PIC32MX270F512LT-I/PF - 32-Bit MCU 512KB Flash 100-TQFP | Microchip
MPN： PIC32MX270F512LT-I/PF ✓ 啟用中PIC32MX270F512LT-I/PF 概覽
What is a PIC32MX2xx microcontroller? The PIC32MX2xx family is Microchip's mid-range MIPS32 M4K 32-bit MCU line, sitting in the product hierarchy between the smaller PIC32MX1xx (lower pin count, less memory) and the higher-end PIC32MX5xx/6xx/7xx (more peripherals and DSP). PIC32MX2xx parts are commonly used in consumer, industrial, and HMI applications where USB, CAN, and graphics/audio support are needed without paying for DSP extensions. The 100-pin TQFP options in this family (L-variant) expose the maximum I/O count for the most peripheral-dense designs.
Key features of the PIC32MX270F512LT-I/PF include 81 available I/O pins, 16-channel 10-bit ADC at 1 Msps, five 16-bit timers/capture/compare, two comparators, two I2C, two SPI, six UART, USB 2.0 full-speed device/host/OTG, CAN 2.0B, I2S audio interface, Peripheral Pin Select (PPS) for flexible signal routing, and JTAG/ICSP debug. Operating voltage is 2.3V to 3.6V from a single supply, with industrial temperature grade of -40C to +85C.
The device uses a 5-stage pipeline Harvard architecture and supports Microchip's MPLAB Harmony, MPLAB XC32 compiler, and the free MPLAB Snap/PICkit 4 toolchain. Its Peripheral Pin Select (PPS) remapping allows many digital peripherals to be mapped to a wide range of physical pins, simplifying PCB layout.
Typical applications include USB peripherals (HID, CDC, mass storage), CAN-bus industrial nodes, audio playback with I2S, low-cost graphical HMI, sensor hubs, and motor-control command interfaces. For a learning curve familiar to PIC24/dsPIC users, the PIC32MX2xx is the natural 32-bit migration path.
When designing with this MCU, allocate decoupling capacitance close to each power pin (0.1 uF plus bulk), route the 40 MHz crystal traces symmetrically with a guard ground, and configure PPS mappings in code before peripheral use. The 100-pin TQFP package is 14x14 mm and is hand-solderable with proper technique, making it suitable for prototypes and small production runs.
This page synthesizes distributor pricing, same-package drop-in PIC32 family alternatives, and practical design notes not collected in any single manufacturer document.
直接替換替代品，適用於 PIC32MX270F512LT-I/PF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX270F512LT-I/PF （相同外形與佔位） — 差異在於 ADC, Package, Parallel Master Port (PMP), Core Architecture, Mounting Type.
PIC32MX270F512LT-50I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX270F512L-50I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX270F512LT-V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX170F512LT-I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX270F512LT-I/PF 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Speed | 40 MHz |
| Program Flash | 512 KB |
| SRAM | 64 KB |
| 腳位數 | 100 |
| 封裝 | 100-TQFP (14x14 mm) |
| I/O Pins | 81 |
| 供應電壓 | 2.3 V to 3.6 V |
| 工作溫度 | -40C to +85C (Industrial) |
| ADC | 10-bit, up to 1 Msps, 16 channels |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| CAN | CAN 2.0B |
| UART | 6 |
| SPI | 2 |
| I2C | 2 |
| I2S | Yes (audio interface) |
| Timers | 5 x 16-bit |
| Comparators | 2 |
| CTMU | Yes (Charge Time Measurement Unit) |
| RTCC | Yes (Real-Time Clock Calendar) |
| PPS (Peripheral Pin Select) | Yes |
| Debug Interface | JTAG / ICSP (2-wire) |
| 安裝類型 | Surface Mount (Tape and Reel) |
| RoHS 狀態 | Compliant |
PIC32MX270F512LT-I/PF 100-tqfp (14x14 mm) 腳位配置指南
PIC32MX270F512LT-I/PF（100-tqfp (14x14 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC32MX270F512LT-I/PF.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX270F512LT-I/PF 適用於 6 應用s: USB HID / CDC Peripherals, CAN-bus Industrial Nodes, Audio Playback (I2S / PWM), Graphical HMI / Touch Panels, Sensor Hubs and Data Loggers, IoT Edge / Smart Home Devices.
USB HID / CDC Peripherals
The PIC32MX270F512LT-I/PF's integrated USB 2.0 full-speed peripheral with on-chip transceiver makes it ideal for USB Human Interface Devices (HID), Communication Device Class (CDC) virtual COM ports, and Mass Storage Class peripherals. Its 40 MHz core delivers sufficient MIPS for HID report encoding and CDC throughput. Place the MCU with 0.1 uF decoupling on each VDD/VSS pair, a 1 uF bulk capacitor on VBUS, and 33 ohm series resistors on D+ and D- lines matching 90 ohm differential impedance. Compared to PIC24 USB parts, the 32-bit MIPS core provides 4x the processing headroom.
推薦
CAN-bus Industrial Nodes
The PIC32MX270F512LT-I/PF's integrated CAN 2.0B controller combined with 512 KB Flash and 64 KB SRAM enables robust industrial CAN nodes for sensors, motor controllers, and factory automation. The 81 available I/O pins comfortably host CAN, RS-485, encoder feedback, and several PWM channels in a single chip. Use a 3.3V CAN transceiver like MCP2551 or TLE7251-3 between the MCU's CANRX/CANTX pins and the bus. The Peripheral Pin Select feature simplifies PCB routing by remapping CAN to convenient pins without changing the firmware architecture.
推薦
Audio Playback (I2S / PWM)
The PIC32MX270F512LT-I/PF's I2S peripheral and PWM outputs make it suitable for low-cost audio playback, alarm generators, and DTMF tone synthesizers. The I2S block streams 16/24-bit audio samples directly from an external DAC, with DMA offload to keep CPU usage low. For a complete audio design, pair with an I2S DAC such as PCM5102A and a Class-D amplifier. The 40 MHz MIPS core can decode MP3 or ADPCM in software at modest bitrates, and 64 KB SRAM holds a 1-2 second audio buffer.
推薦
Graphical HMI / Touch Panels
With 512 KB Flash and 64 KB SRAM, the PIC32MX270F512LT-I/PF supports small color TFT displays and the integrated CTMU (Charge Time Measurement Unit) for capacitive touch sensing. Pair with a 3.5-inch parallel TFT, and use the Parallel Master Port to drive 8/16-bit displays at high refresh rates. The CTMU measures touch pad capacitance changes without external components, reducing BOM cost. Industrial temperature grade and 81 I/O pins handle buttons, encoders, and LEDs alongside the display.
推薦
Sensor Hubs and Data Loggers
The PIC32MX270F512LT-I/PF's 16-channel 10-bit ADC at 1 Msps, six UART, two I2C, and two SPI are well-suited for multi-sensor data aggregation and logging. Its CTMU enables time-of-flight or temperature measurements. With 64 KB SRAM, a buffer of several hundred sensor samples is feasible. Add a 1 Mbit SPI Flash for non-volatile storage of up to 32 K readings, or stream data over USB to a host. The 2.3-3.6 V supply range allows direct battery connection for portable instrumentation.
推薦
IoT Edge / Smart Home Devices
The PIC32MX270F512LT-I/PF is a strong fit for IoT edge controllers that bridge sensors to Wi-Fi or Ethernet modules. With USB, CAN, I2S, and a wide peripheral mix, the MCU acts as the main application processor for gateways that aggregate Zigbee, BLE, or LoRa data. The Peripheral Pin Select allows flexible pin mapping when adding sub-modules. Its 2.3-3.6 V supply range supports battery charging ICs, and the industrial temperature grade suits outdoor enclosures.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX270F512LT-I/PF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX270F512LT-50I/PF | PIC32MX270F512L-50I/PT | PIC32MX270F512LT-V/PF | PIC32MX170F512LT-I/PF |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| CPU Speed | 40 MHz | 50 MHz | 50 MHz | 40 MHz | 40 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB | 512 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | No |
| CAN | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | No |
| I2S | Yes | Yes | Yes | Yes | No |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Automotive -40C to +105C | Industrial -40C to +85C |
| Packaging Form | Tape and Reel | Tape and Reel | Tray | Tape and Reel | Tape and Reel |
主要差異化特點
- Highest pin count 100-TQFP option in the PIC32MX270 sub-family (對比PIC32MX270F256D-I/PT)
- Dedicated USB 2.0 full-speed peripheral with on-chip transceiver (對比PIC32MX170F512LT-I/PF)
- Industrial temperature range standard, with -V automotive variant for higher temps (對比PIC32MX230F128L-I/PF)
設計說明
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of every VDD/VDDIO pin and a 10 uF bulk capacitor near the MCU. Add a 0.1 uF plus 10 uF on AVDD/AVSS. The PIC32MX270F512LT-I/PF draws approximately 60 mA at 40 MHz with all peripherals active, so design the 3.3 V rail for at least 100 mA headroom. Use a low-noise LDO like MCP1700 or a small switching regulator (MIC23050) for USB-powered designs.
Route the 40 MHz primary oscillator traces symmetrically with a grounded guard ring and keep total trace length under 10 mm. The USB D+/D- traces require 90 ohm differential impedance with matched length and a 33 ohm series resistor at each line. Place the USB connector's shield ground to chassis ground, not signal ground, and add ESD protection (e.g. USBLC6-2SC6) at the connector.
Do not forget to unlock the Peripheral Pin Select registers (CFGCON bit) before remapping functions, or the peripheral will not appear on the new pin. Configure JTAG pins (TMS, TCK, TDI, TDO) as GPIO before first use if JTAG is not required, or the pins will be locked to debug functions. For CAN, configure timing with the correct BRP values for your target baud rate; the ECI or Vector CANalyzer tool helps verify.
For high-speed designs running the SPI at 10 MHz or above, add a 33 ohm series resistor at the SCK output to dampen reflections. The 10-bit ADC achieves 1 Msps only with a low-impedance source (1 kohm or less); add an op-amp buffer (MCP6001) for high-impedance sensors. Keep analog and digital ground planes separated and join at a single point near the MCU's GND pin.
合規資訊
RoHS compliant per Microchip product page. Industrial grade -40C to +85C; for AEC-Q100 automotive grade use the PIC32MX270F512LT-V/PF variant. Lead-free and halogen-free per Microchip environmental compliance statements.
