PIC24FJ64GU202-I/SS - 64KB USB MCU 16-bit 32MHz SSOP-28 | Microchip
MPN: PIC24FJ64GU202-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.52 | $2,520.00 |
PIC24FJ64GU202-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and a rich set of on-chip peripherals such as timers, ADC, communication controllers, and I/O. Within the broader taxonomy, the PIC24FJ64GU202 belongs to the 16-bit MCU class, which sits between 8-bit MCUs (PIC10/12/16) and 32-bit MCUs (PIC32/MIPS). It targets USB-connected embedded applications where deterministic interrupt response and ultra-low sleep current are required.
Key features include a 9-channel 12-bit ADC, four 16-bit timers, two UART, two SPI, two I2C, a Real-Time Clock/Calendar (RTCC) with calendar mode, and Core Independent Peripherals (CIPs) such as CLC, MCCP, and PWM. The eXtreme Low-Power design provides sleep current down to a few hundred nanoamps while retaining RAM and full register context, with wake-up times in the microsecond range. Boundary-scan support (JTAG) is included for production test.
Architecturally, the PIC24FJ64GU202 uses a 16-bit modified Harvard core with a 24-bit instruction word, a 7-stage pipeline, and hardware Multiply/Divide. The integrated USB 2.0 FS OTG controller includes an on-chip transceiver, requiring only an external bus-pull-up and the standard 48 MHz derived from the system clock. The CIPs operate without CPU intervention, reducing firmware complexity and power consumption.
Typical applications include USB Human Interface Devices (HID), USB-to-UART bridges, USB barcode scanners, USB medical sensors, USB charging controllers, and battery-powered data loggers with USB connectivity. The XLP feature set is also well-suited to wearable health and IoT edge devices that spend long periods in sleep between transactions.
When designing with this part, ensure the USB bus-power path supports the inrush and suspend current budget (USB 2.0 specifies 100 mA/500 mA in high-power and 2.5 mA in suspend). Use Microchip's MPLAB X IDE with the XC16 compiler and the MLA USB stack for rapid firmware development. Decouple VDD/VUSB per the datasheet reference layout, and consider a watchdog timer for long-run USB applications.
This page synthesizes distributor stock and pricing, drop-in compatible SSOP-28 alternatives from the PIC24FJ family, and practical design notes on USB bus-power and XLP sleep currents that go beyond the manufacturer datasheet.
Drop-in alternatives for PIC24FJ64GU202-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 PIC24FJ64GU202-I/SS (same form factor and footprint) — differing in ADC, Package, Timers, Operating Temperature, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GU202-E/SS
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC24FJ64GB202-I/SS
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC24FJ64GB202-E/SS
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →PIC24FJ64GA002-I/SS
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC24FJ48GA002-I/SS
✅ Drop-In✓ In Stock
$3.4 / Unit
View Datasheet →PIC24FJ32GA002-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GU202-I/SS Maximum Ratings & Electrical Characteristics
| Series | PIC24F |
| Core Processor | PIC |
| Core Size | 16-bit |
| Maximum Clock Speed | 32 MHz (16 MIPS) |
| Program Memory Size | 64 KB (22K x 24) Flash with ECC |
| RAM Size | 8 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| USB Controller | USB 2.0 Full-Speed Host/Device/OTG with on-chip transceiver |
| Number of I/O | 20 |
| ADC | 9-channel, 12-bit |
| Timers | 4 x 16-bit |
| Communication Interfaces | 2 x UART, 2 x SPI, 2 x I2C |
| Core Independent Peripherals (CIPs) | CLC, MCCP, PWM, RTCC, DMA |
| RTCC | Real-Time Clock/Calendar with calendar mode |
| eXtreme Low-Power (XLP) Sleep Current | Few hundred nA (RAM retained) |
| Boundary Scan | Yes (JTAG) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial, "I" grade) |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC24FJ64GU202-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset, active low); also programming voltage input |
| Pin 2 | RA0 — Port A bit 0 / analog AN0 / CVREF+ |
| Pin 3 | RA1 — Port A bit 1 / analog AN1 / CVREF- |
| Pin 4 | RB0 — Port B bit 0 / PGED1 programming data |
| Pin 5 | RB1 — Port B bit 1 / PGEC1 programming clock |
| Pin 6 | RB2 — Port B bit 2 / analog AN2 |
| Pin 7 | RB3 — Port B bit 3 / analog AN3 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA2 — Port A bit 2 / analog AN4 / VREF- |
| Pin 10 | RA3 — Port A bit 3 / analog AN5 / VREF+ |
| Pin 11 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| Pin 12 | RA4 — Port A bit 4 / analog AN6 |
| Pin 13 | OSCI — External oscillator input |
| Pin 14 | OSCO — External oscillator output |
| Pin 15 | RA5 — Port A bit 5 / analog AN7 |
| Pin 16 | RA6 — Port A bit 6 |
| Pin 17 | RA7 — Port A bit 7 |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| Pin 20 | RB4 — Port B bit 4 / SOSCO 32 kHz crystal out |
| Pin 21 | D- — USB Full-Speed D- data line |
| Pin 22 | D+ — USB Full-Speed D+ data line (with pull-up) |
| Pin 23 | RB5 — Port B bit 5 / SOSCI 32 kHz crystal in |
| Pin 24 | RB6 — Port B bit 6 / analog AN8 |
| Pin 25 | RB7 — Port B bit 7 / analog AN9 |
| Pin 26 | RB8 — Port B bit 8 |
| Pin 27 | RB9 — Port B bit 9 |
| Pin 28 | RB10 — Port B bit 10 |
Typical Applications
PIC24FJ64GU202-I/SS is suitable for 7 applications: USB Human Interface Device (HID), USB-to-UART Bridge, USB Barcode Scanner / POS Terminal, USB Battery Charger Controller, USB Wearable Health Sensor, Industrial USB Data Logger, USB IoT Edge Node.
USB Human Interface Device (HID)
The PIC24FJ64GU202-I/SS is purpose-built for USB HID peripherals such as keyboards, mice, game controllers, and presentation remotes. Its Full-Speed USB 2.0 OTG controller with on-chip transceiver eliminates external PHY cost, while the 64 KB Flash and 8 KB RAM comfortably hold HID class descriptors, modifier logic, and lighting/macro engines. The XLP sub-microamp sleep current allows coin-cell HID devices to deliver multi-year battery life; the 9-channel 12-bit ADC supports analog features such as pressure-sensitive buttons or capacitive sliders. Engineered with the 16 MIPS PIC24 core, the MCU sustains 1 ms USB polling intervals without CPU strain.
Recommended
USB-to-UART Bridge
The PIC24FJ64GU202-I/SS serves as a cost-effective USB-to-UART bridge (CDC-ACM class) for legacy RS-232 equipment retrofit, industrial consoles, and debug loggers. Two on-chip UARTs paired with USB 2.0 OTG allow simultaneous USB-UART and UART-UART pass-through or isolation. The 64 KB Flash holds the CDC class stack and buffering logic, and 8 KB RAM sustains 512-byte TX/RX FIFOs at high baud rates. The 2.0-3.6 V VDD range supports direct bus-power operation at 3.3 V logic levels, matching common UART transceivers without level shifters.
Recommended
USB Barcode Scanner / POS Terminal
The PIC24FJ64GU202-I/SS is well-matched to handheld USB barcode scanners and small point-of-sale terminals where USB connectivity, image sensor I/O, and ultra-low standby current are all required. Its 9-channel 12-bit ADC digitizes the analog front-end of CCD or CMOS imaging sensors, while 64 KB Flash and 8 KB RAM host decoding algorithms (Code-128, QR, DataMatrix). The XLP feature set holds standby current below 1 uA between scans, and the 32 MHz core sustains 50+ scans per second on QR codes.
Recommended
USB Battery Charger Controller
The PIC24FJ64GU202-I/SS implements a smart USB battery charger with USB-IF compliant BC1.2 detection, Li-ion CC-CV charge profiles, and host-port or dedicated-charger negotiation via its on-chip USB OTG controller. The 12-bit ADC monitors Vbat, Ichg, and die temperature to throttle charging. The 64 KB Flash holds BC1.2 state-machine firmware plus a user LCD/LED UI, while 8 KB RAM logs charging cycles. The XLP deep-sleep current extends shelf life when the device is disconnected.
Recommended
USB Wearable Health Sensor
The PIC24FJ64GU202-I/SS powers USB-connected wearable health devices such as pulse-oximeter dongles, single-lead ECG sticks, and foot-pod activity trackers. Its 9-channel 12-bit ADC at 200 ksps digitizes PPG/ ECG waveforms, the 2.0 V low-Vdd allows direct coin-cell operation, and the XLP sleep current below 500 nA between samples enables 30+ day battery life on a CR2032. The USB OTG link recharges the coin cell via VBUS and streams the buffered waveform data to a host PC. The RTCC timestamp aligns samples with clinical logs.
Recommended
Industrial USB Data Logger
The PIC24FJ64GU202-I/SS integrates an industrial USB data logger for process monitoring, machine telemetry, and predictive-maintenance sensor pods. Its CIPs - including CLC, MCCP, and DMA - allow glitch-free sensor acquisition without CPU load, while 64 KB Flash stores a small real-time OS and 8 KB RAM holds circular buffers between USB transactions. The -40 to +85 C industrial temperature grade supports factory-floor enclosures. The Core Independent Peripherals enable sub-millisecond deterministic response to encoder pulses.
Recommended
USB IoT Edge Node
The PIC24FJ64GU202-I/SS anchors USB-attached IoT edge nodes such as home automation bridges, Z-Wave/Zigbee USB sticks, and BLE-over-USB proxies. Its USB 2.0 OTG can host a downstream BLE module while also enumerating to the PC, enabling dual-role edge gateways. The 32 MHz core decodes common IoT protocols, 64 KB Flash holds OTA-bootloader plus application image, and the XLP sleep below 1 uA keeps standby power negligible when the host PC is off.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GU202-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GU202-E/SS | PIC24FJ64GB202-I/SS | PIC24FJ64GB202-E/SS | PIC24FJ64GA002-I/SS | PIC24FJ48GA002-I/SS | PIC24FJ32GA002-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Memory | 64 KB Flash (22K x 24) ECC | 64 KB Flash - same | 64 KB Flash - same | 64 KB Flash - same | 64 KB Flash - same | 48 KB Flash (-25%) | 32 KB Flash (-50%) |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB Peripheral | USB 2.0 FS Host/Device/OTG with on-chip transceiver | USB 2.0 FS Host/Device/OTG - same | USB 2.0 FS Device only - reduced | USB 2.0 FS Device only - reduced | No USB | No USB | No USB |
| Core Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same | 32 MHz / 16 MIPS - same |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same |
| Temperature Range | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| ADC | 9-channel 12-bit | 9-channel 12-bit - same | 9-channel 12-bit - same | 9-channel 12-bit - same | 10-channel 12-bit | 10-channel 12-bit | 10-channel 12-bit |
| Approx. Unit Price (qty 1) | $4.20 | $4.50 | $3.85 | $4.10 | $3.30 | $3.10 | $2.95 |
Key Differentiators
- USB OTG Host/Device/OTG with on-chip transceiver (vs Device-only on GB202) (vs PIC24FJ64GB202-I/SS)
- eXtreme Low-Power (XLP) sub-microamp sleep current (vs PIC24FJ64GB202-I/SS)
- 64 KB Flash with ECC for safety and long-life USB devices (vs PIC24FJ32GA002-I/SS)
Design Notes
USB bus-power designs must comply with USB 2.0 inrush and suspend current budgets. The PIC24FJ64GU202's suspend current must drop below 2.5 mA within 10 ms of USB suspend; enable the on-chip XLP sleep mode and gate peripheral clocks before issuing the suspend ACK. Place a 4.7 uF bulk capacitor on VBUS and a 1 uF + 0.1 uF decoupling pair on each VDD pin to absorb hot-plug transients. Reference Microchip AN1420 (USB Embedded Host Stack) for bus-power examples.
The 28-SSOP package has a 0.65 mm pin pitch requiring narrow PCB traces. Route the USB D+/D- differential pair as a 90-ohm impedance-controlled trace with length matching within 2 mm, and keep them away from switching converters. Use a ground pour under the SSOP body, and tie the exposed center pad (where present) to ground to reduce EMI. Decouple each VDD pin within 2 mm of the package lead.
The 32 MHz system oscillator drives the USB 48 MHz PLL; the accuracy requirement for Full-Speed USB is +/- 0.25% (12,000 ppm), so a high-quality 8 MHz or 12 MHz crystal is required. Avoid ceramic resonators for USB designs - their ppm drift violates USB compliance and causes enumeration failures. Add a 1 MOhm parallel resistor across the crystal to bias it into the linear region, per the PIC24F oscillator reference design.
Do not omit the 10 kOhm pull-up on D+ when the device is USB Device; without it the host will not detect connection. The MCLR pin must have a 10 kOhm pull-up to VDD; leaving MCLR floating causes unreliable resets. Always configure the JTAGEN fuse appropriately - boundary-scan can inadvertently drive the I/O pins if enabled in production firmware. Use the Configuration bits set in MPLAB X IDE / XC16 to lock the part against accidental rewrite in the field.
Compliance Information
Microchip product page lists RoHS compliant, REACH compliant, lead-free matte-tin finish. MSL-1 (unlimited floor life). Not AEC-Q100 qualified - choose PIC24FJ64GAxxx-E grade for extended industrial temperature.
