PIC32MX220F032BT-V/ML - 32-bit 40MHz MCU, 32KB Flash, 28-QFN | Microchip
MPN: PIC32MX220F032BT-V/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.79 | $27.90 |
| 100 | $2.41 | $241.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC32MX220F032BT-V/ML Overview
What is a PIC32MX microcontroller? The PIC32MX family is Microchip's 32-bit MIPS-based microcontroller line, sitting hierarchically within the broader PIC microcontroller family (8-bit PIC10/12/16/18 -> 16-bit PIC24/dsPIC -> 32-bit PIC32) and the wider category of embedded microcontrollers -> semiconductors. PIC32MX devices combine 32-bit RISC performance (up to 83 DMIPS) with rich peripheral integration, targeting applications from general-purpose embedded control to audio, connectivity, and graphical user interfaces.
Key features of the PIC32MX220F032BT-V/ML include peripheral pin select (PPS) functionality for flexible signal routing, a parallel master port (PMP) for graphics interfaces, two I2S/SPI modules for codec and serial communication, two UART and I2C modules, an integrated charge time measurement unit (CTMU) for mTouch capacitive touch sensing, and up to four DMA channels. The 32 KB Flash and 8 KB SRAM are adequate for small- to medium-sized embedded applications.
Architecturally, the PIC32MX220F032B employs a MIPS32 M4K core with a five-stage pipeline and hardware multiply/divide, achieving 1.56 DMIPS/MHz. Separate PLLs are provided for CPU and USB clocks (USB 2.0 full-speed OTG is supported on the PIC32MX220 family but not exposed on all 28-QFN pins). Multiple low-power modes (Sleep, Idle, Deep Sleep) reduce current consumption to sub-mA levels for battery-powered designs.
Typical applications include consumer audio devices, low-cost graphics interfaces, USB peripherals, capacitive touch user interfaces, industrial control nodes, sensor hubs, and automotive body electronics. The combination of PPS, PMP, and 32 KB Flash makes the PIC32MX220F032BT-V/ML a versatile choice for cost-sensitive 32-bit designs.
When designing with this MCU, careful attention must be paid to the 28-QFN PCB land pattern - the exposed thermal pad must be soldered to a sufficiently large copper pour for thermal dissipation and electrical ground. The CTMU peripheral requires calibration for accurate touch measurements, and PPS registers must be unlocked and configured before use.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX220F032BT-V/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 PIC32MX220F032BT-V/ML (same form factor and footprint) — differing in ADC, Package, Core Architecture, USB, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032B-I/ML
✅ Drop-In✓ In Stock
$2.44 / Unit
View Datasheet →PIC32MX220F032BT-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX170F256B-V/ML
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →PIC32MX210F016D-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX170F256BT-V/ML
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →PIC32MX174F256D-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX220F032BT-V/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Size | 32-bit |
| Maximum Clock Speed | 40 MHz |
| DMIPS Performance | up to 83 DMIPS |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Supply Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C |
| I/O Pins | 21 (approx., per QFN-28 footprint) |
| Package | 28-QFN (6x6 mm) |
| Package Code | ML |
| Mounting Type | Surface Mount |
| ADC | 10-bit |
| DMA Channels | Up to 4 |
| Communication Interfaces | UART, I2C, SPI, I2S, USB (per family) |
| RoHS Status | Compliant |
PIC32MX220F032BT-V/ML Pin Configuration
| Pin 1 | RA0 — General purpose I/O / analog input |
| Pin 2 | RA1 — General purpose I/O / analog input |
| Pin 3 | RB0 — General purpose I/O / programming clock |
| Pin 4 | RB1 — General purpose I/O / programming data |
| Pin 5 | RB2 — General purpose I/O |
| Pin 6 | RB3 — General purpose I/O |
| Pin 7 | RB4 — General purpose I/O |
| Pin 8 | RB5 — General purpose I/O |
| Pin 9 | RB6 — General purpose I/O |
| Pin 10 | RB7 — General purpose I/O |
| Pin 11 | RB8 — General purpose I/O |
| Pin 12 | RB9 — General purpose I/O |
| Pin 13 | RB10 — General purpose I/O |
| Pin 14 | RB11 — General purpose I/O |
| Pin 15 | RB12 — General purpose I/O |
| Pin 16 | RB13 — General purpose I/O |
| Pin 17 | RB14 — General purpose I/O |
| Pin 18 | RB15 — General purpose I/O |
| Pin 19 | AVDD — Analog supply voltage |
| Pin 20 | AVSS — Analog ground |
| Pin 21 | VDD — Digital supply voltage |
| Pin 22 | VSS — Digital ground |
| Pin 23 | OSC1 — Crystal oscillator input |
| Pin 24 | OSC2 — Crystal oscillator output |
| Pin 25 | MCLR — Master clear reset input |
| Pin 26 | PGEC1 — ICSP programming clock |
| Pin 27 | PGED1 — ICSP programming data |
| Pin 28 | EP — Exposed thermal pad (must be soldered to GND) |
Typical Applications
PIC32MX220F032BT-V/ML is suitable for 7 applications: Consumer Audio Devices, Capacitive Touch User Interfaces, USB Peripherals and HID Devices, Low-Cost Graphical User Interfaces, Automotive Body Electronics, Industrial Sensor Hubs, IoT Edge Nodes and Wearables.
Consumer Audio Devices
The PIC32MX220F032BT-V/ML is well suited for consumer audio devices including Bluetooth speakers, headphone amplifiers, and low-cost sound bars. The device's two I2S/SPI modules connect directly to external audio codecs (such as Microchip's PIC32 Audio Codec family) for stereo I2S audio streaming, while the 32 KB Flash accommodates small audio processing libraries (MP3, AAC decoding) and USB audio class firmware. The MIPS32 M4K core at 40 MHz delivers enough MIPS to handle USB Full-Speed audio at 48 kHz/16-bit stereo, while PPS allows flexible pin assignment to optimize PCB routing.
Recommended
Capacitive Touch User Interfaces
The PIC32MX220F032BT-V/ML integrates a Charge Time Measurement Unit (CTMU) which, combined with the mTouch library, enables robust capacitive touch button and slider implementation. Designers can replace mechanical buttons with capacitive sensors directly driven by PIC32 I/O pins, reducing BOM cost and improving ingress protection (IP-rated enclosures). The CTMU provides calibrated charge-time measurements that translate touch capacitance changes into reliable button-press events, even in the presence of moisture or glove contact.
Recommended
USB Peripherals and HID Devices
The PIC32MX220F032BT-V/ML integrates a USB 2.0 Full-Speed OTG controller with on-chip transceiver, supporting USB device, host, and OTG modes. This makes the part ideal for USB peripherals such as HID keyboards, mice, game controllers, custom HID devices (sensor hubs, diagnostics), and USB-to-UART bridges. The Microchip MLA (Microchip Libraries for Applications) provides ready-to-use USB stack and HID class driver, and the 32 KB Flash is sufficient for CDC + HID composite devices plus application logic.
Recommended
Low-Cost Graphical User Interfaces
The Parallel Master Port (PMP) integrated in the PIC32MX220F032BT-V/ML enables direct connection to parallel-interface LCD displays (typically 8/16-bit), supporting simple graphical user interfaces on cost-sensitive products. The 40 MHz core can refresh small (128x64 to 320x240) monochrome or color displays with sufficient CPU headroom for button handling and menu logic. PPS allows flexible mapping of PMP data lines and control signals to the available QFN-28 pins.
Recommended
Automotive Body Electronics
The PIC32MX220F032BT-V/ML 'V' temperature suffix qualifies the part for -40 C to +105 C operation, suitable for automotive body electronics such as HVAC control heads, seat controllers, lighting controllers, and infotainment auxiliary modules. The 32-bit MIPS core provides deterministic real-time response for body control tasks, while the peripheral pin select (PPS) simplifies PCB routing in space-constrained dashboard enclosures. For AEC-Q100 qualified alternatives, consult Microchip's automotive PIC32 portfolio.
Recommended
Industrial Sensor Hubs
The PIC32MX220F032BT-V/ML is well suited for industrial sensor hubs that aggregate data from multiple analog and digital sensors (temperature, pressure, flow) and forward it via UART, I2C, SPI, or USB to a central controller. The 10-bit ADC, multiple UART/I2C/SPI peripherals, and DMA channels support concurrent sensor sampling without CPU intervention. The wide 2.3V-3.6V supply range accommodates 3.3V industrial rails and battery-backed designs with margin.
Recommended
IoT Edge Nodes and Wearables
The PIC32MX220F032BT-V/ML's low-power Sleep, Idle, and Deep Sleep modes (sub-mA typical current) make it viable for battery-powered IoT edge nodes and wearables. The device can wake on interrupt from sensor inputs, perform data acquisition, transmit via UART/SPI to a Bluetooth Low Energy companion module (e.g., RN4870), and return to deep sleep. The compact 28-QFN (6x6 mm) package fits space-constrained wearable form factors.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032BT-V/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032B-I/ML | PIC32MX220F032BT-I/ML | PIC32MX170F256B-V/ML | PIC32MX210F016D-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (ML) | 28-QFN (ML) - same | 28-QFN (ML) - same | 28-QFN (ML) - same | 28-QFN (ML) - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 256 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 64 KB | 4 KB |
| Maximum Clock Speed | 40 MHz | 40 MHz | 40 MHz | 50 MHz | 40 MHz |
| Temperature Grade | -40C to +105C (V-grade) | -40C to +85C (I-grade) | -40C to +85C (I-grade) | -40C to +105C (V-grade) | -40C to +85C (I-grade) |
| Supply Voltage Range | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Core Architecture | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Shipping Format | Tape & Reel (BT) | Tray (B) | Tape & Reel (BT) | Tray (B) | Tray (D) |
Key Differentiators
- Higher V-grade temperature range than I-grade same-die variant (vs PIC32MX220F032B-I/ML)
- Tape-and-reel packaging for high-volume assembly (vs PIC32MX220F032B-I/ML (tray))
- Compact 6x6 mm 28-QFN for space-constrained designs (vs PIC32MX220F032B-I/SO (SOIC-28))
Design Notes
The 28-QFN (ML) package features an exposed thermal pad (pin 28 / EP) that MUST be soldered to a sufficient ground copper pour on the PCB. Use at least 4 thermal vias in the EP land pattern to connect to an inner ground plane. Without proper thermal dissipation, junction temperature can exceed the -40C to +105C operating range under sustained loads, especially when the USB transceiver or ADC is active. Recommended: minimum 100 mm^2 of ground copper under the IC.
Place a 100 nF decoupling capacitor as close as possible to VDD (pin 21) and a separate 10 uF bulk capacitor on the same supply rail within 5 mm. For analog supply AVDD (pin 19), use an LC or ferrite-bead-isolated filter network from VDD, plus a dedicated 100 nF capacitor at the AVDD pin. Analog and digital grounds should connect at a single point (star ground) under or near the IC exposed pad. PPS-configured pins must be unlocked via CFGCON register before PPS assignment takes effect.
Three common pitfalls: (1) Forgetting to unlock and configure PPS registers - PPS-mapped peripherals will not function until CFGCON.PPSLOCKED bit is cleared and CFGCON.IOLOCK sequence is performed. (2) Exceeding 40 MHz at 2.3V - the PIC32MX220F032BT-V/ML specifies 40 MHz maximum; higher speeds require the 50 MHz -50I variant. (3) Not configuring the CTMU calibration - capacitive touch measurements drift without proper CTMU trim and current source calibration via the RTCC calibration registers.
For USB Full-Speed (12 Mbps) applications, route the USB D+/D- traces as a 90-ohm differential pair with length matching to within 150 mils. Place the 15 kohm pull-up resistor on D+ near the connector side, not the MCU side, to avoid stub reflections. Series ferrite beads on VDD and AVDD rails help reduce conducted noise from USB switching events coupling into sensitive analog circuits.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - 'V' suffix indicates V-grade temperature range (-40C to +105C) only, not formal automotive qualification. For AEC-Q100 qualified alternatives, contact Microchip automotive representatives.
