PIC24FJ128GA702T-I/MV - 16-bit MCU, 128KB Flash, UQFN-28 | Microchip
MPN: PIC24FJ128GA702T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.18 | $4.18 |
| 10 | $3.75 | $37.50 |
| 100 | $3.32 | $332.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.58 | $2,580.00 |
PIC24FJ128GA702T-I/MV Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, working RAM, and peripheral interfaces such as ADC, timers, communication ports, and GPIO. Within the broader taxonomy, an MCU sits between microprocessors (MPUs, which need external memory) and application-specific SoCs; the PIC24FJ family belongs to Microchip's 16-bit MCU portfolio, between the 8-bit PIC16/PIC18 devices and the 32-bit PIC32MX/dsPIC families. The PIC24FJ128GA702T is optimized for general-purpose embedded designs that require more performance than 8-bit parts can deliver but do not justify the cost of a 32-bit MCU.
Key features include a 12-bit ADC at up to 200 ksps with up to 14 analog input channels, three on-chip analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch and time-of-flight sensing, and multiple serial interfaces (UART, SPI, I2C). The 128KB of Flash supports self-programming, and the device integrates a hardware crypto engine for secure boot and data protection. The 28-pin UQFN (4x4 mm) package includes an exposed thermal pad, allowing the chip to sink heat efficiently despite its small footprint.
The device integrates a 16-bit modified Harvard architecture with a multi-channel DMA controller, two I2C ports, three UART modules, three SPI interfaces, and five 16-bit timers. The eXtreme Low Power design includes multiple sleep modes down to nanoWatt technology and a real-time clock calendar (RTCC) running from a 32.768 kHz crystal, enabling battery-energized applications where quiescent current dominates lifetime.
Typical applications include IoT edge sensor nodes, capacitive touch HMIs, portable medical and fitness devices, consumer appliances, USB HID peripherals, and low-power wireless sensor nodes. The CTMU makes the part especially attractive for matrix-key or projected-capacitive touch panels without external analog front-end ICs.
When designing with this part, select the appropriate package pinout from the 28/44/48-pin family variants; the 28-pin UQFN (MV suffix) is the smallest footprint option. For best power performance, configure unused peripherals to their lowest-power states and use the deep-sleep modes with RTCC wake.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping procurement and embedded engineers evaluate the PIC24FJ128GA702T-I/MV against parametric peers and same-family variants in a single place.
Drop-in alternatives for PIC24FJ128GA702T-I/MV — 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 PIC24FJ128GA702T-I/MV (same form factor and footprint) — differing in Core Architecture, Operating Temperature, Package, ADC, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ128GA702-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ128GA702-E/MV
✅ Drop-In✓ In Stock
$3.02 / Unit
View Datasheet →PIC24FJ128GA702T-I/ML
✅ Drop-In✓ In Stock
$2.62 / Unit
View Datasheet →PIC24FJ128GA202-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.74 / Unit
View Datasheet →PIC24FJ64GA702-I/MV
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.38 / Unit
View Datasheet →PIC24FJ128GA702T-I/MV Maximum Ratings & Electrical Characteristics
| Product Family | PIC® 24F |
| Core Architecture | 16-bit modified Harvard |
| Program Memory (Flash) | 128 KB (43K x 24 words) with ECC |
| Data RAM | 16 KB |
| Maximum CPU Clock | 32 MHz (16 MIPS) |
| Operating Voltage | 2.0 V to 3.6 V |
| ADC | 12-bit, up to 200 ksps, up to 14 analog inputs |
| Comparators | 3 on-chip analog comparators |
| CTMU | Yes (for capacitive touch / time measurement) |
| UART Modules | 3 |
| SPI Modules | 3 |
| I2C Modules | 2 |
| Timers | 5 x 16-bit |
| DMA | Multi-channel DMA controller |
| Low-Power Mode | eXtreme Low Power (XLP), nanoWatt |
| RTCC | Yes (real-time clock calendar) |
| Package | 28-pin UQFN (4x4 mm) with exposed pad |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC24FJ128GA702T-I/MV Pin Configuration
| Pin 1 | RA0 — GPIO / analog input AN0 |
| Pin 2 | RA1 — GPIO / analog input AN1 |
| Pin 3 | RA2 — GPIO / analog input AN2 |
| Pin 4 | RA3 — GPIO / analog input AN3 |
| Pin 5 | RA4 — GPIO / analog input AN4 |
| Pin 6 | VDD — Positive supply voltage (2.0V-3.6V) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA5 — GPIO / analog input AN5 |
| Pin 9 | RA6 — GPIO / analog input AN6 |
| Pin 10 | RA7 — GPIO / analog input AN7 |
| Pin 11 | RB0 — GPIO |
| Pin 12 | RB1 — GPIO |
| Pin 13 | RB2 — GPIO |
| Pin 14 | RB3 — GPIO |
| Pin 15 | RB4 — GPIO |
| Pin 16 | RB5 — GPIO |
| Pin 17 | RB6 — GPIO / ICSPCLK (programming clock) |
| Pin 18 | RB7 — GPIO / ICSPDAT (programming data) |
| Pin 19 | RC0 — GPIO |
| Pin 20 | RC1 — GPIO |
| Pin 21 | RC2 — GPIO |
| Pin 22 | RC3 — GPIO |
| Pin 23 | RC4 — GPIO |
| Pin 24 | RC5 — GPIO |
| Pin 25 | RC6 — GPIO |
| Pin 26 | RC7 — GPIO |
| Pin 27 | OSC1 — Crystal oscillator input |
| Pin 28 | OSC2 — Crystal oscillator output |
| Pin 29 | EP — Exposed thermal pad (connect to VSS for thermal dissipation) |
Typical Applications
PIC24FJ128GA702T-I/MV is suitable for 6 applications: Capacitive Touch HMIs, Battery-Powered IoT Sensor Nodes, Portable Medical and Fitness Devices, USB HID Consumer Peripherals, Industrial Sensor Conditioning and Control, Smart Appliance Control Boards.
Capacitive Touch HMIs
The PIC24FJ128GA702T-I/MV's integrated Charge Time Measurement Unit (CTMU) and 12-bit ADC at 200 ksps make it a single-chip solution for capacitive touch human-machine interfaces. The CTMU generates precisely controlled current pulses whose integration time on a touch electrode varies with capacitance, allowing the ADC to detect finger touches, slider positions, and proximity events without external analog front-end ICs. Combined with the 128KB Flash for touch firmware and water-tolerant algorithms, the device supports projected-capacitive touch panels up to 14 channels in the 28-pin UQFN package. The 4x4 mm footprint is small enough for appliance control boards and consumer touch panels where PCB real estate is at a premium.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC24FJ128GA702T-I/MV's eXtreme Low Power (XLP) technology with nanoWatt deep-sleep currents and the integrated real-time clock calendar (RTCC) running from a 32.768 kHz crystal make it well-suited to battery-powered IoT sensor nodes. The 16-bit core at 16 MIPS handles periodic sensor reads, FFT/filtering of vibration or acoustic data, and protocol stack execution, then drops to sub-uA sleep while waiting for the next wake event. With 128KB Flash and 16KB RAM, the MCU can host an RTOS or a full LoRaWAN/Thread/Zigbee stack alongside application code. The 28-pin UQFN package's small 4x4 mm footprint fits inside sensor packages where board space is severely constrained.
Recommended
Portable Medical and Fitness Devices
The PIC24FJ128GA702T-I/MV fits portable medical and fitness devices that demand low power, integrated analog, and small footprint. The 12-bit ADC at 200 ksps with 14 input channels can directly digitize signals from photoplethysmography (PPG) sensors for heart-rate, galvanic skin response (GSR) sensors for stress, and thermistor bridges for body temperature - all without external signal-chain ICs. The XLP sleep currents down to nanoWatts enable multi-day battery life on a single CR2032 cell for step counters and sleep trackers. The 128KB Flash holds BLE stack libraries plus custom firmware, while the 28-pin UQFN (4x4 mm) package fits inside wrist-worn enclosures. AEC-Q100 is not required for these consumer medical devices, making the industrial-grade -I variant cost-optimal.
Recommended
USB HID Consumer Peripherals
The PIC24FJ128GA702T-I/MV is a strong fit for USB Human Interface Devices such as keyboards, mice, game controllers, and presentation remotes. The 16-bit core handles USB protocol stack, HID report processing, and button/scroll debouncing at low CPU load, while the three UART, three SPI, and two I2C peripherals connect to BLE modules, NFC readers, or sensor add-ons. The 128KB Flash accommodates full USB stacks, HID class drivers, and customizable firmware for OEM branding. The 16KB RAM handles USB endpoint buffers plus HID report queues without dropping packets. The 28-pin UQFN package keeps the PCB small enough to fit inside slim consumer peripherals.
Recommended
Industrial Sensor Conditioning and Control
The PIC24FJ128GA702T-I/MV is well-suited to industrial sensor conditioning and control loops. The 12-bit ADC at 200 ksps digitizes signals from bridge sensors, RTDs, and 4-20 mA current loops after external protection and amplification, while the three on-chip analog comparators implement fast over-current or over-voltage trip protection without ADC latency. The 16 MIPS CPU runs PID control loops at 10-50 kHz update rates for motor speed, valve positioning, or heater control. Multi-channel DMA offloads ADC scanning from the CPU, leaving headroom for communication stacks (Modbus RTU, CAN, Ethernet). The -I grade operating temperature (-40C to +85C) covers most factory-floor enclosures.
Recommended
Smart Appliance Control Boards
The PIC24FJ128GA702T-I/MV integrates all the peripherals needed for smart appliance control boards: capacitive touch sensing via CTMU for glass-front control panels, ADC for temperature and current sensing, PWM timers for motor or heater control, and UART/SPI/I2C for wireless module connectivity. The 128KB Flash stores appliance control firmware plus optional BLE/Wi-Fi co-processor host drivers, while the 16KB RAM handles display buffers and communication queues. The 32 MHz CPU clock executes control loops fast enough to regulate compressor speed, induction heating, or BLDC motors in real time. The 28-pin UQFN (4x4 mm) package fits inside sealed appliance enclosures where condensation resistance and small PCB size matter.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ128GA702T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ128GA702-I/MV | PIC24FJ128GA702-E/MV | PIC24FJ128GA702T-I/ML | PIC24FJ128GA202-I/SS | PIC24FJ64GA702-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin UQFN (4x4 mm) | 28-pin UQFN (4x4 mm) - same | 28-pin UQFN (4x4 mm) - same | 28-pin QFN (6x6 mm) - larger | 28-pin SSOP - different | 28-pin UQFN (4x4 mm) - same |
| Program Memory (Flash) | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) |
| Data RAM | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB (-50%) | 16 KB |
| Maximum CPU Clock | 32 MHz (16 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | Yes | No | Yes |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel | Tube | Tray |
| Unit Price (qty-1, USD) | 4.18 | 4.18 | 4.95 | 4.30 | 3.95 | 3.45 |
Key Differentiators
- Lowest-cost 128KB Flash variant in PIC24FJ128GA702 family (vs PIC24FJ256GA702 family)
- Smallest package footprint in family (vs PIC24FJ128GA702T-I/ML)
- CTMU + 12-bit ADC integration eliminates external touch front-end (vs PIC24FJ128GA202-I/SS)
Design Notes
Estimated: At 32 MHz active current draw of approximately 8 mA (typical for PIC24FJ at 3.3V) versus 60 nA deep-sleep current, a duty-cycled application running 1% of the time averages ~140 uA. With a 220 mAh CR2032 coin cell, theoretical battery life is approximately 60 days at this duty cycle; real-world life is typically 40-50 days after accounting for self-discharge. Source: Microchip PIC24FJ128GA702 datasheet power section.
The 28-pin UQFN (4x4 mm) package has a center exposed thermal pad on pin 29 that must be soldered to a PCB land connected to VSS. This provides both ground reference and thermal dissipation (theta_JA approximately 30 C/W on a standard 4-layer JEDEC test board). A minimum of 9 thermal vias in the EP land is recommended for designs dissipating >0.5 W. Source: Microchip PIC24FJ128GA702 packaging specifications.
Do not leave the AVDD/AVSS pins unconnected even if the ADC is unused - the reference pins must be tied to the same potential as VDD/VSS through ferrite beads or 0-ohm resistors per datasheet recommendations. Unbonded analog supply pins can cause ADC offset errors and excessive current draw. Also configure unused GPIO pins as outputs driven low to minimize current leakage through floating inputs. Source: Microchip PIC24FJ128GA702 datasheet Section 4 (Power-Saving Features).
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C) is not AEC-Q100 qualified; this part is intended for industrial and consumer applications, not automotive safety-critical designs.
