PIC32MX450F256H-V/PT - 80MHz 32-bit MCU 256KB Flash 64-TQFP | Microchip
N.º de pieza: PIC32MX450F256H-V/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.65 | $7,65 |
| 10 | $6.83 | $68,30 |
| 100 | $5.92 | $592,00 |
| 500 | $5.31 | $2.655,00 |
| 1.000 | $4.78 | $4.780,00 |
PIC32MX450F256H-V/PT Descripción general
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.
Alternativas directas para PIC32MX450F256H-V/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC32MX450F256H-V/PT (mismo factor de forma y huella) — difiere en Package, ADC, Maximum CPU Frequency, Core Architecture, USB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC32MX450F256HT-V/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC32MX450F256H-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC32MX450F256HT-I/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.85 / unidad
Ver hoja de datos →PIC32MX440F256H-80V/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC32MX430F064H-V/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.1 / unidad
Ver hoja de datos →PIC32MX340F256H-80V/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.4 / unidad
Ver hoja de datos →PIC32MX450F256H-V/PT Valores máximos y características eléctricas
| 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 |
| Temperatura de funcionamiento | -40C to +105C (-V grade) |
| Encapsulado | 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 |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de PIC32MX450F256H-V/PT
| Pin 1 | RG15 — General purpose I/O |
| Pin 2 | VDD — Digital supply 3.3V |
| Pin 3 | RF13 — General purpose I/O |
| Pin 4 | VSS — Ground |
| Pin 5 | RD1 — General purpose I/O |
| Pin 6 | RD2 — General purpose I/O |
| Pin 7 | RD3 — General purpose I/O |
| Pin 8 | RD4 — General purpose I/O |
| Pin 9 | RD5 — General purpose I/O |
| Pin 10 | RD6 — General purpose I/O |
| Pin 11 | RD7 — General purpose I/O |
| Pin 12 | RG6 — General purpose I/O |
| Pin 13 | RG7 — General purpose I/O |
| Pin 14 | RG8 — General purpose I/O |
| Pin 15 | RG9 — General purpose I/O |
| Pin 16 | VDD — Digital supply 3.3V |
| Pin 17 | VSS — Ground |
| Pin 18 | RA0 — Analog input / reference |
| Pin 19 | RA1 — Analog input / reference |
| Pin 20 | RB0 — PPS-capable I/O |
| Pin 21 | RB1 — PPS-capable I/O |
| Pin 22 | RB2 — PPS-capable I/O |
| Pin 23 | RB3 — PPS-capable I/O |
| Pin 24 | RB4 — PPS-capable I/O |
| Pin 25 | RB5 — PPS-capable I/O |
| Pin 26 | RB6 — PPS-capable I/O / ICDPG CLK |
| Pin 27 | RB7 — PPS-capable I/O / ICDPG DATA |
| Pin 28 | RB8 — PPS-capable I/O |
| Pin 29 | RB9 — PPS-capable I/O |
| Pin 30 | RB10 — PPS-capable I/O |
| Pin 31 | RB11 — PPS-capable I/O |
| Pin 32 | RB12 — PPS-capable I/O |
| Pin 33 | RB13 — PPS-capable I/O |
| Pin 34 | RB14 — PPS-capable I/O |
| Pin 35 | RB15 — PPS-capable I/O |
| Pin 36 | RD8 — General purpose I/O |
| Pin 37 | RD9 — General purpose I/O |
| Pin 38 | RD10 — General purpose I/O |
| Pin 39 | RD11 — General purpose I/O |
| Pin 40 | RD12 — General purpose I/O |
| Pin 41 | RD13 — General purpose I/O |
| Pin 42 | RD14 — General purpose I/O |
| Pin 43 | RD15 — General purpose I/O |
| Pin 44 | VSS — Ground |
| Pin 45 | VDD — Digital supply 3.3V |
| Pin 46 | RF0 — General purpose I/O |
| Pin 47 | RF1 — General purpose I/O |
| Pin 48 | RF2 — General purpose I/O |
| Pin 49 | RF3 — General purpose I/O |
| Pin 50 | RF4 — General purpose I/O |
| Pin 51 | RF5 — General purpose I/O |
| Pin 52 | RF6 — General purpose I/O / D- (USB) |
| Pin 53 | RF7 — General purpose I/O / D+ (USB) |
| Pin 54 | RF8 — General purpose I/O |
| Pin 55 | VUSB — USB 3.3V supply |
| Pin 56 | VDD — Digital supply 3.3V |
| Pin 57 | RG0 — General purpose I/O |
| Pin 58 | RG1 — General purpose I/O |
| Pin 59 | RG2 — General purpose I/O |
| Pin 60 | RG3 — General purpose I/O |
| Pin 61 | RE0 — PPS-capable I/O |
| Pin 62 | RE1 — PPS-capable I/O |
| Pin 63 | RE2 — PPS-capable I/O |
| Pin 64 | VCAP — Core voltage decoupling (connect 10uF + 100nF to VSS) |
Aplicaciones típicas
PIC32MX450F256H-V/PT es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC32MX450F256H-V/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Integrated USB 2.0 Full-Speed Device/Host/OTG with on-chip PHY (frente a PIC32MX440F256H-80V/PT)
- Extended temperature grade (-40C to +105C) for industrial/outdoor designs (frente a PIC32MX450F256H-I/PT)
- Larger Flash and SRAM versus the PIC32MX430F064H-V/PT (frente a PIC32MX430F064H-V/PT)
Notas de diseño
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.
Información de cumplimiento
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.
