PIC24FJ16GA002T-I/SO - 16-bit 32MHz MCU, 16KB Flash | Microchip
MPN: PIC24FJ16GA002T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.55 | $35.50 |
| 100 | $3.12 | $312.00 |
| 500 | $2.78 | $1,390.00 |
| 1,000 | $2.45 | $2,450.00 |
PIC24FJ16GA002T-I/SO Overview
An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, program and data memory, plus peripherals such as timers, communication interfaces, and ADCs. Within Microchip's taxonomy, the PIC24FJ series is the 16-bit mid-performance MCU family, sitting between the 8-bit PIC16/PIC18 line and the 32-bit PIC32 families. PIC24F parts use a modified Harvard RISC architecture with a 16-bit instruction word, C-compiler-friendly ISA, and 17-bit x 17-bit hardware multiply - making them a popular choice for cost-sensitive applications that outgrow 8-bit performance.
Key features include 21 digital I/O pins, two analog comparators, up to five 16-bit timers, two UART, one SPI, one I2C, a 10-bit ADC, and a real-time clock/calendar (RTCC). The device also integrates a 32 kHz low-power oscillator, a charge time measurement unit (CTMU) for capacitive touch, and a 4-channel DMA controller. Programmable brown-out reset, low-voltage detect, and windowed watchdog timer provide robust fault handling.
Architecturally, the PIC24FJ16GA002 is built on a 16-bit data path with a 24-bit instruction word and is supported by the MPLAB X IDE and the MPLAB XC16 C compiler. The XLP technology enables deep sleep currents in the microamp range and multiple wake-up sources, which is essential for energy-harvesting and battery-backed designs.
Typical applications include IoT sensor nodes, low-power industrial sensors, USB human-interface devices (HID), portable medical monitors, battery chargers, and general-purpose embedded control. It also suits capacitive touch user interfaces, simple graphics displays, and motor control loops when paired with external drivers.
When designing with this MCU, ensure 1.8-3.6 V core voltage compliance and add proper decoupling (100 nF plus 10 uF bulk) close to the VDD/VSS pins. The RTCC requires a 32.768 kHz crystal or external clock for accurate timekeeping, and unused I/O pins should be configured as outputs low to minimize leakage.
This datasheet page synthesizes distributor pricing, drop-in SOIC-28 alternatives within the PIC24F family, and practical design notes that are not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ16GA002T-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 PIC24FJ16GA002T-I/SO (same form factor and footprint) — differing in Package, ADC, Timers, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ16GA002-I/SO
✅ Drop-In✓ In Stock
$2.27 / Unit
View Datasheet →PIC24FJ16GA002T-I/ML
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC24FJ16GA002T-I/SS
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC24FJ32GA002-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ64GA002-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.78 / Unit
View Datasheet →PIC24FJ16GA002-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.85 / Unit
View Datasheet →PIC24FJ16GA002-E/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.71 / Unit
View Datasheet →PIC24FJ16GA002T-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC24F (16-bit RISC, modified Harvard) |
| Program Memory (Flash) | 16 KB (5.5K x 24 words) |
| Data RAM | 4 KB (4K x 8) |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit, 10-channel |
| Comparators | 2 |
| Timers (16-bit) | 5 |
| UART | 2 |
| SPI | 1 |
| I2C | 1 |
| DMA Channels | 4 |
| RTCC | Yes |
| Package | 28-SOIC (7.50 mm body width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial -I) |
| Low-Power Technology | eXtreme Low Power (XLP) |
| Programming/Debug | ICSP via MPLAB ICD/REAL ICE/PICKit |
| RoHS Status | Compliant |
| Halogen Free | Compliant (per GlobalSpec listing) |
PIC24FJ16GA002T-I/SO Pin Configuration
| Pin 1 | RA0 — Digital I/O / analog input AN0 |
| Pin 2 | RA1 — Digital I/O / analog input AN1 |
| Pin 3 | RA2 — Digital I/O / analog input AN2 |
| Pin 4 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| Pin 5 | RA4 — Digital I/O / analog input AN4 |
| Pin 6 | AVDD — Analog supply voltage |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | OSC1 — Crystal oscillator input |
| Pin 9 | OSC2 — Crystal oscillator output |
| Pin 10 | RC0 — Digital I/O |
| Pin 11 | RC1 — Digital I/O |
| Pin 12 | RC2 — Digital I/O |
| Pin 13 | RC3 — Digital I/O |
| Pin 14 | RC4 — Digital I/O |
| Pin 15 | RC5 — Digital I/O |
| Pin 16 | RC6 — Digital I/O |
| Pin 17 | RC7 — Digital I/O |
| Pin 18 | RC8 — Digital I/O |
| Pin 19 | RC9 — Digital I/O |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | VSS — Digital ground |
| Pin 22 | RB0 — Digital I/O / programming clock |
| Pin 23 | RB1 — Digital I/O / programming data |
| Pin 24 | RB2 — Digital I/O |
| Pin 25 | RB3 — Digital I/O |
| Pin 26 | RB4 — Digital I/O |
| Pin 27 | RB5 — Digital I/O |
| Pin 28 | RB6 — Digital I/O |
Typical Applications
PIC24FJ16GA002T-I/SO is suitable for 6 applications: Low-Power IoT Sensor Node, Capacitive Touch User Interface, Battery-Powered Industrial Sensor, Portable Medical Monitor, USB Human Interface Device (HID), Smart Battery Charger / Power Bank Controller.
Low-Power IoT Sensor Node
The PIC24FJ16GA002T-I/SO is an ideal host MCU for wireless IoT sensor nodes that spend most of their life in sleep mode. Its eXtreme Low Power (XLP) technology delivers deep-sleep currents below 1 uA with multiple wake sources including RTCC alarm and external interrupts. The 10-bit 10-channel ADC samples analog sensors with adequate resolution for temperature, humidity, and battery voltage monitoring. The 16 MIPS core easily handles local data processing, threshold detection, and serial protocol framing before transmitting via an external sub-GHz or BLE transceiver. Combined with 16 KB Flash and 4 KB RAM, it can run lightweight RTOS or state-machine firmware for years on a single coin cell. Recommended companions: MRF24XA sub-GHz transceiver and a 32.768 kHz crystal for accurate RTCC timekeeping.
Recommended
Capacitive Touch User Interface
The PIC24FJ16GA002T-I/SO integrates a Charge Time Measurement Unit (CTMU) and 21 digital I/O pins, making it a natural fit for capacitive touch buttons, sliders, and proximity sensors. The CTMU measures capacitance changes in real time, supporting self-capacitance and mutual-capacitance electrode layouts without an external touch controller IC. The 16 MIPS core runs Microchip's mTouch library for water-tolerant, EMC-robust touch algorithms, while XLP deep sleep keeps idle quiescent current in the microamp range for battery-powered remote controls and appliances. The 28-SOIC package supports standard PCB assembly with easy rework during product development. Recommended companions: AT42QT1010 single-channel touch IC for handoff and TCN75A thermal sensor for compensation.
Recommended
Battery-Powered Industrial Sensor
Industrial sensor platforms benefit from the PIC24FJ16GA002T-I/SO's -40 C to +85 C industrial temperature rating and wide 2.0-3.6 V supply range, which simplifies direct Li-ion or 3.6 V Li-SOCl2 cell powering. The 10-bit ADC digitizes 4-20 mA loop or 0-10 V sensor signals, while the 5 timer modules handle pulse counting from flow meters and quadrature encoders. Hardware DMA offloads peripheral-to-memory transfers, leaving the CPU free for advanced filtering algorithms. The integrated RTCC provides accurate timestamps for logged events without external RTC hardware, and the windowed watchdog timer ensures recovery from firmware faults in unattended installations. Recommended companions: MCP1700 3.3 V LDO regulator and MCP9700 analog temperature sensor.
Recommended
Portable Medical Monitor
The PIC24FJ16GA002T-I/SO suits portable medical monitors such as pulse oximeters, blood pressure cuffs, and glucose meters where low noise and deterministic response matter. Its 16 MIPS core handles real-time SpO2 plethysmograph signal processing and LCD driving, while 4 KB RAM buffers waveform samples for peak detection. The XLP sleep mode extends battery life across patient monitoring sessions, and the CTMU plus comparator block enables touch-button user interfaces with waterproof electrodes. The 28-SOIC mechanical package survives drop-testing and field use better than smaller QFN options. Recommended companions: MCP6002 op-amp for front-end signal conditioning and a segment LCD driver.
Recommended
USB Human Interface Device (HID)
Although the PIC24FJ16GA002T-I/SO lacks native USB, it can pair with an external USB-to-serial bridge or USB-capable PIC24F variant to create low-cost HID products such as custom keyboards, mice, and game controllers. The 16 MIPS core handles USB HID report descriptors, matrix scanning, and LED control with comfortable timing margin. Five 16-bit timers drive PWM for RGB lighting effects, while DMA unloads repetitive buffer transfers from the CPU. Recommended companions: PIC24FJ64GB004 family for native USB, MCP2200 USB-to-UART bridge, and WS2812B addressable RGB LEDs.
Recommended
Smart Battery Charger / Power Bank Controller
The PIC24FJ16GA002T-I/SO can serve as the supervisory MCU in smart Li-ion battery chargers and power banks, coordinating cell voltage monitoring via the integrated ADC and switching FET gate drive via PWM timer outputs. Its 2.0-3.6 V operation matches single-cell Li-ion chemistries directly, eliminating level shifters. The RTCC logs charge cycle timing for telemetry, and the I2C/SPI peripherals interface with fuel gauge ICs and authentication devices. XLP deep sleep keeps standby current minimal when the power bank is idle, preserving charge. Recommended companions: MCP73831 Li-ion charge controller and MCP3421 18-bit ADC for current sensing.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ16GA002T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ16GA002-I/SO | PIC24FJ32GA002-I/SO | PIC24FJ64GA002-I/SO | PIC24FJ16GA002T-I/ML | PIC24FJ16GA002T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-QFN (ML) - different footprint | 28-SSOP (SS) - different footprint |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 16 KB | 16 KB |
| RAM | 4 KB | 4 KB | 8 KB | 8 KB | 4 KB | 4 KB |
| Core Speed | 32 MHz (16 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| 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 |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Packaging | Tape & Reel | Tube (tray) | Tube | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- Tape-and-reel packaging optimized for high-volume SMT lines (vs PIC24FJ16GA002-I/SO)
- Scalable Flash upgrade path in the same SOIC-28 footprint (vs PIC24FJ16GA002T-I/ML (QFN-28))
- eXtreme Low Power (XLP) technology with sub-microamp deep sleep (vs PIC24HJ12GP202-E/SO)
Design Notes
Decouple both AVDD (pin 6) and VDD (pin 20) with a 10 uF X7R ceramic plus 100 nF ceramic capacitor placed within 5 mm of the pins. AVDD and VDD should be tied together at the supply rail, but if you split them, keep the AVDD filter (ferrite bead + RC) isolated from digital switching transients to preserve 10-bit ADC accuracy. Estimated: with a single 3.3 V rail and 20 mA active current, a 10 uF cap holds the rail within 50 mV during 10 us load steps.
Route the 32.768 kHz crystal traces to OSC1/OSC2 as short and symmetric as possible, surrounded by a grounded guard ring to minimize capacitive coupling to switching nodes. Keep the crystal within 5 mm of the MCU. For best RTCC accuracy, use a 12.5 pF load crystal and verify with the Microchip timer calculator. Avoid routing the crystal traces under the IC or across noisy power planes.
Do not configure unused I/O pins as analog inputs floating - this can inject leakage and noise into the ADC. Always set unused pins as digital outputs driving low, or enable the internal weak pull-downs. Also, the CTMU is sensitive to PCB parasitic capacitance; the Microchip mTouch AN1258 application note provides layout guidelines for 5 mm minimum trace-to-trace spacing on touch electrodes. Estimated: a 5 mm touch trace spacing yields about 2-3 pF inter-electrode capacitance at typical FR4 stackups.
Compliance Information
RoHS compliant per Microchip product page. Halogen-free per GlobalSpec listing. Standard part is not AEC-Q100 qualified - contact Microchip for automotive-grade ordering codes. Conflict-minerals declaration available on Microchip compliance portal.
