PIC24FJ64GU205-E/M4 - 16-bit USB MCU, 64KB Flash, 48-UQFN | Microchip
MPN: PIC24FJ64GU205-E/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.69 | $36.90 |
| 100 | $3.28 | $328.00 |
| 500 | $2.96 | $1,480.00 |
| 1,000 | $2.62 | $2,620.00 |
PIC24FJ64GU205-E/M4 Overview
An MCU (microcontroller) is a single-chip computer that combines a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals such as timers, communication interfaces, and analog blocks. Within the PIC24F sub-family, the 'GU2' variants specifically add a USB 2.0 Full-Speed peripheral alongside the standard peripherals. The PIC24FJ64GU205-E/M4 sits inside the PIC24F -> 16-bit MCU -> microcontroller -> embedded processing taxonomy, and is widely used as a drop-in USB host/device node in cost- and power-sensitive embedded systems.
Key features of the PIC24FJ64GU205-E/M4 include: 64 KB ECC Flash organised as 22K x 24 words for self-correcting code storage, 8 KB RAM, a 16-bit timer/counter architecture that delivers 16 MIPS throughput at 32 MHz, integrated USB 2.0 Full-Speed with on-chip transceiver, and a 12-bit ADC plus multiple serial interfaces (UART, SPI, I2C). The extended ('-E') temperature grade spans -40C to +125C for industrial environments.
Architecturally, the device uses a modified Harvard core with a 16-bit wide instruction path and a deterministic interrupt model, paired with Microchip's nanoWatt XLP technology for ultra-low-power sleep. The hardware USB engine offloads protocol handling from the CPU, freeing MIPS for application code, while the ECC Flash improves reliability for unattended or remote installations.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, low-power IoT sensor nodes with USB diagnostic ports, industrial data loggers, and battery-powered medical instruments. The wide temperature range and small 6x6 mm UQFN footprint also suit compact automotive and consumer designs.
When designing with this part, note that the M4 (UQFN-48) variant has an exposed pad that must be soldered to the board ground plane for thermal and electrical performance; failure to do so can degrade USB signal integrity at high ambient temperatures.
This page synthesises current distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for both parametric data and procurement decisions.
Drop-in alternatives for PIC24FJ64GU205-E/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 PIC24FJ64GU205-E/M4 (same form factor and footprint) — differing in ADC, Package, Core Architecture, Operating Temperature, Mounting Type.
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)
PIC24FJ32GU205-E/M4
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC24FJ64GA705T-I/M4
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC24FJ64GU205-E/M4 Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit |
| Program Memory (Flash) | 64 KB (22K x 24) with ECC |
| Data Memory (SRAM) | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| USB | USB 2.0 Full-Speed with on-chip transceiver |
| ADC | 12-bit |
| Package | 48-pin UQFN (M4) 6x6 mm |
| Operating Temperature | -40C to +125C (E-temp) |
| Low-Power Technology | eXtreme Low-Power (XLP) nanoWatt |
| Communication Interfaces | UART, SPI, I2C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24FJ64GU205-E/M4 Pin Configuration
| Pin 1 | RA0 — GPIO/analog input (I/O) |
| Pin 2 | RA1 — GPIO/analog input (I/O) |
| Pin 3 | RA2 — GPIO/analog input (I/O) |
| Pin 4 | RA3 — GPIO/analog input (I/O) |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RB0 — GPIO (I/O) |
| Pin 8 | RB1 — GPIO (I/O) |
| Pin 9 | RB2 — GPIO (I/O) |
| Pin 10 | RB3 — GPIO (I/O) |
| Pin 11 | RB4 — GPIO (I/O) |
| Pin 12 | RB5 — GPIO/PGED3 programming |
| Pin 13 | RB6 — GPIO/PGEC3 programming |
| Pin 14 | RB7 — GPIO (I/O) |
| Pin 15 | RC0 — GPIO (I/O) |
| Pin 16 | RC1 — GPIO (I/O) |
| Pin 17 | RC2 — GPIO (I/O) |
| Pin 18 | RC3 — GPIO (I/O) |
| Pin 19 | RC4 — GPIO (I/O) |
| Pin 20 | RC5 — GPIO (I/O) |
| Pin 21 | RC6 — GPIO (I/O) |
| Pin 22 | RC7 — GPIO (I/O) |
| Pin 23 | RD0 — GPIO (I/O) |
| Pin 24 | RD1 — GPIO (I/O) |
| Pin 25 | RD2 — GPIO (I/O) |
| Pin 26 | RD3 — GPIO (I/O) |
| Pin 27 | RD4 — GPIO (I/O) |
| Pin 28 | RD5 — GPIO (I/O) |
| Pin 29 | RD6 — GPIO (I/O) |
| Pin 30 | RD7 — GPIO (I/O) |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | OSCI — Crystal oscillator input |
| Pin 34 | OSCO — Crystal oscillator output |
| Pin 35 | RE0 — GPIO (I/O) |
| Pin 36 | RE1 — GPIO (I/O) |
| Pin 37 | RE2 — GPIO (I/O) |
| Pin 38 | RE3 — GPIO (I/O) |
| Pin 39 | RF0 — GPIO (I/O) |
| Pin 40 | RF1 — GPIO (I/O) |
| Pin 41 | D- — USB data minus |
| Pin 42 | D+ — USB data plus |
| Pin 43 | VBUS — USB bus voltage detect |
| Pin 44 | VUSB — USB internal regulator output |
| Pin 45 | MCLR — Master clear reset (active low) |
| Pin 46 | RA4 — GPIO/analog input (I/O) |
| Pin 47 | RA5 — GPIO/analog input (I/O) |
| Pin 48 | RA6 — GPIO/analog input (I/O) |
Typical Applications
PIC24FJ64GU205-E/M4 is suitable for 6 applications: USB HID Peripheral (Keyboard/Mouse/Custom Input), USB-to-UART / USB-to-SPI Bridge, Battery-Powered IoT Sensor Node with USB Diagnostics, Industrial Data Logger, Portable Medical Device Controller, Automotive Infotainment Accessory.
USB HID Peripheral (Keyboard/Mouse/Custom Input)
The PIC24FJ64GU205-E/M4's integrated USB 2.0 Full-Speed engine and 16 MIPS throughput make it well-suited to USB HID class devices such as keyboards, mice, game controllers, and custom input peripherals. The on-chip transceiver removes the need for an external PHY, shrinking the BOM. With 64 KB ECC Flash it fits USB stacks plus HID report descriptors, and XLP sleep modes let battery-powered mice achieve months of runtime. Pin-compatible migration to PIC24FJ64GU205-I/M4 is available for lower-cost consumer variants. Recommended companion parts: PIC24FJ32GU205-E/M4 (smaller Flash variant), MCP2200 (USB-UART bridge for debugging).
Recommended
USB-to-UART / USB-to-SPI Bridge
The PIC24FJ64GU205-E/M4 is widely used as a USB-to-serial bridge, replacing legacy FTDI parts. Its USB Full-Speed peripheral, dual UART, and SPI/I2C master controllers expose PC-side access to legacy serial buses. The 64 KB Flash accommodates USB CDC class drivers and flexible baud-rate translation firmware. XLP sleep current under 1 uA suits always-on industrial bridge dongles powered from the USB bus. The same UQFN-48 footprint allows a single PCB design across both bridge and HID products. Recommended companion parts: MCP2221 (USB-I2C alternative), PIC24FJ128GU405-I/M4 (memory-up variant).
Recommended
Battery-Powered IoT Sensor Node with USB Diagnostics
The PIC24FJ64GU205-E/M4's eXtreme Low-Power XLP architecture delivers sub-microamp sleep currents with RAM retention, letting battery-powered IoT sensor nodes last years on a single coin cell. The integrated USB port is used only for diagnostics, firmware update, or charging, while the MCU spends most of its time asleep waking on sensor interrupts. The 12-bit ADC and multiple serial interfaces support typical environmental sensor arrays (temperature, humidity, pressure). The -40C to +125C range covers outdoor and industrial deployments. Recommended companion parts: PIC24FJ32GU205-E/M4 (lower-power node), MCP9808 (high-accuracy temperature sensor).
Recommended
Industrial Data Logger
The PIC24FJ64GU205-E/M4's 64 KB ECC Flash stores both firmware and rolling data buffers, while 8 KB RAM accommodates temporary sample arrays. The extended -40C to +125C temperature grade and ECC Flash error correction make it reliable in unattended industrial enclosures running 24/7. USB allows field engineers to retrieve log files without opening the enclosure. The on-chip 12-bit ADC reduces external component count for voltage and current measurements. The 48-UQFN footprint fits compact DIN-rail modules. Recommended companion parts: PIC24FJ64GA705-E/M4 (more analog, no USB), MCP1700 (low-Iq LDO for sleep).
Recommended
Portable Medical Device Controller
The PIC24FJ64GU205-E/M4's low sleep current, USB connectivity, and extended temperature grade suit portable medical devices such as glucose meters, pulse oximeters, and handheld diagnostic tools. The USB port enables tethered data upload to clinic software or battery charging, while the 12-bit ADC digitises sensor signals with adequate resolution for diagnostic-grade measurements. ECC Flash prevents code corruption in long-life deployments. The 48-pin UQFN footprint enables thin, compact handheld enclosures. Recommended companion parts: PIC24FJ128GU405-I/M4 (more memory option), MCP1640 (boost converter for battery).
Recommended
Automotive Infotainment Accessory
The PIC24FJ64GU205-E/M4's -40C to +125C extended temperature range, integrated USB, and small 6x6 mm UQFN footprint suit automotive aftermarket infotainment accessories such as USB media readers, charger controllers, and CAN-to-USB gateways. ECC Flash improves reliability in vibration-heavy cabin environments. The MCU's hardware USB engine offloads protocol handling, freeing CPU for CAN bridging or charging-state logic. Designers should still add ESD protection on USB lines (e.g., USBLC6-2SC6) for automotive-grade robustness. Recommended companion parts: PIC24FJ64GB004T-I/PT (CAN-enabled variant), USBLC6-2SC6 (USB ESD protection).
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GU205-E/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GU205-I/M4 | PIC24FJ64GU205T-E/M4 | PIC24FJ32GU205-E/M4 | PIC24FJ64GA705T-I/M4 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Core / Architecture | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit |
| Maximum Clock | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Flash Program Memory | 64 KB ECC | 64 KB ECC | 64 KB ECC | 32 KB (-50%) | 64 KB ECC |
| USB Peripheral | USB 2.0 Full-Speed with on-chip transceiver | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | No USB (GA series) |
| Operating Temperature | -40C to +125C (E-temp) | -40C to +85C (I-temp) | -40C to +125C (E-temp) | -40C to +125C (E-temp) | -40C to +85C (I-temp) |
| Low-Power Technology | eXtreme Low-Power (XLP) | eXtreme Low-Power (XLP) | eXtreme Low-Power (XLP) | eXtreme Low-Power (XLP) | eXtreme Low-Power (XLP) |
Key Differentiators
- Extended -40C to +125C temperature grade (E-temp) (vs PIC24FJ64GU205-I/M4)
- ECC Flash for long-term code reliability (vs PIC24FJ64GA705T-I/M4)
- Integrated USB 2.0 Full-Speed with on-chip transceiver (vs PIC24FJ64GA705T-I/M4)
Design Notes
The 48-pin UQFN (M4) package exposes a thermal pad on the underside that must be soldered to a continuous ground copper pour. Estimated: with a 1-inch-square ground pour on a 1-oz 4-layer PCB, theta_JA is approximately 25 C/W. The PIC24FJ64GU205-E/M4 typically dissipates 50-100 mW in active mode (USB + CPU), so junction temperature rise stays well below 10C in most designs. Failure to solder the thermal pad results in degraded USB signal integrity at elevated temperatures.
USB differential pair D+/D- (pins 41-42) must be routed as a 90-ohm differential impedance pair with length matching within 150 mil. Place a 4.7uF decoupling capacitor on VBUS (pin 43) and 100nF + 10uF bulk caps near VDD pins 5 and 32. The 48-UQFN package has 0.4 mm pin pitch; use a 4-layer PCB with microvia-in-pad if BGA-grade fan-out is needed, otherwise standard 4-mil traces with 0.8 mm pad pitch are achievable on 2-layer boards.
Estimated: Forgetting to configure the VUSB internal regulator capacitor on pin 44 results in USB enumeration failures. Per Microchip's datasheet (DS30010102E), a 1uF X7R ceramic on VUSB is mandatory. Also, the MCLR pin (45) requires a 10kohm pull-up to VDD - leaving it floating causes erratic reset behaviour. JTAG pins RB5/RB6 must be left disconnected or pulled low during normal operation to avoid conflicts with programming mode.
In deep-sleep mode the PIC24FJ64GU205-E/M4 achieves sub-microamp current with RAM retention, suitable for coin-cell battery applications. Estimated: average current at 1 Hz wake cycle for sensor sampling is approximately 5-10 uA, allowing 1000 mAh CR2032 battery life exceeding 5 years. Always enable the on-chip voltage regulator in sleep mode and disable unused peripherals via PMD bits to achieve datasheet-quoted sleep currents.
Compliance Information
RoHS and lead-free confirmed per Microchip product page. AEC-Q100 not qualified (this is industrial/consumer grade; automotive customers should review Microchip's AEC-Q100 PIC portfolio separately).
