PIC24FJ64GB202-I/MM - 16-bit 32MHz 64KB Flash USB MCU | Microchip
MPN: PIC24FJ64GB202-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.53 | $35.30 |
| 100 | $3.13 | $313.00 |
| 500 | $2.79 | $1,395.00 |
| 1,000 | $2.46 | $2,460.00 |
PIC24FJ64GB202-I/MM Overview
A 16-bit microcontroller is a microprocessor whose data path, registers and ALU operate on 16-bit words, providing higher code density, more precise arithmetic, and richer peripheral integration than typical 8-bit MCUs. PIC24F devices sit in the PIC microcontroller taxonomy as: PIC microcontroller -> 16-bit MCU -> PIC24F family -> PIC24FJ XLP sub-family. They are widely used in battery-powered and USB-connected embedded designs where deterministic performance, low power, and small package size are required.
The PIC24FJ64GB202 is differentiated by its built-in USB 2.0 Full-Speed OTG transceiver, integrated crypto engine with secure key storage, hardware random-number generator, and nanowatt XLP sleep currents. Core-independent peripherals (CIPs) such as the 16-bit PWM, multiple UART/SPI/I2C, a 10/12-bit ADC, and a real-time clock/calendar offload tasks from the CPU and let the device stay asleep longer. The on-chip 32 kHz low-power oscillator and wide peripheral set further reduce external component count.
Architecturally, the device uses a 16-bit modified Harvard core with a 24-bit instruction word and 16-bit data path, supported by a deterministic interrupt controller and a flexible pin-mapping PPS (Peripheral Pin Select) layer. The combination of ECC-protected Flash, hardware crypto acceleration, and eXtreme Low Power modes makes the part well suited to designs where both data security and battery life are critical. With its small 6x6 mm QFN footprint, the device enables compact board layouts for space-constrained IoT products.
Typical applications include USB peripherals such as HID keyboards, mice and CDC bridges, secure IoT sensor nodes, wearable health monitors, smart meters, secure remote controls, and low-power industrial sensor hubs. The integrated USB and crypto blocks reduce BOM cost in connected devices that must also meet IEC 60730 class-B or similar functional-safety check routines.
When designing with this part, note that the 28-pin QFN-S package lacks an integrated debug header; route the dedicated PGECx/PGEDx programming pins to test pads or a tag-connect footprint for in-circuit programming. Plan USB DP/DM trace routing as a 90-ohm differential pair and provide a 5V-tolerant Vbus sense input through a divider.
This page synthesizes verified distributor pricing, drop-in replacement candidates, and practical design notes that go beyond the manufacturer datasheet to help engineers shorten the selection cycle.
Drop-in alternatives for PIC24FJ64GB202-I/MM — 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 PIC24FJ64GB202-I/MM (same form factor and footprint) — differing in ADC, Package, Timers, Program Memory (Flash), RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GB002-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GB002-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GB004T-I/ML
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC24FJ64GA002-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GB202-I/MM
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC24FJ64GB202-I/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F modified Harvard |
| Program Memory (Flash) | 64 KB |
| Data RAM | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed OTG, on-chip transceiver |
| Crypto Engine | Integrated hardware AES/SHA, secure key storage, RNG |
| ADC | 10-bit 1.1 Msps, up to 9 channels |
| Timers | 5 x 16-bit, plus 32-bit RTCC |
| Communication | UART, SPI, I2C, USB OTG, PMP |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 28-pin QFN-S (6x6 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| Low-Power Modes | nanowatt XLP: Sleep, Deep Sleep, VBAT |
| RoHS Status | Compliant |
PIC24FJ64GB202-I/MM Pin Configuration
| Pin 1 | RA0 — Analog/digital I/O; PGED1 |
| Pin 2 | RA1 — Analog/digital I/O; PGEC1 |
| Pin 3 | RA2 — Analog/digital I/O |
| Pin 4 | RA3 — Analog/digital I/O; reference voltage |
| Pin 5 | VDD — Positive supply voltage (2.0-3.6 V) |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RB0 — Digital I/O; PGED2 |
| Pin 8 | RB1 — Digital I/O; PGEC2 |
| Pin 9 | RB2 — Digital I/O; USB D- |
| Pin 10 | RB3 — Digital I/O; USB D+ |
| Pin 11 | RB4 — Digital I/O; USB Vbus sense |
| Pin 12 | RB5 — Digital I/O |
| Pin 13 | RB6 — Digital I/O |
| Pin 14 | RB7 — Digital I/O |
| Pin 15 | VSS — Ground reference |
| Pin 16 | RC0 — Digital I/O |
| Pin 17 | RC1 — Digital I/O |
| Pin 18 | RC2 — Digital I/O |
| Pin 19 | RC3 — Digital I/O |
| Pin 20 | RC4 — Digital I/O |
| Pin 21 | RC5 — Digital I/O |
| Pin 22 | RC6 — Digital I/O |
| Pin 23 | RC7 — Digital I/O |
| Pin 24 | RB8 — Digital I/O |
| Pin 25 | RB9 — Digital I/O |
| Pin 26 | RB10 — Digital I/O |
| Pin 27 | RB11 — Digital I/O |
| Pin 28 | RB12 — Digital I/O |
Typical Applications
PIC24FJ64GB202-I/MM is suitable for 7 applications: USB HID Peripheral (Keyboard/Mouse/CDC Bridge), Secure IoT Sensor Node, Wearable Health Monitor, Smart Meter / Secure Remote Control, Low-Power Industrial Sensor Hub, Battery-Powered USB-C Accessory, Industrial Control Panel Interface.
USB HID Peripheral (Keyboard/Mouse/CDC Bridge)
The PIC24FJ64GB202-I/MM integrates a USB 2.0 Full-Speed OTG transceiver, removing the need for an external PHY and roughly USD 0.40-0.80 in BOM cost. With 16 MIPS at 32 MHz and 8 KB RAM, the part comfortably handles HID class descriptors and CDC ACM line-discipline buffering for USB-to-UART bridges. The XLP sleep mode below 100 nA allows the device to be bus-powered and wake on USB resume. It is a natural choice for USB keyboards, mice, and serial-port replacement dongles.
Recommended
Secure IoT Sensor Node
Hardware AES/SHA, secure key storage, and a true random-number generator in the PIC24FJ64GB202-I/MM allow offloading of TLS cipher work from the CPU, reducing active CPU time and saving 1-3 mW per TLS handshake. Nanowatt XLP sleep at tens of nA plus RTCC wake-up enables years of battery life on a CR2032 for periodic sensor readings. Pin-compatible variants such as PIC24FJ128GB202-I/MM scale up to OTA firmware-image buffering. The 28-QFN 6x6 mm footprint fits inside a coin-cell sensor housing.
Recommended
Wearable Health Monitor
Wearable designs demand sub-mA active current and tens-of-nA sleep current, both of which the PIC24FJ64GB202-I/MM delivers through XLP modes with RAM and RTCC retention. The 12-bit ADC and 9-channel mux integrate directly with photoplethysmography (PPG) and skin-conductance sensors. USB OTG enables convenient firmware update or data download from a charging cradle, while the small 6x6 mm QFN keeps the PCB under 100 mm². Optional crypto engine supports encrypted patient data at rest.
Recommended
Smart Meter / Secure Remote Control
Smart meters need secure communication and tamper-resistant firmware, both delivered by the PIC24FJ64GB202-I/MM hardware crypto engine and secure key storage. The RTCC plus VBAT retention mode keeps accurate time across power outages. USB is useful for local diagnostic log download by field technicians, while the 64 KB Flash holds protocol stacks (e.g., Wireless M-Bus) plus calibration tables. Industrial -40 C to +85 C operation covers outdoor meter enclosures.
Recommended
Low-Power Industrial Sensor Hub
Industrial sensor hubs aggregate data from UART, SPI, or I2C sensors and forward over USB, Wi-Fi companion, or wired fieldbus. The PIC24FJ64GB202-I/MM provides four UART, three SPI, and three I2C ports with PPS to remap them onto 28-QFN pins, eliminating the external logic used by discrete 8-bit designs. ECC Flash is rated for >100k erase cycles, supporting firmware A/B update schemes for reliability. The 32 MHz CPU runs deterministic control loops without DMA conflicts.
Recommended
Battery-Powered USB-C Accessory
The PIC24FJ64GB202-I/MM with USB OTG and 2.0-3.6 V operation runs directly off a Li-ion cell with a low-dropout regulator, while the 28-QFN footprint fits inside USB-C connector dongles. The hardware crypto engine protects pairing keys for headsets, e-cigarettes, or styluses. The 8 KB RAM is sufficient for Bluetooth/USB command parsing without external memory. Standby current is dominated by the LDO, not the MCU.
Recommended
Industrial Control Panel Interface
Industrial HMI panels benefit from the PIC24FJ64GB202-I/MM PMP (Parallel Master Port) for driving character or TFT displays and 32 MHz performance for smooth menu navigation. USB-CDC bridges the panel to a host controller for firmware upgrade. Industrial -40 C to +85 C temperature and ECC Flash deliver the long-term reliability required for factory-floor deployment. The PWM peripheral supports backlight and buzzer drive without external drivers.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GB202-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GB002-I/MM | PIC24FJ32GB002-I/MM | PIC24FJ64GA002-I/MM | PIC24FJ128GB202-I/MM | PIC24FJ64GB004T-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) | 28-QFN (6x6 mm) | 28-QFN-S (6x6 mm) | 28-QFN (ML package code) |
| Flash | 64 KB | 64 KB | 32 KB | 64 KB | 128 KB | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| USB | Full-Speed OTG | Full-Speed OTG | Full-Speed OTG | None | Full-Speed OTG | Full-Speed device only |
| Crypto Engine | AES/SHA + RNG | None | None | None | AES/SHA + RNG | AES/SHA + RNG |
| Max 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 |
| Operating 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 | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Industrial Temp (-40 to +85 C) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated hardware crypto engine (AES/SHA + secure key storage + RNG) (vs PIC24FJ64GB002-I/MM)
- On-chip USB 2.0 Full-Speed OTG transceiver (vs PIC24FJ64GA002-I/MM)
- Nanowatt XLP sleep with RTCC retention below 100 nA (vs PIC24FJ64GB004T-I/ML)
Design Notes
Decouple VDD/VSS pairs with a 100 nF X7R ceramic placed within 3 mm of each pin pair. Add a bulk 4.7 uF to 10 uF on the main VDD rail to absorb USB inrush during enumeration. The internal USB analog supply draws bursts of current up to 25 mA; a separate 3.3 V LDO feeding AVUSB reduces coupling into digital VDD and improves USB signal integrity.
Route USB D+/D- as a 90-ohm differential pair with matching length (delta <150 mil) and keep the pair over a continuous ground reference. Place the 15 kohm pull-down on D- and 1.5 kohm pull-up on D+ (selected by software) close to the pins. Expose the PGEC2/PGED2 pads on a 0.05" header or Tag-Connect footprint for in-circuit programming and debug.
Do not exceed VDD > 3.6 V or the Flash and USB blocks can be permanently damaged. Always configure the Peripheral Pin Select (PPS) registers before enabling peripherals, otherwise input functions stay on default pins and outputs remain unmapped. The RTCC requires a 32.768 kHz crystal on SOSCO/SOSCI pins when using crystal mode; on-chip LPRC has roughly 5% accuracy which is too coarse for calendar timekeeping.
Keep the 28-QFN central thermal pad soldered to a continuous ground copper pour with at least 8 thermal vias (0.3 mm drill, 0.5 mm pitch). This both dissipates the modest 0.4 W worst-case power and reduces ground-bounce noise that could couple into the USB differential pair. Avoid routing high-frequency traces under the QFN body where they cannot be serviced.
Estimated: USB Full-Speed enumeration must complete within 100 ms at 12 Mbps. Maintaining an eye-pattern-compliant differential pair requires controlled impedance of 90 ohms +/- 10% and < 2 ns skew. If the application is host mode, route Vbus through a current-limiting PTC and add ESD protection (USBLC6-2SC6 or equivalent) to survive IEC 61000-4-2 air-discharge events up to 15 kV.
Compliance Information
RoHS compliance and lead-free process per Microchip product page. Not AEC-Q100 qualified (industrial grade only); use PIC24FJ64GB202-I/MM for non-automotive applications.
