PIC32MX250F128B-V/SO - 50MHz 32-bit MCU 128KB Flash 28-SOIC | Microchip
Teilenummer: PIC32MX250F128B-V/SO ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.78 | $57,80 |
| 100 | $4.95 | $495,00 |
| 500 | $4.21 | $2.105,00 |
| 1.000 | $3.74 | $3.740,00 |
PIC32MX250F128B-V/SO Übersicht
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.
Drop-in-Alternativen für PIC32MX250F128B-V/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-V/SO (gleiche Bauform und Footprint) – abweichend in ADC, Package, Program Memory (Flash), Maximum CPU Speed, Operating Temperature Range.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX250F128B-I/SO
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX150F128B-V/SO
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX170F256B-V/SO
✅ Drop-In✓ Auf Lager
$2.78 / Stück
Datenblatt ansehen →PIC32MX130F064B-V/SO
✅ Drop-In✓ Auf Lager
$2.25 / Stück
Datenblatt ansehen →PIC32MX230F256BT-V/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC32MX250F128BT-V/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$3.62 / Stück
Datenblatt ansehen →PIC32MX250F128B-V/SO Grenzwerte & elektrische Eigenschaften
| 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 |
| Betriebstemperatur | -40C to +105C (V grade) |
| Gehäuse | 28-pin SOIC (Wide, 7.5 mm body) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
PIC32MX250F128B-V/SO Pin-Konfiguration
| Pin 1 | PGEC2/RB0 — ICSP Clock / GPIO RB0 |
| Pin 2 | PGED2/RB1 — ICSP Data / GPIO RB1 |
| Pin 3 | RB2/AN2 — GPIO RB2 / ADC analog input |
| Pin 4 | RB3/AN3 — GPIO RB3 / ADC analog input |
| Pin 5 | RA0/VREF+/AN0 — GPIO RA0 / ADC reference+ / ADC input |
| Pin 6 | RA1/VREF-/AN1 — GPIO RA1 / ADC reference- / ADC input |
| Pin 7 | RA2/AN4 — GPIO RA2 / ADC input |
| Pin 8 | RA3/AN5 — GPIO RA3 / ADC input |
| Pin 9 | RA4 — GPIO RA4 |
| Pin 10 | AVDD — Analog supply (3.3V) |
| Pin 11 | AVSS — Analog ground |
| Pin 12 | RA5 — GPIO RA5 |
| Pin 13 | RA6/VCAP — GPIO RA6 / core voltage decoupling (10 uF to VSS) |
| Pin 14 | RA7/VCAP — GPIO RA7 / core voltage decoupling (10 uF to VSS) |
| Pin 15 | VSS — Digital ground |
| Pin 16 | OSC1/RC4 — Crystal oscillator input / GPIO RC4 |
| Pin 17 | OSC2/RC5 — Crystal oscillator output / GPIO RC5 |
| Pin 18 | RC6 — GPIO RC6 |
| Pin 19 | RC7 — GPIO RC7 |
| Pin 20 | RC8 — GPIO RC8 |
| Pin 21 | RC9 — GPIO RC9 |
| Pin 22 | VBUS — USB VBUS sense input |
| Pin 23 | D- — USB Data Minus |
| Pin 24 | D+ — USB Data Plus |
| Pin 25 | RB4/AN6 — GPIO RB4 / ADC input |
| Pin 26 | RB5/AN7 — GPIO RB5 / ADC input |
| Pin 27 | RB6/PGC1 — GPIO RB6 / ICSP Clock 1 |
| Pin 28 | RB7/PGD1 — GPIO RB7 / ICSP Data 1 |
Typische Anwendungen
PIC32MX250F128B-V/SO ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX250F128B-V/SO – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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 |
Wichtigste Unterscheidungsmerkmale
- Integrated USB 2.0 Full-Speed device with on-chip transceiver (vs. PIC32MX170F256B-V/SO)
- Higher operating temperature grade (-40C to +105C V grade) (vs. PIC32MX250F128B-I/SO)
- 32 KB SRAM is generous for a 28-pin PIC32 MCU (vs. PIC32MX150F128B-V/SO)
Designhinweise
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.
Compliance-Informationen
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.
