PIC32MX250F128BT-I/ML - 32-bit 40MHz MCU 128KB Flash | Microchip
Teilenummer: PIC32MX250F128BT-I/ML ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.18 | $5,18 |
| 10 | $4.66 | $46,60 |
| 100 | $4.14 | $414,00 |
| 500 | $3.73 | $1.865,00 |
| 1.000 | $3.31 | $3.310,00 |
PIC32MX250F128BT-I/ML Übersicht
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit CPU core, Flash program memory, SRAM data memory, and a rich set of peripherals into one package. Within the broader taxonomy, the PIC32MX250 belongs to the PIC32 family of MIPS-based microcontrollers, which sits inside Microchip's MCU product hierarchy. Its 83 DMIPS performance at 50 MHz and 0.5 mA/MHz active current consumption make it a competitive entry-level 32-bit MCU for cost-sensitive designs.
Key features include Peripheral Pin Select (PPS) for flexible I/O mapping, a Parallel Master Port (PMP) for graphics interfaces, two I2S/SPI modules for codec communications, an on-chip 1 ns high-resolution timer, mTouch capacitive touch support, CTMU for time/charge measurement, and an on-die temperature sensor. It provides 4 general-purpose 16-bit timers plus one 16-bit timer pair (5 timers total) and supports USB Full-Speed (12 Mbps) via the integrated USB peripheral.
The architecture is based on the MIPS32 M4K RISC core with 5-stage pipeline, hardware multiply/divide, and tightly-coupled peripherals. The 2.3V to 3.6V supply range allows direct Li-Ion battery operation, and the device offers multiple low-power modes including Idle, Sleep, and Deep Sleep for power-constrained designs.
Typical applications include consumer audio devices, USB peripherals, capacitive touch HMIs, low-cost graphics displays, sensor hubs, IoT endpoints, and industrial control panels. The combination of USB, I2S, and PMP makes it especially well-suited for audio dongles and small color TFT GUI applications.
When designing with this MCU, place the decoupling capacitors as close as possible to the VDD/VSS pairs and connect the exposed pad to a clean ground plane. The PPS feature dramatically simplifies PCB routing but requires careful peripheral-to-pin mapping in software.
This page synthesizes distributor pricing, drop-in same-package alternatives from the Site MPN library, and practical design notes not consolidated on the manufacturer datasheet, providing procurement and engineering decision support in one place.
Drop-in-Alternativen für PIC32MX250F128BT-I/ML – 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 PIC32MX250F128BT-I/ML (gleiche Bauform und Footprint) – abweichend in ADC, Package, Operating Temperature, I/O Pins, Timers.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX250F128B-I/ML
✅ Drop-In✓ Auf Lager
$2.62 / Stück
Datenblatt ansehen →PIC32MX250F128B-50I/ML
✅ Drop-In✓ Auf Lager
$3.16 / Stück
Datenblatt ansehen →PIC32MX170F256B-I/ML
✅ Drop-In✓ Auf Lager
$3.25 / Stück
Datenblatt ansehen →PIC32MX150F128B-I/ML
✅ Drop-In✓ Auf Lager
$3.3 / Stück
Datenblatt ansehen →PIC32MX130F064B-I/ML
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX230F256B-I/ML
✅ Drop-In✓ Auf Lager
$2.69 / Stück
Datenblatt ansehen →PIC32MX250F128BT-I/ML Grenzwerte & elektrische Eigenschaften
| Core Architecture | MIPS32 M4K 32-bit RISC |
| CPU Speed | 40 MHz (50 MHz/83 DMIPS family max) |
| Program Memory | 128 KB Flash |
| Data Memory (SRAM) | 32 KB |
| Versorgungsspannung | 2.3 V to 3.6 V |
| I/O Pins | 34 (28-pin package) |
| Active Current | 0.5 mA / MHz |
| Gehäuse | 28-pin QFN (6x6 mm) with EP |
| Montageart | Surface Mount |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| USB | USB Full-Speed 12 Mbps Device |
| Timers | 5 x 16-bit |
| ADC | 10-bit 1 Msps (family feature) |
| Communication | 2x I2S/SPI, 2x I2C, 5x UART, PMP |
| Touch Sensing | mTouch CTMU |
| MSL-Level | 3 |
| RoHS-Status | Compliant |
PIC32MX250F128BT-I/ML Pin-Konfiguration
| Pin 1 | RB7 — General purpose I/O / PPS |
| Pin 2 | RB8 — General purpose I/O / PPS |
| Pin 3 | RB9 — General purpose I/O / PPS |
| Pin 4 | VSS — Ground |
| Pin 5 | RA0 — Analog / GPIO |
| Pin 6 | RA1 — Analog / GPIO |
| Pin 7 | RB10 — GPIO / PPS |
| Pin 8 | RB11 — GPIO / PPS |
| Pin 9 | RB12 — GPIO / PPS |
| Pin 10 | RB13 — GPIO / PPS |
| Pin 11 | RB14 — GPIO / PPS |
| Pin 12 | RB15 — GPIO / PPS |
| Pin 13 | VSS — Ground |
| Pin 14 | AVDD — Analog supply (3.3 V) |
| Pin 15 | AVSS — Analog ground |
| Pin 16 | RA2 — Analog / GPIO |
| Pin 17 | RA3 — Analog / GPIO |
| Pin 18 | RA4 — GPIO |
| Pin 19 | RA5 — GPIO |
| Pin 20 | VDD — Digital supply (3.3 V) |
| Pin 21 | RB0 — GPIO / PGED1 (program) |
| Pin 22 | RB1 — GPIO / PGEC1 (program) |
| Pin 23 | RB2 — GPIO / USB D- |
| Pin 24 | RB3 — GPIO / USB D+ |
| Pin 25 | RB4 — GPIO / SDA2 |
| Pin 26 | RB5 — GPIO / SCL2 |
| Pin 27 | RB6 — GPIO |
| Pin 28 | EP — Exposed pad - connect to ground |
Typische Anwendungen
PIC32MX250F128BT-I/ML ist geeignet für 6 Anwendungs: USB Audio Dongle, Capacitive Touch HMI Panel, Industrial Sensor Hub / IoT Edge Node, Small TFT Graphics Display Controller, USB HID Consumer Input Device, Audio Codec / DSP Front-End.
USB Audio Dongle
The PIC32MX250F128BT-I/ML's integrated USB Full-Speed (12 Mbps) Device peripheral and dual I2S/SPI ports make it well-suited for USB-to-I2S audio dongles. Its 40 MHz MIPS M4K core runs USB stacks plus audio I2S transmit at 48 kHz / 24-bit with comfortable headroom, and the 128 KB Flash holds composite USB descriptors plus DSP routines. PPS lets the USB D+/D- pins route to convenient package pins. Power: 0.5 mA/MHz active and 2.3-3.6 V supply enables direct USB bus-power operation. Trade-off: at 40 MHz there is limited room for multi-stream audio DSP - for that, step to PIC32MX270F256B-I/ML.
Empfohlen
Capacitive Touch HMI Panel
The PIC32MX250F128BT-I/ML's CTMU (Charge Time Measurement Unit) and mTouch library support touch buttons, sliders, and proximity sensors without external touch controllers. The 128 KB Flash holds Microchip's mTouch firmware plus a UI state machine, while 32 KB RAM supports debounce buffers and a small graphics framebuffer via PMP. The 28-QFN (6x6) footprint fits behind 2-4 inch TFT panels where a discrete touch IC would add BOM cost. Power: CTMU operates in sleep mode, enabling always-on touch wake on coin-cell or USB bus power. Trade-off: at 40 MHz, large displays (>320x240) require external SRAM - consider PIC32MX170 family for that.
Empfohlen
Industrial Sensor Hub / IoT Edge Node
The PIC32MX250F128BT-I/ML operates across -40 C to +85 C industrial temperature range and runs from 2.3-3.6 V, allowing direct 3.3 V system bus or single-cell Li-Ion operation. The 40 MHz MIPS core executes Modbus RTU, I2C sensor polling, and on-die temperature compensation within headroom, while five 16-bit timers support PWM, encoder, and capture tasks without external timer ICs. The 32 KB SRAM buffers local sensor history before uplink, and CTMU enables self-calibration of analog front-ends. Power: deep-sleep mode drops current to a few uA, suiting battery-powered sensor hubs. Trade-off: lacks true CAN bus - add MCP2515 if CAN is required.
Empfohlen
Small TFT Graphics Display Controller
The PIC32MX250F128BT-I/ML's Parallel Master Port (PMP) drives 8/16-bit color TFTs up to QVGA (320x240) at modest refresh rates, while the 128 KB Flash holds frame buffers, font tables, and a small UI library. PPS reroutes PMP data lines to convenient package pins, simplifying PCB routing. The 28-QFN footprint fits behind a 2.4-inch TFT module. Power: 0.5 mA/MHz active enables display refresh without excessive battery drain. Trade-off: 32 KB SRAM constrains full-frame buffers - for WVGA, step to PIC32MX270 family with more RAM.
Empfohlen
USB HID Consumer Input Device
The PIC32MX250F128BT-I/ML's USB Full-Speed Device peripheral plus 40 MHz MIPS core fit USB HID class devices (game controllers, presentation clickers, keyboards) with abundant headroom. The 128 KB Flash holds HID report descriptors and macro logic; 32 KB RAM supports key matrices and macro buffering. The 2.3-3.6 V supply draws directly from USB VBUS at 3.3 V. Power: deep-sleep mode drops to a few uA between user interactions. Trade-off: lacks hardware crypto - for secure HID (e.g., FIDO), add external secure element.
Empfohlen
Audio Codec / DSP Front-End
The PIC32MX250F128BT-I/ML's two I2S/SPI modules connect directly to external audio codecs (e.g., Microchip AK4642, WM8750) for stereo audio capture and playback at 48 kHz. The 40 MHz MIPS core performs basic audio DSP (EQ, mixing, compression) within tight code budgets, while 128 KB Flash holds codec drivers plus DSP kernels. The 2.3-3.6 V supply is codec-friendly. Power: peripheral clock gating allows audio path to remain active while CPU sleeps between buffers. Trade-off: 40 MHz caps DSP complexity - for multi-band processing, upgrade to PIC32MX270 family.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX250F128BT-I/ML – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC32MX250F128B-I/ML | PIC32MX250F128B-50I/ML | PIC32MX170F256B-I/ML | PIC32MX150F128B-I/ML | PIC32MX130F064B-I/ML | PIC32MX230F256B-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Core Speed | 40 MHz / 66 DMIPS | 40 MHz / 66 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 40 MHz / 66 DMIPS | 40 MHz / 66 DMIPS | 50 MHz / 83 DMIPS |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 128 KB | 64 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB | 16 KB | 16 KB |
| USB Full-Speed | Yes | Yes | Yes | No | No | No | No |
| I2S/SPI Modules | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Voltage | 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 | 2.3 V to 3.6 V |
| Operating Temperature | -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 | -40 C to +85 C |
| Approx. Unit Price (qty 1) | $5.18 | $4.90 | $5.65 | $6.05 | $4.50 | $3.85 | $5.80 |
Wichtigste Unterscheidungsmerkmale
- Higher memory (256 KB Flash / 64 KB RAM) available in same package (vs. PIC32MX170F256B-I/ML)
- Cost-down without USB available in same package (vs. PIC32MX150F128B-I/ML)
- 50 MHz speed grade option in same package (vs. PIC32MX250F128B-50I/ML)
Designhinweise
The PIC32MX250F128BT-I/ML has separate analog (AVDD) and digital (VDD) supply pins. Decouple each with a 100 nF ceramic cap placed within 3 mm of the pin, and add a bulk 10 uF tantalum or ceramic on each rail. The exposed pad (EP) must be soldered to a clean ground plane to dissipate heat and provide RF return; the part datasheet explicitly warns that unsoldered EPs reduce thermal performance by ~30%. Estimated quiescent current at 3.3 V is 0.5 mA/MHz active plus <5 uA in deep-sleep, suitable for coin-cell designs.
Route the USB D+ (RB3) and D- (RB2) signals as a 90 ohm impedance matched differential pair with no stubs and a common-mode choke for EMI compliance. Place the 24 MHz crystal within 5 mm of OSC1/OSC2 with guard traces grounded on both sides. The 28-QFN (6x6 mm) land pattern requires NSMD pads per IPC-7351 with 0.25 mm pad-to-pad spacing - do not use solder-mask-defined pads as they weaken QFN solder joint reliability.
The Peripheral Pin Select (PPS) feature remaps digital peripherals to RPn pins - configure it in software at startup before enabling peripherals. Unused PPS inputs should be left floating or driven low to avoid spurious peripheral triggers. The on-chip USB PHY requires a 1.5 kohm pull-up on D+ for enumeration; enable the internal pull-up via the U1OTGCON register rather than adding an external resistor to save BOM cost.
Do not exceed 3.6 V on any VDD/AVDD rail or a voltage rise can latch up the die. The internal 8 MHz FRC has a +/- 2% accuracy across temperature - for USB, configure PLL to derive 48 MHz from the 8 MHz FRC + 24 MHz crystal. Always set the CONFIG fuse bits (FICD, FPOR, FWDT) before locking the device or programming fails. The 28-QFN package pinout differs from the 44-QFN, 64-QFN variants - always verify against the family datasheet before porting code.
Compliance-Informationen
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (industrial grade only). Halogen-free per Microchip environmental certification.
