PIC32MX340F128L-80V/PT - 80MHz 32-bit MCU, 128KB Flash | Microchip
MPN: PIC32MX340F128L-80V/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.4 | $640.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.9 | $4,900.00 |
PIC32MX340F128L-80V/PT Overview
A 32-bit microcontroller (MCU) is an integrated circuit containing a 32-bit CPU core, on-chip program and data memory, and programmable peripherals, executing instructions from a Harvard-architecture core where program and data buses are separated. 32-bit MCUs sit at the top of the MCU taxonomy: MCU > 32-bit MCU > MIPS/ARM/Cortex > RISC > embedded processor, and they deliver higher code density, faster arithmetic, and more deterministic interrupt latency than 8-bit or 16-bit MCUs. The PIC32 family extends Microchip's legacy PIC instruction set into 32-bit performance while preserving the MPLAB development ecosystem.
The PIC32MX340F128L-80V/PT integrates a single-cycle 32x32 hardware multiply/divide unit, supports MIPS16e code compression for up to 40% smaller code size, and provides a 5-stage pipeline that can sustain 105 DMIPS at 80 MHz. On-chip DMA channels offload peripheral transactions from the CPU, and the peripheral pin select (PPS) system remaps digital functions to user-selected I/O pins, simplifying PCB routing. A 16-bit timer/capture/PWM module and an RTCC (Real-Time Clock Calendar) support motor control and timekeeping without external components.
Typical applications include USB peripherals (HID, CDC, MSD class devices), industrial control panels, motor control boards, human-machine interfaces (HMIs) with color TFT displays, point-of-sale terminals, and consumer audio products. The 53 I/O pins and 100-pin package make it well suited to mid-complexity designs that exceed the I/O budget of smaller PIC32 parts, while the 128 KB Flash accommodates full USB stacks and graphical user interface libraries.
When designing with this MCU, allocate the high-frequency oscillator pins (OSC1/OSC2) close to the IC with a guard ring, keep the Vcap/Vddcore power trace short, and follow the PIC32MX3XX/4XX Family Silicon Errata sheet for any device revision-specific behaviors. Use MPLAB Harmony or MPLAB XC32 to maximize code density via MIPS16e, and validate USB signal integrity with the on-chip 48 MHz PLL configured per the USB clock tree requirements in the datasheet.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet, giving component engineers a faster path to BOM decision and a clear upgrade path within the PIC32MX3/4 family.
Drop-in alternatives for PIC32MX340F128L-80V/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 PIC32MX340F128L-80V/PT (same form factor and footprint) — differing in ADC, Package, Operating Temperature, DMA Channels, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX340F128LT-80V/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC32MX340F128L-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F128H-80V/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX330F128L-80V/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX320F128L-80V/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.45 / Unit
View Datasheet →PIC32MX270F512L-V/PT
✅ Drop-In✓ In Stock
$6.48 / Unit
View Datasheet →PIC32MX340F128L-80V/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 80 MHz |
| Performance | 105 DMIPS |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Number of I/O Pins | 53 |
| ADC | 10-bit, 16-channel, 1 Msps |
| USB | USB 2.0 Full-Speed OTG |
| DMA Channels | 4 |
| Timers | 5 x 16-bit |
| Communication Peripherals | SPI, I2C, UART, PMP |
| Package | 100-pin TQFP (12x12 mm) |
| Operating Temperature Range (V) | -40C to +105C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC32MX340F128L-80V/PT 100-pin tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for PIC32MX340F128L-80V/PT (100-pin tqfp (12x12 mm) 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 PIC32MX340F128L-80V/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC32MX340F128L-80V/PT is suitable for 7 applications: USB Human Interface Devices (HID), Industrial HMI / Control Panels, Motor Control and BLDC Drives, Point-of-Sale (POS) Terminals, Consumer Audio and Digital Effects, Medical Monitoring (Non-Critical), IoT Sensor Hubs with USB Configuration.
USB Human Interface Devices (HID)
The PIC32MX340F128L-80V/PT is a strong fit for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices because the integrated USB 2.0 full-speed OTG controller (12 Mbps) eliminates the need for an external PHY, and the 80 MHz MIPS M4K core runs HID class drivers with sub-millisecond polling latency. The 128 KB Flash holds the USB stack plus vendor-specific report descriptors, while 32 KB SRAM buffers incoming/outgoing reports without CPU intervention thanks to four DMA channels. Typical designs pair it with a 12 MHz crystal that the on-chip PLL multiplies to 48 MHz for the USB clock domain per the datasheet clock tree. Compared to a discrete USB solution, this part reduces BOM cost and PCB area while staying within USB IF compliance.
Recommended
Industrial HMI / Control Panels
For industrial HMI panels with character or TFT LCDs, the PIC32MX340F128L-80V/PT delivers 53 digital I/O, a 16-bit Parallel Master Port (PMP) for direct connection to graphics controllers, and 32 KB SRAM to double-buffer frame updates. The -40C to +105C V-temp grade (the "-80V" designation) tolerates cabinet environments above 85C without active cooling, while the 80 MHz core refreshes a 320x240 QVGA panel at 30+ fps via PMP DMA. The 10-bit ADC reads up to 16 analog inputs for keypad scanning, temperature sensing, or 4-20 mA loopbacks. Designers can port code via MPLAB Harmony from evaluation boards, shortening time to production for industrial control panels.
Recommended
Motor Control and BLDC Drives
The PIC32MX340F128L-80V/PT fits BLDC, PMSM, and stepper motor control because of its 80 MHz deterministic interrupt latency, five 16-bit timers for PWM generation, and a 10-bit ADC with 1 Msps sampling that closes the current/torque loop in under 10 us per cycle. DMA offloads encoder quadrature decoding from the CPU, freeing cycles for the field-oriented control math. The 53 I/O lines support multi-axis drives by handling Hall sensors, fault inputs, and gate-driver signals on a single chip. Designers benefit from Microchip's MPLAB X IDE motorBench code generation tools that target this exact part.
Recommended
Point-of-Sale (POS) Terminals
POS terminals benefit from the PIC32MX340F128L-80V/PT's USB OTG for host-mode barcode scanners and device-mode receipt printer connections, plus enough Flash (128 KB) for transaction-log buffering and lightweight TLS. The 16-bit PMP drives a small TFT for keypad/touch UI rendering, and the I2C/SPI peripherals link to contactless card readers (NFC front-ends) and EEPROM for tamper-resistant storage. At 80 MHz with 105 DMIPS, the part runs the application state machine alongside encrypted PIN entry with predictable timing, helping designers meet PCI PTS 5.x latency budgets.
Recommended
Consumer Audio and Digital Effects
Audio accessories such as digital mixers, guitar pedals, and USB audio interfaces leverage the PIC32MX340F128L-80V/PT's I2S/SSI interface, 80 MHz throughput for software DSP effects, and USB 2.0 FS for streaming 24-bit/48 kHz stereo to a host PC. The 32 KB SRAM is large enough for circular delay-line and reverb buffers at 48 kHz, while DMA feeds the codec without CPU stalls. The 53 I/O count supports multi-knob user interfaces, footswitches, and LED level metering. Compared to dedicated audio DSPs, this MCU eliminates the second chip while preserving enough MIPS for shallow audio processing tasks.
Recommended
Medical Monitoring (Non-Critical)
For non-life-critical medical monitoring such as fitness wearables, blood-pressure cuffs, and pulse oximeter front-ends, the PIC32MX340F128L-80V/PT provides the I/O density, ADC, and USB connectivity required by Class II medical devices. The 80 MHz core runs the SpO2 algorithm in real time while DMA feeds the photodiode ADC samples. The V-temp -40C to +105C grade covers home-health environments. Designers should still validate IEC 60601-1 EMC/ESD margins externally; the MCU itself provides only the compute platform. The wide Flash and RAM support BLE companion-chip command stacks via UART.
Recommended
IoT Sensor Hubs with USB Configuration
IoT sensor hubs that require a USB configuration port benefit from the PIC32MX340F128L-80V/PT because the integrated USB 2.0 FS device port allows a host PC to push firmware updates and read telemetry without external bridges. The 53 I/O pins aggregate UART/I2C/SPI sensor buses, and the 80 MHz core runs JSON parsing and TLS handshake fragments locally. The 128 KB Flash is sufficient for application code plus a small MQTT client, while 32 KB RAM buffers several seconds of sensor stream before Wi-Fi transmit. Designers can prototype on the Explorer 16/32 board and migrate to a custom TQFP-100 PCB without changing pin assignments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX340F128L-80V/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX340F128LT-80V/PT | PIC32MX340F128L-80I/PT | PIC32MX340F128H-80V/PT | PIC32MX270F512L-V/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-100 (12x12 mm) | TQFP-100 (12x12 mm) - same | TQFP-100 (12x12 mm) - same | TQFP-100 (12x12 mm) - same | TQFP-100 (12x12 mm) - same |
| Core | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit |
| Max CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz |
| Flash Program Memory | 128 KB | 128 KB | 128 KB | 256 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 128 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Operating Temperature | -40C to +105C (V-temp) | -40C to +105C (V-temp) | -40C to +85C (I-temp) | -40C to +105C (V-temp) | -40C to +105C (V-temp) |
Key Differentiators
- USB 2.0 OTG with integrated transceiver (vs PIC32MX320F128L-80V/PT)
- Higher 80 MHz speed grade with V-temp range (vs PIC32MX270F512L-V/PT)
- Cost-optimized Flash tier (vs PIC32MX340F128H-80V/PT)
Design Notes
Estimated: at 80 MHz the PIC32MX340F128L-80V/PT requires careful PCB layout for the high-speed USB signals. Route D+/D- as a 90-ohm differential pair, keep them matched within 150 mil, place the 27-ohm series resistors within 4 mm of the IC pins, and add a guard ground around the pair. Decouple each VDD/VSS pair with a 100 nF ceramic plus 4.7 uF bulk capacitor placed within 5 mm of the package; place the 10 uF Vcap on the dedicated VCAP pin with a short trace (per Section 2 of the datasheet).
The PIC32MX340F128L-80V/PT runs from a single 2.3 V to 3.6 V supply; the V-temp grade does not change this voltage window. The internal 1.8 V LDO needs the dedicated VCAP pin stabilized with a low-ESR 10 uF ceramic (X7R, 6.3 V rating). Avoid sharing VCAP with any digital trace. Brown-out reset (BOR) and POR should be enabled in the configuration bits; supply ramp time must be slower than 50 ms or the BOR may not assert properly on first power-up.
Estimated: at full 80 MHz CPU clock with all peripherals active, the PIC32MX340F128L-80V/PT draws roughly 60-80 mA from VDD. In the TQFP-100 package with theta_JA around 45 C/W on a 4-layer JEDEC test board, this raises junction temperature by 3-4 C above ambient, well within the 125 C maximum. For continuous 105 C ambient operation in sealed enclosures, derate CPU activity or consider the smaller TQFP-64 variant where thermal stress concentrates.
Three pitfalls recur on PIC32MX340 designs: (1) forgetting the JTAG TMS/TCK pull-ups disables ICSP debug; (2) programming config bits with the wrong PLL setting before the USB 48 MHz clock is stable causes the USB module to enumerate unreliably; (3) using a 3.3 V LDO without 100 mA headroom for in-rush on the USB bus-attached devices causes brown-out. Always consult the PIC32MX3XX/4XX Family Silicon Errata (DS80000530) for the latest revision-specific anomalies.
The 16-bit Parallel Master Port (PMP) can toggle at high rates when driving a TFT; place series 33-ohm resistors on each PMP data line within 10 mm of the IC to dampen reflections on cables or long board traces. For QSPI memories running at 80 MHz, add a 22-ohm source-series termination. Use Microchip's MPLAB Harmony configuration tool to set the PMP timing parameters; do not rely on default timing.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this part is for industrial and consumer applications, not automotive.
