PIC32MX220F032D-50I/TL - 32-bit MCU 32KB Flash 50MHz 44-VTLA | Microchip
MPN: PIC32MX220F032D-50I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.87 | $3.87 |
| 10 | $3.55 | $35.50 |
| 100 | $3.18 | $318.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC32MX220F032D-50I/TL Overview
A 32-bit microcontroller (MCU) is an integrated circuit that combines a 32-bit CPU core, program memory (typically Flash), data memory (SRAM), and a rich set of on-chip peripherals such as timers, communication controllers, and analog-to-digital converters on a single die. Microcontrollers sit within the broader hierarchy of microprocessors -> microcontrollers -> 32-bit MCUs -> PIC32 family -> PIC32MX2xx sub-family, and serve as the central processing element in embedded systems ranging from consumer appliances to industrial sensor nodes.
Key features of the PIC32MX220F032D-50I/TL include a 13-channel 10-bit ADC, two I2S/SPI modules for codec and serial communications, Peripheral Pin Select (PPS) for flexible signal routing, a Parallel Master Port (PMP) for graphics interfaces, and a Charge Time Measurement Unit (CTMU) for mTouch capacitive touch buttons and sliders. The device supports three USB comparators, two UART modules, two I2C modules, and four channels of hardware DMA with automatic data size detection. Operating voltage spans 2.3V to 3.6V, and the industrial temperature range covers -40C to +105C.
The architecture uses separate PLLs for the CPU and USB clocks, enabling precise peripheral timing independent of the core frequency. The MIPS M4K pipeline achieves 1.66 DMIPS/MHz, and the multi-vector interrupt controller with five priority levels supports deterministic real-time response. Configurable Watchdog Timer with on-chip Low-Power RC oscillator provides robust fail-safe operation without external components.
Typical applications include USB device peripherals, capacitive touch user interfaces with sliders and buttons, low-cost graphics display controllers, sensor processing nodes, and consumer appliance controllers. The combination of native USB, CTMU touch, and PMP graphics makes it well suited to human-machine interface (HMI) designs. Industrial sensor hubs benefit from the 13 ADC channels and DMA offload.
When designing with this part, note the VTLA package's exposed thermal pad requires careful PCB layout to maintain junction temperature, and the 2.3V minimum supply rules out direct 1.8V-only systems. PPS configuration must be performed at startup to map peripherals to physical pins, and the NRST line requires proper decoupling per the datasheet.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX220F032D-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 PIC32MX220F032D-50I/TL (same form factor and footprint) — differing in ADC, Package, DMA Channels, Maximum CPU Frequency, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032DT-50I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032D-50I/PT
✅ Drop-In✓ In Stock
$1.3475 / Unit
View Datasheet →PIC32MX230F064D-50I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX250F128D-50I/TL
✅ Drop-In✓ In Stock
$3.98 / Unit
View Datasheet →PIC32MX170F256D-50I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032D-50I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 50 MHz (83 DMIPS) |
| Core Performance | 1.66 DMIPS/MHz |
| Program Flash Memory | 32 KB (32K x 8) |
| Data SRAM | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C (Industrial) |
| ADC | 13-channel, 10-bit |
| GPIO Pins | 33 |
| Communication Interfaces | 2x UART, 2x I2C, 2x I2S/SPI, USB (3 comparators) |
| DMA Channels | 4 with automatic data size detection |
| Special Peripherals | PPS, PMP, CTMU (mTouch), RTCC |
| PLL | Separate PLLs for CPU and USB clocks |
| Watchdog Timer | Configurable WDT with on-chip Low-Power RC oscillator |
| Package | 44-pin VTLA (6x6 mm) with thermal pad |
| Mounting Type | Surface Mount |
| Tube Packaging Code | TL (Tube) |
| RoHS Status | Compliant |
PIC32MX220F032D-50I/TL Pin Configuration
| Pin 1 | RPB0/PWM1/RPG0 — Remappable peripheral B0 / PWM1 output / Remappable peripheral G0 |
| Pin 2 | RPB1/PWM2/RPG1 — Remappable peripheral B1 / PWM2 output / Remappable peripheral G1 |
| Pin 3 | RPB2/SDA2/RPG2 — Remappable peripheral B2 / I2C2 SDA / Remappable peripheral G2 |
| Pin 4 | RPB3/SCL2/RPG3 — Remappable peripheral B3 / I2C2 SCL / Remappable peripheral G3 |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RPB4/SCK1/RPG4 — Remappable peripheral B4 / SPI1 clock / Remappable peripheral G4 |
| Pin 7 | RPB5/SDI1/RPG5 — Remappable peripheral B5 / SPI1 data in / Remappable peripheral G5 |
| Pin 8 | RPB6/SDO1/RPG6 — Remappable peripheral B6 / SPI1 data out / Remappable peripheral G6 |
| Pin 9 | RPB7/RPG7 — Remappable peripheral B7 / Remappable peripheral G7 |
| Pin 10 | VDD — Positive supply (2.3 V to 3.6 V) |
| Pin 11 | VSS — Ground reference |
| Pin 12 | RPC0/INT0 — Remappable peripheral C0 / External interrupt 0 |
| Pin 13 | RPC1/INT1 — Remappable peripheral C1 / External interrupt 1 |
| Pin 14 | RPC2/OC1 — Remappable peripheral C2 / Output compare 1 |
| Pin 15 | RPC3/OC2 — Remappable peripheral C3 / Output compare 2 |
| Pin 16 | RPC4/OC3 — Remappable peripheral C4 / Output compare 3 |
| Pin 17 | RPC5/OC4 — Remappable peripheral C5 / Output compare 4 |
| Pin 18 | RPC6/OC5 — Remappable peripheral C6 / Output compare 5 |
| Pin 19 | RPC7/OC6 — Remappable peripheral C7 / Output compare 6 |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply (2.3 V to 3.6 V) |
| Pin 22 | RPD0/SDO2 — Remappable peripheral D0 / SPI2 data out |
| Pin 23 | RPD1/SDI2 — Remappable peripheral D1 / SPI2 data in |
| Pin 24 | RPD2/SCK2 — Remappable peripheral D2 / SPI2 clock |
| Pin 25 | RPD3/RTCC — Remappable peripheral D3 / Real-time clock calendar |
| Pin 26 | RPD4/PMRD — Remappable peripheral D4 / Parallel Master Port read strobe |
| Pin 27 | RPD5/PMWR — Remappable peripheral D5 / Parallel Master Port write strobe |
| Pin 28 | RPD6/PMENB — Remappable peripheral D6 / Parallel Master Port enable |
| Pin 29 | RPD7/PMCS — Remappable peripheral D7 / Parallel Master Port chip select |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply (2.3 V to 3.6 V) |
| Pin 32 | RPE0/PMA0 — Remappable peripheral E0 / Parallel Master Port address bit 0 |
| Pin 33 | RPE1/PMA1 — Remappable peripheral E1 / Parallel Master Port address bit 1 |
| Pin 34 | RPE2/PMA2 — Remappable peripheral E2 / Parallel Master Port address bit 2 |
| Pin 35 | RPE3/PMA3 — Remappable peripheral E3 / Parallel Master Port address bit 3 |
| Pin 36 | RPE4/PMA4 — Remappable peripheral E4 / Parallel Master Port address bit 4 |
| Pin 37 | RPE5/PMA5 — Remappable peripheral E5 / Parallel Master Port address bit 5 |
| Pin 38 | RPE6/PMA6 — Remappable peripheral E6 / Parallel Master Port address bit 6 |
| Pin 39 | RPE7/PMA7 — Remappable peripheral E7 / Parallel Master Port address bit 7 |
| Pin 40 | VSS — Ground reference |
| Pin 41 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 42 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pin 43 | MCLR — Master clear reset input (active low) |
| Pin 44 | VDD — Positive supply (2.3 V to 3.6 V) |
Typical Applications
PIC32MX220F032D-50I/TL is suitable for 8 applications: USB Human-Machine Interface (HMI) Devices, Capacitive Touch Control Panels (mTouch), Low-Cost Graphics Display Controllers, Industrial Sensor Processing Nodes, Consumer Appliance Controllers, USB Barcode Scanner / POS Terminals, IoT Edge Sensor Nodes with USB Debug, Educational / Hobbyist Development Boards.
USB Human-Machine Interface (HMI) Devices
The PIC32MX220F032D-50I/TL fits USB HMI designs because its native USB 2.0 full-speed peripheral with dedicated USB PLL delivers 12 Mbps signaling independent of the 50 MHz CPU clock, eliminating jitter trade-offs. With 32 KB Flash it accommodates USB HID class descriptors and small graphical menus, while 8 KB SRAM handles HID report buffers and short string tables. The separate USB PLL is critical: many 32-bit MCUs force the USB clock to share the CPU PLL, but the PIC32MX220F032D-50I/TL's dual-PLL architecture keeps USB eye diagrams compliant even when the CPU runs at non-integer dividers. Designers benefit from low BOM cost since no external crystal is required for USB - the internal 48 MHz oscillator trims to within USB tolerance.
Recommended
Capacitive Touch Control Panels (mTouch)
The on-chip Charge Time Measurement Unit (CTMU) makes the PIC32MX220F032D-50I/TL ideal for mTouch capacitive touch buttons and sliders. The CTMU provides constant current sources with sub-nA resolution, allowing direct measurement of touch capacitance changes through any GPIO without external analog components. With up to 33 GPIOs available in the 44-VTLA package, designers can implement 8-12 touch buttons plus a slider with the remaining pins driving LEDs and a small PMP-driven LCD. The 10-bit ADC at 13 channels provides supplementary analog sensing for proximity or ambient-light compensation alongside touch.
Recommended
Low-Cost Graphics Display Controllers
The Parallel Master Port (PMP) peripheral in the PIC32MX220F032D-50I/TL enables direct connection to small TFT or monochrome LCD panels without external display driver ICs. PMP supports 8-bit parallel data plus dedicated control lines (RD, WR, RS, CS), and can drive displays up to QVGA resolution with simple framebuffer updates. With 8 KB SRAM, the MCU can hold a small sprite buffer (e.g., 128x64 1-bpp monochrome) and refresh it without DMA overhead. Combined with PPS flexibility, PMP pins can be reassigned if board layout changes - critical for cost-optimized HMI modules.
Recommended
Industrial Sensor Processing Nodes
The PIC32MX220F032D-50I/TL handles industrial sensor aggregation through its 13-channel 10-bit ADC sampling at up to 1 Msps combined with four-channel DMA that moves conversion results to RAM without CPU intervention. Operating from -40C to +105C industrial temperature range, it survives factory floor environments. The dual I2C bus supports multiple digital sensors (temperature, pressure, accelerometer) while UART bridges to RS-485 transceivers for long-distance backhaul. The configurable Watchdog Timer with on-chip Low-Power RC oscillator maintains fail-safe operation even if the main crystal fails - important for unattended sensor installations.
Recommended
Consumer Appliance Controllers
Consumer appliances like coffee machines, washing machines, and air purifiers benefit from the PIC32MX220F032D-50I/TL's combination of USB (for service diagnostics), mTouch (for sleek button-free front panels), PMP (for status displays), and 32 KB Flash for product-feature code. The 2.3-3.6 V supply range supports direct Li-ion battery operation in portable appliances. The MIPS32 M4K core executes real-time control loops with deterministic 5-cycle interrupt latency, while the multi-vector interrupt controller with five priority levels prevents critical events (e.g., over-temperature shutdown) from being starved by display refresh tasks.
Recommended
USB Barcode Scanner / POS Terminals
Point-of-sale terminals and handheld barcode scanners leverage the PIC32MX220F032D-50I/TL's USB device interface, 50 MHz MIPS core, and CTMU touch sensing in a compact 6x6 mm VTLA package. The 32 KB Flash is sufficient for USB HID keyboard emulation plus barcode decoding firmware, while 8 KB SRAM buffers scanned data before USB transmission. PPS allows designers to remap USB D+/D- lines to alternate pins for EMI optimization, and the industrial -40C to +105C range supports outdoor or refrigerated POS environments. Sub-0.5 mA/MHz active current keeps battery life acceptable for portable scanners.
Recommended
IoT Edge Sensor Nodes with USB Debug
IoT edge devices that gather sensor data and expose a USB interface for firmware updates or field debugging benefit from the PIC32MX220F032D-50I/TL's 32-bit performance, USB device port, and small footprint. Designers can implement Modbus RTU, proprietary protocols, or BLE-through-external-coprocessor command sets within 32 KB Flash, with 8 KB SRAM for sensor buffering. The industrial temperature range and 2.3-3.6 V supply tolerate battery droop, while PPS allows post-layout peripheral reassignment when adding sensors. The CTMU supports moisture or liquid-level sensing in agricultural IoT applications.
Recommended
Educational / Hobbyist Development Boards
The PIC32MX220F032D-50I/TL is well suited to low-cost microcontroller teaching platforms because it combines the MIPS32 M4K instruction set with USB device support in a hobbyist-friendly VTLA package mounted on a breakout board. With MPLAB X IDE, Harmony framework, and free Microchip code examples, students can learn 32-bit embedded concepts (interrupts, DMA, PPS, PMP) without high BOM cost. The 32 KB Flash and 8 KB SRAM impose realistic constraints that teach resource-aware coding, while the industrial temperature rating ensures robustness in classroom lab environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032D-50I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032DT-50I/TL | PIC32MX230F064D-50I/TL | PIC32MX250F128D-50I/TL | PIC32MX170F256D-50I/TL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Maximum CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) | 256 KB (+700%) |
| SRAM | 8 KB | 8 KB | 16 KB (+100%) | 32 KB (+300%) | 64 KB (+700%) |
| ADC Channels | 13-channel, 10-bit | 13-channel, 10-bit | 13-channel, 10-bit | 13-channel, 10-bit | 13-channel, 10-bit |
| USB Peripheral | Yes (3 comparators, dedicated PLL) | Yes (3 comparators, dedicated PLL) | Yes (3 comparators, dedicated PLL) | Yes (3 comparators, dedicated PLL) | Yes (3 comparators, dedicated PLL) |
| PPS (Peripheral Pin Select) | Yes | Yes | Yes | Yes | Yes |
| Operating Voltage Range | 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 |
| Operating Temperature Range | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
Key Differentiators
- Lowest unit cost in the PIC32MX2xx family (vs PIC32MX230F064D-50I/TL)
- Dual-PLL architecture isolates USB from CPU clock (vs PIC32MX130F064D-50I/TL (lower-tier PIC32MX1xx))
- On-chip CTMU enables mTouch capacitive sensing without external analog ICs (vs PIC32MX210F016D-I/TL (lower-memory PIC32MX2xx))
- 44-VTLA package offers 6x6 mm footprint with 33 GPIO (vs PIC32MX220F032C-50I/TL (36-VTLA variant))
Design Notes
Place decoupling capacitors (100 nF ceramic plus 4.7 uF bulk) within 2 mm of every VDD pin (10, 21, 31, 44). The PIC32MX220F032D-50I/TL has four VDD pins and five VSS pins scattered across the 44-VTLA package, and inadequate high-frequency decoupling on the USB PLL supply (pin 21 or 31, depending on routing) will manifest as USB enumeration failures or eye-diagram violations. Estimated: at 50 MHz CPU plus active USB, total VDD current can approach 30 mA, so the bulk capacitor must handle USB suspend current transitions without sagging below 2.3 V.
The VTLA (Very Thin Leadless Array) package has no leads; solder joints form directly on castellated pads on the package edge. Per IPC-7351 nominal land patterns, pad length should be 0.5 mm with 0.2 mm solder mask opening. The central exposed thermal pad must be soldered to a thermal copper pour of at least 25 mm squared on the top layer, with thermal vias (0.3 mm diameter, 1.2 mm pitch) connecting to inner ground planes for heat dissipation. Without proper thermal pad soldering, junction-to-ambient thermal resistance (theta_JA) degrades and the part may throttle or fail at high ambient temperatures.
The 44-VTLA package has analog (ANx) and digital signals interleaved. Route sensitive analog traces (ADC inputs, VREF+) away from PWM, SPI clock, and USB differential pairs. The dedicated USB PLL operates at 48 MHz and its harmonics can couple into adjacent analog traces, so place a ground guard ring around the VUSB pin and isolate the USB DP/DM traces with continuous ground pour on both sides. PPS allows post-layout reassignment of digital peripherals but does NOT remap analog channels, so place AN0-AN12 pins strategically during schematic capture.
The MCLR pin (pin 43) requires a 10 kohm pull-up to VDD; floating MCLR causes intermittent resets and prevents reliable debugging. Configuration bits must be set in the IDE before programming - leaving the oscillator selection at the default HS mode with an 8 MHz crystal prevents USB PLL lock. The JTAG pins (TMS, TCK, TDI, TDO) share physical pins with Port A on some PIC32 devices; on the PIC32MX220F032D-50I/TL these are remappable via PPS but must be configured for either JTAG or GPIO, not both. Finally, the CTMU touch sensing requires firmware calibration for each PCB - do not hardcode touch thresholds across board revisions.
USB DP and DM traces must be routed as a 90 ohm differential pair with length matching to within 150 mil (3.8 mm). Total trace length should not exceed 50 mm on the main board to avoid excessive insertion loss. Place the USB series ferrite bead and ESD protection diode close to the USB connector, not at the MCU end, so transient suppression occurs before the trace inductance introduces ringing. The PIC32MX220F032D-50I/TL's internal USB pull-up resistor is software-controlled via the USB module, eliminating the external 1.5 kohm resistor required on older PIC designs.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +105C. Not AEC-Q100 qualified - select PIC32MX2xx automotive variants for vehicle applications.
