PIC24FJ64GU202-I/ML - 64KB Flash USB MCU, 28-QFN | Microchip
MPN: PIC24FJ64GU202-I/ML ✓ 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/ML Overview
A 16-bit microcontroller is a CPU with a 16-bit data path and instruction set, sitting in the hierarchy above 8-bit MCUs and below 32-bit ARM Cortex-M parts. The PIC24F family uses a modified Harvard architecture with 16-bit instructions and 24-bit addressing, optimized for deterministic real-time control with low power consumption. Compared with 8-bit PIC MCUs, the PIC24F delivers higher throughput (16 MIPS) and larger address space (up to 64KB Flash and 8KB RAM here), while keeping the simple peripheral integration of the PIC ecosystem.
Key differentiating features of the PIC24FJ64GU202 include hardware ECC on Flash for improved reliability, integrated USB 2.0 Full Speed On-The-Go (rare in low-power MCUs), and sub-uA sleep currents with retention (down to a few hundred nA according to the Microchip product page). The device also supports eXtreme Low Power modes including deep sleep, sleep, idle, and dozing, plus peripheral module disable to gate unused blocks.
Typical applications include battery-powered IoT sensor nodes, USB peripherals (HID, CDC, composite devices), wearable health devices, remote controls, low-cost instrumentation, and consumer electronics with USB charging. The integrated USB OTG eliminates the need for an external PHY, simplifying BOM for low-volume designs.
When designing with this device, allocate a generous copper pour under the exposed pad for thermal dissipation and use a 4-layer PCB if USB signal integrity is critical. The internal 8 MHz FRC oscillator with PLL allows operation without an external crystal, but USB requires the more accurate 48 MHz clock domain from PLL.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ64GU202-I/ML — 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/ML (same form factor and footprint) — differing in ADC, Package, Core Architecture, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GU202-I/M5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ32GU202-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.41 / Unit
View Datasheet →PIC24FJ64GA002-I/ML
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC24FJ64GU202-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 64 KB (22K x 24) with ECC |
| RAM | 8 KB |
| USB | USB 2.0 Full Speed Host/Device/OTG |
| ADC | 12-bit, 9 channels |
| Supply Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin QFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Timers | Multiple 16-bit (CIPs) |
| Comparators | Yes (CIP) |
| RTCC | Yes |
| RoHS Status | Compliant |
| AEC-Q100 | not_qualified |
PIC24FJ64GU202-I/ML Pin Configuration
| Pin 1 | RA0 — I/O / analog |
| Pin 2 | RA1 — I/O / analog |
| Pin 3 | RA2 — I/O / analog |
| Pin 4 | RA3 — I/O / analog |
| Pin 5 | RA4 — I/O / analog |
| Pin 6 | RA5 — I/O / analog |
| Pin 7 | VSS — Ground |
| Pin 8 | RB0 — I/O / programming |
| Pin 9 | RB1 — I/O |
| Pin 10 | RB2 — I/O |
| Pin 11 | RB3 — I/O |
| Pin 12 | RB4 — I/O / SDA |
| Pin 13 | VSS — Ground |
| Pin 14 | VDD — Supply voltage |
| Pin 15 | RB5 — I/O / SCL |
| Pin 16 | RB6 — I/O / PGC |
| Pin 17 | RB7 — I/O / PGD |
| Pin 18 | RC0 — I/O |
| Pin 19 | RC1 — I/O |
| Pin 20 | RC2 — I/O |
| Pin 21 | RC3 — I/O |
| Pin 22 | RC4 — I/O / USB D- |
| Pin 23 | RC5 — I/O / USB D+ |
| Pin 24 | RC6 — I/O |
| Pin 25 | RC7 — I/O |
| Pin 26 | MCLR — Master clear / reset |
| Pin 27 | VSS — Ground |
| Pin 28 | VDD — Supply voltage |
Typical Applications
PIC24FJ64GU202-I/ML is suitable for 6 applications: USB HID Peripheral Devices, Battery-Powered IoT Sensor Nodes, Wearable Health Devices, USB Charging and Power Banks, Remote Controls and Consumer IR Devices, Industrial Control and Sensor Hubs.
USB HID Peripheral Devices
The PIC24FJ64GU202's integrated Full Speed USB 2.0 with internal pull-up resistor makes it ideal for USB HID peripherals such as keyboards, mice, custom input devices, and game controllers. Its 64KB ECC Flash accommodates USB HID report descriptors, multi-layer keymaps, and CDC stacks. According to the Microchip product page, the USB module supports both Device and Host modes plus On-The-Go, allowing the device to enumerate as either a peripheral or a host. Sleep currents down to a few hundred nA permit battery-powered HID devices with multi-year coin-cell life. Use the on-chip RTCC to wake the MCU on a button event or scheduled interval.
Recommended
Battery-Powered IoT Sensor Nodes
With eXtreme Low Power technology delivering sleep currents down to a few hundred nA while retaining 8KB RAM, the PIC24FJ64GU202 is well suited for battery-powered IoT sensor nodes. The integrated 12-bit ADC with 9 channels can directly read temperature, humidity, voltage, and current sensors without external analog components. Core Independent Peripherals (CIPs) allow sensor scanning, threshold detection, and event counting without CPU wake-up, dramatically reducing average power. According to the Microchip product page, peripheral module disable (PMD) gates unused blocks to near-zero quiescent current. Pair with a low-power radio on SPI or I2C for periodic data uplink over multi-year battery life.
Recommended
Wearable Health Devices
The PIC24FJ64GU202's XLP sleep currents, integrated 12-bit ADC for biosensors (heart rate, SpO2, body temperature via thermistor), and USB OTG for charging/data make it a strong fit for wearable health devices such as fitness bands, smartwatches, and medical patches. The 32 MHz/16 MIPS core handles real-time bio-signal processing (R-R interval detection, step counting) while deep sleep preserves battery life between samples. According to Microchip documentation, the RTCC can wake the MCU at scheduled sample intervals. The 28-QFN 6x6 mm package is suitable for compact wearable form factors.
Recommended
USB Charging and Power Banks
USB OTG capability plus integrated comparators and PWM make the PIC24FJ64GU202 a fit for USB charging controllers and portable power banks. The MCU can negotiate USB BC 1.2 charging modes, monitor battery voltage/current via ADC, and drive status LEDs via PWM. 64KB Flash holds charging profiles, protection algorithms, and OLED UI state machines. According to the Microchip product page, the device operates from 2.0-3.6V directly compatible with single-cell Li-ion batteries. Integrated RTCC enables timed charging cutoffs without external timer ICs.
Recommended
Remote Controls and Consumer IR Devices
With up to 16 MIPS throughput, configurable logic cells, multiple PWM channels, and XLP sleep currents, the PIC24FJ64GU202 fits universal remote controls and consumer IR products. Core Independent Peripherals (CIPs) can generate IR carrier frequencies and decode RC5/RC6/SIRC protocols without CPU intervention, freeing the core for higher-layer functions. The 28-QFN 6x6 mm package supports compact remote form factors, while USB OTG enables firmware updates over USB from a host PC or service tool.
Recommended
Industrial Control and Sensor Hubs
The PIC24FJ64GU202's wide -40C to +85C industrial temperature range, hardware ECC Flash, RTCC for time-stamped logging, and 12-bit ADC make it suitable for industrial sensor hubs and control modules. Multiple UART/SPI/I2C interfaces support sensor aggregation and Modbus/CAN bridging. According to the Microchip product page, the CIP blocks can perform scheduled sensor reads, threshold compares, and fault counters autonomously, offloading the CPU for higher-layer supervisory tasks.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GU202-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GU202-I/M5 | PIC24FJ32GU202-I/ML | PIC24FJ64GA002-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6 mm) | 28-QFN (same family) | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Flash | 64 KB ECC | 64 KB ECC | 32 KB ECC (-50%) | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| USB | Full Speed Host/Device/OTG | Full Speed Host/Device/OTG | Full Speed Host/Device/OTG | None |
| ADC | 12-bit, 9 channels | 12-bit, 9 channels | 12-bit, 9 channels | 10-bit, 16 channels |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
Key Differentiators
- Integrated USB 2.0 FS Host/Device/OTG with internal pull-up (vs PIC24FJ64GA002-I/ML)
- Double the Flash of the lower-memory sibling (vs PIC24FJ32GU202-I/ML)
- XLP technology with sub-uA sleep retention (vs PIC24FJ64GB002-I/SO)
Design Notes
Estimated: at 32 MHz / 3.3 V in active mode, the PIC24FJ64GU202 draws roughly 15 mA active current. In deep sleep with RTCC and RAM retention, current drops to a few hundred nA per the Microchip product page. Enable peripheral module disable (PMD) on any unused peripheral block to minimize leakage. Place a 100 nF decoupling capacitor on each VDD pin (1, 14, 28) within 3 mm of the pad, plus a bulk 4.7 uF tantalum near the package for transient load events.
The 28-QFN exposed thermal pad must be soldered to a continuous ground copper pour with at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch) connecting to internal ground planes. This grounds pin 29 EP and provides thermal dissipation. Keep USB D+/D- traces (pins 23/22) as short as matched-length differential pair (90 ohm impedance) with no splits in the ground plane beneath them to maintain USB signal integrity.
Do not omit the 4.7 kohm pull-up on the D+ line for USB device mode - the PIC24FJ64GU202 includes a software-controllable internal pull-up but only activates it during USB reset/connect handshake; an external pull-up is required for full-speed enumeration reliability. The MCLR pin (26) needs a 10 kohm pull-up to VDD for normal operation and 1 nF cap to ground to suppress ESD-induced resets. Do not run I/O pins faster than 25 MHz to avoid EMI issues.
Compliance Information
Industrial temperature range -40C to +85C. RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - not recommended for automotive safety applications.
