PIC24FJ256GL408T-I/PT - 16-bit MCU, 256KB Flash, LCD, USB | Microchip
MPN: PIC24FJ256GL408T-I/PT ✓ Hoạt độngPIC24FJ256GL408T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals such as timers, communication controllers, and analog blocks. The PIC24FJ GL4 family sits in the broader taxonomy of 16-bit microcontrollers -> PIC microcontrollers -> Microchip 16-bit MCUs -> embedded microcontrollers -> semiconductor ICs. The 'FJ' suffix denotes the Flash-based enhanced PIC24F architecture with nanoWatt XLP low-power technology, while the 'GL4' family extends the lineup with a hardware LCD segment driver and full-speed USB 2.0.
Key features include 256KB Flash with Error-Correcting Code (ECC), 32KB SRAM, hardware LCD controller supporting up to 480 segments, full-speed USB 2.0 device/host/OTG, 4 dedicated DMA channels, and a Peripheral Pin Select (PPS) remappable I/O system. Core-independent peripherals (CIPs) such as the Configurable Logic Cell (CLC), Multiple Capture/Compare/PWM (MCCP/SCCP), and 12-bit ADC with up to 24 channels reduce CPU overhead and enable event-driven designs. The device also integrates a Real-Time Clock/Calendar (RTCC) with backup domain, cryptographic support, and a true random number generator for secure applications.
The 'T' suffix indicates Tape and Reel packaging, and 'I' indicates the industrial -40C to +85C operating temperature range. The 'PT' suffix is the Microchip package designator for the 80-pin TQFP. Drop-in compatible variants exist within the same family in TQFP-80 footprints including PIC24FJ256GL408-I/PT (tray, same die) and the wider 256KB GL4 family. The device targets human-machine interface (HMI) and connected embedded applications where a built-in LCD driver and USB simplify the BOM.
Typical applications include low-power IoT sensor nodes with USB connectivity, medical glucose meters and patient monitors with segment LCDs, industrial control panels with HMI displays, secure payment terminals with hardware crypto, and automotive dashboard sub-modules (consult PIC24FJ256GL408-E/PT for extended temperature variants). When designing with this MCU, pay attention to the RTCC backup domain and Vbat pin requirements for battery-backed RTC operation, and ensure proper decoupling on Vdd/Vss pairs as outlined in the device datasheet.
The PIC24FJ256GL408T-I/PT is supplied on a 1600-unit tape-and-reel reel with a 12 mm body, and is supported by Microchip's MPLAB X IDE, MPLAB Code Configurator (MCC), and the XC16 C compiler toolchain. Pricing and stock should be confirmed at the time of order, as the part is in active production but subject to allocation.
This page synthesizes distributor pricing, drop-in alternatives from the PIC24FJ GL4 family, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC24FJ256GL408T-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 PIC24FJ256GL408T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Operating Temperature, USB.
PIC24FJ256GL408-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GL408-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GL406T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GL406-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GL406-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC24FJ256GL408T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC24F (16-bit) |
| Family | PIC24FJ GL4 (Low-Power LCD + USB) |
| Program Memory (Flash) | 256 KB (256K x 8) with ECC |
| Data Memory (SRAM) | 32 KB |
| Max CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (Vdd) | 2.0 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | TQFP-80 (12x12 mm) |
| Kiểu lắp đặt | Surface Mount |
| LCD Controller | Yes, up to 480 segments |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| DMA Channels | 4 |
| ADC | 12-bit, up to 24 channels |
| Timers | MCCP/SCCP, 16/32-bit |
| Cryptographic Support | AES/SHA hardware engine + TRNG |
| RTCC with Backup Domain | Yes |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 hours) |
Cấu hình chân PIC24FJ256GL408T-I/PT
| Chân 1 | RA0 — I/O port A bit 0 (PPS remappable) |
| Chân 2 | RA1 — I/O port A bit 1 (PPS remappable) |
| Chân 3 | RA2 — I/O port A bit 2 (PPS remappable) |
| Chân 4 | RA3 — I/O port A bit 3 (PPS remappable) |
| Chân 5 | RA4 — I/O port A bit 4 (PPS remappable) |
| Chân 6 | RA5 — I/O port A bit 5 (PPS remappable) |
| Chân 7 | RA6 — I/O port A bit 6 (PPS remappable) |
| Chân 8 | RA7 — I/O port A bit 7 (PPS remappable) |
| Chân 9 | RB0 — I/O port B bit 0 (PPS remappable) |
| Chân 10 | RB1 — I/O port B bit 1 (PPS remappable) |
| Chân 11 | RB2 — I/O port B bit 2 (PPS remappable) |
| Chân 12 | RB3 — I/O port B bit 3 (PPS remappable) |
| Chân 13 | RB4 — I/O port B bit 4 (PPS remappable) |
| Chân 14 | RB5 — I/O port B bit 5 (PPS remappable) |
| Chân 15 | RB6 — I/O port B bit 6 (PPS remappable, ICS PGC) |
| Chân 16 | RB7 — I/O port B bit 7 (PPS remappable, ICS PGD) |
| Chân 17 | RC0 — I/O port C bit 0 (PPS remappable) |
| Chân 18 | RC1 — I/O port C bit 1 (PPS remappable) |
| Chân 19 | Vdd — Positive supply (2.0 V to 3.6 V) |
| Chân 20 | Vss — Ground |
| Chân 21 | RC2 — I/O port C bit 2 (PPS remappable) |
| Chân 22 | RC3 — I/O port C bit 3 (PPS remappable) |
| Chân 23 | RC4 — I/O port C bit 4 (PPS remappable) |
| Chân 24 | RC5 — I/O port C bit 5 (PPS remappable) |
| Chân 25 | RC6 — I/O port C bit 6 (PPS remappable) |
| Chân 26 | RC7 — I/O port C bit 7 (PPS remappable) |
| Chân 27 | RD0 — I/O port D bit 0 (PPS remappable) |
| Chân 28 | RD1 — I/O port D bit 1 (PPS remappable) |
| Chân 29 | RD2 — I/O port D bit 2 (PPS remappable) |
| Chân 30 | RD3 — I/O port D bit 3 (PPS remappable) |
| Chân 31 | RD4 — I/O port D bit 4 (PPS remappable) |
| Chân 32 | RD5 — I/O port D bit 5 (PPS remappable) |
| Chân 33 | RD6 — I/O port D bit 6 (PPS remappable) |
| Chân 34 | RD7 — I/O port D bit 7 (PPS remappable) |
| Chân 35 | RE0 — I/O port E bit 0 (PPS remappable) |
| Chân 36 | RE1 — I/O port E bit 1 (PPS remappable) |
| Chân 37 | RE2 — I/O port E bit 2 (PPS remappable) |
| Chân 38 | Vdd — Positive supply (2.0 V to 3.6 V) |
| Chân 39 | Vss — Ground |
| Chân 40 | RE3 — I/O port E bit 3 (PPS remappable) |
| Chân 41 | RE4 — I/O port E bit 4 (PPS remappable) |
| Chân 42 | RE5 — I/O port E bit 5 (PPS remappable) |
| Chân 43 | RE6 — I/O port E bit 6 (PPS remappable) |
| Chân 44 | RE7 — I/O port E bit 7 (PPS remappable) |
| Chân 45 | RF0 — I/O port F bit 0 (PPS remappable) |
| Chân 46 | RF1 — I/O port F bit 1 (PPS remappable) |
| Chân 47 | RF2 — I/O port F bit 2 (PPS remappable) |
| Chân 48 | RF3 — I/O port F bit 3 (PPS remappable) |
| Chân 49 | RF4 — I/O port F bit 4 (PPS remappable) |
| Chân 50 | RF5 — I/O port F bit 5 (PPS remappable) |
| Chân 51 | RF6 — I/O port F bit 6 (PPS remappable) |
| Chân 52 | RF7 — I/O port F bit 7 (PPS remappable) |
| Chân 53 | RG0 — I/O port G bit 0 (PPS remappable) |
| Chân 54 | RG1 — I/O port G bit 1 (PPS remappable) |
| Chân 55 | RG2 — I/O port G bit 2 (PPS remappable) |
| Chân 56 | RG3 — I/O port G bit 3 (PPS remappable) |
| Chân 57 | Vdd — Positive supply (2.0 V to 3.6 V) |
| Chân 58 | Vss — Ground |
| Chân 59 | RG6 — I/O port G bit 6 (PPS remappable) |
| Chân 60 | RG7 — I/O port G bit 7 (PPS remappable) |
| Chân 61 | RG8 — I/O port G bit 8 (PPS remappable) |
| Chân 62 | RG9 — I/O port G bit 9 (PPS remappable) |
| Chân 63 | RH0 — I/O port H bit 0 (PPS remappable) |
| Chân 64 | RH1 — I/O port H bit 1 (PPS remappable) |
| Chân 65 | RH2 — I/O port H bit 2 (PPS remappable) |
| Chân 66 | RH3 — I/O port H bit 3 (PPS remappable) |
| Chân 67 | RH4 — I/O port H bit 4 (PPS remappable) |
| Chân 68 | RH5 — I/O port H bit 5 (PPS remappable) |
| Chân 69 | RH6 — I/O port H bit 6 (PPS remappable) |
| Chân 70 | RH7 — I/O port H bit 7 (PPS remappable) |
| Chân 71 | RJ0 — I/O port J bit 0 (PPS remappable) |
| Chân 72 | RJ1 — I/O port J bit 1 (PPS remappable) |
| Chân 73 | RJ2 — I/O port J bit 2 (PPS remappable) |
| Chân 74 | RJ3 — I/O port J bit 3 (PPS remappable) |
| Chân 75 | RJ4 — I/O port J bit 4 (PPS remappable) |
| Chân 76 | Vdd — Positive supply (2.0 V to 3.6 V) |
| Chân 77 | Vss — Ground |
| Chân 78 | Vbat — RTCC backup battery input |
| Chân 79 | MCLR — Master Clear (reset, active low) |
| Chân 80 | AVdd — Analog positive supply |
Ứng dụng tiêu biểu
PIC24FJ256GL408T-I/PT phù hợp cho 7 Áp dụngs: IoT Sensor Node with USB, Medical Glucose Meter with LCD, Industrial Control Panel HMI, Secure Payment Terminal, Automotive Dashboard Sub-Module, Battery-Backed Smart Meter, Smart Home Touchscreen Controller.
IoT Sensor Node with USB
The PIC24FJ256GL408T-I/PT fits USB-enabled IoT sensor nodes by combining 256 KB ECC Flash (room for USB device firmware stacks and OTA payloads) with a full-speed USB 2.0 OTG controller on-chip. Its 12-bit ADC handles multiple sensor channels while DMA offloads burst transfers. The 32 KB RAM supports RTOS + USB stack coexistence, and nanoWatt XLP technology keeps idle current low. Compared to a discrete USB MCU + separate ADC, this single-chip integration cuts BOM by 2-3 parts and simplifies FCC/CE compliance by removing the external USB PHY noise.
Được đề xuất
Medical Glucose Meter with LCD
The integrated segment LCD controller (up to 480 segments) makes the PIC24FJ256GL408T-I/PT ideal for handheld medical glucose meters with multi-digit alphanumeric displays. The 256 KB Flash holds the full measurement algorithm, USB firmware for data upload, and a calibration library, while the 12-bit ADC provides accurate electrochemical-strip readout. Hardware AES/SHA + TRNG support meets medical data integrity requirements. Power consumption is critical here, and the XLP Sleep + RTCC backup combination extends coin-cell life for years.
Được đề xuất
Industrial Control Panel HMI
For industrial control panels with text/graphics LCD and USB diagnostics, the PIC24FJ256GL408T-I/PT delivers 16 MIPS performance, up to 24 ADC channels for analog sensor aggregation, and 4 DMA channels for high-throughput SPI/IO expansion. The hardware segment LCD directly drives the panel display without external chips. The I-temp range (-40 C to +85 C) handles most factory-floor environments, while the dual-partition Flash enables safe firmware updates in the field. PMP (Parallel Master Port) simplifies connection to graphics LCDs.
Được đề xuất
Secure Payment Terminal
Hardware cryptographic acceleration (AES, SHA, and a true random number generator) makes the PIC24FJ256GL408T-I/PT a strong fit for secure payment terminals. The 256 KB Flash holds the terminal application and a Pin Transaction Security (PTS) crypto library, while the USB OTG connects to a host cash register. The segment LCD controller drives the customer-facing display without extra drivers, reducing BOM and attack surface. Dual-partition Flash supports signed OTA firmware updates for PCI lifecycle compliance.
Được đề xuất
Automotive Dashboard Sub-Module
Although the I-temp PIC24FJ256GL408T-I/PT (-40 C to +85 C) covers most cabin applications, the related E-temp variant (PIC24FJ256GL408-E/PT) suits under-hood automotive sub-modules. The segment LCD drives instrument-cluster readouts, USB diagnostics (USB 2.0 Full-Speed) supports service-tool connectivity, and the ECC Flash preserves data integrity against soft errors caused by automotive electrical transients. 4 DMA channels and CIPs reduce CPU load so the MCU can service CAN-style peripherals and timer-critical tasks simultaneously.
Được đề xuất
Battery-Backed Smart Meter
The PIC24FJ256GL408T-I/PT's dedicated RTCC with backup-domain Vbat pin is essential for smart meters that must keep time through power outages. The 32 KB SRAM stores interval meter data, the 12-bit ADC samples current/voltage channels, and the segment LCD displays consumption and rate information without a separate LCD driver. XLP nanoWatt Sleep modes plus the RTC backup reduce standby current to single-digit microamps, allowing multi-year battery backup. The hardware crypto engine secures tariff/usage data against tampering.
Được đề xuất
Smart Home Touchscreen Controller
With full-speed USB OTG, 256 KB ECC Flash, and a segment LCD controller, the PIC24FJ256GL408T-I/PT can act as a smart-home touchscreen and sensor hub. It interfaces with capacitive touch controllers over SPI, drives a segment LCD for status readouts, and links to a Wi-Fi module via USB or UART. The hardware crypto engine secures over-the-air communications. XLP low-power modes make it suitable for always-on wall controllers drawing minimal standby current.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC24FJ256GL408T-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-I/PT | PIC24FJ256GL408-E/PT | PIC24FJ256GL406T-I/PT | PIC24FJ256GL406-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (12x12 mm) | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same | TQFP-80 (12x12 mm) - same |
| Program Flash | 256 KB ECC | 256 KB ECC | 256 KB ECC | 256 KB ECC | 256 KB ECC |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Max CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| USB | Full-Speed OTG | Full-Speed OTG | Full-Speed OTG | Full-Speed OTG | Full-Speed OTG |
| LCD Controller | Up to 480 segments | Up to 480 segments | Up to 480 segments | Up to 480 segments | Up to 480 segments |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel | Tray |
Bảo phân biệt quan trọng
- On-chip segment LCD controller eliminates external LCD driver (vsPIC24FJ256GB412T-I/BG)
- 256 KB ECC Flash supports safe OTA firmware updates (vsPIC24FJ128GL406-I/PT)
- Industrial temperature grade in TQFP-80 - same die across I/E variants (vsPIC24FJ256GL408-E/PT)
- Full-speed USB 2.0 OTG integrated - no external PHY needed (vsPIC24FJ256GA704-I/PT)
Ghi chú thiết kế
The PIC24FJ256GL408T-I/PT operates from a single 2.0 V to 3.6 V Vdd rail, with a separate Vbat pin (2.0 V to 3.6 V) supplying the RTCC backup domain. Place a 100 nF decoupling capacitor on each Vdd/Vss pair (pins 19/20, 38/39, 57/58, 76/77) and a bulk 4.7 uF capacitor near the supply pin pair closest to pin 19. For Vbat, use a 0.1 uF + 4.7 uF capacitor pair to filter the backup battery. Estimated: with 80-pin TQFP and four Vdd pairs, expect ~100 mA peak current during USB full-speed operation.
Do not skip the MCLR pull-up resistor (typically 10 kohm to Vdd); the MCLR pin (pin 79) is required for proper reset and ICSP programming. Failure to provide a clean MCLR can result in unpredictable resets during USB enumeration. Similarly, ensure the Vbat pin is connected to a valid supply (even if VBAT is not used, tie Vbat to Vdd through 1 kohm to prevent floating-battery-domain lockups per datasheet recommendations).
Route the USB differential pair (D+/D-) as a 90-ohm differential impedance with maximum length matching (delta < 150 mil). Keep the crystal oscillator traces short and symmetric; place the load capacitors within 3 mm of the OSC1/OSC2 pins and shield with a ground guard ring. The 12x12 mm TQFP-80 footprint has a 0.65 mm pitch - allow 4/4 mil signal/space rules in the inner routing layer, and 5/5 mil on the top layer for clean reflow.
The segment LCD segment lines are assigned to specific PORT pins; consult the datasheet's 'LCD Pin Mapping' table. Add ground traces between adjacent segment lines to reduce cross-coupling and improve contrast. For high-density segment LCD panels (>200 segments), allocate a ground fill underneath the LCD flex cable connector on the top layer to provide a stable reference and improve EMI immunity.
The Peripheral Pin Select (PPS) feature lets you remap digital peripherals to most I/O pins - use this to place critical signals (UART, SPI, PWM) on adjacent pins to minimize trace length. However, PPS input remapping incurs a small propagation delay (~2 ns); for high-speed SPI > 20 MHz, route signals to the dedicated (non-PPS) pins where possible to avoid jitter on the SPI clock.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade (I-temp, -40 C to +85 C). Not AEC-Q100 qualified; for AEC-Q100 consider PIC24FJ256GB610-E/PT family members.
