PIC32MX440F256H-80I/MR - 80MHz 32-bit MCU 256KB Flash USB-OTG | Microchip
MPN: PIC32MX440F256H-80I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.38 | $73.80 |
| 100 | $6.65 | $665.00 |
| 500 | $5.92 | $2,960.00 |
| 1,000 | $5.35 | $5,350.00 |
PIC32MX440F256H-80I/MR Overview
A 32-bit microcontroller (MCU) is an integrated computing system that combines a high-performance processor core with on-chip memory and a rich set of peripherals such as timers, ADCs, communication controllers, and GPIOs. The PIC32MX family is built on the MIPS32 M4K Harvard architecture with a 5-stage pipeline, hardware multiply/divide, and MIPS16e compressed instruction mode, allowing up to 40% smaller code size. The MX4xx sub-family specifically adds an integrated USB 2.0 OTG peripheral with dedicated DMA channels and PHY, distinguishing it from the MX3xx line.
Key features include 256 KB single-cycle Flash program memory, 32 KB SRAM data memory, a 10-bit 1 Msps Analog-to-Digital Converter with up to 16 channels, two I2C, two UART, and two SPI/I2S peripherals, five 16-bit timers/counters, an RTCC, and a parallel master port. The device operates from 2.3V to 3.6V across an industrial -40C to +85C temperature range. The 80 MHz CPU delivers up to 105 DMIPS throughput, with single-cycle multiply/divide enabling efficient DSP-class arithmetic.
The integrated USB OTG controller with on-chip PHY and dedicated DMA channel eliminates external PHY components, reducing BOM cost and PCB area in USB device, host, or dual-role applications. The Harvard architecture with separate instruction and data buses, combined with a 5-stage pipeline, allows instruction fetch and data load/store to occur in the same clock cycle, delivering sustained performance close to the rated 1.65 DMIPS/MHz/MHz on compute-intensive DSP routines.
Typical applications include USB peripherals such as HID/Bulk/CDC devices and USB host controllers, industrial control and Human-Machine Interface (HMI) panels, sensor hubs and data loggers, building automation controllers, and portable consumer electronics. The combination of large Flash, USB OTG, and high-performance 32-bit core is particularly suited for USB-connected embedded products that need significant local compute capability.
When designing with this part, allocate at least one 10 uF bulk plus 0.1 uF decoupling capacitor per VDD pin pair, route the USB D+/D- lines as a 90 ohm differential pair with length matching, and follow the recommended crystal/PLL layout from the Microchip PIC32MX3XX/4XX Family Data Sheet to avoid EMI and jitter issues.
This page synthesizes distributor pricing, verified drop-in alternatives drawn from the PIC32MX4XX family, and practical design notes not found on the manufacturer product page, giving procurement and engineering teams an actionable view in one place.
Drop-in alternatives for PIC32MX440F256H-80I/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 PIC32MX440F256H-80I/MR (same form factor and footprint) — differing in Package, ADC, Timers, Operating Temperature, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX450F256H-80I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F256H-80I/MR
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC32MX440F128H-80I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX430F256H-80I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX470F256H-80I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX440F256HT-80I/MR
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →PIC32MX440F256H-80I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K (Harvard, 5-stage pipeline) |
| CPU Speed | 80 MHz (105 DMIPS) |
| Instruction Set | MIPS32 with MIPS16e compression |
| Program Flash | 256 KB |
| SRAM | 32 KB |
| USB Peripheral | USB 2.0 OTG with integrated PHY and dedicated DMA |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| I/O Pins | 53 |
| ADC | 10-bit, up to 16 channels, 1 Msps |
| Timers | 5 x 16-bit, plus RTCC |
| UART | 2 |
| SPI / I2S | 2 |
| I2C | 2 |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 64-pin QFN (MR), 9x9 mm with exposed pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| Lead-Free / Halogen-Free | Lead-free per datasheet packaging marking |
PIC32MX440F256H-80I/MR Pin Configuration
| Pin 1 | RP15/RF5 — Remappable peripheral / RF5 |
| Pin 2 | RP9/SDA2 — Remappable peripheral / I2C2 SDA |
| Pin 3 | RP10/SCL2 — Remappable peripheral / I2C2 SCL |
| Pin 4 | OSC1/CLKI/RC12 — Crystal oscillator input or external clock |
| Pin 5 | OSC2/CLKO/RC15 — Crystal oscillator output or clock out |
| Pin 6 | VCAP — Internal voltage regulator output, requires 10uF cap to Vss |
| Pin 7 | PGED2/RP8 — Programming data / remappable peripheral |
| Pin 8 | PGEC2/RP7 — Programming clock / remappable peripheral |
| Pin 9 | RP16/RF0 — Remappable peripheral / RF0 |
| Pin 10 | RP17/RF1 — Remappable peripheral / RF1 |
| Pin 11 | VUSB — USB Internal Transceiver Supply, 3.3V |
| Pin 12 | D+ — USB D+ line |
| Pin 13 | D- — USB D- line |
| Pin 14 | VSS — Ground |
| Pin 15 | VDD — Positive supply 2.3V to 3.6V |
| Pin 16 | RD8 — I/O port D bit 8 |
| Pin 17 | RD9 — I/O port D bit 9 |
| Pin 18 | RD10 — I/O port D bit 10 |
| Pin 19 | RD11 — I/O port D bit 11 |
| Pin 20 | RD0 — I/O port D bit 0 |
| Pin 21 | RD1 — I/O port D bit 1 |
| Pin 22 | RD2 — I/O port D bit 2 |
| Pin 23 | RD3 — I/O port D bit 3 |
| Pin 24 | RD4 — I/O port D bit 4 |
| Pin 25 | RD5 — I/O port D bit 5 |
| Pin 26 | RD6 — I/O port D bit 6 |
| Pin 27 | RD7 — I/O port D bit 7 |
| Pin 28 | VSS — Ground |
| Pin 29 | VDD — Positive supply 2.3V to 3.6V |
| Pin 30 | RB5/AN5 — I/O port B bit 5 / ADC input |
| Pin 31 | RB4/AN4 — I/O port B bit 4 / ADC input |
| Pin 32 | RB3/AN3 — I/O port B bit 3 / ADC input |
| Pin 33 | RB2/AN2 — I/O port B bit 2 / ADC input |
| Pin 34 | RB1/AN1 — I/O port B bit 1 / ADC input |
| Pin 35 | RB0/AN0 — I/O port B bit 0 / ADC input |
| Pin 36 | RB6/PGEC1 — I/O port B bit 6 / Programming clock 1 |
| Pin 37 | RB7/PGED1 — I/O port B bit 7 / Programming data 1 |
| Pin 38 | VSS — Ground |
| Pin 39 | VDD — Positive supply 2.3V to 3.6V |
| Pin 40 | RA0 — I/O port A bit 0 |
| Pin 41 | RA1 — I/O port A bit 1 |
| Pin 42 | RA2 — I/O port A bit 2 |
| Pin 43 | RA3 — I/O port A bit 3 |
| Pin 44 | RA4 — I/O port A bit 4 |
| Pin 45 | RA5 — I/O port A bit 5 |
| Pin 46 | RA6 — I/O port A bit 6 |
| Pin 47 | RA7 — I/O port A bit 7 |
| Pin 48 | RB8 — I/O port B bit 8 |
| Pin 49 | RB9 — I/O port B bit 9 |
| Pin 50 | RB10 — I/O port B bit 10 |
| Pin 51 | RB11 — I/O port B bit 11 |
| Pin 52 | RB12 — I/O port B bit 12 |
| Pin 53 | RB13 — I/O port B bit 13 |
| Pin 54 | RB14 — I/O port B bit 14 |
| Pin 55 | RB15 — I/O port B bit 15 |
| Pin 56 | VSS — Ground |
| Pin 57 | VDD — Positive supply 2.3V to 3.6V |
| Pin 58 | RF2 — I/O port F bit 2 |
| Pin 59 | RF3 — I/O port F bit 3 |
| Pin 60 | RF4 — I/O port F bit 4 |
| Pin 61 | RF6 — I/O port F bit 6 |
| Pin 62 | RC12 — I/O port C bit 12 |
| Pin 63 | RC13 — I/O port C bit 13 |
| Pin 64 | RC14 — I/O port C bit 14 |
| Pin 65 | EP — Exposed thermal pad, must be soldered to PCB ground |
Typical Applications
PIC32MX440F256H-80I/MR is suitable for 7 applications: USB HID / CDC / Mass Storage Peripheral, USB Host Controller and Embedded USB Hub, Industrial Control and HMI Panel, Portable Consumer Electronics, Building Automation Controller, Data Logger with USB Mass Storage, Sensor Hub and IoT Edge Node.
USB HID / CDC / Mass Storage Peripheral
The PIC32MX440F256H-80I/MR is purpose-built for USB peripherals because it integrates a USB 2.0 On-The-Go controller with on-chip PHY and a dedicated DMA channel, eliminating the need for an external transceiver and reducing BOM cost. Its 80 MHz MIPS M4K core running at 105 DMIPS can comfortably drive the USB polling rate plus HID, CDC, or Mass Storage class stacks without dropping frames, while 256 KB Flash and 32 KB SRAM provide ample headroom for the USB stack plus application firmware. The 64-pin QFN package exposes up to 53 GPIO, allowing designers to add buttons, LEDs, encoders, and sensors directly without external expanders. The 10-bit 1 Msps ADC enables analog sensor sampling synchronized with USB transfers for data-logging peripherals.
Recommended
USB Host Controller and Embedded USB Hub
The PIC32MX440F256H-80I/MR supports USB On-The-Go host mode, allowing the MCU to enumerate and control downstream USB devices such as flash drives, keyboards, or printers without an external host controller. The integrated PHY and dedicated DMA channel ensure sustained USB throughput while leaving the CPU free for application logic such as file-system handling or HID event processing. The 80 MHz MIPS M4K core provides sufficient cycles to run the USB host stack plus a FAT file system, while 256 KB Flash accommodates the host stack and 32 KB SRAM buffers USB transfer descriptors. Industrial -40C to +85C rating allows deployment in factory-floor USB host applications such as data-collection terminals and kiosk interfaces.
Recommended
Industrial Control and HMI Panel
The PIC32MX440F256H-80I/MR fits industrial HMI panels because of its high GPIO count (53 pins), 2 UART ports for RS-232/RS-485 links, 2 I2C for sensor and EEPROM expansion, 2 SPI for display drivers and external memory, and 10-bit 1 Msps ADC for analog sensor reads. The 80 MHz core provides responsive touch and menu handling, while 256 KB Flash and 32 KB SRAM hold full HMI state machines and graphics rendering logic. The 64-pin QFN (MR, 9x9 mm) package is suitable for compact panel designs, and the industrial -40C to +85C temperature rating supports deployment in factory environments. The RTCC enables accurate timekeeping for scheduler and event-log features common in industrial controls.
Recommended
Portable Consumer Electronics
The PIC32MX440F256H-80I/MR suits portable consumer products that need USB charging, USB device connectivity, and reasonable compute in a compact footprint. The 2.3 V to 3.6 V supply range supports direct operation from a single Li-ion cell via a buck regulator, and the integrated USB OTG enables both device charging and USB data roles. The 32 KB SRAM comfortably buffers audio or sensor streams, while 256 KB Flash holds application firmware plus USB stacks and BLE-like protocols. The 64-pin QFN package is well-suited for small-form-factor designs, and the 5-stage pipelined MIPS M4K core maintains low interrupt latency for responsive user interfaces and button debouncing.
Recommended
Building Automation Controller
The PIC32MX440F256H-80I/MR's combination of USB for commissioning or diagnostics, 53 GPIO for sensor and actuator interfacing, 2 UART for BACnet or Modbus links, and 10-bit ADC for analog measurements such as temperature, humidity, and light levels makes it well-suited for building automation controllers. The 256 KB Flash and 32 KB SRAM can hold a full automation rule engine plus communications stacks, while the 80 MHz MIPS M4K core handles multiple simultaneous protocol timers and interrupt-driven I/O. The industrial -40C to +85C temperature range supports unheated equipment rooms, and the RTCC provides accurate time-of-day scheduling. USB OTG allows field technicians to attach a tablet or laptop for direct configuration.
Recommended
Data Logger with USB Mass Storage
The PIC32MX440F256H-80I/MR is a strong fit for USB data loggers because its USB OTG controller can act as a Mass Storage device exposing internal or external memory as a USB drive. Combined with the 10-bit 1 Msps ADC, the MCU can sample multiple analog channels at high rates, store data in 32 KB SRAM plus external SPI flash, and then expose logs as a USB drive when plugged into a host PC. The 80 MHz MIPS M4K core provides enough compute for data compression and timestamping, while 256 KB Flash accommodates the logger firmware plus FAT32 stack. The industrial temperature range supports outdoor and vehicular logger deployments.
Recommended
Sensor Hub and IoT Edge Node
The PIC32MX440F256H-80I/MR supports sensor-hub and edge-node applications because its 2 UART, 2 I2C, and 2 SPI buses can connect simultaneously to multiple sensors (accelerometers, temperature, pressure) and radios. The 80 MHz MIPS M4K core delivers 105 DMIPS, sufficient for local signal processing and threshold-based decisions before transmitting over USB or another interface. The 256 KB Flash and 32 KB SRAM accommodate multi-protocol stacks, while the 10-bit 1 Msps ADC handles analog sensor sampling at audio-rate frequencies. The industrial temperature range and 64-pin QFN (MR, 9x9 mm) package support compact industrial edge devices that need USB for commissioning and updates.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX440F256H-80I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX450F256H-80I/MR | PIC32MX340F256H-80I/MR | PIC32MX440F128H-80I/MR | PIC32MX470F256H-80I/MR | PIC32MX430F256H-80I/MR | PIC32MX440F256HT-80I/MR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-64 (MR, 9x9 mm) | QFN-64 (MR, 9x9 mm) - same | QFN-64 (MR, 9x9 mm) - same | QFN-64 (MR, 9x9 mm) - same | QFN-64 (MR, 9x9 mm) - same | QFN-64 (MR, 9x9 mm) - same | QFN-64 (MR, 9x9 mm) - same |
| Core | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS | MIPS32 M4K, 80 MHz, 105 DMIPS |
| Flash | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB OTG | Yes (integrated PHY) | Yes | No (MX3xx has no USB) | Yes | Yes | Yes | Yes |
| I/O Pins | 53 | 53 | 53 | 53 | 53 | 53 | 53 |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Param Match vs This Part | 100% | 100% (drop-in upgrade) | 90% (no USB OTG) | 80% (Flash halved) | 95% | 85% | 100% (T&R variant) |
Key Differentiators
- Integrated USB 2.0 OTG with on-chip PHY and dedicated DMA (vs PIC32MX340F256H-80I/MR)
- 2x larger Flash than MX440F128H variant (vs PIC32MX440F128H-80I/MR)
- Same footprint as MX450, MX470, MX430 family drop-ins (vs PIC32MX450F256H-80I/MR)
- True 64-pin QFN tape-and-reel variant available (vs PIC32MX440F256HT-80I/MR)
Design Notes
Place a 10 uF ceramic (X5R/X7R) bulk capacitor on each VDD pin pair (pins 15/29/39/57) and a 0.1 uF decoupling capacitor within 3 mm of each VDD pin to suppress switching noise. Pin 6 (VCAP) requires a low-ESR 10 uF capacitor to Vss for the internal 1.8 V regulator; do not connect external load to VCAP. VUSB (pin 11) needs a 0.1 uF decoupling capacitor to Vss to stabilize the internal USB transceiver. Estimated: with VDD = 3.3 V and 80 MHz active, typical Icore is approximately 50 mA, requiring bulk capacitors that can source transient current without droop below 2.3 V.
Route the USB D+ (pin 12) and D- (pin 13) lines as a 90 ohm differential pair with length matching within 150 mil to comply with USB 2.0 full-speed signaling. Keep them away from switching signals and place the VUSB 0.1 uF decoupling capacitor adjacent to pin 11. The crystal traces between OSC1 (pin 4) and OSC2 (pin 5) and the crystal should be short and symmetric with a ground guard ring, as recommended in the PIC32MX3XX/4XX Family Data Sheet section 2. The exposed pad (pin 65) must be soldered to a continuous ground plane with thermal vias to dissipate package power and provide low-impedance ground.
Do not omit the 10 uF VCAP capacitor (pin 6) - the internal voltage regulator cannot operate without it and the device will reset or fail to start. The PGEC1/PGED1 and PGEC2/PGED2 pairs (pins 36-37 and 7-8) are used for ICSP programming; route them to accessible test points or connector. When migrating from the PIC32MX3xx family, note that USB OTG registers and DMA channels are entirely absent from MX3xx; firmware must be recompiled and revalidated against the MX4xx header file. Estimated: the device draws 50-70 mA in active mode and 20-40 uA in sleep, so verify your power budget supports full-speed USB enumeration plus application tasks.
The QFN-64 (MR) package dissipates heat primarily through the exposed pad (pin 65). Solder this pad to a ground copper area with a recommended array of 9 to 16 thermal vias to the inner ground plane. For typical 80 MHz active use with peripheral activity, expect approximately 0.2 W to 0.3 W dissipation, well within the package's thermal envelope. Estimated: at 25 C ambient, the 0.3 W dissipation produces a 12 C junction temperature rise when the exposed pad is soldered to a 1 square inch copper pour on the PCB, comfortably below the 125 C maximum junction rating.
Compliance Information
RoHS and REACH compliant per Microchip product environmental compliance documentation. Lead-free QFN package per the 'MR' suffix per datasheet marking. Industrial temperature grade only - AEC-Q100 automotive qualification not applicable to this part. Microchip provides conflict minerals compliance under their RMI template.
