PIC24FJ64GA702T-I/ML - 16-bit 32MHz 64KB Flash MCU 28-QFN | Microchip
MPN: PIC24FJ64GA702T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC24FJ64GA702T-I/ML Overview
A 16-bit PIC microcontroller is a microcontroller based on Microchip's enhanced PIC24F architecture, which uses a modified Harvard bus with a 16-bit data path and 24-bit instruction word. It sits between 8-bit PIC16/PIC18 MCUs and 32-bit PIC32 devices in Microchip's product hierarchy: PIC24F -> PIC24 16-bit MCU -> microcontroller -> embedded processor. This class of MCU typically integrates analog peripherals, multiple communication interfaces and low-power sleep modes that 8-bit predecessors cannot deliver at equivalent clock speeds.
Key features include a 12-bit ADC at up to 200 ksps with up to 14 analog channels, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch and mTouch sensing, and a hardware Real-Time Clock and Calendar (RTCC) with alarm. Peripherals include multiple UART, SPI and I2C ports, five 16-bit timers and a 32-bit capable peripheral engine. The 28-QFN footprint provides 21 general-purpose I/O pins and supports surface-mount reflow assembly. eXtreme Low Power modes such as Sleep, Deep Sleep and Retention reduce quiescent current to single-digit microamperes for battery applications.
Typical applications for the PIC24FJ64GA702T-I/ML include low-power consumer products, capacitive-touch human-machine interfaces, portable medical peripherals, sensor hubs and small appliances where 16-bit performance, on-chip touch and low quiescent current are simultaneously required. The 64 KB Flash supports moderate-sized application code plus a USB-less bootloader. Industrial 24V systems can power the device through a 3.3V LDO such as the MCP1700.
When designing with this part, allocate the exposed pad (EP) to a continuous copper ground pour for both thermal dissipation and electrical grounding. Decouple VDD/AVDD pairs with at least 100 nF plus 1 uF ceramics placed within 3 mm of the pins. Configure unused I/O as outputs low to minimize Sleep current. JTAG/ICSP programming uses PGECx/PGEDx pins reserved from the I/O pool.
This page synthesizes distributor pricing, drop-in package equivalents, and practical design notes not found in the standalone datasheet, accelerating PIC24FJ64GA702T-I/ML selection for general-purpose embedded designs.
Drop-in alternatives for PIC24FJ64GA702T-I/ML — 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 PIC24FJ64GA702T-I/ML (same form factor and footprint) — differing in ADC, Package, Core Architecture, Timers, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA702T-I/ML
✅ Drop-In✓ In Stock
$2.62 / Unit
View Datasheet →PIC24FJ64GA702-I/ML
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →PIC24FJ64GA702-I/MV
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC24FJ64GA702T-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
dsPIC33EP32GP502-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GB202-I/MM
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC24FJ64GA702T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F (16-bit modified Harvard) |
| CPU Core / Family | PIC PIC 24F |
| Max CPU Speed | 32 MHz (16 MIPS) |
| Program Flash Memory | 64 KB (22K x 24 words) ECC |
| RAM | 8 KB |
| Operating Voltage Range | 2.0 V to 3.6 V |
| ADC | 12-bit, up to 200 ksps |
| Number of ADC Channels | up to 14 |
| Comparators | 3 |
| CTMU (Capacitive Touch) | Yes (mTouch) |
| RTCC (Real-Time Clock/Calendar) | Yes, with alarm |
| Timers | 5 x 16-bit |
| Communication Interfaces | UART, SPI, I2C |
| I/O Pins | 21 |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-pin QFN (6 x 6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC24FJ64GA702T-I/ML Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active-low |
| Pin 2 | RA0 — Port A bit 0 / AN0 / CVREF+ |
| Pin 3 | RA1 — Port A bit 1 / AN1 / CVREF- |
| Pin 4 | PGEC1 — ICSP programming clock |
| Pin 5 | PGED1 — ICSP programming data |
| Pin 6 | RA2 — Port A bit 2 / AN2 |
| Pin 7 | VSS — Digital ground |
| Pin 8 | VDD — Digital supply voltage 2.0-3.6 V |
| Pin 9 | RA3 — Port A bit 3 / AN3 |
| Pin 10 | OSC2 — Crystal oscillator output |
| Pin 11 | OSC1 — Crystal oscillator input |
| Pin 12 | AVSS — Analog ground |
| Pin 13 | AVDD — Analog supply voltage |
| Pin 14 | RB0 — Port B bit 0 / AN4 / CTMU input |
| Pin 15 | RB1 — Port B bit 1 / AN5 / CTMU input |
| Pin 16 | RB2 — Port B bit 2 / AN6 / CTMU input |
| Pin 17 | RB3 — Port B bit 3 / AN7 / CTMU input |
| Pin 18 | RB4 — Port B bit 4 / AN8 / CTMU input |
| Pin 19 | VDD — Digital supply voltage 2.0-3.6 V (second pin) |
| Pin 20 | VSS — Digital ground (second pin) |
| Pin 21 | RB5 — Port B bit 5 / AN9 / CTMU input |
| Pin 22 | RB6 — Port B bit 6 / AN10 / CTMU input |
| Pin 23 | RB7 — Port B bit 7 / AN11 / CTMU input |
| Pin 24 | RB8 — Port B bit 8 / AN12 |
| Pin 25 | RB9 — Port B bit 9 / AN13 |
| Pin 26 | RB10 — Port B bit 10 |
| Pin 27 | RB11 — Port B bit 11 |
| Pin 28 | RA4 — Port A bit 4 |
| Pin 29 | EP — Exposed pad - thermal/ground connection |
Typical Applications
PIC24FJ64GA702T-I/ML is suitable for 6 applications: Low-Power IoT Sensor Hubs, Capacitive Touch HMI Panels, Portable Medical Peripherals, Industrial Sensor Transmitters, Small Appliance Controllers, Consumer Wearable Devices.
Low-Power IoT Sensor Hubs
The PIC24FJ64GA702T-I/ML suits battery-powered IoT sensor nodes thanks to its eXtreme Low Power architecture delivering sub-1 uA Deep Sleep current with full RAM retention. Its 32 MHz / 16 MIPS performance handles sensor fusion, low-power wireless protocol stacks (LoRaWAN, BLE via UART) and 12-bit ADC sampling at 200 ksps simultaneously. The CTMU enables low-cost temperature, humidity and gas-sensor readout in single-chip designs, while 64 KB Flash / 8 KB RAM fits Microchip's MPLAB X IDE projects with FreeRTOS ports. With 21 GPIO and three comparators, designers can wake on analog thresholds to extend coin-cell lifetime to multiple years.
Recommended
Capacitive Touch HMI Panels
The PIC24FJ64GA702T-I/ML's on-chip CTMU peripheral combined with Microchip's mTouch library is its defining strength for touch-HMI products. The CTMU generates a constant-current source that charges a touch pad, then measures discharge time through the 12-bit ADC to detect finger capacitance changes of femtofarad levels. Combined with the 28-QFN's 21 GPIO for LED feedback and the 32 MHz MIPS core for debounce filtering, this enables 12-button panels, sliders and proximity sensors without any external touch IC. The QFN package keeps BOM cost low while supporting up to 200 ksps ADC throughput for fast scanning of multiple touch pads.
Recommended
Portable Medical Peripherals
For portable medical devices such as pulse oximeters, blood-pressure monitors and glucose meters, the PIC24FJ64GA702T-I/ML provides the right balance of analog integration, low power and deterministic 16-bit performance. The 12-bit ADC at 200 ksps captures photodiode and strain-gauge signals directly; three comparators enable battery-monitoring and over-voltage detection. eXtreme Low Power Sleep modes with sub-1 uA current extend battery life, and the industrial -40C to +85C temperature range supports both clinical and home-health environments. The 64 KB Flash holds both application firmware and IEC 62304-compliant safety libraries.
Recommended
Industrial Sensor Transmitters
The PIC24FJ64GA702T-I/ML is well-suited for 4-20 mA loop-powered industrial sensor transmitters where low power and robust peripherals matter. Operating from 2.0 V to 3.6 V with on-chip RTCC and three analog comparators, the MCU can measure process variables while running calibration and HART communication protocol via UART. The 28-QFN 6 x 6 mm with exposed pad delivers solid thermal performance for sealed enclosures, and the 32 MHz MIPS core executes 16-bit math for linearization and PID control in real time. Industrial temperature range ensures operation from cold outdoor installations to factory-floor environments.
Recommended
Small Appliance Controllers
For white-goods and small appliance control panels - coffee machines, air purifiers, washing-machine HMIs - the PIC24FJ64GA702T-I/ML offers touch buttons, motor-control timers and display driving in a single chip. The 21 GPIO can sink LED matrices directly through current-limiting resistors, while UART/SPI/I2C interfaces connect to motor-driver ICs, BLDC controllers and segment LCDs. 5 x 16-bit timers generate PWM for Triac-fired heaters and brushed DC motor speed loops. eXtreme Low Power Sleep keeps standby consumption under regulatory limits when the appliance is idle.
Recommended
Consumer Wearable Devices
Wearable fitness bands, smartwatches and hearables benefit from the PIC24FJ64GA702T-I/ML's combination of low power, capacitive touch and 12-bit ADC in a 6 x 6 mm QFN package. The sub-1 uA Deep Sleep current lets devices idle for months on a coin cell while monitoring accelerometers via GPIO interrupts. The CTMU enables touch buttons through plastic enclosures, eliminating mechanical switches and improving water resistance. With 64 KB Flash, designers can fit Bluetooth Low Energy profiles, fitness algorithms and OTA bootloader into a single chip, simplifying the wearable BOM.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA702T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA702T-I/ML | PIC24FJ64GA702-I/ML | PIC24FJ64GA702-I/MV | dsPIC33EP32GP502-I/MM |
|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (UQFN) - same footprint family | 28-QFN (6x6 mm) - same |
| Brand | 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) | dsPIC33E (16-bit DSC, 70 MIPS) | |
| Program Flash | 64 KB | 128 KB | 64 KB | 32 KB | |
| RAM | 8 KB | 8 KB | 8 KB | 4 KB | |
| ADC | 12-bit, 200 ksps | 12-bit, 200 ksps | 12-bit, 200 ksps | 10/12-bit, 1.1 Msps | |
| CTMU Touch | Yes | Yes | Yes | No | |
| Operating Voltage | 2.0-3.6 V | 2.0-3.6 V | 2.0-3.6 V | 3.0-3.6 V | |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | |
| Qty-1 Price (USD) | 3.45 | 4.10 | 3.45 | 3.95 |
Key Differentiators
- On-chip CTMU capacitive touch peripheral in 28-QFN (vs dsPIC33EP32GP502-I/MM)
- Same 28-QFN footprint with double Flash upgrade path (vs PIC24FJ128GA702T-I/ML)
- eXtreme Low Power Deep Sleep with full RAM retention (vs PIC24FJ128GA702T-I/ML)
Design Notes
Estimated: The 28-QFN exposed pad (pin 29) on the PIC24FJ64GA702T-I/ML must be soldered to a continuous ground copper pour of at least 25 mm^2 (5 x 5 mm) on the top layer for thermal dissipation. Without proper EP soldering, theta_JA rises from approximately 30 C/W to over 80 C/W, leading to thermal runaway at higher ambient temperatures. Stitch vias to the inner ground plane on a 1.0 mm pitch grid for best results.
Place 100 nF and 1 uF X7R ceramic decoupling capacitors within 3 mm of each VDD/VSS pair (pins 7/8 and 19/20) plus an additional 100 nF on AVdd/AVSS (pins 12/13). Use short, wide traces (>= 0.3 mm) and a small ferrite bead on AVdd if the analog readings show switching noise. Configure unused GPIO as outputs driving low to minimize Sleep current below 1 uA in eXtreme Low Power Deep Sleep mode.
Common design pitfalls with PIC24FJ64GA702T-I/ML: (1) Forgetting to solder the exposed pad - causes thermal failure and erratic ADC readings; (2) Driving MCLR without a 10 kOhm pull-up to VDD - prevents reliable Reset; (3) Sharing VDD/AVdd traces with high-current digital loads - injects noise into ADC; (4) Exceeding 32 MHz external crystal without configuring PLL properly - firmware hangs at startup; (5) Forgetting to disable unused peripherals in firmware - Deep Sleep current exceeds 10 uA instead of <1 uA target.
Route the 32 MHz crystal traces (OSC1/OSC2, pins 10/11) with a ground guard trace on both sides and keep total trace length under 5 mm. Add 10 pF-33 pF load capacitors on each oscillator pin matching the crystal's CL specification. For ADC accuracy on the 12-bit 200 ksps channels, add an RC low-pass filter (1 kOhm + 100 pF) on each analog input to suppress digital switching noise above 1 MHz.
Compliance Information
RoHS compliant per Microchip product page. Lead-free terminations. Not AEC-Q100 qualified (industrial grade only); for automotive designs choose PIC24FJXXXGA70X-I/PT family with automotive qualification.
