PIC32MX220F032CT-50I/TL - 32-bit MCU 32KB Flash 50MHz | Microchip
MPN: PIC32MX220F032CT-50I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.05 | $30.50 |
| 100 | $2.68 | $268.00 |
| 500 | $2.31 | $1,155.00 |
| 1,000 | $1.97 | $1,970.00 |
PIC32MX220F032CT-50I/TL Overview
A PIC32MX-series 32-bit microcontroller is a MIPS-based MCU that combines the throughput of a 32-bit core with the peripheral density of a microcontroller, sitting in the taxonomy: 32-bit microcontroller -> embedded microcontroller -> RISC MCU -> Microchip PIC32 family -> semiconductor IC. The M4K core executes most instructions in one cycle and supports up to 50 MHz, while the dedicated USB peripheral, CTMU touch sensing, and RTCC provide on-chip analog timing and calendar functions without external components.
Key features of the PIC32MX220F032CT-50I/TL include a 32KB Flash / 8KB SRAM memory configuration, USB 2.0 full-speed device/host/OTG, three analog comparators, 16-channel 10-bit ADC with 1 Msps conversion rate, and a CTMU that enables capacitance measurement for capacitive touch sensing. The device supports up to 25 I/O pins, multiple serial interfaces including I2C, SPI, and UART, and 5 timer/counters. It also offers DMA for efficient data movement and a JTAG/ICSP programming/debug interface.
Architecturally, the PIC32MX220 uses the MIPS32 M4K core with 5-stage pipeline, a prefetch cache for Flash, and a peripheral bus running at half the system clock. The integrated USB 2.0 full-speed transceiver eliminates the need for external PHY components in many designs, while the CTMU provides a constant current source for time-based capacitive touch or temperature measurement applications. The RTCC maintains timekeeping with an external 32.768 kHz crystal.
Typical applications for the PIC32MX220F032CT-50I/TL include USB peripherals such as HID input devices and CDC serial bridges, capacitive touch user interfaces, low-cost graphics displays, sensor data acquisition nodes, and battery-powered consumer products with RTCC-based timekeeping. The 5x5 mm VTLA package is also well suited to space-constrained IoT endpoint designs where USB connectivity is required.
When designing with this MCU, ensure adequate decoupling on VDD/AVDD pins and follow the layout guidance for the exposed thermal pad. USB applications should follow Microchip's USB design checklist for impedance-controlled traces and proper grounding. For capacitive touch applications, the CTMU requires calibration routines described in the family datasheet.
This page synthesizes distributor pricing, drop-in same-family alternatives from the PIC32MX2xx series, and practical design notes not found on DigiKey/Mouser/Octopart product listings, helping engineers evaluate the PIC32MX220F032CT-50I/TL for embedded USB, touch, and RTCC applications.
Drop-in alternatives for PIC32MX220F032CT-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 PIC32MX220F032CT-50I/TL (same form factor and footprint) — differing in ADC, I/O Pins, Core Architecture, Package, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032C-50I/TL
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC32MX230F032CT-50I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032CT-50V/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032DT-50I/TL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032CT-50I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Width | 32-bit |
| Maximum Clock Frequency | 50 MHz |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Package | 36-pin VTLA (5x5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| Analog Comparators | 3 |
| ADC | 10-bit, up to 1 Msps, 16 channels |
| CTMU (Charge Time Measurement Unit) | Yes |
| RTCC (Real-Time Clock Calendar) | Yes |
| DMA Channels | 6 |
| Timers | 5 |
| I/O Pins | 25 |
| Communication Interfaces | 2x I2C, 2x SPI, 2x UART |
| Temperature Grade | Industrial (-40C to +85C) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX220F032CT-50I/TL Pin Configuration
| Pin 1 | RB0 — I/O port B bit 0 / PGED1 |
| Pin 2 | RB1 — I/O port B bit 1 / PGEC1 |
| Pin 3 | RB2 — I/O port B bit 2 |
| Pin 4 | RB3 — I/O port B bit 3 |
| Pin 5 | VSS — Ground |
| Pin 6 | RB4 — I/O port B bit 4 |
| Pin 7 | RB5 — I/O port B bit 5 |
| Pin 8 | RB6 — I/O port B bit 6 |
| Pin 9 | RB7 — I/O port B bit 7 |
| Pin 10 | VUSB — USB voltage reference (3.3V) |
| Pin 11 | D+ — USB D+ data line |
| Pin 12 | D- — USB D- data line |
| Pin 13 | RA0 — I/O port A bit 0 |
| Pin 14 | RA1 — I/O port A bit 1 |
| Pin 15 | RA2 — I/O port A bit 2 |
| Pin 16 | RA3 — I/O port A bit 3 |
| Pin 17 | RA4 — I/O port A bit 4 |
| Pin 18 | AVDD — Analog supply (3.3V) |
| Pin 19 | AVSS — Analog ground |
| Pin 20 | RA5 — I/O port A bit 5 |
| Pin 21 | RA6 — I/O port A bit 6 |
| Pin 22 | RA7 — I/O port A bit 7 |
| Pin 23 | VDD — Digital supply (3.3V) |
| Pin 24 | VSS — Ground |
| Pin 25 | RC0 — I/O port C bit 0 |
| Pin 26 | RC1 — I/O port C bit 1 |
| Pin 27 | RC2 — I/O port C bit 2 |
| Pin 28 | RC3 — I/O port C bit 3 |
| Pin 29 | RC4 — I/O port C bit 4 |
| Pin 30 | RC5 — I/O port C bit 5 |
| Pin 31 | RC6 — I/O port C bit 6 |
| Pin 32 | RC7 — I/O port C bit 7 |
| Pin 33 | RC8 — I/O port C bit 8 |
| Pin 34 | RC9 — I/O port C bit 9 |
| Pin 35 | OSC1 — Crystal oscillator input |
| Pin 36 | OSC2 — Crystal oscillator output |
Typical Applications
PIC32MX220F032CT-50I/TL is suitable for 6 applications: USB HID Input Devices, Capacitive Touch User Interface, Battery-Powered Sensor Data Logger, USB-to-UART / CDC Serial Bridge, Small Graphic LCD / OLED Display Controller, USB Audio Class Device (Headset / Speaker Dongle).
USB HID Input Devices
The PIC32MX220F032CT-50I/TL is well suited for USB Human Interface Devices such as keyboards, mice, game controllers, and custom input peripherals, because its integrated USB 2.0 full-speed transceiver eliminates the need for an external PHY and the 50 MHz MIPS32 M4K core provides enough throughput to handle HID report parsing alongside application logic. The 32 KB Flash comfortably hosts Microchip's USB stack with HID class driver plus application code, while 8 KB SRAM handles HID report buffers and protocol state. The 36-VTLA (5x5 mm) package suits compact USB dongles, and the RTCC enables timestamped event logging. Compared with external-phy solutions, the integrated USB reduces BOM cost by $0.30-$0.50 and PCB area by 50-100 mm².
Recommended
Capacitive Touch User Interface
The PIC32MX220F032CT-50I/TL's integrated CTMU (Charge Time Measurement Unit) enables cost-effective capacitive touch sensing for buttons, sliders, and proximity sensors on appliance fronts, lighting controls, and consumer products. The CTMU provides a programmable constant current source that charges touch electrodes at rates measured by the 10-bit ADC, while the 50 MHz core runs the touch scanning loop fast enough for 16-32 channels at 10 ms response. The 8 KB SRAM holds per-channel baseline and debounce state, and the 36-VTLA package fits behind a touch PCB overlay. Compared with dedicated touch ICs, the integrated CTMU approach eliminates a companion chip and reduces firmware complexity.
Recommended
Battery-Powered Sensor Data Logger
The PIC32MX220F032CT-50I/TL is a strong fit for battery-powered sensor data loggers with RTCC-based timestamping, where its deep-sleep current under 1 µA with RTCC running, integrated RTCC peripheral with external 32.768 kHz crystal, and 10-bit ADC for sensor digitization deliver multi-year battery life on 2x AA cells. The 32 KB Flash stores small RTOS or bare-metal firmware plus data tables, while the 8 KB SRAM buffers sensor samples between Flash writes. USB connectivity enables direct PC attachment for data offload without an external bridge IC. Compared with 8-bit alternatives, the 32-bit core offers faster sensor processing at lower active current, and the RTCC eliminates an external calendar chip.
Recommended
USB-to-UART / CDC Serial Bridge
The PIC32MX220F032CT-50I/TL can implement a USB CDC serial bridge that presents as a virtual COM port on a host PC, replacing the FTDI FT232 or similar bridge ICs with a single Microchip MCU. The integrated USB peripheral handles enumeration and CDC class requests, while two UART peripherals expose asynchronous serial at up to 3 Mbaud. The 50 MHz MIPS core runs the USB stack and UART bridge with minimal latency, and the 36-VTLA package fits USB stick form factors. The CTMU is unused in this role, freeing it for other design features. Compared with FTDI bridges, the MCU-based approach offers firmware-customizable CDC behavior at a similar BOM cost.
Recommended
Small Graphic LCD / OLED Display Controller
The PIC32MX220F032CT-50I/TL drives small monochrome or color OLED / TFT displays (up to 128x128 or 1.5" color) using its 50 MHz core and PMP/SPI peripherals, making it suitable for low-cost HMI panels on appliances, fitness devices, and instrument front panels. The integrated CTMU is unused in this role, while the RTCC provides real-time clock display updates. The 8 KB SRAM holds frame buffer or display page state, and 32 KB Flash stores fonts, icons, and UI logic. The 36-VTLA package fits behind the display module. Compared with 8-bit MCUs at similar price, the 32-bit core delivers 3-5x faster refresh rates at equivalent power consumption.
Recommended
USB Audio Class Device (Headset / Speaker Dongle)
The PIC32MX220F032CT-50I/TL can serve as a USB Audio Class 1.0 device controller for low-cost USB headsets, microphones, or speaker dongles, leveraging its integrated USB peripheral to enumerate as a USB audio endpoint and stream samples to/from an external audio CODEC via I2S. The 50 MHz MIPS32 M4K core handles USB isochronous transfer and I2S bridging with adequate headroom for 48 kHz / 16-bit stereo audio, while 8 KB SRAM provides sample buffering. The 36-VTLA package suits compact dongle enclosures. Compared with dedicated USB audio chips, the MCU approach adds flexibility for custom HID control channels (volume buttons, mute).
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032CT-50I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032C-50I/TL | PIC32MX230F032CT-50I/TL | PIC32MX220F032CT-50V/TL | PIC32MX220F032DT-50I/TL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 36-VTLA (5x5 mm) | 36-VTLA (5x5 mm) - same | 36-VTLA (5x5 mm) - same | 36-VTLA (5x5 mm) - same | 36-VTLA (5x5 mm) - same |
| Core / Width | MIPS32 M4K / 32-bit | MIPS32 M4K / 32-bit | MIPS32 M4K / 32-bit | MIPS32 M4K / 32-bit | MIPS32 M4K / 32-bit |
| Max Clock Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash / SRAM | 32 KB / 8 KB | 32 KB / 8 KB | 32 KB / 8 KB | 32 KB / 8 KB | 64 KB / 8 KB |
| USB Interface | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG |
| CTMU (Touch) | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (-40C to +105C) | Industrial (-40C to +85C) |
| Differentiator vs This Part | Baseline | Commercial reel orientation | Enhanced DMA + PMP added | Extended temp grade (V) | 2x Flash (64 KB vs 32 KB) |
Key Differentiators
- Industry-standard USB 2.0 Full-Speed with integrated transceiver (vs PIC32MX230F032CT-50I/TL)
- Industrial temperature grade (-40C to +85C) baseline (vs PIC32MX220F032CT-50V/TL)
- CTMU touch sensing on-chip (vs PIC32MX220F032DT-50I/TL)
Design Notes
The PIC32MX220F032CT-50I/TL operates from a single 2.3 V to 3.6 V supply rail. Place a 10 µF tantalum or ceramic bulk capacitor and a 0.1 µF decoupling capacitor as close as possible to each VDD/AVDD pin pair. The VUSB pin (USB voltage reference) requires its own 0.1 µF decoupling and should be tied to VDD in self-powered designs or to the USB VBUS through a 3.3 V LDO in bus-powered designs, per the family datasheet.
The 36-VTLA (5x5 mm) package's exposed thermal pad is the primary heat-dissipation path and must be soldered to a copper pad on the PCB with at least 4 thermal vias connecting to a ground plane. For USB Full-Speed operation at 50 MHz, the typical power consumption is around 25 mA active, which the exposed pad handles comfortably without active cooling. In enclosed industrial environments above 60°C ambient, follow Microchip's thermal layout guide to keep junction temperature below 100°C.
For USB applications, route the D+ and D+ lines as a 90-ohm differential pair with characteristic impedance matching the USB specification, and keep the pair as short as possible (under 50 mm total). Maintain a continuous ground plane under the USB traces, and place the VUSB bypass capacitor within 2 mm of the VUSB pin. Per Microchip's USB design checklist, avoid routing digital signals across the USB differential pair to minimize crosstalk and EMI.
Do not leave the RTCC oscillator pins (SOSCO/SOSCI) floating if the RTCC is used; connect a 32.768 kHz crystal with 7 pF load capacitors per the datasheet. For capacitive touch applications, the CTMU requires periodic calibration via the family reference manual routines, as drift over temperature can exceed 5% without compensation. The ICSP programming pins (PGECx/PGEDx) must be accessible for in-circuit programming; add a 2x5 header or test points on prototype boards.
Compliance Information
RoHS compliant per Microchip product page. Halogen-free status not explicitly stated in verified data; consult Microchip for confirmation. Not AEC-Q100 qualified (industrial grade MCU).