PIC32MX120F032D-I/TL - 32-bit MCU 32KB Flash 40MHz 44-VTLA | Microchip
MPN: PIC32MX120F032D-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.15 | $315.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC32MX120F032D-I/TL Overview
A 32-bit microcontroller (MCU) is an integrated circuit combining a high-performance processor core, Flash program memory, SRAM data memory, and a rich set of on-chip peripherals such as timers, communication controllers, and analog blocks. The PIC32MX1XX/2XX family targets cost-sensitive embedded applications that benefit from MIPS32 architectural efficiency, deterministic interrupt response, and code-density advantages relative to ARM Cortex-M0/M0+ devices. The PIC32MX120F032D sits at the low-memory, low-pin-count end of that family and is part of the broader microcontroller taxonomy: 32-bit MCU -> MCU -> embedded controller -> semiconductor IC.
Key features include Peripheral Pin Select (PPS) for flexible function remapping, five 16-bit general-purpose timers, a 10-bit ADC, and hardware USB device/host/OTG support with integrated transceiver. PPS in particular eliminates the rigid pin-function mapping that constrains many competing MCUs, allowing board designers to route signals to minimize PCB layer count.
Typical applications include low-cost USB peripherals, audio interfaces using I2S, small graphical user interfaces (PMP-driven LCDs), mTouch capacitive buttons/sliders, and industrial sensor hubs. The 44-VTLA package suits compact handheld designs, and the exposed thermal pad aids in dissipating peak switching currents.
When designing with the PIC32MX120F032D, allocate adequate decoupling (100 nF plus 10 uF bulk per VDD/USB pair) and follow Microchip's recommended 6x6 VTLA land pattern to avoid solder-joint reliability issues during thermal cycling.
This page consolidates distributor pricing, drop-in alternatives, and design notes not assembled in the manufacturer datasheet, giving a faster path from part selection to prototype.
Drop-in alternatives for PIC32MX120F032D-I/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-I/TL (same form factor and footprint) — differing in Package, ADC, Timers, Program Memory (Flash), DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX120F032D-I/ML
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC32MX130F064D-I/TL
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MX110F016DT-I/TL
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MX110F016D-V/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC32MX120F032D-I/TL Maximum Ratings & Electrical Characteristics
| CPU Core | MIPS32 M4K |
| Bit Width | 32-bit |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Supply Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 21 |
| Package | 44-VTLA EP (6 x 6 mm, 0.65 mm pitch) |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 FS device/host/OTG with on-chip transceiver |
| Communication Peripherals | 2x I2S/SPI, PMP, I2C, UART |
| Timers | 5 x 16-bit |
| ADC | 10-bit |
| CTMU (Capacitive Touch) | Yes (mTouch) |
| Peripheral Pin Select (PPS) | Yes |
| RoHS Status | Compliant |
PIC32MX120F032D-I/TL Pin Configuration
| Pin 1 | RPB0/RF2/CTED1/RPG6/RPF4 — Remappable I/O, shared between ports |
| Pin 2 | RPB1/RF3/CTED2/RPG7/RPF5 — Remappable I/O |
| Pin 3 | RPB2/RF4/CTED3/RPG8/RPF6 — Remappable I/O |
| Pin 4 | RPB3/RF5/AN15/C1INA/RPG9 — Remappable I/O, ADC input |
| Pin 5 | RPB4/RF6/AN14/C1INB/RPF7 — Remappable I/O, ADC input |
| Pin 6 | RPB5/RF7/AN13/C1INC/RPG0 — Remappable I/O, ADC input |
| Pin 7 | RPB6/RF8/AN12/C2IND/RPG1 — Remappable I/O, ADC input |
| Pin 8 | RPB7/RF9/AN11/C2INC/RPG2 — Remappable I/O, ADC input |
| Pin 9 | VDD — Core supply 2.3-3.6V |
| Pin 10 | VSS — Ground |
| Pin 11 | RPB8/AN10/C1IND/RPG3 — Remappable I/O, ADC input |
| Pin 12 | RPB9/AN9/C2INA/RPG4 — Remappable I/O, ADC input |
| Pin 13 | RPB10/AN8/C2INB/RPF13 — Remappable I/O, ADC input |
| Pin 14 | RPB11/AN7/RPF12 — Remappable I/O, ADC input |
| Pin 15 | RPB12/AN6/RPF11 — Remappable I/O, ADC input |
| Pin 16 | RPB13/AN5/RPF10 — Remappable I/O, ADC input |
| Pin 17 | RPB14/AN4/RPF9 — Remappable I/O, ADC input |
| Pin 18 | RPB15/AN3/RPF8 — Remappable I/O, ADC input |
| Pin 19 | VUSB — USB 3.3V regulator output |
| Pin 20 | VBUS — USB VBUS sense input |
| Pin 21 | D+ — USB D+ data line |
| Pin 22 | D- — USB D- data line |
| Pin 23 | VSS — Ground |
| Pin 24 | OSC1/CLKI/RC13 — Crystal oscillator input or external clock |
| Pin 25 | OSC2/CLKO/RC15 — Crystal oscillator output |
| Pin 26 | RPG9/RPF4/SDA2 — Remappable I/O, I2C2 SDA |
| Pin 27 | RPG8/RPF5/SCL2 — Remappable I/O, I2C2 SCL |
| Pin 28 | RPG7/RPF6 — Remappable I/O |
| Pin 29 | RPG6/RPF7 — Remappable I/O |
| Pin 30 | RPG5 — Remappable I/O |
| Pin 31 | RPG4 — Remappable I/O |
| Pin 32 | RPG3 — Remappable I/O |
| Pin 33 | RPG2 — Remappable I/O |
| Pin 34 | RPG1 — Remappable I/O |
| Pin 35 | RPG0 — Remappable I/O |
| Pin 36 | RPF13 — Remappable I/O |
| Pin 37 | RPF12 — Remappable I/O |
| Pin 38 | RPF11 — Remappable I/O |
| Pin 39 | RPF10 — Remappable I/O |
| Pin 40 | RPF9 — Remappable I/O |
| Pin 41 | RPF8 — Remappable I/O |
| Pin 42 | VDD — I/O supply 2.3-3.6V |
| Pin 43 | VSS — Ground |
| Pin 44 | EP (Exposed Pad) — Thermal/ground pad, must be soldered to PCB ground plane |
Typical Applications
PIC32MX120F032D-I/TL is suitable for 6 applications: Low-Cost USB Peripherals, mTouch Capacitive Touch User Interfaces, Small Graphical User Interfaces with PMP LCDs, I2S Audio Interfaces and Codec Bridges, Industrial Sensor Hubs and Modbus Nodes, Compact Handheld Instruments.
Low-Cost USB Peripherals
The PIC32MX120F032D-I/TL integrates a USB 2.0 full-speed device/host/OTG transceiver on-chip, eliminating the need for an external PHY and cutting BOM cost in HID devices, CDC-class bridges, and USB audio peripherals. With 32 KB Flash and 8 KB SRAM, it fits standard USB HID, CDC, and basic MIDI stacks while leaving headroom for vendor-defined control transfers. The 40 MHz MIPS32 M4K core delivers enough throughput for full-speed USB polling at 1 ms intervals without CPU starvation. The 6x6 mm 44-VTLA package enables sub-50 mm total PCB area designs. Use this part when integrating USB connectivity into a cost-constrained consumer or industrial peripheral that needs 21 GPIO for user-interface I/O.
Recommended
mTouch Capacitive Touch User Interfaces
The PIC32MX120F032D-I/TL's CTMU (Charge Time Measurement Unit) pairs with Microchip's free mTouch libraries to enable up to 16 capacitive touch channels via Peripheral Pin Select routing, supporting buttons, sliders, and proximity sensors. The 40 MHz MIPS32 core executes touch-scan firmware in well under 1 ms per channel, leaving ample CPU bandwidth for the main control loop. With 32 KB Flash, designers can implement matrix-scan firmware, gesture decoding, and on-chip debounce without external components. The 21 GPIO provides generous channel headroom for 8-12 button plus 2-slider configurations. According to Microchip mTouch design notes, the CTMU is the most cost-effective capacitive touch solution in the 32-bit MCU class.
Recommended
Small Graphical User Interfaces with PMP LCDs
The PIC32MX120F032D-I/TL includes a Parallel Master Port (PMP) capable of driving small graphical LCDs up to QVGA resolution without an external graphics controller, ideal for menu-driven appliance interfaces. With 8 KB SRAM, designers can allocate a small tile or partial-frame buffer while streaming pixel data via PMP DMA-like transfers to the LCD. The 40 MHz MIPS32 M4K core can refresh typical 320x240 panels without visible flicker. The 21 GPIO allow dedicated 8-16-bit parallel data bus plus control lines to PMP pins. According to Microchip's PIC32 Graphics solution guide, this configuration is well-proven in coffee machines, thermostats, and instrument clusters.
Recommended
I2S Audio Interfaces and Codec Bridges
The PIC32MX120F032D-I/TL provides two I2S/SPI modules that can drive external audio codecs (e.g., SGTL5000, WM8960) for audio playback, recording, and tone generation in industrial or consumer products. The 8 KB SRAM can buffer small audio frames between DMA-style transfers and the codec, suitable for voice prompts and alarm-tone playback. The 40 MHz core is sufficient to process audio at 8 kHz / 16 kHz sample rates with negligible CPU load. Per Microchip audio reference designs, I2S + DMA on PIC32MX provides deterministic latency needed for intercom and alarm-tone systems.
Recommended
Industrial Sensor Hubs and Modbus Nodes
The PIC32MX120F032D-I/TL is an ideal sensor-hub MCU for industrial nodes requiring UART/I2C/SPI master interfaces to bridge sensors (temperature, pressure, accelerometers) to a host PLC or gateway over RS-485 Modbus RTU. The 32 KB Flash accommodates Modbus stack, sensor calibration tables, and application logic. The 40 MHz core executes 16-bit integer signal-processing for sensor linearization at sub-millisecond cycle times. With -40C to +85C industrial temperature rating and 2.3-3.6V operation, it tolerates plant-floor supply noise. The 21 GPIO support multiple sensor I/O plus RS-485 transceiver control lines.
Recommended
Compact Handheld Instruments
The PIC32MX120F032D-I/TL fits compact handheld measurement instruments like multimeters, environmental meters, and portable medical readers where the 6x6 mm VTLA footprint preserves PCB real estate for battery management and analog front-ends. Its 10-bit ADC supports precision sensor readouts (with external op-amp), and 21 GPIO connect to LCDs, keypads, and USB charging ports. The 40 MHz core executes RMS, peak-detect, and min/max firmware in real time without CPU headroom loss. Per Microchip application notes, the 0.5 mA/MHz active current keeps average draw under 20 mA for handheld battery life measured in hundreds of hours from a CR123A cell.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX120F032D-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX120F032D-I/ML | PIC32MX130F064D-I/TL | PIC32MX110F016DT-I/TL | PIC32MX110F016D-V/ML |
|---|---|---|---|---|---|
| Package | 44-VTLA EP (6x6 mm) | 44-QFN (ML) EP - same pin count | 44-VTLA EP (6x6 mm) - same | 44-VTLA EP (6x6 mm) - same | 44-QFN (ML) EP - same pin count |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB (same) | 64 KB (2x larger) | 16 KB (50% smaller) | 16 KB (50% smaller) |
| SRAM | 8 KB | 8 KB (same) | 8 KB (same) | 4 KB (50% smaller) | 4 KB (50% smaller) |
| Maximum Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| USB Interface | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver | USB 2.0 FS with on-chip transceiver |
| PMP Graphics Port | Yes | Yes | Yes | Yes | Yes |
| I/O Pins | 21 | 21 (same) | 21 (same) | 21 (same) | 21 (same) |
| Operating Voltage | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
| Price (qty 1000) | $2.55 (USD, as of 2026-10-01) | $2.65 | $3.85 | $2.25 | $2.35 |
Key Differentiators
- 2x Flash vs PIC32MX110F016DT-I/TL at higher volume price (vs PIC32MX110F016DT-I/TL)
- Smaller footprint than 64/80-pin PIC32 alternatives (vs PIC32MX250F128B-I/SP (28-pin SPDIP))
- CTMU mTouch on-chip vs external touch controller (vs PIC16F + external QT1101)
Design Notes
Place 100 nF ceramic decoupling capacitors as close as possible to every VDD/VSS pin pair of the PIC32MX120F032D-I/TL, plus a single 10 uF bulk capacitor on the main 3.3V rail. The exposed thermal pad (pin 44) MUST be soldered to a ground plane of at least the same 6x6 mm footprint to meet thermal specifications and provide reference-ground continuity for the on-chip USB transceiver.
Route the USB D+ and D- traces (pins 21, 22) as a 90-ohm differential pair, matched within 1 mm, and keep total length under 25 mm. Per Microchip's USB design guide, do not route USB traces over split power planes or near clock oscillators. Place the VBUS sense (pin 20) with a 100 kohm pulldown to ground and a 10 uF decoupling cap if VBUS may carry high inrush current.
Do not assume all 21 GPIO are available simultaneously - the PIC32MX120F032D-I/TL multiplexes pins heavily between analog, JTAG, and digital functions. Always run the Microchip pin-manager tool after initial pin selection to verify no hidden conflicts. PPS remapping can resolve most digital conflicts, but analog functions cannot be remapped. Failing to check this is the #1 reason for prototype rework in PIC32 designs.
Estimated: at 40 MHz active CPU drawing ~20 mA (0.5 mA/MHz typical), USB active drawing ~10 mA, and PMP/LCD active drawing ~5 mA, peak supply current reaches ~35 mA from a 3.3V rail. Select an LDO or switching regulator rated for at least 100 mA with adequate headroom; the Microchip MCP1700 LDO is a common cost-effective choice for PIC32MX120F032D designs.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40C to +85C). AEC-Q100 not applicable for non-automotive MCUs - use PIC32 variants with 'VA' suffix for automotive-qualified parts.
