PIC24FJ64GU205T-I/M4 - 16-bit MCU, 64KB Flash, USB | Microchip
MPN: PIC24FJ64GU205T-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.18 | $4.18 |
| 10 | $3.78 | $37.80 |
| 100 | $3.39 | $339.00 |
| 500 | $2.96 | $1,480.00 |
| 1,000 | $2.65 | $2,650.00 |
PIC24FJ64GU205T-I/M4 Overview
The PIC24FJ family is a 16-bit microcontroller line from Microchip positioned between the 8-bit PIC16/PIC18 families and the 32-bit PIC32MX/dsPIC families. Within the 16-bit MCU hierarchy it belongs to the eXtreme Low-Power (XLP) sub-family and the GP2/GU2 peripheral set, which together target portable, USB-connected, low-duty-cycle embedded products. The PIC24FJ64GU205 specifically is the highest-density member of the low-pin-count GP2/GU2 sub-family, giving designers the largest on-chip memory of that group while still fitting into packages as small as 48 pins.
Key features of this part include hardware USB 2.0 Full-Speed On-The-Go support that eliminates external transceivers, ECC on Flash for improved reliability in safety-relevant firmware, multiple serial interfaces (I2C/SPI/UART) for sensor and peripheral expansion, and configurable 16-bit timers plus Capture/Compare/PWM modules for motor, lighting and signal-conditioning loops. The integrated 12-bit ADC and analog comparators remove the need for external signal conditioning on simple analog front ends.
In the architecture itself, a wide datapath with modifier lanes handles 16-bit arithmetic and DSP-style operations more efficiently than an 8-bit core, while the XLP design techniques (deep-sleep modes, peripheral clock gating, retention RAM) keep average current draw low. The combination of hardware USB, ECC Flash and CIPs (such as CLC, MCCP and DMA-like blocks) lets firmware implement complex behaviours with very little CPU involvement.
Typical applications for the PIC24FJ64GU205T-I/M4 include USB peripherals such as human-interface devices, CDC virtual COM ports and USB audio class devices, wearable health and fitness sensor hubs, low-power IoT sensor nodes with USB firmware-update channels, and industrial data loggers that need ECC Flash for long-term retention. The USB OTG capability also makes it a candidate for tablet- or phone-connected accessories.
When designing around this MCU, allocate adequate decoupling on VDD/VUSB and follow Microchip's USB PCB layout rules for the D+/D- pair to remain USB-IF compliant; designers should also size the LDO or battery source to handle the inrush when the USB transceiver starts up. This page consolidates distributor pricing, drop-in alternatives and practical design notes that are not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ64GU205T-I/M4 — 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 PIC24FJ64GU205T-I/M4 (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GU205-I/M4
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC24FJ64GU205T-E/M4
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GU205T-I/M4
✅ Drop-In✓ In Stock
$1.9 / Unit
View Datasheet →PIC24FJ64GU202T-I/M4
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GU205T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GA705T-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.1 / Unit
View Datasheet →PIC24FJ64GU205T-I/M4 Maximum Ratings & Electrical Characteristics
| Core | PIC24 (16-bit modified Harvard) |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Memory | 64 KB ECC Flash |
| Data Memory (RAM) | 8 KB |
| USB | USB 2.0 Full-Speed Host/Device/OTG |
| ADC | 12-bit, up to 400 Ksps |
| Analog Comparators | 3 |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Package | 48-pin UQFN (M4) 6x6 mm |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
| Core Independent Peripherals | Yes (CLC, MCCP, configurable logic) |
| Serial Interfaces | I2C / SPI / UART |
| Timers | 16-bit (multiple) |
| eXtreme Low Power (XLP) | Yes |
PIC24FJ64GU205T-I/M4 Pin Configuration
| Pin 1 | RA0 — Port A bit 0 (analog/digital) |
| Pin 2 | RA1 — Port A bit 1 (analog/digital) |
| Pin 3 | RA2 — Port A bit 2 (analog/digital) |
| Pin 4 | RA3 — Port A bit 3 (analog/digital) |
| Pin 5 | RA4 — Port A bit 4 (analog/digital) |
| Pin 6 | VDD — Core supply voltage |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA5 — Port A bit 5 (analog/digital) |
| Pin 9 | RA6 — Port A bit 6 (analog/digital) |
| Pin 10 | RA7 — Port A bit 7 (analog/digital) |
| Pin 11 | RB0 — Port B bit 0 (digital I/O) |
| Pin 12 | RB1 — Port B bit 1 (digital I/O) |
| Pin 13 | RB2 — Port B bit 2 (digital I/O) |
| Pin 14 | RB3 — Port B bit 3 (digital I/O) |
| Pin 15 | RB4 — Port B bit 4 (digital I/O, SDA1) |
| Pin 16 | RB5 — Port B bit 5 (digital I/O, SCL1) |
| Pin 17 | RB6 — Port B bit 6 (digital I/O, PGD) |
| Pin 18 | RB7 — Port B bit 7 (digital I/O, PGC) |
| Pin 19 | RC0 — Port C bit 0 (digital I/O) |
| Pin 20 | RC1 — Port C bit 1 (digital I/O, OE) |
| Pin 21 | RC2 — Port C bit 2 (digital I/O, D-/UART) |
| Pin 22 | VDD — Core supply voltage |
| Pin 23 | VSS — Ground reference |
| Pin 24 | RC3 — Port C bit 3 (digital I/O, D+) |
| Pin 25 | RC4 — Port C bit 4 (digital I/O) |
| Pin 26 | RC5 — Port C bit 5 (digital I/O) |
| Pin 27 | RC6 — Port C bit 6 (digital I/O) |
| Pin 28 | RC7 — Port C bit 7 (digital I/O) |
| Pin 29 | RD0 — Port D bit 0 (digital I/O) |
| Pin 30 | RD1 — Port D bit 1 (digital I/O) |
| Pin 32 | RD2 — Port D bit 2 (digital I/O) |
| Pin 33 | RD3 — Port D bit 3 (digital I/O) |
| Pin 34 | RD4 — Port D bit 4 (digital I/O) |
| Pin 35 | RD5 — Port D bit 5 (digital I/O) |
| Pin 36 | RD6 — Port D bit 6 (digital I/O) |
| Pin 37 | RD7 — Port D bit 7 (digital I/O) |
| Pin 38 | VUSB — USB transceiver supply (3.3V LDO output) |
| Pin 39 | VBUS — USB VBUS sensing input |
| Pin 40 | D- — USB D- differential data line |
| Pin 41 | D+ — USB D+ differential data line |
| Pin 42 | VDD — Core supply voltage |
| Pin 43 | VSS — Ground reference |
| Pin 44 | OSC1 — External oscillator input / crystal |
| Pin 45 | OSC2 — External oscillator output / crystal |
| Pin 46 | MCLR — Master Clear (reset) input, active-low |
| Pin 47 | RE0 — Port E bit 0 (digital I/O) |
| Pin 48 | RE1 — Port E bit 1 (digital I/O) |
| Pin 31 | NC — Not connected (pin reserved per package outline) |
| Pin 11 | RB0 — Port B bit 0 (digital I/O, INT0) |
Typical Applications
PIC24FJ64GU205T-I/M4 is suitable for 6 applications: USB Human Interface Devices (HID), USB CDC Virtual COM Port Bridges, Wearable Health and Fitness Sensor Hubs, Low-Power IoT Sensor Nodes with USB Firmware Update, Industrial Data Loggers, USB Audio Class Devices.
USB Human Interface Devices (HID)
The PIC24FJ64GU205T-I/M4 is well matched to USB HID peripherals such as keyboards, mice, game controllers and custom input devices. According to the Microchip PIC24FJ64GU205 family datasheet, the integrated Full-Speed USB 2.0 Host/Device/OTG transceiver removes the need for an external PHY and adds an internal USB regulator that simplifies the bus- and VUSB-power tree. The 64 KB ECC Flash and 8 KB RAM are sufficient for the USB HID class driver plus application firmware, while 16 MIPS throughput keeps polling latency low. Core Independent Peripherals such as CLC and MCCP offload debouncing and PWM generation from the CPU, further reducing interrupt load. The XLP sleep modes (a few hundred nA with RAM retention) suit battery-powered wireless mice or presenters.
Recommended
USB CDC Virtual COM Port Bridges
The PIC24FJ64GU205T-I/M4 is a natural choice for USB-to-UART bridges that present as a CDC ACM virtual COM port on the host. The on-chip USB 2.0 Full-Speed transceiver handles enumeration and bulk transfers without an external chip, freeing board space, while the integrated UART, I2C and SPI peripherals let the bridge expose multiple legacy busses. The 64 KB ECC Flash fits the CDC class stack plus command-line firmware (e.g. MCP2221-style behaviour) and the 8 KB RAM accommodates dual-bank USB endpoint buffers. Industrial temperature grade (-40C to +85C) makes the part suitable for factory-floor test fixtures and lab instruments. ECC Flash also helps detect/correct single-bit errors in long-lifetime devices such as bench equipment that remains in service for many years.
Recommended
Wearable Health and Fitness Sensor Hubs
The PIC24FJ64GU205T-I/M4 is well suited to wearable health and fitness sensor hubs thanks to its XLP eXtreme Low-Power architecture and integrated USB for charging and data sync. Sleep currents in the few-hundred-nA range (with RAM retention, per the Microchip product page) extend battery life between charges, while the 12-bit 400 Ksps ADC and three analog comparators connect directly to photoplethysmography (PPG), temperature and bio-impedance sensors without external signal conditioning. The 64 KB ECC Flash stores algorithm code, calibration tables and step counters, and ECC improves reliability in safety-relevant firmware. The Full-Speed USB OTG port allows the same connector to be used for charging, firmware update and streaming raw sensor data to a host application.
Recommended
Low-Power IoT Sensor Nodes with USB Firmware Update
The PIC24FJ64GU205T-I/M4 fits battery-powered IoT sensor nodes that occasionally tether to a host via USB for firmware update and data offload. According to the Microchip family datasheet, XLP deep-sleep modes and peripheral clock gating allow average current draw in the microamp range when only a wake-up timer is running, while the 64 KB ECC Flash stores application plus bootloader for USB DFU (device firmware upgrade). The integrated USB OTG port allows the node to act as a USB device and stream collected sensor data when plugged in. CIPs such as CLC and MCCP handle signal conditioning and PWM-driven sensor excitation without waking the CPU, further reducing average power. ECC Flash protects long-retention data such as calibration constants from bit-rot over multi-year deployments.
Recommended
Industrial Data Loggers
The PIC24FJ64GU205T-I/M4 is a strong fit for industrial USB-attached data loggers used in factory automation and process monitoring. The 64 KB ECC Flash retains logged events and configuration parameters across power cycles, and ECC protects against single-bit errors that could otherwise corrupt long-term records - an important consideration in regulated industries such as pharmaceuticals or food processing. The 12-bit 400 Ksps ADC samples multiple analog channels (vibration, temperature, 4-20 mA loops) with on-chip comparators providing threshold detection, while I2C/SPI/UART ports connect to digital sensors and isolated communication links. The industrial -40C to +85C temperature range and Full-Speed USB OTG port enable direct host connectivity for log retrieval without external bridge ICs.
Recommended
USB Audio Class Devices
The PIC24FJ64GU205T-I/M4 can serve as the host-side controller in USB audio class devices such as USB headsets, USB microphones and USB speakers. According to the Microchip PIC24FJ64GU205 family datasheet, the integrated Full-Speed USB 2.0 OTG transceiver supports isochronous USB audio endpoints, and the 16 MIPS 16-bit core plus DMA-style CIPs sustain the small packet intervals required for jitter-free audio streaming. The 12-bit ADC and PWM-driven outputs can drive simple headphone amplifiers or line outputs, while I2C/SPI ports configure external audio codecs and DACs. The 64 KB ECC Flash holds the USB Audio class stack plus application firmware. XLP sleep modes also help battery-powered USB speakers meet standby-power targets between playback sessions.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GU205T-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GU205-I/M4 | PIC24FJ64GU205T-E/M4 | PIC24FJ32GU205T-I/M4 | PIC24FJ64GU202T-I/M4 | PIC24FJ64GU205T-I/MV | PIC24FJ64GA705T-I/M4 |
|---|---|---|---|---|---|---|---|
| Package | 48-pin UQFN (M4) 6x6 mm | 48-pin UQFN (M4) 6x6 mm - same | 48-pin UQFN (M4) 6x6 mm - same | 48-pin UQFN (M4) 6x6 mm - same | 48-pin UQFN (M4) 6x6 mm - same | 48-pin UQFN (M4) 6x6 mm - same | 48-pin UQFN (M4) 6x6 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB ECC | 64 KB ECC | 64 KB ECC | 32 KB ECC | 64 KB ECC | 64 KB ECC | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB | 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 | USB 2.0 FS Host/Device/OTG | No integrated USB OTG |
| 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 | 32 MHz / 16 MIPS |
| Temperature Grade | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Packaging Form | Tape & Reel (T suffix) | Tray (no T suffix) | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel (MV reel code) | Tape & Reel |
| Sub-family | PIC24FJ GU2 (USB) | PIC24FJ GU2 (USB) | PIC24FJ GU2 (USB) | PIC24FJ GU2 (USB) | PIC24FJ GU2 (USB) | PIC24FJ GU2 (USB) | PIC24FJ GA7 (no USB) |
Key Differentiators
- Highest-density member of the 48-pin PIC24FJ GP2/GU2 sub-family (vs PIC24FJ32GU205T-I/M4)
- Integrated USB 2.0 Full-Speed Host/Device/OTG transceiver (vs PIC24FJ64GA705T-I/M4)
- Extended-temperature sibling available with same pinout (vs PIC24FJ64GU205T-E/M4)
Design Notes
USB-IF compliance requires careful PCB layout of the D+ and D- lines. Route D+ and D- as a 90-ohm differential pair with matched length, keep them over a continuous ground plane and place the 15 kB pull-down on D- (device) or 1.5 kB pull-up on D+ (host) close to the IC. Place the VBUS-sense resistor divider near the VBUS pin and add ESD protection diodes rated for IEC 61000-4-2 on D+/D-/VBUS for production designs.
The PIC24FJ64GU205T-I/M4 has separate VDD and VUSB pins; the on-chip USB transceiver draws power from VUSB (typically 3.3V) regardless of VDD level. Decouple VDD with a 100 nF ceramic plus 10 uF bulk cap close to the IC, and decouple VUSB similarly. If the application bus-powers from VBUS only, include a soft-start network on VUSB to limit inrush current at USB plug-in and avoid host-side enumeration failures.
Do not exceed the maximum USB VBUS rating (typically 5.5V) on the VBUS sense pin; use a resistive divider that keeps VBUS below VDD + 0.3V at all times. Ensure the MCLR pin is pulled up through a resistor (10 kB typical) and that the cap on MCLR (if used) is at most 100 nF, otherwise the device may not exit reset reliably. When migrating from the GA7 family, double-check that USB OTG firmware is configured - the GA7 sub-family does not include the USB transceiver.
At the 32 MHz operating point with USB active, the PIC24FJ64GU205T-I/M4 typically dissipates well under 50 mW. Estimated: at VDD = 3.3 V, IDD_ACT ~= 15 mA and IUSB ~= 10 mA, giving roughly 0.08 W total - the 48-pin UQFN (M4) package thermal resistance is sufficient without an external heatsink. However, designers should still place the thermal pad on a copper pour to keep the junction temperature low during continuous USB streaming and to improve long-term reliability in enclosed industrial enclosures.
Compliance Information
RoHS compliant per Microchip product page; AEC-Q100 not qualified (industrial grade only); halogen-free status not explicitly stated in the verified web data and therefore marked unknown.
