PIC24FJ256GL405-E/PT - 16-Bit MCU, 256KB Flash, USB, LCD | Microchip
N.º de pieza: PIC24FJ256GL405-E/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.8 | $4,80 |
| 10 | $4.32 | $43,20 |
| 100 | $3.84 | $384,00 |
| 500 | $3.45 | $1.725,00 |
| 1.000 | $3.07 | $3.070,00 |
PIC24FJ256GL405-E/PT Descripción general
A PIC24FJ microcontroller belongs to the broader category of 16-bit Flash microcontrollers, which sit architecturally between 8-bit MCUs (such as PIC16/PIC18) and 32-bit Cortex-M devices. The PIC24F line emphasizes low-power operation, rich Core Independent Peripherals (CIPs), and integrated mixed-signal features, making it a natural fit for human-machine interface, IoT sensor, and battery-powered products. The GL4 family specifically targets low-power applications with LCD displays and USB connectivity.
Key features of the PIC24FJ256GL405 include 256KB of ECC Flash with dual-partition support for Over-The-Air (OTA) firmware updates, 32KB SRAM, hardware Real-Time Clock and Calendar (RTCC), multiple 16-bit timers, a 12-bit ADC, configurable logic cells, and CIPs such as PWM, capture, and comparators. The integrated LCD driver supports up to 48 segments, while the integrated full-speed USB 2.0 device/host/OTG controller eliminates the need for an external interface IC.
The device uses a 16-bit modified Harvard architecture with a 24-bit instruction word, providing 16 MIPS performance at 32MHz while maintaining low power consumption (typically in the microamp range in sleep modes). The dual-partition Flash architecture allows safe firmware upgrades in the field, with one partition executing code while the other receives new firmware - critical for OTA-capable IoT nodes.
Typical applications include low-power IoT sensor nodes, USB-connected medical devices, industrial control panels with LCD readouts, smart energy meters, home automation gateways, and portable consumer products. The combination of USB, LCD, and dual-partition OTA Flash makes the part particularly well suited to connected products requiring field-updatable firmware and a local display.
When designing with the PIC24FJ256GL405, pay close attention to the decoupling network (a 100nF ceramic near each VDD/VSS pair plus a bulk 4.7uF) and ensure the 48-pin TQFP layout provides adequate ground copper for thermal performance. The device supports MPLAB X IDE and the MPLAB Harmony v3 ecosystem, including code configurators and peripheral libraries.
This page synthesizes distributor stock data, parametric alternatives, and practical design notes that complement the Microchip datasheet.
Alternativas directas para PIC24FJ256GL405-E/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC24FJ256GL405-E/PT (mismo factor de forma y huella) — difiere en Package, Operating Temperature, ADC, USB, Core Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC24FJ128GL405-I/PT
✅ Sustitución directa✓ En stock
$4.1 / unidad
Ver hoja de datos →PIC24FJ256GL405-I/PT
✅ Sustitución directa✓ En stock
$2.75 / unidad
Ver hoja de datos →PIC24FJ128GL405-E/PT
✅ Sustitución directa✓ En stock
$2.21 / unidad
Ver hoja de datos →PIC24FJ128GL406-I/PT
✅ Sustitución directa✓ En stock
$2.84 / unidad
Ver hoja de datos →PIC24FJ128GL410T-I/PT
✅ Sustitución directa✓ En stock
$4.1 / unidad
Ver hoja de datos →PIC24FJ256GL405-E/PT Valores máximos y características eléctricas
| Core | PIC24F 16-bit |
| Program Memory (Flash) | 256 KB ECC Flash |
| RAM | 32 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Temperatura de funcionamiento | -40 C to +125 C |
| Encapsulado | 48-pin TQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| USB | Full-speed USB 2.0 Device/Host/OTG |
| LCD Driver | Integrated, up to 48 segments |
| ADC | 12-bit |
| Timers | Multiple 16-bit timers |
| RTCC | Yes (Real-Time Clock and Calendar) |
| Core Independent Peripherals (CIPs) | Configurable Logic, PWM, Comparators |
| Flash Architecture | Dual Partition (OTA support) |
| Estado RoHS | Compliant |
| Nivel MSL | 3 |
| Series | PIC24FJ GL4 |
Configuración de pines de PIC24FJ256GL405-E/PT
| Pin 1 | RA0 — General-purpose I/O / analog input |
| Pin 2 | RA1 — General-purpose I/O / analog input |
| Pin 3 | RA2 — General-purpose I/O / analog input |
| Pin 4 | RA3 — General-purpose I/O / analog input |
| Pin 5 | RA4 — General-purpose I/O |
| Pin 6 | RA5 — General-purpose I/O |
| Pin 7 | RA6 — General-purpose I/O |
| Pin 8 | RA7 — General-purpose I/O |
| Pin 9 | RB0 — General-purpose I/O / programming |
| Pin 10 | RB1 — General-purpose I/O |
| Pin 11 | RB2 — General-purpose I/O |
| Pin 12 | RB3 — General-purpose I/O |
| Pin 13 | RB4 — General-purpose I/O |
| Pin 14 | RB5 — General-purpose I/O |
| Pin 15 | RB6 — General-purpose I/O |
| Pin 16 | RB7 — General-purpose I/O |
| Pin 17 | RC0 — General-purpose I/O |
| Pin 18 | RC1 — General-purpose I/O |
| Pin 19 | RC2 — General-purpose I/O |
| Pin 20 | RC3 — General-purpose I/O |
| Pin 21 | RC4 — General-purpose I/O |
| Pin 22 | RC5 — General-purpose I/O |
| Pin 23 | RC6 — General-purpose I/O |
| Pin 24 | RC7 — General-purpose I/O |
| Pin 25 | RD0 — General-purpose I/O |
| Pin 26 | RD1 — General-purpose I/O |
| Pin 27 | RD2 — General-purpose I/O |
| Pin 28 | RD3 — General-purpose I/O |
| Pin 29 | RD4 — General-purpose I/O |
| Pin 30 | RD5 — General-purpose I/O |
| Pin 31 | RD6 — General-purpose I/O |
| Pin 32 | RD7 — General-purpose I/O |
| Pin 33 | VDD — Positive supply voltage (2.0V to 3.6V) |
| Pin 34 | VSS — Ground reference |
| Pin 35 | RE0 — General-purpose I/O |
| Pin 36 | RE1 — General-purpose I/O |
| Pin 37 | RE2 — General-purpose I/O |
| Pin 38 | RE3 — General-purpose I/O |
| Pin 39 | RE4 — General-purpose I/O |
| Pin 40 | RE5 — General-purpose I/O |
| Pin 41 | RE6 — General-purpose I/O |
| Pin 42 | RE7 — General-purpose I/O |
| Pin 43 | RF0 — General-purpose I/O |
| Pin 44 | RF1 — General-purpose I/O |
| Pin 45 | USBID — USB OTG ID pin |
| Pin 46 | D- — USB data minus |
| Pin 47 | D+ — USB data plus |
| Pin 48 | VUSB — USB transceiver supply |
Aplicaciones típicas
PIC24FJ256GL405-E/PT es adecuado para 6 aplicacións: Low-Power IoT Sensor Node with LCD Display, Industrial Control Panel with LCD Readout, USB-Connected Medical Monitoring Device, Smart Energy Meter with Local Display, Home Automation Gateway with USB Connectivity, Portable Consumer Product with USB Charging.
Low-Power IoT Sensor Node with LCD Display
The PIC24FJ256GL405-E/PT is ideal for low-power IoT sensor nodes with local LCD readouts. Its microamp-range sleep current and hardware RTCC allow periodic sensor sampling with sub-milliwatt average power, while the integrated LCD driver eliminates the need for an external display controller. The dual-partition 256KB ECC Flash enables secure Over-The-Air firmware updates without external memory, and the full-speed USB 2.0 controller supports both power and data connectivity from a single port. With 32KB RAM and Core Independent Peripherals, the part handles local signal conditioning autonomously while the CPU sleeps, extending battery life in deployments such as environmental monitors, smart thermostats, and wireless sensor hubs.
Recomendado
Industrial Control Panel with LCD Readout
The PIC24FJ256GL405-E/PT suits industrial control panels that need a local LCD, USB diagnostics port, and reliable firmware. The integrated LCD driver supports up to 48 segments, enough for multi-digit numeric or alphanumeric HMIs in pump controllers, motor starters, and process instruments. The 16 MIPS performance handles real-time PID loops, while 32KB RAM supports protocol stacks (Modbus, CAN). The -40C to +125C extended temperature rating allows operation in cabinets near motors or heaters. USB device mode enables field firmware upgrades and data logging to a host PC, and the dual-partition Flash ensures updates never brick the device in 24/7 industrial installations.
Recomendado
USB-Connected Medical Monitoring Device
The PIC24FJ256GL405-E/PT fits USB-connected medical and health monitoring devices such as glucose meters, pulse oximeters, and portable diagnostic tools. The full-speed USB 2.0 device interface provides both data connectivity and charging from a single port, eliminating proprietary cables. The integrated 12-bit ADC captures sensor signals with sufficient resolution for diagnostic-grade measurements, while the hardware RTCC timestamps readings accurately. ECC Flash improves reliability by detecting and correcting single-bit memory errors, important for safety-critical applications. The 256KB Flash accommodates complex application firmware plus USB class drivers and crypto libraries for data protection, all within a low-power envelope suitable for handheld battery-powered form factors.
Recomendado
Smart Energy Meter with Local Display
The PIC24FJ256GL405-E/PT is well matched to single-phase smart energy meters that require a local segmented LCD, real-time measurement, and secure field-updatable firmware. The integrated LCD driver displays kWh, voltage, and power factor directly on the meter face without an external display IC. The 12-bit ADC paired with Core Independent Peripherals performs continuous power calculations in the background, freeing the CPU for communication and metrology tasks. The dual-partition Flash with ECC enables secure remote firmware updates mandated by utility regulations, while the hardware RTCC supports time-of-use billing and tamper detection timestamps. The extended temperature rating suits outdoor meter enclosures.
Recomendado
Home Automation Gateway with USB Connectivity
The PIC24FJ256GL405-E/PT supports home automation gateways that bridge wireless sensor networks to USB-connected home hubs or PCs. The integrated full-speed USB 2.0 OTG controller allows the gateway to act as either a USB device connected to a home automation hub or a USB host managing peripherals. The 32MHz/16 MIPS performance and 32KB RAM run Zigbee or sub-GHz stacks alongside the application layer. The 256KB Flash stores wireless stack libraries plus application code, and dual-partition OTA support allows field firmware upgrades as new wireless standards emerge. Low-power sleep modes reduce standby power consumption in always-on gateway devices.
Recomendado
Portable Consumer Product with USB Charging
The PIC24FJ256GL405-E/PT is well suited to portable consumer products such as e-cigarettes, fitness trackers, and personal care devices that require USB charging and a small LCD. The full-speed USB controller handles both battery charging (via USB BC 1.2) and data exchange with companion apps. The integrated LCD driver displays status information without extra components, while the 16 MIPS CPU handles user interfaces, sensor fusion, and battery management. The low-power sleep modes with microamp-range current extend battery life between charges, and the 48-pin TQFP package fits within space-constrained consumer product enclosures. ECC Flash improves long-term reliability by catching memory errors in portable products that experience thermal cycling.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC24FJ256GL405-E/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC24FJ128GL405-I/PT | PIC24FJ256GL405-I/PT | PIC24FJ128GL405-E/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same | 48-pin TQFP (7x7 mm) - same |
| Flash Memory | 256 KB ECC | 128 KB ECC | 256 KB ECC | 128 KB ECC |
| RAM | 32 KB | 16 KB | 32 KB | 16 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Operating Temperature | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +125 C (E) |
| USB Controller | Full-speed USB 2.0 OTG | Full-speed USB 2.0 OTG | Full-speed USB 2.0 OTG | Full-speed USB 2.0 OTG |
| LCD Driver | Up to 48 segments | Up to 48 segments | Up to 48 segments | Up to 48 segments |
| Dual-Partition Flash (OTA) | Yes | Yes | Yes | Yes |
Diferenciadores clave
- 256KB ECC Flash with dual-partition OTA support (frente a PIC24FJ128GL405-I/PT)
- Extended -40C to +125C temperature grade (frente a PIC24FJ256GL405-I/PT)
- Integrated USB 2.0 OTG + LCD + RTCC in a single chip (frente a Generic Cortex-M0+ 48-pin TQFP MCUs)
Notas de diseño
The PIC24FJ256GL405-E/PT requires a stable 2.0V to 3.6V supply. Place a 100nF ceramic decoupling capacitor within 2mm of each VDD/VSS pin pair, and add a single 4.7uF bulk capacitor near the device. For USB applications, the VUSB pin requires its own 100nF + 4.7uF network as specified in the Microchip PIC24FJ GL4 family datasheet. Avoid switching supplies for analog-sensitive designs - the 12-bit ADC benefits from a clean LDO (e.g., MCP1700). Estimated: the device typically draws 15-25 mA active at 32MHz and <10 uA in Deep Sleep with RTCC.
The 48-pin TQFP has a 0.5mm lead pitch; use a 4-layer PCB with continuous ground plane beneath the device to minimize EMI and provide thermal spreading. Route the USB D+/D- pair as a 90 ohm differential with matched length, keep the pair length under 50mm, and place the common-mode choke within 5mm of the connector. Avoid routing high-frequency signals under the TQFP body. According to Microchip layout guidelines, place the 12MHz primary oscillator crystal within 5mm of OSC1/OSC2 with a ground guard ring to reduce EMI susceptibility.
When using the dual-partition OTA Flash feature, ensure the bootloader correctly handles partition swaps and that the IVT (Interrupt Vector Table) is mapped to the active partition. According to Microchip application notes, failing to disable interrupts during partition swap can cause firmware corruption. Also, the ECC Flash feature requires that application code never writes 0xFFFFFFFF to Flash - this triggers multi-bit ECC errors. Use the NVMKEY sequence correctly and verify write completion before exiting the ISR.
For USB Full-Speed signaling, the D+/D- traces must be length-matched within 150 mil and routed over a continuous ground plane. According to USB 2.0 spec and Microchip design notes, place a 15 kohm pull-down on D- and a 1.5 kohm pull-up on D+ (connectable via software for device/host mode). For the 12-bit ADC, add a small RC filter (10 ohm + 100nF) at each analog input to suppress digital switching noise. Estimated: typical ADC SNR with proper layout is 70 dB; poor routing can drop this to 55 dB.
Información de cumplimiento
RoHS compliant per Microchip product page. The -E suffix indicates extended temperature grade (-40C to +125C) but is not AEC-Q100 automotive qualified; choose AEC-Q100 variants from the PIC24FJ family for automotive applications.
