PIC18LF24J11-I/SP
PIC18LF24J11-I/SP - 8-Bit 48MHz 16KB Flash XLP MCU | Microchip
The Microchip Technology PIC18LF24J11-I/SP is an 8-bit PIC18J-series microcontroller featuring 16KB of Flash program memory, 48MHz maximum clock speed, and ultra-low-power XLP (eXtreme Low Power) technology, housed in a 28-pin SPDIP (SP) through-hole package. The 'LF' prefix designates the 2.5V/3.3V low-voltage variant optimized for battery-powered and energy-harvesting designs, while the 'I' suffix denotes the industrial -40C to +85C operating temperature range. The device integrates a 10-bit ADC, multiple communication peripherals (I2C, SPI, UART/USART), and brown-out detect/reset, POR, PWM, and WDT peripherals.
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data memory, and integrated peripherals. The PIC18 family uses Microchip's enhanced RISC architecture with a Harvard-style memory layout, separating program (Flash) and data (RAM) buses for predictable instruction execution. Within Microchip's taxonomy, the PIC18LF24J11 sits at the intersection of 8-bit MCU -> Flash MCU -> nanoWatt XLP -> PIC18J-series, giving engineers a balance of code density, peripheral flexibility, and sub-microamp sleep current. The 'J' series specifically targets cost-sensitive applications requiring deep-sleep current as low as 20nA typical, making it ideal for always-on sensor nodes.
Key features include 16KB (8K x 16) Flash program memory, 3.68KB data RAM, 16 programmable I/O pins, and Peripheral Pin Select (PPS) for flexible signal routing. The 48MHz internal oscillator (equivalent to 12 MIPS throughput) eliminates external crystal requirements in many designs, while the 10-bit ADC with up to 10 channels supports direct sensor interfacing. Deep-sleep current of approximately 20nA extends battery life in dormant IoT endpoints, and the on-chip 2.5V/3.3V LDO regulator allows direct connection to a single Li-ion cell or two AA cells.
Architecturally, the PIC18LF24J11 uses a 16-bit instruction word optimized for C-compiled code density, with 31-level hardware stack and interrupt-priority arbitration. The nanoWatt XLP feature set includes multiple low-power modes (Run, Idle, Sleep, Deep Sleep), enabling dynamic power scaling based on application workload. JTAG/ICSP debugging is supported through standard 2-wire or 4-wire interfaces.
Typical applications include battery-powered sensor nodes, IoT edge devices, low-energy wireless sensor hubs, portable medical monitors, remote controls, energy harvesting systems, consumer electronics with sleep-dominant duty cycles, and industrial control modules requiring extended battery life. The 28-pin SPDIP package supports hand-soldering and breadboard prototyping, which suits engineers transitioning from development to small-batch production.
When designing with this device, choose the LF variant for sub-3.3V operation; switch to the standard F variant (e.g. PIC18F24J11-I/SP) for 3.3V-only or 5V-tolerant applications. Maintain VDD decoupling within 5mm of the supply pin (100nF plus 10uF bulk) and respect the absolute maximum VDD of 3.6V for LF parts to avoid latch-up.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including a curated comparison against same-family SPDIP variants and a 28-pin cross-reference matrix.
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