PIC32MX450F128HT-I/MR - 80MHz 32-bit MCU 128KB Flash | Microchip
Référence : PIC32MX450F128HT-I/MR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.42 | $4,42 |
| 10 | $4.12 | $41,20 |
| 100 | $3.61 | $361,00 |
| 500 | $3.18 | $1 590,00 |
| 1 000 | $2.81 | $2 810,00 |
PIC32MX450F128HT-I/MR Présentation
A 32-bit microcontroller (MCU) is an integrated circuit containing a 32-bit CPU core, volatile and non-volatile memory, and a rich set of programmable peripherals. PIC32MX MCUs from Microchip sit in the broader category of embedded microcontrollers, themselves a class of microprocessors tuned for deterministic real-time control. The PIC32MX family uses the MIPS32 M4K Harvard architecture, providing single-cycle multiplication and hardware Multiply-Accumulate (MAC) support for DSP-like workloads while retaining a low power budget.
Key features include 128 KB Flash with self-programming in-field upgrade support, 32 KB RAM, 5 UART, 2 SPI/I2S, 2 I2C, USB-OTG Full-Speed, 5 timers, 4-channel DMA, and 28 channels of 10-bit ADC providing 1 Msps conversion. The 80 MHz core delivers up to 1.53 DMIPS/MHz per the MIPS M4K pipeline, making the part suitable for embedded graphics, USB peripherals, and connectivity stacks.
Architecture-wise, the device combines 32-bit MIPS execution with Microchip's peripheral set, allowing seamless migration from PIC24/dsPIC33 code bases through Microchip's Harmony framework. An integrated 8-channel DMA engine moves data between peripherals and RAM without CPU intervention, freeing the core for control and stack processing. The 64-pin VQFN package exposes up to 49 user I/O pins.
Typical applications include USB peripherals (HID, CDC, MSD), industrial control with CAN-style timing, low-cost graphics HMI using PMP, embedded audio playback via I2S, and low-power connected sensors with USB charging. The industrial temperature range makes the part suitable for factory floor instrumentation.
Designers should route the four USB DP/DN lines as a 90-ohm differential pair with a precise 45 ohm series resistor at the device side, and place the VBUS/VUSB3V3 decoupling capacitor within 3 mm of the corresponding pin. The internal 8 MHz Fast RC oscillator can be used for USB operation but a calibrated 48 MHz is required for Full-Speed USB.
This page synthesizes distributor pricing, drop-in PIC32MX family alternatives, USB reference design notes, and DMA-driven design patterns not consolidated in a single manufacturer datasheet section.
Alternatives de remplacement direct pour PIC32MX450F128HT-I/MR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC32MX450F128HT-I/MR (même facteur de forme et même empreinte) — différant par Package, ADC, Operating Temperature, USB, Timers.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC32MX450F128H-I/MR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.1 / unité
Voir la fiche technique →PIC32MX350F256HT-I/MR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.55 / unité
Voir la fiche technique →PIC32MX370F512HT-V/MR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.61 / unité
Voir la fiche technique →PIC32MX270F512HT-50I/MR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.74 / unité
Voir la fiche technique →PIC32MX250F256HT-I/MR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.35 / unité
Voir la fiche technique →PIC32MX450F128HT-I/MR Valeurs maximales et caractéristiques électriques
| Core Architecture | MIPS32 M4K |
| Core Frequency | 80 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 49 |
| ADC | 10-bit, 28 channels, 1 Msps |
| Comparators | 2 analog comparators |
| UART | 5 |
| SPI / I2S | 2 (SPI with I2S mode) |
| I2C | 2 |
| USB | USB 2.0 Full-Speed OTG |
| Timers | 5 (16-bit) |
| DMA Channels | 4 |
| Température de fonctionnement | -40C to +85C (Industrial) |
| Boîtier | 64-VQFN (9x9 mm) |
| Type de montage | Surface Mount |
| Niveau MSL | 3 |
| Statut RoHS | Compliant |
Configuration des broches de PIC32MX450F128HT-I/MR
| Broche 1 | RB15 — I/O pin / AN15 / OC1 |
| Broche 2 | RB14 — I/O pin / AN14 / VBUSON |
| Broche 3 | RB13 — I/O pin / AN13 / PMA13 |
| Broche 4 | RB12 — I/O pin / PB12 |
| Broche 5 | RB11 — I/O pin / PB11 |
| Broche 6 | RB10 — I/O pin / CVREF |
| Broche 7 | RB9 — I/O pin / PMA9 |
| Broche 8 | RB8 — I/O pin / PMA8 |
| Broche 9 | RB7 — I/O pin / PMA7 |
| Broche 10 | RB6 — I/O pin / PMA6 |
| Broche 11 | RB5 — I/O pin / PMA5 |
| Broche 12 | RB4 — I/O pin / PMA4 |
| Broche 13 | RB3 — I/O pin / PMA3 |
| Broche 14 | RB2 — I/O pin / PMA2 |
| Broche 15 | RB0 — I/O pin / PGEC1 (programming clock) |
| Broche 16 | RB1 — I/O pin / PGED1 (programming data) |
| Broche 17 | VSS — Ground |
| Broche 18 | VDD — Power supply (+3.3V) |
| Broche 19 | RC15 — I/O pin / OSC1 |
| Broche 20 | RC13 — I/O pin / SOSC |
| Broche 21 | RC14 — I/O pin / OSC2 |
| Broche 22 | VSS — Ground |
| Broche 23 | RC1 — I/O pin / U1CTS |
| Broche 24 | RC2 — I/O pin / U1RTS |
| Broche 25 | RC3 — I/O pin / U1RX |
| Broche 26 | RC4 — I/O pin / U1TX |
| Broche 27 | VDD — Power supply (+3.3V) |
| Broche 28 | VSS — Ground |
| Broche 29 | D+ — USB D+ data line |
| Broche 30 | D- — USB D- data line |
| Broche 31 | VBUS — USB VBUS input sense |
| Broche 32 | VUSB3V3 — USB internal transceiver supply |
| Broche 33 | RD0 — I/O pin / PMD0 |
| Broche 34 | RD1 — I/O pin / PMD1 |
| Broche 35 | RD2 — I/O pin / PMD2 |
| Broche 36 | RD3 — I/O pin / PMD3 |
| Broche 37 | RD4 — I/O pin / PMD4 |
| Broche 38 | RD5 — I/O pin / PMD5 |
| Broche 39 | RD6 — I/O pin / PMD6 |
| Broche 40 | RD7 — I/O pin / PMD7 |
| Broche 41 | RD8 — I/O pin / PMD8 |
| Broche 42 | RD9 — I/O pin / PMD9 |
| Broche 43 | RD10 — I/O pin / PMD10 |
| Broche 44 | RD11 — I/O pin / PMD11 |
| Broche 45 | VSS — Ground |
| Broche 46 | VDD — Power supply (+3.3V) |
| Broche 47 | RD12 — I/O pin / PMD12 |
| Broche 48 | RD13 — I/O pin / PMD13 |
| Broche 49 | RD14 — I/O pin / PMD14 |
| Broche 50 | RD15 — I/O pin / PMD15 |
| Broche 51 | RC12 — I/O pin |
| Broche 52 | RC11 — I/O pin |
| Broche 53 | RC10 — I/O pin |
| Broche 54 | RC9 — I/O pin |
| Broche 55 | RC8 — I/O pin |
| Broche 56 | RC7 — I/O pin |
| Broche 57 | RC6 — I/O pin |
| Broche 58 | RC5 — I/O pin |
| Broche 59 | RA0 — I/O pin |
| Broche 60 | RA1 — I/O pin |
| Broche 61 | RA2 — I/O pin |
| Broche 62 | RA3 — I/O pin |
| Broche 63 | RA4 — I/O pin |
| Broche 64 | RA5 — I/O pin |
| Broche EP | EP — Exposed thermal pad (must be soldered to ground plane) |
Applications typiques
PIC32MX450F128HT-I/MR convient pour 6 applications: USB HID Peripherals (Keyboard / Mouse / Gamepad), Industrial Control and Sensor Hubs, Embedded Graphics HMI with PMP, Embedded Audio Playback (I2S), USB Charging and Power Bank Controllers, Connected IoT Edge Sensor Nodes.
USB HID Peripherals (Keyboard / Mouse / Gamepad)
The PIC32MX450F128HT-I/MR is well-suited to USB Human Interface Device designs thanks to its integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver and 49 user I/O pins. The 80 MHz MIPS32 M4K core has enough headroom to run the USB stack, HID report parser, and debounce logic in firmware without DMA. Designers wire the D+/D- lines as a 90-ohm differential pair with 27-ohm or 45-ohm series resistors and add a 4.7 uF bulk capacitor on VBUS, all within 3 mm of the device pins. The 128 KB Flash holds a full HID descriptor table and bootloader, leaving 32 KB SRAM for ring buffers during enumeration.
Recommandé
Industrial Control and Sensor Hubs
The 28 channels of 10-bit ADC at up to 1 Msps and 5 UART make the PIC32MX450F128HT-I/MR a strong fit for industrial sensor hubs and process-control edge nodes. The 4-channel DMA engine lets ADC scans stream to RAM without CPU intervention, freeing the 80 MHz M4K core to run Modbus or proprietary serial protocols. The industrial -40C to +85C temperature rating supports factory floor mounting, and 49 user I/O accommodate optocoupler-driven inputs and relay outputs. The 64-VQFN (9x9 mm) footprint keeps the design compact inside DIN-rail enclosures.
Recommandé
Embedded Graphics HMI with PMP
The PIC32MX450F128HT-I/MR drives low-cost color TFT displays through its Parallel Master Port (PMP) at up to 25 MHz pixel throughput. Combined with 32 KB SRAM and 128 KB Flash, the device can run Microchip's Microchip Graphics Library for menu rendering, slider widgets, and basic touch support via an external ADC channel. The 80 MHz core provides the headroom needed to manage screen refresh while handling keypad, encoder, and serial inputs concurrently.
Recommandé
Embedded Audio Playback (I2S)
The PIC32MX450F128HT-I/MR streams 16-bit/44.1 kHz PCM audio through its two SPI/I2S interfaces without codec glue logic. The 4-channel DMA engine keeps audio flowing while the M4K core handles file system reads from SPI Flash, leaving enough bandwidth for additional UI or telemetry tasks. With 32 KB SRAM, designers can buffer approximately 180 ms of stereo audio at 44.1 kHz before consuming system RAM.
Recommandé
USB Charging and Power Bank Controllers
The integrated USB-OTG Full-Speed controller with VBUS sensing and 5V-tolerant inputs makes the PIC32MX450F128HT-I/MR a controller candidate for USB charging hubs and small power-bank controllers. The device negotiates with BC 1.2 / CDP/DCP detectors and provides I/O for current-sense amplifiers and MOSFET gate drivers. With 49 I/O pins, designers can drive status indication LEDs, push buttons, and the host-attach logic on a single chip.
Recommandé
Connected IoT Edge Sensor Nodes
The PIC32MX450F128HT-I/MR serves as a USB-tethered edge sensor node for IoT, with two SPI/I2S interfaces to connect MEMS microphones, accelerometers, or environmental sensors. The 2 I2C controllers drive additional peripherals, while the 5 UART provide concurrent debug and downlink connectivity. The 80 MHz M4K core can run JSON serialization and TLS primitives using libraries like WolfSSL; the 128 KB Flash accommodates full TLS stacks alongside application code.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC32MX450F128HT-I/MR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC32MX450F128H-I/MR | PIC32MX350F256HT-I/MR | PIC32MX370F512HT-V/MR | PIC32MX270F512HT-50I/MR | PIC32MX250F256HT-I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9) | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same |
| Core Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz (-37.5%) | 50 MHz (-37.5%) |
| Flash | 128 KB | 128 KB | 256 KB (+100%) | 512 KB (+300%) | 512 KB (+300%) | 256 KB (+100%) |
| SRAM | 32 KB | 32 KB | 32 KB | 128 KB | 128 KB | 32 KB |
| USB OTG | Yes (Full-Speed) | Yes | Yes | Yes | Yes | No |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Automotive -40C to +105C | Industrial -40C to +85C | Industrial -40C to +85C |
| ADC Channels | 28 channels, 10-bit | 28 channels | 28 channels | 28 channels | 28 channels | 28 channels |
Principaux différenciateurs
- Larger Flash than the 64 KB / 100 KB entry parts (vs PIC32MX270F512HT-50I/MR)
- USB-OTG controller integrated vs no USB (vs PIC32MX250F256HT-I/MR)
- Lower cost / smaller Flash than PIC32MX370F512HT-V/MR (vs PIC32MX370F512HT-V/MR)
Notes de conception
Route the USB D+ and D- lines as a 90-ohm differential pair with controlled impedance, and place a 45-ohm series resistor on each line within 3 mm of the device pins. Connect VUSB3V3 to +3.3 V through a ferrite bead, with a 4.7 uF decoupling capacitor within 3 mm of the pin. According to the Microchip PIC32MX3XX/4XX family datasheet, this layout pattern is required for USB-IF compliance and EMI margins.
The PIC32MX450F128HT-I/MR requires a 2.3 V to 3.6 V supply on all VDD pins with bulk and decoupling capacitors placed as close to each VDD/VSS pair as possible. The analog supply AVDD should be tied to VDD but separated by a ferrite bead; AVDD should be routed with 1 uF + 0.1 uF local decoupling. The 80 MHz operation with USB enabled draws approximately 75 mA in active mode with peripheral set enabled.
The 64-VQFN (9x9 mm) package provides a thermal resistance theta_JA around 22 C/W with a properly-soldered exposed pad (EP) acting as the primary heat-spreader. The exposed pad MUST be soldered to a continuous copper ground plane with thermal vias for reliable operation. Without a properly soldered EP, junction temperature can rise by 20-30 C and may trigger thermal shutdown under heavy peripheral load.
The PIC32MX450F128HT-I/MR requires a stable clock source for USB operation. When using the internal 8 MHz Fast RC oscillator, the PLL must be configured to derive a 48 MHz USB clock; alternatively, a 24 MHz crystal can be used with the PLL set for 96 MHz SYSCLK and 48 MHz USB. According to the family datasheet, USB Full-Speed requires 0.25% clock accuracy, so non-crystal modes need calibration against a known reference.
Do not operate the device below 2.3 V or above 3.6 V as the Flash and PLL blocks will misbehave. The /MCLR reset pin requires a 10 kohm pull-up to VDD; an external voltage supervisor is recommended for applications where brownout detection is critical. Do not leave unused I/O pins floating - configure them as outputs low or inputs with internal pull-downs to avoid parasitic current draws.
Informations de conformité
Industrial -40C to +85C grade, not AEC-Q100 qualified. For automotive applications choose PIC32MX370F512HT-V/MR.
