PIC32MX440F256HT-80V/MR - 32-bit MCU 256KB Flash USB-OTG | Microchip
MPN: PIC32MX440F256HT-80V/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.98 | $2.98 |
| 10 | $2.86 | $28.60 |
| 100 | $2.71 | $271.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.4 | $2,400.00 |
PIC32MX440F256HT-80V/MR Overview
A 32-bit microcontroller is an integrated circuit combining a 32-bit CPU core, program memory (Flash), data memory (RAM), and configurable peripheral set on a single die. Within the PIC32MX family, this part belongs to the USB-equipped MX4xx sub-family, which adds a dedicated USB 2.0 OTG controller and 10-bit ADC compared to the lower-end MX1xx/MX2xx lines. Within the broader taxonomy, it sits as MCU -> embedded controller -> 32-bit microcontroller -> semiconductor, serving as the central processor for real-time embedded systems.
Key differentiating features include hardware DMA, RTCC with calendar mode, PMP (parallel Master Port) for graphics/FPGA bridging, and the CIP (Core Independent Peripherals) such as a 16-bit Parallel Master Port and configurable logic cells. The 64-VQFN package exposes up to 53 GPIO pins, supporting mixed 5V/3.3V tolerant I/O for designs that must interface to legacy 5V peripherals.
The part uses the MIPS32 M4K microAptiv core, with single-cycle hardware multiply/divide, debug via 2-wire MIPS JTAG or 4-wire standard JTAG, and trace support through the optional Trace Port. The 80 MHz frequency and dual-bus Flash prefetch provide deterministic throughput for protocol stacks such as USB, TCP/IP via soft-MAC, or Modbus.
Typical applications include USB HID devices, industrial sensor hubs, motor control FOC loops, USB barcode scanners, and embedded web servers. The wide peripheral set and DMA engine reduce CPU load for high-throughput I/O. For designers, the -80V temperature grade targets industrial 2.5V-3.6V designs; pair with the MPLAB Harmony framework for rapid firmware development. This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX440F256HT-80V/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 PIC32MX440F256HT-80V/MR (same form factor and footprint) — differing in Package, Timers, ADC, Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX440F256H-80V/MR
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →PIC32MX440F256HT-80I/MR
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →PIC32MX440F256HT-80V/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC32MX340F512HT-80V/MR
✅ Drop-In✓ In Stock
$4.31 / Unit
View Datasheet →PIC32MX360F256L-80V/PT
✅ Drop-In✓ In Stock
$5.78 / Unit
View Datasheet →PIC32MX350F256HT-V/MR
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →PIC32MX440F256HT-80V/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (microAptiv) |
| Data Bus Width | 32-bit |
| Maximum Clock Frequency | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (RAM) | 32 KB |
| USB Interface | USB 2.0 Full-Speed OTG |
| ADC | 10-bit |
| DMA Channels | Yes (hardware DMA) |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Supply Voltage (typical) | 3.3 V |
| Operating Temperature Range | -40 C to +105 C (V grade) |
| Package | 64-VQFN (9x9 mm, MR) |
| Mounting Type | Surface Mount |
| I/O Pins (approx.) | 53 |
| RoHS Status | Compliant |
PIC32MX440F256HT-80V/MR 64-vqfn (9x9 mm, mr) Pin Configuration Guide
Pin configuration for PIC32MX440F256HT-80V/MR (64-vqfn (9x9 mm, mr) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC32MX440F256HT-80V/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX440F256HT-80V/MR is suitable for 7 applications: USB Human Interface Device (HID), Industrial Sensor Hub, Brushless DC Motor Control (FOC), USB Barcode Scanner / POS Terminal, Embedded Web Server / IoT Gateway, Data Logging with USB Mass Storage, Medical Point-of-Care Device.
USB Human Interface Device (HID)
The PIC32MX440F256HT-80V/MR is purpose-built for USB 2.0 Full-Speed HID peripherals such as keyboards, mice, game controllers, and custom joysticks. Its integrated OTG controller eliminates the need for an external PHY, and the hardware DMA engine offloads USB endpoint transfers from the CPU. The 80 MHz MIPS M4K core comfortably handles HID report parsing and descriptor management, while 256 KB Flash supports complex composite HID stacks. Pair the device with the Microchip USB Framework stack inside MPLAB Harmony v3 to minimize firmware development time. The 64-VQFN package footprint suits compact consumer enclosures, and the 3.3 V operation aligns with USB voltage rails directly.
Recommended
Industrial Sensor Hub
Industrial sensor aggregation gateways benefit from the PIC32MX440F256HT-80V/MR's combination of 53 GPIO, multiple UART/SPI/I2C peripherals, hardware DMA, and 32 KB SRAM. The 10-bit ADC can digitize analog sensor channels, while the parallel Master Port (PMP) interfaces to external LCD or FPGA bridges. DMA-driven serial reception frees the 80 MHz core to run Modbus, CAN, or proprietary field-bus stacks concurrently. The -80V temperature grade (-40 C to +105 C) tolerates sealed enclosure thermal rise. Using Microchip's MPLAB Code Configurator (MCC) with Harmony drivers, engineers rapidly initialize multiple serial channels and DMA triggers without hand-written register code.
Recommended
Brushless DC Motor Control (FOC)
Sensorless field-oriented control (FOC) loops for brushless DC motors require deterministic PWM update rates, fast ADC sampling, and minimal interrupt jitter. The PIC32MX440F256HT-80V/MR delivers 80 MHz MIPS M4K throughput and 10-bit ADC with dedicated DMA, enabling closed-loop FOC computation within typical 20-50 us cycle budgets. Its MCPWM/OC/PWM peripheral set supports complementary PWM with dead-band generation required for 3-phase inverter drives. The 64-VQFN footprint permits integration onto compact motor-driver PCBs alongside gate drivers. The -80V temperature grade tolerates in-motor mounting where ambient temperatures climb above 85 C. Microchip AN1078 reference firmware demonstrates drop-in FOC algorithms for this MCU.
Recommended
USB Barcode Scanner / POS Terminal
Retail barcode scanners and POS peripherals benefit from the PIC32MX440F256HT-80V/MR's integrated USB OTG controller and substantial 256 KB Flash for image-decoding firmware. The MIPS M4K core at 80 MHz decodes 1D/2D symbologies quickly, while DMA-driven image capture from external camera sensors offloads memory transfers. USB HID Keyboard emulation is implemented in firmware via the integrated stack, enabling plug-and-play POS deployment. Microchip's USB bootloader allows field firmware updates through the same USB port. The compact 9x9 mm VQFN package suits slimline scanner housings where board area is constrained.
Recommended
Embedded Web Server / IoT Gateway
Lightweight embedded web servers and IoT edge gateways use the PIC32MX440F256HT-80V/MR's 80 MHz performance and 256 KB Flash to run TCP/IP stacks (e.g., Microchip's TCP/IP Lite or lwIP via MPLAB Harmony). The 32 KB SRAM supports multi-socket buffering, while the USB OTG controller can host Wi-Fi or Ethernet dongles for connectivity. The PMP peripheral interfaces external parallel memory for larger web assets. With RTCC providing timestamped logging and watchdog timers for reliability, the part suits always-on edge nodes. The 64-VQFN 9x9 mm package integrates into DIN-rail or wall-mount enclosures.
Recommended
Data Logging with USB Mass Storage
Portable data loggers that record to USB flash drives rely on the PIC32MX440F256HT-80V/MR's USB OTG Host mode and ample Flash for FAT32 stack firmware. The 80 MHz core manages file system operations while DMA streams ADC samples to the USB endpoint in real time. The 53 GPIO allow multi-channel sensor input multiplexing, and the RTCC provides accurate timestamps for logged events. The compact 64-VQFN package fits handheld logger enclosures. Microchip USB Host bootloader support simplifies field updates via thumb drive.
Recommended
Medical Point-of-Care Device
Point-of-care diagnostic instruments benefit from the PIC32MX440F256HT-80V/MR's deterministic 80 MHz performance, integrated USB for data upload to LIS systems, and 256 KB Flash for measurement algorithm firmware. The 10-bit ADC digitizes analog sensor outputs (e.g., photometric, electrochemical), and hardware DMA ensures sample streaming without CPU intervention. The -80V temperature grade handles thermal rise in sealed instruments. The 64-VQFN package allows miniature PCB designs required for handheld diagnostics. Engineers should validate IEC 60601 compliance for actual medical deployment.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX440F256HT-80V/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX440F256H-80V/MR | PIC32MX440F256HT-80I/MR | PIC32MX340F512HT-80V/MR | PIC32MX350F256HT-V/MR | PIC32MX440F256HT-80V/PT |
|---|---|---|---|---|---|---|
| Package | 64-VQFN 9x9 mm (MR) | 64-VQFN 9x9 mm (MR) - same | 64-VQFN 9x9 mm (MR) - same | 64-VQFN 9x9 mm (MR) - same | 64-VQFN (MR) - same | 64-TQFP (PT) - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB | 256 KB | 256 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Maximum Clock Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz | 80 MHz |
| USB 2.0 OTG | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | -40 C to +105 C (V) | -40 C to +105 C (V) | -40 C to +85 C (I) | -40 C to +105 C (V) | -40 C to +105 C (V) | -40 C to +105 C (V) |
| Core Architecture | MIPS M4K (MX4) | MIPS M4K (MX4) | MIPS M4K (MX4) | MIPS M4K (MX3/4) | MIPS M4K (MX5) | MIPS M4K (MX4) |
| Hardware DMA | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Industrial V temperature grade up to +105 C (vs PIC32MX440F256HT-80I/MR)
- Higher Flash density than MX3 family parts (vs PIC32MX340F256HT-80I/MR)
- 80 MHz MX4 vs lower-power MX5 variant (vs PIC32MX350F256HT-V/MR)
Design Notes
The PIC32MX440F256HT-80V/MR operates at 2.3 V to 3.6 V with a typical 3.3 V rail. Estimated: at 80 MHz with all peripherals active, core current draw reaches ~70 mA plus I/O drive. Decouple VDD with a 10 uF bulk capacitor plus 0.1 uF ceramic placed within 5 mm of each VDD pin. For USB applications, ensure VUSB pin has its own 0.1 uF + 4.7 uF capacitor network per the Microchip PIC32MX USB hardware design checklist. An LDO such as MCP1700 supplies a clean 3.3 V rail from a higher-voltage source.
The 64-VQFN package has an exposed thermal pad (EP) that MUST be soldered to a ground pour for proper heat dissipation. Estimated: theta_JA for the 9x9 mm VQFN is approximately 28 C/W. At full 80 MHz operation with peripheral-heavy code, power dissipation can reach 250 mW, yielding a junction temperature rise of ~7 C above ambient. For continuous high-throughput designs, allocate at least 1 square centimeter of 1-oz copper pour tied to the exposed pad.
Route the 80 MHz crystal traces (OSC1/OSC2) as short as possible (under 5 mm) and guard them with a ground ring to prevent EMI coupling. Keep USB D+/D- traces as a 90-ohm differential pair with length matching under 2 mm tolerance per USB 2.0 specification. Place the VBUS sense resistor within 5 mm of the USB connector. The MPLAB Harmony USB stack examples provide reference layouts for 4-layer stack-ups.
A common design pitfall is omitting the 4.7 uF decoupling capacitor on the VUSB pin when using USB OTG, which causes erratic USB enumeration. Another is failing to configure the JTAG/SWD TRACE pins correctly - on the 64-VQFN, these alternate with GPIO and must be reassigned via the CFGCON register if not used. Always set the correct FPLL configuration before switching to the 80 MHz mode to avoid core lockup.
Compliance Information
RoHS compliance per Microchip product page. AEC-Q100 not applicable for general industrial MCU. Not qualified for automotive applications.
