PIC32MX250F128B-V/SS - 32-bit MCU 128KB Flash 32KB RAM 28-SSOP
MPN: PIC32MX250F128B-V/SS ✓ Hoạt độngPIC32MX250F128B-V/SS Tóm tắt
What is a PIC32 microcontroller? PIC32MX devices are 32-bit MIPS-based microcontrollers from Microchip Technology belonging to the broader PIC MCU family. They occupy the mid-range of Microchip's 32-bit portfolio, sitting between the smaller PIC32MM and the more capable PIC32MZ. Their role in the system hierarchy is: MCU -> 32-bit microcontroller -> embedded processor -> semiconductor. PIC32MX parts integrate high-performance CPU cores with rich peripherals such as USB, I2S, PMP, and ADC, enabling designers to consolidate what previously required multiple ICs onto one MCU.
Key features of the PIC32MX250F128B-V/SS include two I2S/SPI modules for codec and serial communications, Peripheral Pin Select (PPS) for flexible signal routing, a Parallel Master Port (PMP) for graphics interfaces, and mTouch capacitive touch sensing support. The CTMU peripheral provides 1 ns high-resolution time measurement, and an on-chip temperature sensor enables die-level thermal monitoring. The 10-bit ADC offers up to 13 input channels and 1 Msps conversion rate for mixed-signal acquisition.
Architecturally, the device uses a Harvard-style MIPS32 core with single-cycle multiplication, 5-stage pipeline, and a dedicated prefetch cache, achieving 1.5 DMIPS/MHz. Hardware multiply/divide and a single-cycle bit manipulation engine accelerate DSP-style algorithms. The USB 2.0 Full-Speed device controller with on-chip transceiver eliminates external PHY components, while the PMP bus and I2S peripherals enable direct glueless interfaces to TFT displays and audio codecs.
Typical applications include USB HID peripherals, audio processing devices, graphics-display HMI modules, capacitive touch user interfaces, and industrial sensor hubs. The wide temperature range and rich peripheral set make it a strong fit for medical instruments, building automation, and consumer appliances requiring USB connectivity plus user feedback.
When designing with the PIC32MX250F128B-V/SS, ensure the VCAP pin decoupling is implemented exactly as specified (typically 10 µF ceramic) because the internal 1.8 V core regulator requires this for stability. Use the PPS feature to remap peripherals, but verify pin assignments during code development because not every peripheral maps to every I/O.
This page synthesizes XAIPART distributor pricing, drop-in PIC32MX alternatives, and practical design notes that are not consolidated in the Microchip datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX250F128B-V/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC32MX250F128B-V/SS (cùng hình factor và footprint) — khác nhau ở Package, USB, Core Architecture, ADC, Operating Temperature.
PIC32MX250F128B-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX250F128BT-V/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F128B-I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F256B-I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX150F128B-V/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX130F256B-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX250F128B-V/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz (83 DMIPS) |
| Program Memory (Flash) | 128 KB |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| Nhiệt độ hoạt động | -40 °C to +105 °C |
| Active Current Consumption | 0.5 mA/MHz typical |
| Hộp | 28-pin SSOP (5.30 mm) |
| Kiểu lắp đặt | Surface Mount |
| USB | USB 2.0 Full-Speed Device with on-chip transceiver |
| ADC | 10-bit, up to 13 channels, 1 Msps |
| I2S/SPI Modules | 2 |
| PMP (Parallel Master Port) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| CTMU (Charge Time Measurement Unit) | Yes, 1 ns resolution |
| On-chip Temperature Sensor | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX250F128B-V/SS
| Chân 1 | MCLR — Master clear / reset input (active low) |
| Chân 2 | PGED1/AN0/C1INC/RPB0/CTED1/RB0 — Programming data, analog input, IOC, CTMU |
| Chân 3 | PGEC1/AN1/C1INC/RPB1/CTED2/RB1 — Programming clock, analog input, IOC, CTMU |
| Chân 4 | PGED2/AN2/C2INC/RPB2/RB2 — Programming data, analog input, IOC |
| Chân 5 | PGEC2/AN3/C2INC/RPB3/RB3 — Programming clock, analog input, IOC |
| Chân 6 | AN4/C1INB/RPB4/RB4 — Analog input, IOC |
| Chân 7 | AN5/C1INA/RPB5/RB5 — Analog input, IOC |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKI/RC12 — Oscillator crystal input or external clock input |
| Chân 10 | OSC2/CLKO/RC15 — Oscillator crystal output or clock output |
| Chân 11 | VBUS — USB bus power detect input |
| Chân 12 | D- — USB D- data line |
| Chân 13 | D+ — USB D+ data line |
| Chân 14 | VCAP — Internal 1.8V regulator output (decoupling cap) |
| Chân 15 | VDD — Positive supply voltage |
| Chân 16 | RPB15/RB15 — Remappable I/O, IOC |
| Chân 17 | RA0/SDA2/TP13 — I/O, I2C2 SDA, parallel data |
| Chân 18 | RA1/SCL2/TP14 — I/O, I2C2 SCL, parallel data |
| Chân 19 | PGED3/VREF-/CVREF-/AN6/RPB6/RB6 — Programming, VREF-, analog input, IOC |
| Chân 20 | PGEC3/VREF+/CVREF+/AN7/RPB7/RB7 — Programming, VREF+, analog input, IOC |
| Chân 21 | AN8/C1IND/RPB8/RB8 — Analog input, IOC |
| Chân 22 | AN9/C2IND/RPB9/RB9 — Analog input, IOC |
| Chân 23 | TMS/CVREF/AN10/RPB10/RB10 — JTAG TMS, VREF, analog input, IOC |
| Chân 24 | TCK/RPB11/RB11 — JTAG TCK, IOC |
| Chân 25 | TDI/RPB12/RB12 — JTAG TDI, IOC |
| Chân 26 | TDO/RPB13/RB13 — JTAG TDO, IOC |
| Chân 27 | RTCC/RPB14/RB14 — Real-time clock alarm output, IOC |
| Chân 28 | AVDD — Analog positive supply |
Ứng dụng tiêu biểu
PIC32MX250F128B-V/SS phù hợp cho 6 Áp dụngs: USB HID Peripheral Devices, Audio Processing Devices, Graphics HMI with TFT Display, Capacitive Touch User Interfaces, Industrial Sensor Hubs, Consumer Appliance Controllers.
USB HID Peripheral Devices
The PIC32MX250F128B-V/SS is ideal for USB Human Interface Device designs such as keyboards, mice, game controllers, and custom HID peripherals because it integrates a USB 2.0 Full-Speed device controller with on-chip transceiver, eliminating external PHY circuitry. Its 50 MHz MIPS32 core executes HID class drivers plus custom report logic at low latency, and 128 KB Flash fits full USB stacks including composite-device descriptors. The Peripheral Pin Select feature allows D+/D- placement on convenient I/O pins for compact PCB layouts in cable-attached peripherals.
Được đề xuất
Audio Processing Devices
Audio applications benefit from the PIC32MX250F128B-V/SS because it integrates two I2S modules that interface directly to audio codecs such as the WM8731 or SGTL5000, while the 50 MHz core supports 16-bit/48 kHz stereo streams and basic DSP filtering in real time. The 32 KB SRAM buffers roughly 170 ms of stereo 16-bit audio at 48 kHz, and the 10-bit ADC samples microphone or line input. USB device mode enables the part to function as a USB audio class device for headsets and USB microphones with minimal external components.
Được đề xuất
Graphics HMI with TFT Display
Human-Machine Interface designs with small TFT displays use the PIC32MX250F128B-V/SS because the Parallel Master Port (PMP) provides 8-bit or 16-bit parallel bus interfaces to common TFT controllers such as SSD1963 or HX8347 without external glue logic. The 50 MHz core renders widgets at full frame rate, and 32 KB SRAM holds partial frame-buffers for layered graphics. PPS routes display enable, backlight PWM, and touch interrupt to any GPIO, simplifying PCB routing in compact enclosures such as appliance control panels.
Được đề xuất
Capacitive Touch User Interfaces
The PIC32MX250F128B-V/SS is well suited to capacitive touch interfaces because its integrated Charge Time Measurement Unit (CTMU) measures capacitance changes with 1 ns resolution, supporting mTouch buttons, sliders, and proximity sensors. Combined with the 128 KB Flash and PPS, the device scans up to 13 channels in parallel with low CPU overhead. The industrial -40 °C to +105 °C range supports reliable touch operation across automotive dashboards, kitchen appliances, and outdoor kiosks where temperature swings affect sensor baselines.
Được đề xuất
Industrial Sensor Hubs
Industrial sensor hubs leverage the PIC32MX250F128B-V/SS because the device combines 10-bit 1 Msps ADC acquisition, USB connectivity, and I2S/SPI peripherals on a single MCU. Designers can aggregate temperature, pressure, and flow data from external sensors over I2C or SPI, perform filtering on the 50 MHz core, and report aggregated data over USB-CDC or HID. The -40 °C to +105 °C operating range supports outdoor and factory environments, while the 32 KB SRAM caches telemetry bursts before transmission.
Được đề xuất
Consumer Appliance Controllers
Consumer appliance designs use the PIC32MX250F128B-V/SS because it integrates USB for firmware updates or diagnostics, PMP for graphic displays, and CTMU for capacitive touch keypads in a single 28-SSOP device. The 128 KB Flash accommodates full application code plus USB bootloader, and the 32 KB SRAM holds display buffers and protocol state. The wide 2.3 V to 3.6 V supply range operates from rectified AC adapter rails and supports battery-backed standby modes for white-goods and small kitchen appliances.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX250F128B-V/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC32MX250F128B-I/SS | PIC32MX230F128B-I/SS | PIC32MX230F256B-I/SS | PIC32MX150F128B-V/SS | PIC32MX130F256B-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Core | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Maximum CPU Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 40 MHz (-20%) | 40 MHz (-20%) |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB (+100%) | 128 KB | 256 KB (+100%) |
| SRAM | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 32 KB | 16 KB (-50%) |
| USB 2.0 Full-Speed | Yes (on-chip PHY) | Yes | No | No | No | No |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +85 °C (-20 °C upper) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +105 °C | -40 °C to +85 °C |
Bảo phân biệt quan trọng
- Higher industrial temperature range than I-grade sibling (vsPIC32MX250F128B-I/SS)
- Full USB 2.0 Full-Speed with on-chip transceiver (vsPIC32MX230F128B-I/SS)
- Higher 50 MHz CPU speed vs PIC32MX1xx family (vsPIC32MX150F128B-V/SS)
Ghi chú thiết kế
The PIC32MX250F128B-V/SS includes an internal 1.8 V core voltage regulator that requires a 10 µF ceramic decoupling capacitor on the VCAP pin (pin 14). Place this capacitor as close as possible to the VCAP pin with the shortest trace length to ground; X7R or X5R dielectric is recommended. The internal regulator handles all power sequencing; designers must NOT drive VCAP from an external source. Total active current consumption is approximately 0.5 mA/MHz plus peripheral contribution, so at 50 MHz expect 25-30 mA in active mode plus USB and ADC draw.
For USB applications, route the D+ (pin 13) and D- (pin 12) traces as a 90-ohm differential pair with matched length within 150 mils, and keep them away from high-frequency switching signals. Place the USB decoupling capacitor (typically 100 nF) close to the VUSB/VBUS pin. Use a common ground plane under the device and connect digital and analog grounds at a single point near the AGND pin if used. For PMP graphics interfaces, route the 8/16-bit data bus together and shield with ground on both sides.
Three common pitfalls on this device: (1) Forgetting the VCAP decoupling capacitor causes core voltage instability and random resets; (2) Configuring MCLR as an input without a pull-up prevents code execution because MCLR is internally sampled at reset; (3) Failing to configure PPS before toggling alternate peripheral I/O leaves signals mapped to default pins. Always include the configuration bits in code, define a valid configuration pragma, and verify PPS mappings in the Pin Manager tool within MPLAB X IDE before schematic release.
Thông tin tuân thủ
RoHS compliant per Microchip product page. The PIC32MX250 family is not AEC-Q100 qualified; for automotive AEC-Q100 applications, Microchip offers PIC32MX1xx-Q1 series parts.
