PIC24FJ64GA705-I/PT - 16-bit 32MHz MCU 64KB Flash 48-TQFP
MPN: PIC24FJ64GA705-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $3.07 | $307.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.41 | $2,410.00 |
PIC24FJ64GA705-I/PT Overview
A 16-bit microcontroller (MCU) is an embedded processor whose data path is 16 bits wide, providing higher arithmetic precision and richer peripheral integration than 8-bit parts while consuming less power than 32-bit Cortex-M devices in many real-time control applications. Within the broader semiconductor taxonomy, a 16-bit MCU sits between low-end 8-bit MCUs and mid-range 32-bit MCUs, and the PIC24F architecture is widely deployed in general-purpose embedded control, sensor interfacing, and human-machine-interface (HMI) designs. The PIC24FJ64GA705 family is offered in 28-, 44-, and 48-pin variants, allowing a single firmware base to scale across board sizes.
Key features of the PIC24FJ64GA705-I/PT include 64KB (22K x 24 instruction words) self-programmable Flash with ECC, 8KB SRAM, a 16-bit timer/counter bank, two I2C, two SPI, and up to three UART interfaces, plus a Parallel Master Port (PMP) for graphics or external memory expansion. The 12-bit ADC with 200 ksps throughput supports up to 14 channels, and three comparators with programmable reference generation are usable for analog event detection. A Direct Memory Access (DMA) controller with up to four channels offloads data movement between peripherals and RAM, freeing the CPU for application code.
The device operates from 2.0V to 3.6V and is rated for industrial temperatures of -40C to +85C. It supports 5V-tolerant digital inputs on selected pins, easing interfacing to legacy 5V logic. On-chip debugging and programming are available through Microchip's standard ICSP/ICD interfaces, and the part is supported by MPLAB X IDE, XC16 compiler, and MPLAB Code Configurator (MCC) for rapid peripheral initialization.
Typical applications include low-power IoT sensor nodes, capacitive-touch user interfaces, portable medical instrumentation, building automation controllers, and consumer HMI panels. The combination of eXtreme Low Power modes and CTMU makes the part especially suitable for battery-powered touch-button or slider designs.
When designing with this MCU, allocate one of the 48 pins to MCLR if in-system programming is required, and respect the analog and digital pinout separation documented in the datasheet. For capacitive touch, route CTMU pins with short, guarded traces and use the recommended touch library from Microchip.
This page synthesizes distributor pricing, same-brand TQFP-48 drop-in alternatives, and practical design notes not consolidated on the manufacturer datasheet landing page.
Drop-in alternatives for PIC24FJ64GA705-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 PIC24FJ64GA705-I/PT (same form factor and footprint) — differing in Package, Program Memory (Flash), Operating Temperature, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA705-I/PT
✅ Drop-In✓ In Stock
$2.83 / Unit
View Datasheet →PIC24FJ256GA705-I/M4
✅ Drop-In✓ In Stock
$3.55 / 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 →PIC24FJ256GA110T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ64GA705-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| Family | PIC24FJ64GA705 (eXtreme Low Power) |
| Program Memory (Flash) | 64 KB (22K x 24 instructions), ECC |
| Data Memory (SRAM) | 8 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial, -I suffix) |
| ADC | 12-bit, up to 200 ksps, up to 14 channels |
| Comparators | 3 (with programmable reference) |
| CTMU | Charge Time Measurement Unit (touch / time measurement) |
| DMA Channels | 4 |
| Communication Interfaces | 2x I2C, 2x SPI, up to 3x UART |
| Parallel Master Port (PMP) | Yes |
| Timers | Multiple 16-bit timer/counter modules |
| Package | 48-pin TQFP (PT) 7x7 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Programming/Debug | ICSP and ICD via MPLAB |
PIC24FJ64GA705-I/PT 48-pin tqfp (pt) 7x7 mm Pin Configuration Guide
Pin configuration for PIC24FJ64GA705-I/PT (48-pin tqfp (pt) 7x7 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 PIC24FJ64GA705-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24FJ64GA705-I/PT is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Industrial Control / Building Automation, Portable Medical / Health Monitoring, Consumer HMI / Small Display Controller, Low-Power Data Acquisition / Sensor Hub.
Battery-Powered IoT Sensor Node
The PIC24FJ64GA705-I/PT's eXtreme Low Power core with sub-microamp sleep currents and 32 MHz active performance makes it an ideal host for battery-powered IoT sensor nodes. The integrated 12-bit ADC at 200 ksps samples analog sensors directly, the DMA controller offloads data movement, and UART/I2C/SPI peripherals connect radios or sensors. The 48-pin TQFP package provides enough I/O to support multiple analog channels and a low-power radio module while remaining hand-solderable for prototyping. Compared to 32-bit Cortex-M0+ alternatives, the PIC24F typically delivers better active-mA/MIPS efficiency for periodic sensor reads followed by deep sleep.
Recommended
Capacitive Touch User Interface
The on-chip Charge Time Measurement Unit (CTMU) gives the PIC24FJ64GA705-I/PT native hardware support for capacitive touch buttons, sliders, and proximity sensors. Microchip's mTouch touch library supports PCB-electrode designs directly without an external touch IC, reducing BOM cost and board area. The 14-channel ADC complements the touch subsystem by monitoring supply voltage, backlight current, or other analog housekeeping signals. With 64KB Flash, designers can store button-tuning parameters, gesture libraries, and a USB HID or I2C host interface in a single chip, and the 48-pin TQFP leaves ample I/O for LEDs, haptics, and a small TFT display.
Recommended
Industrial Control / Building Automation
Industrial and building-automation controllers demand deterministic 16-bit performance, robust peripherals, and an industrial temperature rating - all delivered by the PIC24FJ64GA705-I/PT with its -40 C to +85 C operating range. The 12-bit ADC and three comparators handle analog sensor inputs such as temperature, pressure, and 4-20 mA loop interfaces, while the UART channels support RS-485 transceivers for Modbus or BACnet fieldbus connectivity. The Parallel Master Port (PMP) enables connection to small character or graphical LCDs for local HMI. Compared with 8-bit PIC16 alternatives, the 16 MIPS throughput allows simultaneous sensor scanning, communication stack processing, and HMI updates without dropping cycles.
Recommended
Portable Medical / Health Monitoring
Portable medical and health-monitoring devices require low power consumption, accurate analog measurement, and reliable embedded control - a profile well matched by the PIC24FJ64GA705-I/PT. The 12-bit ADC at 200 ksps digitizes signals from pulse oximeter photodiodes, thermocouples, or weight-scale load cells, while the DMA engine reduces CPU load during continuous acquisition. The eXtreme Low Power sleep modes stretch battery life on wearable form factors, and the CTMU can be repurposed for body-impedance measurements. Note that medical designs typically require additional IEC 60601-1 system-level qualification, but the MCU's low-noise analog and deterministic interrupt latency simplify subsystem compliance.
Recommended
Consumer HMI / Small Display Controller
The PIC24FJ64GA705-I/PT's Parallel Master Port (PMP) and 64KB Flash make it a cost-effective host for small TFT or character-LCD user interfaces in consumer appliances. The CTMU and ADC monitor front-panel capacitive touch, the UART/SPI peripherals connect to Wi-Fi or Bluetooth modules for cloud connectivity, and the 32 MHz core provides enough throughput to refresh a small QVGA display while handling control logic. The 48-pin TQFP exposes sufficient GPIO for LED indicators, keypads, and motor-control PWM channels, while keeping the package hand-solderable for low-volume appliance production.
Recommended
Low-Power Data Acquisition / Sensor Hub
With 64KB ECC Flash, 8KB SRAM, and four DMA channels, the PIC24FJ64GA705-I/PT serves as a low-power data-acquisition hub that aggregates multiple analog and digital sensors, buffers samples, and forwards them over UART/SPI to a host processor. The 12-bit ADC with 14 channels scans sensor arrays, the comparators generate hardware triggers for time-critical events, and the CTMU supports accurate time-stamping of measurements. Compared to using a 32-bit Cortex-M0+ at the same MIPS rating, the PIC24F typically draws less active current, making the design suitable for solar- or energy-harvest-powered remote monitoring stations.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA705-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA705-I/PT | PIC24FJ256GA705-I/M4 | PIC24FJ128GA704T-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) |
| Program Flash | 64 KB | 128 KB | 256 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Max CPU Speed | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) | 32 MHz (16 MIPS) |
| 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 |
| ADC | 12-bit, up to 14 channels | 12-bit, up to 14 channels | 12-bit, up to 14 channels | 12-bit, up to 13 channels |
| CTMU Touch Support | Yes | Yes | Yes | Yes |
| Industrial Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Highest-density drop-in upgrade within the GA705 die family at 48-pin TQFP (vs PIC24FJ128GA705-I/PT)
- eXtreme Low Power core outperforms general-purpose PIC24F GP parts in battery applications (vs PIC24FJ64GP205-I/PT)
- On-chip CTMU eliminates external touch ICs (vs PIC24FJ64GA702-I/MV)
Design Notes
Estimated: with VDD = 3.3V, CPU active at 32 MHz, all peripherals off, typical active current is around 8 mA and deep-sleep current drops below 1 uA. To maximize battery life, use Sleep mode between ADC conversions, drive unused pins as outputs low, and disable unused peripherals via the PMD registers. Always place a 0.1 uF decoupling capacitor as close as possible to each VDD/AVDD pin and a 10 uF bulk capacitor near the MCU. For ADC accuracy, add a ferrite bead between VDD and AVDD and decouple AVDD with 0.1 uF + 10 uF.
Allocate one pin as MCLR for in-system programming and debugging; do NOT tie MCLR directly to VDD without a pull-up or you will lose ICSP. Keep the ICSP clock and data traces short and away from switching signals. For CTMU touch electrodes, route the touch pin traces with a ground guard ring on both sides and keep them short (<50 mm) for stable capacitance readings. Maintain a continuous ground plane under the device for thermal dissipation and EMI suppression.
Do NOT confuse the -I/PT (industrial -40 C to +85 C, TQFP-48) suffix with -E/PT (extended -40 C to +125 C, TQFP-48) - both share the same TQFP-48 footprint but the E-grade runs hotter. Avoid leaving unused analog pins floating; tie them to either AVSS or AVDD to prevent shoot-through current in the ADC mux. When migrating from PIC24FJ64GA004 firmware, verify the 48-pin pinout differences - the GA705 adds pins for PMP and additional ADC channels that the GA004 does not have.
Compliance Information
RoHS-compliant per Microchip product page. Industrial temperature grade -I supports -40 C to +85 C. For -40 C to +125 C extended range, order PIC24FJ64GA705-E/PT. AEC-Q100 qualification status is not published for this part - choose PIC24FJ64GA705-E/PT for automotive-style environmental profiles.
