PIC24F32KA301-I/SO
PIC24F32KA301-I/SO - 16-bit 32MHz 32KB Flash XLP MCU | Microchip
The Microchip Technology PIC24F32KA301-I/SO is a 16-bit PIC microcontroller in the PIC24F XLP family with eXtreme Low Power technology, packaged in a 20-pin SOIC (300 mil). It integrates 32KB of Flash program memory, 2KB of SRAM, and 512B of EEPROM, and runs at up to 32 MHz (16 MIPS) from a 1.8-3.6V supply. The device is designed for power-constrained and battery-powered applications and includes peripherals such as a 12-bit ADC, CTMU (Charge Time Measurement Unit), DSBOR, DSWDT, and a Real-Time Clock/Calendar that continues to operate in Deep Sleep mode.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), non-volatile data storage (EEPROM), and a rich set of peripherals (ADC, timers, communication controllers) into one package. The PIC24F belongs to the modified Harvard RISC architecture family from Microchip and sits between 8-bit PIC16/PIC18 devices and the more powerful dsPIC33/PIC32 lines, offering 16-bit data paths, single-cycle multiply, and a deterministic instruction set optimized for low-power embedded control.
Key features include nanoWatt XLP technology with Deep Sleep currents drawn in the microampere range, a 12-bit A/D converter with multiple channels, multiple serial interfaces (UART, SPI, I2C), and a Charge Time Measurement Unit for capacitive touch sensing and precise time-of-flight measurements. The wide 1.8V to 3.6V VDD range supports both 3V lithium and 2x AA battery chemistries without level shifters, and the internal 8 MHz and 32 kHz oscillators reduce external component count. The 20-pin SOIC footprint offers the largest I/O count in this family while remaining hand-solderable for prototypes and low-volume production.
The architecture combines a 16-bit modified Harvard RISC core with a 24-bit instruction word, 17 x 17-bit single-cycle hardware multiplier, and a 32-bit barrel shifter, delivering 16 MIPS throughput while drawing only microampere-level active current. The Deep Sleep state retains RAM and runs the RTCC, DSBOR and DSWDT, allowing wake-up intervals of seconds to months on a single coin cell. The CTMU provides a precise current source for capacitive touch and resistive sensing without an external analog front end.
Typical applications include blood pressure monitors, fitness wearables, remote sensor nodes, smart thermostats, IoT endpoints, and any portable medical or industrial sensor. The combination of eXtreme Low Power, 32 KB Flash, 12-bit ADC, and CTMU makes it particularly well suited to capacitive-touch user interfaces and battery-powered measurement products. The 20-pin SOIC package allows easy hand-soldering and rework, simplifying prototyping and field-repair scenarios.
When designing with this device, choose low-Iq LDO or use direct battery connection, route the analog AVdd/AVss pins with a star ground topology, and place the CTMU current-source traces away from switching nodes to preserve touch sensitivity. For longest battery life, prefer Deep Sleep over Idle and gate peripherals individually using PMD registers rather than software polling loops.
This page synthesizes distributor pricing, same-family Microchip drop-in alternatives, and practical low-power design notes not found in the manufacturer datasheet alone.
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