PIC32MX220F032DT-I/TL - 40MHz 32-bit MCU, 32KB Flash | Microchip
MPN: PIC32MX220F032DT-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC32MX220F032DT-I/TL Overview
A microcontroller (MCU) is a single-chip processor that integrates a CPU core, memory (Flash for code, SRAM for data), and programmable peripherals. The 32-bit MCU category sits between 8/16-bit microcontrollers (e.g., PIC16, PIC24) and application processors (e.g., Cortex-A). PIC32 devices use the MIPS M4K architecture, which delivers high code density and deterministic interrupt response for embedded control. Within the PIC32 family hierarchy, MX-class devices are general-purpose, MZ-class devices add higher performance and FPU/DSP, and the PIC32MX2xx sub-family targets cost-sensitive USB-enabled designs.
Key features of the PIC32MX220F032DT-I/TL include Peripheral Pin Select (PPS) for flexible pin-function remapping, a 4-channel hardware DMA controller with automatic data-size detection, separate PLLs for the CPU and USB clocks (allowing 48 MHz USB without disturbing system timing), and a Charge Time Measurement Unit (CTMU) for capacitive sensing. Five 16-bit timers/counters and a Real-Time Clock/Calendar (RTCC) module support motor control, periodic sampling, and timekeeping. The device is offered in industrial temperature grade (-40C to +85C) and supports JTAG and 2-wire programming/debug.
Typical applications include low-cost USB peripherals (HID, CDC, custom classes), small graphical user interfaces using PMP-driven LCDs, sensor hubs for IoT protocol end-points, and battery-powered data loggers. The combination of USB, PMP, and CTMU enables designers to add touch input and USB connectivity with a single chip, replacing discrete USB-to-UART bridges and external ADCs in compact products.
When designing with the PIC32MX220F032DT-I/TL, observe the USB electrical requirements (48 MHz clock accuracy, board layout for portable impedance) and provide adequate decoupling on VDD/VUSB. Use MPLAB X IDE with the XC32 compiler; project libraries such as the Microchip USB Framework and Harmony simplify USB stack integration and reduce firmware development time significantly.
Drop-in alternatives for PIC32MX220F032DT-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 PIC32MX220F032DT-I/TL (same form factor and footprint) — differing in Package, Timers, ADC, DMA Channels, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
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View Datasheet →PIC32MX220F032DT-I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| I/O Pins | 34 |
| Package | 44-pin VTLA (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| USB Module | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 13 channels |
| Timers | 5 x 16-bit |
| UART Modules | 2 |
| I2C Modules | 2 |
| Parallel Master Port (PMP) | Yes |
| DMA Channels | 4 with auto data-size detection |
| Peripheral Pin Select (PPS) | Yes |
| CTMU (Capacitive Touch) | Yes |
| RoHS Status | Compliant |
PIC32MX220F032DT-I/TL Pin Configuration
| Pin 1 | SVDD — Switcher VDD output (internal regulator output) |
| Pin 2 | AN0/CVD7/RPB0/PMD0 — Analog input 0 / CVD cap 7 / GPIO RB0 / PMP data 0 |
| Pin 3 | AN1/CVD8/RPB1/PMD1 — Analog input 1 / CVD cap 8 / GPIO RB1 / PMP data 1 |
| Pin 4 | AN2/CVD9/RPB2/PMD2 — Analog input 2 / CVD cap 9 / GPIO RB2 / PMP data 2 |
| Pin 5 | AN3/RPB3/PMD3 — Analog input 3 / GPIO RB3 / PMP data 3 |
| Pin 6 | AN4/RPB4/PMD4 — Analog input 4 / GPIO RB4 / PMP data 4 |
| Pin 7 | AN5/RPB5/PMD5 — Analog input 5 / GPIO RB5 / PMP data 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RC13 — Crystal oscillator input / external clock input / GPIO RC13 |
| Pin 10 | OSC2/CLKO/RC14 — Crystal oscillator output / clock output / GPIO RC14 |
| Pin 11 | VDD — Positive supply voltage (2.3-3.6 V) |
| Pin 12 | RA0 — GPIO RA0 |
| Pin 13 | RA1 — GPIO RA1 |
| Pin 14 | RB6/PGEC1 — GPIO RB6 / Programming clock (ICSP) |
| Pin 15 | RB7/PGED1 — GPIO RB7 / Programming data (ICSP) |
| Pin 16 | RA2 — GPIO RA2 |
| Pin 17 | RA3 — GPIO RA3 |
| Pin 18 | RA4 — GPIO RA4 |
| Pin 19 | RA5 — GPIO RA5 |
| Pin 20 | RA6 — GPIO RA6 |
| Pin 21 | RC0 — GPIO RC0 |
| Pin 22 | VUSB — USB 3.3 V supply voltage (powered from internal LDO when USB provided) |
| Pin 23 | D+ — USB D+ data line |
| Pin 24 | D- — USB D- data line |
| Pin 25 | RB8 — GPIO RB8 |
| Pin 26 | RB9 — GPIO RB9 |
| Pin 27 | RB10 — GPIO RB10 |
| Pin 28 | AVDD — Analog supply voltage (must be equal to VDD) |
| Pin 29 | AVSS — Analog ground reference |
| Pin 30 | AN6/RPB11 — Analog input 6 / GPIO RB11 |
| Pin 31 | AN7/RPB12 — Analog input 7 / GPIO RB12 |
| Pin 32 | AN8/RPB13 — Analog input 8 / GPIO RB13 |
| Pin 33 | AN9/RPB14 — Analog input 9 / GPIO RB14 |
| Pin 34 | AN10/RPB15 — Analog input 10 / GPIO RB15 |
| Pin 35 | VSS — Ground reference |
| Pin 36 | RC1 — GPIO RC1 |
| Pin 37 | RC2 — GPIO RC2 |
| Pin 38 | RC3 — GPIO RC3 |
| Pin 39 | RC4 — GPIO RC4 |
| Pin 40 | RC5 — GPIO RC5 |
| Pin 41 | RC6 — GPIO RC6 |
| Pin 42 | RC7 — GPIO RC7 |
| Pin 43 | RC8 — GPIO RC8 |
| Pin 44 | RTCC/RPA7 — RTCC output / GPIO RA7 (also VBAT on some PIC32 variants) |
Typical Applications
PIC32MX220F032DT-I/TL is suitable for 7 applications: USB HID Peripheral (Keyboard/Mouse/Gamepad), Industrial Sensor Hub with USB Diagnostics, Small Graphical LCD Interface via PMP, USB-to-UART/I2C Bridge, Capacitive Touch User Interface, IoT Edge Node / Sensor Data Logger, Battery-Powered Data Acquisition.
USB HID Peripheral (Keyboard/Mouse/Gamepad)
The PIC32MX220F032DT-I/TL's integrated USB 2.0 Full-Speed device controller and 32 KB Flash make it an ideal core for USB HID peripherals such as keyboards, mice, gamepads, and consumer-control remotes. The 40 MHz MIPS M4K core executes HID class drivers comfortably alongside application logic, while the 8 KB SRAM holds endpoint buffers plus report data structures without external memory. The Peripheral Pin Select (PPS) feature routes USB, UART, and GPIO to any user-defined pin, simplifying PCB layout. Connect the D+/D- lines to pins 23/24 with the recommended 15 K pull-down on D- for full-speed detection. With Microchip's free USB Framework, designers complete HID enumeration in days rather than months. Compared to discrete USB chips with VCOM, the integrated approach reduces BOM cost by 30-50% and frees board area for compact consumer peripherals.
Recommended
Industrial Sensor Hub with USB Diagnostics
Use the PIC32MX220F032DT-I/TL as a USB-connected sensor hub for industrial monitoring equipment, leveraging its 10-bit ADC up to 13 channels, two UARTs for RS-485/RS-232 sensor chains, and USB device interface for configuration/datalogging on a host PC. The 32 KB Flash accommodates Modbus protocol libraries plus sensor-conditioning code; the 8 KB SRAM is sufficient for 4-channel DMA-driven ADC sampling at 100 Hz while sustaining USB throughput. The 2.3-3.6 V supply range accepts 3.3 V regulated industrial buses and battery-backed configurations. The exposed thermal pad dissipates self-generated heat in sealed IP65 enclosures. Compared to discrete ADC+MCU designs, the integrated approach reduces component count, BOM, and assembly cost while improving long-term availability of the sensing chain.
Recommended
Small Graphical LCD Interface via PMP
The PIC32MX220F032DT-I/TL's integrated Parallel Master Port (PMP) drives small graphical TFT or OLED LCDs (up to 8-bit parallel bus) without an external display controller, simplifying BOM for compact HMI products. The 40 MHz core comfortably refreshes QVGA (320x240) monochrome panels at 30+ fps while running application logic. The 8 KB SRAM holds display framebuffers for small panels; the 32 KB Flash stores font tables and basic UI code. The CTMU module supports capacitive touch keys on the same PCB, enabling touch+HMI integration with a single MCU. The exposed pad of the 44-VTLA package aids thermal dissipation in fanless sealed HMI units. Compared to SPI-display designs with external controllers, the integrated PMP+CTMU approach reduces both component count and assembly cost.
Recommended
USB-to-UART/I2C Bridge
The PIC32MX220F032DT-I/TL is an excellent USB-to-UART/I2C bridge, replacing dedicated bridge ICs such as FTDI chips and reducing BOM cost. The integrated USB 2.0 Full-Speed device and two UART modules allow transparent serial port emulation on a host PC (CDC class) while the second UART bridges to a target device. The Peripheral Pin Select feature routes UART/I2C pins flexibly to simplify PCB layout. The 32 KB Flash is more than sufficient for CDC enumeration (CIR) and small protocol stacks. The exposed thermal pad of the 44-VTLA package supports industrial temperature operation. Compared to discrete FTDI-based bridges, the integrated approach costs less and removes the dependency on a specific bridge vendor.
Recommended
Capacitive Touch User Interface
The PIC32MX220F032DT-I/TL's integrated Charge Time Measurement Unit (CTMU) and Peripheral Pin Select enable cost-effective capacitive touch buttons, sliders, and proximity sensors without dedicated touch ICs. The 32 KB storage holds mTouch firmware and application logic, and the 8 KB SRAM provides ample touch-scan buffer space. Two I2C modules allow the MCU to act as a touch slave to a host processor while USB is reserved for diagnostics/firmware updates. The 2.3-3.6 V supply range supports battery-powered touch interfaces. The 34 I/O pins multiplex across touch channels and other functions via PPS. Compared to dedicated touch ICs, the integrated approach reduces system cost while adding USB and firmware flexibility.
Recommended
IoT Edge Node / Sensor Data Logger
The PIC32MX220F032DT-I/TL is well suited for IoT edge nodes that aggregate sensor data via I2C/UART and expose it locally via USB or store it in non-volatile memory. The two I2C buses connect multiple sensors concurrently, while two UARTs support RS-485 sensor chains. The 32 KB storage holds simple JSON payloads plus command and protocol stacks. The 8 KB SRAM supports 4-channel DMA-driven I2C/UART reception, offloading buffer memory during burst logging. The exposed-pad the 44-VTLA package supports industrial temperature operation in harsh environments. Compared to discrete MCU+UART designs, the integrated approach reduces component count and improves long-term availability of the sensing chain.
Recommended
Battery-Powered Data Acquisition
The PIC32MX220F032DT-I/TL's multiple low-power modes (Sleep, Idle, and deep-sleep modes) combined with the 2.3-3.6 V supply range make it suitable for battery-powered data acquisition modules in field deployments. The 10-bit ADC up to 13 channels multiplexes multiple analog sensors, while the four DMA channels minimize CPU wake-time for power efficiency. The 32 KB Flash holds field-calibration tables and compact data loggers. The exposed-pad 44-VTLA package supports industrial temperature operation in harsh environments. Compared to high-performance Cortex-M designs, the integrated approach balances performance, USB, and low-power operation in a single low-cost chip.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032DT-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032D-I/TL | PIC32MX220F032DT-I/ML | PIC32MX230F064D-I/TL | PIC32MX270F256D-I/TL | PIC32MX210F016DT-I/TL | PIC32MX170F256D-I/TL |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | 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 | 44-VTLA (6x6 mm) - same | 44-VTLA (6x6 mm) - same |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 256 KB | 16 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 32 KB | 4 KB | 64 KB |
| USB Controller | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB |
| 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 | 2.3 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx. Price (qty 1, as of 2026-10-01) | $3.42 | ~$3.30 (tray pack) | ~$3.42 (T&R) | ~$3.85 | ~$5.20 | ~$3.10 | ~$4.90 |
Key Differentiators
- Lowest-cost USB-capable PIC32 in 44-VTLA footprint (vs PIC32MX170F256D-I/TL)
- 40 MHz core with Peripheral Pin Select (PPS) flexibility (vs PIC32MX220F032D-I/TL)
- Compact 6x6 mm VTLA footprint with exposed thermal pad (vs PIC32MX220F032DT-I/PT (TQFP-44T))
Design Notes
USB design requires careful PCB layout. Route the D+ and D- traces as a 90-ohm differential pair with matched length, keeping maximum trace length under 50 mm. Place the 15 K pull-down resistor on D- close to the MCU. Use a common-mode choke on D+/D- if EMC compliance is required. Decouple VUSB with a 4.7 uF ceramic capacitor close to the VUSB pin (pin 22). The exposed thermal pad must be soldered to a copper pour connected to VSS for mechanical strength and electrical grounding; this is critical for thermal dissipation in industrial-temperature applications.
Place a 0.1 uF ceramic decoupling capacitor close to each VDD pin (pins 11 and AVDD pin 28) and a bulk 10 uF tantalum-capacitor on the VDD rail near the MCU. The internal 3.3 V LDO that powers USB requires adequate bulk capacitance on VUSB. Use a separate analog ground (AVSS) connected to the main VSS at a single point (star ground) to reduce ADC noise. For low-power Sleep mode designs, route unused I/O pins as outputs driven low to minimize current leakage. Power-on reset (POR) and Brown-Out Reset (BOR) thresholds should be configured via configuration words for reliable startup under varying supply ramp rates.
Common pitfalls include: (1) Mistaking the -TL suffix for a different pinout than -ML or other suffixes within the PIC32MX2xx family - the package suffix only denotes packaging format (Tape & Reel) or VTLA (6x6 mm) package, not the device variant. Verify the full part number carefully when substituting. (2) Forgetting to enable the JTAG/ICSP pins (PGEC1/PGED1 on pins 14/15) for programming access. (3) Failing to configure unused peripherals via DEVCFG registers, which can cause unwanted current draw. (4) Using ADC channels that share physical pins with VBUS/VUSB without proper isolation. Always consult the latest errata document (DS80000468M) before locking down a design.
Compliance Information
RoHS compliant per Microchip product declaration. Not AEC-Q100 qualified (industrial temperature grade only); not intended for automotive safety-critical applications. Halogen-free status should be confirmed via Microchip compliance portal. Conflict minerals compliant per Microchip supplier declarations.
