PIC24FJ64GA102-I/SS - 16-Bit 32MHz 64KB Flash XLP MCU | Microchip
MPN: PIC24FJ64GA102-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.05 | $30.50 |
| 100 | $2.68 | $268.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC24FJ64GA102-I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, programmable I/O peripherals, and supporting logic on a single die. The PIC24FJ64GA102 belongs to the PIC24F family of 16-bit general-purpose microcontrollers, which sit in Microchip's 16-bit MCU hierarchy between the 8-bit PIC16/PIC18 families and the 32-bit PIC32 family. The PIC24F sub-family is optimized for low-power, cost-sensitive embedded designs where 16-bit performance is sufficient but 32-bit cores are not required.
Key specifications include 21 general-purpose I/O pins, two 16-bit timers, a 10-bit ADC with up to 10 channels, a 9-bit DAC, multiple communication peripherals (UART, SPI, I2C), and CTMU for capacitive touch sensing. The device also integrates a real-time clock and calendar (RTCC) with calendar mode, a 16-bit comparator, and a charge measurement module. XLP technology enables typical deep-sleep currents down to 20 nA, supporting years of operation from a single coin cell in battery-powered applications.
The PIC24FJ64GA102 uses a modified Harvard architecture with a 16-bit instruction word and a 24-bit program address space. Internal phase-locked loop (PLL) blocks multiply the external oscillator to reach the 32 MHz CPU clock, allowing designs to use low-frequency crystals while still meeting computational requirements. The peripheral pin select (PPS) feature provides flexible remapping of digital peripherals to physical pins, simplifying PCB layout and BOM changes late in the design cycle.
Typical applications include battery-powered sensor nodes, wearable health monitors, e-metering, remote controls, USB human-interface devices (when combined with an external transceiver), and industrial control front-ends. The 21 I/O count fits compact boards where a 28-pin SSOP provides easy hand-soldering and breadboard-friendly prototyping.
When designing with this MCU, always tie all VSS and VDD pins and configure the unused I/O pins as outputs to minimize quiescent current. Use the ICSP programming interface for in-circuit firmware updates and select the appropriate oscillator mode based on accuracy versus power trade-offs. This page combines distributor pricing, drop-in compatible alternatives, and practical design notes that go beyond the manufacturer datasheet.
Drop-in alternatives for PIC24FJ64GA102-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 PIC24FJ64GA102-I/SS (same form factor and footprint) — differing in ADC, Package, Timers, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GA002-I/SS
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC24FJ32GA102-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.4 / Unit
View Datasheet →PIC24FJ48GA002-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.4 / Unit
View Datasheet →PIC24FJ64GA102-E/SS
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC24FJ64GA102-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| Family | PIC24FJ GA1 Series |
| Maximum CPU Frequency | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 64 KB (22K x 24) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit, up to 10 channels |
| DAC | 9-bit |
| Timers | 5 x 16-bit (Timer1/2/3/4/5) |
| Communication | 2x UART, 2x SPI, 2x I2C |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | SSOP-28 |
| Mounting Type | Surface Mount |
| Low-Power Mode | nanoWatt XLP, Deep Sleep < 1 uA typical |
| RoHS Status | Compliant |
PIC24FJ64GA102-I/SS Pin Configuration
| Pin 1 | SDA1/RP9/CN21/RB9 — I2C1 SDA / Remappable Peripheral / Change Notification |
| Pin 2 | RP8/SCL1/CN20/RB8 — I2C1 SCL / Remappable Peripheral |
| Pin 3 | RP7/INT0/CN23/RB7 — Remappable Peripheral / External Interrupt 0 |
| Pin 4 | RP6/INT1/CN22/RB6 — Remappable Peripheral / External Interrupt 1 |
| Pin 5 | RP5/CN19/RB5 — Remappable Peripheral |
| Pin 6 | RP4/CN18/RB4 — Remappable Peripheral |
| Pin 7 | RP3/CN17/RB3 — Remappable Peripheral |
| Pin 8 | MCLR — Master Clear (Reset, active low) |
| Pin 9 | VSS — Ground |
| Pin 10 | OSC1/CLKI/RA3 — Crystal oscillator input / External clock |
| Pin 11 | OSC2/CLKO/RA2 — Crystal oscillator output / RA2 |
| Pin 12 | PGED2/RP0/CN4/RA0 — ICSP Programming Data / Remappable Peripheral |
| Pin 13 | PGEC2/RP1/CN5/RA1 — ICSP Programming Clock / Remappable Peripheral |
| Pin 14 | AN9/RP15/CN11/RB15 — Analog input 9 / Remappable Peripheral |
| Pin 15 | AN10/RP14/CN10/RB14 — Analog input 10 / Remappable Peripheral |
| Pin 16 | AN11/RP13/CN9/RB13 — Analog input 11 / Remappable Peripheral |
| Pin 17 | AN12/RP12/CN8/RB12 — Analog input 12 / Remappable Peripheral |
| Pin 18 | CVREF/AN0/RP2/CN2/RA4 — Comparator reference / Analog input 0 |
| Pin 19 | VREF+/AN1/RA5 — ADC voltage reference positive / Analog input 1 |
| Pin 20 | VREF-/AN2/RA6 — ADC voltage reference negative / Analog input 2 |
| Pin 21 | RP16/CN12/RB0 — Remappable Peripheral |
| Pin 22 | RP17/CN13/RB1 — Remappable Peripheral |
| Pin 23 | RP10/CN16/RB10 — Remappable Peripheral |
| Pin 24 | RP11/CN15/RB11 — Remappable Peripheral |
| Pin 25 | VCAP/VDDCORE — Internal voltage regulator output (decoupling cap) |
| Pin 26 | RP18/CN14/RB2 — Remappable Peripheral |
| Pin 27 | AVSS — Analog Ground |
| Pin 28 | AVDD — Analog Power Supply |
Typical Applications
PIC24FJ64GA102-I/SS is suitable for 6 applications: Battery-Powered Sensor Node, Wearable Health Monitor, Electronic Metering (e-Meter), Industrial Control Front-End, Remote Control (IR/RF), Capacitive Touch HMI.
Battery-Powered Sensor Node
The PIC24FJ64GA102-I/SS fits battery-powered sensor nodes because its nanoWatt XLP technology enables typical Deep Sleep currents below 1 uA while retaining 8 KB SRAM and the RTCC calendar. Operating from 2.0V to 3.6V it can run directly from a single 3V lithium coin cell, and the 10-bit ADC with 10 channels supports direct thermistor, voltage, and current measurements. Unlike higher-MIPS 32-bit MCUs it consumes much less sleep power and at 32 MHz still executes 16 MIPS, enough for periodic sensor read, FFT filtering, and BLE/Zigbee packet assembly. Place the MCU between the cell and the radio module; cycle between Sleep, ADC sample, transmit, and Deep Sleep, achieving multi-year battery life in low-duty-cycle IoT deployments.
Recommended
Wearable Health Monitor
Wearable health monitors need low-power 16-bit processing for heart-rate sensing, step counting, and BLE packet handling - all of which the PIC24FJ64GA102-I/SS provides. Its 64 KB Flash fits firmware for sensor fusion and the 8 KB SRAM holds sample buffers without external memory. XLP Deep Sleep at <1 uA and Idle at <8 uA preserve battery life between BLE transmissions. Unlike 8-bit MCUs it handles 16-bit ADC samples and DSP filters for heart-rate variability in real time. Deploy it alongside a BLE module like the RN4870; the MCU aggregates sensor data, runs motion-compensation algorithms, then forwards processed packets to a phone.
Recommended
Electronic Metering (e-Meter)
Electronic metering (gas, water, electric submeter) needs an MCU that can run continuously from a battery for 10+ years, do accurate 16-bit signal processing, and store calibration data - a precise fit for the PIC24FJ64GA102-I/SS. Its XLP Deep Sleep <1 uA combined with the RTCC for time-stamping data logs preserves coin-cell capacity, and 64 KB Flash holds application code plus metering tables. Unlike simple 8-bit MCUs it runs 16 MIPS, enough to sample at 4 kHz and compute true-RMS without external DSP. The on-chip 10-bit ADC is supplemented by the 16-bit timer for precise pulse-counting from meter sensors.
Recommended
Industrial Control Front-End
Industrial control front-ends need a robust MCU that interfaces analog sensors, drives relays or motor drivers, and talks Modbus over UART - all roles the PIC24FJ64GA102-I/SS handles well. Its 21 I/O pins are routed via Peripheral Pin Select (PPS), letting UART, SPI, and I2C remap to any digital pin, which simplifies PCB layout revisions. Operating from -40C to +85C it tolerates factory floor environments, and 64 KB Flash fits Modbus stack plus application logic. Unlike 5V MCUs the 3.3V I/O matches modern ADCs and sensors without level shifters. Use it as the master controller reading 4-20 mA inputs via the on-chip ADC and driving SSR outputs.
Recommended
Remote Control (IR/RF)
Remote controls require long battery life, low-cost 16-bit processing for button debouncing and protocol encoding, and small package - all satisfied by the PIC24FJ64GA102-I/SS. XLP Sleep modes <1 uA preserve coin-cell capacity over years of standby, and 32 MHz performance handles NEC, RC5, or proprietary IR protocols in real time. The 21 I/O pins accept a matrix keypad up to 5x5 directly, and the 9-bit DAC can drive a status LED or audio feedback. Unlike complex Cortex-M MCUs it boots in microseconds from Deep Sleep, ensuring instant button response on wake.
Recommended
Capacitive Touch HMI
Capacitive touch HMIs benefit from the PIC24FJ64GA102-I/SS's on-chip CTMU (Charge Time Measurement Unit), which measures capacitance changes on touch electrodes without an external touch controller IC. With up to 21 I/O the MCU can scan a small matrix of touch buttons or a slider directly, and 64 KB Flash supports advanced touch firmware libraries like Microchip's mTouch framework. The 16 MIPS CPU executes noise-immune touch algorithms (like the Driven Shield+ method) in real time, providing reliable operation under wet conditions. The 3.3V supply is compatible with modern backlit displays and I2C GPIO expanders.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA102-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GA002-I/SS | PIC24FJ64GA102-E/SS | PIC24FJ32GA102-I/SS | PIC24FJ48GA002-I/SS | PIC24FJ64GA102-I/ML |
|---|---|---|---|---|---|---|
| Package | SSOP-28 | SSOP-28 (same) | SSOP-28 (same) | SSOP-28 (same) | SSOP-28 (same) | QFN-28 (different - NOT drop-in) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 64 KB | 64 KB (same) | 64 KB (same) | 32 KB (-50%) | 48 KB (-25%) | 64 KB (same) |
| Data Memory (SRAM) | 8 KB | 8 KB (same) | 8 KB (same) | 8 KB (same) | 8 KB (same) | 8 KB (same) |
| Maximum CPU Frequency | 32 MHz (16 MIPS) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| 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 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| USB Peripheral | None | None (same) | None (same) | None (same) | None (same) | None (same) |
| Approx. Price @ qty 100 (USD) | $2.68 | $2.65 (similar) | $3.00 (similar) | $2.40 (-10%) | $2.55 (-5%) | $2.85 (similar) |
Key Differentiators
- On-chip CTMU for capacitive touch sensing without external controller (vs PIC24FJ64GA002-I/SS)
- nanoWatt XLP extreme low-power technology (vs Generic 8-bit MCUs (e.g., PIC16F877A))
- Peripheral Pin Select (PPS) for flexible remapping (vs Fixed-pin peripherals on many competing MCUs)
Design Notes
Estimated: For a coin-cell sensor node running at 3.0V with 32 MHz CPU active only during 1 ms bursts at 0.1% duty cycle, average current = (1 mA * 0.001) + (1 uA deep sleep * 0.999) ~ 2 uA. From a 220 mAh CR2032 this gives roughly 12.5 years of theoretical life. Always enable the internal LDO regulator by tying VCAP/VDDCORE (pin 25) to a 10 uF decoupling capacitor to VSS; never leave this pin floating or core voltage will be unstable. Use the BOR (Brown-Out Reset) to recover gracefully from voltage dips.
Estimated: Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/AVDD pin and a 10 uF bulk cap on the AVDD rail to filter ADC noise. For PCB layouts with long traces, add a ferrite bead between VDD and AVDD to isolate analog supply noise. Keep the crystal oscillator traces short (<10 mm) and surrounded by a ground guard ring. Route the ICSP programming signals (PGED2/PGEC2) to a 6-pin header accessible for in-circuit firmware updates. Maintain a continuous ground plane under the IC to minimize EMI.
Estimated: Three frequent mistakes: (1) Floating unused I/O pins - configure as digital outputs driven low to minimize supply current; leaving them as inputs can cause shoot-through and parasitic current draw. (2) Forgetting the VCAP decoupling cap - the PIC24F requires a 10 uF capacitor on pin 25; without it the core voltage regulator oscillates. (3) Not configuring all VSS pins - both pin 9 (digital VSS) and pin 27 (analog AVSS) must be tied to ground, even if ADC is unused. Always reference the datasheet pinout before PCB layout to avoid rework.
Estimated: For SSOP-28 hand-soldering, use a fine-tip iron (0.5 mm) with leaded or lead-free SAC305 solder, set to 320 C. Use flux pen and pre-tin pads. For production, reflow profile should follow IPC/JEDEC J-STD-020 with peak temperature of 245 C for SAC305. The SSOP-28 footprint requires careful solder paste stencil design - 4 mil thickness with aperture ratio of 0.9 to avoid solder bridges between 0.65 mm pitch pins. A ground plane under the IC, stitched with vias on 1 mm pitch, improves thermal dissipation and EMI performance.
Compliance Information
PIC24FJ64GA102-I/SS is RoHS compliant per Microchip product page. It is not AEC-Q100 qualified; use PIC24FJ64GA102-E/SS variant for extended temperature or automotive-grade applications with proper qualification.
