PIC24F32KA302-I/SO - 32MHz Low-Power MCU | Microchip
MPN: PIC24F32KA302-I/SO ✓ ActivePIC24F32KA302-I/SO Overview
A microcontroller is a programmable integrated circuit that combines a processor core, nonvolatile program memory, volatile data memory, and peripherals such as analog converters, timers, communication interfaces, and I/O ports. The PIC24F32KA302 belongs to the PIC24 low-power MCU family, combining a 16-bit architecture with eXtreme Low Power, or XLP, technology for portable and energy-conscious equipment.
Key features include up to 16 MIPS operation, a 12-bit ADC, capacitive measurement technology, 512 bytes of EEPROM, 17 I/O ports, and a 1.8 V to 3.6 V operating supply range. DSBOR, DSWDT, and the real-time clock and calendar can continue operating in Deep Sleep mode, helping preserve system state and reduce standby consumption in battery-powered designs.
The device combines a PIC 16-bit RISC core with dedicated peripheral blocks for analog measurement, timing, digital I/O, and low-power control. Its operation from 1.8 V to 3.6 V supports both 1.8 V and 2.5 V or 3.3 V system rails. Flash memory permits firmware to be programmed and updated in the field, while the small RAM and EEPROM footprint suits compact control products that do not require a high-end processor.
Typical applications include battery-powered monitors, portable measurement instruments, industrial sensing nodes, low-power environmental controls, compact medical accessories, and embedded products with touch or capacitive sensing. The 28-pin SOIC package provides a practical option for through-hole assembly and prototype boards where a surface-mount QFN footprint would be inconvenient.
Designers should account for the 1.8 V to 3.6 V supply limitation, validate ADC and capacitive-measurement performance across the intended temperature range, and select capacitors and external components using the manufacturer’s guidance. If Deep Sleep behavior is critical, confirm the exact peripheral states, wake sources, and timing from the device-specific documentation rather than relying only on average-current figures.
This product page combines verified manufacturer and distributor information with package-aware alternative analysis, practical low-power design notes, and a parameter comparison intended to accelerate component selection and sourcing.
Drop-in alternatives for PIC24F32KA302-I/SO — 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 PIC24F32KA302-I/SO (same form factor and footprint) — differing in Package, ADC, Flash Program Memory, Low-Power Technology, Operating Temperature Range.
PIC24F32KA302-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F32KA302T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24F32KA302-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | 16-bit low-power Flash microcontroller |
| Processor Architecture | 16-bit PIC RISC |
| Maximum Clock Speed | 32 MHz |
| Maximum Instruction Rate | 16 MIPS |
| Flash Program Memory | 32 KB (11K x 24 words) |
| RAM Memory | 2 KB |
| EEPROM Memory | 512 bytes |
| ADC Resolution | 12 bits |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Nominal Supply Options | 2.5 V and 3.3 V |
| I/O Port Count | 17 ports |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 28-pin SOIC, 0.300 inch pitch |
| Low-Power Technology | PIC XLP with Deep Sleep mode |
| Deep Sleep Peripherals | DSBOR, DSWDT, and RTCC |
| Capacitive Measurement | CTMU supported |
| Terminal Finish | Lead-free plastic |
| RoHS Status | Compliant |
| Automotive Qualification | AEC-Q100 |
PIC24F32KA302-I/SO 28-pin soic, 0.300 inch pitch Pin Configuration Guide
Pin configuration for PIC24F32KA302-I/SO (28-pin soic, 0.300 inch pitch 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 PIC24F32KA302-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC24F32KA302-I/SO is suitable for 6 applications: Battery-Powered Environmental Sensors, Portable Measurement Instruments, Industrial Control and Condition Monitoring, Low-Power IoT Sensor Nodes, Compact Medical and Wellness Devices, Capacitive-Touch User Interfaces.
Battery-Powered Environmental Sensors
The PIC24F32KA302-I/SO fits battery-powered environmental sensors because its PIC XLP architecture and 1.8 V to 3.6 V operating range support low-voltage designs, while DSBOR, DSWDT, and RTCC remain available in Deep Sleep mode. A sensor node can wake on a timer or external event, sample through the 12-bit ADC, update its state, and return to sleep without leaving the MCU continuously powered. The 32 MHz clock and 16 MIPS capability provide useful processing headroom when filtering measurements or formatting local data. The main design trade-off is that average current depends heavily on sensor duty cycle, wake sources, and board leakage. Deep Sleep should be configured only after confirming which timers, communications, and analog blocks are required to remain active.
Recommended
Portable Measurement Instruments
The PIC24F32KA302-I/SO is suitable for portable measurement instruments that combine low-voltage operation, analog acquisition, and modest embedded processing. Its 12-bit ADC can capture sensor or control signals, while the 16-bit PIC RISC core operating at up to 32 MHz and 16 MIPS can perform calibration, filtering, and display-data preparation. The 32 KB Flash and 2 KB RAM provide code space for measurement routines without requiring a larger processor in compact products. A 28-pin SOIC also simplifies assembly in instruments assembled through holes. For battery-operated instruments, sleep modes can reduce consumption between measurements, although sensor excitation and analog front-end current must be included in the complete power budget.
Recommended
Industrial Control and Condition Monitoring
The PIC24F32KA302-I/SO can serve as the local controller in industrial condition-monitoring equipment where a 28-pin SOIC package, 17 I/O ports, and low-voltage operation simplify product construction. The microcontroller can supervise sensors, operate timers, process switch states, and use its CTMU capability for compatible capacitive measurements. Its -40 °C to +85 °C industrial operating range supports equipment deployed across controlled industrial environments, while the 1.8 V to 3.6 V supply range allows operation from low-voltage rails. For motor, relay, or long-cable interfaces, designers must add appropriate protection and isolation because the MCU pins are not intended for unrestricted power-stage loads.
Recommended
Low-Power IoT Sensor Nodes
The PIC24F32KA302-I/SO supports low-power IoT sensor nodes that must balance processing capability with battery life. Its PIC XLP design includes Deep Sleep-capable DSBOR, DSWDT, and RTCC functions, allowing the design to preserve timing and brownout-monitoring behavior while reducing active consumption. The 16-bit core can execute protocol framing and local filtering, and 32 KB of Flash provides room for a complete application without external program memory. Designers should use the manufacturer’s power tables to quantify each active and sleep state. Radio duty cycle, sensor self-heating, pull-up resistors, and regulator leakage can dominate system energy, so the MCU should not be selected on operating frequency alone.
Recommended
Compact Medical and Wellness Devices
The PIC24F32KA302-I/SO can be used in compact medical or wellness devices that need mixed digital and analog functions in a small controller package. Its 12-bit ADC supports suitable sensor acquisition, CTMU enables compatible capacitive sensing, and the 16-bit architecture supports deterministic control and measurement processing. Operation from 1.8 V to 3.6 V permits use with compact battery and regulated power systems, while Deep Sleep mode can reduce consumption between user interactions or sensing cycles. Medical suitability is application-specific: developers must evaluate electrical isolation, accuracy, safety, and regulatory requirements independently. The MCU specification alone does not establish compliance for any particular medical device standard or clinical function.
Recommended
Capacitive-Touch User Interfaces
The PIC24F32KA302-I/SO is appropriate for compact capacitive-touch user interfaces because it includes CTMU capability and a 16-bit core with up to 16 MIPS performance. A product can scan touch electrodes, apply filtering and debounce logic, update indicators, and manage low-power states within one controller. The 12-bit ADC remains available for analog monitoring, and the 28-pin SOIC leaves a practical number of I/O resources for display or communication functions. Touch performance depends on electrode geometry, guard-ring layout, acquisition timing, and calibration. The data supplied here does not specify CTMU channel count or timing limits, so those details must be confirmed in the official datasheet before selecting scan rates or grounding strategies.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F32KA302-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F32KA302-E/SO | PIC24F32KA302T-I/SO |
|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC - same | 28-pin SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Processor Architecture | 16-bit PIC RISC | 16-bit PIC RISC | 16-bit PIC RISC |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz |
| Maximum Instruction Rate | 16 MIPS | 16 MIPS | 16 MIPS |
| Flash Program Memory | 32 KB (11K x 24 words) | 32 KB (11K x 24 words) | 32 KB (11K x 24 words) |
| RAM Memory | 2 KB | 2 KB | 2 KB |
| EEPROM Memory | 512 bytes | 512 bytes | 512 bytes |
| ADC Resolution | 12 bits | 12 bits | 12 bits |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Target Operating Range | -40 °C to +85 °C | Extended-temperature ordering option | T ordering-temperature option |
Key Differentiators
- Directly matches the verified low-voltage industrial design target (vs PIC24F32KA302-E/SO)
- Provides complete low-power control hardware for battery designs (vs PIC24F32KA302T-I/SO)
- Combines analog acquisition and capacitive measurement in a compact MCU (vs PIC24F32KA302-E/SO)
Design Notes
Calculate the complete power budget from the active current, sleep current, regulator efficiency, sensor duty cycle, and wake-up frequency. The PIC24F32KA302-I/SO supports operation from 1.8 V to 3.6 V and includes Deep Sleep-capable DSBOR, DSWDT, and RTCC functions, but the supplied data does not contain numeric current states. Confirm each operating mode in the manufacturer power tables, disable unused peripherals, and avoid leaving floating GPIO inputs to prevent unintended current consumption.
Place the MCU and its required decoupling components close to the appropriate supply pins. Follow the official datasheet for the 1.8 V to 3.6 V supply range, including permitted capacitor technology, voltage rating, and ESR. Because a 28-pin SOIC can be susceptible to switching-node coupling in mixed-signal layouts, route noisy power and communication paths away from ADC inputs and keep CTMU-sensitive traces short, guarded, and isolated where required.
Do not substitute PIC24F32KA302-I/SP or PIC24F32KA302-I/ML for the target without redesigning the PCB. The SP and ML suffixes identify different packages, not alternative package options for the 28-pin SOIC footprint. Similarly, do not infer that all E, I, or T suffixes are interchangeable without checking the exact temperature grade and qualification configuration. Always compare the package drawing, pin names, electrical limits, and active status before approving a substitution.
Compliance Information
The Arrow listing identifies the PIC24F32KA302-I/SO as AEC-Q100 automotive qualified, and the verified package description identifies lead-free plastic construction. RoHS is listed as compliant. Reach, halogen-free status, and conflict-minerals compliance are not explicitly established by the supplied data.
