PIC24FJ32GU202-I/MV - 32KB Flash USB MCU | Microchip 28-UQFN
MPN: PIC24FJ32GU202-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.32 | $33.20 |
| 100 | $2.88 | $288.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.27 | $2,270.00 |
| 3,000 | $2.06 | $6,180.00 |
PIC24FJ32GU202-I/MV Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, data memory, and peripherals on a single die. Within the broader semiconductor taxonomy, the PIC24FJ32GU202 sits in the 16-bit MCU category, between 8-bit PIC10/12/16 families and 32-bit ARM Cortex-M parts. The PIC24FJ sub-family specifically targets low-power connected applications: 'GP' variants omit USB for general-purpose use, while 'GU' variants add USB 2.0 with on-chip transceiver and charge-pump-less operation directly from VBUS.
Key differentiating features include hardware ECC on Flash for enhanced reliability, deep sleep currents below 1 uA with retention, and rich connectivity including USB, UART, SPI, I2C, and 10-bit ADC. The 28-UQFN (MV) package is the smallest footprint option in the family, ideal for space-constrained wearable and IoT designs.
Typical applications include USB HID peripherals, wearable health sensors, IoT edge nodes with USB charging, consumer electronics with USB-C interfaces, and battery-powered sensor hubs that require periodic USB enumeration for firmware updates or data sync.
When designing with this device, plan the VBUS/USB pin protection network carefully, use the internal voltage regulator with adequate bulk capacitance on VCAP, and leverage the deep-sleep CIPs to minimize average current in battery-powered deployments.
Drop-in alternatives for PIC24FJ32GU202-I/MV — 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 PIC24FJ32GU202-I/MV (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Timers, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32GU202-I/ML
✅ Drop-In✓ In Stock
$2.41 / Unit
View Datasheet →PIC24FJ64GU202-I/MV
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.21 / Unit
View Datasheet →PIC24FJ128GU202-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ32GU202-E/MV
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC24FJ32GU202-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit Harvard RISC) |
| Maximum Clock Frequency | 32 MHz |
| CPU Performance | 16 MIPS |
| Program Memory (Flash) | 32 KB (11K x 24) |
| RAM | 8 KB |
| Flash ECC | Yes (hardware ECC) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| USB Interface | USB 2.0 Full-Speed Host/Device/OTG (on-chip transceiver) |
| Package | 28-UQFN (4x4 mm) - 'MV' designator |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C (Industrial, 'I' suffix) |
| MSL Level | MSL3 (per Microchip packaging profile) |
| RoHS Status | Compliant |
PIC24FJ32GU202-I/MV Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0V to 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 reference |
| Pin 6 | RA4 — Port A bit 4 |
| Pin 7 | RA5 — Port A bit 5 |
| Pin 8 | RA6 — Port A bit 6 / oscillator |
| Pin 9 | RA7 — Port A bit 7 / oscillator |
| Pin 10 | RB0 — Port B bit 0 / programming |
| Pin 11 | RB1 — Port B bit 1 |
| Pin 12 | RB2 — Port B bit 2 |
| Pin 13 | RB3 — Port B bit 3 |
| Pin 14 | RB4 — Port B bit 4 / SDA |
| Pin 15 | RB5 — Port B bit 5 / SCL |
| Pin 16 | RB6 — Port B bit 6 / ICSCLK |
| Pin 17 | RB7 — Port B bit 7 / ICSDAT |
| Pin 18 | D+ — USB D+ data line (GU variant only) |
| Pin 19 | D- — USB D- data line (GU variant only) |
| Pin 20 | VBUS — USB VBUS sensing input (GU variant only) |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 |
| Pin 28 | VSS — Ground reference (also exposed pad) |
Typical Applications
PIC24FJ32GU202-I/MV is suitable for 6 applications: USB HID Peripheral Devices, Wearable Health Sensors, IoT Edge Nodes with USB Update, Consumer Electronics with USB-C, USB Battery Charging Controllers, Industrial Sensor Hubs with USB Diagnostics.
USB HID Peripheral Devices
The PIC24FJ32GU202-I/MV's integrated USB 2.0 Full-Speed Host/Device/OTG controller with on-chip transceiver makes it ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. The 32 MHz/16 MIPS PIC24F core handles HID report processing in real time while the 8 KB RAM accommodates USB endpoint buffers and HID report descriptors. Engineers leverage the device's hardware ECC on Flash for firmware integrity over long lifecycles. Placed on the PCB between the USB-C connector and the button matrix, the MCU enumerates without external pull-up resistors required for full-speed USB, saving BOM cost and PCB area.
Recommended
Wearable Health Sensors
The PIC24FJ32GU202-I/MV's extreme-low-power (XLP) sleep current in the few-hundred-nA range with SRAM retention enables multi-month coin-cell operation in wearable health sensors such as heart-rate monitors, pulse oximeters, and continuous glucose monitor (CGM) encoders. The 16-bit ADC and CIPs handle sensor sampling and signal conditioning autonomously, allowing the CPU to remain asleep until a measurement is ready. The 28-UQFN (4x4 mm) package fits comfortably on a wrist-strap PCB, and USB-C connectivity enables both charging and firmware updates without an external interface IC, supporting field-upgradable medical firmware.
Recommended
IoT Edge Nodes with USB Update
IoT edge nodes that occasionally need USB connectivity for firmware updates or data sync benefit from the PIC24FJ32GU202-I/MV's integrated USB 2.0 OTG and low-power sleep modes. The 32 KB ECC Flash provides safe firmware storage with single-bit error correction, critical for over-the-air or USB-delivered firmware updates in industrial sensor nodes. The device can spend most of its life in deep-sleep with retention, waking only to take sensor readings or service USB enumeration events. A typical implementation runs the MCU at 2.0V from a Li-coin cell and enumerates as a CDC device when a host connects, enabling field updates without JTAG access.
Recommended
Consumer Electronics with USB-C
Consumer products adopting USB-C for both charging and data benefit from the PIC24FJ32GU202-I/MV's on-chip USB transceiver, which interfaces directly to a USB-C port without external charge pumps. Applications include USB-C headphones with active noise cancellation controllers, USB-powered LED controllers, and USB-C smart-home hubs where the MCU manages enumeration, power negotiation, and a control plane for downstream peripherals. The 16 MIPS performance supports real-time USB isochronous audio, while 8 KB of RAM is sufficient for typical CDC/HID/MSD class stacks running on Microchip's MLA USB library.
Recommended
USB Battery Charging Controllers
Dedicated USB battery charging cradles and stand-alone chargers use the PIC24FJ32GU202-I/MV as the control MCU for BC1.2-compliant detection, charge-profile management, and user feedback. The device's USB OTG capability enumerates as either a host (for testing downstream devices) or a device (for charging), and the 10-bit ADC monitors battery voltage and current with hardware averaging. Hardware ECC Flash ensures the charge profile firmware remains uncorrupted over the product's lifetime, important for safety-critical charging in e-mobility and medical-cart batteries.
Recommended
Industrial Sensor Hubs with USB Diagnostics
Industrial 4-20 mA loop-powered sensor hubs that occasionally need USB diagnostics ports for field calibration leverage the PIC24FJ32GU202-I/MV's industrial -40C to +85C grade and integrated USB. The CIPs (configurable logic cells, 16-bit timers) handle sensor linearization and PWM output autonomously, while the CPU sleeps until USB enumeration. The 28-UQFN package mounts on compact 25x30 mm sensor-hub PCBs and operates from the regulated 3.3V loop supply. Field engineers connect a USB host to view live readings or push calibration tables, eliminating JTAG access requirements for routine maintenance.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32GU202-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32GU202-I/ML | PIC24FJ64GU202-I/MV | PIC24FJ128GU202-I/MV | PIC24FJ32GU202-E/MV |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (MV) 4x4 mm | 28-QFN (ML) 6x6 mm - same die, different package | 28-UQFN (MV) 4x4 mm - identical | 28-UQFN (MV) 4x4 mm - identical | 28-UQFN (MV) 4x4 mm - identical |
| Flash Memory | 32 KB (11K x 24) ECC | 32 KB ECC (same die) | 64 KB ECC (+100%) | 128 KB ECC (+300%) | 32 KB ECC (same) |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB Interface | USB 2.0 FS Host/Device/OTG | USB 2.0 FS Host/Device/OTG | USB 2.0 FS Host/Device/OTG | USB 2.0 FS Host/Device/OTG | USB 2.0 FS Host/Device/OTG |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V |
| Core Performance | 16 MIPS at 32 MHz | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
Key Differentiators
- Smallest USB-capable PIC24 footprint option (vs PIC24FJ32GU202-I/ML)
- Scalable Flash in identical footprint (vs PIC24FJ64GU202-I/MV)
- Extended-temperature grade drop-in (vs PIC24FJ32GU202-E/MV)
Design Notes
The PIC24FJ32GU202-I/MV's integrated USB 2.0 transceiver operates directly from VBUS without an external charge pump, simplifying the BOM. However, the VDD rail must remain within 2.0V-3.6V and the VCAP pin requires a 4.7 uF or larger low-ESR decoupling capacitor (X7R 0805 minimum). Estimated: at 32 MHz active and 3.3V supply, the core draws approximately 8-10 mA; deep-sleep with retention drops to a few hundred nA per Microchip XLP datasheet metrics. Use a ferrite bead between VBUS and VDD to isolate USB inrush transients from the regulated MCU supply.
The 28-UQFN (MV) package exposes the VSS thermal pad on the underside - it MUST be soldered to a continuous ground copper pour with at least 4 thermal vias (0.3 mm drill) to the inner ground plane for proper electrical reference and modest thermal dissipation. Place the 32.768 kHz crystal traces within 5 mm of OSCI/OSCO and guard them with a ground ring to reduce noise pickup. D+/D- traces must be 90 ohm differential, length-matched within 1 mm, and routed over a continuous ground plane per USB 2.0 spec to meet signal-integrity requirements at Full Speed (12 Mbps).
Do not omit the 4.7 uF VCAP capacitor - the internal 1.8V/1.2V core regulator will not start up without it. Do not apply VBUS before VDD is stable, as this can back-power the MCU through the USB transceiver; use a power-mux IC (or appropriate Schottky/load-switch arrangement) if VBUS may arrive first. Also note that PIC24FJ32GU202 (GU) and PIC24FJ32GP202 (GP) differ only in USB presence - designators are not interchangeable in firmware, and a 'GP' part cannot enumerate on USB. Verify the marked line on the top of the package before flashing production units.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade ('I' suffix, -40C to +85C) - not AEC-Q100 qualified; for AEC-Q100 automotive applications choose AEC-Q100-qualified 'GP2'/'GU2' variants or external qualification review.
