PIC32MX220F032D-I/ML - 32-bit MCU 32KB Flash 40MHz USB | Microchip
MPN: PIC32MX220F032D-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.68 | $1,680.00 |
| 3,000 | $1.45 | $4,350.00 |
PIC32MX220F032D-I/ML Overview
A 32-bit microcontroller (MCU) is a single-chip processor whose internal datapath, registers, and ALU are 32 bits wide, enabling higher code density, larger linear address space, and substantially better MIPS per MHz than 8- or 16-bit cores. The PIC32MX2xx family belongs to the broader taxonomy: microcontroller -> 32-bit MCU -> MIPS M4K core -> PIC32MX1XX/2XX family -> USB-capable sub-family -> PIC32MX220 specific part. Within a system, a 32-bit MCU sits at the device tree between the power management IC and application peripherals, providing deterministic embedded control, USB connectivity, and on-chip analog for sensor and HMI subsystems.
The PIC32MX220F032D differentiates itself by combining USB FS device, PMP graphics, and CTMU touch in a single 44-pin QFN at sub-USD 3 pricing, eliminating the need for an external touch controller. Peripheral Pin Select remaps most digital functions to user-chosen pins, simplifying PCB layout in dense designs. The MIPS M4K core executes most instructions in a single cycle and supports 5-stage pipeline operation.
Typical applications include USB HID peripherals (keyboards, mice, custom HIDs), low-cost graphic LCD/segmented displays driven via PMP, capacitive touch sliders and buttons using the CTMU, industrial sensor front-ends with on-chip 10-bit ADC, and embedded control nodes that previously required an 8-bit MCU plus external USB bridge. The 32 KB Flash / 8 KB SRAM footprint is well matched to USB stacks such as Microchip's MLA USB device framework.
When designing with this MCU, allocate the 8 KB SRAM carefully: USB device stacks typically consume 1.5-3 KB, leaving limited headroom for application buffers. The QFN exposed pad must be soldered to a continuous ground copper pour for thermal dissipation and signal return. Decouple each VDD/VUSB pair with a 0.1 uF ceramic plus 10 uF bulk capacitor placed within 3 mm of the pin.
This page synthesizes XAIPART distributor pricing, drop-in same-package alternatives, and practical design notes for USB and touch applications that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC32MX220F032D-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 PIC32MX220F032D-I/ML (same form factor and footprint) — differing in Package, Parallel Master Port (PMP), ADC, Active Current Consumption, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032D-50I/ML
✅ Drop-In✓ In Stock
$2.99 / Unit
View Datasheet →PIC32MX230F064D-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128D-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032D-V/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX270F256D-I/ML
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →PIC32MX210F016D-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032D-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 40 MHz (-I/ML grade), 50 MHz (-50I/ML grade) |
| DMIPS | 83 DMIPS at 50 MHz (family maximum) |
| Program Flash Memory | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| I/O Pins | 34 |
| Timers | Five 16-bit |
| ADC | 10-bit, up to 13 input channels |
| DAC | 5-bit |
| USB | USB 2.0 Full-Speed Device, On-chip transceiver |
| Serial Interfaces | 2x I2S/SPI, 2x I2C, 2x UART |
| Peripheral Pin Select (PPS) | Yes |
| Parallel Master Port (PMP) | Yes, for graphics interfaces |
| Charge Time Measurement Unit (CTMU) | Yes, for mTouch capacitive touch |
| Operating Temperature (Industrial -I grade) | -40 C to +85 C |
| Family Temperature Range | -40 C to +105 C |
| Active Current Consumption | less than 0.5 mA/MHz |
| Package | 44-pin QFN (ML) 8x8 mm with exposed pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per Microchip package rating) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX220F032D-I/ML Pin Configuration
| Pin 1 | RB0 — General I/O / PGED1 |
| Pin 2 | RB1 — General I/O / PGEC1 |
| Pin 3 | RB2 — General I/O |
| Pin 3 | Note — Pin numbers follow Microchip 44-pin QFN convention; refer to datasheet pin diagram for full mapping including VDD/VSS pairs and USB D+/D-. |
Typical Applications
PIC32MX220F032D-I/ML is suitable for 6 applications: USB HID Peripherals, Capacitive Touch HMIs, Low-Cost Graphic LCD Interfaces, Industrial Sensor Front-Ends, USB-to-UART/I2C/SPI Bridge, Consumer Appliance Controllers.
USB HID Peripherals
The PIC32MX220F032D-I/ML's integrated USB 2.0 Full-Speed device controller with on-chip transceiver makes it ideal for USB keyboards, mice, game controllers, and custom HID peripherals. Its 8 KB SRAM comfortably holds Microchip's MLA HID stack plus a 6KRO keyboard buffer, while the 32 KB Flash accommodates a USB bootloader and full HID descriptor tables. The CTMU scans up to 16 capacitive buttons concurrently, replacing external touch ICs. Compared to a discrete 8-bit MCU plus external USB bridge, the PIC32MX220F032D-I/ML cuts BOM cost by ~USD 0.80 and PCB area by ~30%. It supports USB suspend/resume and remote wake-up for low-power peripherals.
Recommended
Capacitive Touch HMIs
The PIC32MX220F032D-I/ML's integrated Charge Time Measurement Unit (CTMU) delivers sub-10 pF resolution capacitive touch sensing with up to 16 channels, eliminating external touch controllers like the MTCH6102. Designers implement mTouch sliders, wheels, and buttons directly in firmware, saving USD 0.50-1.00 in BOM and up to 80 mm^2 of board space. The 40 MHz MIPS M4K core processes touch scans in under 200 us per cycle, supporting 100 Hz refresh rates with CPU headroom for HMI logic. The industrial -40 C to +85 C rating covers automotive cabin and industrial panel environments.
Recommended
Low-Cost Graphic LCD Interfaces
The PIC32MX220F032D-I/ML's Parallel Master Port (PMP) drives up to 16-bit parallel graphic LCDs (including ST7565-based 128x64, ILI9341-based 240x320, and monochrome OLEDs) without external driver ICs. PMP throughput at 40 MHz is 80 MB/s - more than sufficient for 4-inch QVGA refresh at 30 fps with partial screen updates. The 8 KB SRAM supports double-buffered small displays up to 128x64, while the 32 KB Flash holds bitmap fonts and frame libraries. Industrial designers use it for HVAC controllers, medical instrument displays, and metering panels where low cost (<USD 3 BOM) outweighs graphics complexity.
Recommended
Industrial Sensor Front-Ends
The PIC32MX220F032D-I/ML integrates a 10-bit ADC with up to 13 input channels and a 5-bit DAC, ideal for industrial sensor aggregation nodes (temperature, pressure, flow, 4-20 mA loops). Its 5-stage MIPS M4K pipeline processes PID loops at 40 MHz with deterministic timing, and PPS routing simplifies PCB layout for 4-layer industrial boards. The 34 GPIO pins handle multiple sensor buses (I2C, SPI, UART) simultaneously. The 2.3-3.6 V supply aligns with 3.3 V industrial sensor rails, while the USB port enables direct configuration from a host PC during commissioning.
Recommended
USB-to-UART/I2C/SPI Bridge
The PIC32MX220F032D-I/ML serves as a cost-effective USB-to-serial bridge (replacing the FTDI FT232R or CP2102N with ~USD 1 BOM savings). Its on-chip USB device, dual UART, dual I2C, and dual I2S/SPI peripherals let it bridge host PCs to legacy industrial equipment. Firmware can be flashed via the built-in USB bootloader, eliminating the need for a programming header on production units. The 32 KB Flash accommodates CDC, vendor-class, and DFU interfaces concurrently, supporting in-field firmware updates over USB.
Recommended
Consumer Appliance Controllers
The PIC32MX220F032D-I/ML powers next-generation consumer appliances (smart coffee machines, espresso makers, robotic vacuums, smart kitchen scales) that need USB charging ports, capacitive touch HMIs, and low-cost motor control via PWM. Its five 16-bit timers drive multi-channel PWM for brushed DC and stepper motors, while the 32 KB Flash holds application firmware plus a USB stack for diagnostics. The industrial -40 C to +85 C range covers typical appliance ambient conditions, and the 44-pin QFN 8x8 mm footprint fits into compact appliance enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032D-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032D-50I/ML | PIC32MX230F064D-I/ML | PIC32MX250F128D-I/ML | PIC32MX220F032D-V/ML | PIC32MX270F256D-I/ML | PIC32MX210F016D-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN (ML) 8x8 mm | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same | MIPS32 M4K 32-bit - same |
| Maximum CPU Speed | 40 MHz | 50 MHz (+25%) | 50 MHz (+25%) | 50 MHz (+25%) | 40 MHz (same) | 50 MHz (+25%) | 40 MHz (same) |
| Flash Memory | 32 KB | 32 KB (same) | 64 KB (+100%) | 128 KB (+300%) | 32 KB (same) | 256 KB (+700%) | 16 KB (-50%) |
| SRAM | 8 KB | 8 KB (same) | 16 KB (+100%) | 32 KB (+300%) | 8 KB (same) | 64 KB (+700%) | 4 KB (-50%) |
| USB | USB 2.0 FS Device | USB 2.0 FS Device - same | USB 2.0 FS Device - same | USB 2.0 FS Device - same | USB 2.0 FS Device - same | USB 2.0 FS Device - same | USB 2.0 FS Device - same |
| Temperature Grade | Industrial -40 C to +85 C | Industrial -40 C to +85 C - same | Industrial -40 C to +85 C - same | Industrial -40 C to +85 C - same | Extended -40 C to +105 C | Industrial -40 C to +85 C - same | Industrial -40 C to +85 C - same |
| 1k-Reel Price (USD, approx.) | 1.68 | 1.85 | 2.25 | 2.85 | 2.10 | 3.40 | 1.50 |
Key Differentiators
- Same-package speed upgrade with zero PCB change (vs PIC32MX220F032D-50I/ML)
- Same-footprint memory upgrade path to 128 KB Flash (vs PIC32MX250F128D-I/ML)
- Lower-cost same-footprint variant for smaller firmware (vs PIC32MX210F016D-I/ML)
- Extended-temperature variant in same package (vs PIC32MX220F032D-V/ML)
Design Notes
Decouple each VDD pin with a 0.1 uF ceramic plus 10 uF bulk within 3 mm of the IC. The USB VUSB pin requires a 0.1 uF ceramic; the internal 3.3 V regulator (when used) needs a 4.7 uF tantalum plus 0.1 uF ceramic on VDDCORE. Without proper decoupling the CTMU touch readings will drift by 5-10% under USB bus activity. Place the bulk capacitor on the same board layer as the MCU and route the return path through the exposed pad ground pour.
The 44-pin QFN (8x8 mm) exposed pad MUST be soldered to a continuous ground copper pour, ideally filling the entire footprint center and stitched with thermal vias to inner ground planes. For a 4-layer board use at least 9 thermal vias (0.3 mm drill, 0.6 mm pad) on a 1.2 mm grid. Without proper exposed-pad soldering junction temperature can rise 15-20 C above ambient at 50 MHz full CPU load, threatening the -40 C to +85 C industrial rating.
Do not forget to configure the JTAG pins (PGECx/PGEDx) as digital inputs after debugging is complete - leaving JTAG enabled consumes ~1 mA extra quiescent current and exposes the firmware to debug-port attacks. The PPS feature lets you remap peripheral functions, but if you change PPS settings at runtime you must disable interrupts during the unlock sequence or the MCU will lock up. Finally, always clear the JTAGEN bit in CFGCON before sealing production firmware.
Route the USB D+ and D- traces as a 90 ohm differential pair with continuous ground reference on the layer below. Keep total trace length under 50 mm to meet USB 2.0 FS signal-integrity masks. The 44-pin QFN has 0.65 mm pitch - use 0.15 mm trace width with 0.15 mm spacing for escape routing, fanning out to 0.2 mm/0.2 mm beyond the package. Place a ferrite bead on VUSB if the board is powered from a noisy host port.
Compliance Information
RoHS and REACH compliant per Microchip product page. The -I/ML grade is industrial (-40 C to +85 C); choose PIC32MX220F032D-V/ML for extended 105 C operation. No AEC-Q100 automotive qualified variant in the MX220 family.