PIC24FJ512GU405-I/PT - 16-bit MCU 512KB Flash USB/LCD 48-TQFP | Microchip
MPN: PIC24FJ512GU405-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.92 | $59.20 |
| 100 | $5.3 | $530.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.32 | $4,320.00 |
PIC24FJ512GU405-I/PT Overview
A 16-bit microcontroller (MCU) is a microprocessor core that processes data in 16-bit-wide chunks, balancing 8-bit simplicity with 32-bit performance. It belongs to the taxonomy: microcontroller -> embedded MCU -> 16-bit MCU -> RISC MCU -> semiconductor. PIC24F devices specifically target ultra-low-power (eXtreme Low Power) applications, making them well-suited to battery-powered and energy-harvesting designs.
Key features of the PIC24FJ512GU405 include dual-partition Flash supporting real-time Over-The-Air (OTA) firmware updates and EEPROM emulation without external components, eliminating in-field firmware-update downtime. Integrated peripherals include a 12-bit ADC, multiple UART/SPI/I2C, Real-Time Clock, comparators, PWM, and a segmented LCD driver. The full-speed USB 2.0 device controller enables tethered or self-powered connected-product designs without an external transceiver.
The device uses a Harvard RISC architecture with modified Harvard memory mapping, achieving deterministic 32 MHz operation with deep-sleep currents in the microamp range. Core Independent Peripherals handle tasks like signal conditioning, waveform generation, and event-based sequencing without CPU wake-ups, dramatically reducing average power.
Typical applications include IoT sensor nodes with LCD displays, USB-connected industrial data loggers, secure OTA-updatable consumer appliances, low-power medical monitoring, and remote-control human-machine interfaces requiring segmented LCD readouts. The dual-partition OTA capability is critical for products that must update firmware without service interruption.
When designing with this part, allocate sufficient decoupling (100 nF + bulk) near each VDD/VSS pair, keep the 48-pin TQFP PCB layout symmetrical, and reserve a programming/debug footprint for the 4-wire ICSP interface. Pay attention to the USB D+/D- trace impedance (90 ohm differential) for FCC compliance.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and PCB design notes that go beyond what the manufacturer datasheet or distributor catalog pages typically surface in one place.
Drop-in alternatives for PIC24FJ512GU405-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 PIC24FJ512GU405-I/PT (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GU405-I/PT
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →PIC24FJ128GU405-I/PT
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →PIC24FJ512GL405-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ256GL405-I/PT
✅ Drop-In✓ In Stock
$2.75 / Unit
View Datasheet →PIC24FJ512GA705-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GA705-I/PT
✅ Drop-In✓ In Stock
$2.83 / Unit
View Datasheet →PIC24FJ512GU405-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit RISC (modified Harvard) |
| Instruction Set Width | 16-bit |
| Maximum MIPS | 16 MIPS |
| System Clock Speed | 32 MHz |
| Program Flash Memory | 512 KB (ECC, dual partition) |
| SRAM | 32 KB |
| USB Interface | USB 2.0 Full-Speed Device |
| LCD Controller | Integrated segmented LCD driver |
| ADC | 12-bit, multi-channel |
| Operating Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 48-pin TQFP (7x7 mm), 0.5 mm pitch |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 3 (per JEDEC J-STD-020) |
| Lead-Free | Yes |
PIC24FJ512GU405-I/PT Pin Configuration
| Pin 1 | RB15 — General I/O / analog capable |
| Pin 2 | RB14 — General I/O |
| Pin 3 | RB13 — General I/O / analog capable |
| Pin 4 | RB12 — General I/O |
| Pin 5 | AVDD — Analog supply |
| Pin 6 | AVSS — Analog ground |
| Pin 7 | RA0 — General I/O |
| Pin 8 | RA1 — General I/O |
| Pin 9 | RA2 — General I/O |
| Pin 10 | RA3 — General I/O |
| Pin 11 | RA4 — General I/O |
| Pin 12 | RA5 — General I/O |
| Pin 13 | VDD — Digital supply |
| Pin 14 | VSS — Digital ground |
| Pin 15 | RA6 — General I/O |
| Pin 16 | RA7 — General I/O |
| Pin 17 | RB0 — General I/O / PGED3 |
| Pin 18 | RB1 — General I/O / PGEC3 |
| Pin 19 | RB2 — General I/O |
| Pin 20 | RB3 — General I/O |
| Pin 21 | RB4 — General I/O |
| Pin 22 | RB5 — General I/O |
| Pin 23 | RB6 — General I/O |
| Pin 24 | RB7 — General I/O |
| Pin 25 | RB8 — General I/O |
| Pin 26 | RB9 — General I/O |
| Pin 27 | RB10 — General I/O |
| Pin 28 | RB11 — General I/O |
| Pin 29 | VDD — Digital supply |
| Pin 30 | VSS — Digital ground |
| Pin 31 | D- — USB D- (if USB used) |
| Pin 32 | D+ — USB D+ (if USB used) |
| Pin 33 | RC0 — General I/O |
| Pin 34 | RC1 — General I/O |
| Pin 35 | RC2 — General I/O |
| Pin 36 | RC3 — General I/O |
| Pin 37 | RC4 — General I/O |
| Pin 38 | RC5 — General I/O |
| Pin 39 | RC6 — General I/O |
| Pin 40 | RC7 — General I/O |
| Pin 41 | RC8 — General I/O |
| Pin 42 | RC9 — General I/O |
| Pin 43 | RC10 — General I/O |
| Pin 44 | RC11 — General I/O |
| Pin 45 | RC12 — General I/O |
| Pin 46 | RC13 — General I/O |
| Pin 47 | RC14 — General I/O |
| Pin 48 | RC15 — General I/O |
Typical Applications
PIC24FJ512GU405-I/PT is suitable for 7 applications: IoT Sensor Node with LCD Display, USB-Connected Industrial Data Logger, Secure OTA-Updatable Consumer Appliance, Portable Medical Monitoring Device, Remote Control Human-Machine Interface, USB Dongle for Wireless Sensor Configuration, Battery-Powered Data Acquisition Module.
IoT Sensor Node with LCD Display
The PIC24FJ512GU405-I/PT is an ideal MCU for battery-powered IoT sensor nodes requiring local segmented-LCD readouts. Its integrated LCD controller drives up to 48 segments without external driver ICs, while the 512 KB dual-partition Flash supports Over-The-Air firmware updates essential for long-life sensor deployments. Core Independent Peripherals (CIPs) sample sensors, manage wake events, and update displays without CPU intervention, reducing active-mode duty cycle below 1 percent in many scenarios. The 32 KB SRAM buffers sensor data between transmissions, and the 2.0V-3.6V VDD range supports direct coin-cell or 2xAA battery operation.
Recommended
USB-Connected Industrial Data Logger
For USB-tethered industrial data loggers, the PIC24FJ512GU405-I/PT integrates a full-speed USB 2.0 device controller that eliminates the need for an external PHY, simplifying both BOM and FCC certification. The 512 KB Flash stores months of buffered sensor logs even during USB disconnect, while the 12-bit ADC captures analog process signals with 1 LSB typical DNL. Real-Time Clock and Calendar (RTCC) with on-chip calibration timestamps each sample, and the industrial -40C to +85C operating range handles factory-floor environments without thermal management.
Recommended
Secure OTA-Updatable Consumer Appliance
Consumer appliances such as smart thermostats, coffee machines, and HVAC controllers benefit from the PIC24FJ512GU405-I/PT dual-partition Flash, which enables secure Over-The-Air firmware updates without bricking risk. One partition runs production firmware while the other receives updates; on next reboot, the device verifies the new image and switches over atomically. The 16 MIPS performance handles HMI responsiveness, the LCD controller drives the front-panel display, and USB allows factory provisioning and field diagnostics without opening the enclosure.
Recommended
Portable Medical Monitoring Device
Portable medical devices such as pulse oximeters, glucose meters, and sleep-monitors demand low power, accurate ADC, and reliable data storage. The PIC24FJ512GU405-I/PT delivers sub-microamp deep-sleep current extending battery life, a 12-bit ADC for sensor signal conditioning, and 512 KB Flash for patient log retention. The integrated LCD controller drives the user-facing display directly, while USB enables clinic-side data offload. Industrial temperature grade supports clinical and home environments. Compliance with IEC 60601 requires additional isolation circuitry external to the MCU.
Recommended
Remote Control Human-Machine Interface
Industrial HMIs, access-control keypads, and building-automation panels use the PIC24FJ512GU405-I/PT to drive segmented LCDs, scan keypads, and communicate via USB or UART. The CIPs handle debouncing, key scanning, and LCD refresh autonomously, freeing the CPU for application logic. The 32 KB SRAM supports display buffer and protocol stack simultaneously, while the dual-partition Flash allows secure field updates across thousands of deployed units. The 48-TQFP package balances I/O count with PCB area for compact panel designs.
Recommended
USB Dongle for Wireless Sensor Configuration
USB dongles that configure, calibrate, or upgrade wireless sensor networks benefit from the PIC24FJ512GU405-I/PT combination of USB device controller, large Flash for protocol stacks, and CIPs for asynchronous serial handling. The MCU acts as a USB CDC/ECM bridge to UART-linked sensor nodes, the dual-partition Flash hosts bootloader and application, and the LCD controller is available for status indication in field-service tools. Drop-in compatibility with PIC24FJ256GU405-I/PT allows easy memory scaling per project.
Recommended
Battery-Powered Data Acquisition Module
Standalone data-acquisition modules in remote installations rely on the PIC24FJ512GU405-I/PT ultra-low-power deep-sleep modes, 12-bit ADC, and 512 KB Flash to log sensor data over multi-year deployments. The dual-partition Flash supports field firmware upgrades without physical access, the RTCC timestamps samples with second accuracy, and the integrated LCD controller optionally displays local readings. The 2.0V minimum VDD allows operation from a single lithium primary cell with a step-up regulator, or directly from 2xAA cells across their discharge curve.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ512GU405-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GU405-I/PT | PIC24FJ128GU405-I/PT | PIC24FJ512GL405-I/PT | PIC24FJ512GA705-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7) | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same |
| Flash Memory | 512 KB | 256 KB | 128 KB | 512 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Core / MIPS | PIC24F / 16 MIPS | PIC24F / 16 MIPS | PIC24F / 16 MIPS | PIC24F / 16 MIPS | PIC24F / 16 MIPS |
| USB Controller | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | Full-Speed USB 2.0 Device | None (GA7 sub-family) |
| LCD Controller | Integrated segmented LCD | Integrated segmented LCD | Integrated segmented LCD | Integrated segmented LCD | None (GA7 sub-family) |
| Dual Partition OTA Flash | Yes | Yes | Yes | Yes | Yes |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Dual-partition Flash enables fail-safe OTA firmware updates (vs PIC24FJ512GA705-I/PT)
- Integrated full-speed USB 2.0 controller on-chip (vs PIC24FJ512GA705-I/PT)
- Largest on-chip Flash in 48-TQFP PIC24F family (vs PIC24FJ128GU405-I/PT)
- Integrated segmented LCD controller (vs PIC24FJ512GA705-I/PT)
Design Notes
Decoupling: place a 100 nF ceramic capacitor as close as possible to each VDD/VSS pair (the 48-TQFP has multiple pairs). Add a single 4.7 uF to 10 uF bulk capacitor near the MCU supply pin. The PIC24FJ512GU405 has low quiescent current in deep sleep; estimated Iq in deep-sleep is in the microamp range (consult datasheet for exact value). USB supply requires 4.7 uF + 100 nF near the VUSB pin if USB is enabled.
USB D+/D- traces must be routed as a 90 ohm differential pair with continuous ground reference on an adjacent layer. Keep total trace length under 50 mm and match lengths within 2 mm. Place the USB connector near the board edge. The 48-pin TQFP (7x7 mm) PCB layout should reserve a programming header footprint for ICSP (PGC/PGD on RB0/RB1) to allow in-circuit firmware updates during development and field service.
Do not exceed 3.6 V on any VDD pin - the PIC24FJ512GU405 is a 3.3 V part. If the application includes a 5 V USB VBUS rail, insert a regulator or load switch before connecting to VDD. Configure unused pins as digital outputs (not inputs) to minimize current leakage. When using the dual-partition OTA feature, ensure both partitions are erased before initial programming or the bootloader will fail verification.
At 32 MHz active operation the PIC24FJ512GU405-I/PT draws under 30 mA typical core current; the 48-TQFP package thermal resistance theta_JA of approximately 50 C/W allows operation to +85C ambient without active cooling. Estimated: at 25 mA and 3.3 V core, power dissipation is ~0.08 W yielding ~4 C junction rise above ambient, well within safe limits. The package is not designed for high-power dissipation and external thermal management is unnecessary in typical use.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C; not AEC-Q100 qualified for automotive - use PIC24FJ512GU405-E/PT for extended grade variants. Halogen-free status not explicitly stated in web data.
