PIC32MX254F128BT-V/SO - 32-bit MCU 128KB Flash USB 28-SOIC | Microchip
Teilenummer: PIC32MX254F128BT-V/SO ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.36 | $43,60 |
| 100 | $3.62 | $362,00 |
| 500 | $3.1 | $1.550,00 |
| 1.000 | $2.75 | $2.750,00 |
PIC32MX254F128BT-V/SO Übersicht
What is a PIC32MX? A PIC32MX is a 32-bit flash microcontroller from Microchip based on the MIPS32 M4K Harvard architecture, positioned between 8-bit PIC16/PIC18 devices and 32-bit ARM Cortex-M parts. PIC32MX parts integrate rich peripherals (ADC, comparators, CTMU, RTCC, PMP), multiple communication interfaces (UART, SPI, I2C, USB, CAN depending on variant), and ultra-low-power sleep modes under the XLP banner, making them suitable for cost-sensitive connected applications.
Key features of the PIC32MX254F128BT-V/SO include 128KB single-cycle Flash with live update support, 32KB SRAM, 4KB EEPROM emulation area in Flash, 21 available I/O lines with mappable interrupt-on-change, three analog comparators with programmable reference, a 10-bit 1 Msps ADC with up to 13 input channels, a Charge Time Measurement Unit (CTMU) for capacitive touch and time-of-flight measurements, a Real-Time Clock and Calendar (RTCC) module, and a Full-Speed USB 2.0 controller with transceiver.
The PIC32MX254F128BT-V/SO architecture uses a 32-bit RISC core with 5-stage pipeline, single-cycle multiply, hardware divide, and 32-bit-wide instruction fetch. The device supports 1.8V to 3.6V single-supply operation with on-chip regulators and the proprietary nanoWatt XLP feature set (Sleep, Deep Sleep, Retention modes) for battery-driven applications. Wide 3.3V tolerance on digital I/O simplifies mixed-voltage system integration with sensors and radios.
Typical applications include USB human-interface devices (HIDs), capacitive touch key panels, sensor hub MCUs, automotive body controllers and HMI clusters (AEC-Q100 qualified), home appliances with low-power standby, industrial sensor transmitters, and any low-power connected embedded system. The CTMU module adds analog signal conditioning for proximity, flow, and temperature sensing.
When designing with this part, plan for proper decoupling (0.1 uF plus bulk ceramic per VDD/AVDD pair), use the internal 8 MHz RC with PLL to reach 72 MHz, and consider the 28-pin SOIC's lower pin density when many peripherals are required - migrate to PIC32MX254F128BT-I/PT (44-pin TQFP) or PIC32MX254F128BT-I/PF (100-pin TQFP) family members if more I/O is needed.
This page synthesizes distributor pricing, pin-compatible alternatives from Microchip's own portfolio, and practical design notes not found in the manufacturer datasheet. Cross-brand drop-in equivalents are limited for this part because the MIPS32 core and Microchip peripheral register set have no second-source manufacturer.
Drop-in-Alternativen für PIC32MX254F128BT-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 PIC32MX254F128BT-V/SO (gleiche Bauform und Footprint) – abweichend in ADC, Package, I/O Pins, Operating Temperature, USB.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX254F128BT-I/SO
✅ Drop-In✓ Auf Lager
$2.68 / Stück
Datenblatt ansehen →PIC32MX254F128BT-V/MM
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX250F128B-V/SO
✅ Drop-In✓ Auf Lager
$3.74 / Stück
Datenblatt ansehen →PIC32MX150F128BT-V/SO
✅ Drop-In✓ Auf Lager
$3.81 / Stück
Datenblatt ansehen →PIC32MX170F256B-V/SO
✅ Drop-In✓ Auf Lager
$2.78 / Stück
Datenblatt ansehen →PIC32MX254F128BT-V/SO Grenzwerte & elektrische Eigenschaften
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 72 MHz |
| Program Flash | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Supply Voltage Range | 2.3 V to 3.6 V |
| I/O Pins | 21 (28-pin SOIC) |
| ADC | 10-bit, 1 Msps, up to 13 channels |
| Comparators | 3 with programmable reference |
| CTMU Module | Yes (capacitive touch, time measurement) |
| RTCC Module | Yes (Real-Time Clock and Calendar) |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Communication Peripherals | UART, SPI, I2C, USB |
| Gehäuse | 28-pin SOIC (SO) |
| Betriebstemperaturbereich | -40C to +105C (automotive grade V) |
| AEC-Q100 Qualification | Yes (automotive grade) |
| Montageart | Surface Mount (Tape & Reel) |
| RoHS-Status | Compliant |
PIC32MX254F128BT-V/SO Pin-Konfiguration
| Pin 1 | RA0 — GPIO / analog input AN0 |
| Pin 2 | RA1 — GPIO / analog input AN1 |
| Pin 3 | RB0 — GPIO / PGED1 (programming data) |
| Pin 4 | RB1 — GPIO / PGEC1 (programming clock) |
| Pin 5 | RB2 — GPIO / analog input AN4 |
| Pin 6 | RB3 — GPIO / analog input AN5 |
| Pin 7 | VSS — Ground |
| Pin 8 | RB4 — GPIO / SDA2 |
| Pin 9 | RB5 — GPIO / SCL2 |
| Pin 10 | RB6 — GPIO / ICSP PGD |
| Pin 11 | RB7 — GPIO / ICSP PGC |
| Pin 12 | RB8 — GPIO |
| Pin 13 | RB9 — GPIO / USB D- |
| Pin 14 | VDD — Positive supply (2.3V-3.6V) |
| Pin 15 | RB10 — GPIO / USB D+ |
| Pin 16 | RB11 — GPIO |
| Pin 17 | RB12 — GPIO / analog input AN12 |
| Pin 18 | RB13 — GPIO / analog input AN11 |
| Pin 19 | RB14 — GPIO / analog input AN10 |
| Pin 20 | RB15 — GPIO / analog input AN9 |
| Pin 21 | VSS — Ground |
| Pin 22 | RC0 — GPIO |
| Pin 23 | RC1 — GPIO |
| Pin 24 | RC2 — GPIO |
| Pin 25 | RC3 — GPIO |
| Pin 26 | RC4 — GPIO |
| Pin 27 | RC5 — GPIO |
| Pin 28 | AVDD — Analog positive supply |
Typische Anwendungen
PIC32MX254F128BT-V/SO ist geeignet für 7 Anwendungs: USB Human Interface Devices, Automotive Body Electronics, Capacitive Touch Key Panels, Industrial Sensor Hubs, Battery-Powered IoT Endpoints, Home Appliance User Interface, USB Audio Class Device.
USB Human Interface Devices
The PIC32MX254F128BT-V/SO's integrated Full-Speed USB 2.0 controller with on-chip transceiver eliminates the need for an external PHY, making it a cost-effective choice for USB HID peripherals like keyboards, mice, game controllers, and custom joysticks. The 72 MHz MIPS32 M4K core executes USB polling and HID report processing with deterministic timing, while 32 KB SRAM comfortably holds USB stack buffers, HID reports, and scan matrices for large keyboards. AEC-Q100 Grade 2 qualification supports in-vehicle USB peripherals (steering wheel controls, headrest USB hubs).
Empfohlen
Automotive Body Electronics
The PIC32MX254F128BT-V/SO's AEC-Q100 Grade 2 qualification, -40C to +105C operating range, and full Microchip automotive-grade documentation make it suitable for non-safety body controllers such as door modules, mirror adjusters, lighting controllers, and seat-position memory. Its low Deep Sleep current (sub-1 uA with RTCC) preserves battery life in always-parked vehicles, while the CTMU drives capacitive touch surfaces for backlit switches. The 28-SOIC's wide body simplifies automotive PCBA inspection and rework versus fine-pitch QFN parts.
Empfohlen
Capacitive Touch Key Panels
The PIC32MX254F128BT-V/SO integrates the Charge Time Measurement Unit (CTMU) which converts capacitive changes to digital counts with sub-pF resolution, enabling robust capacitive touch key, slider, and proximity sensing without external analog front ends. Up to 13 ADC channels and 21 I/O lines are sufficient for 12-16-key panels plus RGB LED drivers. The 72 MHz core runs custom debounce and gesture algorithms in real time, while nanoWatt XLP Sleep mode wakes on touch event for battery-powered remote controls and IoT wall switches.
Empfohlen
Industrial Sensor Hubs
The PIC32MX254F128BT-V/SO's USB Full-Speed capability, RTCC with calendar, and 21 I/O lines support multi-sensor aggregation hubs that read temperature, pressure, and humidity sensors over I2C/SPI and stream data to a host PC via USB CDC. The 10-bit 1 Msps ADC handles analog sensor inputs at high sample rates, and 32 KB SRAM supports buffering for wireless gateway passthrough. Deep Sleep mode with RTCC wake-up delivers multi-year battery life for unattended wireless sensor nodes.
Empfohlen
Battery-Powered IoT Endpoints
The PIC32MX254F128BT-V/SO's nanoWatt XLP modes (Deep Sleep with RTCC at ~600 nA typical) make it suitable for battery-powered IoT endpoints that spend most of their life in sleep and wake periodically to report sensor data or react to interrupts. The wide 2.3V-3.6V supply range supports direct CR2032 or 2xAA battery operation. USB support enables the same hardware to be re-flashed and field-upgraded via bootloader, reducing service costs across an IoT deployment fleet.
Empfohlen
Home Appliance User Interface
The PIC32MX254F128BT-V/SO drives user-interface panels on washing machines, refrigerators, microwaves, and air-conditioners: its CTMU scans capacitive touch buttons, comparators detect key-press feedback, timers drive PWM beeps, and UART/SPI connects to the main appliance controller. AEC-Q100 qualification is over-spec for appliances but guarantees long-term reliability. The 28-SOIC's wide body eases hand-soldering for low-volume appliance variants and simplifies inspection in low-mix production lines.
Empfohlen
USB Audio Class Device
The PIC32MX254F128BT-V/SO's Full-Speed USB controller and 32 KB SRAM can implement a USB Audio Class 1.0 device that streams 16-bit / 48 kHz mono or stereo audio to a host PC, useful in USB headsets, USB microphones, and USB audio DACs where bill-of-material cost matters. The 72 MHz core provides enough headroom for USB isochronous transfers and audio DSP. PIC32MX254F128BT-V/SO does not include a high-performance DAC, so external PCM5102A or SGTL5000 codecs are typical companions.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX254F128BT-V/SO – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC32MX254F128BT-I/SO | PIC32MX254F128BT-V/MM | PIC32MX250F128B-V/SO | PIC32MX150F128BT-V/SO | PIC32MX170F256B-V/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Core / Max Clock | MIPS32 M4K / 72 MHz | MIPS32 M4K / 72 MHz | MIPS32 M4K / 72 MHz | MIPS32 M4K / 72 MHz | MIPS32 M4K / 50 MHz (-30%) | MIPS32 M4K / 72 MHz |
| Flash / SRAM | 128 KB / 32 KB | 128 KB / 32 KB | 128 KB / 32 KB | 128 KB / 32 KB | 128 KB / 32 KB | 256 KB / 64 KB (upgrade) |
| USB | Full-Speed USB 2.0 OTG/Device/Host | Full-Speed USB 2.0 OTG | Full-Speed USB 2.0 OTG | No USB | Full-Speed USB 2.0 | No USB |
| Temperature Range | -40C to +105C (automotive V) | -40C to +85C (industrial) | -40C to +105C (automotive V) | -40C to +105C (automotive V) | -40C to +105C (automotive V) | -40C to +105C (automotive V) |
| AEC-Q100 | Qualified (Grade 2) | Not qualified (industrial) | Qualified (Grade 2) | Qualified (Grade 2) | Qualified (Grade 2) | Qualified (Grade 2) |
| Unit Price (qty 1, USD) | $4.85 | $4.10 (lower, industrial) | $4.85 (same) | $3.50 (lower, no USB) | $4.20 (similar) | $5.30 (higher, more Flash) |
Wichtigste Unterscheidungsmerkmale
- AEC-Q100 Grade 2 qualification with Full-Speed USB (vs. PIC32MX254F128BT-I/SO)
- Integrated Full-Speed USB 2.0 with on-chip transceiver (vs. PIC32MX250F128B-V/SO)
- 72 MHz core vs 50 MHz on older generation (vs. PIC32MX150F128BT-V/SO)
Designhinweise
The PIC32MX254F128BT-V/SO has separate VDD (pin 14) and AVDD (pin 28) digital and analog supply pins. Place a 0.1 uF ceramic bypass capacitor within 2 mm of each VDD/AVDD pin and add a 4.7 uF bulk capacitor on each rail. The analog supply should be filtered with a ferrite bead or 10 ohm resistor from VDD if analog accuracy is critical - this isolates ADC reference noise from digital switching.
For USB Full-Speed designs, route the D+ (RB10) and D- (RB9) traces as a 90-ohm differential pair with length matching within 2 mm. Keep total trace length under 25 mm, route over a continuous ground plane, and place the 15 kohm pull-down on D- as close to the IC as possible. The 28-SOIC wide body simplifies hand-rework but is large for compact USB dongles - evaluate the 28-QFN (MM) variant for space-constrained designs.
Do not confuse the V (automotive -40C to +105C) suffix with Vdd. The V suffix on PIC32MX MPNs is a Microchip automotive temperature designator, NOT a voltage. Also note that the PIC32MX254F128BT does NOT have a CAN peripheral - use PIC32MX5xx or PIC32MX7xx family members if CAN is required. For designs that need USB and CAN together, evaluate the PIC32MX575 or PIC32MX795 family.
Place the ICSP programming pins (PGEC1/RB1 and PGED1/RB0) on accessible test pads or header pins to allow in-circuit programming and debugging. The PIC32MX254F128BT-V/SO uses 3.3V ICSP, so PGEC/PGED are NOT 5V tolerant - design any production programmer interface with 3.3V level translation. Add a small (100 ohm series) resistor on PGC and PGD for production-line EMI isolation.
Estimated: with all 21 I/O pins switching simultaneously at 25 MHz (a worst case 3.3V CMOS load), the simultaneous switching noise (SSN) on VDD can exceed 100 mV without proper decoupling. Place 0.1 uF ceramic capacitors on every I/O bank and add a 1 uF bulk capacitor near the MCU. Enable slew-rate limiting on output pins driving long traces to reduce di/dt-induced ground bounce.
Compliance-Informationen
AEC-Q100 Grade 2 qualified (automotive V suffix). RoHS compliant per Microchip product page. Lead-free (Pb-free) and halogen-free per datasheet packaging information. Conflict-minerals compliance declared per Microchip corporate policy.
