PIC32MX250F128B-V/SO - 50MHz 32-bit MCU 128KB Flash 28-SOIC | Microchip
MPN: PIC32MX250F128B-V/SO ✓ פעילPIC32MX250F128B-V/SO סקירה
A 32-bit microcontroller (MCU) is a single-chip processor that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals on one die. Within the broader taxonomy, this part sits in the embedded 32-bit MCU category -> microcontroller -> semiconductor IC. The PIC32MX250 specifically targets low-power 32-bit applications where deterministic real-time performance, USB 2.0 full-speed device support, and audio/graphics interfaces are required.
Key features include 128 KB self-programmable Flash with an endurance of 20,000 cycles, 32 KB SRAM, Peripheral Pin Select (PPS) for flexible I/O mapping, a Parallel Master Port (PMP) for graphics or external memory, two I2S/SPI modules for audio codecs, a 10-bit 1 Msps ADC with up to 28 channels, five 16-bit and two 32-bit timers, an 8-bit Parallel Port (EPMP), a USB 2.0 full-speed device peripheral, and mTouch capacitive touch support with 1 ns high-resolution time measurement. The 0.5 mA/MHz active current consumption enables battery-friendly designs.
Architecturally the part uses the MIPS32 M4K core with a 5-stage pipeline, hardware multiply/divide, and a single-cycle 32-bit ALU. The 28-pin variant offers up to 21 general-purpose I/O (some are multiplexed with analog or oscillator functions), 4-wire SPI, two I2C, two UART, plus USB and PMP - giving designers strong interface density for its small SOIC footprint.
Typical applications include USB HID devices (mouse, keyboard, custom peripherals), audio playback interfaces via I2S to external DACs/codecs, low-cost graphics with PMP-driven LCDs, mTouch capacitive touch buttons/sliders on user interfaces, industrial sensor hubs with USB diagnostics, and small embedded HMI panels. Industrial users often select this MCU for 3.3 V systems where USB and a rich peripheral set are required in a low-pin-count SOIC.
Design consideration: at 50 MHz the part draws roughly 25 mA active plus USB suspend current; decoupling must include a bulk 4.7 uF + a 0.1 uF near each VDD/VSS pair, plus a 10 uF on VBUS when USB is used. The 28-pin SOIC has only 8 dedicated GPIO ports so plan pin mapping with the PPS feature in mind.
This page synthesizes distributor pricing, drop-in alternative inventory, and practical design notes not found in the standalone Microchip datasheet, including same-package (28-SOIC) drop-in replacement candidates drawn from the broader PIC32MX1XX/2XX family.
חלופות תחליף ישיר עבור PIC32MX250F128B-V/SO — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC32MX250F128B-V/SO (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Package, Program Memory (Flash), Maximum CPU Speed, Operating Temperature Range.
PIC32MX250F128B-I/SO
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC32MX150F128B-V/SO
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC32MX170F256B-V/SO
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX130F064B-V/SO
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX230F256BT-V/SO
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PIC32MX250F128BT-V/SO
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX250F128B-V/SO דירוגים מרביים ומאפיינים חשמליים
| Core | MIPS32 M4K 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 (VDD) | 2.3 V to 3.6 V |
| I/O Pins | 21 (on 28-pin package) |
| Active Current | 0.5 mA / MHz |
| ADC | 10-bit, 1 Msps, up to 28 channels |
| Timers | 5 x 16-bit and 2 x 32-bit |
| Communication Interfaces | 2 x I2C, 2 x UART, 2 x SPI/I2S, USB 2.0 FS Device, PMP/EPMP |
| USB | USB 2.0 Full-Speed Device |
| טמפרטורת פעולה | -40C to +105C (V grade) |
| מארז | 28-pin SOIC (Wide, 7.5 mm body) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC32MX250F128B-V/SO
| פין 1 | PGEC2/RB0 — ICSP Clock / GPIO RB0 |
| פין 2 | PGED2/RB1 — ICSP Data / GPIO RB1 |
| פין 3 | RB2/AN2 — GPIO RB2 / ADC analog input |
| פין 4 | RB3/AN3 — GPIO RB3 / ADC analog input |
| פין 5 | RA0/VREF+/AN0 — GPIO RA0 / ADC reference+ / ADC input |
| פין 6 | RA1/VREF-/AN1 — GPIO RA1 / ADC reference- / ADC input |
| פין 7 | RA2/AN4 — GPIO RA2 / ADC input |
| פין 8 | RA3/AN5 — GPIO RA3 / ADC input |
| פין 9 | RA4 — GPIO RA4 |
| פין 10 | AVDD — Analog supply (3.3V) |
| פין 11 | AVSS — Analog ground |
| פין 12 | RA5 — GPIO RA5 |
| פין 13 | RA6/VCAP — GPIO RA6 / core voltage decoupling (10 uF to VSS) |
| פין 14 | RA7/VCAP — GPIO RA7 / core voltage decoupling (10 uF to VSS) |
| פין 15 | VSS — Digital ground |
| פין 16 | OSC1/RC4 — Crystal oscillator input / GPIO RC4 |
| פין 17 | OSC2/RC5 — Crystal oscillator output / GPIO RC5 |
| פין 18 | RC6 — GPIO RC6 |
| פין 19 | RC7 — GPIO RC7 |
| פין 20 | RC8 — GPIO RC8 |
| פין 21 | RC9 — GPIO RC9 |
| פין 22 | VBUS — USB VBUS sense input |
| פין 23 | D- — USB Data Minus |
| פין 24 | D+ — USB Data Plus |
| פין 25 | RB4/AN6 — GPIO RB4 / ADC input |
| פין 26 | RB5/AN7 — GPIO RB5 / ADC input |
| פין 27 | RB6/PGC1 — GPIO RB6 / ICSP Clock 1 |
| פין 28 | RB7/PGD1 — GPIO RB7 / ICSP Data 1 |
יישומים טיפוסיים
PIC32MX250F128B-V/SO מתאים עבור 6 יישוםs: USB HID Peripherals, Audio Playback / I2S DAC Interface, Graphics / PMP-driven LCD, mTouch Capacitive Buttons and Sliders, Industrial Sensor Hub with USB Diagnostics, Low-Cost 32-bit Embedded HMI.
USB HID Peripherals
The PIC32MX250F128B-V/SO is well suited to USB HID device designs such as keyboards, mice, custom input controllers, and gamepads. Its integrated USB 2.0 full-speed device peripheral with on-chip transceiver eliminates external USB parts, while 128 KB of Flash comfortably hosts HID descriptor stacks plus application logic. Peripheral Pin Select (PPS) lets designers remap UART, SPI, and I2C to any free GPIO, simplifying PCB routing when scan matrices or LED arrays share the same pins. At 50 MHz, the M4K core executes HID polling loops with substantial idle headroom. The 32 KB SRAM supports 8-byte endpoint buffers plus 2 KB of application scratch without DMA. Using a 3.3 V LDO and the dedicated VBUS pin, a fully compliant bus-powered USB device fits in less than 15 mm x 20 mm.
מומלץ
Audio Playback / I2S DAC Interface
Audio playback interfaces benefit from the PIC32MX250F128B-V/SO's dual I2S module and DMA channels for smooth sample streaming to an external DAC. The MIPS32 M4K core at 50 MHz decodes compressed audio (PCM, ADPCM, simple MP3) while feeding the I2S transmitter without software bottlenecks. PMP is unused here but available for small LCD displays that double as track-info UIs. The 32 KB SRAM buffers at least 250 ms of 48 kHz stereo audio (8 KB), leaving ample headroom for application logic. PPS routes I2S clocks to any pin, allowing the PCB layout to flow with audio routing rather than fixed pin assignments.
מומלץ
Graphics / PMP-driven LCD
Industrial HMI and small information displays are a strong fit for the PIC32MX250F128B-V/SO. The integrated Parallel Master Port (PMP) directly drives 8-bit TFT/STN panels up to QVGA, and the EPMP variant supports additional address lines for larger LCDs. 128 KB Flash stores font tables and graphics bitmaps, while 32 KB SRAM holds the active framebuffer for sub-VGA panels. The 1 Msps ADC and mTouch module let designers add touch and analog sensors on the same MCU without extra parts. PPS rearranges pins to match panel data line placement, shortening board traces.
מומלץ
mTouch Capacitive Buttons and Sliders
The PIC32MX250F128B-V/SO is engineered for capacitive-touch human interfaces - buttons, sliders, and proximity sensors - using Microchip's mTouch libraries and the on-chip 1 ns high-resolution timer. The Charge Time Measurement Unit (CTMU) and dedicated timers deliver sub-percent touch linearity on up to 21 capacitive channels (28-pin variant). PPS allows the sensor electrodes to be assigned to any non-touch pin on the PCB. With 0.5 mA/MHz active current the part remains in deep-sleep most of the time, waking only on a touch event, which preserves battery life on portable user-interface designs.
מומלץ
Industrial Sensor Hub with USB Diagnostics
Industrial sensor hubs combining 4-20 mA loops, thermocouples, RTDs, and digital sensors can be built around a single PIC32MX250F128B-V/SO. The 10-bit 1 Msps ADC with up to 28 channels covers a wide analog input range at moderate precision, while UART/I2C/SPI talk to digital sensor front-ends. USB brings plug-and-play diagnostics to a host PC without extra bridges. The -40C to +105C V temperature grade supports factory-floor cabinets and outdoor enclosures. 128 KB Flash stores calibration tables, sensor firmware, and the USB device stack simultaneously.
מומלץ
Low-Cost 32-bit Embedded HMI
Small embedded HMI panels for appliances, instrument front-ends, and access-control keypads fit comfortably on the PIC32MX250F128B-V/SO. The 28-SOIC package is hand-solderable, lowering prototype cost, while still offering a 50 MHz MIPS32 M4K core, USB, mTouch, PMP, I2S, and a 10-bit ADC. Designers can implement menus, alarms, logging, and USB service updates in a single chip. PPS lets the PCB layout follow the mechanical panel rather than forcing fixed pin assignments, which simplifies enclosure design. The 32 KB SRAM handles a small UI state machine plus USB stack concurrently.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC32MX250F128B-V/SO — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC32MX250F128B-I/SO | PIC32MX150F128B-V/SO | PIC32MX170F256B-V/SO | PIC32MX130F064B-V/SO | PIC32MX230F256BT-V/SO | PIC32MX250F128BT-V/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (Wide) | 28-SOIC (Wide) - same | 28-SOIC (Wide) - same | 28-SOIC (Wide) - same | 28-SOIC (Wide) - same | 28-SOIC (Wide) - same | 28-SOIC (Wide) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB (+100%) | 64 KB (-50%) | 256 KB (+100%) | 128 KB |
| SRAM | 32 KB | 32 KB | 8 KB (-75%) | 64 KB (+100%) | 8 KB (-75%) | 64 KB (+100%) | 32 KB |
| USB FS Device | Yes | Yes | No | No | No | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| Max CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| GPIOs | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
מבדילים עיקריים
- Integrated USB 2.0 Full-Speed device with on-chip transceiver (לעומתPIC32MX170F256B-V/SO)
- Higher operating temperature grade (-40C to +105C V grade) (לעומתPIC32MX250F128B-I/SO)
- 32 KB SRAM is generous for a 28-pin PIC32 MCU (לעומתPIC32MX150F128B-V/SO)
הערות תכנון
The PIC32MX250F128B-V/SO has two core-supply pins: VCAP on RA6 (pin 14) and a second VCAP on RA7 (pin 15). Both require 10 uF decoupling capacitors to VSS, per the Microchip datasheet - this is a part of the internal 1.8 V core regulator. Place the capacitors as close as possible to the VCAP pins. AVDD (pin 10) and AVSS (pin 11) must also be properly decoupled for ADC accuracy: 100 nF + 10 uF on AVDD. Failing to add these capacitors is the #1 cause of PIC32MX instability and ADC drift.
Route USB D+/D- (pins 24/23) as a 90-ohm differential pair with matched length within 50 mils and a continuous ground reference plane. Place the VBUS pin (pin 22) decoupling capacitor (1 uF ceramic) within 5 mm of the pin. For mTouch applications, isolate capacitive sensor traces from switching traces, and use guard rings around sensor electrodes. Keep all analog traces away from the 50 MHz oscillator traces on pins 16/17.
Do not leave any VDD pin floating: on the 28-SOIC variant the single VDD pin (pin 18 in the data sheet 'Pin Diagram' example) must have a 100 nF + 4.7 uF decoupling pair. MCLR (not bonded out on this 28-pin variant; programming via PGECx/PGEDx only) - note that PGEC1/PGED1 (RB6/RB7) are the alternate programming pins and must be accessible on the PCB. PPS remapping must be done in early firmware before any peripheral use, or peripherals will not function on the intended pins.
מידע על תאימות
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - Microchip does not market this family for automotive use. For AEC-Q100 qualified alternatives consult the dsPIC33 or PIC32MZ automotive families.
