PIC32MX220F032B-50I/SS - 32KB Flash 50MHz MCU | Microchip
MPN: PIC32MX220F032B-50I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.19 | $2,190.00 |
PIC32MX220F032B-50I/SS Overview
A microcontroller unit (MCU) is a self-contained computer on a single chip that integrates a CPU core, program memory (Flash), data memory (SRAM), and a set of peripherals such as timers, serial interfaces, and analog-to-digital converters. MCUs sit within the broader hierarchy of embedded processors, below application processors and above simple 8-bit controllers, and they are the workhorse of modern electronic products because they combine deterministic real-time control with low power consumption and low system cost.
The PIC32MX220F032B-50I/SS distinguishes itself through its MIPS32 M4K core, which executes most instructions in a single cycle and consumes less than 0.5 mA/MHz. It includes two I2S/SPI modules for codec and serial communication, Peripheral Pin Select (PPS) for flexible pin remapping, a Parallel Master Port (PMP) for graphics interfaces, and a Charge Time Measurement Unit (CTMU) for capacitive touch sensing. The device also integrates USB 2.0 full-speed support and advanced analog peripherals, allowing designers to eliminate external components.
Architecturally, the PIC32MX1XX/2XX family uses a 5-stage pipeline with a prefetch cache to sustain near single-cycle execution from Flash. The 32 KB Flash array is organized as 32K x 8, and the 8 KB SRAM supports DMA transfers for audio and graphics data streams. The CTMU provides sub-microsecond time measurement for mTouch capacitive buttons and sliders, while the PMP enables direct connection to parallel LCD controllers without glue logic.
Typical applications include portable audio players and codec interfaces, small graphics displays, USB peripheral devices, capacitive touch control panels, and industrial sensor nodes. The 50 MHz core and 83 DMIPS throughput are sufficient for real-time signal processing and user-interface tasks, while the 2.3 V to 3.6 V supply range supports both 3.3 V and battery-powered designs.
When designing with this device, pay close attention to the ICSP programming pins and the analog supply filtering. The PIC32MX220F032B has more than one pair of PGECx/PGEDx pins; any pair may be used for in-circuit programming, but the clock and data pins must be used as a matched pair. All VSS and VDD pins must be connected and decoupled with 0.1 uF ceramic capacitors placed close to the package.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated in the manufacturer datasheet, giving engineers a single reference for selection, sourcing, and layout decisions.
Drop-in alternatives for PIC32MX220F032B-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 PIC32MX220F032B-50I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature Range, CTMU, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX220F032B-50I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX220F032B-50I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX150F128B-50I/SS
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →PIC32MX130F256B-50I/SS
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →PIC32MX120F032B-50I/SS
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC32MX220F032B-50I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz |
| Performance | 83 DMIPS |
| Flash Program Memory | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Current Consumption | Less than 0.5 mA/MHz |
| Package | 28-pin SSOP (0.209 in / 5.30 mm width) |
| Mounting Type | Surface Mount |
| I2S/SPI Modules | 2 |
| USB | USB 2.0 full-speed device/host/OTG |
| Peripheral Pin Select (PPS) | Supported |
| Parallel Master Port (PMP) | Supported (graphics interface) |
| CTMU | Charge Time Measurement Unit for mTouch capacitive sensing |
| ADC | 10-bit ADC with multiple channels |
| Timers | Multiple 16-bit timers |
| RoHS Status | Compliant |
PIC32MX220F032B-50I/SS Pin Configuration
| Pin 1 | MCLR — Master clear (active-low reset) / programming voltage input |
| Pin 2 | RA0 — Port A digital I/O / analog input AN0 |
| Pin 3 | RA1 — Port A digital I/O / analog input AN1 |
| Pin 4 | RB0 — Port B digital I/O / analog input AN2 |
| Pin 5 | RB1 — Port B digital I/O / analog input AN3 |
| Pin 6 | RB2 — Port B digital I/O / analog input AN4 |
| Pin 7 | RB3 — Port B digital I/O / analog input AN5 |
| Pin 8 | VSS — Ground |
| Pin 9 | RA2 — Port A digital I/O / analog input AN6 |
| Pin 10 | RA3 — Port A digital I/O / analog input AN7 |
| Pin 11 | RB4 — Port B digital I/O / analog input AN8 |
| Pin 12 | RB5 — Port B digital I/O / analog input AN9 |
| Pin 13 | RB6 — Port B digital I/O / PGEC2 programming clock |
| Pin 14 | RB7 — Port B digital I/O / PGED2 programming data |
| Pin 15 | RB8 — Port B digital I/O |
| Pin 16 | RB9 — Port B digital I/O |
| Pin 17 | RB10 — Port B digital I/O |
| Pin 18 | RB11 — Port B digital I/O |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply |
| Pin 21 | RB12 — Port B digital I/O |
| Pin 22 | RB13 — Port B digital I/O |
| Pin 23 | RB14 — Port B digital I/O |
| Pin 24 | RB15 — Port B digital I/O |
| Pin 25 | RA4 — Port A digital I/O |
| Pin 26 | RA5 — Port A digital I/O |
| Pin 27 | VSS — Ground |
| Pin 28 | VDD — Positive supply |
Typical Applications
PIC32MX220F032B-50I/SS is suitable for 6 applications: Portable Audio Player and Codec Interface, Small Graphics Display Controller, USB Peripheral and Human Interface Device, Capacitive Touch Control Panel, Industrial Sensor Node and Data Logger, Battery-Powered Portable Instrument.
Portable Audio Player and Codec Interface
The PIC32MX220F032B-50I/SS fits portable audio designs because its two I2S/SPI modules connect directly to audio codecs, and its 50 MHz M4K core delivers 83 DMIPS for real-time decoding and user-interface tasks. The 8 KB SRAM supports DMA-driven audio buffers, while the 2.3 V to 3.6 V supply range and less than 0.5 mA/MHz current draw extend battery life. In a typical topology, the MCU streams PCM data over I2S to a stereo DAC and reads control input from capacitive touch buttons sensed by the CTMU. The trade-off is that 32 KB Flash limits codec firmware complexity, so designers should budget code space carefully or step up to the 128 KB PIC32MX150F128B-50I/SS when USB audio is not required.
Recommended
Small Graphics Display Controller
The PIC32MX220F032B-50I/SS is suited to small graphics displays because it integrates a Parallel Master Port (PMP) that connects directly to parallel LCD controllers without external glue logic, and the 50 MHz core provides enough throughput to refresh QVGA-class panels. The 8 KB SRAM holds line buffers and font tables, and Peripheral Pin Select lets designers route the PMP data and control lines to the most convenient pins on the 28-pin SSOP package. A typical implementation drives an SPI or 8-bit parallel TFT with the PMP handling pixel writes while the CPU renders UI elements. The main constraint is memory: 32 KB Flash and 8 KB SRAM limit frame-buffer size, so partial-update rendering techniques are recommended for larger displays.
Recommended
USB Peripheral and Human Interface Device
The PIC32MX220F032B-50I/SS includes a USB 2.0 full-speed device/host/OTG module, making it a natural fit for USB peripherals such as HID devices, data loggers, and configuration interfaces. The 50 MHz core and 83 DMIPS throughput handle USB stack processing alongside application code, and the 8 KB SRAM provides endpoint buffers. In a typical design, the MCU enumerates as a composite HID and CDC device, using the CTMU for capacitive touch input and the ADC for analog sensor sampling. Because the USB module is absent from the PIC32MX150F128B-50I/SS and PIC32MX120F032B-50I/SS, the PIC32MX220F032B-50I/SS is the preferred choice whenever USB connectivity is mandatory in the 28-pin SSOP footprint.
Recommended
Capacitive Touch Control Panel
The PIC32MX220F032B-50I/SS is well matched to capacitive touch panels because it integrates a Charge Time Measurement Unit (CTMU) that enables mTouch capacitive button and slider sensing without external touch controllers. The CTMU measures charge/discharge timing with sub-microsecond resolution, and Peripheral Pin Select allows the touch electrodes to be assigned to convenient pins. The 50 MHz core runs the touch-decoding algorithm while simultaneously handling system control, and the 2.3 V to 3.6 V supply supports both mains-powered and battery-operated panels. A typical implementation scans 8 to 16 electrodes in a round-robin, applying digital filtering to reject noise. The main design consideration is PCB layout: keep touch traces short and away from switching regulators to preserve signal-to-noise ratio.
Recommended
Industrial Sensor Node and Data Logger
The PIC32MX220F032B-50I/SS serves industrial sensor nodes because its 10-bit ADC, multiple timers, and serial interfaces (I2S/SPI, UART) allow direct connection to sensors and communication transceivers. The industrial temperature range of -40 C to +85 C and 2.3 V to 3.6 V supply suit factory-floor environments, and the 50 MHz core provides headroom for filtering and protocol handling. In a typical node, the MCU samples analog sensors via the ADC, timestamps readings with a timer, and logs data to external SPI Flash or transmits over UART. The 32 KB Flash is adequate for a compact protocol stack and data-logging firmware, though designs requiring complex stacks should consider the 128 KB PIC32MX150F128B-50I/SS.
Recommended
Battery-Powered Portable Instrument
The PIC32MX220F032B-50I/SS is a strong candidate for battery-powered instruments because it consumes less than 0.5 mA/MHz and operates down to 2.3 V, allowing direct operation from a single Li-ion cell or two AA cells. The 50 MHz core delivers 83 DMIPS for measurement and display tasks, while the CTMU and ADC provide touch input and analog sensing on-chip. In a typical handheld instrument, the MCU sleeps between measurements, wakes on a timer or touch event, samples the ADC, updates an LCD via the PMP, and returns to sleep. The main trade-off is that 32 KB Flash constrains feature-rich firmware; designs needing more code space can migrate to the pin-compatible PIC32MX150F128B-50I/SS, accepting the loss of USB.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX220F032B-50I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX220F032B-50I/SO | PIC32MX220F032B-50I/ML | PIC32MX150F128B-50I/SS | PIC32MX130F256B-50I/SS | PIC32MX120F032B-50I/SS |
|---|---|---|---|---|---|---|
| Package | 28-pin SSOP (0.209 in) | 28-pin SOIC (0.300 in) | 28-pin QFN (6x6 mm) | 28-pin SSOP (0.209 in) - same | 28-pin SSOP (0.209 in) - same | 28-pin SSOP (0.209 in) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 128 KB | 256 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 32 KB | 16 KB | 8 KB |
| Maximum CPU Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| USB Module | Yes (USB 2.0 full-speed) | Yes (USB 2.0 full-speed) | Yes (USB 2.0 full-speed) | No | No | No |
| 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 | 2.3 V to 3.6 V |
| I2S/SPI Modules | 2 | 2 | 2 | 2 | 2 | 2 |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Integrated USB 2.0 full-speed module (vs PIC32MX150F128B-50I/SS)
- Balanced 32 KB Flash / 8 KB SRAM for cost-sensitive designs (vs PIC32MX130F256B-50I/SS)
- Same-die package variants for assembly flexibility (vs PIC32MX220F032B-50I/ML)
Design Notes
Decouple every VDD pin with a 0.1 uF ceramic capacitor placed as close to the package as possible, and add a 10 uF bulk capacitor near the regulator output. The PIC32MX220F032B-50I/SS has multiple VDD and VSS pins (pins 20 and 28 are VDD; pins 8, 19, and 27 are VSS) and all must be connected. Estimated: at 50 MHz and less than 0.5 mA/MHz, core current is under 25 mA, so a 100 mA LDO is sufficient for the MCU alone; add headroom for I/O and USB loads.
Route the ICSP programming signals (PGECx/PGEDx) as a matched pair to the programming header. The PIC32MX220F032B has more than one PGECx/PGEDx pair; any pair may be used, but the clock and data pins must come from the same pair (for example, PGEC2 with PGED2). Keep the programming traces short and avoid routing them under noisy switching nodes to prevent programming failures.
Do not leave the MCLR pin floating; connect it through a 10 kOhm pull-up to VDD and a 0.1 uF capacitor to VSS for reliable reset. Also verify that the selected package footprint matches the PCB land pattern: the /SS (SSOP), /SO (SOIC), and /ML (QFN) variants are the same die but are not footprint-compatible, so a substitution requires a layout change. Confirm the exact ordering suffix before releasing the board.
Compliance Information
RoHS compliance and lead-free status are indicated by distributor product pages for the PIC32MX220F032B-50I/SS. REACH, halogen-free, and conflict-minerals status were not stated in the retrieved data and are marked unknown.
