PIC24FJ64GA102-I/SO - 16-bit 32MHz 64KB Flash MCU | Microchip
MPN: PIC24FJ64GA102-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.62 | $362.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.89 | $2,890.00 |
PIC24FJ64GA102-I/SO Overview
A PIC24 microcontroller is a 16-bit Modified Harvard RISC architecture MCU from Microchip's PIC24F family. As a microcontroller, it integrates a CPU core, Flash program memory, SRAM, and a rich set of peripherals (ADC, UART, SPI, I2C, timers, comparators, RTCC) into a single IC. Within the broader semiconductor taxonomy, PIC24F sits below the 32-bit PIC32 and dsPIC33/dsPIC33E families but above the 8-bit PIC16/PIC18 families, targeting applications that need more computational power and richer peripherals than 8-bit MCUs while remaining cost-effective and easy to deploy with MPLAB X IDE and XC16 toolchains.
Key features include 64KB Flash program memory (22K x 24 words), 8KB SRAM, a 10-bit 1.1 Msps ADC with up to 10 channels, four 16-bit timers, two UART, two I2C, and two SPI modules. The device includes nanoWatt XLP technology for ultra-low-power operation with sleep currents as low as 20 nA, making it ideal for battery-operated applications. It also features a Real-Time Clock and Calendar (RTCC) with calendar mode.
The PIC24FJ64GA102 architecture uses a 16-bit data path with 24-bit instructions for compact code density and high computational throughput. The 32MHz internal oscillator combined with a hardware multiplier and DSP engine enables efficient signal processing. Peripherals are mapped via a Peripheral Pin Select (PPS) system, allowing flexible routing of digital functions to physical pins and simplifying PCB layout in space-constrained designs.
Typical applications include portable medical devices, industrial sensor nodes, low-power wireless sensor hubs, consumer electronics with LCD/keypad interfaces, USB peripherals, and battery-powered IoT edge nodes. The combination of XLP low-power modes, ample Flash/RAM, and rich connectivity peripherals makes it well-suited for human-machine interface (HMI) panels and remote controls.
When designing with this part, pay attention to the PPS configuration: peripherals must be remapped to physical pins after reset. Ensure decoupling capacitors are placed close to VDD/VSS pairs, and consider using the internal 32kHz Low-Power RC oscillator for sleep modes to minimize current draw. Boundary-scan support (JTAG) requires the BSDL file from Microchip.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in same-package alternatives from the PIC24FJ64GA family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ64GA102-I/SO — 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/SO (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GA002-I/SO
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →PIC24FJ128GA102-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32GA102-I/SO
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC24FJ16GA102-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GA102-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F Modified Harvard RISC |
| Family | PIC24F XLP |
| Program Memory (Flash) | 64 KB (22K x 24 words) |
| Data SRAM | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| ADC | 10-bit, up to 10 channels, 1.1 Msps |
| Comparators | 3 (with selectable reference) |
| UART Modules | 2 |
| SPI Modules | 2 |
| I2C Modules | 2 |
| Timers (16-bit) | 5 (Timer1-5) |
| RTCC (Real-Time Clock) | Yes (calendar mode) |
| Peripheral Pin Select (PPS) | Yes |
| Package | 28-pin SOIC (SO) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24FJ64GA102-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — PORTA bit 0 / analog input AN0 |
| Pin 3 | RA1 — PORTA bit 1 / analog input AN1 |
| Pin 4 | RA2 — PORTA bit 2 / analog input AN2 / CVREF |
| Pin 5 | RA3 — PORTA bit 3 / analog input AN3 / VREF+ |
| Pin 6 | RA4 — PORTA bit 4 / analog input AN4 |
| Pin 7 | RA5 — PORTA bit 5 / analog input AN5 / VREF- |
| Pin 8 | VDD — Positive supply voltage (2.0V-3.6V) |
| Pin 9 | OSC1 — Oscillator crystal input / CLKI |
| Pin 10 | OSC2 — Oscillator crystal output / CLKO |
| Pin 11 | RB0 — PORTB bit 0 / AN6 / PGED1 |
| Pin 12 | RB1 — PORTB bit 1 / AN7 / PGEC1 |
| Pin 13 | RB2 — PORTB bit 2 / AN8 |
| Pin 14 | RB3 — PORTB bit 3 / AN9 |
| Pin 15 | RB4 — PORTB bit 4 |
| Pin 16 | RB5 — PORTB bit 5 |
| Pin 17 | RB6 — PORTB bit 6 / ICSPCLK |
| Pin 18 | RB7 — PORTB bit 7 / ICSPDAT |
| Pin 19 | VSS — Ground reference |
| Pin 20 | RB8 — PORTB bit 8 |
| Pin 21 | RB9 — PORTB bit 9 |
| Pin 22 | RC0 — PORTC bit 0 |
| Pin 23 | RC1 — PORTC bit 1 |
| Pin 24 | RC2 — PORTC bit 2 |
| Pin 25 | RC6 — PORTC bit 6 |
| Pin 26 | RC7 — PORTC bit 7 |
| Pin 27 | VSS — Ground reference (second) |
| Pin 28 | VDD — Positive supply voltage (second) |
Typical Applications
PIC24FJ64GA102-I/SO is suitable for 6 applications: Portable Medical Devices, Industrial Sensor Nodes, Battery-Powered IoT Edge Nodes, Human-Machine Interface (HMI) Panels, USB Consumer Peripherals (via PIC24FJ64GB migration), Remote Controls and Consumer Accessories.
Portable Medical Devices
The PIC24FJ64GA102-I/SO fits battery-powered medical devices thanks to nanoWatt XLP sleep currents as low as 20 nA and a 32MHz/16 MIPS core that runs signal-processing firmware efficiently. The 10-bit 1.1 Msps ADC with up to 10 channels captures multiple sensor signals (SpO2, temperature, ECG lead) without an external ADC. Real-Time Clock and Calendar (RTCC) with calendar mode maintains accurate time-stamping of patient logs across battery swaps. The 8KB SRAM fits small RTOS task stacks and BLE stack snippets for wireless data export. The 28-SOIC package keeps the PCB small enough for handheld form factors, while 2.0-3.6V operation supports a single Li-ion or 2xAA supply. Unlike Cortex-M0+ MCUs, this part retains Microchip's MPLAB ecosystem, mature libraries, and long-term supply stability for medical OEM lifecycles exceeding 10 years.
Recommended
Industrial Sensor Nodes
The PIC24FJ64GA102-I/SO is well matched to industrial 4-20mA sensor transmitters, Modbus RTU slaves, and remote telemetry units. Its two UARTs allow simultaneous RS-485 Modbus and debug-console connectivity without an external transceiver bridge. PPS (Peripheral Pin Select) lets designers route UART/SPI/I2C to any digital pin, simplifying PCB layout when sensor placements change. The 64KB Flash accommodates full Modbus stack plus custom calibration tables, while 8KB SRAM is adequate for command buffers and floating-point math via the hardware multiplier. Industrial temperature range (-40C to +85C) is supported on this 'I' (industrial) grade part. The XLP sleep modes extend battery life in remote, solar-powered sensor nodes where replacement costs are high. Hardware RTCC timestamps data logs without an external RTC IC.
Recommended
Battery-Powered IoT Edge Nodes
IoT edge nodes such as BLE beacons, LoRaWAN endpoints, and Zigbee sleepys benefit from the PIC24FJ64GA102-I/SO's nanoWatt XLP technology and flexible peripherals. Sleep current of ~20 nA in deep sleep with RTCC running allows multi-year coin-cell operation. Two UART and two SPI interfaces connect to popular wireless modules (RN4871, SX1276) without firmware compromises. The 64KB Flash stores application code plus wireless protocol stacks; 8KB SRAM is sufficient for sensor pre-processing and encryption buffers. PPS pin mapping keeps GPIO flexible when radio modules change. The 28-SOIC package supports hand-soldered prototyping and is also friendly to reflow profiles. Designers can scale to PIC24FJ128GA102-I/SO if memory headroom is exhausted, or to PIC24FJ64GB002-I/SO if USB connectivity becomes a requirement.
Recommended
Human-Machine Interface (HMI) Panels
HMI panels with LCDs, keypads, and rotary encoders use the PIC24FJ64GA102-I/SO for its 10-bit ADC (touch/proximity sense), two I2C buses (for I/O expanders and EEPROM), and ample Flash for menu frameworks and 5x7 font tables. The 32MHz CPU renders segmented-LCD updates with no flicker and handles debounced matrix keypads in real time. PPS flexibility allows assigning I2C, SPI, and UART lines to any pins so PCB layout fits unusual bezel shapes. The 8KB SRAM accommodates framebuffer and message queues. Real-Time Clock and Calendar (RTCC) supports scheduling features like night-mode auto-dimming. The 28-SOIC package is cost-effective for mid-volume HMI production. Compared to 8-bit PIC16 alternatives, the 16-bit core simplifies C++ state machines and avoids bank-switching headaches in display code.
Recommended
USB Consumer Peripherals (via PIC24FJ64GB migration)
For USB-enabled consumer peripherals, the PIC24FJ64GA102-I/SO serves as a stepping stone to the USB-capable PIC24FJ64GB002-I/SO, which adds an integrated USB 2.0 Full-Speed transceiver and on-chip pull-up. Designers can prototype the same firmware on PIC24FJ64GA102-I/SO and migrate to the GB part with minimal code changes, since both share core, Flash, RAM, and most peripherals. USB Human Interface Device (HID), CDC, and mass-storage classes fit comfortably in 64KB Flash. The 28-SOIC package is the same, so PCB layout stays identical. Unlike external-USB-MCU combos that need a separate USB chip and crystal, the GB part reduces BOM cost. The XLP sleep modes keep USB suspend current under 1 mA as required by USB-IF compliance.
Recommended
Remote Controls and Consumer Accessories
The PIC24FJ64GA102-I/SO is well suited to universal remote controls, smart-home keypads, and audio accessories where ultra-low standby current and IR/wireless connectivity matter. The two UARTs and two SPIs let designers add Wi-Fi or sub-GHz radios alongside IR transmit/receive circuitry. nanoWatt XLP technology with RTCC keeps calendar and wake-up functions alive on a coin cell for years, while the 32MHz core handles IR protocols (RC5, NEC, SIRC) in firmware without external timers. The 8KB SRAM supports small audio buffer or voice-command preprocessing. The 28-SOIC package is robust to handheld drop-test stress compared to smaller QFN. Compared to 8-bit PIC16, this 16-bit core simplifies USB-CDC firmware for accessories that occasionally tether to a PC for firmware updates.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA102-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GA002-I/SO | PIC24FJ128GA102-I/SO | PIC24FJ32GA102-I/SO | PIC24FJ16GA102-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Flash Memory | 64 KB | 64 KB | 128 KB | 32 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 4 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V |
| nanoWatt XLP | Yes | No (pre-XLP silicon) | Yes | Yes | Yes |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes |
| Industrial Temperature (-40C to +85C) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- nanoWatt XLP deep-sleep current as low as ~20 nA with RTCC running (vs PIC24FJ64GA002-I/SO)
- Two UART, two I2C, two SPI - rich connectivity without multiplexing (vs PIC24FJ16GA102-I/SO)
- Peripheral Pin Select (PPS) for flexible PCB routing (vs PIC24FJ64GA002-I/SO)
Design Notes
Estimated: with VDD=3.3V and MCU active at 32MHz, typical IDD is approximately 15 mA; deep sleep with RTCC drops to ~20 nA per the XLP family datasheet. Add 0.1uF ceramic decoupling on each VDD/VSS pair (two pairs on this 28-SOIC) plus a single 10uF bulk capacitor. For battery life calculations, assume 80% deep-sleep duty cycle and verify with MPLAB X Power Analysis. Always tie MCLR high through a 10k resistor and add a 100nF cap if long reset pulses are needed.
Place decoupling caps within 3mm of each VDD/VSS pin pair (pins 8/19 and 27/28). Keep the OSC1/OSC2 traces short and symmetric - maximum 5mm between the MCU and the crystal or resonator. If using an external 32.768 kHz crystal for RTCC, route those traces (SOSCO/SOSCI) symmetrically and guard them with a ground pour to reduce noise coupling. The exposed pad of any future QFN variant (not present on this 28-SOIC) must be soldered to a 4x4 via array for thermal relief.
Peripheral Pin Select (PPS) lets you remap UART/SPI/I2C outputs to any digital pin. After reset, PPS mappings are unlocked - configure them once during initialization and lock them to prevent accidental changes. Keep dedicated analog inputs (ANx) on PORTA/PORTB if ADC accuracy matters; avoid using PPS-assigned digital outputs near analog pins to minimize crosstalk. Reserve at least one digital-only pin for ICSPDAT and one for ICSPCLK to keep in-circuit programming accessible.
Do not apply 5V to any I/O pin - the part is 3.3V maximum. Brown-out reset (BOR) must be enabled in configuration bits for reliable startup. Without BOR, VDD droops below 2.0V can corrupt Flash. Do not omit the VDD/VSS bulk capacitor - the in-rush current during Flash writes causes voltage dips that can trigger spurious resets. If migrating firmware from PIC24FJ64GA002, review errata DS80000491 because the 'GA102' silicon revision introduces subtle differences in ADC and comparator behavior.
Compliance Information
RoHS/REACH compliant per Microchip product page and DigiKey badges. Industrial temperature grade (-40C to +85C) only; not AEC-Q100 qualified for automotive. Halogen-free per Microchip environmental compliance documentation.
