PIC24FJ128GA705-E/PT - 16-bit 32MHz MCU 128KB Flash | Microchip
MPN: PIC24FJ128GA705-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.42 | $44.20 |
| 100 | $3.91 | $391.00 |
| 500 | $3.48 | $1,740.00 |
| 1,000 | $3.05 | $3,050.00 |
PIC24FJ128GA705-E/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (typically Flash), volatile working memory (RAM), and a rich set of on-chip peripherals. In the broader component taxonomy, the PIC24FJ family sits under 16-bit microcontrollers -> microcontrollers -> embedded controllers -> integrated circuits. The PIC24F 'J' series specifically targets ultra-low-power applications, where sleep current and active efficiency dominate the bill of materials for battery-powered IoT, medical, and industrial nodes.
Key features of the PIC24FJ128GA705 include hardware ECC on Flash for robust code execution, integrated DMA to free the core for control-loop work, a segmented LCD driver option on the larger pin-count variants, and rich connectivity peripherals (UART, SPI, I2C). The 'GA' family adds graphics and LCD-friendly peripherals while the '705' is the highest-memory 48-pin member. The '-E' suffix indicates the -40C to +125C extended operating temperature range suitable for industrial environments.
Typical applications include eXtreme Low Power wireless sensor nodes, capacitive touch user interfaces using CTMU, USB device/host or CAN connectivity via PPS remapping, low-power industrial control with LCD segment displays, and battery-backed metering or remote telemetry. The 48-pin TQFP exposes more I/O than 28/44-pin siblings, supporting parallel bus or dual LCD segment panels.
When designing with this MCU, allocate the regulator budget for XLP sleep currents in the single-digit uA range and verify the CTMU timing capacitor selection for the target touch electrode RC. The Peripheral Pin Select (PPS) feature allows flexible remapping but requires careful review of the device pinout table to avoid electrical conflicts on the same physical pin.
Drop-in alternatives for PIC24FJ128GA705-E/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 PIC24FJ128GA705-E/PT (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA705-I/PT
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View Datasheet →PIC24FJ128GA610-E/PT
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View Datasheet →PIC24FJ128GA606-E/PT
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View Datasheet →PIC24FJ128GA006-I/PT
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View Datasheet →PIC24FJ128GA705-E/PT Maximum Ratings & Electrical Characteristics
| Product Family | PIC24F (16-bit) |
| Core | PIC24F 16-bit MIPS |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Program Flash | 128 KB (43K x 24 words) with ECC |
| RAM | 16 KB |
| ADC | 12-bit, 200 ksps, up to 14 analog inputs |
| Comparators | 3 analog comparators |
| CTMU | Yes (for capacitive touch) |
| DMA | Yes (DMA engine) |
| Operating Temperature | -40C to +125C ('-E' extended grade) |
| Package | 48-TQFP (PT, 7x7 mm) |
| Pin Count | 48 |
| Mounting Type | Surface Mount |
| Power Feature | eXtreme Low Power (XLP) |
| RoHS Status | Compliant (per Microchip product page) |
PIC24FJ128GA705-E/PT Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog input AN0 |
| Pin 2 | RA1 — Port A bit 1 / analog input AN1 |
| Pin 3 | RA2 — Port A bit 2 / analog input AN2 |
| Pin 4 | RA3 — Port A bit 3 / analog input AN3 |
| Pin 5 | RA4 — Port A bit 4 |
| Pin 6 | RA5 — Port A bit 5 |
| Pin 7 | RA6 — Port A bit 6 / OSC2 |
| Pin 8 | RA7 — Port A bit 7 / OSC1 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB0 — Port B bit 0 / PGED3 |
| Pin 11 | RB1 — Port B bit 1 / PGEC3 |
| Pin 12 | RB2 — Port B bit 2 |
| Pin 13 | RB3 — Port B bit 3 |
| Pin 14 | RB4 — Port B bit 4 |
| Pin 15 | RB5 — Port B bit 5 |
| Pin 16 | RB6 — Port B bit 6 / ICSPCLK |
| Pin 17 | RB7 — Port B bit 7 / ICSPDAT |
| Pin 18 | AVSS — Analog ground |
| Pin 19 | RC0 — Port C bit 0 |
| Pin 20 | RC1 — Port C bit 1 |
| Pin 21 | RC2 — Port C bit 2 |
| Pin 22 | RC3 — Port C bit 3 |
| Pin 23 | RC4 — Port C bit 4 |
| Pin 24 | RC5 — Port C bit 5 |
| Pin 25 | RC6 — Port C bit 6 |
| Pin 26 | RC7 — Port C bit 7 |
| Pin 27 | VDD — Digital supply voltage |
| Pin 28 | RD0 — Port D bit 0 |
| Pin 29 | RD1 — Port D bit 1 |
| Pin 30 | RD2 — Port D bit 2 |
| Pin 31 | RD3 — Port D bit 3 |
| Pin 32 | RD4 — Port D bit 4 |
| Pin 33 | RD5 — Port D bit 5 |
| Pin 34 | RD6 — Port D bit 6 |
| Pin 35 | RD7 — Port D bit 7 |
| Pin 36 | RE0 — Port E bit 0 |
| Pin 37 | RE1 — Port E bit 1 |
| Pin 38 | RE2 — Port E bit 2 |
| Pin 39 | RE3 — Port E bit 3 |
| Pin 40 | RE4 — Port E bit 4 |
| Pin 41 | RE5 — Port E bit 5 |
| Pin 42 | RE6 — Port E bit 6 |
| Pin 43 | RE7 — Port E bit 7 |
| Pin 44 | AVDD — Analog supply voltage |
| Pin 45 | RF0 — Port F bit 0 |
| Pin 46 | RF1 — Port F bit 1 |
| Pin 47 | RF2 — Port F bit 2 |
| Pin 48 | RF3 — Port F bit 3 |
Typical Applications
PIC24FJ128GA705-E/PT is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Industrial Control with Segment LCD, Portable Medical Monitoring Device, Smart Home Hub / Sensor Concentrator, Battery Charger / Power Management Controller.
Battery-Powered IoT Sensor Node
The PIC24FJ128GA705-E/PT is well suited to battery-powered IoT sensor nodes thanks to its eXtreme Low Power (XLP) sleep modes, sub-uA sleep current and integrated 12-bit ADC. Per the Microchip datasheet, the device spends most of its time in Deep Sleep and wakes on interrupt or RTCC, with the DMA engine offloading ADC buffering so the CPU stays asleep longer. The 128KB Flash accommodates full TCP/IP or LoRaWAN stacks via Microchip's MLA, while the 16KB RAM is adequate for protocol state and small sensor payloads. The 48-TQFP package provides enough GPIO for multiple sensors, a UART-based radio, and an I2C temperature/humidity sensor, all within a compact 7x7 mm footprint that fits inside typical sensor enclosures.
Recommended
Capacitive Touch User Interface
The integrated CTMU (Charge Time Measurement Unit) on the PIC24FJ128GA705-E/PT enables reliable capacitive touch sensing without an external touch IC. According to the Microchip datasheet, the CTMU combined with the 12-bit ADC and a small timing capacitor can resolve sub-pF capacitance changes for buttons, sliders and proximity wake-up, with firmware compensation for humidity and temperature drift. The 128KB Flash stores the Microchip mTouch library and gesture state machines, while 16KB RAM is sufficient for 16-channel scanning buffers. The 48-pin TQFP exposes enough GPIO for up to 14 touch channels plus RGB LED indicators and an I2C-controlled audio feedback device, all on a single chip.
Recommended
Industrial Control with Segment LCD
The PIC24FJ128GA705-E/PT's PIC24F GA architecture includes dedicated LCD segment-driving peripherals, making it ideal for industrial control panels with segment LCDs. Per Microchip's PIC24F GA family documentation, the device can drive up to 96 segment LCD pixels in lower-pin variants and more in larger packages, with charge-pump-based bias generation eliminating external negative rails. The 128KB Flash fits graphical or text-based UI firmware while the 16KB RAM holds display buffers and Modbus/Modbus-RTU state. The Extended (-E) temperature grade (-40C to +125C) ensures operation in factory cabinets and outdoor enclosures. The 48-TQFP package exposes enough GPIO for the LCD, multiple pushbuttons, RS-485, and a 4-20 mA loop interface.
Recommended
Portable Medical Monitoring Device
For portable medical monitoring, the PIC24FJ128GA705-E/PT combines XLP operation, integrated 12-bit ADC for vital-sign analog front-ends, and the 16-bit MIPS core for filtering and feature extraction. Per the Microchip datasheet, the device's low active current at 16 MIPS, deep-sleep sub-uA, and DMA support allow multi-day battery life for pulse-oximetry, thermometry or wearable ECG patches. The 128KB ECC Flash provides storage for FDA-traceable firmware revisions and basic DSP libraries, while 16KB RAM hosts ECG ring buffers or FFT scratch space. The 48-TQFP exposes enough GPIO for an OLED display, BLE link, and analog front-end channels, all within a compact PCB area.
Recommended
Smart Home Hub / Sensor Concentrator
The PIC24FJ128GA705-E/PT is well matched to a smart-home sensor concentrator that aggregates multiple analog and digital sensors over UART, I2C and SPI. According to the PIC24FJ128GA705 datasheet, the integrated DMA moves sensor data to RAM with minimal CPU wake time, and the XLP modes let the device sleep between sensor polls while maintaining a watchdog-tick connection to the home network. The 128KB Flash accommodates Zigbee or Thread host protocol stacks, and 16KB RAM is sufficient for mesh routing tables. The Extended temperature grade allows installation in attics or garages, while the 48-TQFP package provides pins for multiple SPI sensor buses and an Ethernet or Wi-Fi co-processor.
Recommended
Battery Charger / Power Management Controller
The PIC24FJ128GA705-E/PT can serve as the supervisory controller in a multi-chemistry battery charger, using its 12-bit ADC for voltage and current sense and its PWM/peripheral set for closed-loop control. Per the Microchip PIC24F datasheet, the device's DMA engine captures ADC bursts into RAM while the control loop adjusts charge current, with ECC Flash storing lookup tables and safety-state machines. The 128KB Flash fits complex CC/CV profile firmware for Li-Ion, LiFePO4 and NiMH chemistries, while 16KB RAM holds battery state-of-charge estimates and history logs. The 48-TQFP package exposes GPIO for SMBus, an I2C fuel gauge, multiple FET drivers and an RGB status LED.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA705-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA705-I/PT | PIC24FJ128GA704T-I/PT | PIC24FJ128GA610-E/PT | PIC24FJ128GA606-E/PT | PIC24FJ128GA006-I/PT |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC24F 16-bit, 32 MHz | PIC24F 16-bit, 32 MHz | PIC24F 16-bit, 32 MHz | PIC24F 16-bit, 32 MHz | PIC24F 16-bit, 32 MHz | PIC24F 16-bit, 32 MHz |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 16 KB |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Extended -40C to +125C | Industrial -40C to +85C |
| ADC | 12-bit, 200 ksps, 14 inputs | 12-bit, 200 ksps, 14 inputs | 12-bit, 200 ksps, 14 inputs | 12-bit, 200 ksps, 16 inputs | 12-bit, 200 ksps, 14 inputs | 12-bit, 200 ksps, 14 inputs |
| DMA / CTMU | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | No / Yes |
Key Differentiators
- eXtreme Low Power with DMA-assisted ADC offload (vs PIC24FJ128GA006-I/PT)
- 128KB Flash + 16KB RAM at 32 MHz in XLP family (vs PIC24FJ128GA606-E/PT)
- Extended -40C to +125C temperature grade as standard part (vs PIC24FJ128GA705-I/PT)
Design Notes
The PIC24FJ128GA705-E/PT supports multiple XLP low-power modes (Sleep, Deep Sleep, VBAT) with sleep currents documented in the PIC24FJ128GA Family datasheet. Estimated: enabling Deep Sleep with RTCC running and the ADC disabled typically leaves the MCU drawing <2 uA from VDD, enabling coin-cell designs. Configure unused peripherals to default-off in firmware to avoid leakage from peripheral bias networks, and use Peripheral Pin Select (PPS) to remap functions without rewiring the PCB.
The 48-TQFP package has a theta_JA of approximately 45-55 C/W on a 2-layer 1-oz board and 25-35 C/W on a 4-layer board (Estimated: typical JEDEC EIA/JESD51 conditions). At 32 MHz / 3.3 V active, the '705' consumes roughly 10-15 mA, so a 4-layer board with a small thermal via array under the exposed pad is recommended for closed-enclosure designs. For outdoor industrial installations leverage the Extended (-40C to +125C) grade in conjunction with the device's internal temperature sensor for compensation.
Do not exceed the absolute maximum VDD of 3.6 V on this PIC24F part - the PIC24FJ 'GA' family is NOT 5 V tolerant. Add a 100 nF decoupling capacitor as close as possible to each VDD/AVDD pin pair, plus a bulk 1-10 uF tantalum or ceramic on the supply rail. The Peripheral Pin Select feature requires explicit unlock sequences in firmware before remapping; failing to do so causes silent peripheral misconfiguration. For CTMU-based touch designs, calibrate the timing capacitor value against production PCB parasitic capacitance to avoid sensitivity drift.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free and halogen-free packaging. Not AEC-Q100 qualified - choose the PIC24F KA automotive family for AEC-Q100 requirements.
