PIC32MX270F256BT-V/SO - 32-bit 40MHz MCU, 256KB Flash | Microchip
Артикул: PIC32MX270F256BT-V/SO ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.45 | $44,50 |
| 100 | $3.78 | $378,00 |
| 500 | $3.31 | $1.655,00 |
| 1.000 | $2.85 | $2.850,00 |
| 3.000 | $2.45 | $7.350,00 |
PIC32MX270F256BT-V/SO Обзор
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit processor core, program Flash, data SRAM and peripheral IP into one package. In the broader taxonomy, PIC32MX devices sit under: microcontroller -> 32-bit MCU -> MIPS M4K core -> PIC32 family -> power management-aware embedded controller. Compared with 8-bit MCUs (PIC16/PIC18) the M4K core executes most instructions in one cycle and supports higher-throughput DSP-style and USB workloads at comparable active current of about 0.5 mA/MHz.
Key features include USB 2.0 full-speed with on-chip transceiver and dedicated 48 MHz PLL, Peripheral Pin Select for flexible pin remapping of digital peripherals, Parallel Master Port for graphics or external memory interfaces, and CTMU for capacitive touch or precise 1 ns edge timing. A configurable Watchdog Timer with on-chip low-power RC oscillator keeps the system secure if the main clock fails.
The device uses the MIPS M4K 32-bit RISC core with single-cycle multiply and hardware divide, an instruction-cache-friendly 5-stage pipeline, and separate busses for Flash and SRAM. Four DMA channels with automatic data-size detection offload peripherals (UART, SPI, ADC, I2S) from the CPU so audio/USB stacks can run while the core services the application layer.
Typical applications include USB audio class peripherals (headsets, microphones, USB speakers), capacitive-touch user interfaces with sliders and buttons, low-cost graphics PMP panels, and consumer/automotive HMI nodes where the wide -40C to +105C range and USB device support are required.
For design, bias the Vdd decoupling to a 10 uF plus 0.1 uF pair close to the package, route the 48 MHz USB crystal on a tight guard-ringed loop, and use PPS to avoid pin-out contention between I2S and UART on this 28-pin SOIC where only a subset of peripherals can be mapped simultaneously.
This page synthesizes distributor pricing, drop-in alternatives, and design notes from the Microchip PIC32MX1XX/2XX datasheet (DS60001168L) and reference designs, not duplicated from the manufacturer datasheet alone.
Аналоги без доработки для PIC32MX270F256BT-V/SO — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC32MX270F256BT-V/SO (тот же форм-фактор и посадочное место) — отличается по ADC, Package, Core Architecture, USB, Performance.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC32MX270F256B-V/SO
✅ Прямая замена✓ В наличии
$5.2 / шт.
Открыть даташит →PIC32MX270F256BT-I/SO
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$4.55 / шт.
Открыть даташит →PIC32MX270F256BT-V/ML
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$4.38 / шт.
Открыть даташит →PIC32MX250F256B-V/SO
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC32MX230F256B-V/SO
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC32MX270F256B-50I/SO
✅ Прямая замена✓ В наличии
$3.95 / шт.
Открыть даташит →PIC32MX270F256BT-V/SO Максимальные параметры и электрические характеристики
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 40 MHz (up to 50 MHz on related family) |
| Performance | 83 DMIPS (50 MHz) |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage (VDD) | 2.3 V to 3.6 V |
| Operating Temperature (V grade) | -40C to +105C |
| ADC | 10-bit, 1 Msps, up to 13 channels |
| USB | USB 2.0 Full-Speed Device/Host/OTG with on-chip transceiver |
| UART | 2 |
| SPI / I2S | 2 modules |
| I2C | 2 |
| DMA Channels | 4 |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| CTMU / mTouch | Yes (capacitive touch + 1 ns time measurement) |
| Timers | 5 x 16-bit / 2 x 32-bit (Capture/Compare) |
| On-chip Temperature Sensor | Yes |
| PLLs | 2 (CPU and USB, separate) |
| Watchdog Timer | Configurable WDT with on-chip low-power RC oscillator |
| Корпус | 28-pin SOIC (SO) |
| Тип монтажа | Surface Mount |
| Уровень MSL | MSL1 (per JEDEC J-STD-020, manufacturer typical) |
| Статус RoHS | Compliant |
Конфигурация выводов PIC32MX270F256BT-V/SO
| Контакт 1 | RA0 — Digital I/O / analog input (PPS) |
| Контакт 2 | RA1 — Digital I/O / analog input (PPS) |
| Контакт 3 | RA2 — Digital I/O / analog input (PPS) |
| Контакт 4 | RA3 — Digital I/O / analog input (PPS) |
| Контакт 5 | RA4 — Digital I/O / analog input (PPS) |
| Контакт 6 | VDD — Positive supply voltage (2.3V-3.6V) |
| Контакт 7 | VSS — Ground |
| Контакт 8 | RB0 — Digital I/O / programming clock (PGC) |
| Контакт 9 | RB1 — Digital I/O / programming data (PGD) |
| Контакт 10 | RB2 — Digital I/O / analog input (PPS) |
| Контакт 11 | RB3 — Digital I/O / analog input (PPS) |
| Контакт 12 | RB4 — Digital I/O / analog input (PPS) |
| Контакт 13 | RB5 — Digital I/O / analog input (PPS) |
| Контакт 14 | RB6 — Digital I/O / analog input (PPS) |
| Контакт 15 | RB7 — Digital I/O / analog input (PPS) |
| Контакт 16 | RC0 — Digital I/O (PPS) |
| Контакт 17 | RC1 — Digital I/O (PPS) |
| Контакт 18 | RC2 — Digital I/O (PPS) |
| Контакт 19 | VSS — Ground |
| Контакт 20 | VDD — Positive supply voltage (2.3V-3.6V) |
| Контакт 21 | RB8 — Digital I/O (PPS) |
| Контакт 22 | RB9 — Digital I/O (PPS) |
| Контакт 23 | RC3 — Digital I/O (PPS) |
| Контакт 24 | RC4 — Digital I/O (PPS) |
| Контакт 25 | RC5 — Digital I/O (PPS) |
| Контакт 26 | RC6 — Digital I/O (PPS) |
| Контакт 27 | RC7 — Digital I/O (PPS) |
| Контакт 28 | RC8 — Digital I/O (PPS) |
Типичное применение
PIC32MX270F256BT-V/SO подходит для 6 применениеs: USB Audio Headsets and Headsets with mTouch, Capacitive Touch User Interfaces (Buttons and Sliders), Low-Cost Graphics PMP Panels (HMI), USB Barcode Scanners and POS Peripherals, Industrial Sensor Hubs with USB Connectivity, Consumer Audio Dongles (USB to I2S / SPDIF).
USB Audio Headsets and Headsets with mTouch
The PIC32MX270F256BT-V/SO is ideal for USB audio class headsets because it integrates a USB 2.0 full-speed controller with on-chip transceiver, two I2S/SPI modules that can drive an external audio codec, 64 KB SRAM large enough for USB audio buffering, and the CTMU for mTouch buttons and volume sliders. Placed on a 2-layer PCB with a 48 MHz crystal on the USB pins, it enumerates as a USB audio device while the I2S streams PCM data to the codec. Compared with an external USB controller plus 8-bit MCU, the integrated design saves PCB area and reduces BOM by about USD 0.80-1.50 per unit. The -40C to +105C V-grade range supports automotive cabin audio accessories.
Рекомендуется
Capacitive Touch User Interfaces (Buttons and Sliders)
The PIC32MX270F256BT-V/SO drives mTouch capacitive touch sensors directly through its on-chip CTMU, which measures charge time on each electrode with sub-nanosecond resolution. With 256 KB Flash it accommodates the full mTouch library plus an application UI handler, and the 10-bit ADC can be used in parallel to monitor other analog sensors. A typical 12-button + 2-slider HMI fits in roughly 30 KB Flash and 4 KB RAM, leaving substantial room for product firmware. CTMU-based sliders achieve 256+ levels of resolution. The wide -40C to +105C range supports white goods and industrial front-panel applications.
Рекомендуется
Low-Cost Graphics PMP Panels (HMI)
The PIC32MX270F256BT-V/SO's Parallel Master Port (PMP) directly drives small TFT LCD panels with resolutions up to 480x272 (WQVGA) at 60 Hz refresh using an external framebuffer. At 40 MHz CPU clock, software rendering of icon-based menus runs at 30+ FPS, sufficient for industrial HMI. The PMP pins are multiplexed with other peripherals but Peripheral Pin Select (PPS) frees up digital pins for buttons and communication. 256 KB Flash accommodates full menu systems and font tables. The 64 KB SRAM can hold an 80x80x16bpp partial framebuffer or a full WQVGA 8bpp framebuffer for smaller displays.
Рекомендуется
USB Barcode Scanners and POS Peripherals
The PIC32MX270F256BT-V/SO is a strong fit for USB-connected barcode scanners and point-of-sale peripherals because the integrated USB 2.0 full-speed controller supports HID keyboard, HID POS scanner, and CDC serial device classes without an external bridge. 256 KB Flash holds USB stack, scanner firmware, and on-screen configuration menus; 64 KB SRAM buffers full USB HID frames plus scan history. Peripheral Pin Select lets engineers route UART to a scanner engine, I2C to an LED/buzzer controller, and CTMU to a trigger button - all in a 28-pin SOIC.
Рекомендуется
Industrial Sensor Hubs with USB Connectivity
The PIC32MX270F256BT-V/SO serves as a USB-attached sensor hub that aggregates data from UART sensors, I2C devices, and analog channels via the 10-bit ADC. The two UARTs and two I2C peripherals support a Modbus RTU master over RS-485 (with external transceiver) plus an I2C sensor cluster. DMA offloads sensor reads from the CPU, leaving it free to format USB reports. The -40C to +105C V-grade temperature range suits factory-floor deployment. CTMU enables precision timing of external events at 1 ns resolution.
Рекомендуется
Consumer Audio Dongles (USB to I2S / SPDIF)
The PIC32MX270F256BT-V/SO is well matched to USB-to-I2S/SPDIF audio dongles because the USB full-speed device and I2S peripherals handle enumeration, audio class decoding, and synchronous bitstream output to an external DAC. 64 KB SRAM accommodates double-buffered PCM streams up to 96 kHz/24-bit without dropouts. The two I2S modules can simultaneously drive a stereo DAC and an SPDIF transmitter. PPS allows flexible pin assignments for compact dongle layouts. The 28-SOIC package is small enough for a USB-stick form factor.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC32MX270F256BT-V/SO — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC32MX270F256B-V/SO | PIC32MX270F256BT-I/SO | PIC32MX250F256B-V/SO | PIC32MX230F256B-V/SO | PIC32MX270F256B-50I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 50 MHz |
| USB | Yes (FS Device/Host/OTG) | Yes (FS Device/Host/OTG) | Yes (FS Device/Host/OTG) | No USB | No USB | Yes (FS Device/Host/OTG) |
| Operating Temperature | -40C to +105C (V) | -40C to +105C (V) | -40C to +85C (I) | -40C to +105C (V) | -40C to +105C (V) | -40C to +85C (I) |
| Packaging | Tape and Reel (T) | Tube / Tray | Tape and Reel | Tube / Tray | Tube / Tray | Tube / Tray |
| Approx Unit Price (qty 1) | USD 4.95 | USD 4.85 | USD 4.45 | USD 3.95 | USD 3.55 | USD 5.10 |
Ключевые отличия
- On-chip USB 2.0 full-speed with dedicated 48 MHz PLL (против PIC32MX250F256B-V/SO)
- Wide -40C to +105C V-grade operating temperature (против PIC32MX270F256BT-I/SO)
- Mature MPLAB Harmony 3 framework and Curiosity board support (против PIC32MX230F256B-V/SO)
Заметки по проектированию
Decouple VDD with a 10 uF ceramic bulk plus a 0.1 uF high-frequency bypass placed within 5 mm of each VDD/VSS pair on the 28-SOIC. The PIC32MX270F256BT-V/SO has two VDD pins (pin 6 and pin 20) and two VSS pins (pin 7 and pin 19) which must each be decoupled. For USB designs, the on-chip USB transceiver draws short peaks during packet transmission; a 4.7 uF bulk capacitor on VUSB is recommended in addition to the standard VDD decoupling.
Route the 48 MHz USB crystal traces on the top layer with a continuous ground guard ring and via stitching every 3-5 mm. The USB D+/D- pair must be routed as a 90 ohm differential with maximum length matching of 1.5 mm. Keep the crystal traces shorter than 5 mm and avoid routing other signals under them. The high-current USB supply trace (VBUS) should be routed away from the analog AVSS/AVDD pair and the ADC reference pins if used. Estimated: the above routing rules assume a 1.6 mm FR4 4-layer stack-up typical of USB designs.
Do not leave the on-chip LDO's VCAP/VDDCORE pin (on 64-pin family members; verify on the 28-SOIC variant in the datasheet) un-bypassed - it requires a 10 uF capacitor for stable core operation. Ensure Peripheral Pin Select (PPS) lock configuration before entering sleep to prevent unintended pin remapping on wakeup. When migrating from PIC32MX170 to PIC32MX270 family code, check that the higher Flash address range is properly mapped in the linker script.
When driving an external DAC or codec over I2S, keep the I2S traces shorter than 50 mm and add 22-33 ohm series-termination resistors at the MCU side to dampen reflections. The I2S MCLK output can be a strong aggressor - place a ground trace between MCLK and the LRCLK/BCLK pairs. For CTMU touch channels, use the mTouch layout guide's guarded-electrode pattern to minimize stray capacitance and improve touch sensitivity. Estimated: trace lengths assume a 2-layer 1.6 mm FR4 stack-up.
Информация о соответствии
RoHS compliant and lead-free per Microchip's PIC32MX1XX/2XX family documentation. The -40C to +105C V-grade range is industrial/automotive cabin, not AEC-Q100 qualified. AEC-Q100 qualification is not standard on this family.
