PIC24FJ512GU408-I/PT - 16-bit 32MHz 512KB Flash MCU | Microchip
MPN: PIC24FJ512GU408-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.32 | $63.20 |
| 100 | $5.55 | $555.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.42 | $4,420.00 |
PIC24FJ512GU408-I/PT Overview
A 16-bit microcontroller is a single-chip computer that processes data 16 bits at a time, sitting between 8-bit MCUs (low cost, simple control) and 32-bit MCUs (high performance, complex OS). 16-bit PIC microcontrollers target mid-range embedded designs that need more computational headroom, larger memory maps, and richer peripherals than 8-bit parts, without the power and code-size overhead of Cortex-M class devices. The PIC24F 'eXtreme Low-Power' subfamily adds nanoWatt XLP sleep modes (as low as 20 nA in deep sleep) that approach the standby current of 8-bit PIC MCUs while preserving 16-bit DSP-class throughput.
Key differentiating features of the PIC24FJ512GU408 include 512 KB dual-partition Flash (live field firmware updates with rollback), a 32 KB general-purpose SRAM, hardware crypto accelerators, an 8-channel hardware DMA, a 16-bit Sigma-Delta ADC path, up to 69 general-purpose I/O, a segmented LCD driver with charge pump supporting up to 480 segments, a USB 2.0 full-speed device/host/OTG controller, and a Real-Time Clock Calendar (RTCC) with battery backup. Five timers/capture/compare and multiple UART/SPI/I2C interfaces round out the peripheral set. The dual-partition Flash architecture is the headline feature for OTA designs: a new image can be written to the inactive partition while the active one continues running the application, then swapped on next reset with instant rollback capability.
Typical applications include battery-powered IoT sensor nodes with USB firmware update ports, medical wearables requiring segmented LCD readouts, industrial HMI panels with USB diagnostics, and remote sensor telemetry where OTA firmware updates eliminate physical service calls. The integrated LCD controller, hardware USB, and eXtreme Low-Power sleep currents together make this part uniquely suited for sealed, battery-driven human-interface products.
When designing with the PIC24FJ512GU408, verify VDD vs. VBAT domain routing carefully and place the 80-pin TQFP on a 4-layer PCB with a continuous ground plane under the exposed pad to meet thermal and EMI requirements. Use MPLAB X IDE with the XC16 compiler and MCC code configurator to take advantage of the integrated CIPs and shorten development time. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ512GU408-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC24FJ512GU408-I/PT (same form factor and footprint) — differing in LCD Controller, USB, ADC, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GU408-I/PT
✅ Drop-In✓ In Stock
$3.92 / Unit
View Datasheet →PIC24FJ128GU408-I/PT
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC24FJ512GL408-I/PT
✅ Drop-In✓ In Stock
$6.3 / Unit
View Datasheet →PIC24FJ512GU410-I/PT
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →PIC24FJ512GU406-I/PT
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →PIC24FJ256GU406-I/PT
✅ Drop-In✓ In Stock
$2.69 / Unit
View Datasheet →PIC24FJ128GU406-I/PT
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →PIC24FJ512GU408-I/PT Maximum Ratings & Electrical Characteristics
| Family | PIC24F 'GU4/GL4' eXtreme Low-Power |
| Core | PIC24F 16-bit RISC |
| Maximum CPU Frequency | 32 MHz (16 MIPS) |
| Program Flash Memory | 512 KB (dual-partition) |
| RAM | 32 KB |
| EEPROM Emulation | Supported (via Flash) |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| LCD Controller | Integrated, up to 480 segments |
| Operating Temperature | -40C to +85C (Industrial, 'I') |
| I/O Pins | Up to 69 |
| Timers | 5 (16-bit Timer/Capture/Compare) |
| DMA Channels | 8 |
| Communication | UART, SPI, I2C, USB |
| Package | 80-pin TQFP (12x12 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Part Status | In Production |
PIC24FJ512GU408-I/PT 80-pin tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for PIC24FJ512GU408-I/PT (80-pin tqfp (12x12 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC24FJ512GU408-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ512GU408-I/PT is suitable for 7 applications: IoT Sensor Node with USB Firmware Update, Battery-Powered Medical Wearable Device, Industrial HMI Panel with USB Diagnostics, Smart Meter with Segmented LCD Display, USB-Connected Data Logger, Automotive Interior Sensor Module, Wireless Sensor Hub with USB Debug Port.
IoT Sensor Node with USB Firmware Update
The PIC24FJ512GU408-I/PT fits IoT sensor nodes because its dual-partition 512 KB Flash supports real-time Over-The-Air firmware updates with rollback, and its integrated USB 2.0 full-speed controller removes the need for an external bridge chip. With eXtreme Low-Power nanoWatt XLP sleep modes drawing only ~20 nA in deep sleep and 8 mA typical active at 32 MHz, battery-powered designs can achieve multi-year coin-cell operation. The 32 KB SRAM is sufficient for sensor buffers, USB stack, and OTA staging. The device is placed as the main MCU with USB D+/D- lines routed to a Micro-USB connector; a 1.5 kohm pull-up on D+ selects full-speed USB. Unlike Cortex-M parts, the 16-bit PIC delivers lower active current and integrated USB without an external PHY.
Recommended
Battery-Powered Medical Wearable Device
The PIC24FJ512GU408-I/PT suits battery-powered medical wearables because its eXtreme Low-Power XLP sleep currents (~20 nA) extend coin-cell runtime to multiple years while the integrated segmented LCD controller drives the device's display directly without an external driver IC. The 512 KB dual-partition Flash supports secure OTA firmware updates required for medical device field maintenance, and the integrated USB allows bedside charging and data transfer. The wide -40C to +85C industrial temperature range supports body-worn and cold-chain applications. The device is placed between the battery, segmented LCD glass, and analog sensor front end; a single-cell Li-ion or coin-cell battery powers VDD with the RTCC running on VBAT. Compared with Cortex-M0+ alternatives it offers lower sleep current and integrated LCD controller.
Recommended
Industrial HMI Panel with USB Diagnostics
The PIC24FJ512GU408-I/PT fits industrial HMI panels because its integrated segmented LCD controller (up to 480 segments) eliminates external display driver ICs and the integrated USB 2.0 controller enables field-service diagnostics via a laptop connection. The 32 MHz / 16 MIPS core drives real-time user-interface updates while the 512 KB Flash stores multilingual UI assets and OTA update images. Hardware crypto accelerators provide secure firmware image verification, important for industrial customers that lock down field firmware. The Industrial -40C to +85C temperature grade meets factory-floor environments. The device sits between the LCD glass, USB service port, and panel keypad; 5 timer/capture modules drive PWM backlight control and encoder inputs.
Recommended
Smart Meter with Segmented LCD Display
The PIC24FJ512GU408-I/PT is well-suited to smart electricity, gas, and water meters because its segmented LCD controller with charge pump can drive the meter's glass even when the battery voltage sags to 2.0V, ensuring continuous readout down to end-of-life. The 512 KB dual-partition Flash enables secure OTA firmware updates from utility back-office systems, and the hardware crypto accelerators verify firmware image signatures before swap. The VBAT domain keeps the RTCC running during main-battery replacement, preserving time-of-use tariff data. The -40C to +85C industrial temperature grade meets outdoor metering enclosures. The device is placed between the metering AFE, segmented LCD glass, and optional RF or PLC communication module.
Recommended
USB-Connected Data Logger
The PIC24FJ512GU408-I/PT fits USB-connected data loggers because the integrated USB 2.0 full-speed controller (device mode) allows direct connection to a host PC for data download, eliminating external bridge chips. The 32 KB SRAM accommodates deep sample FIFOs and the 512 KB dual-partition Flash stores weeks of compressed sensor data while also supporting OTA firmware updates. The DMA controller (8 channels) moves samples between ADC and memory without CPU intervention, leaving the CPU free for USB transfers. The integrated RTCC timestamps every sample. The MCU is placed between the analog sensor front end, USB connector, and battery backup; compared with discrete MCU + FTDI bridge designs, this single-chip solution reduces BOM cost and PCB area by ~30%.
Recommended
Automotive Interior Sensor Module
Although the PIC24FJ512GU408-I/PT is the industrial ('-I') grade, designers use this part family for non-safety automotive interior applications such as cabin climate sensors, USB charging ports, and interior lighting controllers. The integrated USB controller and segmented LCD are useful for interior HMI, and the 512 KB dual-partition Flash supports OTA firmware updates in connected-car telematics modules. The -40C to +85C temperature range spans passenger-compartment conditions. For under-hood or safety-critical applications, designers should instead select the AEC-Q100 qualified PIC24F automotive family. The MCU is placed between the cabin sensor array, USB port, and CAN/LIN transceiver.
Recommended
Wireless Sensor Hub with USB Debug Port
The PIC24FJ512GU408-I/PT fits wireless sensor hubs because it can host an SPI-connected radio module (LoRa, Sub-GHz, or BLE-to-UART bridge) while exposing a USB debug port for factory provisioning and field firmware updates. The 8-channel DMA feeds radio RX data into memory, the 32 KB RAM buffers multi-packet transactions, and the 512 KB dual-partition Flash stores application plus radio stack plus OTA staging. The 32 MHz core is sufficient for medium-throughput sensor aggregation. The MCU is placed between the radio module, USB connector, and sensor I2C/SPI peripherals. Unlike higher-MIPS Cortex-M parts, the PIC24FJ512GU408 delivers lower average power for duty-cycled sensor hubs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ512GU408-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GU408-I/PT | PIC24FJ128GU408-I/PT | PIC24FJ512GL408-I/PT | PIC24FJ512GU410-I/PT | PIC24FJ256GU406-I/PT |
|---|---|---|---|---|---|---|
| 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 | TQFP-80 (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Flash | 512 KB | 256 KB | 128 KB | 512 KB | 512 KB | 256 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Maximum CPU Frequency | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| USB Controller | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG |
| LCD Controller | Yes, up to 480 segments | Yes, up to 480 segments | Yes, up to 480 segments | Yes, reduced segment count | Yes, extended segment count | Yes, reduced segment count |
| Hardware Crypto | Yes (AES/SHA) | Yes (AES/SHA) | Yes (AES/SHA) | No | Yes (AES/SHA) | No |
| Dual-Partition Flash (OTA) | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
Key Differentiators
- Dual-partition 512 KB Flash for live OTA firmware updates (vs PIC24FJ256GU408-I/PT)
- Integrated segmented LCD controller up to 480 segments (vs PIC24FJ128GB110-I/PT)
- eXtreme Low-Power nanoWatt XLP technology with ~20 nA deep-sleep (vs PIC24FJ512GB610-I/PT)
- Hardware crypto accelerators (AES/SHA) for secure OTA (vs PIC24FJ512GL408-I/PT)
Design Notes
The PIC24FJ512GU408-I/PT supports nanoWatt XLP sleep modes with deep-sleep currents as low as ~20 nA according to the 'GU4/GL4' family datasheet. To achieve this, configure unused peripherals to their lowest-power states, disable the ADC, and gate the system clock using the OSCCON register's SLPEN bit. Place a 1uF decoupling capacitor adjacent to every VDD pin and a 10uF bulk capacitor near the IC. For battery-backed designs, route VBAT to a separate coin-cell domain so the RTCC continues during main-battery swap.
Route the 80-pin TQFP layout on a 4-layer PCB with a continuous ground plane under the device. USB D+ and D+ traces must be routed as a 90-ohm differential pair with length matching within 2 mm; place the 27 ohm series termination resistors near the MCU pins. Keep the segmented LCD segment traces short and routed away from noisy power lines, as the LCD driver is sensitive to injected noise. Place a ferrite bead between VDD and AVDD to isolate analog supply noise.
When implementing Over-The-Air firmware updates using the dual-partition Flash, ensure the application does not write to NV-memory pages that overlap with the bootloader or partition-table region. The FSEC and FBOOT configuration registers must be set to enable partition swapping; reference Microchip application note AN3755 for the exact CFGWORD sequence. The bootloader should occupy a fixed 16 KB region at the high end of Flash so the application has access to the full remaining area in either partition.
The USB module on the PIC24FJ512GU408 requires a 1.5 kohm pull-up resistor on D+ to signal full-speed mode. Add 27 ohm source-series termination on D+ and D- near the MCU to suppress reflections. Use a shielded USB connector with the shield tied to chassis ground through a ferrite bead. For battery-powered applications, disconnect the USB pull-up when VBUS is absent to avoid leakage; the PIC24F USB module supports this via the USBCTRL.USBEN bit tied to an interrupt on VBUS detect.
Estimated: At 32 MHz active operation with USB enabled and all peripherals active, the device draws ~15 mA from a 3.3V supply, so a typical 3.6V Li-ion battery at 1000 mAh will sustain ~60 hours of continuous active operation. For battery-powered designs this confirms that duty-cycling with sleep modes is essential. Common pitfalls include: leaving unused GPIO in analog mode (causes leakage), not enabling the RTCC VBAT switch, omitting the required 10uF bulk capacitor near VBAT, and forgetting to configure the PPS module to map peripherals to the correct physical pins.
Compliance Information
Industrial ('-I/PT') grade is not AEC-Q100 qualified; select automotive-grade PIC24F AEC-Q100 parts for safety-critical automotive applications. RoHS and REACH compliant per Microchip product page. Halogen-free per Microchip green-compliance documentation.