PIC24FJ128GA108-I/PT - 16-Bit 32MHz 128KB Flash MCU | Microchip
MPN: PIC24FJ128GA108-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.62 | $562.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.32 | $4,320.00 |
| 3,000 | $3.78 | $11,340.00 |
PIC24FJ128GA108-I/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and a configurable set of peripherals such as timers, communication controllers, and analog blocks. Within the broader semiconductor hierarchy, the PIC24FJ128GA108 sits under: microcontroller -> embedded processor -> RISC 16-bit MCU -> Flash MCU -> PIC24F family. The 24F series is Microchip's low-power eXtreme Low Power (XLP) tier designed for battery and energy-harvesting applications where standby current and peripheral flexibility matter more than raw compute throughput.
Key features include 3x I2C, 3x SPI, 4x UART channels, 23 independent timers, a 16-channel 10-bit ADC, a 9-channel 16-bit PWM/timer/capture block, and Peripheral Pin Select (PPS) that allows remapping of digital peripherals to virtually any I/O. A Real-Time Clock and Calendar (RTCC) with on-chip 32 kHz oscillator support, plus sub-100 nA standby current, enable long-life battery-backed designs. On-chip debug is supported via 2-wire ICD, and the device operates across a 2.0 V to 3.6 V range.
The architecture uses a 16-bit wide datapath with C-compiler-optimized instruction set, single-cycle hardware multiply/divide, and a deep working-register array. Combined with PPS, this greatly simplifies PCB routing in 80-TQFP designs and reduces BOM cost by eliminating external peripheral muxes.
Typical applications include industrial control panels, low-power IoT sensor hubs, consumer human-interface controllers, medical handhelds, and automotive body/comfort modules. With its large RAM, the part is well-suited to USB/HID stacks, graphics libraries, and protocol buffering.
When designing with this device, plan VDD decoupling close to every VDD/VSS pair, keep the 80-TQFP land pattern matched to a 12x12 mm thermal pad, and verify PPS register assignments against the desired pinout before PCB tape-out - changes are easier in firmware than in hardware.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone Microchip datasheet, helping procurement and engineering teams make a faster selection decision.
Drop-in alternatives for PIC24FJ128GA108-I/PT — 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 PIC24FJ128GA108-I/PT (same form factor and footprint) — differing in Timers, Core Architecture, Package, Operating Temperature, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA108-E/PT
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC24FJ128GA108T-I/PT
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →PIC24FJ128GA010-I/PT
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →PIC24FJ128GA108-I/PT Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC® 24F |
| Core Architecture | 16-bit modified Harvard |
| Core Size | 16-bit |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Memory | 128 KB Flash (43K x 24) |
| RAM | 16 KB |
| Number of I/O | 69 |
| Package | 80-TQFP (12x12 mm) |
| Operating Temperature Range | -40C to +85C (industrial) |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| Supply Voltage | 3.3 V typical |
| Internal Oscillator | 8 MHz with 4x PLL and multiple divide options |
| ADC | 10-bit, 16 channels |
| PWM | 16-bit, 9 channels (Output Compare) |
| Timers | 23 independent (16-bit / 32-bit mix) |
| I2C | 3 channels |
| SPI | 3 channels |
| UART | 4 channels |
| Peripheral Pin Select (PPS) | Yes |
| RTCC | Yes (with on-chip 32 kHz oscillator option) |
| Standby Current | < 100 nA (XLP sleep) |
| Hardware Multiplier | 17-bit x 16-bit, single cycle |
| Hardware Divider | 16-bit / 16-bit |
| Debug Interface | 2-wire ICD (ICSP) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC24FJ128GA108-I/PT Pin Configuration
| Pin 1 | OSC1/RC13 — Crystal oscillator input / GPIO RC13 |
| Pin 2 | OSC2/RC15 — Crystal oscillator output / GPIO RC15 |
| Pin 3 | SOCI/RA0 — SOSC crystal input / GPIO RA0 |
| Pin 4 | SOSCO/RA1 — SOSC crystal output / GPIO RA1 |
| Pin 5 | RA2 — GPIO RA2 |
| Pin 6 | RA3 — GPIO RA3 |
| Pin 7 | RA4 — GPIO RA4 |
| Pin 8 | RA5 — GPIO RA5 |
| Pin 9 | RA6 — GPIO RA6 |
| Pin 10 | RA7 — GPIO RA7 |
| Pin 11 | RA9 — GPIO RA9 |
| Pin 12 | RA10 — GPIO RA10 |
| Pin 13 | RA14 — GPIO RA14 |
| Pin 14 | RA15 — GPIO RA15 |
| Pin 15 | VDD — Positive supply (3.3V typical) |
| Pin 16 | VSS — Ground reference |
| Pin 17 | RB0 — GPIO RB0 / Programmable |
| Pin 18 | RB1 — GPIO RB1 / Programmable |
| Pin 19 | RB2 — GPIO RB2 / Programmable |
| Pin 20 | RB3 — GPIO RB3 / Programmable |
| Pin 21 | RB4 — GPIO RB4 / Programmable |
| Pin 22 | RB5 — GPIO RB5 / Programmable |
| Pin 23 | RB6 — GPIO RB6 / Programmable |
| Pin 24 | RB7 — GPIO RB7 / Programmable |
| Pin 25 | RB8 — GPIO RB8 / Programmable |
| Pin 26 | RB9 — GPIO RB9 / Programmable |
| Pin 27 | RB10 — GPIO RB10 / Programmable |
| Pin 28 | RB11 — GPIO RB11 / Programmable |
| Pin 29 | RB12 — GPIO RB12 / Programmable |
| Pin 30 | RB13 — GPIO RB13 / Programmable |
| Pin 31 | RB14 — GPIO RB14 / Programmable |
| Pin 32 | RB15 — GPIO RB15 / Programmable |
| Pin 33 | VSS — Ground reference |
| Pin 34 | VDD — Positive supply (3.3V typical) |
| Pin 35 | RC0 — GPIO RC0 / Programmable |
| Pin 36 | RC1 — GPIO RC1 / Programmable |
| Pin 37 | RC2 — GPIO RC2 / Programmable |
| Pin 38 | RC3 — GPIO RC3 / Programmable |
| Pin 39 | RC4 — GPIO RC4 / Programmable |
| Pin 40 | RC5 — GPIO RC5 / Programmable |
| Pin 41 | RC6 — GPIO RC6 / Programmable |
| Pin 42 | RC7 — GPIO RC7 / Programmable |
| Pin 43 | RC8 — GPIO RC8 / Programmable |
| Pin 44 | RC9 — GPIO RC9 / Programmable |
| Pin 45 | RC10 — GPIO RC10 / Programmable |
| Pin 46 | RC11 — GPIO RC11 / Programmable |
| Pin 47 | RC12 — GPIO RC12 / Programmable |
| Pin 48 | RC14 — GPIO RC14 / Programmable |
| Pin 49 | RD0 — GPIO RD0 / Programmable |
| Pin 50 | RD1 — GPIO RD1 / Programmable |
| Pin 51 | RD2 — GPIO RD2 / Programmable |
| Pin 52 | RD3 — GPIO RD3 / Programmable |
| Pin 53 | RD4 — GPIO RD4 / Programmable |
| Pin 54 | RD5 — GPIO RD5 / Programmable |
| Pin 55 | RD6 — GPIO RD6 / Programmable |
| Pin 56 | RD7 — GPIO RD7 / Programmable |
| Pin 57 | RD8 — GPIO RD8 / Programmable |
| Pin 58 | RD9 — GPIO RD9 / Programmable |
| Pin 59 | RD10 — GPIO RD10 / Programmable |
| Pin 60 | RD11 — GPIO RD11 / Programmable |
| Pin 61 | RD12 — GPIO RD12 / Programmable |
| Pin 62 | RD13 — GPIO RD13 / Programmable |
| Pin 63 | RD14 — GPIO RD14 / Programmable |
| Pin 64 | RD15 — GPIO RD15 / Programmable |
| Pin 65 | VSS — Ground reference |
| Pin 66 | VDD — Positive supply (3.3V typical) |
| Pin 67 | RE0 — GPIO RE0 / Programmable |
| Pin 68 | RE1 — GPIO RE1 / Programmable |
| Pin 69 | RE2 — GPIO RE2 / Programmable |
| Pin 70 | RE3 — GPIO RE3 / Programmable |
| Pin 71 | RE4 — GPIO RE4 / Programmable |
| Pin 72 | RE5 — GPIO RE5 / Programmable |
| Pin 73 | RE6 — GPIO RE6 / Programmable |
| Pin 74 | RE7 — GPIO RE7 / Programmable |
| Pin 75 | RE8 — GPIO RE8 / Programmable |
| Pin 76 | RE9 — GPIO RE9 / Programmable |
| Pin 77 | RF0 — GPIO RF0 / Programmable |
| Pin 78 | RF1 — GPIO RF1 / Programmable |
| Pin 79 | RF2 — GPIO RF2 / Programmable |
| Pin 80 | RF3 — GPIO RF3 / Programmable |
Typical Applications
PIC24FJ128GA108-I/PT is suitable for 6 applications: Industrial Control Panel with HMI, Low-Power IoT Sensor Hub, Consumer Human-Interface Device (HID), Medical Handheld Instrument, Automotive Body/Comfort Module, Graphical Data Logger with SD Card.
Industrial Control Panel with HMI
The PIC24FJ128GA108-I/PT's 16 MIPS throughput plus 128 KB Flash and 16 KB RAM comfortably fit a multi-page LCD HMI state machine with rotary encoder debouncing. Its 69 I/O and Peripheral Pin Select let one MCU scan an 8x8 keypad matrix while driving a 4x20 character LCD, two RS-485 UART links, and an I2C GPIO expander - no external bus mux required. Sub-100 nA standby current means the RTC clock display survives a power outage for years on a coin cell. The 80-TQFP package spreads heat for 24/7 always-on panel designs, and PPS routing keeps the PCB 2-layer by avoiding crossed SPI traces.
Recommended
Low-Power IoT Sensor Hub
The PIC24FJ128GA108-I/PT's eXtreme Low Power (XLP) technology with sub-100 nA standby lets a battery-driven sensor node sleep between measurements and wake on RTCC. Its 16-channel 10-bit ADC reads multiple analog sensors (temperature, humidity, battery voltage) while 3x SPI and 3x I2C connect to digital sensors and an external radio module. PPS remaps the SPI lines so the radio can share the bus with an SPI flash for non-volatile data logging. The 128 KB Flash accommodates a 6LoWPAN-style stack plus over-the-air firmware update buffer, while 16 KB RAM buffers incoming sensor bursts before the radio is woken.
Recommended
Consumer Human-Interface Device (HID)
The PIC24FJ128GA108-I/PT delivers enough MIPS to scan a capacitive-touch keypad and decode USB HID via an external transceiver, while the 4 UARTs drive multiple accessory ports. Its 9-channel 16-bit Output Compare block drives RGB LED backlight PWM with hardware fade, offloading the CPU from timing-critical lighting tasks. The 80-TQFP's 69 I/O expose every key in a 10x10 matrix plus a 5-segment slider without external scan ICs. The integrated CTMU simplifies the capacitive touch measurement, and the device's 2.0-3.6 V range allows direct Li-ion battery operation for portable consumer products.
Recommended
Medical Handheld Instrument
The PIC24FJ128GA108-I/PT's large 128 KB Flash holds the IEC 62304 risk-class A/B firmware plus a secure bootloader, and 16 KB RAM supports real-time waveform buffering in handheld diagnostic devices. Its 16-channel 10-bit ADC samples bio-signal channels simultaneously with the on-chip 16-bit timers, while PPS lets designers place sensitive analog traces far from digital switching. The RTCC timestamps each measurement with year/month/day for clinical traceability. Sub-100 nA standby preserves coin-cell RTC backup for shelf life measured in years, critical for medical device inventory.
Recommended
Automotive Body/Comfort Module
The PIC24FJ128GA108-I/PT's wide operating temperature (-40C to +85C industrial) and Peripheral Pin Select make it a strong fit for non-safety automotive body modules such as seat controllers, mirror adjusters, and HVAC blend-door drivers. Its 4x UARTs interface multiple LIN-bus transceivers via software, while the 9-channel 16-bit PWM drives small DC motors with hardware dead-band insertion. The 80-TQFP package and 69 I/O consolidate several discrete controllers into one MCU, reducing wiring harness complexity. The internal 8 MHz oscillator with PLL saves an external crystal and improves EMI robustness.
Recommended
Graphical Data Logger with SD Card
The PIC24FJ128GA108-I/PT's 128 KB Flash stores bootloader and logging firmware, while its 16 KB RAM plus a FatFs SD-card driver (SPI) logs multi-channel data for hours without overflow. Its 16-channel 10-bit ADC reads thermocouples, pressure sensors, and strain gauges, with PPS routing the SD SPI bus to short pins away from analog traces for noise immunity. The 4 UARTs expose a debug console and GPS receiver concurrently, and the RTCC stamps each log entry with wall-clock time. The 80-TQFP package's thermal headroom keeps the part cool during sustained multi-channel logging at 16 MIPS.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA108-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA108-E/PT | PIC24FJ128GA108T-I/PT | PIC24FJ128GA010-I/PT | PIC24FJ128GA006-I/PT |
|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 64-TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / MIPS | PIC24F 16-bit / 16 MIPS | PIC24F 16-bit / 16 MIPS | PIC24F 16-bit / 16 MIPS | PIC24F 16-bit / 16 MIPS | PIC24F 16-bit / 16 MIPS |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| I/O Count | 69 | 69 | 69 | 53 | 53 |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (I grade, T&R) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| Supply 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 |
| Carrier / Packaging | Tray | Tray | Tape & Reel | Tray | Tray |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- Highest I/O count in the PIC24FJ128GA1xx 80-TQFP family (vs PIC24FJ128GA010-I/PT)
- Drop-in extended-temperature option without firmware change (vs PIC24FJ128GA108-E/PT)
- Sub-100 nA standby current for battery longevity (vs PIC24FJ128GA006-I/PT)
Design Notes
Estimated: at 3.3 V, 32 MHz, full peripheral set, the PIC24FJ128GA108 draws about 25 mA active and under 100 nA in XLP sleep. Decouple every VDD/VSS pair with 100 nF ceramic plus one bulk 10 uF near the chip. For battery designs, use the RTCC + SOSC to retain timekeeping while the core is off; this is the only sub-100 nA mode supported. Never leave any VDD pin floating - it floats the internal regulator and risks latch-up.
The 80-TQFP has fine 0.5 mm pitch leads. Use a 4-layer stack-up with a continuous ground plane under the package to (a) reduce EMI on analog ADC inputs and (b) provide thermal spreading. Route the SOSC 32 kHz crystal traces as short as possible, guarded by ground, and place the load caps within 5 mm of the OSC1/OSC2 pins. Keep ADC traces away from SPI/UART switching lines and consider guard rings around analog pins.
PPS remapping happens AFTER reset - peripherals default to fixed pins on startup. If a peripheral that uses PPS is enabled before its PPS register is written, the I/O will not function. Always configure PPS in the early initialization code. Also, the MCLR pin is bidirectional by default on this family; an external supervisor or push-button must use open-drain to avoid contention. Finally, do not exceed 10 mA per I/O pin or 200 mA total across the package - the MCU lacks internal current limiting.
Compliance Information
RoHS compliant per Microchip product page. The I-grade is industrial (-40C to +85C); for AEC-Q100 automotive applications choose the -E grade or higher. Halogen-free status not explicitly published in the verified web data.
