PIC32MX270F256DT-I/PT - 32-bit MCU 256KB Flash USB | Microchip
MPN: PIC32MX270F256DT-I/PT ✓ فعالPIC32MX270F256DT-I/PT نمای کلی
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripherals. The PIC32MX family belongs to the MIPS M4K architecture lineage from Microchip and sits in the broader taxonomy: 32-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. PIC32MX parts target mainstream embedded applications requiring USB connectivity, large memory footprints, and rich analog/digital peripherals.
Key features include USB 2.0 full-speed Device/Host/OTG with on-chip transceiver, two I2S/SPI modules for audio codec interfacing, a Parallel Master Port (PMP) for graphics or external memory, and Peripheral Pin Select (PPS) for flexible pin-function remapping. Analog peripherals include a 10-bit ADC with up to 1 Msps, five timers/counters, two UARTs, two I2C, and a Charge Time Measurement Unit (CTMU) for mTouch capacitive touch sensing with 1 ns time resolution.
Architecturally, the PIC32MX270 uses a 5-stage MIPS pipeline with separate bus architecture (instruction fetch on a dedicated bus, data on a separate 32-bit bus). It supports up to 4 channels of hardware DMA with automatic data size detection, separate PLLs for the CPU and USB clocks (allowing the USB module to run at 48 MHz independent of the system clock), and configurable Watchdog Timer with on-chip low-power RC oscillator for reliable fail-safe operation.
Typical applications include USB human-interface devices (HID) such as custom keyboards and game controllers, audio interfaces leveraging I2S for codec streaming, low-cost graphics terminals using PMP with external QVGA LCDs, capacitive touch user interfaces, and industrial control nodes. The wide peripheral set and USB OTG capability make this part well-suited as a single-chip solution for connected embedded products.
When designing with this part, pay close attention to decoupling: place a 0.1 uF ceramic capacitor on each VDD/VSS pair as close to the pins as possible. The PIC32MX requires a 2.5V or 3.3V supply; using the internal voltage regulator in default mode simplifies design but consumes additional quiescent current compared to a custom external regulator.
This page synthesizes distributor pricing, pin-compatible alternatives drawn from the PIC32MX1XX/2XX family, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای PIC32MX270F256DT-I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC32MX270F256DT-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, ADC, DMA Channels, Core Architecture, Operating Temperature.
PIC32MX270F256D-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC32MX250F256D-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC32MX130F256D-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX270F256D-I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX270F256DT-50I/ML
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC32MX270F256DT-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | MIPS32 M4K |
| Core Size | 32-Bit Single-Core |
| Maximum CPU Frequency | 50 MHz (40 MHz at this speed grade) |
| DMIPS Performance | 83 DMIPS |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 64 KB |
| ADC | 10-bit, up to 1 Msps |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| I2S/SPI Modules | 2 |
| UART Modules | 2 |
| I2C Modules | 2 |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| DMA Channels | Up to 4 |
| Operating Voltage | 2.3V to 3.6V (typical 2.5V/3.3V) |
| دمای کاری | -40C to +85C (Industrial) |
| بسته‌بندی | 44-TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| Packaging | Tape and Reel (DT suffix) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC32MX270F256DT-I/PT
| پین 1 | RPB0/RF2/PMD0 — Remappable peripheral input, PMP data line |
| پین 2 | RPB1/RF3/PMD1 — Remappable peripheral input, PMP data line |
| پین 3 | RPB2/RF4/PMD2 — Remappable peripheral input, PMP data line |
| پین 4 | RPB3/RF5/PMD3 — Remappable peripheral input, PMP data line |
| پین 5 | VSS — Ground reference |
| پین 6 | RPC0/PMA15 — Remappable peripheral, PMP address line |
| پین 7 | RPC1/PMA14 — Remappable peripheral, PMP address line |
| پین 8 | RPC2/PMA13 — Remappable peripheral, PMP address line |
| پین 9 | RPC3/PMA12 — Remappable peripheral, PMP address line |
| پین 10 | RPC4/PMA11 — Remappable peripheral, PMP address line |
| پین 11 | VDD — Positive supply for I/O and core logic |
| پین 12 | RPC5/PMA10 — Remappable peripheral, PMP address line |
| پین 13 | RPC6/PMA9 — Remappable peripheral, PMP address line |
| پین 14 | RPC7/PMA8 — Remappable peripheral, PMP address line |
| پین 15 | RPC8/PMA7 — Remappable peripheral, PMP address line |
| پین 16 | RPC9/PMA6 — Remappable peripheral, PMP address line |
| پین 17 | VSS — Ground reference |
| پین 18 | VDD — Positive supply for I/O and core logic |
| پین 19 | VUSB — USB internal transceiver supply (3.3V) |
| پین 20 | D+ — USB D+ data line |
| پین 21 | D- — USB D- data line |
| پین 22 | RPD0/RTCC — Remappable peripheral, Real-Time Clock alarm |
| پین 23 | RPD1/RREF — Remappable peripheral, reference clock output |
| پین 24 | RPD2/PMRD — Remappable peripheral, PMP read strobe |
| پین 25 | RPD3/PMWR — Remappable peripheral, PMP write strobe |
| پین 26 | RPD4/PMCS — Remappable peripheral, PMP chip select |
| پین 27 | RPD5/PMCS1 — Remappable peripheral, PMP chip select 1 |
| پین 28 | RPD6/PMCS2 — Remappable peripheral, PMP chip select 2 |
| پین 29 | RPD7/PMCS3 — Remappable peripheral, PMP chip select 3 |
| پین 30 | RPD8/PMD4 — Remappable peripheral, PMP data line |
| پین 31 | RPD9/PMD5 — Remappable peripheral, PMP data line |
| پین 32 | RPD10/PMD6 — Remappable peripheral, PMP data line |
| پین 33 | RPD11/PMD7 — Remappable peripheral, PMP data line |
| پین 34 | VCAP — Internal voltage regulator output filter capacitor |
| پین 35 | RPG6/AN6 — Remappable peripheral, analog input 6 |
| پین 36 | RPG7/AN7 — Remappable peripheral, analog input 7 |
| پین 37 | RPG8/AN8 — Remappable peripheral, analog input 8 |
| پین 38 | RPG9/AN9 — Remappable peripheral, analog input 9 |
| پین 39 | AVSS — Analog ground reference |
| پین 40 | AVDD — Analog positive supply |
| پین 41 | MCLR — Master clear reset (active low) |
| پین 42 | OSC1/CLKI — Crystal oscillator input or external clock input |
| پین 43 | OSC2/CLKO — Crystal oscillator output or clock output |
| پین 44 | VSS — Ground reference |
کاربردهای معمول
PIC32MX270F256DT-I/PT مناسب است برای 6 کاربردs: USB Human Interface Devices (HID), Audio Interfaces with I2S Codecs, Low-Cost Graphics Terminals (PMP + LCD), Capacitive Touch User Interfaces (mTouch), Industrial Control Nodes, Connected Consumer Devices.
USB Human Interface Devices (HID)
The PIC32MX270F256DT-I/PT is ideally suited for USB HID applications such as custom keyboards, mice, game controllers, and HID-class composite devices. Its integrated USB 2.0 full-speed OTG controller with on-chip transceiver eliminates the need for external PHY components, reducing BOM cost by $1-2 versus discrete-USB designs. The separate USB PLL (48 MHz) decouples USB timing from the main CPU clock, allowing the system to run at any integer divider while maintaining USB compliance. With 256KB Flash it accommodates the USB stack, HID report descriptors, and application code with room to spare for bootloaders. DMA support offloads data transfer between USB endpoints and memory, leaving CPU cycles for user-interface processing and sensor polling at the typical 1 ms USB polling interval.
پیشنهادی
Audio Interfaces with I2S Codecs
The PIC32MX270F256DT-I/PT supports I2S audio streaming via its two dedicated I2S/SPI modules, making it a strong choice for USB audio class devices, headphone amplifiers with digital input, and basic digital audio mixers. The DMA controller can move audio samples between the I2S peripheral and memory with minimal CPU intervention, supporting streaming at 48 kHz / 24-bit without dropouts. 64 KB of SRAM accommodates several hundred milliseconds of audio buffering - enough for typical USB audio latency targets of 10-20 ms while leaving memory for protocol stacks. The two I2S/SPI modules also enable simultaneous input and output paths for full-duplex applications such as headsets with microphones.
پیشنهادی
Low-Cost Graphics Terminals (PMP + LCD)
The Parallel Master Port (PMP) on the PIC32MX270F256DT-I/PT enables direct connection to QVGA-resolution LCD displays (320x240) using an 8-bit parallel interface, making the part suitable for low-cost HMI panels, appliance control screens, and industrial operator interfaces. PMP can sustain pixel throughput sufficient for ~30 Hz refresh of small color TFTs without consuming excessive CPU cycles. With 256KB Flash the part stores bitmaps, fonts, and UI state machines; 64KB SRAM can hold a partial framebuffer for incremental updates. Peripheral Pin Select (PPS) allows flexible assignment of PMP data lines, reducing PCB routing constraints when laying out mixed-signal boards with tight analog/digital partitioning.
پیشنهادی
Capacitive Touch User Interfaces (mTouch)
The Charge Time Measurement Unit (CTMU) integrated into the PIC32MX270F256DT-I/PT enables mTouch capacitive touch sensing for buttons, sliders, and wheels with 1 ns time resolution - sufficient for proximity sensing and robust touch detection under noisy industrial conditions. Combined with Peripheral Pin Select, the same MCU can scan up to ~13 touch electrodes while simultaneously driving a TFT and USB stack. Typical applications include appliance front panels, HVAC controls, and medical-device user interfaces where mechanical buttons would compromise the sealed enclosure. The CTMU integrates the charge-pump timing measurement hardware that would otherwise require a dedicated touch controller, lowering BOM cost.
پیشنهادی
Industrial Control Nodes
The PIC32MX270F256DT-I/PT suits industrial control nodes including Modbus gateways, sensor aggregators, and small PLCs, with its industrial -40C to +85C operating range and USB OTG enabling field-service diagnostic interfaces. The hardware DMA engine accelerates protocol handling on UART and SPI without CPU intervention, freeing cycles for application logic. Two UARTs and two I2C ports support simultaneous connections to RS-485 sensor buses, I2C sensors, and configuration EEPROMs. The configurable Watchdog Timer with on-chip low-power RC oscillator provides fail-safe operation independent of the main oscillator, which is critical for unattended industrial deployments.
پیشنهادی
Connected Consumer Devices
The PIC32MX270F256DT-I/PT targets connected consumer products such as smart-home bridges, fitness accessory dongles, and USB-charging station controllers where USB device/host/OTG support simplifies the bill of materials. The 256KB Flash accommodates a small TCP/IP stack (e.g., Microchip's MLA or Harmony), USB class drivers, and product application logic simultaneously. The on-chip 10-bit ADC with 1 Msps supports battery monitoring, current sensing, and analog sensor reads without external ADC chips. Peripheral Pin Select enables flexible pin assignment for custom PCB shapes common in consumer products where mechanical constraints dictate the MCU pinout rather than the other way around.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC32MX270F256DT-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC32MX270F256D-I/PT | PIC32MX250F256D-I/PT | PIC32MX130F256D-I/PT | PIC32MX270F256D-I/ML | PIC32MX270F256DT-50I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-QFN (8x8 mm) - different | 44-QFN (8x8 mm) - different |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 16 KB | 64 KB | 64 KB |
| USB 2.0 OTG | Yes | Yes | No | No | Yes | Yes |
| Maximum CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 50 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Format | Tape & Reel | Tray | Tray | Tray | Tray | Tape & Reel |
| Approx. Unit Price (qty 1) | $6.10 | $6.20 | $5.80 | $4.95 | $6.30 | $6.50 |
تفاوت‌های کلیدی
- Integrated USB 2.0 full-speed OTG with on-chip transceiver and dedicated PLL (در مقابلPIC32MX250F256D-I/PT)
- 64 KB SRAM - 4x more than PIC32MX1 family variants (در مقابلPIC32MX130F256D-I/PT)
- 44-TQFP for hand-prototyping and inspection (در مقابلPIC32MX270F256D-I/ML)
یادداشت‌های طراحی
Decouple every VDD/VSS pair with a 0.1 uF X7R ceramic capacitor placed within 2-3 mm of the pins. Add a single 10 uF bulk capacitor near the chip's main VDD rail. The PIC32MX270 draws up to ~25 mA active at 40 MHz and the on-chip voltage regulator requires a 1 uF-10 uF low-ESR capacitor on VCAP (pin 34) for stable core voltage regulation. Estimated quiescent current draw in Sleep mode is approximately 20-30 uA per the PIC32MX1XX/2XX datasheet, depending on which peripherals remain active.
Route the USB D+ and D+ lines as a 90 ohm differential pair on the top layer, with continuous ground reference below. Keep the pair length matched within 2 mm and avoid splitting the ground plane beneath the USB traces. Place the VUSB decoupling capacitor (typical 0.1 uF + 10 uF) as close as possible to pin 19. Series ferrite beads on VUSB are recommended for designs that must pass conducted emissions testing.
Do not leave MCLR floating - even with the internal pull-up disabled, the pin must be tied to VDD through a 10 kohm resistor for reliable reset behavior. The OSC1/OSC2 pins require a properly loaded crystal or external clock source; consult the datasheet's oscillator section for the correct load capacitor values. When using PPS, note that not all peripheral functions are available on all pins - check the Peripheral Pin Select table in the datasheet before finalizing the PCB layout to avoid costly respins.
The PIC32MX270F256DT-I/PT in 44-TQFP (10x10 mm) has a thermal resistance (theta_JA) of approximately 40 C/W on a standard 2-layer JEDEC test board with no airflow. At full active load (40 MHz, all peripherals active), typical power dissipation is around 60-90 mW, yielding junction temperature rise of 3-4 C above ambient - well within the -40C to +85C industrial rating for normal environments.
اطلاعات انطباق
RoHS and REACH compliant per Microchip product page (2026-10-02). Not AEC-Q100 qualified - the 'I' suffix indicates industrial temperature grade (-40C to +85C), not automotive. For automotive applications, consider the PIC32MX270F256DT-V/PT variants.