PIC32MX250F128B-50I/SO - 50MHz 32-bit MCU 128KB Flash | Microchip
Teilenummer: PIC32MX250F128B-50I/SO ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.73 | $5,73 |
| 10 | $5.16 | $51,60 |
| 100 | $4.59 | $459,00 |
| 500 | $4.07 | $2.035,00 |
| 1.000 | $3.55 | $3.550,00 |
PIC32MX250F128B-50I/SO Übersicht
What is a 32-bit microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals (timers, communication interfaces, ADCs) on one die. The PIC32MX family belongs to the broader category of 32-bit microcontrollers within Microchip's PIC product line, sitting between 8-bit PIC16/PIC18 and 32-bit Cortex-M class devices. These MCUs target the embedded control, audio, connectivity, and graphical embedded application space.
Key features include two I2S/SPI modules for codec and serial communications, Peripheral Pin Select (PPS) for flexible pin mapping, a Parallel Master Port (PMP) for graphics interfaces, mTouch capacitive touch support, 1 ns high-resolution time measurement, and on-chip temperature measurement. The device operates from 2.5V/3.3V supplies with 0.5 mA/MHz active current consumption. USB 2.0-compliant full-speed device/host/OTG and advanced analog (10-bit ADC, comparators) round out the peripheral set.
Technically, the PIC32MX250 uses the MIPS32 M4K core with hardware multiply/divide and a 5-stage pipeline. PPS remaps digital peripherals to almost any I/O pin, simplifying PCB layout. The PMP module interfaces to external parallel peripherals or graphics displays. Combined with the 10-bit 1 Msps ADC and dual I2S ports, the part supports audio playback, graphic LCDs, and USB device/host stacks in a single chip.
Typical applications include industrial control panels, USB audio devices, consumer electronics with graphics LCDs, capacitive touch human-machine interfaces (HMIs), and embedded connectivity products. The 128 KB Flash / 32 KB SRAM combination targets mid-range embedded applications that need moderate code and data footprint plus rich peripherals.
When designing with this part, plan the Vcap pin decoupling carefully - the PIC32MX requires a dedicated 10 uF capacitor on the VCAP/VDDCORE pin for internal regulator stability. Also route the 50 MHz signals with controlled impedance if the design uses the high-speed USB or PMP buses.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on the manufacturer datasheet alone - giving procurement and engineering teams a single source for evaluation.
Drop-in-Alternativen für PIC32MX250F128B-50I/SO – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC32MX250F128B-50I/SO (gleiche Bauform und Footprint) – abweichend in Operating Voltage, Package, USB, Core Architecture, ADC.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX150F128B-50I/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$3.18 / Stück
Datenblatt ansehen →PIC32MX230F256B-50I/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC32MX270F256B-50I/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$3.95 / Stück
Datenblatt ansehen →PIC32MX130F064B-I/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC32MX250F128B-50I/SO Grenzwerte & elektrische Eigenschaften
| Core | MIPS32 M4K |
| Core Architecture | 32-bit RISC |
| Maximum CPU Frequency | 50 MHz |
| DMIPS Performance | 83 DMIPS |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage | 2.5 V / 3.3 V |
| Active Current | 0.5 mA/MHz |
| I2S/SPI Modules | 2 |
| USB | USB 2.0 full-speed device/host/OTG |
| Peripheral Pin Select (PPS) | Yes |
| Parallel Master Port (PMP) | Yes |
| mTouch Capacitive Touch | Yes |
| High-Resolution Time Measurement | 1 ns resolution |
| On-Chip Temperature Sensor | Yes |
| Betriebstemperaturbereich | -40C to +105C (industrial) |
| Gehäuse | 28-pin SOIC (SO, 0.300 in / 7.50 mm width) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
PIC32MX250F128B-50I/SO Pin-Konfiguration
| Pin 1 | RA0 — General-purpose I/O / AN0 / CVREF+/ PMA0 |
| Pin 2 | RA1 — General-purpose I/O / AN1 / CVREF-/ PMA1 |
| Pin 3 | RB0 — General-purpose I/O / AN2 / PMA2 / INT0 |
| Pin 4 | RB1 — General-purpose I/O / AN3 / PMA3 / INT1 |
| Pin 5 | RB2 — General-purpose I/O / AN4 / PMA4 / INT2 |
| Pin 6 | RB3 — General-purpose I/O / AN5 / PMA5 / INT3 |
| Pin 7 | RB4 — General-purpose I/O / AN6 / PMA6 / INT4 |
| Pin 8 | RB5 — General-purpose I/O / AN7 / PMA7 / INT5 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VCAP — Internal voltage regulator bypass (10 uF to VSS) |
| Pin 11 | RB6 — General-purpose I/O / ICDPGCLK / PMA8 |
| Pin 12 | RB7 — General-purpose I/O / ICDPGDAT / PMA9 |
| Pin 13 | RB8 — General-purpose I/O / AN8 / PMA10 |
| Pin 14 | RB9 — General-purpose I/O / AN9 / PMA11 / SDA1 |
| Pin 15 | VSS — Ground reference |
| Pin 16 | RC0 — General-purpose I/O / U2CTS |
| Pin 17 | RC1 — General-purpose I/O / U2RTS |
| Pin 18 | RC2 — General-purpose I/O / U2TX |
| Pin 19 | VUSB — USB internal transceiver supply (bypass 0.2 uF) |
| Pin 20 | D+ — USB D+ differential data line |
| Pin 21 | D- — USB D- differential data line |
| Pin 22 | VDD — Positive supply for I/O and logic (2.5 V / 3.3 V) |
| Pin 23 | RC3 — General-purpose I/O / U2RX |
| Pin 24 | RC4 — General-purpose I/O |
| Pin 25 | RC5 — General-purpose I/O |
| Pin 26 | RC6 — General-purpose I/O |
| Pin 27 | RC7 — General-purpose I/O |
| Pin 28 | RA2 — General-purpose I/O / OSC1 / CLKI |
Typische Anwendungen
PIC32MX250F128B-50I/SO ist geeignet für 7 Anwendungs: USB Audio Device, Industrial Control Panel with Graphic LCD, Capacitive Touch HMI, USB Barcode Scanner, IoT Sensor Node with USB Diagnostics, USB MIDI Controller, Data Acquisition Module.
USB Audio Device
The PIC32MX250F128B-50I/SO is well suited for USB audio peripherals such as USB speakers, USB headsets, and USB microphones. Its USB 2.0 full-speed OTG controller supports the standard USB Audio class 1.0 driver stack, eliminating external USB codecs. The two I2S/SPI modules can drive an external DAC like the TI PCM5101A or interface to a stereo ADC, while the 50 MHz core performs software audio mixing and sample-rate conversion in real time. With 128 KB Flash it accommodates the Microchip USB stack plus audio processing libraries, and 32 KB SRAM provides working memory for 16-bit / 44.1 kHz stereo buffers. The 1 ns high-resolution timer enables precise USB SOF synchronization, while mTouch handles play/pause/volume touch buttons on the device chassis. The 28-SOIC package simplifies hand-soldered prototypes.
Empfohlen
Industrial Control Panel with Graphic LCD
The PIC32MX250F128B-50I/SO drives small-to-medium graphic LCDs in industrial control panels through its Parallel Master Port (PMP) interface. PMP supports 8-bit or 16-bit data width and direct connection to common controllers like the ILI9341, SSD1963, or HX8347 without glue logic. The 50 MHz / 83 DMIPS performance is sufficient for animated menus, bar graphs, and character rendering on 320x240 QVGA displays. Peripheral Pin Select (PPS) lets the designer route the PMP data, control, and address lines to any convenient GPIO pin, simplifying PCB routing around the display connector. The industrial -40C to +105C operating range covers factory floor and outdoor installations. With 128 KB Flash, the panel supports multi-language menus and full-color bitmaps in external SPI Flash.
Empfohlen
Capacitive Touch HMI
The PIC32MX250F128B-50I/SO integrates Microchip's mTouch capacitive touch sensing module, enabling cost-effective HMI front panels on appliances, consumer electronics, and industrial controls without dedicated hardware. The mTouch library supports projected-capacitive buttons, sliders, and wheels using the MCU's ADC and comparator peripherals, with noise-immunity algorithms running on the 50 MHz M4K core. PPS allows the touch-sense I/O to be remapped for ergonomically optimized PCB layouts. The 1 ns high-resolution timer captures button-press timestamps and debounces sliding gestures. With 32 KB SRAM, the MCU can drive a small OLED display plus hold multi-touch state. The 28-SOIC package is easy to assemble on standard SMT lines and supports typical consumer price points.
Empfohlen
USB Barcode Scanner
Hand-held USB barcode and QR-code scanners use the PIC32MX250F128B-50I/SO as the main MCU. The USB 2.0 full-speed device controller enumerates as a USB HID Keyboard, transmitting decoded scan data directly to the host PC without driver installation. The 50 MHz core decodes common 1D (Code128, EAN-13, Code39) and 2D (QR, DataMatrix) symbologies in real time using Microchip's SW libraries. The two SPI modules drive a CMOS image sensor and a laser aimer module, while PPS routes the trigger button and LED indicators. The on-chip temperature sensor compensates for ambient drift in the optical front-end. 128 KB Flash fits the USB stack plus decoding library, and the 28-SOIC package supports the slim PCB form factor of handheld scanners.
Empfohlen
IoT Sensor Node with USB Diagnostics
The PIC32MX250F128B-50I/SO serves as a USB-connected IoT sensor node that bridges MEMS sensors (accelerometers, temperature, pressure) to a host computer or cloud gateway. The USB 2.0 OTG controller operates as a CDC virtual COM port or vendor-class USB device for raw sensor streaming at high sample rates. PPS lets the SPI/I2C sensor buses connect to multiple integrated packages simultaneously. The 10-bit 1 Msps ADC supports analog sensor inputs. The 50 MHz / 83 DMIPS performance runs sensor fusion algorithms (complementary filters, basic Kalman) before transmitting over USB. The 32 KB SRAM accommodates circular sensor buffers, while 128 KB Flash fits USB drivers plus sensor processing. Industrial temperature rating allows outdoor deployment.
Empfohlen
USB MIDI Controller
USB MIDI controllers for music production use the PIC32MX250F128B-50I/SO as a low-cost, USB-class-compliant MCU. The USB 2.0 full-speed controller enumerates as a USB MIDI class device - no custom host driver needed on Windows, macOS, or Linux. The 50 MHz M4K core scans up to 64 buttons, 8 rotary encoders, and 16 LEDs at USB MIDI 1 ms update rates with bandwidth to spare. The on-chip 10-bit ADC reads analog potentiometers and faders. PPS remaps the encoder and LED pins for ergonomic PCB layout, and the I2S/SPI ports drive status OLED displays or external DACs for monitoring. 128 KB Flash fits the USB MIDI stack plus button mapping, and 32 KB SRAM supports USB packet buffering. The 28-SOIC package keeps the BOM cost low for prosumer products.
Empfohlen
Data Acquisition Module
The PIC32MX250F128B-50I/SO integrates a 10-bit 1 Msps ADC, dual SPI/I2S interfaces, and USB 2.0 connectivity into a compact 28-SOIC footprint - ideal for USB data-acquisition modules used in test & measurement, laboratory instrumentation, and field logging. The MCU digitizes analog signals at up to 1 Msps and streams samples over USB to the host PC using a vendor-class or bulk endpoint. PPS lets the designer assign SPI/I2C peripherals to any GPIO pin, simplifying PCB layout for analog front-end isolation. The 50 MHz core runs real-time DSP - filtering, decimation, FFT - before transmitting data. 128 KB Flash stores calibration tables, USB stack, and DSP library. Industrial -40C to +105C rating allows outdoor and process-control environments.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX250F128B-50I/SO – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC32MX150F128B-50I/SO | PIC32MX230F256B-50I/SO | PIC32MX270F256B-50I/SO | PIC32MX130F064B-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (SO, 0.300 in) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Frequency | 50 MHz | 50 MHz (same) | 50 MHz (same) | 50 MHz (same) | 40 MHz (-20%) |
| DMIPS | 83 DMIPS | 83 DMIPS | 83 DMIPS | 83 DMIPS | 66 DMIPS |
| Program Flash | 128 KB | 128 KB (same) | 256 KB (+100%) | 256 KB (+100%) | 64 KB (-50%) |
| Data SRAM | 32 KB | 32 KB (same) | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| USB Controller | USB 2.0 FS device/host/OTG | USB 2.0 FS device/host/OTG | USB 2.0 FS device/host/OTG | Enhanced USB 2.0 + hardware crypto | USB 2.0 FS device/host/OTG |
| PMP Parallel Master Port | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40C to +105C (Industrial) | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
Wichtigste Unterscheidungsmerkmale
- Larger Flash within the same 28-SOIC footprint (vs. PIC32MX230F256B-50I/SO)
- Higher CPU speed than the lower-tier PIC32MX1XX series (vs. PIC32MX130F064B-I/SO)
- Hardware crypto not present on PIC32MX2XX baseline (vs. PIC32MX270F256B-50I/SO)
Designhinweise
The PIC32MX250F128B-50I/SO requires a 10 uF low-ESR ceramic capacitor on the VCAP pin (pin 10) for internal 1.8V core regulator stability. Place the capacitor within 0.25 inch of the VCAP pin with a direct, wide ground connection to VSS (pin 9 or 15). Omitting or undersizing the VCAP cap causes erratic resets, brown-out behavior, or code execution failures - this is the most common PIC32 design pitfall. Estimated: at 50 MHz active draw, the core regulator supplies roughly 30 mA. Add a 0.1 uF ceramic in parallel for high-frequency decoupling.
Route the USB D+ and D- differential pair (pins 20, 21) as a 90-ohm differential impedance trace, matched within 150 mil length mismatch, and keep the pair away from switching signals. Place the VUSB 0.2 uF bypass cap (pin 19) within 50 mil of the pin. Place the 12 MHz primary oscillator traces short and symmetric. Estimated: total USB bus capacitance budget is 50 pF; PCB trace plus device pads should stay below 30 pF to allow for the USB connector and cable. Use Microchip's USB PCB layout checklist in datasheet DS60001168L for full guidance.
When using the PMP bus for a graphic LCD or external parallel peripheral, route the 8/16-bit PMP data and address lines together with matched lengths (within 1 inch), keep stub lengths under 50 mil, and add series damping resistors (22-33 ohm) on each PMP output if the bus exceeds 4 inches. PPS lets you choose the most convenient GPIO mapping, but signal-integrity-wise you should still group PMP signals on adjacent pins to minimize skew. Place ground guard vias between PMP and other signal traces.
Common PIC32MX250F128B-50I/SO pitfalls: (1) Failing to configure FSOSCEN before switching to the secondary oscillator causes USB SOF loss - enable FSOSCEN in OSCCON before USB module init. (2) Forgetting the JTAG TDI/TDO pin configuration in code - by default these pins are JTAG-enabled and may not work as GPIO until CFGCONbits.JTAGEN=0. (3) Not unlocking peripheral configuration registers - many PIC32 peripherals require the device config unlock sequence (SYSKEY=0xAA996655, then SYSKEY=0x556699AA) before write access. (4) USB enumeration failures are usually VUSB capacitor or D+/D- trace issues, not code issues.
Compliance-Informationen
RoHS and REACH compliance per Microchip product page. Industrial temperature grade -40C to +105C. Not AEC-Q100 qualified; for automotive AEC-Q100 grade, contact Microchip for PIC32 variants.
