PIC24FJ64GA702-I/SS - 64KB Flash 16-bit MCU 28-SSOP | Microchip
MPN: PIC24FJ64GA702-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.66 | $266.00 |
| 500 | $2.31 | $1,155.00 |
| 1,000 | $2.02 | $2,020.00 |
PIC24FJ64GA702-I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program and data memory, programmable I/O peripherals, and often analog or communication blocks. The PIC24F architecture uses a 16-bit modified Harvard core with separate program and data buses, enabling single-cycle instruction fetch with most instructions executing in one or two cycles. Within the broader taxonomy, PIC24F MCUs sit between 8-bit PIC16/PIC18 devices and 32-bit PIC32 families, offering low-power 16-bit performance for cost-sensitive embedded designs.
The PIC24FJ64GA702 differentiates from generic 16-bit MCUs through several features: eXtreme Low Power (XLP) technology with multiple sleep modes down to nanoamp currents, ECC Flash for improved reliability in harsh environments, a peripheral trigger generator for hardware event sequencing, and the Charge Time Measurement Unit (CTMU) supporting capacitive touch and time-of-flight measurements. The 28-SSOP package exposes 21 general-purpose I/O pins while keeping the footprint compact for space-constrained designs.
Typical applications include low-power consumer products, capacitive touch user interfaces, battery-powered sensor nodes, IoT edge devices, and industrial HMI panels. The combination of 64KB Flash, DMA, multiple timers, and three comparators supports small protocol stacks and sensor-fusion front ends without external components.
When designing with this device, allocate 4 KB of Flash for the bootloader if remote firmware update is required, and place a 100 nF decoupling capacitor on each VDD/VDDcore pair. The internal 8 MHz oscillator is adequate for most applications, but USB or CAN bit-rate-critical designs should use an external crystal.
This page synthesizes distributor pricing, drop-in alternatives from the PIC24FJ family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ64GA702-I/SS — 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 PIC24FJ64GA702-I/SS (same form factor and footprint) — differing in ADC, Timers, Package, I2C, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA702-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ64GA702-I/MV
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC24FJ64GA702-E/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ64GA002-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.51 / Unit
View Datasheet →PIC24FJ32GA102-I/SS
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC24FJ48GA002-I/SS
✅ Drop-In✓ In Stock
$3.4 / Unit
View Datasheet →PIC24FJ64GA102-I/SS
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC24FJ64GA702-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit MCU |
| CPU Speed | 32 MHz (16 MIPS) |
| Program Memory (Flash) | 64 KB (22K x 24 instructions) |
| RAM | 16 KB |
| Package | 28-pin SSOP (5.30 mm body) |
| Operating Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| ADC | 12-bit, up to 200 ksps, up to 14 channels |
| Comparators | 3 |
| CTMU | Yes (for touch / time measurement) |
| DMA | Yes (8-channel) |
| Communication | UART, SPI, I2C |
| GPIO (approx) | 21 |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC24FJ64GA702-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / AN0 / CTMU |
| Pin 3 | RA1 — Port A bit 1 / AN1 |
| Pin 4 | RA2 — Port A bit 2 / AN2 / VREF- |
| Pin 5 | RA3 — Port A bit 3 / AN3 / VREF+ |
| Pin 6 | RA4 — Port A bit 4 |
| Pin 7 | RA5 — Port A bit 5 |
| Pin 8 | VDD — Positive supply |
| Pin 9 | OSC1 — Crystal oscillator input |
| Pin 10 | OSC2 — Crystal oscillator output |
| Pin 11 | RB0 — Port B bit 0 / PGED1 |
| Pin 12 | RB1 — Port B bit 1 / PGEC1 |
| Pin 13 | RB2 — Port B bit 2 |
| Pin 14 | RB3 — Port B bit 3 |
| Pin 15 | RB4 — Port B bit 4 |
| Pin 16 | RB5 — Port B bit 5 |
| Pin 17 | RB6 — Port B bit 6 |
| Pin 18 | RB7 — Port B bit 7 |
| Pin 19 | VSS — Ground |
| Pin 20 | RC0 — Port C bit 0 |
| Pin 21 | RC1 — Port C bit 1 |
| Pin 22 | RC2 — Port C bit 2 |
| Pin 23 | RC3 — Port C bit 3 / SDA1 |
| Pin 24 | RC4 — Port C bit 4 / SCL1 |
| Pin 25 | RC5 — Port C bit 5 |
| Pin 26 | RC6 — Port C bit 6 / TX1 |
| Pin 27 | RC7 — Port C bit 7 / RX1 |
| Pin 28 | VDD — Positive supply |
Typical Applications
PIC24FJ64GA702-I/SS is suitable for 6 applications: Capacitive Touch User Interface, Battery-Powered IoT Sensor Node, Industrial HMI Control Panel, Medical Monitoring Accessory, Smart Home Edge Controller, Automotive Body Electronics.
Capacitive Touch User Interface
The PIC24FJ64GA702-I/SS is well suited for capacitive touch UI panels thanks to its on-chip CTMU, three analog comparators, and 12-bit ADC at 200 ksps. The CTMU delivers constant current pulses whose discharge time on each sensor pad yields a capacitance reading independent of VDD drift, supporting reliable wake-on-touch at less than 1 uA quiescent. With 64 KB Flash and 16 KB RAM the MCU can run Microchip's mTouch library plus a small GUI or HID stack while keeping BOM cost low.
Recommended
Battery-Powered IoT Sensor Node
For battery-powered IoT sensor nodes the PIC24FJ64GA702-I/SS offers eXtreme Low Power modes down to nanoamp sleep currents while retaining RTC operation from a CR2032 down to 1.8 V. The 8-channel DMA offloads sensor sampling from the CPU, letting the core stay in sleep between scans and extending battery life into multi-year ranges. The 28-SSOP footprint fits inside small sensor enclosures, and the 12-bit ADC supports accurate temperature, humidity, and battery-voltage telemetry over UART or I2C.
Recommended
Industrial HMI Control Panel
Industrial HMI panels benefit from the PIC24FJ64GA702-I/SS's 21 GPIO pins, three comparators, and 12-bit ADC at 200 ksps for driving LED indicators, reading keypads, and sensing analog signals. The 16 MIPS performance supports Modbus RTU or proprietary RS-485 protocols, and ECC Flash improves reliability against soft errors in electrically noisy factory floors. The 28-SSOP package is easy to hand-rework during prototyping and the eXtreme Low Power feature reduces panel standby energy.
Recommended
Medical Monitoring Accessory
Wearable medical accessories such as pulse oximeters, thermometers, and adherence monitors can leverage the PIC24FJ64GA702-I/SS for its deterministic 16 MIPS core, low-power sleep modes, and 12-bit ADC accuracy. The ECC Flash contributes to data integrity required by IEC 62304 software lifecycles and supports long-term data logging. CTMU enables capacitive proximity wake-up without mechanical buttons, and the DMA engine lets the device sample multiple biosensors continuously while the core handles BLE link-layer duties via a companion module.
Recommended
Smart Home Edge Controller
In smart-home edge controllers and wireless sensor bridges the PIC24FJ64GA702-I/SS handles local control loops, BLE/Zigbee host coordination, and capacitive touch panels all from a single 28-SSOP part. Its 16 KB RAM accommodates modest protocol buffers, and 64 KB Flash is sufficient for Zigbee cluster libraries or Matter application code. eXtreme Low Power modes support always-on voice wake detection or PIR event monitoring at less than 1 uA, dramatically lowering standby energy for wall-powered and battery devices alike.
Recommended
Automotive Body Electronics
For non-safety automotive body applications such as lighting controllers, mirror adjusters, and seat switches, the PIC24FJ64GA702-I/SS provides robust ESD performance, eXtreme Low Power for quiescent battery drain, and 12-bit ADC accuracy for sensor inputs. While the /I grade tops out at +85 C, the extended /E grade sibling in the same 28-SSOP package handles under-hood environments. Combined with watchdog timer and ECC Flash, this MCU is well-suited to AEC-Q100-style requirements on cost-sensitive body controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ64GA702-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA702-I/SS | PIC24FJ64GA702-I/MV | PIC24FJ64GA702-E/SS | PIC24FJ64GA002-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-UQFN (different footprint) | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 128 KB | 64 KB | 64 KB | 64 KB |
| RAM | 16 KB | 8 KB | 16 KB | 16 KB | 8 KB |
| CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 10-bit |
| DMA | Yes (8-channel) | Yes | Yes | Yes | No |
| ECC Flash | Yes | Yes | Yes | Yes | No |
| CTMU Touch | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C |
Key Differentiators
- Higher memory headroom without PCB change (vs PIC24FJ128GA702-I/SS)
- Higher temperature grade option for harsh environments (vs PIC24FJ64GA702-E/SS)
- Modern eXtreme Low Power features vs older GA002 die (vs PIC24FJ64GA002-I/SS)
Design Notes
The PIC24FJ64GA702-I/SS operates from 2.0 V to 3.6 V on VDD with an internal 1.8 V core LDO. Place a 100 nF decoupling capacitor within 3 mm of every VDD/VSS pair and a bulk 4.7 uF ceramic near the device. For battery applications, retain the on-chip LDO enabled in Deep Sleep modes to keep RTC and brown-out reset active below 1.8 V.
Route the ICSP programming pins PGED1 (RB0) and PGEC1 (RB1) to a 2-pin header or test pad for in-circuit programming. Avoid placing high-frequency traces near the OSC1/OSC2 crystal traces to reduce jitter, and use a 4-layer PCB with a continuous ground plane under the MCU for best EMI performance with the 32 MHz CPU.
Do not skip the MCLR pull-up resistor on pin 1; a floating MCLR can cause spurious resets. Configure unused pins as digital outputs driven low to minimize sleep current. When migrating from PIC24FJ64GA002 firmware, verify ADC configuration because the GA702's 12-bit ADC replaces the 10-bit ADC and requires different calibration registers.
Estimated: with CPU at 32 MHz and three comparators toggling simultaneously, ground-bounce of about 50-100 mV can appear on VSS if the ground plane is split. Keep analog VSS and digital VSS returns unified and place the MCU over the lowest-impedance path to the regulator output capacitor. A ferrite bead between analog and digital VDD rails further improves ADC SNR.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified directly; for automotive use consult Microchip's automotive PIC24F portfolio.
