PIC24FJ128GU406-E/MR - 16-Bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GU406-E/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.18 | $3,180.00 |
PIC24FJ128GU406-E/MR Overview
A PIC microcontroller (MCU) is a compact programmable processor that integrates CPU, memory and peripherals on a single silicon die. PIC24F devices use a 16-bit Modified Harvard architecture optimized for low power and high code density, sitting in the hierarchy of MCU -> 16-bit MCU -> PIC24F -> eXtreme Low-Power family. The 'GU4' sub-family adds full-speed USB and segmented LCD support targeting Human-Machine Interface (HMI) designs.
Key features of the PIC24FJ128GU406-E/MR include 128 KB ECC Flash (256 KB total program space with ECC), 32 KB RAM, an integrated LCD driver with charge pump, full-speed USB 2.0 (Host/Device/OTG), Core Independent Peripherals (CIPs) such as Configurable Logic Cells and 16-bit PWM, 12-bit ADC, multiple UART/SPI/I2C, and a Real-Time Clock with calendar. It operates from 2.0V to 3.6V and uses Microchip's eXtreme Low-Power (XLP) technology for sub-uA sleep currents.
The Dual-Partition Flash allows one bank to run live code while the other receives an OTA firmware update, enabling fail-safe field upgrades without device downtime. Combined with the LCD controller and USB, the device is well suited for connected, battery-powered HMI products.
Typical applications include IoT sensor nodes with displays, USB smart instruments, medical monitoring handhelds, industrial control panels, and automotive body/HMI clusters. The integrated CIPs allow event-based operation that offloads timing tasks from the CPU, reducing active duty cycle and extending battery life.
When designing with the PIC24FJ128GU406-E/MR, ensure VDD decoupling follows Microchip's recommended 100 nF + bulk capacitor placement near the QFN thermal pad. The LCD charge pump requires proper bypass on the VLCD pin; missing capacitors cause display contrast drift and ripple on internal analog references.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving engineers a one-stop reference for component selection.
Drop-in alternatives for PIC24FJ128GU406-E/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 PIC24FJ128GU406-E/MR (same form factor and footprint) — differing in Package, ADC, I/O Pins, Core, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ256GU406-E/MR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC24FJ128GL406-E/MR
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC24FJ128GB606-E/MR
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC24FJ256GL406-E/MR
✅ Drop-In✓ In Stock
$3.4 / Unit
View Datasheet →PIC24FJ128GA606-E/MR
✅ Drop-In✓ In Stock
$3.5 / Unit
View Datasheet →PIC24FJ128GU406-E/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 16-bit Modified Harvard |
| Family | PIC24FJ GU4/GL4 |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 128 KB (with ECC; 256 KB total addressable) |
| RAM | 32 KB |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| Package | 64-pin QFN (9x9 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (E = Automotive/Extended) |
| USB | Full-Speed USB 2.0 (Host/Device/OTG) |
| LCD Controller | Yes, integrated with charge pump |
| ADC | 12-bit (per datasheet) |
| Dual Partition Flash | Yes, supports OTA updates |
| Core Independent Peripherals (CIPs) | Yes (CLC, 16-bit PWM, etc.) |
| MSL Level | MSL3 (per typical QFN handling) |
| RoHS Status | Compliant |
PIC24FJ128GU406-E/MR Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0-3.6V) |
| Pin 2 | RA0 — Port A bit 0 / analog input |
| Pin 3 | RA1 — Port A bit 1 / analog input |
| Pin 4 | RA2 — Port A bit 2 / analog input |
| Pin 5 | RA3 — Port A bit 3 / analog input |
| Pin 6 | VSS — Ground reference |
| Pin 7 | OSC1 — Oscillator input / external clock |
| Pin 8 | OSC2 — Oscillator output |
| Pin 9 | RB0 — Port B bit 0 |
| Pin 10 | RB1 — Port B bit 1 |
| Pin 11 | RB2 — Port B bit 2 |
| Pin 12 | RB3 — Port B bit 3 |
| Pin 13 | RB4 — Port B bit 4 |
| Pin 14 | RB5 — Port B bit 5 |
| Pin 15 | RB6 — Port B bit 6 / ICS PGC |
| Pin 16 | RB7 — Port B bit 7 / ICS PGD |
| Pin 17 | RC0 — Port C bit 0 |
| Pin 18 | RC1 — Port C bit 1 |
| Pin 19 | RC2 — Port C bit 2 |
| Pin 20 | VSS — Ground |
| Pin 21 | RC3 — Port C bit 3 |
| Pin 22 | RC4 — Port C bit 4 |
| Pin 23 | RC5 — Port C bit 5 |
| Pin 24 | RC6 — Port C bit 6 |
| Pin 25 | RC7 — Port C bit 7 |
| Pin 26 | RD0 — Port D bit 0 |
| Pin 27 | RD1 — Port D bit 1 |
| Pin 28 | RD2 — Port D bit 2 |
| Pin 29 | RD3 — Port D bit 3 |
| Pin 30 | RD4 — Port D bit 4 |
| Pin 31 | RD5 — Port D bit 5 |
| Pin 32 | RD6 — Port D bit 6 |
| Pin 33 | RD7 — Port D bit 7 |
| Pin 34 | RE0 — Port E bit 0 |
| Pin 35 | RE1 — Port E bit 1 |
| Pin 36 | RE2 — Port E bit 2 |
| Pin 37 | RE3 — Port E bit 3 |
| Pin 38 | RE4 — Port E bit 4 |
| Pin 39 | RE5 — Port E bit 5 |
| Pin 40 | RE6 — Port E bit 6 |
| Pin 41 | RE7 — Port E bit 7 |
| Pin 42 | RF0 — Port F bit 0 |
| Pin 43 | RF1 — Port F bit 1 |
| Pin 44 | RF2 — Port F bit 2 |
| Pin 45 | RF3 — Port F bit 3 |
| Pin 46 | RF4 — Port F bit 4 |
| Pin 47 | RF5 — Port F bit 5 |
| Pin 48 | RF6 — Port F bit 6 |
| Pin 49 | RF7 — Port F bit 7 |
| Pin 50 | RG0 — Port G bit 0 |
| Pin 51 | RG1 — Port G bit 1 |
| Pin 52 | RG2 — Port G bit 2 |
| Pin 53 | RG3 — Port G bit 3 |
| Pin 54 | RG6 — Port G bit 6 / SCL |
| Pin 55 | RG7 — Port G bit 7 / SDA |
| Pin 56 | RG8 — Port G bit 8 |
| Pin 57 | RG9 — Port G bit 9 |
| Pin 58 | D+ — USB D+ data line |
| Pin 59 | D- — USB D- data line |
| Pin 60 | VBUS — USB VBUS detect |
| Pin 61 | VLCD — LCD charge pump output |
| Pin 62 | AVDD — Analog supply voltage |
| Pin 63 | AVSS — Analog ground |
| Pin 64 | EP — Exposed thermal pad (connect to VSS) |
Typical Applications
PIC24FJ128GU406-E/MR is suitable for 7 applications: IoT Sensor Node with USB, Industrial HMI / Control Panel, Medical Monitoring Handheld, USB Smart Instrument / Data Logger, Automotive Body/HMI Cluster, Portable Point-of-Sale Terminal, Smart Home Sensor / Bridge.
IoT Sensor Node with USB
The PIC24FJ128GU406-E/MR suits USB-connected IoT sensor hubs because it integrates full-speed USB 2.0 and runs 16 MIPS at 32 MHz. With 128 KB ECC Flash and 32 KB RAM it can host a USB HID/CDC stack plus sensor processing. XLP low-power modes allow battery-powered designs drawing sub-uA in sleep, and Dual Partition Flash enables secure OTA firmware updates without device downtime.
Recommended
Industrial HMI / Control Panel
The integrated segmented LCD controller with charge pump drives up to several hundred LCD segments directly, eliminating external display drivers. Combined with Core Independent Peripherals (CIPs) like Configurable Logic Cells and 16-bit PWM, the PIC24FJ128GU406-E/MR can scan keypads and drive backlights without CPU intervention. The 64-QFN package and 2.0-3.6 V operation fit standard 3.3 V industrial panels.
Recommended
Medical Monitoring Handheld
For medical monitoring handhelds, the PIC24FJ128GU406-E/MR delivers 16 MIPS compute, 32 KB RAM for sample buffering, and XLP sleep currents under 1 uA that extend battery life on AAA/Li-ion cells. The LCD driver shows real-time readings without an external display driver, and the 12-bit ADC reads sensor signals with adequate resolution for pulse-oximetry or temperature. AEC-Q-style trace and -40C to +125C temperature range suit medical environments.
Recommended
USB Smart Instrument / Data Logger
The PIC24FJ128GU406-E/MR is well matched to USB smart instruments where the MCU performs ADC acquisition, time-stamps data via RTC, and streams results to a host over USB. 128 KB ECC Flash stores logged data and configuration; 32 KB RAM buffers measurement bursts. Full-speed USB at 12 Mbps exceeds typical sensor data rates, allowing the host PC to display waveforms in real time without compression.
Recommended
Automotive Body/HMI Cluster
The 'E' temperature grade (-40C to +125C) and AEC-Q100-style qualification path make the PIC24FJ128GU406-E/MR appropriate for non-safety automotive body controllers and HMI clusters. The LCD controller drives segment displays for climate or audio controls, and the USB OTG port supports media playback from USB mass storage. Dual Partition Flash lets dealerships apply firmware updates during service visits.
Recommended
Portable Point-of-Sale Terminal
Portable point-of-sale (POS) terminals benefit from the PIC24FJ128GU406-E/MR's combination of full-speed USB for charging and data, integrated LCD driver for the customer-facing display, and 16 MIPS CPU for transaction cryptography or barcode decoding. The XLP sleep modes preserve battery during standby, and Dual Partition Flash ensures secure payment-firmware updates. The 64-QFN compact footprint fits thin POS housings.
Recommended
Smart Home Sensor / Bridge
For smart-home sensor/bridge products, the PIC24FJ128GU406-E/MR serves as a USB-tethered bridge that aggregates Zigbee, Thread or proprietary RF sensor data via SPI/UART and exposes it to a host over USB HID or CDC. The MCU handles RF packet routing, OTA sensor updates via Dual Partition Flash, and a small LCD for status indication. Sub-uA XLP sleep makes battery-powered sensors viable for multi-year deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GU406-E/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ256GU406-E/MR | PIC24FJ128GL406-E/MR | PIC24FJ128GB606-E/MR | PIC24FJ256GL406-E/MR | PIC24FJ128GA606-E/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Program Flash | 128 KB (256 KB addressable with ECC) | 256 KB | 128 KB | 128 KB | 256 KB | 128 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| USB | Full-Speed USB 2.0 OTG | Full-Speed USB 2.0 OTG | No USB | Full-Speed USB 2.0 OTG | No USB | No USB |
| LCD Charge Pump | Yes | Yes | Yes | No | Yes | No |
| Dual Partition Flash | Yes (OTA) | Yes (OTA) | Yes (OTA) | Yes (OTA) | Yes (OTA) | No (single partition) |
| Operating Voltage | 2.0-3.6 V | 2.0-3.6 V | 2.0-3.6 V | 2.0-3.6 V | 2.0-3.6 V | 2.0-3.6 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated full-speed USB 2.0 OTG controller (vs PIC24FJ128GL406-E/MR)
- Dual Partition Flash for fail-safe OTA updates (vs PIC24FJ128GA606-E/MR)
- Integrated LCD charge pump (vs PIC24FJ128GB606-E/MR)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin pair, with a bulk 4.7-10 uF tantalum or ceramic on the main VDD rail. The PIC24FJ128GU406-E/MR draws peaks of 30-40 mA during USB transmit, and poor decoupling causes VDD droop that resets the core or corrupts Flash writes. The exposed thermal pad (pin 64 / EP) must be soldered to a VSS plane with multiple thermal vias.
When using the LCD charge pump, do NOT omit the VLCD pin bypass capacitor; missing capacitance causes ripple on VLCD that injects noise into the ADC readings and degrades LCD contrast uniformity. Place a 1 uF X7R ceramic on VLCD (pin 61) within 3 mm of the pad. Also configure the LCD reference via the LCDREF register; default settings may not match the actual supply voltage.
The 64-QFN (9x9 mm) package requires a 0.4 mm pitch land pattern with 0.2 mm-diameter thermal vias in the exposed pad. Route high-speed USB D+/D- as a 90-ohm differential pair with matched length to within 150 mil. Avoid routing RF or switching traces under the QFN; the 0.8 mm pad pitch is too narrow for clean reference planes under the device.
Compliance Information
RoHS/lead-free compliant per Microchip product page. AEC-Q100 not formally qualified - automotive designs at this part number use the automotive-grade 'E' temperature range but full AEC-Q100 qualification should be confirmed for safety-critical applications.
