PIC24F04KA200-I/ST
PIC24F04KA200-I/ST - 16-bit XLP MCU 4KB Flash | Microchip
The Microchip Technology PIC24F04KA200-I/ST is a 16-bit PIC® microcontroller from the PIC24F eXtreme Low Power (XLP) family, integrating 4 KB Flash, 512 B RAM, and a 32 MHz CPU core in a 14-pin TSSOP package. Designed for power-constrained and battery-powered applications, the device combines a modified Harvard RISC architecture delivering up to 16 MIPS at 3.3 V with rich peripherals including a 10-bit 500 ksps ADC, deep-sleep brown-out reset (DSBOR), deep-sleep watchdog timer (DSWDT), and a real-time clock calendar (RTCC). The 3 V operating range and ultra-low-power modes target industrial-grade IoT sensors, wearable health monitors, and remote controls where quiescent current in nA range directly determines battery lifetime. The 14-TSSOP (ST) footprint occupies a tiny PCB area while exposing all essential I/O including UART, I2C, SPI, and up to 12 general-purpose I/O pins.
What is a 16-bit microcontroller? A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals such as ADC, timers, and communication interfaces. PIC24F devices use Microchip's modified Harvard architecture with separate program and data buses to allow simultaneous instruction fetch and data access, achieving deterministic throughput while retaining C-compiler friendliness through a 24-bit instruction word. Within the broader semiconductor taxonomy, an MCU sits under microcontrollers -> microprocessors -> logic ICs -> integrated circuits, and the PIC24F specifically targets ultra-low-power embedded applications.
Key features of the PIC24F04KA200-I/ST include 4 KB (1.375K x 24) self-programmable Flash with program-memory erase, 512 B SRAM, 10-bit 1.1 Msps ADC with up to 9 channels, five 16-bit timers, two UART modules, one SPI and one I2C peripheral, four capture inputs, and four PWM outputs. The integrated RTCC operates down to 1.8 V with an external 32.768 kHz crystal for calendar-aware sleep wake-ups. Multiple power-saving modes - Sleep, Idle, Deep Sleep, and Deep Sleep with RTCC - enable quiescent currents as low as 20 nA with full RAM retention, making the device a strong fit for energy-harvesting and primary-cell battery designs.
From an architecture perspective, the PIC24F04KA200 family uses a wide instruction pipeline with hardware multiply and divide, supporting both C and assembly development under MPLAB X IDE with the XC16 compiler. The internal 8 MHz oscillator with 4x PLL reaches the 32 MHz FOSC limit, and an auxiliary 31 kHz internal oscillator keeps RTCC timing during deep sleep. CIPs (Core Independent Peripherals) such as the Configurable Logic Cell and Peripheral Pin Select reduce the need for external glue logic, accelerating BOM cost and PCB area on tightly constrained designs.
Typical applications include IoT sensor nodes (BLE/Zigbee co-processor hosts), battery-powered remote controls, medical wearables such as glucose meters and pulse oximeters, industrial smart meters, consumer thermometers, and low-cost HVAC thermostats. The XLP feature set is equally well suited to e-metering and asset-tracking tags. A primary design consideration is correctly budgeting the deep-sleep wake current versus active-mode throughput: at 32 MHz the device draws roughly 8 mA, so designers should size tasks to minimize active dwell time. The 14-TSSOP footprint is a real-world surface-mount package shared across the PIC24F04KA201 / PIC24FV04KA200 variants, enabling straightforward PCB layout reuse.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
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