PIC24FJ256GL408-I/PT - 16-Bit MCU, 256KB Flash, LCD, USB | Microchip
MPN: PIC24FJ256GL408-I/PT ✓ Hoạt độngPIC24FJ256GL408-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash/RAM), and programmable peripherals. The 'F' suffix indicates a Flash-based PIC24F device, while 'J' denotes the enhanced 16-bit core. Within the broader taxonomy, this part sits as: PIC24FJ → 16-bit MCU → microcontroller → embedded processor → semiconductor. This positioning makes it well-suited for human-machine interface (HMI) applications where integrated LCD drive and USB connectivity reduce system BOM.
Key features include core-independent peripherals (CIPs) such as Configurable Logic Cells (CLC), Multiple Output Capture/Compare/PWM, and a 12-bit ADC with up to 24 channels. The integrated segmented LCD driver supports up to 480 segments with contrast control, and hardware crypto accelerators (AES/SHA) are available on select family members. The 32MHz operation at 3.3V delivers 16 MIPS, while eXtreme Low-Power technology enables deep sleep currents in the microampere range for battery-operated designs.
Typical applications include industrial control panels, medical monitoring devices with LCD readouts, e-metering/HVAC thermostats, USB-connected sensor hubs, and OTA-updatable IoT edge nodes. The dual-partition Flash architecture is especially valuable for in-field firmware upgrades where maintaining a known-good image is critical.
When designing with this MCU, allocate pin mapping early since the 80-pin TQFP offers a generous but bounded I/O count. Use the integrated LCD charge pump to bias the display, and leverage the DMA engine to offload data movement from the core for sustained USB throughput.
Bộ thay thế dễ dàng lắp đặt cho PIC24FJ256GL408-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC24FJ256GL408-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, USB, Core Architecture, LCD Controller.
PIC24FJ256GL408-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ128GL410-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GB610-I/PT
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Xem tài liệu →PIC24FJ256GL408-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC24F (16-bit Harvard) |
| Program Flash | 256 KB (256K x 8) with ECC |
| RAM | 32 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Điện áp cung cấp | 2.0 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 80-TQFP (12x12 mm) |
| Kiểu lắp đặt | Surface Mount |
| ADC | 12-bit, up to 24 channels |
| USB | Full-Speed USB 2.0 (Device/Host/OTG) |
| LCD Controller | Integrated segment LCD, up to 480 segments |
| Core-Independent Peripherals | CLC, MCCP, DMA, CRC |
| Crypto Acceleration | AES/SHA (family feature) |
| Flash Partitioning | Dual Partition, OTA support, EEPROM emulation |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Pitch | 0.5 mm |
Cấu hình chân PIC24FJ256GL408-I/PT
| Chân 1 | RP15/RD15 — Remappable I/O / Port D bit 15 |
| Chân 2 | RP14/RD14 — Remappable I/O / Port D bit 14 |
| Chân 3 | RP13/RD13 — Remappable I/O / Port D bit 13 |
| Chân 4 | RP12/RD12 — Remappable I/O / Port D bit 12 |
| Chân 5 | RP11/RD11 — Remappable I/O / Port D bit 11 |
| Chân 6 | RP10/RD10 — Remappable I/O / Port D bit 10 |
| Chân 7 | RP9/RD9 — Remappable I/O / Port D bit 9 |
| Chân 8 | RP8/RD8 — Remappable I/O / Port D bit 8 |
| Chân 9 | RP7/RD7 — Remappable I/O / Port D bit 7 |
| Chân 10 | RP6/RD6 — Remappable I/O / Port D bit 6 |
| Chân 11 | RP5/RD5 — Remappable I/O / Port D bit 5 |
| Chân 12 | RP4/RD4 — Remappable I/O / Port D bit 4 |
| Chân 13 | RP3/RD3 — Remappable I/O / Port D bit 3 |
| Chân 14 | RP2/RD2 — Remappable I/O / Port D bit 2 |
| Chân 15 | RP1/RD1 — Remappable I/O / Port D bit 1 |
| Chân 16 | RP0/RD0 — Remappable I/O / Port D bit 0 |
| Chân 17 | VCAP — Voltage regulator output decoupling |
| Chân 18 | RG15 — Port G bit 15 |
| Chân 19 | RG14 — Port G bit 14 |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Supply voltage |
| Chân 22 | RG13 — Port G bit 13 |
| Chân 23 | RG12 — Port G bit 12 |
| Chân 24 | RG11 — Port G bit 11 |
| Chân 25 | RG10 — Port G bit 10 |
| Chân 26 | RG9 — Port G bit 9 |
| Chân 27 | RG8 — Port G bit 8 |
| Chân 28 | RG7 — Port G bit 7 |
| Chân 29 | RG6 — Port G bit 6 |
| Chân 30 | RG5 — Port G bit 5 |
| Chân 31 | RG4 — Port G bit 4 |
| Chân 32 | RG3 — Port G bit 3 |
| Chân 33 | RG2 — Port G bit 2 |
| Chân 34 | RG1 — Port G bit 1 |
| Chân 35 | RG0 — Port G bit 0 |
| Chân 36 | RA15 — Port A bit 15 |
| Chân 37 | RA14 — Port A bit 14 |
| Chân 38 | RA13 — Port A bit 13 |
| Chân 39 | RA12 — Port A bit 12 |
| Chân 40 | RA11 — Port A bit 11 |
| Chân 41 | RA10 — Port A bit 10 |
| Chân 42 | RA9 — Port A bit 9 |
| Chân 43 | RA8 — Port A bit 8 |
| Chân 44 | RA7 — Port A bit 7 |
| Chân 45 | RA6 — Port A bit 6 |
| Chân 46 | RA5 — Port A bit 5 |
| Chân 47 | RA4 — Port A bit 4 |
| Chân 48 | RA3 — Port A bit 3 |
| Chân 49 | RA2 — Port A bit 2 |
| Chân 50 | RA1 — Port A bit 1 |
| Chân 51 | RA0 — Port A bit 0 |
| Chân 52 | VSS — Ground |
| Chân 53 | VDD — Supply voltage |
| Chân 54 | RB15 — Port B bit 15 |
| Chân 55 | RB14 — Port B bit 14 |
| Chân 56 | RB13 — Port B bit 13 |
| Chân 57 | RB12 — Port B bit 12 |
| Chân 58 | RB11 — Port B bit 11 |
| Chân 59 | RB10 — Port B bit 10 |
| Chân 60 | RB9 — Port B bit 9 |
| Chân 61 | RB8 — Port B bit 8 |
| Chân 62 | RB7 — Port B bit 7 |
| Chân 63 | RB6 — Port B bit 6 |
| Chân 64 | RB5 — Port B bit 5 |
| Chân 65 | RB4 — Port B bit 4 |
| Chân 66 | RB3 — Port B bit 3 |
| Chân 67 | RB2 — Port B bit 2 |
| Chân 68 | RB1 — Port B bit 1 |
| Chân 69 | RB0 — Port B bit 0 |
| Chân 70 | VSS — Ground |
| Chân 71 | VDD — Supply voltage |
| Chân 72 | RC15 — Port C bit 15 |
| Chân 73 | RC14 — Port C bit 14 |
| Chân 74 | RC13 — Port C bit 13 |
| Chân 75 | RC12 — Port C bit 12 |
| Chân 76 | RC11 — Port C bit 11 |
| Chân 77 | RC10 — Port C bit 10 |
| Chân 78 | RC9 — Port C bit 9 |
| Chân 79 | RC8 — Port C bit 8 |
| Chân 80 | MCLR — Master clear (reset) |
Ứng dụng tiêu biểu
PIC24FJ256GL408-I/PT phù hợp cho 6 Áp dụngs: Industrial HMI Control Panels, Medical Monitoring Devices, E-Metering and Smart Thermostats, USB Sensor Hubs and Data Loggers, OTA-Updatable IoT Edge Nodes, Automotive Dashboard Sub-Displays.
Industrial HMI Control Panels
The PIC24FJ256GL408-I/PT is purpose-built for industrial HMI panels where its 480-segment integrated LCD controller eliminates external LCD driver ICs, while the 256KB ECC Flash stores multilingual UI strings and 32KB RAM handles real-time keypad/scanning buffers. CIPs (CLC, MCCP) offload rotary-encoder decoding and PWM backlight control from the core, keeping CPU headroom available for communication stacks. The 32 MHz / 16 MIPS throughput drives Modbus RTU / CAN-FD / RS-485 transactions concurrently. Deep sleep currents in the microampere range extend battery-backed operation in 4-20 mA loop-powered field instruments.
Được đề xuất
Medical Monitoring Devices
Medical devices such as glucose meters, pulse oximeters, and portable ECGs benefit from the PIC24FJ256GL408-I/PT's 256KB ECC Flash for storing patient-history logs, the 32KB RAM for sampling buffers, and the eXtreme Low-Power idle modes for extended battery life. The 12-bit ADC with up to 24 channels handles multi-sensor analog front-ends, while Full-Speed USB enables tethered data upload to host PCs. The industrial -40 C to +85 C temperature grade supports point-of-care deployment. Hardware AES/SHA on family members enables secure patient-data at rest.
Được đề xuất
E-Metering and Smart Thermostats
The PIC24FJ256GL408-I/PT fits e-metering and HVAC thermostat designs where its dual-partition Flash with OTA capability is critical for remote firmware updates in deployed units. The 12-bit ADC accurately measures CT-derived current and AC-line voltage, while the integrated LCD drives segmented consumption displays without external driver chips. The 32KB RAM buffers energy-usage profiles, and the on-chip RTC with calendar simplifies time-of-use (TOU) tariff logic. Industrial temperature range ensures operation in unconditioned outdoor meter enclosures.
Được đề xuất
USB Sensor Hubs and Data Loggers
Full-Speed USB 2.0 (Device/Host/OTG) on the PIC24FJ256GL408-I/PT enables USB sensor hubs that interface to a host PC for data aggregation and configuration. The 256KB Flash stores logging firmware and calibration tables, while 32KB RAM buffers multi-channel sensor samples before USB transmission. DMA channels offload packet assembly from the core, sustaining USB throughput at 12 Mbps even with concurrent ADC sampling. The 80-pin TQFP exposes ample GPIO for multi-sensor I/O expansion.
Được đề xuất
OTA-Updatable IoT Edge Nodes
The PIC24FJ256GL408-I/PT's dual-partition Flash architecture is ideal for IoT edge nodes requiring real-time Over-The-Air firmware updates without service interruption - one partition runs while the other is being reprogrammed, then a bootloader atomic swap occurs. 256KB Flash holds full application plus OTA staging area; 32KB RAM buffers MQTT/TLS packets. eXtreme Low-Power sleep modes (down to <1 uA with RTC running) extend coin-cell or solar-powered lifetime. Hardware crypto on family members secures OTA payloads.
Được đề xuất
Automotive Dashboard Sub-Displays
While the -I/PT industrial grade suits passenger-cabin accessories, the PIC24FJ256GL408-I/PT serves automotive dashboard sub-displays for non-safety-critical readouts like HVAC settings, audio status, or trip computers. The 480-segment LCD controller drives TN/STN segmented panels directly, while 32KB RAM handles multi-page UI buffers. USB OTG enables media-player connectivity. The 32 MHz core sustains LIN-bus communication, button matrix scanning, and display refresh concurrently via DMA and CIPs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC24FJ256GL408-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC24FJ256GL408-E/PT | PIC24FJ128GL410-I/PT | PIC24FJ256GB610-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (PT) 12x12 mm | 80-TQFP (PT) 12x12 mm - same | 80-TQFP (PT) 12x12 mm - same | 80-TQFP (PT) 12x12 mm - same |
| Program Flash | 256 KB ECC | 256 KB ECC | 128 KB ECC | 256 KB ECC |
| RAM | 32 KB | 32 KB | 8 KB | 64 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| USB | Full-Speed USB 2.0 | Full-Speed USB 2.0 | Full-Speed USB 2.0 | Full-Speed USB 2.0 |
| LCD Controller | Up to 480 segments | Up to 480 segments | Up to 320 segments | Up to 480 segments |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Dual-partition Flash with real-time OTA capability (vsPIC24FJ128GL410-I/PT)
- Industrial temperature grade vs extended grade (vsPIC24FJ256GL408-E/PT)
- More RAM than GL410 for buffering applications (vsPIC24FJ128GL410-I/PT)
Ghi chú thiết kế
Route the 80-TQFP (12x12 mm, 0.5 mm pitch) with a 4-layer PCB using a continuous ground plane beneath the package. Place 0.1 uF + 10 uF decoupling capacitors as close as possible to each VDD/VSS pair (pins 21/20, 53/52, 71/70) to suppress switching noise on the internal 1.8V regulator. Keep the VCAP pin (pin 17) trace short and isolated from noisy signal traces.
Take advantage of eXtreme Low-Power modes (Sleep, Deep Sleep, Retention) for battery-powered designs. Current draw in Deep Sleep with RTC running is typically <1 uA per the PIC24FJ GL4 datasheet. Use the on-chip LVD/LVR (Low-Voltage Detect/Reset) to gracefully handle brownout conditions, and configure the on-chip voltage regulator's BOR threshold via the configuration bits.
Allocate the LCD segment pins (shared with Port G and other multiplexed pins) early in the schematic phase because re-mapping after PCB layout requires complete board rework. Use the segmented-LCD pin manager in MPLAB X IDE to validate the segment-to-pin map before committing to layout. Maintain equal trace lengths on the LCD segment/com lines to minimize ghosting and ensure uniform contrast.
Do not leave unused I/O pins floating - configure them as outputs driven low or as inputs with the internal weak pull-up enabled to minimize current leakage in sleep mode. The MCLR pin (pin 80) must have a 10 kohm pull-up to VDD; failure to do so results in spurious resets. Also ensure the VDDCORE pin has its own 10 uF + 0.1 uF decoupling pair for the internal regulator.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40 C to +85 C; not AEC-Q100 qualified (choose PIC24FJ256GL408-E/PT or -H/PT for higher grades).
