PIC32MX250F128B-V/SP - 32-bit MCU 128KB Flash 32KB RAM 28-SPDIP | Microchip
Référence : PIC32MX250F128B-V/SP ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.78 | $47,80 |
| 100 | $4.12 | $412,00 |
| 500 | $3.55 | $1 775,00 |
| 1 000 | $3.08 | $3 080,00 |
PIC32MX250F128B-V/SP Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, and peripherals. The PIC32MX family belongs to the 32-bit MIPS architecture hierarchy within Microchip's broader product line of microcontrollers and digital signal controllers. These MCUs sit between 8-bit PIC16/PIC18 devices and 32-bit Cortex-M alternatives in terms of cost and performance, and target USB-connected embedded applications that benefit from on-chip Hi-Speed analog and mTouch capacitive touch sensing.
Key features include 0.5 mA/MHz active current consumption, four 16-bit timers plus one 16-bit timer pair, five general purpose 16-bit timers/counters, mTouch capacitive touch hardware, a 1 ns resolution input capture, an on-chip temperature indicator, and JTAG/ICSP debug interfaces. The -V suffix denotes the V temperature grade (operating range -40C to +105C).
The MIPS M4K core with 5-stage pipeline executes most instructions in one cycle and supports 83 DMIPS at 50 MHz; this part is rated 40 MHz operation. USB OTG, PMP, and PPS together allow flexible pin mapping without board rework. 32 KB SRAM supports reasonable RTOS or audio buffer workloads typical of USB audio class or USB HID designs.
Typical applications include USB peripherals (keyboards, mice, audio class, HID), capacitive touch human-machine interfaces, small graphical LCDs via PMP, low-cost audio codec bridges, and embedded control with on-chip USB. Designers should pay attention to the 28-SPDIP through-hole footprint - the same silicon is offered in SOIC-28 and QFN-28 packages for SMD designs. The Vcap pin requires an 8 uF-10 uF low-ESR decoupling capacitor to stabilize the internal 1.8 V core regulator; omitting it causes erratic operation.
Alternatives de remplacement direct pour PIC32MX250F128B-V/SP — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC32MX250F128B-V/SP (même facteur de forme et même empreinte) — différant par Package, ADC, Operating Temperature, USB, Maximum CPU Speed.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC32MX250F128B-I/SP
✅ Remplacement direct✓ En stock
$4.31 / unité
Voir la fiche technique →PIC32MX250F128B-V/SO
✅ Remplacement direct✓ En stock
$3.74 / unité
Voir la fiche technique →PIC32MX250F128BT-V/SO
✅ Remplacement direct✓ En stock
$3.62 / unité
Voir la fiche technique →PIC32MX250F128B-50I/SS
✅ Remplacement direct✓ En stock
$4.1 / unité
Voir la fiche technique →PIC32MX250F128B-50I/ML
✅ Remplacement direct✓ En stock
$3.16 / unité
Voir la fiche technique →PIC32MX230F256B-V/SP
✅ Remplacement direct✓ En stock
$4.1 / unité
Voir la fiche technique →PIC32MX250F128B-V/SP Valeurs maximales et caractéristiques électriques
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 40 MHz (83 DMIPS rated up to 50 MHz on family) |
| Program Memory (Flash) | 128 KB |
| Data Memory (SRAM) | 32 KB |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| I/O Voltage Tolerance | 5 V tolerant digital I/O |
| Number of I/O Pins | 21 (per 28-SPDIP); 34 on package variant |
| USB Peripheral | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 13 channels, 1 Msps |
| Timers | Five 16-bit timers/counters |
| Communication Peripherals | 2x I2C, 2x SPI, 2x I2S, 2x UART, PMP |
| Peripheral Pin Select (PPS) | Yes |
| Boîtier | 28-pin SPDIP (Skinny Plastic DIP, through-hole) |
| Température de fonctionnement | -40C to +105C (V grade) |
| Active Current Consumption | 0.5 mA/MHz (typical) |
Configuration des broches de PIC32MX250F128B-V/SP
| Broche 1 | RA0 — General purpose I/O / IC1 / RTCC alarm |
| Broche 2 | RA1 — General purpose I/O / IC2 |
| Broche 3 | RA2 — General purpose I/O / OC1 / IC3 |
| Broche 4 | RA3 — General purpose I/O / OC2 / IC4 |
| Broche 5 | RA4 — General purpose I/O / OC3 / IC5 |
| Broche 6 | VDD — Positive supply voltage (2.3V to 3.6V) |
| Broche 7 | VSS — Ground reference |
| Broche 8 | RB0 — General purpose I/O / AN0 / PGED1 |
| Broche 9 | RB1 — General purpose I/O / AN1 / PGEC1 |
| Broche 10 | RB2 — General purpose I/O / AN2 |
| Broche 11 | RB3 — General purpose I/O / AN3 |
| Broche 12 | RB4 — General purpose I/O / AN4 |
| Broche 13 | RB5 — General purpose I/O / AN5 |
| Broche 14 | RB6 — General purpose I/O / AN6 / OC4 |
| Broche 15 | RB7 — General purpose I/O / AN7 / OC5 |
| Broche 16 | RB8 — General purpose I/O / AN8 |
| Broche 17 | RB9 — General purpose I/O / AN9 |
| Broche 18 | VUSB — USB internal transceiver supply (3.3V typical) |
| Broche 19 | VBUS — USB bus voltage detect input |
| Broche 20 | D- — USB D- data line |
| Broche 21 | D+ — USB D+ data line |
| Broche 22 | RC1 — General purpose I/O / OC2 |
| Broche 23 | RC2 — General purpose I/O / OC3 |
| Broche 24 | RC3 — General purpose I/O / OC4 |
| Broche 25 | RC4 — General purpose I/O / OC5 |
| Broche 26 | VCAP — Internal 1.8V regulator output - decouple with 8-10 uF low-ESR cap |
| Broche 27 | MCLR — Master clear / reset input (active low) |
| Broche 28 | OSC1/RC0 — Crystal oscillator input or general purpose I/O |
Applications typiques
PIC32MX250F128B-V/SP convient pour 6 applications: USB HID Peripherals (Keyboard, Mouse, Gamepad), Capacitive Touch HMI Panels (mTouch), USB Audio Class Devices (Headset, Microphone), Small Graphic LCDs via Parallel Master Port (PMP), Industrial Sensor Hubs with USB Diagnostic Port, IoT Edge Nodes with USB Connectivity.
USB HID Peripherals (Keyboard, Mouse, Gamepad)
The PIC32MX250F128B-V/SP is ideal for USB HID peripherals because it integrates a USB 2.0 Full-Speed OTG peripheral that implements the device class in hardware without an external PHY. At 40 MHz with 32 KB SRAM, the MCU handles USB polling and HID report generation with ample headroom for matrix scan, debouncing, and lighting control. The V temperature grade (-40C to +105C) suits automotive cabin and industrial HMI environments. Compared to PIC32MX150F128B, the MX250 saves the cost and PCB area of an external USB interface IC. A typical implementation uses PPS to remap USB D+/D- to dedicated pins while freeing the rest for HID matrix scanning.
Recommandé
Capacitive Touch HMI Panels (mTouch)
The PIC32MX250F128B-V/SP integrates Microchip's mTouch capacitive touch hardware, supporting up to 13 channels with charge-time measurement and hardware averaging. Its 40 MHz MIPS M4K core processes touch scanning, debounce, and gesture recognition in real time, while the 10-bit ADC provides backup for slider/wheel position sensing. The 5V-tolerant I/O simplifies interfacing with legacy touch sensors and LEDs on the same panel. Designers often pair the MCU with the PIC32MX1xx/2xx mTouch library and use PPS to assign CTMU channels to free GPIO. The V temperature grade supports outdoor kiosks and industrial control panels where ambient temperatures exceed 85C.
Recommandé
USB Audio Class Devices (Headset, Microphone)
The PIC32MX250F128B-V/SP supports USB Audio Class 1.0 device operation through its integrated USB Full-Speed peripheral, with sufficient CPU bandwidth at 40 MHz to handle 48 kHz/16-bit stereo isochronous endpoints and I2S interfacing to an external codec. The two I2S modules enable simultaneous input and output paths for headsets with microphones. Compared to PIC32MX150, the MX250's USB OTG eliminates an external bridge IC, reducing BOM cost. The 32 KB SRAM accommodates USB ping-pong buffers plus audio jitter compensation; 128 KB Flash stores the USB stack, audio class driver, and DSP-style processing. Designers should use PPS to assign I2S and USB pins for clean PCB routing.
Recommandé
Small Graphic LCDs via Parallel Master Port (PMP)
The PIC32MX250F128B-V/SP's Parallel Master Port (PMP) drives small QVGA or WQVGA TFT LCDs in 8-bit or 16-bit parallel mode, achieving fast refresh rates without DMA. At 40 MHz it sustains ~5 MP/s throughput, sufficient for color 320x240 panels with partial updates. The VQFN/QFN package variants are preferred for graphics designs to free PCB area; the 28-SPDIP used here fits development boards. Combined with mTouch, PMP, and USB, the MX250 powers low-cost graphical HMI terminals, e-meter displays, and medical instrument front panels. The PPS feature reassigns PMP data lines to maximize pin availability.
Recommandé
Industrial Sensor Hubs with USB Diagnostic Port
The PIC32MX250F128B-V/SP serves as a USB-tethered industrial sensor hub, aggregating UART/I2C/SPI sensor data and exposing it to a host PC over USB CDC or vendor class. Its 5V-tolerant I/O interfaces directly to 5V industrial sensors without level shifters, while the 32 KB SRAM holds multi-sensor buffers. The -40C to +105C V temperature grade suits factory floor and outdoor installations. PICkit programming via ICSP allows in-field firmware upgrades without removing the MCU from the board, simplifying maintenance. Compared to PIC32MX270, the MX250 keeps the BOM lean by integrating USB directly.
Recommandé
IoT Edge Nodes with USB Connectivity
The PIC32MX250F128B-V/SP is well-suited for IoT edge nodes that communicate with a host gateway over USB, reading from analog and digital sensors and forwarding formatted telemetry. Its USB OTG supports both device and host roles, enabling USB Wi-Fi dongles or USB mass-storage logging. With 32 KB SRAM and 128 KB Flash, the MCU runs a lightweight command-line parser, sensor scheduling, and USB stack concurrently. The 40 MHz MIPS M4K provides enough DMIPS for FFT pre-processing or anomaly detection on edge data. The -V grade's 105C ceiling supports outdoor enclosures and industrial cabinets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC32MX250F128B-V/SP — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC32MX250F128B-I/SP | PIC32MX250F128B-V/SO | PIC32MX250F128B-50I/SS | PIC32MX230F256B-V/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (through-hole) | 28-SPDIP | 28-SOIC (SMD) | 28-SSOP (SMD) | 28-SPDIP |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 50 MHz | 50 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB Peripheral | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB |
| Operating Temperature | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) |
| Supply Voltage | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V | 2.3V to 3.6V |
| Approx. Unit Price (USD, 1-pc) | $5.20 | $4.95 | $5.10 | $5.45 | $5.80 |
Principaux différenciateurs
- Integrated USB 2.0 Full-Speed OTG peripheral (vs PIC32MX230F256B-V/SP)
- Higher 105C operating temperature ceiling (V grade) (vs PIC32MX250F128B-I/SP)
- Parallel Master Port (PMP) for graphics interfaces (vs PIC32MX150F128B series)
Notes de conception
The PIC32MX250F128B-V/SP requires a low-ESR decoupling capacitor (8-10 uF X5R/X7R ceramic or low-ESR tantalum) on the VCAP pin to stabilize the internal 1.8V core regulator. Without proper decoupling, the MCU exhibits erratic behavior or unexpected resets. Place the VCAP capacitor within 5 mm of the pin with a ground return directly to the nearest VSS pad. Add a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD pin to suppress switching transients.
Route the USB D+ and D- lines as a 90 ohm differential pair with matched length, kept short and away from noisy digital traces. The 5V-tolerant digital I/O pins simplify interfacing to legacy 5V peripherals, but USB lines require 3.3V signal levels - use series ferrite beads and a common-mode choke if the board is exposed to ESD. The MCLR pin needs a 10 kohm pull-up to VDD for normal operation and a 100 nF cap to ground for noise immunity; omit the cap if ICSP fast programming is not required.
Avoid the common mistake of leaving the VBUS pin floating in USB device applications - VBUS must be tied to the USB VBUS rail through a divider or directly to detect plug-in events. The PPS feature cannot reassign analog functions such as ADC inputs or oscillator pins; only digital peripherals (UART, SPI, I2C, OC, IC) are remappable. When migrating from the 40 MHz MX250 to the 50 MHz MX270, verify peripheral clock divisor compatibility - some peripherals max out at 40 MHz on the MX250.
Informations de conformité
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - the V temperature grade (-40C to +105C) is for industrial extended temperature, not automotive Grade 0/1. For AEC-Q100, evaluate PIC32MX570 or PIC32MK families.
