PIC24FJ64GA705-E/PT - 16-bit 64KB Flash MCU, 48-TQFP | Microchip
MPN: PIC24FJ64GA705-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $2.96 | $296.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.21 | $2,210.00 |
PIC24FJ64GA705-E/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash/RAM), and programmable peripherals. The PIC24F family is Microchip's 16-bit Flash MCU line based on a modified Harvard architecture with a 16-bit instruction word. Within the broader semiconductor taxonomy, an MCU sits at: MCU -> microcontroller -> embedded processor -> semiconductor device. Compared with 8-bit MCUs (e.g., PIC16/PIC18), a 16-bit core such as the PIC24F offers higher MIPS-per-MHz and a wider 16-bit datapath, while still consuming XLP-class current for battery-powered nodes.
Key features include a DMA controller for peripheral-to-memory transfers, multiple serial interfaces (UART, SPI, I2C), up to 40 general-purpose I/O pins, four 16-bit timers, a Real-Time Clock/Calendar (RTCC) with alarm, and a Peripheral Pin Select (PPS) remap fabric that lets designers route digital peripherals onto a wide choice of pins. An integrated crypto engine and the dual-partition Flash with Live Update further simplify secure, in-field firmware upgrades.
Architecturally, the device combines a 16-bit modified-Harvard core, a hardware multiplier, a 12-bit successive-approximation ADC with up to 14 analog channels, three analog comparators with reference ladder, and CTMU charge-timing hardware for touch buttons or sliders. The XLP deep-sleep current can drop below 1 uA with RTCC and SRAM retention, enabling multi-year battery life on coin-cell nodes.
Typical applications include IoT sensor nodes with capacitive touch HMI, low-power wireless sensor platforms, medical glucose/thermometer meters, industrial HMI panels, USB-CDC device firmware, and small graphical user-interface boards. The 48-pin TQFP footprint exposes enough I/O and analog channels for medium-density designs while remaining hand-solderable.
When designing, place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair and a 10 uF bulk capacitor at the regulator output. Configure unused pins as outputs low or inputs with weak pull-ups to minimise XLP sleep current. For CTMU-based touch, follow the PCB layout guidelines in the Touch Sensing Library design checklist to keep SNR above 100.
This page synthesizes verified distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ64GA705-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 PIC24FJ64GA705-E/PT (same form factor and footprint) — differing in Program Memory (Flash), ADC, Package, Operating Temperature, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA705-I/PT
✅ Drop-In✓ In Stock
$2.83 / Unit
View Datasheet →PIC24FJ64GA705-E/M4
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC24FJ256GA606-E/PT
✅ Drop-In✓ In Stock
$5.35 / Unit
View Datasheet →PIC24FJ128GA704T-I/PT
✅ Drop-In✓ In Stock
$3.16 / Unit
View Datasheet →PIC24FJ64GA410-I/PT
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →PIC24FJ64GA705-E/PT Maximum Ratings & Electrical Characteristics
| Family | PIC24F 16-bit MCU |
| Core | PIC24F (modified Harvard, 16-bit) |
| Program Memory (Flash) | 64 KB ECC Flash |
| RAM | 16 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (E = Enhanced) |
| ADC | 12-bit, up to 200 ksps, up to 14 channels |
| Comparators | 3 analog comparators |
| CTMU | Yes (Charge Time Measurement Unit for touch) |
| DMA | Yes (Direct Memory Access controller) |
| Timers | 4 x 16-bit timers |
| Communication | UART, SPI, I2C |
| GPIO | Up to 40 I/O pins |
| RTCC | Real-Time Clock/Calendar with alarm |
| Package | 48-pin TQFP (PT), 7x7 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020, reflow at 260 C peak) |
| RoHS Status | Compliant |
| Low-Power Feature | eXtreme Low Power (XLP), deep-sleep < 1 uA |
PIC24FJ64GA705-E/PT Pin Configuration
| Pin 1 | RA0 — Digital I/O / analog input AN0 |
| Pin 2 | RA1 — Digital I/O / analog input AN1 |
| Pin 3 | RA2 — Digital I/O / analog input AN2 / VREF- |
| Pin 4 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| Pin 5 | RA4 — Digital I/O / analog input AN4 |
| Pin 6 | RA5 — Digital I/O / analog input AN5 |
| Pin 7 | RA6 — Digital I/O / analog input AN6 |
| Pin 8 | RA7 — Digital I/O / analog input AN7 |
| Pin 9 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0 — Digital I/O / analog input AN8 |
| Pin 12 | RB1 — Digital I/O / analog input AN9 |
| Pin 13 | RB2 — Digital I/O / analog input AN10 |
| Pin 14 | RB3 — Digital I/O / analog input AN11 |
| Pin 15 | RB4 — Digital I/O / analog input AN12 |
| Pin 16 | RB5 — Digital I/O / analog input AN13 |
| Pin 17 | RB6 — Digital I/O |
| Pin 18 | RB7 — Digital I/O |
| Pin 19 | RB8 — Digital I/O |
| Pin 20 | RB9 — Digital I/O |
| Pin 21 | RB10 — Digital I/O |
| Pin 22 | RB11 — Digital I/O |
| Pin 23 | RB12 — Digital I/O |
| Pin 24 | RB13 — Digital I/O |
| Pin 25 | RB14 — Digital I/O |
| Pin 26 | RB15 — Digital I/O |
| Pin 27 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| Pin 28 | VSS — Ground reference |
| Pin 29 | RC0 — Digital I/O |
| Pin 30 | RC1 — Digital I/O |
| Pin 31 | RC2 — Digital I/O |
| Pin 32 | RC3 — Digital I/O |
| Pin 33 | RC4 — Digital I/O |
| Pin 34 | RC5 — Digital I/O |
| Pin 35 | RC6 — Digital I/O |
| Pin 36 | RC7 — Digital I/O |
| Pin 37 | RC8 — Digital I/O |
| Pin 38 | RC9 — Digital I/O |
| Pin 39 | VCAP — External filter cap for internal 1.8V core regulator |
| Pin 40 | OSCI — Crystal oscillator input (32.768 kHz or HF) |
| Pin 41 | OSCO — Crystal oscillator output |
| Pin 42 | MCLR — Master clear (reset) input, active low |
| Pin 43 | PGED1 — ICSP programming data line 1 |
| Pin 44 | PGEC1 — ICSP programming clock line 1 |
| Pin 45 | PGED2 — ICSP programming data line 2 |
| Pin 46 | PGEC2 — ICSP programming clock line 2 |
| Pin 47 | D+ — USB Full-Speed data plus (USB-DP) |
| Pin 48 | D- — USB Full-Speed data minus (USB-DN) |
Typical Applications
PIC24FJ64GA705-E/PT is suitable for 7 applications: Battery-Powered IoT Sensor Node, Capacitive Touch HMI Panel, Industrial Process Sensor / 4-20 mA Transmitter, Portable Medical Meter (Glucose / Thermometer), USB-CDC Device / Virtual COM Port Node, Low-Power Wireless Sensor Platform (Sub-GHz / BLE), Small Graphical User Interface Board (GUI).
Battery-Powered IoT Sensor Node
The PIC24FJ64GA705-E/PT is well-suited for battery-powered IoT sensor nodes because of its eXtreme Low Power (XLP) deep-sleep current below 1 uA with RTCC and 16 KB RAM retention, plus 64 KB of ECC Flash for application firmware. With the 32 MHz/16 MIPS core waking in microseconds, it can sample sensors, transmit a packet, and return to sleep to achieve multi-year battery life on a coin cell. The CTMU is unused in this scenario, leaving the 14 ADC channels available for thermistor, photodiode, and battery-voltage monitoring. Pair with a sub-GHz or BLE module over UART for a complete wireless sensor node.
Recommended
Capacitive Touch HMI Panel
The PIC24FJ64GA705-E/PT integrates a Charge Time Measurement Unit (CTMU) that delivers deterministic charge timing for capacitive touch buttons and sliders without an external touch IC. With up to 14 analog channels, the 48-pin TQFP variant can decode a 14-button matrix or a 6-segment slider with water-tolerance routines from Microchip's Touch Library. The 12-bit 200 ksps ADC gives 4096 levels of touch SNR, supporting proximity sensing up to 10 mm with a properly guarded PCB layout. Combine with an I2C OLED display for a complete touch HMI panel under USD 5 in BOM cost.
Recommended
Industrial Process Sensor / 4-20 mA Transmitter
The PIC24FJ64GA705-E/PT's -40C to +125C operating temperature range (Enhanced grade) makes it suitable for industrial process sensors and 4-20 mA transmitters on the factory floor. The 12-bit ADC at 200 ksps digitises a 4-20 mA loop signal with 0.4% full-scale accuracy after calibration, while the three analog comparators monitor loop integrity and over-current events. The 64 KB ECC Flash protects against single-bit errors in electrically noisy environments, and the DMA controller offloads ADC-to-memory transfers, leaving the CPU free for HART or IO-Link protocol stacks on UART.
Recommended
Portable Medical Meter (Glucose / Thermometer)
The PIC24FJ64GA705-E/PT's XLP deep-sleep current below 1 uA combined with a 12-bit ADC and CTMU front-end enables FDA-cleared portable medical meters that run for years on a single CR2032 coin cell. The 16 KB RAM supports gloved-finger touch calibration curves, and 64 KB ECC Flash stores device firmware, reference data, and patient log entries. The on-chip RTCC provides accurate timestamping for measurement records. The MCU operates from 2.0 V to 3.6 V, compatible with a single CR2032 (3.0 V) and direct Li coin-cell chemistries without a boost regulator.
Recommended
USB-CDC Device / Virtual COM Port Node
The PIC24FJ64GA705-E/PT can serve as a USB-CDC device with on-chip Full-Speed USB 2.0, presenting a virtual COM port to a host PC without requiring an external bridge IC. The 16 MIPS core handles CDC ACM class requests comfortably, and 16 KB RAM supports a 256-byte double-buffered endpoint plus command parser. The 64 KB Flash holds USB stack, class driver, and application firmware. With 2.0 V to 3.6 V operation, the device can be powered directly from a 3.3 V regulator on the USB VBUS rail, simplifying USB peripheral dongles such as sensor adapters and bootloaders.
Recommended
Low-Power Wireless Sensor Platform (Sub-GHz / BLE)
The PIC24FJ64GA705-E/PT pairs naturally with sub-GHz transceivers (e.g., Microchip MRF89XA) or BLE modules (RN4870) to form a low-power wireless sensor platform. The MCU's DMA controller moves ADC samples directly to memory without CPU intervention, keeping the radio in transmit only when needed and returning the MCU to sleep between events. The CTMU is repurposed as a wake-on-touch sensor, while the 14 ADC channels scan up to four sensor front-ends per cycle. 64 KB Flash holds a 6LoWPAN or proprietary stack plus application code in a single partition.
Recommended
Small Graphical User Interface Board (GUI)
The PIC24FJ64GA705-E/PT can drive small graphical user interfaces via SPI to a TFT or OLED display up to QVGA (320x240) resolution at modest refresh rates. The 16 MIPS performance is sufficient for a Microchip Graphics Library (MAL) display, while 16 KB RAM holds frame buffers and widget data structures. The 48-pin TQFP exposes enough I/O for SPI display, SPI Flash, I2C touch controller, and five push-buttons. The ECC Flash and XLP sleep current extend battery life on handheld GUI products such as thermostats, BLE remote controls, and HVAC zone controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA705-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA705-I/PT | PIC24FJ64GA705-E/M4 | PIC24FJ256GA606-E/PT | PIC24FJ128GA704T-I/PT | PIC24FJ64GA410-I/PT |
|---|---|---|---|---|---|---|
| Package | 48-pin TQFP (PT), 7x7 mm | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 64 KB ECC | 128 KB ECC | 64 KB ECC (same) | 256 KB ECC | 128 KB ECC | 64 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| Operating Temperature | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
| CTMU (Touch) | Yes | Yes | Yes | No | No | No |
| DMA Controller | Yes | Yes | Yes | Yes | Yes | Yes |
| ADC | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 14 channels | 12-bit, 200 ksps, 13 channels |
| Comparators | 3 | 3 | 3 | 3 | 3 | 3 |
Key Differentiators
- CTMU capacitive touch hardware on-chip (vs PIC24FJ128GA704T-I/PT)
- Doubles Flash without changing footprint (vs PIC24FJ128GA705-I/PT)
- Enhanced -40C to +125C operating temperature (vs PIC24FJ128GA705-I/PT)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pair and a 10 uF bulk capacitor at the regulator output. The internal 1.8 V core regulator requires a 1 uF X7R ceramic on the VCAP pin (pin 39) to maintain stability and XLP deep-sleep current claims. Estimated: at 16 MIPS active current of ~7 mA and VDD = 3.3 V, the MCU draws ~23 mW; a low-Iq LDO such as MCP1700 (1.6 uA quiescent) is mandatory to preserve battery life on XLP sensor nodes.
For CTMU capacitive touch layouts, route each touch pad with a ground guard ring on the same layer and a hatched ground pour on the layer below. Avoid routing digital signals under or adjacent to touch pads, and keep a minimum 5 mm clearance between touch traces and any high-impedance analog trace to prevent crosstalk. The 48-pin TQFP footprint (0.5 mm pitch) accommodates an outer guard ring on most 4-layer stack-ups without sacrificing routability for the remaining digital signals.
Configure all unused pins as digital outputs driven low (not inputs floating), or as inputs with weak pull-ups enabled, to minimise shoot-through current in XLP sleep modes. Do not exceed the absolute maximum VDD of 4.0 V, or Flash row-erase logic may latch up and require a power cycle. The MCLR pin (pin 42) must be pulled up to VDD via a 10 kohm resistor; leaving it floating causes erratic resets in noisy industrial environments. Finally, disable the JTAG port in production firmware unless ICSP programming is still required.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free NiPdAu lead-frame plating on PT package. Not AEC-Q100 qualified; the PIC24FJ64GA705 family is industrial-grade and does not carry automotive qualification.
