PIC24FJ512GU406-I/MR - 512KB Flash 16-bit MCU USB LCD | Microchip
MPN: PIC24FJ512GU406-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.82 | $68.20 |
| 100 | $6.05 | $605.00 |
| 500 | $5.42 | $2,710.00 |
| 1,000 | $4.88 | $4,880.00 |
PIC24FJ512GU406-I/MR Overview
A 16-bit microcontroller (MCU) is an integrated circuit containing a CPU, memory, and programmable peripherals on a single die. The 16-bit data path allows single-cycle arithmetic on integer values up to 65,535, balancing performance and code density between 8-bit (e.g., PIC16, AVR) and 32-bit (e.g., Cortex-M) architectures. The PIC24F family is Microchip's low-power 16-bit line, positioned above PIC16/PIC18 8-bit parts and below dsPIC/PIC32 32-bit offerings in the company's portfolio hierarchy.
Key features include 16 MIPS performance at 32 MHz, multiple Core Independent Peripherals (CIPs) that operate without CPU intervention, a 12-bit ADC, multiple UART/SPI/I2C interfaces, and a segmented LCD driver supporting up to 512 segments. The 512KB ECC Flash and 32KB SRAM provide ample headroom for USB stacks, LCD UI assets, and OTA update buffers. Wide operating voltage (2.0V to 3.6V) and low-power sleep modes with RTC retention make this MCU well-suited to battery-powered applications.
Architecturally, the PIC24FJ GU4/GL4 family combines a modified Harvard architecture with a 16-bit instruction word and 24-bit instruction bus. The dual-partition Flash divides memory into two independent 256KB regions, allowing one partition to execute application code while the other receives a firmware update, then swap roles atomically for true live update capability. Core Independent Peripherals (CIPs) like CLC, MCCP, and DMA operate autonomously, freeing the CPU from routine tasks.
Typical applications include USB Human Interface Devices (HIDs) with integrated LCD displays, industrial control panels with segmented LCD readouts, medical devices requiring secure OTA firmware updates, IoT edge nodes with sensor readouts, and consumer appliances with graphical segment displays. The combination of USB, LCD, and OTA in a single part eliminates 15-200 external components typically required by separate parts.
When designing with this device, allocate one Flash partition for the bootloader and one for application code from project start - retrofitting OTA support after firmware development is significantly harder. Ensure the 64-pin QFN ground pad is soldered with adequate thermal vias; pin pitch is 0.5 mm, requiring precise stencil design for reliable assembly.
This page synthesizes distributor pricing, drop-in alternative PIC24F family members, parametric comparisons, and practical design notes not consolidated on the manufacturer datasheet or individual distributor pages.
Drop-in alternatives for PIC24FJ512GU406-I/MR — 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 PIC24FJ512GU406-I/MR (same form factor and footprint) — differing in USB, ADC, Core, LCD Controller, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ512GL406-I/MR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC24FJ256GU406-I/MR
✅ Drop-In✓ In Stock
$5.82 / Unit
View Datasheet →PIC24FJ512GU406-I/MR Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit |
| Program Memory | 512 KB Flash (dual partition) |
| RAM | 32 KB |
| CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed |
| LCD Driver | Segmented LCD, up to 512 segments |
| ADC | 12-bit |
| Package | 64-QFN (MR) 9x9 mm |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
| Pin Count | 64 |
| Flash ECC | Yes (Flash Error Correction Code) |
| OTA Update Support | Yes (dual partition) |
PIC24FJ512GU406-I/MR Pin Configuration
| Pin 1 | RA0 — I/O port A bit 0 / analog input |
| Pin 2 | RA1 — I/O port A bit 1 / analog input |
| Pin 3 | RA2 — I/O port A bit 2 / analog input |
| Pin 4 | RA3 — I/O port A bit 3 / analog input |
| Pin 5 | RA4 — I/O port A bit 4 |
| Pin 6 | RA5 — I/O port A bit 5 |
| Pin 7 | RA6 — I/O port A bit 6 / OSC1 |
| Pin 8 | RA7 — I/O port A bit 7 / OSC2 |
| Pin 9 | VDD — Positive supply voltage |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0 — I/O port B bit 0 / programming |
| Pin 12 | RB1 — I/O port B bit 1 |
| Pin 13 | RB2 — I/O port B bit 2 |
| Pin 14 | RB3 — I/O port B bit 3 |
| Pin 15 | RB4 — I/O port B bit 4 |
| Pin 16 | RB5 — I/O port B bit 5 |
| Pin 17 | RB6 — I/O port B bit 6 / ICSPCLK |
| Pin 18 | RB7 — I/O port B bit 7 / ICSPDAT |
| Pin 19 | RC0 — I/O port C bit 0 |
| Pin 20 | RC1 — I/O port C bit 1 |
| Pin 21 | RC2 — I/O port C bit 2 |
| Pin 22 | RC3 — I/O port C bit 3 |
| Pin 23 | RC4 — I/O port C bit 4 |
| Pin 24 | RC5 — I/O port C bit 5 |
| Pin 25 | RC6 — I/O port C bit 6 |
| Pin 26 | RC7 — I/O port C bit 7 |
| Pin 27 | RD0 — I/O port D bit 0 |
| Pin 28 | RD1 — I/O port D bit 1 |
| Pin 29 | RD2 — I/O port D bit 2 |
| Pin 30 | RD3 — I/O port D bit 3 |
| Pin 31 | RD4 — I/O port D bit 4 |
| Pin 32 | RD5 — I/O port D bit 5 |
| Pin 33 | RD6 — I/O port D bit 6 |
| Pin 34 | RD7 — I/O port D bit 7 |
| Pin 35 | RE0 — I/O port E bit 0 |
| Pin 36 | RE1 — I/O port E bit 1 |
| Pin 37 | RE2 — I/O port E bit 2 |
| Pin 38 | RE3 — I/O port E bit 3 |
| Pin 39 | RE4 — I/O port E bit 4 |
| Pin 40 | RE5 — I/O port E bit 5 |
| Pin 41 | RE6 — I/O port E bit 6 |
| Pin 42 | RE7 — I/O port E bit 7 |
| Pin 43 | RF0 — I/O port F bit 0 |
| Pin 44 | RF1 — I/O port F bit 1 |
| Pin 45 | RF2 — I/O port F bit 2 |
| Pin 46 | RF3 — I/O port F bit 3 |
| Pin 47 | RF4 — I/O port F bit 4 |
| Pin 48 | RF5 — I/O port F bit 5 |
| Pin 49 | VUSB — USB voltage supply |
| Pin 50 | D+ — USB D+ data line |
| Pin 51 | D- — USB D- data line |
| Pin 52 | RG0 — I/O port G bit 0 |
| Pin 53 | RG1 — I/O port G bit 1 |
| Pin 54 | RG2 — I/O port G bit 2 |
| Pin 55 | RG3 — I/O port G bit 3 |
| Pin 56 | RG6 — I/O port G bit 6 |
| Pin 57 | RG7 — I/O port G bit 7 |
| Pin 58 | RG8 — I/O port G bit 8 |
| Pin 59 | RG9 — I/O port G bit 9 |
| Pin 60 | VDD — Positive supply voltage |
| Pin 61 | VSS — Ground reference |
| Pin 62 | MCLR — Master clear reset |
| Pin 63 | SOSCI — Secondary oscillator input |
| Pin 64 | SOSCO — Secondary oscillator output |
Typical Applications
PIC24FJ512GU406-I/MR is suitable for 6 applications: USB Human Interface Device with LCD, Industrial Control Panel with Segmented LCD, Medical Device with Secure OTA Updates, IoT Sensor Edge Node, Consumer Appliance with Graphical Display, Automotive Dashboard Sub-Display.
USB Human Interface Device with LCD
The PIC24FJ512GU406-I/MR suits USB HID devices with integrated LCD readouts because of its on-chip USB 2.0 Full-Speed controller (eliminating external PHY) and segmented LCD driver supporting up to 512 segments. The 512 KB Flash provides ample room for USB HID stacks, while 32 KB RAM buffers HID reports and LCD frame updates. At 16 MIPS the CPU handles HID polling, LCD refresh, and application logic simultaneously. Per Microchip datasheet DS30010203C, the part is qualified for USB compliance testing. Typical use: programmable control panels, custom keyboards with LCD status displays, USB measurement instruments.
Recommended
Industrial Control Panel with Segmented LCD
The PIC24FJ512GU406-I/MR fits industrial control panels because of its 512-segment LCD driver, dual-partition Flash for OTA-capable field updates, and industrial -40C to +85C operating temperature. The 32 KB RAM buffers sensor data and LCD refresh, while the 12-bit ADC reads process variables directly without external ADC ICs. The 64-QFN package withstands industrial vibration environments when properly soldered with thermal vias. Per Microchip datasheet DS30010203C, the part supports industrial EMC standards. Typical use: process controllers, HVAC thermostats, weighing scales, sensor readouts.
Recommended
Medical Device with Secure OTA Updates
The PIC24FJ512GU406-I/MR enables medical devices with secure firmware updates through dual-partition Flash supporting atomic OTA swaps and 512 KB Flash with ECC for code integrity. The wide 2.0V-3.6V operating voltage supports battery-powered designs, while low-power sleep modes with RTC retention extend battery life. The 12-bit ADC provides sufficient resolution for vital-sign analog front-ends. Per Microchip, the CIP peripherals operate autonomously, reducing CPU wake events and saving 60-80% active power. Typical use: blood pressure monitors, glucose meters, wearable health patches.
Recommended
IoT Sensor Edge Node
The PIC24FJ512GU406-I/MR fits IoT sensor edge nodes because of its 512 KB Flash (ample for MQTT/CoAP stacks), 32 KB RAM for sensor buffering, and segmented LCD for local status display. The dual-partition Flash enables Over-The-Air firmware updates without device downtime, critical for deployed sensors. USB Full-Speed provides wired commissioning, while Core Independent Peripherals (CIPs) wake the MCU on sensor events without CPU intervention, reducing active current by 60-80%. Typical use: smart thermostats, environmental monitors, asset trackers with LCD status.
Recommended
Consumer Appliance with Graphical Display
The PIC24FJ512GU406-I/MR suits consumer appliances with graphical segmented LCD displays because of its 512-segment LCD driver, USB for firmware service updates, and 512 KB Flash for rich UI assets and product feature code. The 32 KB RAM supports smooth LCD refresh and UI state management. Wide 2.0V-3.6V operating voltage accommodates battery-backed and line-powered designs. Per Microchip datasheet DS30010203C, the LCD driver supports up to 8 common electrodes and 64 segments per common. Typical use: coffee machines, washing machines, microwave ovens with LCD.
Recommended
Automotive Dashboard Sub-Display
The PIC24FJ512GU406-I/MR can be deployed in automotive dashboard sub-displays where its 512-segment LCD driver, USB diagnostics interface, and 512 KB Flash with OTA support enable firmware service updates at dealerships. The industrial -40C to +85C temperature range handles cabin environments, though AEC-Q100 automotive qualification requires the PIC24FJ512GU406-I/MR automotive-grade equivalent per Microchip's product roadmap. Typical use: instrument cluster sub-modules, climate control panels, rear-seat entertainment controllers. For full automotive qualification, dedicated AEC-Q100 parts from the same family are recommended.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ512GU406-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ512GL406-I/MR | PIC24FJ256GU406-I/MR |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (MR) 9x9 mm | 64-QFN (MR) 9x9 mm - same | 64-QFN (MR) 9x9 mm - same |
| Program Memory | 512 KB Flash | 512 KB Flash | 256 KB Flash (-50%) |
| RAM | 32 KB | 32 KB | 32 KB |
| CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Operating Voltage | 2.0 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| LCD Driver | Up to 512 segments | Up to 512 segments | Up to 512 segments |
| ADC | 12-bit | 12-bit | 12-bit |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Dual-partition Flash for live OTA updates (vs PIC24FJ512GL406-I/MR)
- Higher operating voltage range (vs PIC24FJ512GL406-I/MR)
- Largest Flash in same 64-QFN package (vs PIC24FJ256GU406-I/MR)
Design Notes
The 64-QFN (MR) package has a 0.5 mm pitch with an exposed thermal pad that must be soldered with thermal vias to a ground plane. Per IPC-7530 guidelines for QFN packages, a minimum via array of 4x4 thermal vias (0.3 mm diameter, 0.6 mm pitch) is recommended. Insufficient soldering of the exposed pad leads to thermal failure under sustained load; the device derates significantly above 60C ambient if the pad is not properly bonded.
Place 100 nF decoupling capacitors on each VDD/VSS pair within 2 mm of the pin pairs. A bulk 10 uF ceramic or tantalum capacitor should be placed near the main VDD pin. The VUSB pin requires its own 100 nF decoupling capacitor and a 1.5 kOhm pull-up resistor (D+ to VUSB) for USB Full-Speed operation. Per Microchip datasheet DS30010203C, inadequate USB bypass causes intermittent USB enumeration failures.
Dual-partition Flash OTA updates require a bootloader partition of at least 64 KB; reserving only the default 256 KB + 256 KB split can cause the bootloader to overflow if the application grows. Plan partition boundaries at firmware architecture stage, not at production. The MCLR reset pin requires a 10 kOhm pull-up to VDD; floating MCLR causes unpredictable reset behavior and watchdog-triggered resets during USB suspend events.
Route USB D+ and D- as a 90-ohm differential pair with matched lengths (within 150 mil) and keep the pair away from switching signals and clock traces. Per USB 2.0 Full-Speed layout guidelines, place the common-mode choke (if used) within 5 mm of the USB connector. The 24 MHz primary oscillator traces should be short and guarded by noise with ground pour. LCD segment traces can be routed on internal layers but require careful guarding to prevent crosstalk.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. AEC-Q100 not qualified - dedicated automotive parts required for vehicle applications.