PIC32MX250F128BT-I/ML - 32-bit 40MHz MCU 128KB Flash | Microchip
N.º da peça: PIC32MX250F128BT-I/ML ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para PIC32MX250F128BT-I/ML — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC32MX250F128BT-I/ML (mesmo formato e footprint) — diferindo em ADC, Package, Operating Temperature, I/O Pins, Timers.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC32MX250F128B-I/ML
✅ Drop-In✓ Em estoque
$2.62 / unidade
Ver ficha técnica →PIC32MX250F128B-50I/ML
✅ Drop-In✓ Em estoque
$3.16 / unidade
Ver ficha técnica →PIC32MX170F256B-I/ML
✅ Drop-In✓ Em estoque
$3.25 / unidade
Ver ficha técnica →PIC32MX150F128B-I/ML
✅ Drop-In✓ Em estoque
$3.3 / unidade
Ver ficha técnica →PIC32MX130F064B-I/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC32MX230F256B-I/ML
✅ Drop-In✓ Em estoque
$2.69 / unidade
Ver ficha técnica →PIC32MX250F128BT-I/ML Classificações máximas e características elétricas
| 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 |
| Tensão de alimentação | 2.3 V to 3.6 V |
| I/O Pins | 34 (28-pin package) |
| Active Current | 0.5 mA / MHz |
| Encapsulamento | 28-pin QFN (6x6 mm) with EP |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -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 |
| Nível MSL | 3 |
| Status RoHS | Compliant |
Configuração de pinos do PIC32MX250F128BT-I/ML
| Pino 1 | RB7 — General purpose I/O / PPS |
| Pino 2 | RB8 — General purpose I/O / PPS |
| Pino 3 | RB9 — General purpose I/O / PPS |
| Pino 4 | VSS — Ground |
| Pino 5 | RA0 — Analog / GPIO |
| Pino 6 | RA1 — Analog / GPIO |
| Pino 7 | RB10 — GPIO / PPS |
| Pino 8 | RB11 — GPIO / PPS |
| Pino 9 | RB12 — GPIO / PPS |
| Pino 10 | RB13 — GPIO / PPS |
| Pino 11 | RB14 — GPIO / PPS |
| Pino 12 | RB15 — GPIO / PPS |
| Pino 13 | VSS — Ground |
| Pino 14 | AVDD — Analog supply (3.3 V) |
| Pino 15 | AVSS — Analog ground |
| Pino 16 | RA2 — Analog / GPIO |
| Pino 17 | RA3 — Analog / GPIO |
| Pino 18 | RA4 — GPIO |
| Pino 19 | RA5 — GPIO |
| Pino 20 | VDD — Digital supply (3.3 V) |
| Pino 21 | RB0 — GPIO / PGED1 (program) |
| Pino 22 | RB1 — GPIO / PGEC1 (program) |
| Pino 23 | RB2 — GPIO / USB D- |
| Pino 24 | RB3 — GPIO / USB D+ |
| Pino 25 | RB4 — GPIO / SDA2 |
| Pino 26 | RB5 — GPIO / SCL2 |
| Pino 27 | RB6 — GPIO |
| Pino 28 | EP — Exposed pad - connect to ground |
Aplicações típicas
PIC32MX250F128BT-I/ML é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC32MX250F128BT-I/ML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- 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)
Notas de projeto
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.
Informações de conformidade
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (industrial grade only). Halogen-free per Microchip environmental certification.
