PIC32MX440F256HT-80I/PT - 80MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX440F256HT-80I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.2 | $9.20 |
| 10 | $8.45 | $84.50 |
| 100 | $7.55 | $755.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $6.2 | $6,200.00 |
PIC32MX440F256HT-80I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a mix of peripherals such as timers, ADC, communication interfaces, and I/O pins. Within the broader semiconductor taxonomy, an MCU belongs to microcontrollers -> integrated circuits -> semiconductors. The PIC32MX family uses the MIPS32 M4K core, a Harvard-architecture RISC processor capable of 1.56 DMIPS/MHz, positioning it above 8-bit/16-bit MCUs in raw computational throughput for embedded workloads.
Key features of this part include 256 KB (256K x 8) Flash, 32 KB SRAM, a Full-Speed USB 2.0 OTG controller, up to 53 general-purpose I/O pins, 16-channel 10-bit ADC with 1 Msps conversion, five 16-bit timers/counters, I2S/SPT for audio, I2C, SPI, and UART peripherals. Supply voltage spans 2.5V to 3.6V, with an industrial operating range of -40C to +85C. An integrated 8 MHz internal oscillator with PLL supports the 80 MHz system clock.
Architecturally, the device pairs the M4K core with a dedicated DMA controller and peripheral bus, which can offload data movement for USB, ADC, and SPI transactions. Code protection, a 5V-tolerant digital I/O subset (mapped to specific pins), and JTAG/ICSP debug interfaces are built in. Compared to PIC24/dsPIC parts, this PIC32 offers a 32-bit datapath and deterministic interrupt latency, simplifying porting of RTOS kernels such as FreeRTOS.
Typical applications for the PIC32MX440F256HT-80I/PT include USB peripherals (HID, CDC, mass storage), industrial control and HMI panels, audio processing with I2S codecs, sensor hubs, and low-cost graphical user interfaces driving small TFT displays. The 256 KB Flash accommodates moderate-sized protocol stacks (USB, TCP/IP via MLA) plus application code without requiring external memory.
When designing with this device, plan I/O assignments carefully: not all pins are 5V-tolerant, and USB D+/D- must be routed as a 90-ohm differential pair. A 12 MHz crystal is recommended for USB Full-Speed compliance, while the internal 8 MHz oscillator suffices for non-USB designs. Decoupling should follow Microchip's recommended 0.1 uF + 1 uF per VDD/AVDD pair.
This page synthesizes distributor pricing, same-family drop-in alternatives, and design notes not aggregated on any single distributor listing.
Drop-in alternatives for PIC32MX440F256HT-80I/PT — 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-80I/PT (same form factor and footprint) — differing in ADC, Package, Timers, Core Architecture, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX460F256L-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX450F256H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX360F256L-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F256H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX440F256HT-80I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Bit Width | 32-bit |
| Max CPU Clock | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Supply Voltage (VDD) | 2.5 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 53 |
| Package | 64-pin TQFP (PT), 10x10 mm |
| USB | USB 2.0 Full-Speed OTG |
| ADC | 10-bit, 16-channel, 1 Msps |
| Timers | 5 x 16-bit |
| Communication | I2C, SPI, UART, I2S/SPT |
| DMA Channels | Yes (integrated) |
| Debug Interface | JTAG / ICSP (2-wire) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC32MX440F256HT-80I/PT Pin Configuration
| Pin 1 | RP29/PMD5/RE5 — Remappable I/O / Parallel Master Port data |
| Pin 2 | RP30/PMD6/RE6 — Remappable I/O / Parallel Master Port data |
| Pin 3 | RP31/PMD7/RE7 — Remappable I/O / Parallel Master Port data |
| Pin 4 | RC1 — Remappable I/O |
| Pin 5 | RC2 — Remappable I/O |
| Pin 6 | RC3 — Remappable I/O |
| Pin 7 | RC4 — Remappable I/O |
| Pin 8 | VSS — Ground |
| Pin 9 | VDD — Digital supply voltage 2.5-3.6V |
| Pin 10 | RB5/PGEC2 — Remappable I/O / ICSP clock |
| Pin 11 | RB6/PGED2 — Remappable I/O / ICSP data |
| Pin 12 | RB7 — Remappable I/O |
| Pin 13 | RB8 — Remappable I/O |
| Pin 14 | RB9 — Remappable I/O |
| Pin 15 | RB10 — Remappable I/O |
| Pin 16 | RB11 — Remappable I/O |
| Pin 17 | RB12 — Remappable I/O |
| Pin 18 | RB13 — Remappable I/O |
| Pin 19 | RB14 — Remappable I/O |
| Pin 20 | RB15 — Remappable I/O |
| Pin 21 | VSS — Ground |
| Pin 22 | VDD — Digital supply voltage 2.5-3.6V |
| Pin 23 | RD0 — Remappable I/O |
| Pin 24 | RD1 — Remappable I/O |
| Pin 25 | RD2 — Remappable I/O |
| Pin 26 | RD3 — Remappable I/O |
| Pin 27 | RD4 — Remappable I/O |
| Pin 28 | RD5 — Remappable I/O |
| Pin 29 | RD6 — Remappable I/O |
| Pin 30 | RD7 — Remappable I/O |
| Pin 31 | VSS — Ground |
| Pin 32 | VDD — Digital supply voltage 2.5-3.6V |
| Pin 33 | D+ — USB D+ data line |
| Pin 34 | D- — USB D- data line |
| Pin 35 | VBUS — USB bus voltage detect |
| Pin 36 | RA0 — Remappable I/O |
| Pin 37 | RA1 — Remappable I/O |
| Pin 38 | RA2 — Remappable I/O |
| Pin 39 | RA3 — Remappable I/O |
| Pin 40 | RA4 — Remappable I/O |
| Pin 41 | RA5 — Remappable I/O |
| Pin 42 | RA6 — Remappable I/O |
| Pin 43 | RA7 — Remappable I/O |
| Pin 44 | VSS — Ground |
| Pin 45 | VDD — Digital supply voltage 2.5-3.6V |
| Pin 46 | RB0 — Remappable I/O / Programming |
| Pin 47 | RB1 — Remappable I/O |
| Pin 48 | RB2 — Remappable I/O |
| Pin 49 | RB3 — Remappable I/O |
| Pin 50 | RB4 — Remappable I/O |
| Pin 51 | RC12 — Remappable I/O |
| Pin 52 | RC13 — Remappable I/O |
| Pin 53 | RC14 — Remappable I/O |
| Pin 54 | RC15 — Remappable I/O |
| Pin 55 | RF0 — Remappable I/O |
| Pin 56 | RF1 — Remappable I/O |
| Pin 57 | RF2 — Remappable I/O |
| Pin 58 | RF3 — Remappable I/O |
| Pin 59 | RF4 — Remappable I/O |
| Pin 60 | VSS — Ground |
| Pin 61 | VDD — Digital supply voltage 2.5-3.6V |
| Pin 62 | RF5 — Remappable I/O |
| Pin 63 | OSC1/CLKI/RA8 — Crystal oscillator input / external clock |
| Pin 64 | OSC2/CLKO/RA9 — Crystal oscillator output |
Typical Applications
PIC32MX440F256HT-80I/PT is suitable for 6 applications: USB HID / CDC Peripherals, Industrial Control & HMI Panels, Audio Processing with I2S Codecs, Sensor Hubs and IoT Edge Nodes, Low-Cost Graphical User Interfaces, Consumer Medical Devices (Non-Critical).
USB HID / CDC Peripherals
The PIC32MX440F256HT-80I/PT's integrated USB 2.0 Full-Speed OTG controller, 256 KB Flash, and 80 MHz MIPS32 M4K core make it a strong fit for USB Human Interface Devices (HID), Communication Device Class (CDC) bridges, and composite USB peripherals. The 32 KB SRAM handles HID report buffers plus MLA USB stack overhead without external memory. Compared to lower-speed MCUs that require external USB ASICs, this single-chip solution reduces BOM cost. For best USB signal integrity, route the D+/D- pair (pins 33 and 34) as a 90-ohm differential with 4 mm spacing and tie VBUS through a 10 kohm pull-down.
Recommended
Industrial Control & HMI Panels
The PIC32MX440F256HT-80I/PT's 53 GPIO pins, 16-channel 10-bit ADC, and -40C to +85C industrial temperature range suit PLC-style I/O expanders, motor-control signal conditioning, and small HMI touch panels. Its DMA controller offloads ADC scan and SPI display refresh, freeing the 80 MHz core for control loop math above 10 kHz. Compared to PIC24 alternatives, the 32-bit datapath simplifies 32-bit accumulator math for PID loops. Suggested PCB practice: keep ADC traces short, place 0.1 uF + 1 uF decoupling pairs per VDD/AVDD pin group, and add ferrite beads between digital and analog supplies.
Recommended
Audio Processing with I2S Codecs
The PIC32MX440F256HT-80I/PT integrates an I2S/SPT peripheral that streams digital audio to external codecs at up to 48 kHz sample rates. Its 32 KB SRAM supports small audio buffers and effect processing at 80 MHz - enough for reverb/echo or graphic EQ at modest complexity. The DMA controller moves samples between I2S and SRAM without CPU intervention, freeing cycles for UI code. For designs requiring multi-channel audio or DSP-grade sample rates, consider dsPIC33 parts with dedicated DSP instructions instead.
Recommended
Sensor Hubs and IoT Edge Nodes
The PIC32MX440F256HT-80I/PT serves as an edge sensor hub: its SPI and I2C controllers aggregate data from multiple sensors, while 256 KB Flash stores aggregation algorithms and lightweight TCP/IP stacks. The 16 ADC channels accept analog sensor inputs directly, and the integrated DMA pumps ADC conversion results into memory without waking the CPU. Compared to 8-bit PIC16 alternatives, the 32-bit core cuts sensor-fusion latency by 4x. For battery-powered deployments, the PIC32MX1xx/2xx families offer lower active power at the cost of CPU throughput.
Recommended
Low-Cost Graphical User Interfaces
The PIC32MX440F256HT-80I/PT drives small TFT displays (up to 320x240 QVGA) through its parallel PMP interface, with framebuffers held in the 32 KB SRAM for monochrome panels or partially offloaded to display RAM for color panels. Its 80 MHz throughput refreshes simple UIs at 30+ fps, and 256 KB Flash accommodates graphics libraries plus application menus. Compared to PIC24 devices, the wider datapath accelerates pixel rendering. Use DMA to pump framebuffer data to the PMP peripheral in the background while the CPU draws incremental changes.
Recommended
Consumer Medical Devices (Non-Critical)
For non-critical wellness and consumer-grade medical devices such as fitness monitors, the PIC32MX440F256HT-80I/PT offers 256 KB Flash for storing BLE/USB data logs and signal-processing firmware. Its 10-bit ADC and DSP-friendly instruction set handle simple pulse and respiration signal extraction at modest sample rates. The -40C to +85C range covers home and wearable environments. Note: For FDA-regulated or IEC 60601-compliant designs, additional hardware redundancy, watchdog timers, and validated firmware are required.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX440F256HT-80I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX460F256L-80I/PT | PIC32MX450F256H-80I/PT | PIC32MX360F256L-80I/PT | PIC32MX340F256H-80I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT), 10x10 mm | TQFP-64 (PT), 10x10 mm - same | TQFP-64 (PT), 10x10 mm - same | TQFP-64 (PT), 10x10 mm - same | TQFP-64 (PT), 10x10 mm - same |
| Core Architecture | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Max CPU Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG + CAN | USB 2.0 Full-Speed OTG + Crypto | No USB | USB 2.0 Full-Speed |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG controller (vs PIC32MX360F256L-80I/PT)
- Higher SRAM capacity than PIC24 baseline (vs PIC32MX230F256H-50I/PT)
- More GPIO and richer peripheral mix (vs PIC32MX220F032B-I/SO)
Design Notes
Decoupling: place a 0.1 uF ceramic on each VDD pin (10, 22, 32, 45, 61) and one 1 uF to 10 uF bulk capacitor per VDD cluster, all within 3 mm of the pin. For the AVDD supply (when using the ADC), add a ferrite bead and a separate 10 uF + 0.1 uF pair to isolate analog and digital noise. Per the PIC32MX3XX/4XX family datasheet (61143H), inadequate decoupling can cause ADC accuracy to degrade by 2-3 LSB.
USB D+/D- routing (pins 33 and 34): keep the differential pair matched to within 0.15 mm over a maximum length of 50 mm. Maintain a characteristic differential impedance of 90 ohms +/- 10% using 4 mm trace width and 0.2 mm spacing on a standard 4-layer FR4 stack-up. Place the 15 kohm pull-down on D- (for full-speed device detection) close to the connector. ESD protection (e.g., USBLC6-2SC6) should sit within 5 mm of the connector.
Crystal selection: for USB Full-Speed, use a 12 MHz crystal with +/- 50 ppm tolerance and load capacitance matched to the crystal spec; the internal 8 MHz oscillator does not meet USB timing. For non-USB designs the internal 8 MHz with PLL can replace the crystal, saving cost. Do not exceed 3.6V on any VDD pin - absolute maximum ratings per the datasheet (61143H) state 4.0V is the destructive limit. Use ICD/ICSP headers for in-circuit debugging.
Compliance Information
RoHS compliant per Microchip product page (PT suffix denotes lead-free TQFP). Not AEC-Q100 qualified - choose PIC32MX automotive variants for vehicle applications. Halogen-free status not explicitly listed in distributor data; defaults to unknown.
