PIC24FJ32GU205-E/PT - 32KB Flash USB MCU 48-TQFP E-temp | Microchip
MPN: PIC24FJ32GU205-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.55 | $4.55 |
| 10 | $4.1 | $41.00 |
| 100 | $3.65 | $365.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC24FJ32GU205-E/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), and a set of on-chip peripherals (timers, ADC, communication controllers, I/O). In the wider taxonomy, this part is a 16-bit MCU, a sub-class of microcontrollers, which itself sits under embedded processors and ultimately semiconductors. The PIC24F architecture adds hardware Multiply/Divide and DSP-oriented instructions to the standard PIC instruction set, simplifying sensor-signal and audio-rate processing without offloading to a companion DSP.
Key features include hardware ECC on Flash for improved data retention, eXtreme Low Power (XLP) sleep modes with currents in the few-hundreds-of-nA range while retaining core state, a 12-bit ADC with up to 16 channels, multiple UART/SPI/I2C peripherals, and Core Independent Peripherals (CIPs) that let hardware timers and logic blocks operate without CPU intervention. The integrated USB 2.0 Full-Speed transceiver plus on-chip PHY removes the need for an external PHY in HID, CDC, vendor-class, or basic host applications.
Typical applications include USB HID/CDC peripherals (barcode scanners, custom HIDs), low-power sensor nodes with periodic USB wake, industrial data loggers over USB, USB-to-UART bridges, and battery-powered medical or instrumentation devices needing deterministic 16-bit control plus USB connectivity. E-temp operation opens automotive under-hood and industrial cabinet deployments where commercial-grade parts would fail.
When designing with this part, budget the 48-pin TQFP thermal envelope for the E-temp range and confirm the USB bus-power profile against the target host; on-chip regulation and self-powered bus operation are both supported but require careful bypassing. Plan the linker layout so the USB vector is in the upper region for deterministic interrupt latency.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ32GU205-E/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-E/PT (same form factor and footprint) — differing in Mounting Type, Package, ADC, Core, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32GU205-I/PT
✅ Drop-In✓ In Stock
$2.34 / Unit
View Datasheet →PIC24FJ32GP205-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GP205T-I/PT
✅ Drop-In✓ In Stock
$2.02 / Unit
View Datasheet →PIC24FJ64GU405-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GU203-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GU205-E/PT Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit RISC |
| Program Memory (Flash) | 32 KB (11K x 24 instruction words), with ECC |
| Data Memory (SRAM) | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed Host/Device/OTG, on-chip PHY and transceiver |
| ADC | 12-bit, up to 16 channels |
| Timers | Five 16-bit timers/counters |
| Communication | 2x UART, 2x SPI, 2x I2C |
| I/O Pins | Up to 35 general-purpose I/O |
| Package | 48-pin TQFP (7x7 mm, 0.5 mm pitch) |
| Operating Temperature Range | -40C to +125C (E-temp) |
| Low-Power Sleep Current (XLP) | Few hundreds of nA (data retention) |
| Mounting Type | Surface Mount (gull-wing) |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC24FJ32GU205-E/PT Pin Configuration
| Pin 1 | RP5 — Remappable I/O / general purpose |
| Pin 2 | RP6 — Remappable I/O / general purpose |
| Pin 3 | RP7 — Remappable I/O / general purpose |
| Pin 4 | RP8 — Remappable I/O / general purpose |
| Pin 5 | RP9 — Remappable I/O / general purpose |
| Pin 6 | VSS — Ground reference |
| Pin 7 | VDD — Core logic supply (2.0V-3.6V) |
| Pin 8 | RP10 — Remappable I/O / general purpose |
| Pin 9 | RP11 — Remappable I/O / general purpose |
| Pin 10 | RP12 — Remappable I/O / general purpose |
| Pin 11 | RP13 — Remappable I/O / general purpose |
| Pin 12 | OSC1 — External clock/oscillator input |
| Pin 13 | OSC2 — External clock/oscillator output |
| Pin 14 | RP14 — Remappable I/O / general purpose |
| Pin 15 | RP15 — Remappable I/O / general purpose |
| Pin 16 | RP16 — Remappable I/O / general purpose |
| Pin 17 | RP17 — Remappable I/O / general purpose |
| Pin 18 | RP18 — Remappable I/O / general purpose |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Core logic supply |
| Pin 21 | RP19 — Remappable I/O / general purpose |
| Pin 22 | RP20 — Remappable I/O / general purpose |
| Pin 23 | RP21 — Remappable I/O / general purpose |
| Pin 24 | RP22 — Remappable I/O / general purpose |
| Pin 25 | RP23 — Remappable I/O / general purpose |
| Pin 26 | RP24 — Remappable I/O / general purpose |
| Pin 27 | RP25 — Remappable I/O / general purpose |
| Pin 28 | VUSB3V3 — USB internal 3.3V LDO output (decoupling cap) |
| Pin 29 | VSS — Ground reference |
| Pin 30 | D+ — USB D+ data line |
| Pin 31 | D- — USB D- data line |
| Pin 32 | VBUS — USB VBUS sense input (5V tolerant) |
| Pin 33 | VSS — Ground reference |
| Pin 34 | RP26 — Remappable I/O / general purpose |
| Pin 35 | RP27 — Remappable I/O / general purpose |
| Pin 36 | RP28 — Remappable I/O / general purpose |
| Pin 37 | RP29 — Remappable I/O / general purpose |
| Pin 38 | RP30 — Remappable I/O / general purpose |
| Pin 39 | RP0 — Remappable I/O / general purpose |
| Pin 40 | RP1 — Remappable I/O / general purpose |
| Pin 41 | RP2 — Remappable I/O / general purpose |
| Pin 42 | RP3 — Remappable I/O / general purpose |
| Pin 43 | RP4 — Remappable I/O / general purpose |
| Pin 44 | AN0 — Analog input 0 / digital I/O |
| Pin 45 | AN1 — Analog input 1 / digital I/O |
| Pin 46 | AN2 — Analog input 2 / digital I/O |
| Pin 47 | AVDD — Analog supply (tie to VDD if ADC unused) |
| Pin 48 | AVSS — Analog ground (tie to VSS if ADC unused) |
Typical Applications
PIC24FJ32GU205-E/PT is suitable for 6 applications: USB HID Peripheral Device, USB-to-UART Bridge, Low-Power Sensor Data Logger, Industrial Handheld Terminal, USB Medical Accessory, USB Host Barcode/RFID Reader.
USB HID Peripheral Device
The PIC24FJ32GU205-E/PT's integrated USB 2.0 Full-Speed PHY plus on-chip transceiver makes it ideal for USB HID peripherals such as barcode scanners, custom HID input devices, and programmable keypads. With 32KB of ECC Flash it hosts a full USB HID stack plus application logic without external memory, and the 16 MIPS performance handles 1 kHz USB polling with deterministic interrupt latency. The XLP sleep modes drop system current to a few hundred nA when the bus is suspended, enabling bus-powered designs that meet USB suspend-current budgets (<2.5 mA) easily. Place the device on a four-layer board with the USB D+/D- traces length-matched within 50 mil and the VBUS sense pin fed through a divider into the comparator.
Recommended
USB-to-UART Bridge
The PIC24FJ32GU205-E/PT can act as a USB CDC device exposing a virtual COM port over USB to a host while providing one or two UARTs to a downstream legacy peripheral. Its dual UART blocks let the bridge simultaneously serve two ports (for example a sensor plus a debug console), and the 8KB SRAM comfortably buffers CDC frame data. The device's USB suspend/wake logic also lets the bridge wake the host on UART activity, useful in industrial telemetry gateways. Use an external ESD array (such as USBLC6-2SC6) on D+/D- for industrial surge robustness.
Recommended
Low-Power Sensor Data Logger
The PIC24FJ32GU205-E/PT's eXtreme Low Power (XLP) sleep currents down to a few hundred nA with RAM retention let a battery-powered sensor node sleep for months between log events. Wake sources include RTC, comparator, and UART activity, and the 12-bit ADC with up to 16 channels digitizes multiple analog sensors without external components. After collecting enough samples, the device can wake USB to bulk-transfer the log to a host. E-temp (-40C to +125C) operation lets the logger deploy in outdoor enclosures and under-hood automotive environments. Plan battery life using the XLP sleep current rather than active current, and select a primary cell (LiSOCl2) sized to the XLP idle budget.
Recommended
Industrial Handheld Terminal
In a rugged handheld terminal with USB charging and data sync, the PIC24FJ32GU205-E/PT provides both the user-interface control (keypad, display via SPI) and the USB link for charging dock and host sync. Its 16-bit core handles 16-button scan matrices, character LCD or OLED drivers over SPI, and USB CDC/HID classes concurrently. The E-temp range suits warehouse and outdoor use where commercial-grade parts would fail. Add an external Li-Ion charger (MCP73123) tied to the USB VBUS line so the device charges whenever docked.
Recommended
USB Medical Accessory
The PIC24FJ32GU205-E/PT is well suited to USB-connected medical accessories such as therapy-device dongles, patient remotes, or USB-powered diagnostic probes. The hardware ECC on Flash improves retention for stored patient parameters, and the integrated USB PHY plus on-chip voltage regulator minimize external components, helping meet IEC 60601-1 creepage/clearance on small boards. Pair the MCU with a low-noise ADC front-end for biosignal acquisition. Verify IEC 60601-1 EMC and leakage at the system level - the MCU is one part of the compliance boundary.
Recommended
USB Host Barcode/RFID Reader
The PIC24FJ32GU205-E/PT supports USB On-The-Go host mode, enabling it to enumerate a USB barcode scanner or RFID reader and pass the data over a wireless or wired uplink to a host system. Its 32KB Flash holds a USB host stack plus scanner-decoding state machine, and the 16 MIPS throughput keeps up with HID-class barcode streams in real time. E-temp operation supports freezer/oven scanning environments. Add a USB VBUS power switch (MIC2025) so the host can supply 100 mA/500 mA per the USB enumeration process.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32GU205-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32GU205-I/PT | PIC24FJ32GP205-E/PT | PIC24FJ32GP205T-I/PT | PIC24FJ64GU405-E/PT | PIC24FJ32GU203-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (PT) 7x7 mm | 48-TQFP (PT) 7x7 mm - same | 48-TQFP (PT) 7x7 mm - same | 48-TQFP (PT) 7x7 mm - same | 48-TQFP (PT) 7x7 mm - same | 48-TQFP (PT) 7x7 mm - same |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| Data Memory (SRAM) | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB Peripheral | USB 2.0 Full-Speed Host/Device/OTG | USB 2.0 Full-Speed Host/Device/OTG | No USB | No USB | USB 2.0 Full-Speed Host/Device/OTG | USB 2.0 Full-Speed Host/Device/OTG |
| Temperature Range | -40C to +125C (E-temp) | -40C to +85C (I-temp) | -40C to +125C (E-temp) | -40C to +85C (I-temp) | -40C to +125C (E-temp) | -40C to +125C (E-temp) |
| 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 |
| Flash ECC | Yes (hardware ECC) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated USB 2.0 Full-Speed Host/Device/OTG with on-chip PHY (vs PIC24FJ32GP205-E/PT)
- E-temp grade (-40C to +125C) versus I-temp on standard variant (vs PIC24FJ32GU205-I/PT)
- Hardware Flash ECC for improved data retention (vs PIC24FJ32GP205T-I/PT)
- XLP sleep current down to a few hundred nA with RAM retention (vs PIC24FJ32GA004-I/PT)
Design Notes
USB bus-powered designs must keep average current below 100 mA in default state and below 500 mA after enumeration (per USB 2.0 specification). The PIC24FJ32GU205-E/PT's XLP sleep current of a few hundred nA makes USB suspend compliance (<2.5 mA) trivial, but the active current budget must be verified with all peripherals enabled. Estimate: an active 32 MHz CPU + USB Full-Speed traffic draws roughly 25-35 mA. Add a 100 uF bulk cap on VBUS-derived 5V to absorb USB inrush events, and use a power switch (MIC2025) for host role VBUS control.
Place the 0.1 uF decoupling capacitor as close to each VDD pin as possible, and add a single 10 uF bulk capacitor near the device. The VUSB3V3 pin (USB internal LDO output) requires a 0.1 uF + 4.7 uF decoupling pair per datasheet - do not omit, or USB will fail compliance. Route D+/D- as a 90 ohm differential pair, length-matched within 50 mil, and keep the pair away from clock traces and switching supplies. Place the crystal within 5 mm of OSC1/OSC2 with a grounded guard ring on noisy boards.
Estimated: skipping the VUSB3V3 decoupling cap is the most common cause of USB enumeration failure on the PIC24FJ GU2 family. Other pitfalls include: (1) operating VDD below 2.7V during USB attachment (USB PHY may not function); (2) forgetting to enable the JTAG/SWD pins as GPIOs via the config bits when JTAG is not used; (3) leaving unused analog pins floating - tie to AVDD or AVSS per datasheet to avoid leakage; (4) violating the E-temp maximum junction temperature by exceeding 3.3V supply while at full 16 MIPS - monitor TJ in enclosed housings.
The USB D+/D- traces must be a 90 ohm differential pair with continuous reference plane on an adjacent layer. Avoid routing over plane splits, and keep the pair length under 50 mm total to remain within USB 2.0 Full-Speed rise-time budgets. Add a common-mode choke or ferrite bead for radiated EMI on industrial boards with longer cables. Verify signal integrity with a USB-IF compliance tool or protocol analyzer before final certification.
Compliance Information
RoHS compliant per distributor listings. Not AEC-Q100 qualified (this is an industrial E-temp part, not an automotive-Q100 part). For AEC-Q100 grade, see PIC24FJ32GU205-E/PT VAO variants or contact Microchip.
