PIC24FJ64GA705T-I/M4 - 16-bit 32MHz MCU 64KB Flash 48-UQFN | Microchip
MPN: PIC24FJ64GA705T-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.27 | $3.27 |
| 10 | $2.94 | $29.40 |
| 100 | $2.61 | $261.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC24FJ64GA705T-I/M4 Overview
A PIC24F microcontroller is a 16-bit modified Harvard architecture MCU from Microchip's PIC24 family, sitting between the 8-bit PIC16/PIC18 line and the 32-bit PIC32MX/dsPIC families. The PIC24FJ series emphasizes low power consumption and high peripheral integration for battery-powered and energy-harvesting designs. The 'GA705' family integrates USB-ready peripherals, 12-bit ADC, CTMU capacitive touch hardware, and DMA, enabling single-chip implementation of mixed-signal and human-interface products.
Key features of the PIC24FJ64GA705T-I/M4 include 64 KB Flash (22K x 24 instructions with ECC), 16 KB RAM, a 12-bit 200 ksps ADC with up to 14 analog channels, 3 analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch, DMA, and multiple communication peripherals including I2C, SPI, and UART. The 32 MHz core delivers up to 16 MIPS instruction throughput. On-chip peripherals include RTCC, PWMs, and configurable logic cells, with deep sleep currents in the nanoAmp range when XLP modes are enabled.
Architecturally the device uses a 16-bit modified Harvard CPU with separate program and data buses, hardware multiply/divide, and a vectored interrupt controller. ECC-protected Flash prevents single-bit corruption and supports robust firmware updates. The 48-UQFN package has a thermal pad that doubles as an additional ground connection and reduces junction-to-PCB thermal resistance.
Typical applications include capacitive touch human-interface panels, IoT sensor nodes, USB HID peripherals, battery-powered industrial sensor transmitters, and consumer electronics with segmented displays. The wide peripheral set reduces external component count. Designers should consult the MPLAB X IDE and the Microchip code configurator (MCC) to leverage the DMA-driven peripheral libraries for rapid firmware development.
Drop-in alternatives for PIC24FJ64GA705T-I/M4 — 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 PIC24FJ64GA705T-I/M4 (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ64GA705-I/M4
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC24FJ64GA705T-I/M4 Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit modified Harvard |
| CPU Core | PIC24F MIPS |
| Maximum CPU Frequency | 32 MHz |
| Performance | 16 MIPS |
| Program Flash Memory | 64 KB (22K x 24 instructions) |
| Flash ECC | Yes (single-bit correction) |
| SRAM | 16 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| ADC | 12-bit, 200 ksps, up to 14 channels |
| Comparators | 3 analog comparators |
| CTMU | Yes (Charge Time Measurement Unit for touch) |
| DMA | Yes |
| Communication Peripherals | I2C, SPI, UART |
| Timers/PWM | Multiple 16-bit timers and PWM outputs |
| Operating Temperature | -40C to +85C (Industrial, 'I') |
| Package | 48-UQFN (M4) 6x6 mm |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Low-Power Technology | eXtreme Low Power (XLP) with nanoWatt sleep modes |
PIC24FJ64GA705T-I/M4 48-uqfn (m4) 6x6 mm Pin Configuration Guide
Pin configuration for PIC24FJ64GA705T-I/M4 (48-uqfn (m4) 6x6 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC24FJ64GA705T-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ64GA705T-I/M4 is suitable for 7 applications: Capacitive Touch User Interface, Battery-Powered IoT Sensor Node, Industrial Sensor Transmitter, USB HID Peripheral Device, Home Appliance Control Board, Wearable Health Monitoring Device, HVAC Climate Sensor Module.
Capacitive Touch User Interface
The PIC24FJ64GA705T-I/M4's integrated CTMU (Charge Time Measurement Unit) combined with the 12-bit 200 ksps ADC makes it ideal for driving touch-button, slider, and proximity-sensor user interfaces. The CTMU provides constant-current source biasing for capacitive elements, while the ADC measures charge/discharge timing for sub-pF resolution. With 16 MIPS performance, the MCU can simultaneously scan up to 14 touch channels, debounce, and update display feedback. Compared to dedicated touch ICs, this single-chip approach eliminates the host MCU-to-touch-controller I2C/SPI link, reducing BOM cost by $0.30-$0.50 and freeing board space. The 64 KB Flash accommodates full USB-HID stacks, gesture libraries, and configurable firmware for white-goods, automotive interior controls, and industrial HMIs.
Recommended
Battery-Powered IoT Sensor Node
The PIC24FJ64GA705T-I/M4 is engineered for eXtreme Low Power (XLP) operation, achieving deep-sleep currents in the nanoAmp range and active currents under 1 mA/MIPS. With 2.0-3.6 V operation, the device runs directly from a single Li-ion cell (3.0-4.2 V with LDO) or two AA cells (2.0-3.2 V direct). The 16 KB SRAM supports sensor buffering, while the 64 KB Flash stores MQTT-SN or proprietary IoT protocol stacks. The 16 MIPS core handles AES-128 encryption, sensor fusion, and over-the-air updates within tight power budgets. Wake-on-touch, RTC alarm, and external interrupt sources enable duty cycling below 1% for multi-year battery life in environmental, agricultural, and structural-health-monitoring deployments.
Recommended
Industrial Sensor Transmitter
The PIC24FJ64GA705T-I/M4's -40C to +85C industrial temperature range, 12-bit 200 ksps ADC, and 3 analog comparators suit 4-20 mA loop-powered sensor transmitters for pressure, temperature, flow, and level measurement. The integrated DMA offloads continuous ADC sampling without CPU intervention, freeing the 16 MIPS core for linearization, compensation algorithms, and HART or IO-Link protocol stacks. The 48-UQFN 6x6 mm footprint fits inside compact field-mount enclosures, and the XLP sleep mode draws <100 nA between measurements for intrinsically safe installations. Pairing the MCU with a precision op-amp reference enables 0.1% F.S. accuracy over industrial temperature spans typical of process-control transmitter designs.
Recommended
USB HID Peripheral Device
The PIC24FJ64GA705T-I/M4 supports USB 2.0 full-speed device operation through its integrated USB peripheral and dedicated clock domain. The 16 MIPS core implements HID-class descriptors for keyboards, mice, game controllers, and custom human-interface devices without an external hub IC. The 64 KB Flash accommodates HID report descriptors, firmware update bootloaders, and composite-device stacks, while the 16 KB SRAM buffers HID reports at the USB 1 ms polling interval. Compared to discrete USB-to-UART bridges, this MCU eliminates an external crystal in many configurations and provides 12 GPIOs for button scanning, LED PWM, and rotary encoder decoding.
Recommended
Home Appliance Control Board
The PIC24FJ64GA705T-I/M4 combines the peripherals required for modern home appliances on a single die: 12-bit ADC for temperature and humidity sensing, PWM outputs for motor/valve control, timers for user-input debouncing, and CTMU for capacitive touch panels on washing machines, induction cooktops, and HVAC thermostats. With 64 KB Flash and 16 KB RAM, the MCU runs main control loops, displays driver firmware, and safety-monitoring routines concurrently. The wide 2.0-3.6 V supply tolerates rectified mains-derived rails, while the -40C to +85C range covers the full appliance thermal envelope including compressor-adjacent electronics in refrigerators and ovens.
Recommended
Wearable Health Monitoring Device
The PIC24FJ64GA705T-I/M4's XLP nanoWatt sleep modes and 16 MIPS performance balance multi-day battery life with the computational needs of wearable health monitors. The 12-bit ADC interfaces with optical heart-rate, SpO2, and galvanic skin-response sensors, while the CTMU enables touch/wake-on-wrist detection. With 64 KB Flash storing firmware plus user profiles, and 16 KB RAM buffering sample windows, the MCU fits heart-rate, step-count, and sleep-stage algorithms in a wristwatch form factor. The 48-UQFN 6x6 mm package sits beneath the watch PCB under the display, and the 2.0-3.6 V range works directly from Li-poly cells without boosting converters.
Recommended
HVAC Climate Sensor Module
The PIC24FJ64GA705T-I/M4 supports HVAC climate and air-quality sensor modules through its 12-bit ADC (200 ksps) paired with the DMA controller for continuous multi-channel sampling of temperature, humidity, VOC, and CO2 sensors. The 16 MIPS core runs compensation algorithms, linearizes sensor outputs, and drives PWM outputs for damper actuators. The XLP nanoWatt sleep modes extend battery life in wireless thermostat variants, while the 2.0-3.6 V supply accommodates 24 VAC wall-power-derived rails with a small buck regulator. The 48-UQFN package mounts flush to the back of wall plates for slim thermostat designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA705T-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ64GA705-I/M4 | PIC24FJ128GA705-I/PT |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-UQFN (M4) 6x6 mm | 48-UQFN (M4) 6x6 mm - same | TQFP-64 (PT) - different footprint |
| Core | PIC24F 16-bit | PIC24F 16-bit | PIC24F 16-bit |
| Maximum Frequency | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| Flash Memory | 64 KB | 64 KB | 128 KB (+100%) |
| SRAM | 16 KB | 16 KB | 16 KB |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| ADC | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels |
| CTMU Touch | Yes | Yes | Yes |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Higher Flash density in same family (vs PIC24FJ128GA705-I/PT)
- Lower unit cost and tighter package (vs PIC24FJ64GA705-I/M4)
- Compact 6x6 mm footprint (vs PIC24FJ128GA705-I/PT)
Design Notes
The PIC24FJ64GA705T-I/M4 supports multiple XLP sleep modes (sleep, deep sleep, and ultra-low-power wait). For battery-powered designs, configure the MCU to enter deep sleep between sensor events and use the RTCC alarm, CTMU wake, or external interrupt to resume operation. Estimated: at 3.3 V supply with deep-sleep current of ~20 nA, a single CR2032 coin cell (220 mAh) can power the MCU for over 1000 years in deep sleep, demonstrating the effectiveness of proper sleep-mode utilization. Always place a 0.1 uF decoupling capacitor close to each VDD pin and a bulk 10 uF tantalum or ceramic on the main supply rail.
The 48-UQFN package has a center exposed thermal pad that must be soldered to a continuous ground plane on the PCB to provide both electrical grounding and thermal dissipation. Microchip's UQFN PCB layout guidelines recommend at least 8 thermal vias in the EP pad connecting to inner ground planes for optimal heat spreading. Estimate: thermal vias on a 1 oz copper plane reduce junction-to-ambient thermal resistance by 30-40% versus no vias, important for designs running near maximum MIPS at high ambient temperature.
When migrating firmware between PIC24FJ64GA705T-I/M4 (48-UQFN) and PIC24FJ128GA705-I/PT (64-TQFP), verify peripheral pin mappings - the larger TQFP exposes more I/O ports (RD, RE) that do not exist on the 48-UQFN. Lock bits must be configured before production deployment to prevent accidental firmware readback via ICSP. Always configure unused I/O pins as digital outputs (not inputs) to avoid floating-pin current draw that can add several microamps to quiescent consumption and degrade sleep-mode performance.
Compliance Information
RoHS and REACH compliant per Microchip product page. The I suffix denotes industrial temperature grade (-40C to +85C); AEC-Q100 qualification is not applicable for this part - use automotive-graded variants if required.
