PIC32MX120F032D-50I/TL - 50MHz MIPS32 32KB Flash MCU | Microchip
MPN: PIC32MX120F032D-50I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.62 | $26.20 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
PIC32MX120F032D-50I/TL Overview
A microcontroller (MCU) is a single-chip processor that integrates CPU core, non-volatile Flash for program storage, SRAM for working data, and a rich set of peripherals (ADCs, timers, communication blocks, I/O). PIC32MX devices belong to the MIPS32-based 32-bit MCU family, sitting above 8-bit PIC16/PIC18 and below the higher-end PIC32MZ in Microchip's portfolio. The 32-bit MIPS M4K core brings hardware multiply/divide, single-cycle 32-bit ALU operations, and a deterministic interrupt model, making it suitable for embedded control loops, USB device stacks, and modest graphics rendering.
Key features of the PIC32MX120F032D include Peripheral Pin Select (PPS) for flexible signal routing, two I2S/SPI modules for audio codecs, a Parallel Master Port (PMP) for graphics interfaces, a Charge Time Measurement Unit (CTMU) for capacitive touch, 13 channels of 10-bit ADC, and full-speed USB 2.0 device support. The Flash controller offers self-programmability, allowing field firmware updates via bootloader or application code.
Typical applications span consumer audio docks, USB HID devices, industrial HMI panels, low-cost graphics terminals, capacitive touch human-machine interfaces, and small appliances. Designers pick this device when 32-bit throughput is needed but a full PIC32MZ is overkill in cost or footprint.
Designers should evaluate MIPS/Watt versus ARM Cortex-M0+ alternatives. The 6x6 mm VTLA package requires careful thermal management only at high active duty cycles; otherwise the part's 0.5 mA/MHz typical active current keeps dissipation low. Note the 50 MHz industrial grade (-50I) is distinct from the 40 MHz industrial variant.
This page consolidates distributor pricing, package-compatible drop-in alternatives, and practical design notes that go beyond the Microchip datasheet family document, helping engineers evaluate lifecycle risk and supply-chain substitutes.
Drop-in alternatives for PIC32MX120F032D-50I/TL — 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 PIC32MX120F032D-50I/TL (same form factor and footprint) — differing in DMA Channels, Package, Program Memory (Flash), ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX120F032C-V/TL
✅ Drop-In✓ In Stock
$2.58 / Unit
View Datasheet →PIC32MX110F016D-I/PT
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →PIC32MX110F016DT-I/TL
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MX110F016DT-V/TL
✅ Drop-In✓ In Stock
$2.07 / Unit
View Datasheet →PIC32MX110F016CT-I/TL
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →PIC32MX120F032D-50I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data SRAM | 8 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Active Current | < 0.5 mA/MHz |
| Operating Temperature | -40C to +105C (Industrial grade -I) |
| Package | 44-VTLA (6x6 mm) |
| Mounting Type | Surface Mount |
| ADC | 13 channels x 10-bit |
| I2S/SPI Modules | 2 |
| USB | Full-Speed USB 2.0 Device |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Charge Time Measurement Unit (CTMU) | Yes (mTouch capacitive touch) |
| RoHS Status | Compliant |
PIC32MX120F032D-50I/TL Pin Configuration
| Pin 1 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 2 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 3 | VDD — Positive supply voltage (2.3 V to 3.6 V) |
| Pin 4 | VSS — Ground reference |
| Pin 5 | OSCI — Primary oscillator input or crystal connection |
| Pin 6 | OSCO — Primary oscillator output |
| Pin 7 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 8 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 9 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 10 | VUSB — USB internal transceiver supply (3.3 V typical) |
| Pin 11 | D+ — USB D+ data line |
| Pin 12 | D- — USB D- data line |
| Pin 13 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 14 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 15 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 16 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 17 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply voltage (2.3 V to 3.6 V) |
| Pin 20 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 21 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 22 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 23 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 24 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 25 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 26 | ANx — Analog input (10-bit ADC) |
| Pin 27 | ANx — Analog input (10-bit ADC) |
| Pin 28 | ANx — Analog input (10-bit ADC) |
| Pin 29 | VREF+ — ADC positive reference voltage |
| Pin 30 | VREF- — ADC negative reference / analog ground |
| Pin 31 | AVDD — Analog supply voltage |
| Pin 32 | AVSS — Analog ground |
| Pin 33 | MCLR — Master clear reset (active-low) |
| Pin 34 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 35 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 36 | PMAx — Parallel Master Port address / data |
| Pin 37 | PMAx — Parallel Master Port address / data |
| Pin 38 | PMD — Parallel Master Port data |
| Pin 39 | PMD — Parallel Master Port data |
| Pin 40 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 41 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 42 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 43 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
| Pin 44 | RPn/GPIO — Remappable peripheral pin / general purpose I/O |
Typical Applications
PIC32MX120F032D-50I/TL is suitable for 6 applications: USB HID Human Interface Devices, Audio Codec Front-End with I2S, Capacitive Touch HMI Panels (mTouch), Low-Cost Graphics HMI Terminals, Industrial Sensor Aggregation Nodes, USB CDC Virtual COM Port Bridges.
USB HID Human Interface Devices
The PIC32MX120F032D-50I/TL is well suited to USB HID designs such as keyboards, mice, game controllers, and custom input peripherals. The integrated full-speed USB 2.0 device controller plus 8 KB SRAM comfortably hosts the USB HID class driver and small report descriptors, while 32 KB Flash holds composite HID stacks. Microchip's MPLAB Harmony framework provides ready-made USB HID examples that compile to under 16 KB Flash. The 50 MHz MIPS32 M4K core executes HID report handling at sub-millisecond latency. PPS routing simplifies PCB layout by remapping USB D+/D- to convenient pins without layout rework.
Recommended
Audio Codec Front-End with I2S
The PIC32MX120F032D-50I/TL drives external audio codecs via its two I2S/SPII modules, suitable for Bluetooth audio docks, USB speakers, and consumer soundbars. DMA-driven I2S transfers leave the MIPS32 M4K core free for audio processing or Bluetooth host-stack glue logic. The 13-channel 10-bit ADC supports auxiliary analog monitoring (battery, jack detect). At 50 MHz, sample rates up to 48 kHz are achievable with headroom for FIR filters. Designers pair it with codecs such as the Microchip MCP4921 or AK5720.
Recommended
Capacitive Touch HMI Panels (mTouch)
The PIC32MX120F032D-50I/TL's integrated Charge Time Measurement Unit (CTMU) enables Microchip's mTouch capacitive touch sensing for buttons, sliders, and proximity sensors. Industrial HMI front panels, appliance controls, and IoT smart switches benefit from 13 ADC channels shared with CTMU for multi-button matrices. The 32 KB Flash holds complete mTouch firmware plus application logic; 8 KB RAM is sufficient for state machines and debounce buffers. PPS remaps touch I/O for flexible PCB layout.
Recommended
Low-Cost Graphics HMI Terminals
The PIC32MX120F032D-50I/TL drives small TFT or OLED graphical displays through its Parallel Master Port (PMP), targeting low-cost graphics HMI on appliances, instrument front panels, and Point-of-Sale terminals. PMP supports 8/16-bit parallel data with programmable timing, connecting to common display controllers like SSD1963, ILI9341, or ST7565R. At 50 MHz, framebuffer updates are smooth for menus up to 320x240. Microchip's Microchip Graphics Library provides primitives for icons, text, and progress bars.
Recommended
Industrial Sensor Aggregation Nodes
The PIC32MX120F032D-50I/TL aggregates analog sensor data via its 13-channel 10-bit ADC, processes with the MIPS32 M4K core, and forwards via UART/SPI/I2C to industrial backplanes. Typical use cases include multi-channel thermocouple scanners, 4-20 mA loop readers, and PLC I/O expanders. The -40C to +105C industrial temperature grade suits factory environments, while sub-0.5 mA/MHz active current supports solar or battery-powered remote sensors.
Recommended
USB CDC Virtual COM Port Bridges
The PIC32MX120F032D-50I/TL serves as a USB-to-UART bridge using the integrated full-speed USB device plus DMA-driven UART, ideal for replacing legacy RS-232 ports with USB CDC class devices. Engineers use it for debug consoles, firmware-loader dongles, and industrial programming tools. The 8 KB SRAM is sufficient for small USB CDC ACM stacks, while 32 KB Flash allows bundled bootloader and application code. PPS remapping simplifies board routing when USB and UART pins are far apart.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX120F032D-50I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX120F032C-V/TL | PIC32MX110F016D-I/PT | PIC32MX110F016DT-I/TL | PIC32MX110F016DT-V/TL | PIC32MX110F016CT-I/TL |
|---|---|---|---|---|---|---|
| Package | 44-VTLA (6x6 mm) | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) | 16 KB (-50%) | 16 KB (-50%) |
| SRAM | 8 KB | 8 KB | 4 KB (-50%) | 4 KB (-50%) | 4 KB (-50%) | 4 KB (-50%) |
| Maximum CPU Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Core Architecture | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Operating Temperature | -40C to +105C (Industrial -50I) | -40C to +105C (V temp grade) | -40C to +105C (Industrial -I) | -40C to +105C (Industrial -I) | -40C to +105C (V temp grade) | -40C to +105C (Industrial -I) |
| USB | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device |
Key Differentiators
- Peripheral Pin Select (PPS) flexibility (vs PIC32MX110F016D-I/PT)
- CTMU capacitive touch subsystem (vs PIC32MX110F016CT-I/TL)
- 32 KB Flash over 16 KB variant (vs PIC32MX110F016DT-I/TL)
Design Notes
Decouple VDD with a 10 uF bulk capacitor plus a 0.1 uF ceramic placed within 5 mm of the package. For USB applications, VUSB requires its own 0.1 uF decoupling near pin 10. AVDD (pin 31) should be tied to VDD or filtered through a ferrite bead for ADC noise reduction; add 10 uF + 0.1 uF on AVDD when the ADC is active. Avoid switching the DC-DC converter's high-di/dt node near VDD traces.
Route USB D+ and D- as a 90-ohm differential pair with continuous ground reference, keeping trace length under 50 mm. The VTLA package has an exposed thermal pad that should be soldered to a copper pour for mechanical strength even though this MCU dissipates little power. Keep the 50 MHz oscillator crystal traces short and symmetric, with a ground guard ring around the crystal pins.
Do not confuse the /TL package (44-VTLA) with /PT (44-TQFP), /ML (44-QFN), or /SO (44-SOIC) - they share the same die but require different PCB footprints. The MCLR pin (pin 33) requires a 10 kohm pull-up to VDD; leaving it floating prevents code execution. PPS input mapping must be unlocked before configuration - use the CFGCON unlock pattern or pins default to GPIO.
Estimated: at 50 MHz full-load active current of 0.5 mA/MHz = 25 mA on a 3.3 V supply yields ~82 mW dissipation. The 44-VTLA theta_JA is approximately 35 C/W (per Microchip package datasheet), giving a 2.9C junction rise above ambient. Even at +105C ambient, the die remains well below the +125C max junction. No external heatsink is required for typical MCU duty cycles.
Compliance Information
Industrial temperature grade -40C to +105C. Not AEC-Q100 qualified - choose PIC32MX1XX automotive variants (Q-suffix) for automotive applications. RoHS compliant per Microchip product page.
