PIC24F32KA301T-I/SO - 32KB Flash 16-bit XLP MCU | Microchip
MPN: PIC24F32KA301T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.43 | $1,215.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC24F32KA301T-I/SO Overview
A 16-bit microcontroller (MCU) is a programmable processor core with a 16-bit data path, register file, and instruction set, sitting between 32-bit application processors and 8-bit MCUs in the embedded hierarchy. The PIC24F family is Microchip's mid-range 16-bit line, bridging the PIC16/18 8-bit families and the dsPIC/PIC32 32-bit lines, and is widely deployed in consumer, industrial, sensor, and medical products where low power and moderate compute throughput are required.
Key features of this device include a 12-channel 12-bit A/D converter with CTMU support for capacitive touch sensing, 5 CCP/ECCP modules for PWM/capture/compare, multiple timers, UART/SPI/I2C peripherals, deep-sleep brown-out reset (DSBOR), deep-sleep watchdog timer (DSWDT), and a real-time clock/calendar (RTCC) that operates in deep sleep. XLP technology enables nanoWatt deep sleep currents, making the part suitable for energy-harvesting and battery-life-critical designs.
The architecture is a modified Harvard 16-bit RISC core with a 24-bit instruction word, 17x17 hardware multiplier, and C-friendly instruction set. The CMOS process and low-leakage design give active currents around 8 mA at 32 MHz and deep-sleep currents below 100 nA with RTCC active, which is critical for products with multi-year battery life targets.
Typical applications include wearable fitness bands, IoT sensor nodes, low-power wireless metering, capacitive touch user interfaces, portable medical monitors, and remote-control HMIs. The 20-pin SOIC footprint enables retrofits of legacy 8-bit PIC designs where more code space and higher MIPS are needed without a PCB change. Industrial and consumer segments also use this part for white goods, sensor hubs, and BLE-proxied accessories.
When designing with this MCU, budget 2 KB of SRAM carefully: deep stack usage or large string formatting can quickly exhaust it. For ultra-low standby targets, use the RTCC-alarm wake path (deep sleep + DSBOR/DSWDT) and disable unused peripherals via PMD registers to keep quiescent current under 1 uA.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an AEO-optimized decision capsule beyond the standard product listing.
Drop-in alternatives for PIC24F32KA301T-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 PIC24F32KA301T-I/SO (same form factor and footprint) — differing in ADC, Package, Core Architecture, I/O Pins, Low-Power Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24F32KA301-I/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24F16KA301T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.48 / Unit
View Datasheet →PIC24F16KA101T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.04 / Unit
View Datasheet →PIC24F08KM202T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.65 / Unit
View Datasheet →PIC24F04KA201T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.89 / Unit
View Datasheet →PIC24F32KA302T-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24F32KA301T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F RISC (modified Harvard) |
| Maximum Clock Speed | 32 MHz |
| Performance | 16 MIPS |
| Program Memory (Flash) | 32 KB (11K x 24 instructions) |
| Data RAM | 2 KB |
| EEPROM | 512 bytes |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 17 |
| ADC | 12-channel, 12-bit |
| Package | 20-pin SOIC (SO, 0.300 inch, lead-free) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Low-Power Technology | XLP (eXtreme Low Power) |
| CTMU (Capacitive Touch) | Yes |
| RTCC in Deep Sleep | Yes |
| RoHS Status | Compliant |
PIC24F32KA301T-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — Port A bit 0 / analog input AN0 |
| Pin 3 | RA1 — Port A bit 1 / analog input AN1 |
| Pin 4 | RB0 — Port B bit 0 / analog input AN2 / PGED1 |
| Pin 5 | RB1 — Port B bit 1 / analog input AN3 / PGEC1 |
| Pin 6 | RB2 — Port B bit 2 / analog input AN4 |
| Pin 7 | RB3 — Port B bit 3 / analog input AN5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSCI — Oscillator input / CLKI |
| Pin 10 | OSCO — Oscillator output / CLKO |
| Pin 11 | RB4 — Port B bit 4 / SDA1 (I2C data) |
| Pin 12 | RB5 — Port B bit 5 / SCL1 (I2C clock) |
| Pin 13 | RB6 — Port B bit 6 / analog input AN6 |
| Pin 14 | RB7 — Port B bit 7 / analog input AN7 |
| Pin 15 | RC0 — Port C bit 0 / analog input AN8 |
| Pin 16 | RC1 — Port C bit 1 / analog input AN9 |
| Pin 17 | RC2 — Port C bit 2 / analog input AN10 |
| Pin 18 | RC3 — Port C bit 3 / analog input AN11 |
| Pin 19 | VSS — Ground reference (second VSS) |
| Pin 20 | VDD — Positive supply voltage (1.8-3.6 V) |
Typical Applications
PIC24F32KA301T-I/SO is suitable for 6 applications: Wearable Fitness Band Wearable, IoT Wireless Sensor Node IoT, Capacitive Touch User Interface, Portable Medical Monitor Medical, Remote Control and Home Sensor, Industrial Sensor Hub Industrial.
Wearable Fitness Band Wearable
The PIC24F32KA301T-I/SO is well-suited for wearable fitness band designs. Its XLP technology delivers 20 nA typical deep-sleep current with RTCC off, enabling multi-month coin-cell operation typical of step-counters and heart-rate bands. The 16 MIPS performance at 32 MHz handles BLE-stack proxy, accelerometer polling, and OLED refresh tasks without breaking low-power budgets. With 32 KB Flash, designers can implement activity-tracking firmware, custom gesture detection, and on-device data filtering while staying in the 20-pin SOIC footprint.
Recommended
IoT Wireless Sensor Node IoT
The PIC24F32KA301T-I/SO serves as the host MCU for IoT wireless sensor nodes pairing with sub-GHz transceivers. The 12-bit 12-channel ADC reads multiple analog sensors (temperature, humidity, gas) while the 32 KB Flash stores LoRaWAN/Sigfox protocol stacks or BLE HCI command sequences. CTMU support enables capacitive soil-moisture sensing for agricultural nodes, and the 1.8-3.6 V range accepts both 3.6 V lithium-thionyl primary cells and energy-harvester outputs with regulation.
Recommended
Capacitive Touch User Interface
The PIC24F32KA301T-I/SO is ideal for capacitive touch user interfaces including white-goods control panels, appliance keypads, and industrial HMIs. Its integrated CTMU (Charge Time Measurement Unit) hardware performs direct charge-time measurement without external components, supporting up to 12 touch channels with Microchip's mTouch reference firmware library. With 32 KB Flash, the device runs water-rejection, proximity-sensing, and slider/wheel algorithms simultaneously. The 32 MHz MIPS rating ensures sub-10 ms touch response while the XLP deep sleep keeps idle current under 30 nA.
Recommended
Portable Medical Monitor Medical
The PIC24F32KA301T-I/SO fits portable medical monitors such as pulse oximeters, blood-pressure cuffs, and single-parameter patient wearables. The 12-bit ADC with internal bandgap provides ratiometric measurement for SpO2 photodiode front-ends, while 32 KB Flash stores lookup tables and trending algorithms. The 1.8-3.6 V range directly supports 3 V lithium primary cells common in medical disposables, and the XLP deep sleep with RTCC preserves calendar time for multi-day continuous monitoring without battery replacement.
Recommended
Remote Control and Home Sensor
The PIC24F32KA301T-I/SO powers remote-control and home sensor products including BLE-proxied thermostats, door/window sensors, and smart-meter displays. The CCP/ECCP modules generate PWM for LED indicators and buzzer alerts, while UART/SPI/I2C peripherals connect to radios and EEPROM. With XLP technology and 20 nA deep-sleep current, a CR2032 battery can power a window sensor for 5+ years with hourly wake cycles. The 20-pin SOIC is easy to hand-solder for low-volume smart-home products.
Recommended
Industrial Sensor Hub Industrial
The PIC24F32KA301T-I/SO is well-suited to industrial sensor hubs aggregating multiple analog/digital sensor inputs for factory-automation PLCs. The 12-channel 12-bit ADC plus CTMU handle multi-modal sensing, while multiple UART ports bridge RS-485 sensor networks. Operating temperature -40C to +85C covers industrial enclosure requirements, and the 1.8-3.6 V range allows 3.3 V system rails. The 32 KB Flash supports Modbus RTU/ASCII protocol stacks, calibration tables, and diagnostic logging firmware.
Recommended
Recommended Products Summary
Engineering reference data for PIC24F32KA301T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24F32KA301-I/SO | PIC24F16KA301T-I/SO | PIC24F16KA101T-I/SO | PIC24F08KM202T-I/SO | PIC24F04KA201T-I/SO |
|---|---|---|---|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 16 KB | 8 KB | 4 KB |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| I/O Pins | 17 | 17 | 17 | 17 | 17 | 17 |
| Low-Power Technology | XLP (20 nA deep-sleep) | XLP (20 nA deep-sleep) | XLP | XLP | XLP | nanoWatt |
Key Differentiators
- Largest Flash in 20-pin SOIC PIC24F XLP family (vs PIC24F16KA301T-I/SO)
- Full 12-bit 12-channel ADC vs lower-cost variants (vs PIC24F16KA101T-I/SO)
- CTMU hardware for capacitive touch vs software-only solutions (vs PIC24F08KM202T-I/SO)
- 20 nA deep-sleep current vs legacy PIC24F 100-500 nA (vs PIC24F04KA201T-I/SO)
Design Notes
Estimated: For a CR2032 coin-cell design (220 mAh, 3 V), the PIC24F32KA301T-I/SO delivers 5+ years of battery life if wake cycles stay under 1 per hour and the deep-sleep current holds near 20 nA. Disable unused peripherals via PMD registers, retain only RTCC if timekeeping is needed, and keep active-mode duration below 5 ms per wake to maximize battery life. Brown-out reset threshold should be set to 1.8 V minimum to maximize usable capacity from alkaline cells.
Place a 100 nF decoupling capacitor as close as possible to pin 20 (VDD) and a 10 uF bulk capacitor near the IC for ADC reference stability. For capacitive touch applications, route CTMU traces with guard rings and avoid crossing noisy digital signals (PWM, clock) near touch channels. The 20-pin SOIC footprint provides generous routing space, so use a 4-layer PCB with dedicated ground plane for best ADC performance under -80 dB FS noise floor.
Common pitfalls with the PIC24F32KA301T-I/SO include: (1) exceeding 32 MHz will cause Flash wait-state violations - always configure the system clock divider correctly; (2) using the internal 8 MHz oscillator without calibration drifts up to 5% over temperature - use the FRC PLL with tuning for UART accuracy; (3) CTMU calibration constants vary per chip, so always run the mTouch calibration sequence at startup for reliable touch thresholds. Avoid using the ICSPPG clock pins as GPIO during debug sessions unless the debugger is disconnected.
Keep the MCLR pull-up resistor (typically 10 kOhm) close to the IC and avoid long traces to prevent false resets from capacitive loading. The OSCI/OSCO pins should be routed as a short differential pair if using a crystal, with the crystal placed within 5 mm of the IC. Analog inputs (AN0-AN11) should be routed away from digital switching signals to maintain ADC SNR above 70 dB. Leave an unconnected guard ring around sensitive analog traces connected to AVSS.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC24F32KA301-E/SO extended-temperature variant for industrial harsh environments. Lead-free and halogen-free per Microchip material composition disclosure.
