PIC32MX340F128HT-80V/MR - 32-bit MCU 128KB Flash 80MHz 64-VQFN | Microchip
MPN: PIC32MX340F128HT-80V/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.27 | $6.27 |
| 10 | $5.78 | $57.80 |
| 100 | $5.12 | $512.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.92 | $3,920.00 |
PIC32MX340F128HT-80V/MR Overview
What is a PIC32MX microcontroller? A PIC32MX is a 32-bit MIPS-based microcontroller (MCU) from Microchip's PIC family, sitting hierarchically under: MCU -> microcontroller -> microcontroller IC -> embedded processor. The PIC32MX series replaced earlier 8-bit and 16-bit PIC architectures, delivering MIPS32 M4K core performance with the extensive PIC peripheral ecosystem (ADC, UART, SPI, I2C, USB, CAN on some variants) and MPLAB X IDE compatibility. The "MX340" sub-family is positioned as a general-purpose 80MHz line with USB 2.0 full-speed OTG, 16-bit timers, and up to 128KB Flash.
Key features include: 128KB (128K x 8) Flash program memory, 32KB SRAM, 80MHz maximum CPU clock with 1.56 DMIPS/MHz performance, 10-bit ADC with up to 16 channels, integrated DMA controller for offloading CPU data movement, and 53 digital I/O pins. The 64-VQFN (9x9 mm) package provides a compact thermal-enhanced footprint for space-constrained designs.
The PIC32MX340F128HT uses Microchip's MIPS32 M4K core with 5-stage pipeline and hardware multiply/divide. The 'T' suffix denotes tape-and-reel packaging; the 'V' suffix denotes the -40C to +105C automotive temperature grade. The exposed pad (EP) on the VQFN-64 package must be soldered to a thermal pad on the PCB for proper heat dissipation and electrical grounding.
Typical applications include industrial automation controllers, USB peripherals, automotive body and HMI modules, medical monitoring devices, and consumer electronics. The 10-bit ADC, DMA, and rich peripheral set also suit sensor-fusion IoT nodes, motor-control front-ends, and human-machine interface panels.
When designing with this part, note that the 'V' automotive temperature grade (-40C to +105C) is required for AEC-Q100-style applications; otherwise choose the 'I' industrial grade (-40C to +85C). Ensure the exposed pad is properly soldered for thermal performance.
This page consolidates distributor pricing, drop-in alternatives within the PIC32MX family, and practical design notes that go beyond the manufacturer datasheet, helping engineers source, compare, and qualify the PIC32MX340F128HT-80V/MR efficiently.
Drop-in alternatives for PIC32MX340F128HT-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 PIC32MX340F128HT-80V/MR (same form factor and footprint) — differing in ADC, Package, Core Architecture, DMA Channels, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX340F128H-80V/MR
✅ Drop-In✓ In Stock
$3.72 / Unit
View Datasheet →PIC32MX340F128HT-80I/MR
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →PIC32MX340F128HT-80V/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.6 / Unit
View Datasheet →PIC32MX340F128L-80V/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX340F128HT-V/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX330F128HT-V/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX340F128HT-80V/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Size | 32-bit |
| CPU Speed | 80 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| RAM Size | 32 KB (32K x 8) |
| Number of I/O | 53 |
| Package / Case | 64-VQFN Exposed Pad (9x9 mm) |
| Oscillator Type | Internal |
| ADC | 10-bit |
| DMA Controller | Yes |
| Operating Supply Voltage | 2.5 V to 3.3 V |
| Operating Temperature | -40C to +105C (V grade) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
PIC32MX340F128HT-80V/MR Pin Configuration
| Pin 1 | RA0 — PORTA bit 0 / AN0 / VREF+ |
| Pin 2 | RA1 — PORTA bit 1 / AN1 / VREF- |
| Pin 3 | RA2 — PORTA bit 2 / AN2 |
| Pin 4 | RA3 — PORTA bit 3 / AN3 |
| Pin 5 | RA4 — PORTA bit 4 / AN4 |
| Pin 6 | RA5 — PORTA bit 5 / AN5 |
| Pin 7 | RA6 — PORTA bit 6 / AN6 |
| Pin 8 | RA7 — PORTA bit 7 / AN7 |
| Pin 9 | RA8 — PORTA bit 8 / AN8 |
| Pin 10 | RA9 — PORTA bit 9 / AN9 |
| Pin 11 | RA10 — PORTA bit 10 / AN10 |
| Pin 12 | VDD — Positive supply voltage (2.5V-3.3V) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RB0 — PORTB bit 0 / PGED1 |
| Pin 15 | RB1 — PORTB bit 1 / PGEC1 |
| Pin 16 | RB2 — PORTB bit 2 / AN12 |
| Pin 17 | RB3 — PORTB bit 3 / AN13 |
| Pin 18 | RB4 — PORTB bit 4 / AN14 |
| Pin 19 | RB5 — PORTB bit 5 / AN15 |
| Pin 20 | RB6 — PORTB bit 6 |
| Pin 21 | RB7 — PORTB bit 7 |
| Pin 22 | RB8 — PORTB bit 8 |
| Pin 23 | RB9 — PORTB bit 9 |
| Pin 24 | RB10 — PORTB bit 10 |
| Pin 25 | RB11 — PORTB bit 11 |
| Pin 26 | RB12 — PORTB bit 12 |
| Pin 27 | RB13 — PORTB bit 13 |
| Pin 28 | RB14 — PORTB bit 14 |
| Pin 29 | RB15 — PORTB bit 15 |
| Pin 30 | VDD — Positive supply voltage (2.5V-3.3V) |
| Pin 31 | VSS — Ground reference |
| Pin 32 | RC1 — PORTC bit 1 |
| Pin 33 | RC2 — PORTC bit 2 |
| Pin 34 | RC3 — PORTC bit 3 |
| Pin 35 | RC4 — PORTC bit 4 |
| Pin 36 | RD0 — PORTD bit 0 |
| Pin 37 | RD1 — PORTD bit 1 |
| Pin 38 | RD2 — PORTD bit 2 |
| Pin 39 | RD3 — PORTD bit 3 |
| Pin 40 | RD4 — PORTD bit 4 |
| Pin 41 | RD5 — PORTD bit 5 |
| Pin 42 | RD6 — PORTD bit 6 |
| Pin 43 | RD7 — PORTD bit 7 |
| Pin 44 | RD8 — PORTD bit 8 |
| Pin 45 | RD9 — PORTD bit 9 |
| Pin 46 | RD10 — PORTD bit 10 |
| Pin 47 | RD11 — PORTD bit 11 |
| Pin 48 | RD12 — PORTD bit 12 |
| Pin 49 | RD13 — PORTD bit 13 |
| Pin 50 | RD14 — PORTD bit 14 |
| Pin 51 | RD15 — PORTD bit 15 |
| Pin 52 | RE0 — PORTE bit 0 / PMALL |
| Pin 53 | RE1 — PORTE bit 1 / PMALH |
| Pin 54 | RE2 — PORTE bit 2 |
| Pin 55 | RE3 — PORTE bit 3 |
| Pin 56 | RE4 — PORTE bit 4 |
| Pin 57 | RE5 — PORTE bit 5 |
| Pin 58 | RE6 — PORTE bit 6 |
| Pin 59 | RE7 — PORTE bit 7 |
| Pin 60 | RF0 — PORTF bit 0 |
| Pin 61 | RF1 — PORTF bit 1 / USB D- |
| Pin 62 | RF3 — PORTF bit 3 / USB D+ |
| Pin 63 | VUSB — USB voltage supply |
| Pin 64 | EP — Exposed pad - thermal pad / ground |
Typical Applications
PIC32MX340F128HT-80V/MR is suitable for 6 applications: Industrial Automation Controllers, USB Peripherals and HID Devices, Automotive Body and HMI Modules, Medical Monitoring Devices, IoT Sensor Fusion Nodes, Motor Control Front-End.
Industrial Automation Controllers
The PIC32MX340F128HT-80V/MR fits industrial automation controllers because its 80MHz MIPS32 M4K core delivers 124 DMIPS, sufficient for real-time PLC scan loops, Modbus RTU/TCP protocol stacks, and PID control algorithms. The 128KB Flash accommodates complete ladder-logic runtimes and fieldbus libraries while the 32KB SRAM holds communication buffers and process variables without external memory expansion. The 10-bit ADC with up to 16 channels directly digitizes 4-20mA sensor inputs via external signal conditioning, and the integrated DMA controller offloads high-speed data movement from the CPU. The -40C to +105C automotive/extended temperature grade handles cabinet-internal environments where standard 85C parts would derate, and the 64-VQFN (9x9 mm) package keeps board area compact for DIN-rail mounted designs. Engineers benefit from Microchip's MPLAB X IDE, Harmony framework, and free TCP/IP stack for rapid firmware development.
Recommended
USB Peripherals and HID Devices
The PIC32MX340F128HT-80V/MR is ideal for USB peripherals because its integrated USB 2.0 full-speed OTG controller with on-chip transceiver eliminates the need for an external PHY chip. The 80MHz MIPS core handles USB stack execution, HID report generation, and bulk transfer protocols at full 12Mbps with minimal CPU overhead. The 128KB Flash fits Microchip's free USB stack, CDC class drivers, and vendor-specific HID descriptors, while the 32KB SRAM serves as USB endpoint buffer and protocol scratch space. The integrated DMA engine transfers USB packets to/from RAM without CPU intervention, freeing cycles for application logic. The 64-VQFN package and 53 GPIO enable compact dongle designs, while the -40C to +105C operating range suits industrial USB peripherals. Typical use cases include USB-to-UART bridges, HID game controllers, custom HID data acquisition, and USB mass-storage devices.
Recommended
Automotive Body and HMI Modules
The PIC32MX340F128HT-80V/MR suits automotive body and HMI modules because its -40C to +105C 'V' temperature grade withstands cabin and under-hood thermal swings, and its 80MHz MIPS core runs graphic LCD drivers, capacitive touch controllers, and CAN/LIN gateway logic simultaneously. The 128KB Flash stores HMI page tables and button-event firmware, while the 32KB SRAM buffers CAN message objects, LCD framebuffers, and touch-sensor scan data. The 10-bit ADC reads analog climate sensors, lighting feedback, and potentiometer inputs without external converters, while DMA offloads periodic sensor polling. With 53 GPIO, the part directly drives segment LCDs, LED matrices, and rotary encoder inputs without external logic. Engineers use the MPLAB Harmony framework and automotive-grade development tools to achieve ISO 26262-aligned designs. Note that for full AEC-Q100 qualification, check Microchip's automotive-specific part list.
Recommended
Medical Monitoring Devices
The PIC32MX340F128HT-80V/MR fits portable medical monitoring devices because its 80MHz MIPS core delivers deterministic real-time performance for ECG/EEG signal acquisition, SpO2 calculation routines, and Bluetooth/BLE command handling. The 128KB Flash hosts complete firmware stacks including DSP filter routines, alarm algorithms, and USB charging interface logic. The 32KB SRAM is sufficient for sample buffers and BLE event queues. The 10-bit ADC with DMA support captures multiple physiological channels at high sample rates without CPU load, and the -40C to +105C temperature range supports continuous patient-worn operation across varied environments. The 64-VQFN (9x9 mm) package enables compact wearable form factors. For full IEC 60601 medical safety compliance, additional isolation and verification steps are required beyond the MCU selection itself.
Recommended
IoT Sensor Fusion Nodes
The PIC32MX340F128HT-80V/MR fits IoT sensor fusion nodes because its 80MHz MIPS32 core runs sensor-fusion algorithms, wireless-protocol stacks (Zigbee/LoRa command handlers), and edge analytics in parallel without external memory. The 128KB Flash accommodates Over-the-Air (OTA) bootloader, mesh networking libraries, and DSP filter routines for IMU data, while the 32KB SRAM buffers sensor samples between wireless transmissions. The 10-bit ADC with DMA reads temperature, humidity, gas, and motion-sensor analog outputs directly, and the integrated DMA engine moves sensor data without CPU intervention for ultra-low power duty cycling. The 53 GPIO enable direct interface to multiple I2C/SPI/UART sensors, while the -40C to +105C grade supports outdoor and industrial IoT deployments. The 64-VQFN footprint fits compact sensor hub modules.
Recommended
Motor Control Front-End
The PIC32MX340F128HT-80V/MR suits motor-control front-end applications because its 80MHz MIPS32 M4K core executes field-oriented control (FOC) algorithms and PWM generation with deterministic timing. The 128KB Flash holds complete motor-control firmware including sinusoidal commutation tables, encoder feedback handling, and protection routines, while the 32KB SRAM serves as PWM duty-cycle buffer and current-loop sample storage. The 10-bit ADC with DMA samples phase currents and DC-bus voltage at high rates without CPU intervention, leaving cycles for the FOC math. The 53 GPIO provide direct interface to gate-driver enable lines, Hall sensors, and quadrature encoders, and the -40C to +105C operating range supports industrial drives and appliance motor control. The 64-VQFN package with exposed pad efficiently dissipates heat in compact inverter designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX340F128HT-80V/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX340F128H-80V/MR | PIC32MX340F128HT-80I/MR | PIC32MX340F128HT-80V/PT | PIC32MX330F128HT-V/MR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Temperature Grade | V (-40C to +105C) | V (-40C to +105C) | I (-40C to +85C) | V (-40C to +105C) | V (-40C to +105C) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Higher temperature grade for harsh environments (vs PIC32MX340F128HT-80I/MR)
- USB 2.0 full-speed OTG with on-chip transceiver (vs PIC32MX320F128HT-80V/MR)
- More Flash than PIC32MX330 sub-family (vs PIC32MX330F128HT-V/MR)
Design Notes
The 64-VQFN (9x9 mm) package uses an exposed thermal pad (EP, pin 64) that MUST be soldered to a PCB ground plane for proper heat dissipation. Recommended PCB layout: thermal pad area of at least 6x6 mm with 0.5 mm pitch via array (thermal vias, 0.3 mm drill, 1 oz copper plating) connecting to inner ground plane. Without proper thermal pad soldering, junction temperature may rise above rated limits at high ambient temperatures, especially under automotive -40C to +105C operating range. Estimated: at typical 80MHz operation with 70mA core current and 3.3V supply, power dissipation is approximately 230 mW; thermal resistance theta_JA of ~28 C/W yields junction-to-ambient rise of 6.4 C above ambient - manageable for industrial and automotive grades.
Decoupling: place 0.1 uF ceramic capacitors as close as possible to each VDD pin (pins 12, 30 of the 64-VQFN package) and a bulk 10 uF tantalum or ceramic capacitor near the MCU power entry. USB-specific: the VUSB pin (pin 63) requires a 0.47 uF decoupling capacitor for the internal USB transceiver regulator. Crystal oscillator traces should be kept short (<10 mm) and surrounded by ground pour; use a 4-layer PCB with dedicated ground plane for best EMI performance. Programming/debug header (PGEC1/PGED1, pins 14-15) should be brought out to a 0.1 inch header or test pad for MPLAB ICD access.
Do not confuse the PIC32MX340 with PIC32MX320 (no USB) or PIC32MX360 (with CAN) - verify peripheral set in the ordering code. The 'V' (automotive) vs 'I' (industrial) temperature suffix is critical for applications near +85C to +105C - using 'I' grade above 85C violates datasheet specifications. The 10-bit ADC reference voltage setup (VREF+/VREF-) requires external capacitors and careful PCB routing; avoid using VDD as ADC reference for noise-sensitive measurements. For USB applications, ensure the VUSB pin decoupling is correct, or USB enumeration may fail intermittently.
Compliance Information
RoHS compliant per Microchip product page. The 'V' temperature grade is designed for automotive environments but is NOT explicitly AEC-Q100 qualified as a single part - check Microchip's automotive-grade product list for full AEC-Q100 certification. Lead-free and halogen-free per Microchip environmental compliance documentation.
