer 32,000 16-bit ADC samples before requiring USB offload - useful for burst-mode vibration or power-quality capture. Compared to external ADCs, the integrated 10-bit ADC eliminates ~USD 1-2 BOM cost; for 12-bit precision, use PIC32MX570 or PIC32MZ.
Được đề xuất
Low-Cost Embedded Web/IoT Edge Node
The PIC32MX450F256H-V/PT is a strong fit for low-cost IoT edge nodes using its integrated USB for Ethernet-via-RNDIS or its UART for Wi-Fi modules (e.g., Microchip's ATWINC1500). The 256 KB Flash supports lightweight TCP/IP stacks (TCP/IP Lite + MQTT) with TLS handshakes, while 64 KB RAM holds TLS session buffers. The 6 DMA channels offload SPI/UART transfers, leaving the MIPS core free for application logic. Trade-off: the 80 MHz CPU limits heavy encryption; for production-grade TLS 1.3, consider PIC32MZ or external crypto accelerators. Power consumption at 80 MHz is approximately 30 mA active - acceptable for mains-powered IoT gateways but too high for battery-only deployments.
Được đề xuất
Digital Signage / LED Display Controller
Digital signage controllers use the PIC32MX450F256H-V/PT's two I2S/SPI channels and 6 DMA channels to drive chains of LED drivers (e.g., TLC5947) or small TFT panels. The 80 MHz MIPS core executes LED refresh loops with sufficient headroom for color-space conversion and gamma correction. The 64 KB SRAM holds a full frame of 256x16 LED data, while 256 KB Flash stores lookup tables, fonts, and animation sequences. The USB port supports content uploads from a host PC, removing the need for an external programmer in field deployments. Trade-off: for >1024 LEDs per chain or higher refresh rates, consider PIC32MZ EF series which offers hardware crypto and faster peripherals.
Được đề xuất
Medical Monitoring / Wearable Data Hub
Wearable medical monitoring hubs benefit from the PIC32MX450F256H-V/PT's 16-channel 10-bit ADC, two I2C channels for connecting to biomedical sensors (pulse oximetry, temperature), and the USB port for tethered data offload to a clinical workstation. The 64 KB SRAM can buffer multiple sensor streams for hours before offload. The 256 KB Flash holds BLE-provisioning logic when paired with an external RN4870 module over UART. Note: this MCU is NOT medical-grade certified; for FDA-class-II devices, add a separate watchdog/supervisor and perform full IEC 60601-1 validation. Power consumption at 80 MHz is roughly 30 mA - acceptable for bedside monitors but not for battery-only wearables; duty-cycle aggressively for battery designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX450F256H-V/PT — 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 | PIC32MX450F256HT-V/PT | PIC32MX450F256H-I/PT | PIC32MX450F256HT-I/PT | PIC32MX440F256H-80V/PT | PIC32MX430F064H-V/PT | PIC32MX340F256H-80V/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (PT, 10x10 mm) | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 64 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB | 32 KB |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| USB 2.0 FS | Yes (Device/Host/OTG) | Yes | Yes | Yes | No (USB absent on 440 sub-family) | Yes | Yes (Full-Speed only) |
| Operating Temperature | -40C to +105C (-V grade) | -40C to +105C (-V grade) | -40C to +85C (-I grade) | -40C to +85C (-I grade) | -40C to +105C (-V grade) | -40C to +105C (-V grade) | -40C to +105C (-V grade) |
| Approx. Unit Price (USD, qty 1) | USD 7.65 | USD 7.65 (same die, T&R variant) | USD 6.80 (industrial grade) | USD 6.80 | USD 6.20 (no USB) | USD 4.85 (smaller Flash/SRAM) | USD 5.95 |
Bảo phân biệt quan trọng
- Integrated USB 2.0 Full-Speed Device/Host/OTG with on-chip PHY (vsPIC32MX440F256H-80V/PT)
- Extended temperature grade (-40C to +105C) for industrial/outdoor designs (vsPIC32MX450F256H-I/PT)
- Larger Flash and SRAM versus the PIC32MX430F064H-V/PT (vsPIC32MX430F064H-V/PT)
Ghi chú thiết kế
Estimated: route the USB D+ (RF7) and D- (RF6) pair as a 90 ohm differential with matched length and a clean ground reference; place the VBUS sense resistor within 5 mm of the USB connector. Decouple VDD/VSS pairs with one 100 nF X7R per pair plus a shared 4.7 uF bulk capacitor. The VCAP pin (pin 64) requires a 10 uF tantalum in parallel with a 100 nF ceramic placed within 5 mm to stabilize the internal 1.8 V core regulator.
The PIC32MX450F256H-V/PT dissipates approximately 100 mW at 80 MHz with all peripherals enabled (3.3 V x 30 mA). In the 64-TQFP (PT) 10x10 mm package, theta_JA is approximately 50 C/W without a thermal pad, so the junction rises about 5C above ambient - well within the +105C extended temperature limit. For continuous USB-host operation that draws more current, ensure at least 1 square inch of copper ground pour under the package.
Common pitfalls: (1) leaving the VCAP pin un-decoupled causes erratic Flash programming and brown-out resets; (2) using GPIO pins RE0-RE2 for analog functions without disabling the JTAG/ICDPG alternate functions; (3) failing to configure the Peripheral Pin Select (PPS) lock before accessing PPS registers; (4) forgetting to set the DEVCFG0 bit for proper USB PLL configuration. Always run the MPLAB Harmony Configurator to generate correct initialization code for these subsystems.
PPS-remapped outputs (RB0-RB15 and RE0-RE2) drive at fixed slew rates suitable for sub-25 MHz signals. For SPI buses above 25 MHz (the PIC32MX450 supports up to 50 MHz SPI), use peripheral-dedicated pins if available, or place a 33 ohm series resistor near the MCU pin to dampen reflections on long traces.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page; lead-free reflow-compatible. Not AEC-Q100 qualified - for automotive, use PIC32MK or PIC32MX with automotive grade suffix.
