PIC32MX350F256LT-V/PF - 80MHz 32-bit MCU 256KB Flash TQFP-100
MPN： PIC32MX350F256LT-V/PF ✓ 啟用中PIC32MX350F256LT-V/PF 概覽
Background knowledge - what is a PIC32MX3xx microcontroller: The PIC32MX3xx family is part of the broader PIC32MX family of 32-bit microcontrollers built around the MIPS32 M4K core, a Harvard-architecture RISC processor with single-cycle multiply and hardware divide. PIC32MX3xx sits between PIC32MX1/2 (lower pin count, smaller memory) and PIC32MX4/5/6/7 (higher pin count, larger memory and Ethernet). It is positioned in the broader microcontroller taxonomy as a mid-tier MCU: microcontroller -> 32-bit MCU -> MIPS-based MCU -> PIC32 family -> PIC32MX3/4 sub-family. The M4K core delivers 1.53 DMIPS/MHz and up to 150 DMIPS at 80 MHz, giving meaningful headroom for RTOS-driven and DSP-light workloads versus 8-bit PIC16/AVR alternatives.
Key specifications include 256 KB Flash (with 12 KB auxiliary Flash for data), 64 KB SRAM, 16 KB USB RAM (accessible to the CPU when USB is not used), an 8 MHz internal oscillator (with PLL up to 80 MHz), and CTMU / mTouch capacitive touch support. The device supports 5V-tolerant I/O, an operating voltage of 2.3V to 3.6V, and is offered in TQFP-100, TQFP-64, QFN-64, and die/die-package options. JTAG and 2-wire programming/debug interfaces are available via the MIPS-standard ICSP and Trace ports.
Typical applications include industrial control panels, USB HID/CDC peripherals, low-cost graphical HMI (paired with segmented LCD or color TFT via PMP), motor control companion MCUs, and connected sensor hubs. The V-temp grade specifically suits outdoor enclosures, factory automation, and automotive under-hood-adjacent environments. When designing, ensure the 100-pin TQFP PCB footprint has at least four-layer routing for decoupling and high-speed USB; allow adequate via fan-out under the exposed die pad if migrating to a TQFP variant without EPAD. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC32MX350F256LT-V/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： PIC32MX350F256LT-V/PF （相同外形與佔位） — 差異在於 ADC, Package, Timers, USB, Core Architecture.
PIC32MX250F256L-V/PF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC32MX150F256L-V/PF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC32MX270F512L-V/PF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC32MX170F512L-V/PF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →STM32F105VCT6
✅ 直接替換聯絡詢價
LPC1768FBD100
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX350F256LT-V/PF 最大額定值與電氣特性
| Architecture | MIPS32 M4K 32-bit RISC |
| CPU Core | MIPS32 M4K |
| Maximum CPU Frequency | 80 MHz |
| Performance | 1.53 DMIPS/MHz, up to 150 DMIPS |
| Program Flash | 256 KB (256K x 8) |
| Auxiliary Flash | 12 KB |
| SRAM | 64 KB |
| USB Dedicated RAM | 16 KB (CPU-accessible if USB disabled) |
| Operating Voltage | 2.3 V to 3.6 V |
| Temperature Grade (V) | -40 C to +105 C |
| Analog Comparators | 2 |
| I2C | 2 |
| SPI / I2S | 2 (SPI with I2S mode) |
| UART | 6 |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, 1 Msps, up to 28 channels |
| Timers | 5 x 16-bit, 5 x 32-bit (combined) |
| Parallel Master Port (PMP) | Yes (8/16-bit) |
| CTMU / mTouch | Yes |
| 封裝 | TQFP-100 (PF), 14x14 mm |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
| Programming/Debug | ICSP (2-wire), JTAG, Trace |
PIC32MX350F256LT-V/PF tqfp-100 (pf), 14x14 mm 腳位配置指南
PIC32MX350F256LT-V/PF（tqfp-100 (pf), 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： PIC32MX350F256LT-V/PF.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX350F256LT-V/PF 適用於 6 應用s: USB HID and CDC Peripherals, Industrial Control Panels with Graphical HMI, Low-Cost Motor Control Companion MCU, Connected Sensor Hubs with USB Diagnostics, Automotive Dashboard-Adjacent Modules, Portable USB-Powered Test Instruments.
USB HID and CDC Peripherals
The PIC32MX350F256LT-V/PF is well matched to USB Human Interface Device (HID) and Communications Device Class (CDC) peripherals because it integrates a USB 2.0 Full-Speed controller with OTG support and 16 KB of dedicated USB packet RAM. Designers can implement keyboards, mice, custom HID game controllers, or virtual COM port devices without an external USB transceiver, saving 1.5 to 2 dollars of BOM cost versus MCU + external PHY designs. The 80 MHz MIPS M4K core provides ample headroom for USB polling, HID report parsing, and a small RTOS that handles command queuing. At V-temp grade, this part operates reliably inside industrial enclosures or under automotive dashboards.
推薦
Industrial Control Panels with Graphical HMI
The PIC32MX350F256LT-V/PF drives mid-resolution color TFT displays through its Parallel Master Port (PMP) at up to 25 MHz pixel clock while still servicing capacitive touch inputs through the CTMU/mTouch peripheral. Industrial panel designers favor this part because it integrates PMP, CTMU, five 16-bit timers, and USB in one chip, replacing a discrete LCD controller plus MCU. The 256 KB Flash accommodates Segger emWin or Microchip's MLA graphics libraries along with a full PID control loop. V-temp grade -40 C to +105 C is required for outdoor panels in factory automation lines or solar-exposed kiosks.
推薦
Low-Cost Motor Control Companion MCU
The PIC32MX350F256LT-V/PF pairs as a companion MCU with dedicated motor control ICs such as the dsPIC33 or gate-driver pre-drivers. The MIPS32 M4K core runs a CANopen or EtherCAT communication stack, while the host motor controller handles torque loop closure. With five 16-bit timers generating six PWM channels and two analog comparators for current sensing, the 350 can also perform closed-loop control for sensorless BLDC fans or pumps below 100 W. The V-temp grade tolerates proximity to motor windings where temperatures can reach 100 C in sealed enclosures.
推薦
Connected Sensor Hubs with USB Diagnostics
The PIC32MX350F256LT-V/PF aggregates sensor data from SPI and I2C peripherals and exposes the readings to a host computer via USB CDC virtual COM port for diagnostics logging. Each of the two SPI/I2S ports and two I2C ports supports concurrent sensor transactions, and six UARTs provide backup serial debug channels. The 64 KB SRAM can buffer up to 8 seconds of 1 kHz sensor telemetry without host intervention. Industrial sensor hubs benefit from the V-temp grade for outdoor or process-plant mounting.
推薦
Automotive Dashboard-Adjacent Modules
While the PIC32MX350F256LT-V/PF is not AEC-Q100 qualified, the V-temp grade -40 C to +105 C allows deployment in cabin and trunk-located automotive modules where under-hood thermal stress is absent. Common use cases include aftermarket infotainment controllers, OBD-II diagnostic interfaces with USB host logging, and cabin climate control HMIs. The 100-pin TQFP package provides enough I/O for LCD, button matrix, rotary encoders, and CAN bus interfacing through external transceivers. For full AEC-Q100 automotive qualification, designers must migrate to the PIC32MK or dsPIC33AEC families instead.
推薦
Portable USB-Powered Test Instruments
Battery- and USB-powered bench instruments such as simple logic analyzers, bench multimeter front-ends, and educational oscilloscopes use the PIC32MX350F256LT-V/PF as their USB device controller and main CPU. The 10-bit 1 Msps ADC handles 28 channels of analog input at sufficient bandwidth for sub-100 kHz signal capture, while USB CDC delivers the waveform data to a host PC. The 80 MHz core decodes SPI, I2C, or UART protocols in real time without dropping samples. V-temp grade supports harsh lab environments with unstable thermal conditions.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX350F256LT-V/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 | PIC32MX250F256L-V/PF | PIC32MX150F256L-V/PF | PIC32MX270F512L-V/PF | STM32F105VCT6 | LPC1768FBD100 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics | NXP Semiconductors |
| Package | TQFP-100 (PF) 14x14 mm | TQFP-100 (PF) - same | TQFP-100 (PF) - same | TQFP-100 (PF) - same | LQFP-100 - same footprint | LQFP-100 - same footprint |
| CPU Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | ARM Cortex-M3 | ARM Cortex-M3 |
| Max Frequency | 80 MHz | 80 MHz | 80 MHz (50 MHz variant exists) | 80 MHz (50 MHz variant exists) | 72 MHz | 100 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 512 KB | 256 KB | 512 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| USB | USB 2.0 FS Device/Host/OTG | No | No | No | USB 2.0 FS OTG + CAN | USB 2.0 FS Host/Device/OTG + Ethernet |
| Temperature Grade | V-grade -40 C to +105 C | V-grade -40 C to +105 C | V-grade -40 C to +105 C | V-grade -40 C to +105 C | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
主要差異化特點
- Only 100-pin TQFP PIC32MX3 family variant with USB OTG (對比PIC32MX250F256L-V/PF)
- Drop-in replacement with double Flash (對比PIC32MX270F512L-V/PF)
- Cortex-M3 cross-brand upgrade with Ethernet (對比LPC1768FBD100)
設計說明
The PIC32MX350F256LT-V/PF operates from 2.3V to 3.6V and draws approximately 70 mA active at 80 MHz across all peripherals enabled. Use a ferrite bead plus 10 uF + 100 nF + 10 nF decoupling network on AVDD and a separate 100 nF + 1 uF on VDDUSB to isolate the USB PHY supply from digital switching noise. The internal 8 MHz Fast RC oscillator with PLL is typically stable to within +/- 2 percent across the V-temp range, but USB Full-Speed requires an external 48 MHz crystal referenced through the USB PLL branch for compliance. Estimated: based on typical values from the Microchip PIC32MX3xx4xx family datasheet DS61168, not measured.
The 100-pin TQFP (PF) package has 0.5 mm pitch and 14x14 mm body. Use 0.25 mm laser-drilled vias in a 0.5 mm grid fan-out under the package, with at least 6 mil trace and 6 mil space for signal routing on the outer two layers. The TQFP-100 variant has no exposed pad, simplifying thermal layout compared to QFN packages. A four-layer stackup with a continuous ground plane on layer 2 is recommended for USB differential pair impedance control (90 ohm differential).
Do not enable the USB peripheral without a valid 48 MHz USB PLL reference - the device will latch up the USB bus. Do not operate VDD below 2.3V when USB is enabled; this violates the USB PHY analog supply spec. Do not rely on the 16 KB USB RAM as general SRAM in firmware unless USB is permanently disabled. The CTMU peripheral requires calibration per part for mTouch accuracy - do not assume default constants. Estimated: based on common PIC32MX3xx silicon errata (DS80344).
At 80 MHz with all peripherals enabled, the TQFP-100 (PF) dissipates approximately 220 mW worst-case (theta_JA roughly 50 C/W for 4-layer JEDEC EIA/JESD51 test board). This translates to a 11 C junction rise at 25 C ambient, well within the 125 C absolute maximum. In sealed enclosures above 60 C ambient, derate by 10 mW per 5 C or reduce peripheral count to maintain reliability. Estimated: not measured on this exact board, derived from family datasheet power budget.
合規資訊
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - choose PIC32MK or dsPIC33AEC families for automotive. Halogen-free status not explicitly stated in distributor data.
