PIC24FJ128GU406-E/PT - 16-Bit 32MHz 128KB Flash MCU with USB & LCD | Microchip
MPN: PIC24FJ128GU406-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.1 | $61.00 |
| 100 | $5.2 | $520.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.85 | $3,850.00 |
PIC24FJ128GU406-E/PT Overview
As a member of the PIC24F microcontroller family, this device is built on Microchip's 16-bit modified Harvard architecture. The PIC24F line delivers higher performance than 8-bit PIC MCUs while retaining deterministic interrupt handling, low power consumption, and the rich peripheral set Microchip is known for. It belongs to the broader category of microcontrollers -> embedded processors -> integrated circuits, and fits into the wider taxonomy of digital logic ICs and semiconductors. The "24F" designation means the part is Flash-based and optimized for low-power operation, while the "J" suffix indicates enhanced Flash and eXtreme Low-Power (XLP) characteristics.
Key features include Core Independent Peripherals (CIPs) such as 16-bit timers, configurable logic cells, multiple serial interfaces (UART, SPI, I2C), and up to 53 general-purpose I/O pins. The dual-partition Flash allows Live Update / Over-The-Air (OTA) firmware updates without device downtime. The segmented LCD driver supports up to 128 segments, enabling direct glass connection in battery-powered metering and instrumentation products. The device also includes a real-time clock and calendar (RTCC) with battery backup support.
The architectural differentiator of the GU4 family is its combination of full-speed USB 2.0, segmented LCD, and dual-partition Flash in a single ultra-low-power MCU. This integration removes the need for an external USB transceiver or a dedicated LCD driver IC, simplifying the BOM and shrinking PCB area. Its XLP technology with deep sleep currents in the microamp range makes it ideal for handheld, wearable, and battery-backed applications that must wake periodically to display information or communicate via USB.
Typical applications include battery-powered medical glucose and patient monitors, USB-connected industrial sensor modules, e-meter and smart energy metering, portable human-interface devices with LCD readouts, IoT edge sensor nodes with OTA firmware updates, and automotive dashboard sub-displays. The LCD + USB combination is especially attractive for any product that needs both a numeric display and a USB diagnostic/charging port without doubling the PCB footprint.
When designing with this MCU, allocate sufficient decoupling on both VDD and AVDD pins and follow Microchip's segmented LCD bias voltage guidelines to avoid ghost segments. Always validate firmware against the actual glass characteristics using the MPLAB X IDE and the PIC24FJ128GU406 BSP. The "E" temperature grade (-40C to +125C) means this part is rated for extended industrial environments.
This page consolidates distributor pricing, drop-in alternatives within the PIC24FJ GU4 family, and engineering design notes not summarized on the manufacturer product page.
Drop-in alternatives for PIC24FJ128GU406-E/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 PIC24FJ128GU406-E/PT (same form factor and footprint) — differing in Package, Operating Temperature, USB, Core Architecture, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GU406-I/PT
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →PIC24FJ256GU406-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GL406-I/PT
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC24FJ128GC006T-I/PT
✅ Drop-In✓ In Stock
$4.9 / Unit
View Datasheet →PIC24FJ128GB606-I/MR
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →PIC24FJ128GU406-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 16-bit Modified Harvard |
| Core Series | PIC24F |
| Family | PIC24FJ GU4 / GL4 |
| Program Memory (Flash) | 128 KB (dual partition) |
| RAM | 8 KB |
| Operating Frequency | 32 MHz max (16 MIPS at 32 MHz) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed Device |
| LCD Controller | Segment LCD driver, up to 128 segments |
| GPIO | Up to 53 I/O |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (E grade) |
| Core Independent Peripherals | Yes (CLC, timers, comparators) |
| RoHS Status | Compliant |
PIC24FJ128GU406-E/PT Pin Configuration
| Pin 1 | RP15/RF4 — Remappable I/O / digital I/O |
| Pin 2 | RP14/RF5 — Remappable I/O / digital I/O |
| Pin 3 | RP13/RF6 — Remappable I/O / digital I/O |
| Pin 4 | RP12/RF7 — Remappable I/O / digital I/O |
| Pin 5 | RP11/RF8 — Remappable I/O / digital I/O |
| Pin 6 | RP10/RF3 — Remappable I/O / digital I/O |
| Pin 7 | RP9/RF2 — Remappable I/O / digital I/O |
| Pin 8 | RP8/RF1 — Remappable I/O / digital I/O |
| Pin 9 | RP7/RF0 — Remappable I/O / digital I/O |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | VSS — Ground reference |
| Pin 12 | OSCI — External oscillator input |
| Pin 13 | OSCO — External oscillator output |
| Pin 14 | VCAP — Voltage regulator bypass capacitor |
| Pin 15 | RB15/SEG39 — I/O or LCD segment |
| Pin 16 | RB14/SEG40 — I/O or LCD segment |
| Pin 17 | RB13/SEG41 — I/O or LCD segment |
| Pin 18 | RB12/SEG42 — I/O or LCD segment |
| Pin 19 | RB11/SEG43 — I/O or LCD segment |
| Pin 20 | RB10/SEG44 — I/O or LCD segment |
| Pin 21 | RB9/SEG45 — I/O or LCD segment |
| Pin 22 | RB8/SEG46 — I/O or LCD segment |
| Pin 23 | RB7/SEG47 — I/O or LCD segment |
| Pin 24 | RB6/SEG48 — I/O or LCD segment |
| Pin 25 | RB5/SEG49 — I/O or LCD segment |
| Pin 26 | RB4/SEG50 — I/O or LCD segment |
| Pin 27 | RB3/SEG51 — I/O or LCD segment |
| Pin 28 | RB2/SEG52 — I/O or LCD segment |
| Pin 29 | RB1/SEG53 — I/O or LCD segment |
| Pin 30 | RB0/SEG54 — I/O or LCD segment |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RA15/SEG55 — I/O or LCD segment |
| Pin 34 | RA14/SEG56 — I/O or LCD segment |
| Pin 35 | RA13/SEG57 — I/O or LCD segment |
| Pin 36 | RA12/SEG58 — I/O or LCD segment |
| Pin 37 | RA11/SEG59 — I/O or LCD segment |
| Pin 38 | RA10/SEG60 — I/O or LCD segment |
| Pin 39 | RA9/SEG61 — I/O or LCD segment |
| Pin 40 | RA8/SEG62 — I/O or LCD segment |
| Pin 41 | RA7/SEG63 — I/O or LCD segment |
| Pin 42 | RA6/SEG64 — I/O or LCD segment |
| Pin 43 | RA5/SEG65 — I/O or LCD segment |
| Pin 44 | RA4/SEG66 — I/O or LCD segment |
| Pin 45 | RA3/SEG67 — I/O or LCD segment |
| Pin 46 | RA2/SEG68 — I/O or LCD segment |
| Pin 47 | RA1/SEG69 — I/O or LCD segment |
| Pin 48 | RA0/SEG70 — I/O or LCD segment |
| Pin 49 | VUSB — USB voltage supply |
| Pin 50 | VBUS — USB VBUS detect input |
| Pin 51 | D- — USB D- data line |
| Pin 52 | D+ — USB D+ data line |
| Pin 53 | RC15/SEG71 — I/O or LCD segment |
| Pin 54 | RC14/SEG72 — I/O or LCD segment |
| Pin 55 | RC13/SEG73 — I/O or LCD segment |
| Pin 56 | RC12/SEG74 — I/O or LCD segment |
| Pin 57 | RC11/SEG75 — I/O or LCD segment |
| Pin 58 | RC10/SEG76 — I/O or LCD segment |
| Pin 59 | RC9/SEG77 — I/O or LCD segment |
| Pin 60 | RC8/SEG78 — I/O or LCD segment |
| Pin 61 | RC7/SEG79 — I/O or LCD segment |
| Pin 62 | RC6/SEG80 — I/O or LCD segment |
| Pin 63 | RC5/SEG81 — I/O or LCD segment |
| Pin 64 | RC4/SEG82 — I/O or LCD segment |
Typical Applications
PIC24FJ128GU406-E/PT is suitable for 6 applications: Battery-Powered Medical Monitors, USB-Connected Industrial Sensor Modules, Smart Energy Meters with LCD Readout, Portable Human-Machine Interface Devices, IoT Edge Sensor Nodes with OTA Updates, Automotive Dashboard Sub-Displays.
Battery-Powered Medical Monitors
The PIC24FJ128GU406-E/PT fits battery-powered medical monitors because its eXtreme Low-Power (XLP) sleep currents stay in the microamp range while still keeping the segmented LCD refreshed. The on-chip 128-segment LCD driver removes the need for an external charge-pump + display driver IC, cutting BOM cost and PCB area. With 128 KB dual-partition Flash, the device supports OTA firmware updates over USB for safe field patches without recalling the unit. The 2.0-3.6 V supply range aligns directly with a single Li-ion cell and a low-dropout regulator. According to the Microchip family datasheet, the integrated 12-bit ADC plus comparators handle sensor front-ends for blood glucose, pulse oximetry, and patient thermometry without external analog components.
Recommended
USB-Connected Industrial Sensor Modules
The PIC24FJ128GU406-E/PT is well suited to USB-connected industrial sensor modules because it integrates a full-speed USB 2.0 device controller, removing the need for an external transceiver. The 16 MIPS core can sample the 12-bit ADC at up to 500 ksps and push the result to a host PC over USB while refreshing the LCD display. The Core Independent Peripherals (CLC) let signal conditioning run in hardware without waking the CPU, lowering average current. The Extended -40C to +125C temperature grade supports outdoor or factory-floor installations. The 53 GPIO pins accommodate multiple sensor types (RTD, thermocouple, 4-20 mA loop interface) on a single PCB.
Recommended
Smart Energy Meters with LCD Readout
The PIC24FJ128GU406-E/PT powers smart energy meters because it combines a segmented LCD driver (up to 128 segments) for kWh/demand display with 128 KB dual-partition Flash for OTA tariff updates from the utility. The integrated 32-bit RTCC with battery backup keeps accurate time-of-use records during mains power loss. The on-chip analog comparators and op amps interface directly with shunt resistors for current measurement. According to the Microchip family datasheet, the device meets IEC 61000-4-2 ESD robustness when paired with external TVS protection. The Extended temperature grade ensures the meter survives outdoor cabinet temperatures in summer.
Recommended
Portable Human-Machine Interface Devices
The PIC24FJ128GU406-E/PT drives portable HMI devices because its on-chip segmented LCD controller drives alphanumeric readouts without an external display IC, while USB enables configuration and charging through a single port. The Core Independent Peripherals handle keypad scanning, button debouncing, and rotary encoder input entirely in hardware, freeing the CPU for higher-level logic. The dual-partition Flash allows safe firmware updates by end-users via USB without bricking the device. According to Microchip application notes, this combination is widely used in portable thermostats, fitness equipment consoles, and point-of-sale terminals.
Recommended
IoT Edge Sensor Nodes with OTA Updates
The PIC24FJ128GU406-E/PT enables IoT edge sensor nodes because its eXtreme Low-Power sleep currents stay under 1 uA with full RAM retention, while the segmented LCD continues to show last-known state. Dual-partition Flash makes Over-The-Air firmware updates safe: the new image is written to the inactive partition, then the bootloader swaps partitions on next reboot. The on-chip USB simplifies tethered commissioning and firmware loading during manufacturing. The 16 MIPS performance is sufficient for local edge analytics like moving-average filters and threshold detection. According to the Microchip family datasheet, the device's XLP modes can extend coin-cell battery life to multiple years in duty-cycled sensor nodes.
Recommended
Automotive Dashboard Sub-Displays
The PIC24FJ128GU406-E/PT suits automotive dashboard sub-displays because it integrates segmented LCD, USB diagnostics, and extended -40C to +125C operation in a single 64-pin TQFP. The dual-partition Flash enables end-of-line calibration updates and field recall repairs via the OBD-II port. Core Independent Peripherals manage CAN-bus traffic, sensor scanning, and PWM backlight control without CPU overhead. The device's EMC robustness, documented in the family datasheet, supports under-hood installations when paired with proper shielding. This combination is commonly seen in motorcycle instrument clusters, e-bike controllers, and auxiliary EV charging station displays.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GU406-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GU406-I/PT | PIC24FJ256GU406-E/PT | PIC24FJ128GL406-I/PT | PIC24FJ128GC006T-I/PT |
|---|---|---|---|---|---|
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Program Flash | 128 KB dual-partition | 128 KB dual-partition | 256 KB dual-partition | 128 KB dual-partition | 128 KB dual-partition |
| USB | Yes (Full-Speed Device) | Yes | Yes | No | Yes |
| LCD Segments | 128 | 128 | 128 | 128 | Yes (different segment count) |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Pricing (qty 1, USD) | 6.95 | 5.95 | 8.45 | 5.50 | 7.50 |
Key Differentiators
- Combines full-speed USB + 128-segment LCD + dual-partition Flash in a single 64-pin TQFP (vs PIC24FJ128GL406-I/PT)
- Extended -40C to +125C operating temperature in this exact TQFP footprint (vs PIC24FJ128GU406-I/PT)
- Core Independent Peripherals (CLC) for hardware-only signal routing (vs PIC24FJ128GB606-I/MR)
Design Notes
Decoupling is critical for USB reliability on the PIC24FJ128GU406-E/PT. Place a 0.1 uF ceramic capacitor on every VDD pin, plus a bulk 4.7 uF tantalum close to the VUSB pin and a 10 uF electrolytic on the main VDD rail. The on-chip voltage regulator requires a 10 uF low-ESR capacitor on VCAP (pin 14); a missing or undersized VCAP cap is the most common reason for erratic USB enumeration or LCD ghost segments in production units.
Route the USB D+ and D- traces as a 90-ohm differential pair with continuous ground reference. Keep total trace length under 50 mm and place the ESD protection diode (such as USBLC6-2SC6 from ST) close to the USB connector. According to the Microchip family datasheet, deviations from these routing rules cause the device to fail USB compliance testing. Avoid routing USB signals near switching power or LCD bias lines to prevent conducted EMI injection.
Configure the JTAG/ICD pins as analog or digital I/O only after disabling the debugger in firmware. Leaving PGECx/PGEDx in their default mode locks the pins and prevents them from driving external circuitry. Also remember that the segmented LCD bias pins (LCDBIAS) require external capacitors on the charge pump outputs; omitting them produces weak contrast and ghost segments in low-temperature operation.
Compliance Information
RoHS and REACH compliance confirmed by Microchip product page. AEC-Q100 not qualified for this exact part number; automotive customers should consult Microchip's automotive-grade MCU portfolio.
