PIC24FJ256GU408T-I/PT - 256KB MCU, USB, LCD, 80-TQFP | Microchip
MPN： PIC24FJ256GU408T-I/PT ✓ 啟用中PIC24FJ256GU408T-I/PT 概覽
A 16-bit microcontroller (MCU) is a programmable semiconductor device that executes instructions on a 16-bit data path, sitting in the hierarchy between 8-bit MCUs and 32-bit ARM Cortex-M parts. PIC24F devices use a modified Harvard architecture with a 16-bit instruction word, 24-bit instruction set encoding, and a 16 MIPS core designed for low-power embedded applications with rich peripheral integration. Within the broader taxonomy, the PIC24FJ falls under microcontroller -> embedded MCU -> semiconductor IC.
Key features of the PIC24FJ256GU408 include 256 KB ECC Flash (single partition option) with 32 KB RAM, hardware crypto support on selected variants, a full-speed USB 2.0 device/host/OTG controller, an integrated LCD driver (up to 64 segments x 4 commons), a 12-bit ADC, multiple UART/SPI/I2C peripherals, and Core Independent Peripherals (CIPs) such as CLC, MCCP, and DMA. The 80-TQFP package provides ample I/O with 69 remappable I/O pins.
Architecturally, the part uses Microchip's nanoWatt XLP eXtreme Low-Power technology, supporting sleep currents below 1 µA in deep sleep with full RAM retention and multiple wake-up sources. The dual-partition flash arrangement allows one partition to run while the other is updated, enabling safe OTA upgrades.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial HMI with LCD, medical point-of-care devices, IoT sensor hubs with USB diagnostics, automotive body/comfort modules, and consumer appliances with segmented LCD UI. The integrated LCD and USB eliminate the need for external display drivers or interface chips.
When designing, consider that the 80-TQFP requires a 12x12 mm PCB footprint with thermal pad handling and that the dual-partition OTA bootloader requires firmware design considerations for safe rollback. Choose the QFP part for hand-reworkable prototypes, and the QFN/BGA equivalents for space-constrained production.
This page synthesizes DigiKey/Mouser distributor pricing, Microchip datasheet specifications, pin-compatible PIC24F family drop-in alternatives, and practical design notes that the bare manufacturer datasheet does not consolidate in one place.
直接替換替代品，適用於 PIC24FJ256GU408T-I/PT — 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： PIC24FJ256GU408T-I/PT （相同外形與佔位） — 差異在於 ADC, Package, USB, Core Architecture, I/O Pins.
PIC24FJ256GU408-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GU410T-I/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC24FJ256GL408T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GU406T-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GB610-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ128GU408-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GU408T-I/PT 最大額定值與電氣特性
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Core Frequency | 32 MHz (16 MIPS) |
| Flash Program Memory | 256 KB with ECC |
| SRAM | 32 KB |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| LCD Controller | Integrated segmented LCD driver |
| ADC | 12-bit |
| Supply Voltage (Typ.) | 3.3 V |
| 工作溫度 | -40C to +85C (Industrial) |
| I/O Pins | 69 (remappable) |
| 封裝 | 80-pin TQFP (12x12 mm) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 |
| RoHS 狀態 | Compliant |
| Low-Power Technology | nanoWatt XLP |
PIC24FJ256GU408T-I/PT 80-pin tqfp (12x12 mm) 腳位配置指南
PIC24FJ256GU408T-I/PT（80-pin tqfp (12x12 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： PIC24FJ256GU408T-I/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC24FJ256GU408T-I/PT 適用於 6 應用s: USB HID / CDC Peripherals, Industrial HMI with Segmented LCD, IoT Sensor Hubs with USB Diagnostics, Medical Point-of-Care Devices, USB-C Charging and Power Banks, Automotive Body and Comfort Modules.
USB HID / CDC Peripherals
The PIC24FJ256GU408T-I/PT is purpose-built for USB peripherals thanks to its integrated USB 2.0 Full-Speed controller that supports Device, Host, and OTG modes. With 256 KB ECC Flash and 32 KB SRAM, it can host HID class drivers, CDC virtual COM stacks, or USB mass-storage firmware without external interface ICs. The 32 MHz / 16 MIPS PIC24F core provides enough throughput for USB interrupt-driven traffic plus user-application processing. Designers typically run the USB stack on the main thread while CIPs like DMA service endpoint transfers. Compared to adding an external USB PHY/interface chip, the integrated controller saves BOM cost (~$0.50-1.00) and PCB area, making the device ideal for low-cost USB keyboards, custom HID game controllers, USB-to-UART bridges, and diagnostic tools. The -I/PT industrial temperature grade suits outdoor and factory-floor deployments.
推薦
Industrial HMI with Segmented LCD
The PIC24FJ256GU408T-I/PT integrates a segmented LCD driver capable of driving 64 segments x 4 commons directly, eliminating external LCD driver ICs in industrial HMI designs. Its 256 KB Flash can hold multi-language UI assets and lookup tables, while 32 KB SRAM supports button debouncing, RTOS-free event loops, and serial-over-USB remote UI. The -40C to +85C industrial temperature grade makes the device suitable for factory-floor HMIs, thermostat controllers, and pump panel displays. nanoWatt XLP technology allows the display to stay live during battery-backed standby, drawing well below 1 mA average. The 80-TQFP package offers enough I/O (69 pins) to drive the LCD, mechanical buttons, relay outputs, and a UART link to a host PLC. CIPs like CLC let designers implement capacitive-touch sensing in hardware without CPU intervention, reducing software complexity for IEC 60730 safety-class UI firmware.
推薦
IoT Sensor Hubs with USB Diagnostics
The PIC24FJ256GU408T-I/PT combines 256 KB ECC Flash with USB diagnostics capability, making it ideal for IoT sensor hubs that need local debug, log retrieval, or over-the-air firmware update via USB. The dual-partition flash supports safe OTA rollback - if the new firmware fails integrity checks, the bootloader reverts to the previous image, critical for unattended IoT deployments. With 32 KB SRAM, the device can buffer sensor payloads before forwarding over LoRa, Wi-Fi co-processor, or cellular modem UART. CIPs like DMA service SPI/I2C sensor arrays without CPU load, while the 12-bit ADC handles analog sensors directly. Industrial temperature grade suits outdoor environmental monitors, smart agriculture sensor stations, and building automation nodes. XLP low-power technology enables battery-only operation for solar-harvested IoT sites where AC power is impractical.
推薦
Medical Point-of-Care Devices
The PIC24FJ256GU408T-I/PT is well-suited for medical point-of-care devices thanks to its 32 MHz / 16 MIPS PIC24F core, integrated USB for connecting to laptops or tablets, and 256 KB ECC Flash with dual-partition OTA for safe firmware updates under regulatory change control. The integrated 12-bit ADC handles analog signals from electrochemical sensors, photodiodes, or temperature probes, while the segmented LCD controller can drive a numeric/graphic status display without extra ICs. ECC Flash is important for medical device reliability: bit errors are detected and corrected, reducing the risk of undetected firmware corruption in the field. CIPs allow deterministic timing for sensor sampling and timing-critical protocols. Industrial temperature grade and Microchip's longevity program make the part a fit for medical device life cycles of 7-10+ years. Designers should pair with appropriate isolation, ESD, and IEC 60601-1 analog front-end components.
推薦
USB-C Charging and Power Banks
The PIC24FJ256GU408T-I/PT supports USB-C charging and power-bank applications via its integrated USB 2.0 Full-Speed controller, which can negotiate BC1.2 and proprietary charging protocols. With 256 KB Flash, designers can implement adaptive charging algorithms, fuel-gauge interfaces, OLED/LCD status displays, and BLE/Wi-Fi co-processor bridges. The segmented LCD controller can directly drive battery-level indicators, while the 12-bit ADC monitors cell voltage and current with sufficient resolution for coulomb counting. nanoWatt XLP technology enables standby currents below 100 µA, critical for power banks that sit unused for months. The 80-TQFP gives enough I/O for multiple USB-C ports, button inputs, and indicator LEDs. The industrial temperature grade covers outdoor and automotive-cabin use. CIPs like CCP/OC handle PWM battery-balancing and boost-converter control without burdening the CPU.
推薦
Automotive Body and Comfort Modules
While the PIC24FJ256GU408T-I/PT itself is not AEC-Q100 qualified, it is widely used in non-safety automotive body and comfort applications such as interior lighting controllers, seat-position memory, rear-seat entertainment remotes, and aftermarket infotainment accessories. With 256 KB Flash and integrated USB, the part can act as a USB-to-CAN gateway or a Bluetooth audio bridge. nanoWatt XLP technology supports low quiescent current for always-on cabin features that must not drain the battery when the vehicle is parked. The 80-TQFP package with 69 I/O pins drives multiple LED strings, motor H-bridges, and capacitive-touch keypads. For AEC-Q100-grade projects, Microchip offers dsPIC33 and PIC32 families in the same TQFP footprint. Designers should add proper ESD/EMI protection and load-dump tolerance on the supply rail for 12V automotive buses.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ256GU408T-I/PT — 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 | PIC24FJ256GU408-I/PT | PIC24FJ256GU410T-I/PT | PIC24FJ256GL408T-I/PT | PIC24FJ256GB610-I/PT |
|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 256 KB ECC | 256 KB ECC | 512 KB | 256 KB ECC | 256 KB |
| USB Controller | USB 2.0 Full-Speed Device/Host/OTG | USB 2.0 Full-Speed Device/Host/OTG | USB 2.0 Full-Speed Device/Host/OTG | USB 2.0 Full-Speed Device/Host/OTG | No on-chip USB |
| LCD Controller | Integrated segmented LCD | Integrated segmented LCD | Integrated segmented LCD | Integrated segmented LCD | Integrated graphics LCD |
| Core / Max Clock | PIC24F / 32 MHz (16 MIPS) | PIC24F / 32 MHz (16 MIPS) | PIC24F / 32 MHz (16 MIPS) | PIC24F / 32 MHz (16 MIPS) | PIC24F / 32 MHz |
| Low-Power Tech | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP (enhanced) | nanoWatt XLP |
主要差異化特點
- Integrated full-speed USB 2.0 with Device/Host/OTG (對比PIC24FJ256GB610-I/PT)
- 256 KB ECC Flash with Dual Partition OTA (對比PIC24FJ128GU408-I/PT)
- Low-power nanoWalt XLP technology with <1 µA deep sleep (對比PIC24FJ256GA110-I/PT)
設計說明
Estimated: at 32 MHz full activity, VDD = 3.3 V, the PIC24FJ256GU408T-I/PT typically draws 15-25 mA active, falling to <1 µA in deep sleep with full RAM retention (nanoWatt XLP). For USB-powered designs, place a 100 nF + 10 µF decoupling network close to VDD/VSS pins and a ferrite bead on VBUS if the device is USB bus-powered. Deep-sleep wake via RTCC, INT0, or USB-attached interrupt allows sub-100 µA average for battery applications. Always consult the family datasheet DS30010193 for exact figures.
The 80-TQFP (12x12 mm) package has a 0.5 mm pitch, requiring 4 mil trace/space design rules for fan-out. Place VDD/VSS decoupling caps directly under the IC on the opposite PCB layer using short vias. The USB D+/D- traces must be 90-ohm differential with no stubs; keep the ESD protection array within 5 mm of the USB connector. For the segmented LCD, route segment/com traces with a guard ground and avoid running them parallel to noisy digital lines to minimize crosstalk onto the LCD glass.
1) Pin remapping via PPS must be unlocked with the IOLOCK sequence or peripherals will not function. 2) The 256 KB Flash is dual-partition by default; firmware must implement the partition-swap bootloader protocol to enable OTA updates safely. 3) USB D+/D- require a 15 kohm pull-down on D+ for full-speed device mode; missing pull-down causes enumeration failure. 4) Industrial -I/PT variant supports -40C to +85C; operation outside this range voids specifications. 5) RTCC requires a 32.768 kHz crystal with specific load capacitance (typically 7 pF or 12.5 pF depending on board capacitance).
合規資訊
Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - for automotive AEC-Q100 designs use dsPIC33 or PIC32 AEC-Q100 variants. Microchip participates in the longevity program for industrial MCUs.