PIC32MX450F256HT-120/MR - 120MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX450F256HT-120/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.61 | $46.10 |
| 100 | $4.08 | $408.00 |
| 500 | $3.67 | $1,835.00 |
| 1,000 | $3.27 | $3,270.00 |
PIC32MX450F256HT-120/MR Overview
A 32-bit microcontroller (MCU) is an integrated circuit that combines a 32-bit CPU core, program memory, data memory, and a configurable set of peripherals in a single package. The PIC32MX family uses the MIPS32 M4K core, which sits in the broader hierarchy of microcontrollers -> embedded processors -> microcontrollers -> semiconductors. Compared with 8-bit or 16-bit MCUs, 32-bit devices like the PIC32MX450 provide higher performance, larger addressable memory, and richer peripheral integration for connected and graphics-rich applications.
Key features of the PIC32MX450F256HT-120/MR include 256 KB self-programmable Flash, 64 KB SRAM, 49 programmable I/O pins with peripheral pin select (PPS), a 16-bit timer/counter module, a 32-bit Real-Time Clock/Calendar, and a 10-bit ADC. The device operates from 2.3 V to 3.6 V and supports an industrial temperature range. The 64-QFN package with exposed pad provides 31 C/W thermal resistance and excellent electrical grounding for noise-sensitive analog designs.
Typical applications include USB peripherals and HID devices, consumer audio with I2S, industrial control and HMI panels, low-cost graphics LCD controllers, motor control, and connected sensor nodes. The integrated USB 2.0 full-speed OTG controller and 1 Msps ADC simplify BOM while the PIC32 ecosystem (MPLAB X IDE, Harmony framework) accelerates time-to-market.
When designing with this device, ensure that the exposed pad is soldered to a sufficiently large copper pour (typically 1 sq inch minimum) for thermal dissipation. Configure PPS before toggling peripheral I/O, and adhere to the 2.3 V minimum VDD for full-spec operation; below this the brown-out reset may engage.
Drop-in alternatives for PIC32MX450F256HT-120/MR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX450F256HT-120/MR (same form factor and footprint) — differing in Package, ADC, Timers, MSL Level, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256H-120/MR
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →PIC32MX450F256HT-120V/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256HT-I/MR
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC32MX450F256HT-120I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX440F256HT-80I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.61 / Unit
View Datasheet →PIC32MX450F256HT-120/MR Maximum Ratings & Electrical Characteristics
| Core Processor | MIPS32 M4K |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 120 MHz |
| Performance | 150 DMIPS |
| Program Memory Size | 256 KB (256K x 8) Flash |
| RAM Size | 64 KB |
| Number of I/O Pins | 49 |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature Range | -40C to +105C (industrial) |
| ADC | 10-bit, 1 Msps, up to 28 channels |
| Analog Comparators | 2 |
| UART Modules | 5 |
| SPI / I2S Modules | 2 |
| I2C Modules | 2 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Package | 64-QFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX450F256HT-120/MR Pin Configuration
| Pin 1 | RP15/PWM1L/PMD5/RB15 — Remappable I/O, PWM output, Parallel Master Port |
| Pin 2 | RP14/PMA1/PWM2L/PMCS1/PMRD/RB14 — Remappable I/O, PMP, PWM output |
| Pin 3 | VSS — Ground reference |
| Pin 4 | RP13/PMA0/PMCS2/RB13 — Remappable I/O, PMP chip select |
| Pin 5 | RP12/PWM2H/RB12 — Remappable I/O, PWM output |
| Pin 6 | RP11/PMD4/RB11 — Remappable I/O, PMP data |
| Pin 7 | RP10/PMD3/RB10 — Remappable I/O, PMP data |
| Pin 8 | RP9/PMD2/RB9 — Remappable I/O, PMP data |
| Pin 9 | RP8/PMD1/RB8 — Remappable I/O, PMP data |
| Pin 10 | RP7/PMD0/RB7 — Remappable I/O, PMP data |
| Pin 11 | RP6/OC3/RB6 — Remappable I/O, Output Compare |
| Pin 12 | RP5/OC2/RB5 — Remappable I/O, Output Compare |
| Pin 13 | RP4/OC1/RB4 — Remappable I/O, Output Compare |
| Pin 14 | RP3/SDA2/RB3 — Remappable I/O, I2C2 data |
| Pin 15 | RP2/SCL2/RB2 — Remappable I/O, I2C2 clock |
| Pin 16 | TDO/AN11/RPB11 — JTAG TDO, ADC input 11 |
| Pin 17 | TCK/AN10/RPB10 — JTAG TCK, ADC input 10 |
| Pin 18 | TMS/AN9/RPB9 — JTAG TMS, ADC input 9 |
| Pin 19 | TDI/AN8/RPB8 — JTAG TDI, ADC input 8 |
| Pin 20 | AN7/RPB7 — ADC input 7 |
| Pin 21 | AN6/RPB6 — ADC input 6 |
| Pin 22 | AN5/RPB5 — ADC input 5 |
| Pin 23 | AN4/RPB4 — ADC input 4 |
| Pin 24 | AN3/RPB3 — ADC input 3 |
| Pin 25 | AN2/RPB2 — ADC input 2 |
| Pin 26 | AN1/RPB1 — ADC input 1 |
| Pin 27 | AN0/RPB0 — ADC input 0 |
| Pin 28 | VREF-/CVREF- — ADC negative reference |
| Pin 29 | VREF+/CVREF+ — ADC positive reference |
| Pin 30 | AVSS — Analog ground |
| Pin 31 | AVDD — Analog supply |
| Pin 32 | OA1IN-/CVREF/AN12 — Op-amp input, ADC channel 12 |
| Pin 33 | OA1OUT/AN1 — Op-amp output |
| Pin 34 | OA1IN+/AN0 — Op-amp positive input |
| Pin 35 | OSC1/CLKI/RC12 — Crystal oscillator input |
| Pin 36 | OSC2/CLKO/RC15 — Crystal oscillator output |
| Pin 37 | RC13/SOSCO — Secondary oscillator output |
| Pin 38 | RC14/SOSCI — Secondary oscillator input |
| Pin 39 | VDD — Digital supply |
| Pin 40 | ENVREG/VDD — Voltage regulator enable |
| Pin 41 | VSS — Ground reference |
| Pin 42 | RTCC/RA8 — Real-time clock alarm output |
| Pin 43 | RA9 — General I/O |
| Pin 44 | RA10 — General I/O |
| Pin 45 | RA0/ULPM/INT0 — Wake from sleep, external interrupt |
| Pin 46 | RA1/INT1 — External interrupt 1 |
| Pin 47 | D+/RA2 — USB data plus |
| Pin 48 | D-/RA3 — USB data minus |
| Pin 49 | VBUS — USB VBUS detect |
| Pin 50 | VUSB — USB internal transceiver supply |
| Pin 51 | RA4 — General I/O |
| Pin 52 | RA5 — General I/O |
| Pin 53 | RA6 — General I/O |
| Pin 54 | RA7 — General I/O |
| Pin 55 | RF0 — General I/O port F |
| Pin 56 | RF1 — General I/O port F |
| Pin 57 | RF2 — General I/O port F |
| Pin 58 | RF3 — General I/O port F |
| Pin 59 | RF4/PMD11 — Remappable I/O, PMP data |
| Pin 60 | RF5/PMD10 — Remappable I/O, PMP data |
| Pin 61 | RF6/PMD9 — Remappable I/O, PMP data |
| Pin 62 | RF7/PMD8 — Remappable I/O, PMP data |
| Pin 63 | RF8/PMD7 — Remappable I/O, PMP data |
| Pin 64 | RF9/PMD6 — Remappable I/O, PMP data |
| Pin EP | EP (Exposed Pad) — Thermal pad - must be soldered to ground pour for thermal dissipation |
Typical Applications
PIC32MX450F256HT-120/MR is suitable for 6 applications: USB HID and Peripherals, Consumer Audio with I2S, Industrial Control and HMI, Low-Cost Graphics LCD Controller, Connected Sensor Nodes, Motor Control and BLDC Drivers.
USB HID and Peripherals
The PIC32MX450F256HT-120/MR is well-matched for USB Human Interface Devices (HID), CDC serial bridges, and custom USB peripherals. The integrated USB 2.0 Full-Speed OTG controller eliminates the need for an external PHY chip, simplifying BOM and freeing board space. At 120 MHz, the M4K core delivers ample headroom to run USB stacks plus HID report processing at 1 kHz polling rates. The 256 KB Flash comfortably fits Microchip's USB stack (~30 KB), HID class drivers, and application code. Designers should add a 27 ohm series resistor on D+/D- and route the USB differential pair with 90 ohm differential impedance. The device's 49 I/O pins leave enough headroom for buttons, LEDs, and auxiliary SPI/I2C peripherals alongside the USB endpoints.
Recommended
Consumer Audio with I2S
For low-cost audio DACs, USB speakers, and Bluetooth audio bridges, the PIC32MX450F256HT-120/MR provides two I2S ports that interface directly to modern audio codecs. The 120 MHz CPU and 64 KB SRAM allow 48 kHz / 24-bit stereo I2S streams with ~5% CPU utilization when paired with DMA. Integrated 10-bit ADC and I2C simplify digital volume control via codec programming. The 256 KB Flash accommodates USB audio class firmware plus the I2S driver stack. Compared with Cortex-M0 alternatives, the PIC32MX450 offers stronger DMA support and a richer interrupt controller that reduces latency jitter for low-noise audio. Designers should route MCLK to the codec and place the QFN exposed pad over a continuous ground pour to minimize ADC noise coupling.
Recommended
Industrial Control and HMI
In industrial control panels and Human-Machine Interface (HMI) applications, the PIC32MX450F256HT-120/MR integrates peripherals typically scattered across multiple MCUs. The 10-bit 1 Msps ADC with up to 28 channels handles multiple sensor inputs simultaneously, while five UART modules support RS-232/RS-485 multi-drop industrial networks. The 49 I/O pins are sufficient for matrix keypads, character LCDs, and small TFT panels up to 320x240. The wide 2.3-3.6 V supply range tolerates industrial 24V rails stepped down through common DC-DC converters. The industrial -40 to +105C temperature rating suits factory floor installations. Pair with an external RS-485 transceiver and opto-isolated digital inputs for robust industrial node designs.
Recommended
Low-Cost Graphics LCD Controller
The PIC32MX450F256HT-120/MR drives small QVGA (320x240) and WQVGA (480x272) TFT panels through its Parallel Master Port (PMP) operating up to 25 MHz. At 120 MHz the M4K core can refresh 320x240 panels at 60 Hz with simple bitmap graphics, 8x8 fonts, and basic UI widgets using ~30% CPU budget. The 256 KB Flash stores framebuffer fonts, bitmap assets, and the graphics library; the 64 KB SRAM holds partial framebuffers for double-buffering. SPI/I2S ports connect to resistive touch controllers while the 10-bit ADC reads backlight brightness via a photodiode amplifier. This combination enables under-$5 BOM for color TFT HMI nodes competing with discrete display controllers.
Recommended
Connected Sensor Nodes
For IoT sensor aggregation nodes and edge gateways, the PIC32MX450F256HT-120/MR offers sufficient compute to run Microchip's MPLAB Harmony TCP/IP Lite stack alongside sensor drivers. The five UART modules aggregate multiple Modbus or LIN sensor buses, while I2C/SPI connect to digital sensors. USB OTG allows local diagnostics via a tethered host. The 256 KB Flash accommodates encrypted firmware storage with the crypto library; 64 KB SRAM holds packet buffers and TLS contexts. The 2.3-3.6 V supply aligns with battery monitoring ICs and 3.3 V LDO regulators. Active current draw at 120 MHz is approximately 50 mA, making it suitable for line-powered or large-battery sensor hubs.
Recommended
Motor Control and BLDC Drivers
The PIC32MX450F256HT-120/MR is well suited for sensorless BLDC motor control up to several hundred watts. The 10-bit 1 Msps ADC samples back-EMF zero-crossing points while the Output Compare modules generate complementary PWM with dead-time insertion. At 120 MHz, the core runs 25 kHz PWM loops with field-oriented control (FOC) algorithms in software, leaving enough headroom for CAN communication or USB diagnostics. Five UART modules support CAN bridges via external transceivers. The 49 I/O pins accept multiple Hall-sensor inputs, fault flags, and encoder feedback. Designers should follow Microchip AN1078 sensorless BLDC guidelines for hardware current sensing and protection circuitry.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX450F256HT-120/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256H-120/MR | PIC32MX450F256HT-120V/MR | PIC32MX450F256HT-I/MR | PIC32MX450F256HT-120I/MR | PIC32MX440F256HT-80I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Maximum Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 80 MHz | 120 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| RAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +125C (AEC-Q100 Grade 2) | -40C to +85C | -40C to +85C | -40C to +85C |
| Automotive Grade | No (industrial) | No | Yes - AEC-Q100 Grade 2 | No | No | No |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
| USB Support | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
Key Differentiators
- Industrial -40 to +105C temperature range with 120 MHz speed (vs PIC32MX450F256HT-I/MR)
- Automotive-grade option available in same footprint (vs PIC32MX450F256HT-120V/MR)
- Same die across all speed grades (vs PIC32MX440F256HT-80I/MR)
Design Notes
The 64-QFN package exposes a thermal pad (EP) at its center that must be soldered to a continuous ground pour of at least 1 square inch. The datasheet theta_JA of approximately 31 C/W applies only when the EP is soldered properly. Estimated: with VDD = 3.3V, 120 MHz active CPU, and 50 mA core current, power dissipation is ~0.165 W and junction rise is ~5C above ambient. Without proper EP soldering, thermal resistance can rise above 80 C/W, causing severe derating in enclosed industrial enclosures.
Place decoupling capacitors as close as possible to VDD pins (1, 39, 40) and AVDD (pin 31). Use 0.1 uF ceramic plus 10 uF bulk on each supply rail. For USB applications, route D+/D- (pins 47, 48) as a 90 ohm differential pair with matched length and keep traces short (< 50 mm). Place VBUS (pin 49) voltage divider resistors within 5 mm of the pin to minimize ESD coupling into adjacent lines.
Do not exceed the absolute maximum VDD of 4.0 V; the part operates from 2.3-3.6 V but transients above 4.0 V can permanently damage the internal voltage regulator. The USB VBUS pin (49) is 5 V tolerant but requires external ESD protection. Configuration bits must be set before code execution - blank parts boot with the debug LED disabled and JTAG enabled by default. PPS (Peripheral Pin Select) registers must be unlocked before reassignment and locked afterward to prevent runaway writes.
Compliance Information
RoHS and REACH compliant per Microchip product declarations. The standard -120/MR variant is not AEC-Q100 qualified; use the -120V/MR suffix for automotive. Halogen-free status not explicitly stated in available datasheets.
