PIC24FJ32GU202T-I/SS - 16-bit 32MHz 32KB USB MCU | Microchip
MPN: PIC24FJ32GU202T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.61 | $261.00 |
| 500 | $2.27 | $1,135.00 |
| 1,000 | $1.98 | $1,980.00 |
PIC24FJ32GU202T-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of peripheral interfaces (timers, ADC, UART, USB, I2C, SPI, GPIO). The PIC24F family sits within Microchip's 16-bit portfolio, offering higher computational throughput (up to 16 MIPS at 32 MHz) than 8-bit PIC MCUs while preserving the PIC heritage of deterministic interrupt handling and a compact instruction set. Within the broader hierarchy, the PIC24FJ32GU202 belongs to: MCU -> microcontroller -> 16-bit MCU -> PIC24F family -> PIC24FJ GP2/GU2 sub-family, with the GU2 designation specifically adding Full-Speed USB 2.0 Host/Device/OTG capability.
Key features of the PIC24FJ32GU202 include up to 64KB of ECC Flash across the family, 8KB of RAM, multiple Core Independent Peripherals (CIPs) such as configurable logic cells, multiple-output Capture/Compare/PWM, and a 10-bit ADC. The XLP technology drives sleep current down to a few hundred nanoamperes while retaining RAM contents and peripheral state, enabling battery-powered designs that can run for years on a single coin cell. The integrated USB 2.0 Full-Speed transceiver eliminates the need for an external PHY, allowing the MCU to act as a USB device, host, or On-The-Go (OTG) dual-role controller with minimal external components.
Typical applications include USB HID peripherals (keyboards, mice, game controllers), USB-to-UART bridge dongles, USB data loggers, portable medical and wellness devices, low-power sensor nodes with USB charging, and consumer accessories that require both a USB interface and long battery life. The 28-pin SSOP footprint offers enough GPIO for small user interfaces while staying within the Low Pin Count Package (LPC) family that simplifies PCB routing. When designing with this device, place a 1µF decoupling capacitor adjacent to each VDD/VSS pair, route the USB D+/D- lines as a 90-ohm differential pair, and ensure the VBUS/VUSB sense pin is properly connected to enable USB VBUS detection.
Drop-in alternatives for PIC24FJ32GU202T-I/SS — 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 PIC24FJ32GU202T-I/SS (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, ADC, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32GU202-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GU202T-I/SO
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC24FJ32GU202T-I/ML
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC24FJ32GU202-I/ML
✅ Drop-In✓ In Stock
$2.41 / Unit
View Datasheet →PIC24FJ32GU202-E/ML
✅ Drop-In✓ In Stock
$2.49 / Unit
View Datasheet →PIC24FJ64GU202-I/SS
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →PIC24FJ32GU202T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit MIPS |
| CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (11K x 24) with ECC |
| Data RAM | 8 KB |
| USB Interface | USB 2.0 Full-Speed Host/Device/OTG |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (Industrial, "I") |
| Package | 28-pin SSOP ("/SS") |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel ("T") |
| ADC | 10-bit |
| Low-Power Technology | XLP (sleep current few hundred nA) |
| Core Independent Peripherals | Yes (CIPs including CLC, MCCP) |
| RoHS Status | Compliant |
PIC24FJ32GU202T-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / analog input |
| Pin 3 | RA1 — Port A bit 1 / analog input |
| Pin 4 | RB0 — Port B bit 0 / programming PGED1 |
| Pin 5 | RB1 — Port B bit 1 / programming PGEC1 |
| Pin 6 | RB2 — Port B bit 2 / analog input |
| Pin 7 | RB3 — Port B bit 3 / analog input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Crystal oscillator input / CLKIN |
| Pin 10 | OSC2 — Crystal oscillator output / CLKOUT |
| Pin 11 | RC0 — Port C bit 0 |
| Pin 12 | RC1 — Port C bit 1 / OSC1 alt |
| Pin 13 | RC2 — Port C bit 2 / OSC2 alt |
| Pin 14 | VBUS — USB VBUS sense input |
| Pin 15 | D- — USB Full-Speed D- data line |
| Pin 16 | D+ — USB Full-Speed D+ data line |
| Pin 17 | RC3 — Port C bit 3 |
| Pin 18 | RC4 — Port C bit 4 |
| Pin 19 | RC5 — Port C bit 5 |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RB4 — Port B bit 4 |
| Pin 22 | RB5 — Port B bit 5 |
| Pin 23 | RB6 — Port B bit 6 / ICSPCLK |
| Pin 24 | RB7 — Port B bit 7 / ICSPDAT |
| Pin 25 | RA2 — Port A bit 2 |
| Pin 26 | RA3 — Port A bit 3 |
| Pin 27 | AVDD — Analog supply voltage |
| Pin 28 | VDD — Digital supply voltage |
Typical Applications
PIC24FJ32GU202T-I/SS is suitable for 6 applications: USB HID Peripherals, USB-to-UART Bridge Dongles, USB Data Loggers, Portable Medical and Wellness Devices, USB-Connected Sensor Hubs, USB Charging and Power Accessories.
USB HID Peripherals
The PIC24FJ32GU202T-I/SS's integrated Full-Speed USB 2.0 transceiver and 32 KB ECC Flash make it well-suited for USB HID peripherals such as keyboards, mice, and game controllers. The on-chip USB PHY eliminates an external component, and the 8 KB RAM comfortably holds HID report buffers plus USB stack overhead (Microchip MLA library typically <4 KB). XLP sleep currents down to a few hundred nA extend battery life on wireless HID dongles running from a coin cell. The 28-pin SSOP footprint provides sufficient GPIO for matrix-scanned keyboards (8x8) while keeping PCB size compact.
Recommended
USB-to-UART Bridge Dongles
USB-to-UART bridge dongles use the PIC24FJ32GU202T-I/SS's integrated USB device controller plus a software UART to expose a CDC-ACM virtual COM port. The 32 KB ECC Flash holds Microchip's USB CDC + UART echo firmware with margin, while XLP enables suspend-mode current of a few hundred microamperes for bus-powered designs. The 32 MHz CPU sustains 16 MIPS, sufficient for full-duplex UART operation at 921600 baud with hardware DMA. Designers route D+/D- as a 90-ohm differential pair per USB 2.0 specification.
Recommended
USB Data Loggers
Battery-powered USB data loggers benefit from the PIC24FJ32GU202T-I/SS's combination of 32 KB ECC Flash for firmware, 8 KB RAM for sample buffering, and Full-Speed USB for offload. The XLP sleep mode draws only a few hundred nA between sensor samples, allowing multi-year operation on a single CR2032 coin cell. The integrated ADC samples temperature, battery voltage, or external sensors while the MCU sleeps. USB enumeration re-enables fast bulk-mode data offload when plugged into a host.
Recommended
Portable Medical and Wellness Devices
Wearable pulse oximeters, glucose meters, and thermometer probes leverage the PIC24FJ32GU202T-I/SS's low-power operation and integrated USB for both charging and data transfer. The industrial -40 °C to +85 °C ("I") temperature grade supports clinical and home-health environments, while the ECC Flash mitigates bit-flips from ESD events common in patient-contact applications. Microchip's Class B software libraries can be ported directly to this part. The 28-pin SSOP fits thin wearable form factors (<6 mm body thickness).
Recommended
USB-Connected Sensor Hubs
Industrial and IoT sensor hubs aggregate multiple I2C/SPI sensors and expose readings over USB CDC or HID. The PIC24FJ32GU202T-I/SS's Core Independent Peripherals (CIPs) such as CLC and MCCP autonomously trigger ADC conversions and GPIO events without CPU intervention, leaving the 16 MIPS core free for USB stack and host communication. With 8 KB RAM, the part handles 4-6 simultaneous sensor streams at 100 Hz sampling rates. The 28-pin SSOP provides adequate GPIO for 4-wire SPI plus I2C plus interrupt lines.
Recommended
USB Charging and Power Accessories
Smart USB chargers, USB-PD trigger dongles, and power-bank monitoring boards use the PIC24FJ32GU202T-I/SS to monitor VBUS current, control MOSFET gates, and report status over USB. The integrated USB device interface advertises vendor-specific descriptors for host-side charger configuration. ECC Flash prevents configuration corruption in high-EMI switching environments. The XLP sleep current of a few hundred nA preserves standby power consumption when no device is attached.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32GU202T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32GU202-I/SS | PIC24FJ32GU202T-I/SO | PIC24FJ32GU202T-I/ML | PIC24FJ32GU202-I/ML | PIC24FJ32GU202-E/ML | PIC24FJ64GU202-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SSOP | 28-pin SSOP (tray) - same | 28-pin SOIC - same pinout, wider body | 28-pin QFN - same pinout, smaller PCB area | 28-pin QFN (tray) | 28-pin QFN (extended temp) | 28-pin SSOP - same |
| Flash Memory | 32 KB ECC | 32 KB ECC | 32 KB ECC | 32 KB ECC | 32 KB ECC | 32 KB ECC | 64 KB ECC |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB 2.0 | Host/Device/OTG integrated | Host/Device/OTG integrated | Host/Device/OTG integrated | Host/Device/OTG integrated | Host/Device/OTG integrated | Host/Device/OTG integrated | Host/Device/OTG integrated |
| 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 |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (Extended) | -40 °C to +85 °C |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tray | Tray | Tray |
Key Differentiators
- Integrated Full-Speed USB 2.0 PHY (vs PIC24FJ32GP202-I/SS)
- XLP extreme low-power technology (vs PIC24FJ32GA102-I/SS)
- ECC Flash memory for robust operation (vs PIC24FJ16MC101-I/SS)
Design Notes
Place a 1 µF decoupling capacitor within 3 mm of each VDD/VSS pair on the PIC24FJ32GU202T-I/SS, plus a bulk 10 µF tantalum or ceramic capacitor on the main 3.3 V rail. The MCU has two VDD/AVDD pairs (pin 27 AVDD, pin 28 VDD, and pin 8/20 VSS) per the family datasheet, all of which require local bypass. Inadequate decoupling is the most common cause of USB enumeration failures and ADC noise pickup.
Route the USB D+ (pin 16) and D- (pin 15) lines as a 90-ohm differential pair with trace lengths matched within 150 mil per USB 2.0 specification. Place the VBUS sense pin (pin 14) with a 1 µF capacitor and a 100 kΩ pull-down to ensure proper USB attach detection. Keep clock traces (OSC1/OSC2) short and guard the crystal with a ground pour to minimize EMI. Estimated from general USB hardware design guidelines - refer to Microchip AN-Harmony for definitive values.
Do not omit the MCLR pull-up resistor (typically 10 kΩ to VDD) on pin 1, or the MCU will randomly enter reset states. For ICSP programming, ensure PGEC1 (pin 5) and PGED1 (pin 4) are not pulled low at startup or the debugger will fail to attach. USB VBUS must be sensed before driving D+/D- high, otherwise the host will not enumerate the device. Estimated: based on Microchip PIC24F hardware design checklist.
Compliance Information
RoHS and lead-free compliance per Microchip product page. AEC-Q100 not applicable for this industrial-grade part; Microchip offers separate automotive-qualified variants in the PIC24F family.
