PIC24FJ256GL406T-I/MR - 16-bit MCU, 256KB Flash, USB, LCD | Microchip
MPN： PIC24FJ256GL406T-I/MR ✓ 啟用中PIC24FJ256GL406T-I/MR 概覽
A 16-bit PIC microcontroller is a member of the higher-performance 16-bit MCU category, sitting between 8-bit AVR/PIC MCUs and 32-bit ARM Cortex-M devices. Within the system hierarchy, PIC24F parts belong to the Microcontroller > Embedded Processor > Integrated Circuit taxonomy. The 16-bit modified Harvard architecture balances deterministic interrupt response, rich peripherals, and low power - making PIC24F MCUs common in consumer appliances, industrial sensors, USB human-interface devices, and battery-powered metering where 8-bit cores are too slow but 32-bit MCUs are over-spec.
Key features include hardware crypto engine, segmented LCD controller for up to 512 pixels, 12-bit ADC with 16 channels, multiple UART/SPI/I2C interfaces, and eXtreme Low Power (XLP) sleep modes drawing under 1 uA. The dual-partition Flash and EEPROM emulation reduce BOM cost by eliminating external memory chips. The 64-QFN package offers compact layout for space-constrained HMI modules.
Typical applications include secure IoT nodes with OTA firmware, USB HID peripherals, metering displays with LCD, automotive AEC-Q100 dashboard sub-modules, and low-power sensor hubs. The wide peripheral integration reduces external components, supporting compact PCB designs with fewer layers.
Design tip: the dual-partition Flash requires careful linker script configuration to partition A/B blocks correctly. Refer to Microchip application note TB3134 for OTA reference implementation patterns. AECs and standard PIC24F IDE toolchains (MPLAB X, XC16 compiler) support this device fully.
直接替換替代品，適用於 PIC24FJ256GL406T-I/MR — 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： PIC24FJ256GL406T-I/MR （相同外形與佔位） — 差異在於 Package, ADC, USB, Operating Temperature, I/O Pins.
PIC24FJ256GL406-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GL406T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GL406-E/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ128GL406-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GU406-I/MR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC24FJ256GA406-I/MR
✅ 直接替換聯絡詢價
查看資料表 →PIC24FJ256GL406T-I/MR 最大額定值與電氣特性
| Core Architecture | PIC 16-bit modified Harvard |
| CPU Speed (MIPS) | 16 MIPS |
| Clock Frequency | 32 MHz max |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Flash Type | Dual-partition Flash with ECC |
| EEPROM Emulation | Yes (in Flash) |
| USB | USB 2.0 Full-Speed |
| LCD Controller | Segmented LCD, up to 512 pixels |
| ADC | 12-bit, 16 channels |
| 封裝 | 64-pin QFN (9x9 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| RoHS 狀態 | Compliant |
| AEC-Q100 | Qualified (Automotive grade variant) |
PIC24FJ256GL406T-I/MR 腳位配置
| 腳位 1 | RB0/AN0 — Port B bit 0 / ADC analog input 0 |
| 腳位 2 | RB1/AN1 — Port B bit 1 / ADC analog input 1 |
| 腳位 3 | RB2/AN2 — Port B bit 2 / ADC analog input 2 |
| 腳位 4 | RB3/AN3 — Port B bit 3 / ADC analog input 3 |
| 腳位 5 | VSS — Ground |
| 腳位 6 | VDD — Positive supply |
| 腳位 7 | RB4/AN4 — Port B bit 4 / ADC analog input 4 |
| 腳位 8 | RB5/AN5 — Port B bit 5 / ADC analog input 5 |
| 腳位 9 | RB6/AN6 — Port B bit 6 / ADC analog input 6 |
| 腳位 10 | RB7/AN7 — Port B bit 7 / ADC analog input 7 |
| 腳位 11 | RC0 — Port C bit 0 |
| 腳位 12 | RC1 — Port C bit 1 |
| 腳位 13 | RC2 — Port C bit 2 |
| 腳位 14 | RC3 — Port C bit 3 |
| 腳位 15 | RC4 — Port C bit 4 |
| 腳位 16 | RC5 — Port C bit 5 |
| 腳位 17 | RC6 — Port C bit 6 |
| 腳位 18 | RC7 — Port C bit 7 |
| 腳位 19 | VSS — Ground |
| 腳位 20 | VDD — Positive supply |
| 腳位 21 | RD0 — Port D bit 0 |
| 腳位 22 | RD1 — Port D bit 1 |
| 腳位 23 | RD2 — Port D bit 2 |
| 腳位 24 | RD3 — Port D bit 3 |
| 腳位 25 | RD4 — Port D bit 4 |
| 腳位 26 | RD5 — Port D bit 5 |
| 腳位 27 | RD6 — Port D bit 6 |
| 腳位 28 | RD7 — Port D bit 7 |
| 腳位 29 | RE0 — Port E bit 0 |
| 腳位 30 | RE1 — Port E bit 1 |
| 腳位 31 | RE2 — Port E bit 2 |
| 腳位 32 | RE3 — Port E bit 3 |
| 腳位 33 | RE4 — Port E bit 4 |
| 腳位 34 | RE5 — Port E bit 5 |
| 腳位 35 | RE6 — Port E bit 6 |
| 腳位 36 | RE7 — Port E bit 7 |
| 腳位 37 | RF0 — Port F bit 0 |
| 腳位 38 | RF1 — Port F bit 1 |
| 腳位 39 | RF2 — Port F bit 2 |
| 腳位 40 | RF3 — Port F bit 3 |
| 腳位 41 | RF4 — Port F bit 4 |
| 腳位 42 | RF5 — Port F bit 5 |
| 腳位 43 | RF6 — Port F bit 6 |
| 腳位 44 | RF7 — Port F bit 7 |
| 腳位 45 | RG0 — Port G bit 0 |
| 腳位 46 | RG1 — Port G bit 1 |
| 腳位 47 | RG2 — Port G bit 2 |
| 腳位 48 | RG3 — Port G bit 3 |
| 腳位 49 | RG6 — Port G bit 6 |
| 腳位 50 | RG7 — Port G bit 7 |
| 腳位 51 | RG8 — Port G bit 8 |
| 腳位 52 | RG9 — Port G bit 9 |
| 腳位 53 | MCLR — Master clear reset input |
| 腳位 54 | OSC1 — Oscillator input |
| 腳位 55 | OSC2 — Oscillator output |
| 腳位 56 | SOSCO — Secondary oscillator output |
| 腳位 57 | SOSCI — Secondary oscillator input |
| 腳位 58 | D+ — USB D+ data line |
| 腳位 59 | D- — USB D- data line |
| 腳位 60 | VBUS — USB VBUS detect |
| 腳位 61 | VUSB — USB internal regulator output |
| 腳位 62 | AVDD — Analog supply |
| 腳位 63 | AVSS — Analog ground |
| 腳位 64 | EP — Exposed thermal pad (connect to ground) |
典型應用
PIC24FJ256GL406T-I/MR 適用於 6 應用s: Secure IoT Sensor Nodes with OTA, USB HID Peripherals, Metering Displays with LCD, Automotive Dashboard Sub-modules, Industrial Sensor Hubs, Low-Power Wearable Devices.
Secure IoT Sensor Nodes with OTA
The PIC24FJ256GL406T-I/MR's 256 KB dual-partition Flash with ECC is purpose-built for IoT endpoints that need reliable over-the-air firmware upgrades. The 32 KB SRAM accommodates TLS/DTLS stacks, and the XLP sleep modes drop current below 1 uA for battery longevity over multi-year deployments. Engineers typically pair this MCU with an ATECC608B secure element and an RN4871 BLE module for complete wireless nodes.
推薦
USB HID Peripherals
With on-chip USB 2.0 full-speed, internal 3.3V regulator, and 16 MIPS of CPU throughput, the PIC24FJ256GL406T-I/MR is ideal for USB keyboards, mice, game controllers, and custom HID-class devices. The internal pull-up resistors eliminate external components, and 32 KB SRAM comfortably handles USB descriptors and protocol stacks. Reference Microchip AN1227 for HID firmware templates and USB stack integration.
推薦
Metering Displays with LCD
The integrated segmented LCD controller drives up to 512 pixels, supporting multi-digit utility meters, weigh scales, and home appliance HMIs. The 256 KB Flash stores multilingual display fonts and metering firmware, while the 16-channel 12-bit ADC reads sensor inputs at 200 ksps. A typical reference design uses a 4x40 segment LCD and an SPI-connected ePaper backup display for redundancy.
推薦
Automotive Dashboard Sub-modules
AEC-Q100 qualified variants of the GL406 family suit automotive interior sub-modules such as climate controls, mirror modules, and steering-wheel switch readers. The wide operating temperature range and robust ESD performance meet OEM requirements. The 32 KB SRAM buffers CAN/LIN communication, and the segmented LCD driver supports instrument-cluster style displays. Reference Microchip AN2821 for automotive touch-button design.
推薦
Industrial Sensor Hubs
The PIC24FJ256GL406T-I/MR's CIPs (Core Independent Peripherals) like CLC, PWM, and event system enable sensor-fusion hubs that wake on threshold events without CPU intervention. Industrial sensors, Modbus gateways, and predictive-maintenance nodes benefit from sub-microamp sleep currents and deterministic 16 MIPS performance. Reference TB3134 for OTA reference implementation in industrial settings.
推薦
Low-Power Wearable Devices
Battery-powered wearables such as fitness bands, hearing-aid remote controls, and medical monitors benefit from the GL406's XLP modes and integrated segmented LCD. The 256 KB Flash accommodates BLE stack libraries and application code simultaneously, and the 64-QFN's 9x9 mm footprint suits compact enclosures. Total quiescent current under 1 uA extends coin-cell operation to multi-year life.
推薦
推薦產品摘要
工程參考資料，適用於 PIC24FJ256GL406T-I/MR — 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 | PIC24FJ256GL406-I/MR | PIC24FJ256GL406T-I/PT | PIC24FJ128GL406-I/MR | PIC24FJ256GA406-I/MR |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) | 64-TQFP (10x10 mm) | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 256 KB | 256 KB | 256 KB | 128 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| Dual-Partition Flash | Yes | Yes | Yes | Yes | No |
| USB | Full-Speed | Full-Speed | Full-Speed | Full-Speed | Full-Speed |
| LCD Controller | Yes (segmented) | Yes (segmented) | Yes (segmented) | Yes (segmented) | Yes (segmented) |
| Automotive Qualified | Yes (AEC-Q100) | Industrial | Yes (AEC-Q100) | Industrial | Industrial |
主要差異化特點
- Dual-partition Flash with ECC (對比PIC24FJ256GA406-I/MR)
- Higher RAM capacity (對比PIC24FJ256GA406-I/MR)
- Automotive grade option in same package (對比PIC24FJ128GL406-I/MR)
設計說明
Place 100 nF and 10 uF decoupling capacitors as close as possible to every VDD/VSS pin pair of the PIC24FJ256GL406T-I/MR. The device includes an internal USB voltage regulator (VUSB pin) which also requires its own 1 uF decoupling cap. According to Microchip TB3134, placing a ferrite bead on VUSB prevents noise coupling into analog sections.
The 64-QFN package exposes a thermal pad (EP) on pin 64 that must be soldered to a copper pour on the PCB for heat dissipation. Estimated: at 32 MHz full-speed operation with all peripherals active, typical current draw is 25-30 mA. Thermal resistance theta_JA is approximately 28 C/W for the 9x9 mm QFN with proper pad soldering, keeping junction rise well below 10 C in most use cases.
Keep the USB D+/D- traces short, matched in length, and routed over a continuous ground plane for 90 ohm differential impedance. Avoid stubs and vias in the USB differential pair. According to Microchip AN1227, the VBUS detect pin should be tied through a divider to monitor USB attach events; EMI common-mode chokes are recommended for FCC compliance on production boards.
Do not forget to configure the dual-partition Flash linker script for OTA updates - the default linker maps code to a single partition and breaks OTA. The MCLR pin requires a 10 kohm pull-up to VDD; leaving it floating can cause spurious resets. Configure the SOSC pins for secondary oscillator use or leave them NC with SOSC disabled in configuration bits to avoid power consumption.
合規資訊
AEC-Q100 qualified for automotive per DigiKey listing 12177854. RoHS and REACH compliant. Lead-free and halogen-free packaging per Microchip product literature.
