PIC32MX220F032DT-I/ML - 32-bit MCU, 32KB Flash, 40MHz, 44-QFN | Microchip
MPN: PIC32MX220F032DT-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.18 | $3.18 |
| 10 | $2.86 | $28.60 |
| 100 | $2.55 | $255.00 |
| 500 | $2.29 | $1,145.00 |
| 1,000 | $2.03 | $2,030.00 |
PIC32MX220F032DT-I/ML Overview
What is a 32-bit microcontroller? A 32-bit microcontroller (MCU) is an integrated circuit that combines a CPU, memory, and peripherals on a single die. Within the broader taxonomy, the PIC32MX220F032DT belongs to the microcontroller family, which sits under microcontrollers and processors and the broader semiconductor IC category. Unlike 8-bit MCUs, 32-bit cores like MIPS M4K can address more memory, execute instructions in fewer cycles, and handle richer peripherals including USB, I2S, and graphics PMP interfaces.
Key features include Peripheral Pin Select (PPS) for flexible signal routing, a Parallel Master Port (PMP) for graphics interfaces, two I2S/SPI modules for codec and serial communications, two UART and I2C modules, and up to four hardware DMA channels with automatic data size detection. The Charge Time Measurement Unit (CTMU) enables mTouch capacitive touch buttons and sliders, and separate PLLs for CPU and USB clocks simplify mixed-clock designs.
Architecturally, the PIC32MX220F032DT uses a Harvard cache architecture with separate 16KB instruction and data caches, a 5-stage pipeline, and a single-cycle 32x32 hardware multiply plus zero-wait-state Flash access. The I/O count of 34 pins (28 general-purpose plus dedicated peripherals), 5x 16-bit timers, 5 capture inputs, and 5 compare/PWM outputs make it a general-purpose workhorse. Industrial-grade temperature range of -40C to +105C is supported.
Typical applications include low-cost USB peripherals, capacitive touch user interfaces, audio codec front-ends using I2S, low-cost graphics panels driven by PMP, sensor hubs, and battery-powered IoT nodes. The wide 2.3-3.6V operating range and low active current simplify designs running directly from a single Li-ion cell or 3.3V regulated rail.
When designing with this MCU, allocate the VDD/VSS pair carefully: this 44-QFN variant requires at least two VDD pins and a thermal pad tied to ground for proper heat and EMI performance. Verify the in-circuit serial programming pins (PGECx/PGEDx) are accessible for field updates, and confirm DMA channel priorities match your real-time data flow.
This page synthesizes verified distributor pricing, same-brand drop-in PIC32MX alternatives, and practical design considerations not collated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX220F032DT-I/ML — 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 PIC32MX220F032DT-I/ML (same form factor and footprint) — differing in Package, ADC, Timers, Core Architecture, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032D-I/ML
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC32MX220F032DT-50I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032DT-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX120F032DT-I/ML
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC32MX130F256DT-I/ML
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC32MX220F032DT-I/ML Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 40 MHz (industrial grade); 50 MHz/83 DMIPS at -50 speed |
| Program Flash | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Active Current | <0.5 mA/MHz |
| I/O Pins | 34 (general purpose + peripheral) |
| Timers | 5 x 16-bit |
| Capture / Compare / PWM | 5 / 5 |
| UART | 2 |
| I2C | 2 |
| SPI / I2S | 2 modules |
| DMA Channels | Up to 4 with auto data-size detection |
| Parallel Master Port (PMP) | Yes (for graphics) |
| Peripheral Pin Select (PPS) | Yes |
| CTMU (mTouch capacitive touch) | Yes |
| PLLs | Separate PLLs for CPU and USB |
| Operating Temperature | -40C to +105C (industrial) |
| Package | 44-pin QFN (8x8 mm) with exposed thermal pad |
| RoHS Status | Compliant |
PIC32MX220F032DT-I/ML Pin Configuration
| Pin 1 | RP15/PMA0/PMD0/RF0 — Remappable I/O / PMP data |
| Pin 2 | RP14/PMA1/PMD1/RF1 — Remappable I/O / PMP data |
| Pin 3 | RP13/PMD2/RF2 — Remappable I/O / PMP data |
| Pin 4 | RP12/PMD3/RF3 — Remappable I/O / PMP data |
| Pin 5 | RP11/PMD4/RF4 — Remappable I/O / PMP data |
| Pin 6 | RP10/PMD5/RF5 — Remappable I/O / PMP data |
| Pin 7 | RP9/PMD6/RF6 — Remappable I/O / PMP data |
| Pin 8 | RP8/PMD7/RF7 — Remappable I/O / PMP data |
| Pin 9 | RP7/PMD8/RG6 — Remappable I/O / PMP data |
| Pin 10 | RP6/PMD9/RG7 — Remappable I/O / PMP data |
| Pin 11 | RP5/PMD10/RG8 — Remappable I/O / PMP data |
| Pin 12 | RP4/PMD11/RG9 — Remappable I/O / PMP data |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply 2.3-3.6V |
| Pin 15 | RA0 — General purpose I/O / analog |
| Pin 16 | RA1 — General purpose I/O / analog |
| Pin 17 | RA2 — General purpose I/O / analog |
| Pin 18 | RA3 — General purpose I/O / analog |
| Pin 19 | RA4 — General purpose I/O / analog |
| Pin 20 | RA5 — General purpose I/O / analog |
| Pin 21 | RA6 — General purpose I/O / analog |
| Pin 22 | RA7 — General purpose I/O / analog |
| Pin 23 | VSS — Ground reference |
| Pin 24 | VDD — Positive supply 2.3-3.6V |
| Pin 25 | RB0 — General purpose I/O / PGED1 |
| Pin 26 | RB1 — General purpose I/O / PGEC1 |
| Pin 27 | RB2 — General purpose I/O |
| Pin 28 | RB3 — General purpose I/O |
| Pin 29 | RB4 — General purpose I/O |
| Pin 30 | RB5 — General purpose I/O |
| Pin 31 | RB6 — General purpose I/O |
| Pin 32 | RB7 — General purpose I/O |
| Pin 33 | RB8 — General purpose I/O |
| Pin 34 | RB9 — General purpose I/O |
| Pin 35 | RB10 — General purpose I/O |
| Pin 36 | RB11 — General purpose I/O |
| Pin 37 | RB12 — General purpose I/O |
| Pin 38 | RB13 — General purpose I/O |
| Pin 39 | RB14 — General purpose I/O |
| Pin 40 | RB15 — General purpose I/O |
| Pin 41 | D+ — USB D+ data line |
| Pin 42 | D- — USB D- data line |
| Pin 43 | VDD — Positive supply 2.3-3.6V |
| Pin 44 | VSS — Ground reference |
Typical Applications
PIC32MX220F032DT-I/ML is suitable for 6 applications: Low-Cost USB Peripherals, Capacitive Touch User Interfaces, Audio Codec Front-Ends (I2S), Low-Cost Graphics Panels (PMP), Battery-Powered IoT Sensor Hubs, Industrial Control Modules.
Low-Cost USB Peripherals
The PIC32MX220F032DT-I/ML's integrated USB 2.0 full-speed device peripheral and dedicated USB PLL make it well suited for low-cost HID, CDC, and custom-USB peripherals. The 40 MHz MIPS M4K core executes USB stacks with margin, while 8 KB SRAM handles typical class driver state plus small buffers. Combined with 32 KB Flash, the device runs Microchip's MPLAB Harmony USB framework without external parts, supporting 5V-tolerant USB bus designs through proper protection diodes.
Recommended
Capacitive Touch User Interfaces
With on-chip CTMU supporting mTouch capacitive buttons and sliders, the PIC32MX220F032DT-I/ML enables compact touch interfaces for appliances, thermostats, and consumer electronics. The 34 I/O pins support generous touch electrode arrays, while PPS allows flexible ADC pin assignment. The 2.3-3.6V supply simplifies integration with single-cell Li-ion powered wearables, and 8 KB SRAM comfortably stores touch firmware plus filtering state.
Recommended
Audio Codec Front-Ends (I2S)
Two I2S/SPI modules on the PIC32MX220F032DT-I/ML drive external audio codecs for headsets, intercoms, and simple voice capture. The hardware DMA with auto data-size detection offloads I2S sample movement, freeing the 40 MHz MIPS core for audio processing. With 8 KB SRAM, designers can implement small echo-cancel or noise-suppression blocks without external memory, while 32 KB Flash holds audio firmware plus bootloaders.
Recommended
Low-Cost Graphics Panels (PMP)
The Parallel Master Port (PMP) on the PIC32MX220F032DT-I/ML drives small parallel-TFT or character LCD panels for industrial HMIs and appliance displays. The 8/16-bit data interface plus dedicated control lines simplify PCB routing, and PPS allows the data bus to land on convenient I/O clusters. Industrial -40C to +105C operation supports outdoor and factory-floor environments.
Recommended
Battery-Powered IoT Sensor Hubs
Drawing less than 0.5 mA/MHz active and with deep-sleep current down to microamp range, the PIC32MX220F032DT-I/ML fits battery-powered sensor hubs aggregating UART, I2C, and SPI sensor data. The 2.3-3.6V input lets it run directly from a single Li-ion or 2x AA cells via a small buck regulator. CTMU can even wake on capacitive proximity changes, enabling ultra-low-duty-cycle designs with multi-year battery life.
Recommended
Industrial Control Modules
Industrial -40C to +105C rating, robust UART/I2C peripherals, and PMP/PPS make the PIC32MX220F032DT-I/ML a strong fit for industrial control sub-modules and PLC companions. The 34 I/O pins accommodate multiple communication ports, status LEDs, and keypad inputs simultaneously. The 32 KB Flash holds small control loops plus Modbus or CAN-style stack frames, and the wide 2.3-3.6V supply tolerates 24V-bus-derived rails after regulation.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032DT-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032D-I/ML | PIC32MX220F032DT-50I/ML | PIC32MX220F032DT-I/PT | PIC32MX120F032DT-I/ML | PIC32MX130F256DT-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-TQFP (10x10 mm) - same silicon, larger footprint | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Program Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB |
| Maximum CPU Clock | 40 MHz | 40 MHz | 50 MHz | 40 MHz | 40 MHz | 40 MHz |
| USB Peripheral | Yes (FS device) | Yes (FS device) | Yes (FS device) | Yes (FS device) | No | Yes (FS device) |
| CTMU (mTouch) | Yes | Yes | Yes | Yes | No | Yes |
| Supply Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
Key Differentiators
- On-chip USB 2.0 full-speed peripheral with dedicated PLL (vs PIC32MX120F032DT-I/ML)
- Integrated CTMU for mTouch capacitive touch (vs PIC32MX130F256DT-I/ML)
- Compact 44-QFN 8x8 mm footprint with full peripheral set (vs PIC32MX220F032DT-I/PT (TQFP))
Design Notes
The 44-QFN exposed thermal pad MUST be soldered to a PCB ground plane of at least 25x25 mm with multiple thermal vias (typically 0.3 mm drill, 0.6 mm pitch grid). This pad carries most of the package's heat dissipation path and serves as the electrical ground reference for I/O. Skipping via stitching causes junction temperature rise above rated limits at full peripheral load.
Place 100 nF decoupling capacitors on each VDD/VSS pair as close as physically possible to the package pins (within 2-3 mm). Add a bulk 4.7-10 uF tantalum or ceramic near the supply entry point. Decoupling the USB VBUS separately avoids noise coupling during USB bus events. Estimated power at 40 MHz with all peripherals active: 20-25 mA; size the LDO accordingly.
Use Peripheral Pin Select (PPS) to remap remappable peripherals (UART, SPI, I2C, etc.) to convenient I/O clusters, simplifying PCB routing and reducing trace crossings. Plan for PGED1/PGEC1 (RB0/RB1) accessibility for ICSP programming - do not bury these pins under BGA companions or shield cans. Keep USB D+/D- traces matched within 150 mil and 90 ohm differential impedance.
Do not exceed the rated CPU clock for the speed grade - the -I/ML is 40 MHz, the -50I/ML is 50 MHz. Mixing speed grades causes unstable Flash reads. Also, configure the JTAG/Trace pins as analog or GPIO before boundary-scan programming to avoid driving analog signals onto JTAG pads accidentally.
Compliance Information
RoHS-compliant per Microchip product page. Industrial temperature grade -40C to +105C; not AEC-Q100 qualified. Choose PIC32MX220F032DT-V/ML extended variants or automotive PIC32MX equivalents for automotive applications.