PIC32MX220F032BT-50I/SS - 50MHz 32-bit MCU 32KB Flash SSOP-28 | Microchip
MPN: PIC32MX220F032BT-50I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.59 | $359.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.9 | $2,900.00 |
PIC32MX220F032BT-50I/SS Overview
A 32-bit microcontroller is an integrated circuit containing a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, communication controllers, and analog blocks on a single silicon die. In the embedded hierarchy, MCUs sit above 8/16-bit microcontrollers but below application processors, and they dominate real-time control, sensor interfacing, and USB-connected device applications where deterministic interrupt response and low BOM cost matter most.
Key features of the PIC32MX220F032BT-50I/SS include Peripheral Pin Select (PPS) which remaps digital peripherals to any I/O pin, hardware RTCC with calendar mode, five 16-bit timers/counters, two UART modules, and an operating voltage range of 2.3V to 3.6V. Typical active current is below 0.5 mA/MHz at 50 MHz and the industrial temperature grade supports -40C to +85C operation.
Architecturally the device pairs a 5-stage pipelined MIPS32 M4K core capable of 83 DMIPS with a multi-vector interrupt controller and a flexible DMA engine, delivering strong throughput for USB stacks and graphics rendering through PMP. The CTMU enables mTouch capacitive touch sensing without an external timer IC.
Typical applications include USB audio/Class-D device controllers, capacitive touch user interfaces, low-cost graphics HMI panels, sensor data loggers, and industrial control front-ends. Design tip: ensure the 28-pin SSOP land pattern uses 0.65 mm pitch with proper thermal relief on VDD/VSS pins and add a 1 uF + 0.1 uF decoupling pair within 3 mm of the supply pins. This page combines current distributor pricing, drop-in same-package alternatives, and design considerations drawn from the Microchip datasheet.
Drop-in alternatives for PIC32MX220F032BT-50I/SS — 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-50I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, CTMU, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032B-50I/SS
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →PIC32MX220F032B-I/SS
✅ Drop-In✓ In Stock
$2.41 / Unit
View Datasheet →PIC32MX220F032BT-50I/SO
✅ Drop-In✓ In Stock
$2.03 / Unit
View Datasheet →PIC32MX150F128B-I/SS
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC32MX130F256B-I/SS
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →PIC32MX120F032B-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX110F016B-I/SS
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →PIC32MX220F032BT-50I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K |
| Core Width | 32-bit |
| Maximum CPU Frequency | 50 MHz |
| Performance | 83 DMIPS |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-SSOP (5.30 mm body width, 0.65 mm pitch) |
| USB | USB 2.0 Full-Speed Device |
| ADC | 10-bit, up to 13 input channels |
| Comparators | 3 analog comparators |
| Timers | 5 x 16-bit timers/counters |
| Communication | 2x UART, 2x SPI, 2x I2C, 2x I2S |
| PMP (Parallel Master Port) | Yes (for graphics interfaces) |
| CTMU | Yes (Charge Time Measurement Unit for mTouch) |
| RTCC | Yes (Real-Time Clock and Calendar) |
| PPS (Peripheral Pin Select) | Yes |
| Mounting Type | Surface Mount |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX220F032BT-50I/SS Pin Configuration
| Pin 1 | MCLR — Master clear reset input (active-low) |
| Pin 2 | AN0/CVD0/RPB0/CTED1/RB0 — Analog input 0 / GPIO RB0 with PPS |
| Pin 3 | AN1/CVD1/RPB1/RB1 — Analog input 1 / GPIO RB1 with PPS |
| Pin 4 | PGED2/RPB2/RB2 — Programming data / GPIO RB2 with PPS |
| Pin 5 | PGEC2/RPB3/RB3 — Programming clock / GPIO RB3 with PPS |
| Pin 6 | VBUS — USB VBUS sense input |
| Pin 7 | D- — USB D- line |
| Pin 8 | D+ — USB D+ line |
| Pin 9 | VDD — Positive supply (2.3V to 3.6V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | AN4/CVD4/RPB4/RB4 — Analog input 4 / GPIO RB4 with PPS |
| Pin 12 | AN5/CVD5/RPB5/RB5 — Analog input 5 / GPIO RB5 with PPS |
| Pin 13 | PGED1/RPB6/RB6 — ICSP programming data / GPIO RB6 |
| Pin 14 | PGEC1/RPB7/RB7 — ICSP programming clock / GPIO RB7 |
| Pin 15 | AN8/CVD8/RPB8/CTED2/RB8 — Analog input 8 / GPIO RB8 with PPS |
| Pin 16 | AN9/CVD9/RPB9/RB9 — Analog input 9 / GPIO RB9 with PPS |
| Pin 17 | CVBUSON/RPB10/RB10 — USB VBUS-on control / GPIO RB10 with PPS |
| Pin 18 | CVBUSON2/RPB11/RB11 — USB VBUS-on 2 / GPIO RB11 with PPS |
| Pin 19 | AN12/CVD12/RPB12/RB12 — Analog input 12 / GPIO RB12 with PPS |
| Pin 20 | AN13/CVD13/RPB13/RB13 — Analog input 13 / GPIO RB13 with PPS |
| Pin 21 | AN14/CVD14/RPB14/RB14 — Analog input 14 / GPIO RB14 with PPS |
| Pin 22 | AN15/CVD15/RPB15/RB15 — Analog input 15 / GPIO RB15 with PPS |
| Pin 23 | OSC1/CLKI/RC12 — Crystal oscillator input or external clock |
| Pin 24 | OSC2/CLKO/RC15 — Crystal oscillator output |
| Pin 25 | SDA2/RPC4/RC4 — I2C2 SDA / GPIO RC4 with PPS |
| Pin 26 | SCL2/RPC3/RC3 — I2C2 SCL / GPIO RC3 with PPS |
| Pin 27 | RPC2/RC2 — GPIO RC2 with PPS |
| Pin 28 | RPC1/RC1 — GPIO RC1 with PPS |
Typical Applications
PIC32MX220F032BT-50I/SS is suitable for 6 applications: USB HID / CDC Peripheral Devices, Capacitive Touch User Interfaces, Low-Cost Graphics HMI Panels, Industrial Sensor Data Loggers, Consumer Audio / Class-D Accessories, Battery-Powered IoT Sensor Hubs.
USB HID / CDC Peripheral Devices
The PIC32MX220F032BT-50I/SS is ideal for USB HID, CDC, and vendor-class peripherals thanks to its integrated USB 2.0 full-speed device controller with on-chip transceiver. The 50 MHz MIPS32 M4K core provides 83 DMIPS, easily handling USB interrupt latency and HID report generation while leaving cycles for application logic. With 32 KB Flash and 8 KB SRAM it fits HID report descriptors, USB stacks, and small protocol libraries. The 28-SSOP package and 2.3V-3.6V supply simplify direct USB bus-powered designs.
Recommended
Capacitive Touch User Interfaces
The PIC32MX220F032BT-50I/SS integrates the CTMU (Charge Time Measurement Unit) and supports Microchip's mTouch firmware library, enabling up to 13 touch buttons or sliders without any external touch controller IC. The 10-bit ADC with up to 13 channels combined with CTMU timing measurements allows capacitive sensing in noisy industrial environments. PPS lets you remap touch inputs to convenient GPIO pins, simplifying PCB layout for tight keypad designs.
Recommended
Low-Cost Graphics HMI Panels
The Parallel Master Port (PMP) on the PIC32MX220F032BT-50I/SS supports 8-bit or 16-bit parallel interfaces to character and graphic LCDs, enabling low-cost HMI panels without an external graphics controller. The 50 MHz CPU and DMA engine sustain frame-buffer updates for 320x240 QVGA panels while leaving headroom for UI logic. The 28-SSOP package and industrial -40C to +85C temperature range suit factory-floor HMI designs.
Recommended
Industrial Sensor Data Loggers
The PIC32MX220F032BT-50I/SS fits compact industrial sensor loggers combining its 10-bit ADC (up to 13 channels), 3 analog comparators, RTCC, and 8 KB SRAM to buffer sensor bursts. The 50 MHz MIPS core handles filtering, alarm threshold checks, and UART/Modbus telemetry concurrently. Its industrial temperature grade (-40C to +85C) and 2.3V-3.6V supply let it run directly from 3.3V industrial rails.
Recommended
Consumer Audio / Class-D Accessories
The PIC32MX220F032BT-50I/SS supports USB audio class 1.0 devices through its integrated USB full-speed controller and two I2S interfaces for digital audio streaming to external DACs or Class-D amplifiers. The 32 KB Flash holds USB audio descriptors and small buffering logic; 8 KB SRAM is sufficient for short PCM buffers. PPS lets you route I2S to convenient GPIO pairs for tidy PCB routing.
Recommended
Battery-Powered IoT Sensor Hubs
The PIC32MX220F032BT-50I/SS suits IoT sensor hubs where its deep-sleep modes (down to microamp currents), 2.3V-3.6V supply range, and RTCC calendar keep average power draw low while periodically waking on a sensor event. PPS remapping and ample timers enable flexible wake sources including CTMU touch and comparators. The industrial temperature range supports outdoor and HVAC deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032BT-50I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032B-50I/SS | PIC32MX220F032B-I/SS | PIC32MX150F128B-I/SS | PIC32MX130F256B-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (0.65 mm pitch) | 28-SSOP (0.65 mm pitch) - same | 28-SSOP (0.65 mm pitch) - same | 28-SSOP (0.65 mm pitch) - same | 28-SSOP (0.65 mm pitch) - same |
| Maximum CPU Frequency | 50 MHz | 50 MHz | 40 MHz | 50 MHz | 50 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 128 KB | 256 KB |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | No USB | No USB |
| 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 | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Only 28-SSOP PIC32 variant with on-chip USB and small 32 KB Flash (vs PIC32MX150F128B-I/SS)
- Higher 50 MHz CPU speed bin than PIC32MX120/PIC32MX110 family (vs PIC32MX120F032B-I/SS)
- Largest Flash memory in the 28-SSOP PIC32 family (vs PIC32MX130F256B-I/SS)
Design Notes
Place a 1 uF ceramic bulk capacitor and a 0.1 uF decoupling capacitor within 3 mm of the VDD pin (pin 9) and tie VSS (pin 10) to a low-impedance ground pour. For USB bus-powered designs add a 10 uF capacitor at the VBUS pin (pin 6) to handle inrush transients and avoid VBUS droop below 4.4 V during hot-plug events.
Route the USB D+ and D- lines (pins 7 and 8) as a 90-ohm differential pair with matched length and continuous ground reference; keep total trace length below 50 mm. Place the VBUS, D+, and D- series resistors as close to the MCU pins as possible to minimize stub reflections and meet USB 2.0 full-speed signal-integrity masks.
The MCLR pin (pin 1) must be pulled up to VDD through a 10 kohm resistor and a 0.1 uF capacitor; leaving it floating prevents startup or causes intermittent resets. Ensure the ICSP programming pins PGEC2/PGED2 (pins 4 and 5) are accessible in the PCB layout, because the 28-SSOP package does not have dedicated trace pads for a header.
Estimated: at full 50 MHz CPU speed with all peripherals active the typical current draw is below 25 mA (0.5 mA/MHz x 50 MHz) on a 3.3V rail, dissipating around 80 mW. The 28-SSOP package with thermal pad-less lead frame requires at least 100 mm^2 of ground-plane copper connected to VSS (pin 10) to keep junction rise below 15C above ambient.
Compliance Information
RoHS compliant and lead-free per Microchip product page and 28-SSOP matte-tin lead finish. Not AEC-Q100 qualified; industrial-grade temperature range (-40C to +85C) only.
