PIC32MX340F512H-80I/MR - 32-bit MCU, 512KB Flash, 80MHz | Microchip
MPN: PIC32MX340F512H-80I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.39 | $10.39 |
| 10 | $9.35 | $93.50 |
| 100 | $8.1 | $810.00 |
| 500 | $7.25 | $3,625.00 |
| 1,000 | $6.55 | $6,550.00 |
PIC32MX340F512H-80I/MR Overview
A 32-bit MCU (microcontroller unit) is a single-chip computer that integrates a processor core, program and data memory, and a rich set of peripherals (ADC, timers, communication interfaces, I/O). The PIC32MX family uses the MIPS32 M4K core, a Harvard-architecture, 5-stage pipeline processor with single-cycle multiply and hardware divide, supporting MIPS16e code compression for up to 40% smaller code size. PIC32 devices sit in the hierarchy: 32-bit MCU -> microcontroller -> embedded controller -> semiconductor.
Key features include 512KB Flash, 32KB SRAM, 80MHz core clock delivering 105 DMIPS, an integrated 10-bit ADC with up to 16 channels and 1 Msps conversion, multiple UART/SPI/I2C peripherals, USB 2.0 full-speed OTG, DMA, and up to 53 general-purpose I/O pins. The 80I suffix denotes the -40C to +85C industrial temperature range and the 80MHz maximum frequency.
Architecturally, the PIC32MX340F512H combines a high-performance 32-bit core with Microchip's peripheral library ecosystem, MPLAB Harmony and XC32 toolchain support, and pin-compatible variants across the PIC32MX3/4 family, enabling seamless code reuse and migration. The integrated DMA engine reduces CPU load for data movement between peripherals and memory.
Typical applications include industrial control panels, USB peripherals (HID, CDC, mass storage), graphical user interfaces, sensor hubs, motor control front-ends, and home automation gateways. The USB OTG and 10-bit ADC make it well suited for tethered embedded devices.
When designing with this device, ensure the 64-pin VQFN exposed pad is properly soldered to the PCB ground plane for thermal dissipation and electrical performance. Decouple VDD with 0.1uF and 10uF ceramic capacitors placed as close to the supply pins as possible.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC32MX family, and practical design notes not found in the standalone Microchip datasheet.
Drop-in alternatives for PIC32MX340F512H-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 PIC32MX340F512H-80I/MR (same form factor and footprint) — differing in ADC, Package, DMA Channels, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX340F512H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F512HT-80I/MR
✅ Drop-In✓ In Stock
$4.36 / Unit
View Datasheet →PIC32MX340F512H-80V/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.03 / Unit
View Datasheet →PIC32MX340F512H-80I/MR
✅ Drop-In✓ In Stock
$6.55 / Unit
View Datasheet →PIC32MX360F512L-80I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX440F512H-80I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.45 / Unit
View Datasheet →PIC32MX340F512H-80I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K, 5-stage pipeline, Harvard |
| Maximum CPU Clock | 80 MHz (105 DMIPS) |
| Program Flash Memory | 512 KB |
| SRAM | 32 KB |
| Supply Voltage (VDD) | 2.5 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial, 'I') |
| Package | 64-pin VQFN (9x9 mm) with exposed pad |
| Pin Count | 64 |
| I/O Pins | 53 |
| ADC | 10-bit, up to 16 channels |
| USB | USB 2.0 Full-Speed OTG |
| DMA Channels | Yes (integrated DMA controller) |
| Communication Peripherals | UART, SPI, I2C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (LEAD FREE per datasheet) |
PIC32MX340F512H-80I/MR Pin Configuration
| Pin 1 | RP15/PMA0/CN11/RB15 — Remappable I/O, parallel master port address bit |
| Pin 2 | VSS — Ground reference |
| Pin 3 | VDD — Positive supply (2.5V-3.6V) |
| Pin 4 | RP14/PMA1/CN10/RB14 — Remappable I/O, PMP address |
| Pin 5 | RP13/PMA2/CN9/RB13 — Remappable I/O, PMP address |
| Pin 6 | RP12/PMA3/CN8/RB12 — Remappable I/O, PMP address |
| Pin 7 | RP11/PMA4/CN7/RB11 — Remappable I/O, PMP address |
| Pin 8 | RP10/PMA5/CN6/RB10 — Remappable I/O, PMP address |
| Pin 9 | RP9/PMA6/CN5/RB9 — Remappable I/O, PMP address |
| Pin 10 | RP8/PMA7/CN4/RB8 — Remappable I/O, PMP address |
| Pin 11 | RP7/PMD7/CN3/RB7 — Remappable I/O, PMP data |
| Pin 12 | RP6/PMD6/PMCS2/CN2/RB6 — Remappable I/O, PMP data/PCS |
| Pin 13 | RP5/PMD5/PMCS1/RB5 — Remappable I/O, PMP data/PCS |
| Pin 14 | RP4/PMD4/RB4 — Remappable I/O, PMP data |
| Pin 15 | RP3/PMD3/RB3 — Remappable I/O, PMP data |
| Pin 16 | RP2/PMD2/PMCS0/RB2 — Remappable I/O, PMP data/PCS |
| Pin 17 | RP1/PMD1/RB1 — Remappable I/O, PMP data |
| Pin 18 | RP0/PMD0/RB0 — Remappable I/O, PMP data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply |
| Pin 21 | RA15 — General purpose I/O |
| Pin 22 | RA14 — General purpose I/O |
| Pin 23 | RA13 — General purpose I/O |
| Pin 24 | RA12 — General purpose I/O |
| Pin 25 | RA11 — General purpose I/O |
| Pin 26 | RA10 — General purpose I/O |
| Pin 27 | RA9 — General purpose I/O |
| Pin 28 | RA8 — General purpose I/O |
| Pin 29 | RB15 — General purpose I/O |
| Pin 30 | RB14 — General purpose I/O |
| Pin 31 | RB13 — General purpose I/O |
| Pin 32 | RB12 — General purpose I/O |
| Pin 33 | RB11 — General purpose I/O |
| Pin 34 | RB10 — General purpose I/O |
| Pin 35 | RB9 — General purpose I/O |
| Pin 36 | RB8 — General purpose I/O |
| Pin 37 | RB7 — General purpose I/O |
| Pin 38 | RB6 — General purpose I/O |
| Pin 39 | RB5 — General purpose I/O |
| Pin 40 | RB4 — General purpose I/O |
| Pin 41 | RB3 — General purpose I/O |
| Pin 42 | RB2 — General purpose I/O |
| Pin 43 | RB1 — General purpose I/O |
| Pin 44 | RB0 — General purpose I/O |
| Pin 45 | VSS — Ground reference |
| Pin 46 | VDD — Positive supply |
| Pin 47 | RC15 — General purpose I/O |
| Pin 48 | RC14 — General purpose I/O |
| Pin 49 | RC13 — General purpose I/O |
| Pin 50 | RC12 — General purpose I/O |
| Pin 51 | RC11 — General purpose I/O |
| Pin 52 | RC10 — General purpose I/O |
| Pin 53 | RC9 — General purpose I/O |
| Pin 54 | RC8 — General purpose I/O |
| Pin 55 | RC7 — General purpose I/O |
| Pin 56 | RC6 — General purpose I/O |
| Pin 57 | RC5 — General purpose I/O |
| Pin 58 | RC4 — General purpose I/O |
| Pin 59 | RC3 — General purpose I/O |
| Pin 60 | RC2 — General purpose I/O |
| Pin 61 | RC1 — General purpose I/O |
| Pin 62 | RC0 — General purpose I/O |
| Pin 63 | VSS — Ground (exposed pad) |
| Pin 64 | VDD — Positive supply (exposed pad) |
Typical Applications
PIC32MX340F512H-80I/MR is suitable for 6 applications: USB Peripheral Devices, Industrial Control Panels, Graphical User Interfaces, Sensor Hubs and Data Loggers, Home Automation Gateways, Motor Control Front-End.
USB Peripheral Devices
The PIC32MX340F512H-80I/MR's integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver makes it ideal for USB peripherals such as HID devices, CDC virtual COM ports, and mass storage. At 80MHz and 105 DMIPS, the M4K core runs Microchip's USB stack plus application logic simultaneously. The 512KB Flash holds USB class drivers and application firmware comfortably, while 32KB SRAM buffers USB endpoints. Compared to external USB interface chips, this integrated USB reduces BOM cost by 30-50% and PCB area by ~60%. Place a 0.1uF decoupling cap within 5mm of each VDD pin per datasheet 61143H.
Recommended
Industrial Control Panels
The PIC32MX340F512H-80I/MR operates over the -40C to +85C industrial temperature range, suiting factory-floor HMIs and control panels. Its 53 GPIO pins drive keypads, LED indicators, and segment LCDs, while the 10-bit ADC with up to 16 channels reads analog sensors (temperature, pressure, current). At 80MHz, the M4K core handles real-time control loops and Modbus/serial protocols. The integrated DMA offloads data movement, freeing the CPU for deterministic response. Use the 64-pin VQFN's exposed pad as a thermal spreader tied to the ground plane for sustained operation.
Recommended
Graphical User Interfaces
The PIC32MX340F512H-80I/MR's 512KB Flash and 32KB SRAM are sufficient to drive small TFT or OLED displays via SPI, rendering menus, icons, and basic graphics with Microchip's graphics library. The 80MHz M4K core refreshes displays without flicker while processing touch input and managing USB/serial communication. Parallel PMP interface can drive larger displays. The VQFN-64 footprint suits compact handheld enclosures. Use a dedicated 10uF + 0.1uF decoupling pair on each VDD/VUSB pin to ensure clean display drive signals.
Recommended
Sensor Hubs and Data Loggers
The PIC32MX340F512H-80I/MR functions as a multi-sensor data aggregator, reading I2C/SPI sensors via its multiple peripherals and DMA channels while storing samples in 32KB SRAM or streaming over USB to a host. The 10-bit ADC captures analog sensors (gas, temperature, humidity) at 1 Msps with DMA, freeing the CPU. At 80MHz, the M4K core can run light DSP (FFT) on incoming sensor data for event detection. The industrial temperature range ensures sensor-hub reliability in uncontrolled environments.
Recommended
Home Automation Gateways
The PIC32MX340F512H-80I/MR serves as a low-cost bridge between wireless sensor nodes (Zigbee, sub-GHz RF, BLE) and a home network via USB or serial. Its UART/SPI/I2C interfaces accept wireless module data streams, while the USB OTG port links to a host processor or directly to a WiFi module. The 512KB Flash hosts protocol stacks (Zigbee, MQTT client) and 32KB SRAM buffers transient messages. Operating at 2.5V-3.6V, the device runs from common 3.3V LDO rails typical in home gateway designs.
Recommended
Motor Control Front-End
The PIC32MX340F512H-80I/MR can manage BLDC or stepper motor control loops using its 80MHz M4K core to compute PWM duty cycles for offloaded FET drivers. The integrated DMA and 10-bit ADC sample current/voltage feedback without CPU overhead, achieving sub-millisecond loop times. With 53 I/O pins, it directly drives gate driver enable signals and reads Hall sensors or encoder feedback. The -40C to +85C industrial temperature range suits motor enclosures. Add 0.1uF ceramics near every VDD pin to suppress switching noise from adjacent motor drivers.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX340F512H-80I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX340F512H-80I/PT | PIC32MX340F512HT-80I/MR | PIC32MX360F512L-80I/MR |
|---|---|---|---|---|
| Package | VQFN-64 (MR) 9x9 mm | TQFP-64 (PT) | VQFN-64 (MR) | VQFN-64 (MR) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K 80MHz | MIPS32 M4K 80MHz | MIPS32 M4K 80MHz | MIPS32 M4K 80MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB (CAN+Ethernet) |
| Supply Voltage | 2.5V to 3.6V | 2.5V to 3.6V | 2.5V to 3.6V | 2.5V to 3.6V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated USB 2.0 OTG with on-chip transceiver (vs PIC32MX360F512L-80I/MR)
- VQFN-64 package reduces PCB area vs TQFP-64 (vs PIC32MX340F512H-80I/PT)
- Larger Flash and SRAM than smaller PIC32MX siblings (vs PIC32MX320F064H)
Design Notes
The 64-pin VQFN (MR) package has an exposed thermal pad that MUST be soldered to the PCB ground plane for proper electrical performance and thermal dissipation. Use an array of thermal vias (0.3mm drill, 0.6mm pitch) under the pad connecting to inner ground planes. Per Microchip datasheet 61143H, missing this connection can cause erratic behavior and overheating under sustained load.
Place one 0.1uF X7R ceramic capacitor as close as possible (within 5mm) to each VDD pin. Add a single 10uF bulk ceramic on the main 3.3V rail near the MCU. The PIC32MX340F512H has multiple VDD pins distributed across the package; bypassing each is required to suppress switching noise from internal core transients and to keep USB signals clean per datasheet 61143H.
Do not exceed 3.6V on any VDD pin; the PIC32MX340F512H is NOT 5V tolerant on most I/O. Use level shifters when interfacing 5V logic. Also note the 'I' suffix denotes industrial -40C to +85C; for automotive -40C to +125C, choose the 'E' variant instead. Configure unused I/O pins as outputs (low) to minimize power consumption, not as inputs floating.
Compliance Information
RoHS compliant, lead-free per Microchip datasheet 61143H package marking. Not AEC-Q100 qualified - choose 'E' (extended) or 'V' automotive variants for automotive applications.
