PIC24FJ256GL408-I/PT - 16-Bit MCU, 256KB Flash, LCD, USB | Microchip
MPN: PIC24FJ256GL408-I/PT ✓ NakahandaPIC24FJ256GL408-I/PT Ulas
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.
Mga alternatibo na pwedeng ilagay na PIC24FJ256GL408-I/PT — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC24FJ256GL408-I/PT (parehas na form factor at footprint) — pagkakaiba sa Package, ADC, USB, Core Architecture, LCD Controller.
PIC24FJ256GL408-E/PT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC24FJ128GL410-I/PT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC24FJ256GB610-I/PT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC24FJ256GL408-I/PT Mga Pinakamataas na Rating at Electrical Characteristics
| 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) |
| Volte ng Pagbibigay | 2.0 V to 3.6 V |
| Temperature na Operasyon | -40 C to +85 C (Industrial) |
| Packhaging | 80-TQFP (12x12 mm) |
| Uri ng Pagpapasok | 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 |
| Level ng MSL | 3 (168 hours) |
| Tindminan RoHS | Compliant |
| Pitch | 0.5 mm |
Pin Configuration ng PIC24FJ256GL408-I/PT
| Pin 1 | RP15/RD15 — Remappable I/O / Port D bit 15 |
| Pin 2 | RP14/RD14 — Remappable I/O / Port D bit 14 |
| Pin 3 | RP13/RD13 — Remappable I/O / Port D bit 13 |
| Pin 4 | RP12/RD12 — Remappable I/O / Port D bit 12 |
| Pin 5 | RP11/RD11 — Remappable I/O / Port D bit 11 |
| Pin 6 | RP10/RD10 — Remappable I/O / Port D bit 10 |
| Pin 7 | RP9/RD9 — Remappable I/O / Port D bit 9 |
| Pin 8 | RP8/RD8 — Remappable I/O / Port D bit 8 |
| Pin 9 | RP7/RD7 — Remappable I/O / Port D bit 7 |
| Pin 10 | RP6/RD6 — Remappable I/O / Port D bit 6 |
| Pin 11 | RP5/RD5 — Remappable I/O / Port D bit 5 |
| Pin 12 | RP4/RD4 — Remappable I/O / Port D bit 4 |
| Pin 13 | RP3/RD3 — Remappable I/O / Port D bit 3 |
| Pin 14 | RP2/RD2 — Remappable I/O / Port D bit 2 |
| Pin 15 | RP1/RD1 — Remappable I/O / Port D bit 1 |
| Pin 16 | RP0/RD0 — Remappable I/O / Port D bit 0 |
| Pin 17 | VCAP — Voltage regulator output decoupling |
| Pin 18 | RG15 — Port G bit 15 |
| Pin 19 | RG14 — Port G bit 14 |
| Pin 20 | VSS — Ground |
| Pin 21 | VDD — Supply voltage |
| Pin 22 | RG13 — Port G bit 13 |
| Pin 23 | RG12 — Port G bit 12 |
| Pin 24 | RG11 — Port G bit 11 |
| Pin 25 | RG10 — Port G bit 10 |
| Pin 26 | RG9 — Port G bit 9 |
| Pin 27 | RG8 — Port G bit 8 |
| Pin 28 | RG7 — Port G bit 7 |
| Pin 29 | RG6 — Port G bit 6 |
| Pin 30 | RG5 — Port G bit 5 |
| Pin 31 | RG4 — Port G bit 4 |
| Pin 32 | RG3 — Port G bit 3 |
| Pin 33 | RG2 — Port G bit 2 |
| Pin 34 | RG1 — Port G bit 1 |
| Pin 35 | RG0 — Port G bit 0 |
| Pin 36 | RA15 — Port A bit 15 |
| Pin 37 | RA14 — Port A bit 14 |
| Pin 38 | RA13 — Port A bit 13 |
| Pin 39 | RA12 — Port A bit 12 |
| Pin 40 | RA11 — Port A bit 11 |
| Pin 41 | RA10 — Port A bit 10 |
| Pin 42 | RA9 — Port A bit 9 |
| Pin 43 | RA8 — Port A bit 8 |
| Pin 44 | RA7 — Port A bit 7 |
| Pin 45 | RA6 — Port A bit 6 |
| Pin 46 | RA5 — Port A bit 5 |
| Pin 47 | RA4 — Port A bit 4 |
| Pin 48 | RA3 — Port A bit 3 |
| Pin 49 | RA2 — Port A bit 2 |
| Pin 50 | RA1 — Port A bit 1 |
| Pin 51 | RA0 — Port A bit 0 |
| Pin 52 | VSS — Ground |
| Pin 53 | VDD — Supply voltage |
| Pin 54 | RB15 — Port B bit 15 |
| Pin 55 | RB14 — Port B bit 14 |
| Pin 56 | RB13 — Port B bit 13 |
| Pin 57 | RB12 — Port B bit 12 |
| Pin 58 | RB11 — Port B bit 11 |
| Pin 59 | RB10 — Port B bit 10 |
| Pin 60 | RB9 — Port B bit 9 |
| Pin 61 | RB8 — Port B bit 8 |
| Pin 62 | RB7 — Port B bit 7 |
| Pin 63 | RB6 — Port B bit 6 |
| Pin 64 | RB5 — Port B bit 5 |
| Pin 65 | RB4 — Port B bit 4 |
| Pin 66 | RB3 — Port B bit 3 |
| Pin 67 | RB2 — Port B bit 2 |
| Pin 68 | RB1 — Port B bit 1 |
| Pin 69 | RB0 — Port B bit 0 |
| Pin 70 | VSS — Ground |
| Pin 71 | VDD — Supply voltage |
| Pin 72 | RC15 — Port C bit 15 |
| Pin 73 | RC14 — Port C bit 14 |
| Pin 74 | RC13 — Port C bit 13 |
| Pin 75 | RC12 — Port C bit 12 |
| Pin 76 | RC11 — Port C bit 11 |
| Pin 77 | RC10 — Port C bit 10 |
| Pin 78 | RC9 — Port C bit 9 |
| Pin 79 | RC8 — Port C bit 8 |
| Pin 80 | MCLR — Master clear (reset) |
Tipikal na mga Gamit
PIC24FJ256GL408-I/PT ay nararapat para sa 6 aplikasyons: 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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC24FJ256GL408-I/PT — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | 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 |
Pangunahing mga Pagkakaiba
- Dual-partition Flash with real-time OTA capability (kumpara saPIC24FJ128GL410-I/PT)
- Industrial temperature grade vs extended grade (kumpara saPIC24FJ256GL408-E/PT)
- More RAM than GL410 for buffering applications (kumpara saPIC24FJ128GL410-I/PT)
Talaan ng Disenyo
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.
Impormasyon ng Pagsunod sa Kautusan
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).
