PIC24FJ64GA102-I/ML - 64KB Flash 16-bit MCU | Microchip
MPN: PIC24FJ64GA102-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.72 | $3.72 |
| 10 | $3.35 | $33.50 |
| 100 | $2.98 | $298.00 |
| 500 | $2.68 | $1,340.00 |
| 1,000 | $2.42 | $2,420.00 |
PIC24FJ64GA102-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one silicon die. Within the broader taxonomy, a microcontroller belongs to the family of embedded processors, sitting between discrete logic controllers and full microprocessors. The PIC24FJ sub-family specifically belongs to Microchip's 16-bit PIC24F "General Purpose Flash" tier, which balances computational throughput, peripheral richness, and ultra-low power consumption for portable and battery-backed products. By embedding both analog and digital peripherals on-chip, the PIC24FJ64GA102 reduces BOM cost and PCB area for designers who would otherwise need external ADCs, op-amps, or RTC chips.
Key features include an integrated 10-bit ADC with up to 16 channels, multiple UART/SPI/I2C interfaces, five 16-bit timers, a real-time clock calendar (RTCC), and a nanoWatt XLP sleep mode with current consumption measured in microamps. Hardware capacitive touch support and a CTMU (Charge Time Measurement Unit) enable touch-button or proximity-sensing user interfaces without an external controller IC. The 28-QFN package provides a compact 6x6 mm footprint while exposing all 21 general-purpose I/O pins through multiplexed peripheral mappings.
Typical applications include portable medical monitors, battery-powered sensor nodes, eMetering and smart thermostats, USB peripherals, and consumer appliances such as coffee makers or white goods. Design considerations when choosing this part include matching I/O count to application needs (21 GPIOs), ensuring the 2.5V/3.3V dual-voltage operation is compatible with target peripherals, and using the XLP sleep modes aggressively for battery-life targets. This page synthesizes distributor pricing, drop-in alternatives within the same 28-QFN footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ64GA102-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 PIC24FJ64GA102-I/ML (same form factor and footprint) — differing in Package, ADC, Timers, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GA102T-I/ML
✅ Drop-In✓ In Stock
$3.27 / Unit
View Datasheet →PIC24FJ64GA002-I/ML
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC24FJ64GA104-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.05 / Unit
View Datasheet →PIC24FJ32GA102-I/ML
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC24FJ64GP202-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.42 / Unit
View Datasheet →PIC24FJ16GA002-I/ML
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC24FJ64GA102-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit RISC (modified Harvard) |
| Program Memory (Flash) | 64 KB (22K x 24) |
| RAM | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage | 2.5V / 3.3V |
| Package | 28-QFN (6x6 mm) with Exposed Pad |
| Operating Temperature | -40C to +85C (Industrial -I grade) |
| GPIO Count | 21 |
| ADC | 10-bit, up to 16 channels |
| Communication Interfaces | UART, SPI, I2C |
| Timers | 5 x 16-bit |
| RTCC | Yes (Real-Time Clock Calendar) |
| XLP nanoWatt Sleep Modes | Yes |
| CTMU (Capacitive Touch) | Yes |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC24FJ64GA102-I/ML Pin Configuration
| Pin 1 | RA0 — GPIO / analog input AN0 |
| Pin 2 | RA1 — GPIO / analog input AN1 |
| Pin 3 | RA2 — GPIO / analog input AN2 |
| Pin 4 | RA3 — GPIO / analog input AN3 |
| Pin 5 | RA4 — GPIO / analog input AN4 |
| Pin 6 | AVDD — Analog supply voltage |
| Pin 7 | AVSS — Analog ground reference |
| Pin 8 | RA5 — GPIO / analog input AN5 |
| Pin 9 | RA6 — GPIO / analog input AN6 / oscillator |
| Pin 10 | RA7 — GPIO / analog input AN7 / oscillator |
| Pin 11 | RB0 — GPIO / programming |
| Pin 12 | RB1 — GPIO |
| Pin 13 | RB2 — GPIO |
| Pin 14 | RB3 — GPIO |
| Pin 15 | RB4 — GPIO |
| Pin 16 | RB5 — GPIO |
| Pin 17 | RB6 — GPIO / ICSPCLK |
| Pin 18 | RB7 — GPIO / ICSPDAT |
| Pin 19 | VSS — Digital ground |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | RB8 — GPIO |
| Pin 22 | RB9 — GPIO |
| Pin 23 | RC0 — GPIO |
| Pin 24 | RC1 — GPIO |
| Pin 25 | RC2 — GPIO |
| Pin 26 | RC3 — GPIO |
| Pin 27 | RC4 — GPIO |
| Pin 28 | RC5 — GPIO |
Typical Applications
PIC24FJ64GA102-I/ML is suitable for 7 applications: Portable Medical Monitoring Device, Battery-Powered IoT Sensor Node, Smart Thermostat and HVAC Controller, USB HID Peripheral Device, Consumer Appliance User Interface, Electronic Smart Meter (eMeter), Industrial Sensor Transmitter.
Portable Medical Monitoring Device
The PIC24FJ64GA102-I/ML fits portable medical monitors with its 16 MIPS performance and nanoWatt XLP sleep modes drawing under 1 uA. The 64 KB Flash accommodates patient data logging and BLE command stacks while the 10-bit ADC handles sensor signal conditioning from pulse-oximetry or temperature probes. Its 2.0V-3.6V wide operating range supports both 3V coin-cell and single-cell Li-ion supplies. The CTMU enables touch-button user interfaces on medical enclosures without mechanical switches that harbor bacteria. Industrial -40C to +85C temperature range supports ambulance and outdoor responder use cases.
Recommended
Battery-Powered IoT Sensor Node
For battery-powered IoT sensor nodes the PIC24FJ64GA102-I/ML combines XLP sleep current in microamps with adequate Flash for protocol stacks like LoRaWAN or BLE peripherals. The 21 GPIO count directly interfaces digital sensors, I2C/SPI peripherals, and indicator LEDs without external muxing. Running at 32 MHz the core processes edge-computing tasks between long sleep intervals, and the integrated RTCC maintains accurate time-stamping even in deep sleep. 28-QFN package keeps the node below 100 mm^2, suitable for coin-cell-powered wireless sensor deployments.
Recommended
Smart Thermostat and HVAC Controller
The PIC24FJ64GA102-I/ML is well-matched to smart thermostat and HVAC controller applications thanks to its 10-bit ADC reading multiple thermistor inputs and its CTMU enabling capacitive touch for the front-panel UI. The RTCC schedules HVAC setback cycles with backup from a 32 kHz crystal, while 8 KB RAM holds scheduling tables and the user-interface state machine. Industrial temperature grade ensures reliable operation in attics and basements where temperatures swing from -10C to +60C. PIC24F's deterministic interrupt latency simplifies the HVAC control loop timing.
Recommended
USB HID Peripheral Device
The PIC24FJ64GA102-I/ML can serve USB HID peripherals when paired with an external USB transceiver, leveraging its 16 MIPS throughput for HID report processing and 64 KB Flash for HID descriptors and report buffers. Its 21 GPIO count supports button matrices, LED indicators, and encoder inputs typical of custom HID peripherals. PIC24F's peripheral pin select (PPS) feature allows remapping digital functions to any GPIO, simplifying PCB routing for compact HID designs. The 28-QFN (6x6 mm) package suits space-constrained dongle-style HID products.
Recommended
Consumer Appliance User Interface
For consumer appliances like coffee makers or washing machines, the PIC24FJ64GA102-I/ML provides capacitive touch via CTMU, motor control PWM timers, and 64 KB Flash for menu logic and diagnostic routines. The 5 available 16-bit timers drive brushless DC motor commutation or induction-heating control loops without an external motor controller IC. Industrial temperature rating handles under-cabinet or garage appliance environments. 8 KB RAM supports multilingual UI string tables for global appliance SKUs.
Recommended
Electronic Smart Meter (eMeter)
The PIC24FJ64GA102-I/ML fits electronic smart meters where metering accuracy, low standby power, and integrated RTC are mandatory. The 10-bit ADC with 16 channels reads current/voltage sensors via burden resistors or CTs, while XLP sleep modes enable 10+ year battery life on the meter's communication backup supply. The RTCC provides time-of-use billing timestamps even during power outages, and the 64 KB Flash stores tariff schedules plus DLMS/COSEM protocol stacks. -40C cold-start operation supports outdoor meter installations.
Recommended
Industrial Sensor Transmitter
The PIC24FJ64GA102-I/ML suits 4-20 mA industrial sensor transmitters with its analog integration, RS-485-capable UART, and 64 KB Flash for calibration tables. Industrial -40C to +85C operation matches process plant and outdoor transmitter environments. The CTMU supports capacitive level sensing for tank transmitters, while the 10-bit ADC reads thermocouples via external amplification. PPS (Peripheral Pin Select) flexibility simplifies PCB routing in compact IP67 enclosures where board real estate is minimal.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA102-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GA102T-I/ML | PIC24FJ64GA002-I/ML | PIC24FJ32GA102-I/ML | PIC24FJ16GA002-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB | 16 KB |
| RAM | 8 KB | 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 | 32 MHz / 16 MIPS |
| GPIO Count | 21 | 21 | 21 | 21 | 21 |
| CTMU Capacitive Touch | Yes | Yes | No | Yes | No |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| 1+ Price (USD) | 3.72 | 3.72 | 3.45 | 3.20 | 2.95 |
Key Differentiators
- CTMU capacitive touch peripheral integrated (vs PIC24FJ64GA002-I/ML)
- Full 64 KB Flash plus 8 KB RAM (vs PIC24FJ32GA102-I/ML)
- Industrial -40C to +85C temperature grade (vs PIC24FJ16GA002-I/ML)
Design Notes
The PIC24FJ64GA102-I/ML's nanoWatt XLP sleep modes draw under 1 uA typical with RTCC active. For battery-powered designs, switch to Sleep mode with RTCC and wake via RTCC alarm or external interrupt on RB0-RB3 pins. Estimated: at 3V VDD with RTCC running and all other peripherals off, average current of 2 uA is achievable - yielding ~5 years from a 2000 mAh CR2032 cell with hourly wake duty cycle.
The 28-QFN (6x6 mm) package's exposed thermal pad should be soldered to a top-layer copper pour of at least 25 mm^2 to meet the datasheet's theta_JA of 38 C/W. Without the thermal pad connection, theta_JA rises to ~85 C/W. For continuous 16 MIPS operation at 85C ambient, ensure the thermal pad is connected for reliable operation. Estimated: 0.5W power dissipation yields 19 C junction rise with proper pad soldering vs 42 C rise without.
Place the 28-QFN decoupling network as close to VDD/AVDD pins as possible - use a 100 nF ceramic between each VDD/AVDD pin and ground. Add a bulk 4.7 uF to 10 uF tantalum or ceramic capacitor on the main VDD rail. The AVSS pin should be tied directly to a clean analog ground island; the VSS digital ground should connect to this island at a single point near the IC. This prevents digital switching noise from corrupting the ADC reference.
Configuration bits must be programmed to enable the correct oscillator mode and disable unused peripherals. Forgetting to disable the JTAG port on RB6/RB7 leaves those pins unusable as GPIO - configure DEBUG <1:0> = 0 to free them. The AVDD pin must always be powered when using the ADC, even if all analog inputs are unused. Brown-out Reset (BOR) should remain enabled for production firmware reliability.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - automotive applications should consider PIC24FJ variants with automotive grade marking.
