PIC24FJ128GU406T-I/PT - 128KB Flash USB LCD MCU | Microchip
MPN: PIC24FJ128GU406T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
PIC24FJ128GU406T-I/PT Overview
A 16-bit microcontroller (MCU) is a programmable integrated circuit that uses a 16-bit data path, registers, and arithmetic logic unit to execute instructions. PIC24F MCUs sit in the broader hierarchy: 16-bit MCU -> microcontroller -> embedded processor -> semiconductor. They are widely used where 8-bit MCUs lack throughput and 32-bit MCUs waste power, balancing code density, deterministic interrupt latency, and ultra-low sleep current for battery-powered designs.
Key features include a built-in segmented LCD driver supporting animation, multiple Core Independent Peripherals (CIPs) such as Configurable Logic Cells (CLC), Multiple Output Compare, and a 12-bit ADC. The chip supports sleep currents down to a few hundred nanoamps, making it suitable for always-on battery products. Real-time clock (RTCC) with calendar and tamper detect is integrated, plus 5V-tolerant I/O for mixed-voltage systems.
The architecture combines a modified Harvard CPU with single-cycle 16-bit multiply and divide, hardware DMA, and an instruction cache for the flash array. USB 2.0 full-speed is provided with an internal transceiver and on-chip pull-up resistors, removing the need for an external PHY. ECC Flash supports single-bit error correction for industrial reliability requirements.
Typical applications include medical devices (glucometers, infusion pumps), home automation panels, industrial control with LCD HMI, USB wearables, and any battery-powered IoT product needing on-glass segment displays. The segmented LCD controller eliminates an external LCD driver chip in many designs.
When designing, evaluate the LCD segment count vs. the 64-pin pinout - if more than the supported commons/segments are required, consider migrating to the 80-pin or 100-pin GU4/GL4 variants. For applications without LCD, the GL4 family offers pin-compatible non-LCD parts to reduce cost.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from Microchip's own family, and practical design notes for the GU4/GL4 platform not aggregated on any single distributor page.
Drop-in alternatives for PIC24FJ128GU406T-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 PIC24FJ128GU406T-I/PT (same form factor and footprint) — differing in Package, USB, ADC, Operating Temperature, Program Flash.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GU406-I/PT
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →PIC24FJ128GL406-I/PT
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC24FJ128GU405-I/PT
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →PIC24FJ128GL410T-I/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC24FJ128GB406-I/MR
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →PIC24FJ128GB606-I/MR
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →PIC24FJ128GU406T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| Family | PIC24FJ 'GU4/GL4' |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 128 KB ECC Flash |
| RAM | 32 KB |
| USB | USB 2.0 Full-Speed (on-chip transceiver) |
| LCD Controller | Segmented LCD with animation support |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Sleep Current | Few hundred nA (family typ.) |
| Core Independent Peripherals (CIPs) | CLC, PWM, IC, OC, ADC, etc. |
| Operating Temperature Grade | Industrial (-I) |
| Packaging Code | T = Tape & Reel |
| RoHS Status | Compliant |
PIC24FJ128GU406T-I/PT 64-pin tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for PIC24FJ128GU406T-I/PT (64-pin tqfp (10x10 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 PIC24FJ128GU406T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ128GU406T-I/PT is suitable for 6 applications: Battery-Powered Medical Devices, USB HMI Industrial Panels, Smart Home Thermostats, Portable USB Wearables, Electronic Shelf Labels (ESL), IoT Sensor Hubs with LCD.
Battery-Powered Medical Devices
The PIC24FJ128GU406T-I/PT's 128KB ECC Flash and 32KB RAM, combined with sub-microamp sleep current, makes it ideal for battery-powered medical devices such as glucometers, infusion pumps, and pulse oximeters. The integrated 12-bit ADC and Core Independent Peripherals handle sensor sampling while the CPU sleeps, extending battery life. USB connectivity enables tethered data transfer to a PC for trend analysis. According to the Microchip family datasheet, RTCC with calendar supports medication reminder logging. Industrial -40C to +85C temperature range meets home healthcare environments.
Recommended
USB HMI Industrial Panels
For industrial USB HMI panels, the PIC24FJ128GU406T-I/PT delivers USB 2.0 full-speed connectivity with on-chip transceiver - eliminating external PHY cost. The segmented LCD controller with animation support drives multi-segment displays directly, removing external LCD driver chips. 128KB ECC Flash stores graphics fonts and HMI state machines; 32KB RAM holds redraw buffers. CIPs (CLC, multi-output compare) handle keypad scanning and LED PWM without CPU load. Operates from -40C to +85C for factory floor environments.
Recommended
Smart Home Thermostats
The PIC24FJ128GU406T-I/PT suits smart home thermostats that need LCD readout plus USB service port plus coin-cell backup. The integrated segmented LCD controller with animation supports icons and running text without an external driver. Sub-microamp sleep current allows the thermostat to run for years on backup battery during power loss. USB full-speed enables firmware upgrade and HVAC technician diagnostics. CIP-based timers handle sensor polling without CPU intervention. 64-pin TQFP package fits 50mm x 50mm wall-mount designs.
Recommended
Portable USB Wearables
The PIC24FJ128GU406T-I/PT is well-suited for portable USB wearables that recharge and sync over USB while displaying status on a small segmented LCD. Full-speed USB with on-chip transceiver provides tethered charging mode plus data sync without an external PHY. Sleep current in the few-hundred-nA range plus RTCC with calendar support allows multi-week standby on a small Li-ion cell. The 12-bit ADC (per family datasheet) reads battery voltage and skin temperature for power management. The 64-pin TQFP fits sub-30mm square wearables.
Recommended
Electronic Shelf Labels (ESL)
The PIC24FJ128GU406T-I/PT powers USB-configured electronic shelf labels that display pricing and inventory data on segmented LCDs. The 16 MIPS performance drives segmented LCD updates with animation while maintaining USB service port connectivity for in-store configuration. Sleep current down to a few hundred nA enables multi-year battery life on the ESL coin cell. ECC Flash ensures price data integrity across thermal cycles in retail environments. 64-pin TQFP package suits the thin ESL form factor.
Recommended
IoT Sensor Hubs with LCD
The PIC24FJ128GU406T-I/PT acts as a USB-attached IoT sensor hub that aggregates sensor data over USB and displays local readings on a segmented LCD. Full-speed USB with internal pull-up resistors simplifies hub integration with a host PC or embedded gateway. The 32KB RAM buffer holds pre-transmit sensor samples. CIPs like CLC and multi-output compare handle parallel sensor sampling and fan-out PWM for indicator LEDs without CPU intervention. ECC Flash protects against bit corruption in electrically noisy industrial IoT environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GU406T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GU406-I/PT | PIC24FJ128GL406-I/PT | PIC24FJ128GU405-I/PT | PIC24FJ128GL410T-I/PT | PIC24FJ128GB406-I/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | QFN-64 (MR) - drop-in but QFN body |
| Flash Memory | 128 KB ECC | 128 KB ECC | 128 KB ECC | 128 KB ECC | 128 KB ECC | 128 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 8 KB |
| USB | Yes (Full-Speed, on-chip PHY) | Yes (Full-Speed) | No | Yes (Full-Speed) | No | No |
| LCD Controller | Yes (segmented + animation) | Yes (segmented + animation) | Yes (segmented + animation) | Yes | Yes | Yes |
| Maximum CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated USB 2.0 full-speed with on-chip transceiver (vs PIC24FJ128GL406-I/PT)
- Segmented LCD controller with animation support (vs PIC24FJ128GB406-I/MR)
- ECC Flash with single-bit error correction (vs PIC24FJ128GA410-I/PT)
Design Notes
Estimated: At 32MHz active, VDD=3.3V, typical core current is ~15 mA; in sleep with RTCC, total current drops to a few hundred nA per the family datasheet. Add a 100nF decoupling capacitor on each VDD pin and a 10uF bulk capacitor near the package. For battery-powered designs, switch off unused peripherals via the PMD (Peripheral Module Disable) registers to minimize active current. Use the on-chip LDO regulator output (if used) to power only the core, not the I/O bank, when entering deep sleep.
Route the USB DP/DM differential pair as a 90-ohm differential impedance with no stubs; keep pair length matching within 150 mil. Place the 27 ohm series resistors near the MCU side if the device is USB-OTG capable. The segmented LCD segment pins should be routed away from switching power supplies and clocks to minimize injected noise on the LCD glass. Add a guard ring around the AVSS/AVDD pins and keep analog traces short.
Do not leave unused I/O pins floating - configure them as outputs driving low or as inputs with the internal weak pull-up enabled. The USB module requires the internal 3.3V USB transceiver rail to be stable before VBUS is applied; add a 1ms startup delay in firmware. ECC Flash error correction is automatic, but uncorrectable errors trigger a TRAPR flag - service it in firmware to maintain data integrity. The LCD charge pump requires external caps on the charge pump pins when using internal bias generation.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified (industrial grade only). For automotive applications, look for VAO-suffixed part numbers.
