PIC24FJ64GU202T-I/SS - 16-bit 32MHz USB MCU 64KB Flash | Microchip
MPN: PIC24FJ64GU202T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.42 | $4.42 |
| 10 | $3.94 | $39.40 |
| 100 | $3.36 | $336.00 |
| 500 | $2.92 | $1,460.00 |
| 1,000 | $2.59 | $2,590.00 |
PIC24FJ64GU202T-I/SS Overview
A 16-bit microcontroller (MCU) is a microprocessor core with a 16-bit data path, embedded Flash program memory, RAM, and on-chip peripherals such as timers, ADC, communication controllers and interrupt logic. The PIC24F sits in the hierarchy: 16-bit MCU -> flash microcontroller -> embedded controller -> semiconductor. The PIC24FJ64GU202T-I/SS belongs to the PIC24F family that uses a modified Harvard architecture with a 24-bit instruction word and 16-bit data path, allowing single-cycle 16x16-bit multiply operations and a C-friendly runtime model.
Key features of this device include 64 KB (22K x 24) self-programmable Flash with error-correcting code, 8 KB SRAM, an integrated USB 2.0 Full-Speed On-The-Go transceiver, multiple UART/SPI/I2C peripherals, a 10-bit 1.1 Msps ADC, and the eXtreme Low Power (XLP) sleep architecture with retention. The 28-SSOP package exposes the USB D+/D- pins, two 16-bit timers, five 16-bit timers/counters, and up to 25 general-purpose I/O depending on remap configuration.
The CPU runs at 32 MHz with a 4-cycle pipeline, providing 16 MIPS throughput, while the Flash controller supports live updates via dual-partition Flash and ECC single-error correction/double-error detection. The CIP block includes configurable logic cells, a 32-bit CRC, and a hardware AES engine in higher family members; this variant focuses on USB + XLP + ADC for low-pin-count designs.
Typical applications include low-pin-count USB peripherals (HID, CDC, custom class), wearable health sensors, IoT edge nodes, industrial data loggers, and battery-powered instrumentation. The XLP sleep currents below 500 nA (RAM retention) make it well suited to coin-cell devices.
Designers should provide a stable 3.3 V rail, route the USB D+/D- pair as a 90 ohm differential, and reserve an ICP/ICD pin header for in-circuit programming. The T suffix indicates Tape-and-Reel, the I indicates the industrial -40C to +85C temperature range, and the /SS suffix identifies the 28-SSOP package. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ64GU202T-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 PIC24FJ64GU202T-I/SS (same form factor and footprint) — differing in ADC, Timers, Operating Temperature, Package, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GU202-I/SS
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →PIC24FJ64GU202T-I/SO
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC24FJ64GP202T-I/SS
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC24FJ64GU202-E/SS
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC24FJ64GA002-I/SS
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC24FJ32GU202T-I/ML
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC24FJ64GU202T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Frequency | 32 MHz |
| Performance | 16 MIPS |
| Program Memory (Flash) | 64 KB (22K x 24 instruction words) |
| SRAM | 8 KB |
| USB | USB 2.0 Full-Speed Host/Device/OTG |
| Operating Voltage | 2.0 V to 3.6 V |
| ADC | 10-bit, up to ~1.1 Msps |
| Timers | Multiple 16-bit timers/counters |
| Communication | UART, SPI, I2C |
| Low Power | XLP sleep < 500 nA RAM retention |
| Flash ECC | Single-error correction / double-error detection |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial, I grade) |
| RoHS Status | Compliant |
| Programming | ICSP / ICD via PGEDx/PGECx pins |
PIC24FJ64GU202T-I/SS Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog input / ICD data |
| Pin 2 | RA1 — Port A bit 1 / analog input / ICD clock |
| Pin 3 | RB0 — Port B bit 0 / analog input |
| Pin 4 | RB1 — Port B bit 1 / analog input |
| Pin 5 | RB2 — Port B bit 2 / analog input |
| Pin 6 | RB3 — Port B bit 3 / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RC0 — Port C bit 0 / general purpose I/O |
| Pin 9 | RC1 — Port C bit 1 / general purpose I/O |
| Pin 10 | RC2 — Port C bit 2 / general purpose I/O |
| Pin 11 | RC3 — Port C bit 3 / general purpose I/O |
| Pin 12 | RC4 — Port C bit 4 / general purpose I/O |
| Pin 13 | VDD — Positive supply (2.0 V to 3.6 V) |
| Pin 14 | RA2 — Port A bit 2 / alternate function |
| Pin 15 | RA3 — Port A bit 3 / alternate function |
| Pin 16 | RA4 — Port A bit 4 / alternate function |
| Pin 17 | RA5 — Port A bit 5 / alternate function |
| Pin 18 | RA6 — Port A bit 6 / alternate function |
| Pin 19 | RA7 — Port A bit 7 / alternate function |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RB4 — Port B bit 4 / SDA1 |
| Pin 22 | RB5 — Port B bit 5 / SCL1 |
| Pin 23 | RB6 — Port B bit 6 / ICSPCLK |
| Pin 24 | RB7 — Port B bit 7 / ICSPDAT |
| Pin 25 | RC5 — Port C bit 5 / general purpose I/O |
| Pin 26 | RC6 — Port C bit 6 / general purpose I/O |
| Pin 27 | RC7 — Port C bit 7 / general purpose I/O |
| Pin 28 | VDD — Positive supply (2.0 V to 3.6 V) |
Typical Applications
PIC24FJ64GU202T-I/SS is suitable for 6 applications: USB HID Peripheral (Keyboard / Mouse / Custom HID), Wearable Health & Fitness Sensor, Industrial Data Logger / Sensor Hub, IoT Edge Node with USB Provisioning, Battery-Powered Instrumentation, USB-to-UART / USB-to-SPI Bridge Device.
USB HID Peripheral (Keyboard / Mouse / Custom HID)
The PIC24FJ64GU202T-I/SS fits USB HID designs because the integrated USB 2.0 Full-Speed OTG transceiver eliminates an external PHY and the XLP sleep mode (sub-500 nA with RAM retention) allows battery-powered HID devices to idle for months. With 16 MIPS throughput and 64 KB Flash, the MCU comfortably runs Microchip's MLA USB stack with room for application-specific HID report descriptors and CPI logic. Placed on a small PCB with a USB-C or micro-B connector and ESD array, this part delivers a compact, low-power HID peripheral without external USB components.
Recommended
Wearable Health & Fitness Sensor
For wearable designs the PIC24FJ64GU202T-I/SS delivers <500 nA sleep current while retaining 8 KB SRAM, enabling always-on sensor sampling at coin-cell energy budgets. The 10-bit ADC and I2C/SPI peripherals connect directly to optical heart-rate, temperature, and motion sensors, while 16 MIPS handles on-device filtering and BLE-beacon-like timing. The 28-SSOP package (5.30 mm body) fits compact wristband PCBs. Designers should route the USB pins to a debug cradle rather than wear-facing connector for size optimization.
Recommended
Industrial Data Logger / Sensor Hub
The PIC24FJ64GU202T-I/SS suits industrial sensor hubs because its industrial -40C to +85C range, 64 KB ECC Flash with error correction, and 10-bit ADC allow reliable long-term logging in factory environments. The USB OTG enables direct file extraction to a USB stick without an external bridge chip, while the CIP block handles deterministic sensor sampling without CPU load. With 8 KB SRAM, the MCU buffers moderate sample bursts before USB bulk transfer. Designers should add a TVS on VDD for surge protection on industrial 24 V-derived rails.
Recommended
IoT Edge Node with USB Provisioning
For IoT edge nodes the PIC24FJ64GU202T-I/SS provides USB for in-field provisioning, firmware update via USB mass storage class, and direct host communication with a phone or PC. The XLP architecture lets the node sleep below 500 nA between sensor reports while RAM retention preserves the network state. With 16 MIPS it handles lightweight MQTT-SN or proprietary RF-baseband control via SPI. The 28-SSOP footprint allows compact node PCBs that pair with wireless modules like Sub-GHz or LoRa transceivers.
Recommended
Battery-Powered Instrumentation
The PIC24FJ64GU202T-I/SS serves battery-powered instruments by combining USB (for charging/data export), a fast 10-bit ADC for measurement, and XLP sleep below 500 nA that stretches battery life to months. With 8 KB RAM and 64 KB Flash, the MCU runs calibration tables, linearization routines, and USB CDC virtual COM port firmware without external memory. Placed between a Li-ion cell and the measurement front-end, this part keeps the system idle-friendly while supporting instant USB tethering for field debugging.
Recommended
USB-to-UART / USB-to-SPI Bridge Device
The PIC24FJ64GU202T-I/SS is a natural fit for USB-to-UART or USB-to-SPI bridges because the integrated USB OTG replaces an external bridge chip (FTDI/MCP2221) and the multiple UART/SPI/I2C peripherals can be exposed as CDC or vendor-class endpoints. With 16 MIPS it handles protocol translation in real time without bottlenecks. The 28-SSOP package fits into a USB dongle form factor. Designers should add proper ESD protection on D+/D- lines and ensure the host enumerates within USB spec timing.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GU202T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GU202-I/SS | PIC24FJ64GU202T-I/SO | PIC24FJ64GP202T-I/SS | PIC24FJ64GU202-E/SS | PIC24FJ64GA002-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP (same) | 28-SOIC | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC24F 16-bit 32 MHz | PIC24F 16-bit 32 MHz | PIC24F 16-bit 32 MHz | PIC24F 16-bit 32 MHz | PIC24F 16-bit 32 MHz | PIC24F 16-bit 32 MHz |
| Flash | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB (GP variant) | USB 2.0 FS OTG | No USB (GA variant) |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E grade) | -40C to +85C |
| XLP Sleep Current | <500 nA RAM retention | <500 nA | <500 nA | <500 nA | <500 nA | <500 nA |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG without external PHY (vs PIC24FJ64GP202T-I/SS)
- Extended temperature grade variant available in same footprint (vs PIC24FJ64GU202-E/SS)
- Lower power sleep current with RAM retention vs older PIC24F families (vs PIC24FJ64GA002-I/SS)
Design Notes
Estimated: at 32 MHz active and 3.3 V supply, core current is roughly 15 mA typical for the PIC24FJ GU2 family. For USB suspend compliance, the total system current must drop below 500 uA within 10 ms of USB suspend signalling - leverage the XLP sleep with peripherals off and RAM retention to meet this. Decouple VDD with 100 nF and 10 uF ceramic placed within 5 mm of the package pins; place a ferrite bead on the USB VBUS line to suppress upstream noise.
Route the USB D+/D- pair as a 90 ohm differential with matched length and continuous ground reference underneath. Place the ESD protection array (USBLC6-2SC6 or equivalent) within 5 mm of the USB connector, with short stubs to the MCU pins. Keep the ICSP header accessible (PGED1/PGEC1 on RB6/RB7 in this package) for in-circuit programming and debugging - do not route high-speed signals across these pins.
Do not exceed 3.6 V on any pin - the PIC24FJ is a 3.3 V part and 5 V tolerance is not guaranteed, which trips up designers migrating from PIC18F 5V-tolerant pins. Ensure the USB voltage regulator starts cleanly within 100 ms of VDD; a soft-start ramp can confuse the USB peripheral's PLL. Always connect both VDD pins (13 and 28) and both VSS pins (7 and 20) for proper current return, especially when USB is active at Full-Speed.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. AEC-Q100 not applicable - industrial grade only; automotive applications require PIC24FJ VA suffix variants. Lead-free (Pb-free) reflow profile per JEDEC J-STD-020.
