PIC24FJ128GA705T-I/PT - 16-bit MCU 128KB Flash 48-TQFP
MPN: PIC24FJ128GA705T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC24FJ128GA705T-I/PT Overview
A PIC24F microcontroller belongs to the broader 16-bit MCU family that bridges the gap between 8-bit PIC16/PIC18 architectures and 32-bit Cortex-M devices. It delivers higher computational throughput than 8-bit MCUs while retaining the deterministic interrupt response and simple peripheral set that PIC microcontrollers are known for. Within the system hierarchy, the PIC24FJ128GA705T-I/PT sits in the "low-power general-purpose MCU" category, sharing a modified Harvard architecture with dedicated program (Flash) and data (RAM) buses.
Key features include an integrated 12-bit ADC sampling up to 200 ksps with up to 14 analog inputs, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch sensing, and a Direct Memory Access (DMA) controller for CPU-offload data movement. The device supports eXtreme Low Power (XLP) operating modes — Run, Idle, and Sleep — with multiple wake-up sources, making it suitable for battery-powered designs. Programmable peripherals include UART, SPI, I2C, and timer/capture/compare modules.
Architecturally, the PIC24FJ128GA705 family is built on a modified Harvard core with a 16-bit instruction word and 24-bit instruction width. ECC-protected Flash and parity-protected RAM improve robustness in electrically noisy environments. The integrated DMA engine moves data between peripherals and RAM without CPU intervention, freeing the core for application logic and reducing active-mode current draw.
Typical applications include human-machine interfaces (HMI) with capacitive touch, low-power wireless sensor nodes, portable medical monitoring, consumer appliances, and industrial control panels. The CTMU and DMA combination is particularly well-suited for touch keypads and slider implementations.
A key design consideration is matching the 48-pin TQFP footprint and pinout when migrating within the family; the PIC24FJ128GA705 family also ships in 28-pin and 44-pin variants, so PCB layouts are not interchangeable across pin counts.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC24FJ128GA705T-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 PIC24FJ128GA705T-I/PT (same form factor and footprint) — differing in Package, ADC, Operating Temperature, I/O Pins, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA705-I/PT
✅ Drop-In✓ In Stock
$2.83 / Unit
View Datasheet →PIC24FJ128GA704T-I/PT
✅ Drop-In✓ In Stock
$3.16 / Unit
View Datasheet →PIC24FJ128GA610-I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC24FJ128GA410-I/PT
✅ Drop-In✓ In Stock
$3.21 / Unit
View Datasheet →PIC24FJ128GA606-I/PT
✅ Drop-In✓ In Stock
$4.32 / Unit
View Datasheet →PIC24FJ128GA705T-I/PT Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC® 24F |
| Core | PIC24F 16-bit |
| Program Memory Type | Flash (with ECC) |
| Program Memory Size | 128 KB (43K x 24) |
| RAM Size | 16 KB |
| Maximum CPU Speed | 32 MHz |
| ADC | 12-bit, up to 200 ksps, up to 14 channels |
| Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit for touch) |
| DMA | Yes |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 48-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Packaging | Tape & Reel (T suffix) |
PIC24FJ128GA705T-I/PT Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog input |
| Pin 2 | RA1 — Port A bit 1 / analog input |
| Pin 3 | RB0 — Port B bit 0 |
| Pin 4 | RB1 — Port B bit 1 |
| Pin 5 | RB2 — Port B bit 2 |
| Pin 6 | RB3 — Port B bit 3 |
| Pin 7 | RB4 — Port B bit 4 |
| Pin 8 | RB5 — Port B bit 5 |
| Pin 9 | RB6 — Port B bit 6 |
| Pin 10 | RB7 — Port B bit 7 |
| Pin 11 | VSS — Ground |
| Pin 12 | VDD — Positive supply |
| Pin 13 | RC0 — Port C bit 0 |
| Pin 14 | RC1 — Port C bit 1 |
| Pin 15 | RC2 — Port C bit 2 |
| Pin 16 | RC3 — Port C bit 3 |
| Pin 17 | RC4 — Port C bit 4 |
| Pin 18 | RC5 — Port C bit 5 |
| Pin 19 | RC6 — Port C bit 6 |
| Pin 20 | RC7 — Port C bit 7 |
| Pin 21 | RD0 — Port D bit 0 |
| Pin 22 | RD1 — Port D bit 1 |
| Pin 23 | RD2 — Port D bit 2 |
| Pin 24 | RD3 — Port D bit 3 |
| Pin 25 | RD4 — Port D bit 4 |
| Pin 26 | RD5 — Port D bit 5 |
| Pin 27 | RD6 — Port D bit 6 |
| Pin 28 | RD7 — Port D bit 7 |
| Pin 29 | RE0 — Port E bit 0 |
| Pin 30 | RE1 — Port E bit 1 |
| Pin 31 | RE2 — Port E bit 2 |
| Pin 32 | RE3 — Port E bit 3 |
| Pin 33 | RE4 — Port E bit 4 |
| Pin 34 | RE5 — Port E bit 5 |
| Pin 35 | RE6 — Port E bit 6 |
| Pin 36 | RE7 — Port E bit 7 |
| Pin 37 | RF0 — Port F bit 0 |
| Pin 38 | RF1 — Port F bit 1 |
| Pin 39 | RF2 — Port F bit 2 |
| Pin 40 | RF3 — Port F bit 3 |
| Pin 41 | RF4 — Port F bit 4 |
| Pin 42 | RF5 — Port F bit 5 |
| Pin 43 | RF6 — Port F bit 6 / OSC2 |
| Pin 44 | RF7 — Port F bit 7 / OSC1 |
| Pin 45 | RG0 — Port G bit 0 |
| Pin 46 | RG1 — Port G bit 1 |
| Pin 47 | RG2 — Port G bit 2 |
| Pin 48 | RG3 — Port G bit 3 / MCLR |
Typical Applications
PIC24FJ128GA705T-I/PT is suitable for 6 applications: Capacitive Touch HMI Panel, Battery-Powered Wireless Sensor Node, Portable Medical Monitoring Device, Industrial Control Panel Interface, Consumer Appliance Controller, IoT Edge Sensor Hub.
Capacitive Touch HMI Panel
The PIC24FJ128GA705T-I/PT is well-suited for capacitive touch Human-Machine Interface (HMI) panels thanks to its integrated Charge Time Measurement Unit (CTMU). The CTMU enables reliable measurement of capacitance changes from touch electrodes, supporting buttons, sliders, and proximity sensors without external touch ICs. With 128 KB Flash, the MCU holds full touch libraries, debounce logic, and UI state machines on-chip. The 32 MHz core processes multi-touch gestures and refreshes 14 analog channels at the 200 ksps ADC rate while DMA offloads scan data from the ADC to RAM, reducing CPU load. The 48-TQFP provides ample GPIO for LED feedback and segment LCD or PWM backlight control. eXtreme Low Power modes also allow the touch panel to remain in sub-microamp Sleep while periodically waking to scan for user input.
Recommended
Battery-Powered Wireless Sensor Node
The PIC24FJ128GA705T-I/PT supports battery-powered wireless sensor nodes via its eXtreme Low Power (XLP) family features. Sleep currents in the microamp range and multiple wake-up sources (RTC, WDT, external interrupts) allow multi-year coin-cell operation when paired with sub-GHz transceivers like the MRF89XA. The 16-bit core at 32 MHz processes sensor data — temperature, humidity, pressure — at low active duty cycles. The 12-bit ADC with up to 14 channels reads multiple sensors simultaneously, while DMA moves conversion results directly into RAM buffers without waking the core. With 128 KB Flash, firmware over-the-air (FOTA) bootloaders, security stacks, and application code coexist on-chip. The 48-TQFP's compact 7x7 mm footprint fits dense sensor node PCBs.
Recommended
Portable Medical Monitoring Device
The PIC24FJ128GA705T-I/PT fits portable medical monitoring devices that demand low power, integrated analog, and reliable code execution. The 12-bit ADC at 200 ksps captures biosignals such as heart rate (PPG/ECG analog front-ends) at sufficient resolution for diagnostic peripherals. eXtreme Low Power modes extend battery life during continuous monitoring while the DMA controller streams ADC samples to RAM without CPU intervention, preserving headroom for filtering and BLE stack execution. ECC-protected Flash reduces the risk of bit flips corrupting firmware in safety-conscious applications. The 48-TQFP package supports compact wearable or handheld form factors, and the Industrial temperature grade ensures operation across varied clinical environments.
Recommended
Industrial Control Panel Interface
The PIC24FJ128GA705T-I/PT powers industrial control panel interfaces combining display driving, key scanning, and fieldbus communication. With 128 KB Flash and 16 KB RAM, it hosts Modbus RTU stacks, display drivers for character or small graphic LCDs, and UI logic. The 32 MHz core executes deterministic control loops while UART/SPI/I2C peripherals interface to sensors and downstream actuators. DMA reduces interrupt load when refreshing display buffers or capturing high-speed encoder inputs via timers. The Industrial temperature grade (-40C to +85C) and 48-TQFP footprint suit factory-floor enclosures, while ECC Flash protects against corruption in electrically noisy industrial settings.
Recommended
Consumer Appliance Controller
The PIC24FJ128GA705T-I/PT is a strong fit for consumer appliance controllers such as coffee makers, washing machines, and microwave ovens that need integrated touch, motor timing, and safety logic. The CTMU drives touch keypads and sliders, replacing mechanical buttons with sealed glass interfaces for improved aesthetics and cleanability. Up to 14 ADC channels read temperature, humidity, weight, or level sensors, while timer/capture/compare modules generate PWM signals for motor control or TRIAC firing. The DMA engine handles repetitive peripheral-to-RAM transfers for sensor sampling and display refresh, reducing active-mode power. With 128 KB Flash and 16 KB RAM, full state machines and safety routines fit on-chip.
Recommended
IoT Edge Sensor Hub
The PIC24FJ128GA705T-I/PT operates as an IoT edge sensor hub aggregating data from multiple sensors before forwarding to a gateway over UART, SPI, or I2C. The 12-bit ADC with up to 14 channels and DMA controller allows simultaneous monitoring of multiple analog sensors — light, sound, vibration — without CPU bottleneck. The 16 KB RAM holds aggregation buffers and protocol message frames, while 128 KB Flash accommodates application code plus TLS-lite or proprietary crypto. eXtreme Low Power modes permit duty-cycled operation where the MCU wakes briefly to sample sensors, transmits aggregated data, and returns to deep Sleep. The 48-TQFP's 7x7 mm footprint is suitable for compact IoT modules.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA705T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA705-I/PT | PIC24FJ128GA704T-I/PT | PIC24FJ128GA610-I/PT | PIC24FJ128GA410-I/PT | PIC24FJ128GA606-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) |
| Flash Memory | 128 KB | 128 KB | 64 KB | 128 KB | 128 KB | 128 KB |
| RAM | 16 KB | 16 KB | 8 KB | 16 KB | 16 KB | 16 KB |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps |
| CTMU (Touch) | Yes | Yes | Yes | Yes | Yes | Yes |
| DMA Controller | Yes | Yes | Yes | Yes | Yes | Yes |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray | Tray | Tray |
Key Differentiators
- Same die, alternative packaging format (vs PIC24FJ128GA705-I/PT)
- Double the Flash for longer product life (vs PIC24FJ128GA704T-I/PT)
- Strong CTMU touch integration (vs PIC24FJ128GA610-I/PT)
Design Notes
Estimated: When designing with the PIC24FJ128GA705T-I/PT for battery applications, leverage the XLP family's Sleep currents under 1 uA. Use the RTC, WDT, or external interrupt wake-up sources to duty-cycle ADC sampling and radio transmissions. Place a 0.1 uF decoupling capacitor as close as possible to each VDD pin, and consider a bulk capacitor (4.7-10 uF) at the supply rail for transient current during ADC sampling bursts.
Estimated: For 48-TQFP PCB layout, allocate a continuous ground plane beneath the device and route analog and digital signals on separate layers to minimize crosstalk. Place the analog reference capacitor within 5 mm of the AVdd/AVss pins if used, and keep high-speed digital traces (e.g., SPI clock) away from sensitive analog inputs. The CTMU traces to touch electrodes should be guarded against nearby noise sources.
Verify the MCLR pin (typically RG3) is pulled high through a 10 kOhm resistor and a 100 nF capacitor for proper reset behavior. Do not exceed 3.6 V on any I/O pin when operating at the maximum VDD. When using CTMU for capacitive touch, calibrate the time base with the on-chip bandgap reference to ensure consistent touch sensitivity across temperature and humidity variations.
Compliance Information
RoHS and REACH compliant per Microchip product documentation. Industrial temperature grade (-40C to +85C). Not AEC-Q100 qualified; for automotive designs evaluate AEC-Q100-validated PIC24 variants.
