PIC24FJ32GU205-I/PT - 16-bit 32MHz 32KB Flash USB MCU TQFP-48 | Microchip
MPN: PIC24FJ32GU205-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.62 | $36.20 |
| 100 | $3.05 | $305.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.34 | $2,340.00 |
PIC24FJ32GU205-I/PT Overview
A PIC microcontroller (Programmable Integrated Circuit) is a single-chip computer built around a RISC core, on-chip Flash for program storage, RAM for data, and a rich set of peripherals. PIC24F devices use a 16-bit modified Harvard architecture, positioning them between 8-bit PIC16/PIC18 parts and 32-bit PIC32 parts. They are widely used in low-power, mixed-signal embedded designs that need deterministic behavior and a small footprint without stepping up to ARM Cortex-M silicon. Within the broader taxonomy, the PIC24FJ32GU205 belongs to: microcontroller -> 16-bit MCU -> PIC24F family -> eXtreme Low Power subfamily -> USB-enabled GU2 series.
Key features include four 16-bit timers, a 12-bit A/D converter with up to 13 channels, configurable logic cells, multiple UART/SPI/I2C peripherals, and a hardware RTCC. The on-chip Full-Speed USB 2.0 transceiver and SIE simplify designs that need USB device, host, or OTG without an external PHY. ECC Flash improves reliability in industrial and consumer applications by detecting single-bit errors at runtime. The 48-pin TQFP provides ample GPIO while remaining compatible with hand-solderable prototypes and standard 0.5 mm pitch reflow profiles.
Typical applications include low-power USB peripherals (HID, CDC, custom HID sensors), portable medical instruments, e-metering and sensor hubs, consumer accessories that exchange data via USB OTG, and battery-powered IoT edge nodes where the XLP sleep modes extend operating life. Designers choose this part when USB connectivity is mandatory but the BOM cost and complexity of an ARM Cortex-M part is not justified.
When designing with this device, verify the USB bus-power rail current budget and ensure VBUS detection is correctly implemented for self-powered vs bus-powered topologies. Decouple VDD/VUSB with 100nF + 4.7uF ceramics placed close to the pins; the on-chip PLL requires a clean analog supply. Use the Microchip MPLAB X IDE and the free MPLAB Code Configurator (MCC) plugin to generate peripheral drivers and USB stacks quickly. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ32GU205-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 PIC24FJ32GU205-I/PT (same form factor and footprint) — differing in Package, Mounting Type, ADC, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32GU205-E/PT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC24FJ32GP205T-I/PT
✅ Drop-In✓ In Stock
$2.02 / Unit
View Datasheet →PIC24FJ32GB004-I/PT
✅ Drop-In✓ In Stock
$3.72 / Unit
View Datasheet →PIC24FJ32GU205-I/PT Maximum Ratings & Electrical Characteristics
| Product Family | PIC24F GP2/GU2 eXtreme Low Power (XLP) Microcontrollers |
| Core Architecture | 16-bit PIC24F RISC (modified Harvard) |
| Maximum CPU Clock | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (11K x 24 words, ECC protected) |
| Data RAM | 8 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| USB Interface | Full-Speed USB 2.0 Host/Device/OTG (on-chip transceiver and SIE) |
| ADC | 12-bit, up to 13 input channels |
| Timers | 4 x 16-bit timers |
| Communication Peripherals | UART, SPI, I2C (multiple instances) |
| GPIO Count | Up to 37 (depending on configuration) |
| RTCC | Real-Time Clock/Calendar with backup registers |
| Configurable Logic Cells (CLC) | Yes (multiple CLCs) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 48-pin TQFP (PT) 7x7 mm |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Compliant per Microchip product page |
| MSL Level | 3 (per package handling guidelines) |
PIC24FJ32GU205-I/PT Pin Configuration
| Pin 1 | RA0 — GPIO / analog input AN0 |
| Pin 2 | RA1 — GPIO / analog input AN1 |
| Pin 3 | RA2 — GPIO / analog input AN2 |
| Pin 4 | RA3 — GPIO / analog input AN3 |
| Pin 5 | RA4 — GPIO / analog input AN4 |
| Pin 6 | RA5 — GPIO / analog input AN5 |
| Pin 7 | RA6 — GPIO / analog input AN6 |
| Pin 8 | RA7 — GPIO / analog input AN7 |
| Pin 9 | RA8 — GPIO |
| Pin 10 | RA9 — GPIO |
| Pin 11 | RA10 — GPIO |
| Pin 12 | RA11 — GPIO |
| Pin 13 | RA12 — GPIO |
| Pin 14 | RA13 — GPIO |
| Pin 15 | RA14 — GPIO |
| Pin 16 | RA15 — GPIO |
| Pin 17 | OSCI — Crystal oscillator input |
| Pin 18 | OSCO — Crystal oscillator output |
| Pin 19 | SOSCI — Secondary crystal input (32 kHz) |
| Pin 20 | SOSCO — Secondary crystal output (32 kHz) |
| Pin 21 | VDD — Digital supply voltage (2.0-3.6V) |
| Pin 22 | VSS — Digital ground |
| Pin 23 | RB0 — GPIO / PGED1 (programming data) |
| Pin 24 | RB1 — GPIO / PGEC1 (programming clock) |
| Pin 25 | RB2 — GPIO / analog input AN8 |
| Pin 26 | RB3 — GPIO / analog input AN9 |
| Pin 27 | RB4 — GPIO / analog input AN10 |
| Pin 28 | RB5 — GPIO / analog input AN11 |
| Pin 29 | RB6 — GPIO / analog input AN12 |
| Pin 30 | RB7 — GPIO / analog input AN13 |
| Pin 31 | RB8 — GPIO |
| Pin 32 | RB9 — GPIO |
| Pin 33 | RB10 — GPIO |
| Pin 34 | RB11 — GPIO |
| Pin 35 | RB12 — GPIO |
| Pin 36 | RB13 — GPIO |
| Pin 37 | RB14 — GPIO |
| Pin 38 | RB15 — GPIO |
| Pin 39 | VUSB — USB transceiver supply (3.0-3.6V) |
| Pin 40 | VBUS — USB VBUS detection input |
| Pin 41 | D+ — USB data plus |
| Pin 42 | D- — USB data minus |
| Pin 43 | RC1 — GPIO |
| Pin 44 | RC2 — GPIO |
| Pin 45 | RC3 — GPIO |
| Pin 46 | RC4 — GPIO |
| Pin 47 | MCLR — Master clear reset (active-low) |
| Pin 48 | AVDD — Analog supply voltage |
Typical Applications
PIC24FJ32GU205-I/PT is suitable for 6 applications: Low-Power USB HID Peripherals, USB CDC Serial Port Emulation, Portable Medical Sensor Hub, USB-OTG Consumer Accessory, Battery-Powered IoT Edge Sensor, Industrial USB Data Logger.
Low-Power USB HID Peripherals
The PIC24FJ32GU205-I/PT's on-chip Full-Speed USB 2.0 transceiver and SIE make it an ideal fit for low-power USB HID peripherals such as custom keyboards, mice, joysticks, and sensor-reporting devices. The 32 KB ECC Flash is more than sufficient to host a USB HID class stack plus application code, while the 8 KB RAM handles HID report buffers and protocol state. Its XLP sleep modes drop current to a few hundred nanoamperes, allowing battery-powered HID devices to last months on a single AAA cell. Place a 100nF + 4.7uF ceramic decoupling pair on VDD and VUSB, and use a USB Type-A or Micro-B connector with proper ESD protection. Compared with a discrete USB MCU, this part eliminates the need for an external PHY, reducing BOM cost and PCB area.
Recommended
USB CDC Serial Port Emulation
The PIC24FJ32GU205-I/PT excels at USB Communications Device Class (CDC) virtual COM port applications, replacing legacy RS-232 interfaces with a single-chip USB solution. Its on-chip USB SIE handles framing, enumeration, and packet handling without CPU intervention, leaving MIPS budget for application processing. The 12-bit ADC with up to 13 input channels supports bridge sensor monitoring, while four 16-bit timers enable precise baud-rate generation and PWM control. In a CDC design, route D+/D- through 27-33 ohm series resistors and add a USBLC6-2SC6 ESD diode on the connector side. The PT TQFP-48 footprint provides ample GPIO for UART bridges, GPIO expander functions, or boot-loader programming via USB.
Recommended
Portable Medical Sensor Hub
The PIC24FJ32GU205-I/PT's eXtreme Low Power architecture and on-chip USB make it well suited to portable medical sensor hubs that stream data over USB to a host PC or tablet. Sleep current in the few-hundred-nanoampere range allows multi-day battery operation between charges, while the 12-bit ADC with multiple input channels can digitize signals from temperature, pulse-oximetry, or strain-gauge sensors. The CLC (Configurable Logic Cell) peripherals can implement simple analog-front-end glue logic without external gates, and the RTCC with backup registers enables accurate timestamping of measurements. In medical designs, the 32 KB ECC Flash provides additional reliability for safety-critical data paths. The TQFP-48 package allows easy integration into handheld enclosures with USB Type-C charging ports.
Recommended
USB-OTG Consumer Accessory
The PIC24FJ32GU205-I/PT supports USB On-The-Go, allowing a portable consumer accessory to act as both USB device (when plugged into a host) and USB host (when reading from a USB mass-storage or HID dongle). This dual-role capability, combined with 32 KB of Flash and 8 KB of RAM, makes the part suitable for portable media players, smart-home controllers, and accessory dongles that exchange data via USB sticks. The industrial temperature grade ensures reliable operation across typical consumer environments. Designers can leverage Microchip's free USB Host Stack library for mass-storage and HID class support, while the CLC peripherals handle button debouncing and LED PWM. The PT TQFP-48 pinout provides ample GPIO for display, button, and battery-management connections.
Recommended
Battery-Powered IoT Edge Sensor
The PIC24FJ32GU205-I/PT's XLP technology and USB convenience combine into a strong fit for battery-powered IoT edge sensor nodes that occasionally connect to a host for data upload. Sleep current measured in nanoamperes allows years of operation on AA cells, while the on-chip USB enables convenient configuration, firmware update, and data download without a separate debug probe. The 12-bit ADC handles analog sensor readings, the RTCC provides timestamped event logging, and the CLC peripherals implement low-power wake-on-event logic. In a typical deployment, the MCU wakes on a sensor interrupt, samples, optionally aggregates to RAM, then returns to sleep - only powering the USB transceiver when a host is physically attached. The TQFP-48 footprint is hand-solderable for prototype builds.
Recommended
Industrial USB Data Logger
The PIC24FJ32GU205-I/PT's combination of USB connectivity, generous Flash/RAM, and industrial temperature grade makes it suitable for industrial data loggers that record analog/digital process variables and offload data via USB to a host PC. The 32 KB ECC Flash can host a small file system or rotating buffer, while 8 KB RAM supports temporary buffer aggregation between USB transfers. The on-chip 12-bit ADC digitizes process voltages at up to 13 channels, and the hardware RTCC timestamps every sample. With the TQFP-48 package and industrial -40C to +85C rating, the part withstands factory floor environments and offers easy integration into DIN-rail enclosures with USB Type-B ports for convenient data retrieval by maintenance staff.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32GU205-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32GU205-E/PT | PIC24FJ32GP205T-I/PT | PIC24FJ32GB004-I/PT |
|---|---|---|---|---|
| Package | TQFP-48 (PT) 7x7 mm | TQFP-48 (PT) 7x7 mm - same | TQFP-48 (PT) 7x7 mm - same | TQFP-48 (PT) 7x7 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | PIC24F 16-bit RISC | PIC24F 16-bit RISC - same | PIC24F 16-bit RISC - same | PIC24F 16-bit RISC - same |
| Maximum CPU Clock | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Flash Program Memory | 32 KB (ECC) | 32 KB (ECC) | 32 KB | 32 KB |
| Data RAM | 8 KB | 8 KB | 8 KB | 8 KB |
| USB Peripheral | Full-Speed USB 2.0 Host/Device/OTG (on-chip) | Full-Speed USB 2.0 Host/Device/OTG (on-chip) | No USB (GP2 variant) | Full-Speed USB 2.0 (legacy GB series) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| ADC | 12-bit, up to 13 channels | 12-bit, up to 13 channels | 12-bit, up to 13 channels | 10-bit, fewer channels (legacy) |
Key Differentiators
- On-chip Full-Speed USB with Host/Device/OTG and integrated transceiver (vs PIC24FJ32GP205T-I/PT)
- ECC-protected Flash with XLP technology in same 48-pin TQFP (vs PIC24FJ32GB004-I/PT)
- 32KB Flash and 8KB RAM at industrial temperature range (vs PIC24FJ32GU205-E/PT)
Design Notes
The PIC24FJ32GU205-I/PT requires two separate supply rails: VDD (2.0-3.6V) for digital logic and VUSB (3.0-3.6V) for the on-chip USB transceiver. Decouple each pin with a 100nF ceramic plus a bulk 4.7uF capacitor placed within 5 mm of the pin. For USB-powered designs, route VBUS through a low-dropout regulator (such as MCP1700) to generate VDD; the USB SIE can then negotiate both bus-powered and self-powered topologies. The on-chip POR and BOR circuits handle reset sequencing reliably across the 2.0V minimum, simplifying power-on firmware.
Place the 12 MHz primary crystal as close as possible to the OSCI/OSCO pins, with guard traces to ground and short, symmetrical trace lengths to minimize loading capacitance mismatch. The 32 kHz secondary crystal (SOSCI/SOSCO) should be similarly isolated for RTCC accuracy. Route D+/D- as a 90-ohm differential pair with no stubs, keeping the pair length under 50 mm where possible. Add a USBLC6-2SC6 ESD diode array as close to the USB connector as possible to protect the on-chip transceiver from ESD events during cable insertion.
A common pitfall when designing with the PIC24FJ32GU205-I/PT is forgetting to configure the JTAG/ICSP pins (RB0/RB1) as analog or digital inputs in firmware before first programming. If left in analog mode by default, the PICkit cannot drive them and programming will fail. Always include a debug configuration that sets PGED1/PGEC1 to digital mode in the init code, or use the MPLAB X IDE default configuration. Additionally, VBUS detection must be correctly implemented in firmware to differentiate bus-powered vs self-powered topologies - incorrect detection can cause USB enumeration failures or VBUS back-power issues in self-powered designs.
Compliance Information
RoHS and REACH compliance confirmed per Microchip product page. Not AEC-Q100 qualified - the part targets industrial/consumer, not automotive. For automotive USB designs consider PIC24FJ32GU405-I/PT (AEC-Q100 grade).
