PIC18LF25K22-E/SO
PIC18LF25K22-E/SO - 8-bit 48MHz 32KB Flash XLP MCU | Microchip
The Microchip Technology PIC18LF25K22-E/SO is an 8-bit PIC18 family microcontroller built on a high-performance RISC architecture with nanoWatt XLP extreme-low-power technology. It integrates 32KB of Flash program memory (16K x 16 words), 1536 bytes of SRAM, and 256 bytes of EEPROM, and executes instructions at up to 48 MHz (16 MIPS) from a 1.8V-3.6V supply. Housed in a 28-pin SOIC (SO) wide-body 7.50 mm package, the device targets low-power embedded designs where active current draw and deep-sleep retention are critical.
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a rich set of peripherals such as timers, ADC, comparators, PWM, UART, and I/O ports. PIC microcontrollers belong to the PIC18 family, a Harvard-architecture 8-bit line known for deterministic interrupt response, simple assembly and C programming via MPLAB X, and a mature toolchain. Within Microchip's portfolio, PIC18 sits between PIC16 and PIC24/dsPIC, balancing cost, code density, and peripheral integration. The 'LF' prefix denotes the low-voltage variant (1.8-3.6V), the 'F' denotes Flash program memory, the '25K22' is the family code (32KB Flash), and the 'E/SO' suffix specifies the Extended (-40C to +125C) temperature grade in a 28-pin SOIC.
Key differentiating features include the nanoWatt XLP technology for sub-microamp sleep currents, an integrated 10-bit ADC with up to 17 channels, mTouch capacitive-touch support, two analog comparators with a reference ladder, two CCP/ECCP modules for PWM and motor control, an enhanced USART with LIN support, two MSSP modules for SPI/I2C, and an internal 16 MHz oscillator with PLL for 48 MHz operation. Peripherals can be individually disabled to minimize dynamic power.
The PIC18LF25K22's XLP technology delivers typical sleep currents below 1 uA (per datasheet typical characteristics) with retention from a 1.8V supply, while the 16 MIPS core supports real-time control loops. The 28-pin SOIC provides ample I/O (24 general-purpose pins plus dedicated oscillator and programming lines) while remaining compatible with hand-soldering and breadboard prototypes. Code is developed in MPLAB X IDE with XC8 compilers and debugged via ICSP on the same pins used for programming.
Typical applications include battery-powered IoT sensor nodes, capacitive-touch human-machine interfaces, low-power wireless sensor peripherals, portable medical monitors, and industrial sensor conditioning. The combination of XLP sleep current and rich analog integration allows direct connection to resistive bridges, thermistors, and capacitive electrodes without an external analog front end. The E (Extended) temperature grade suits outdoor and automotive under-hood environments.
Designers should note that migrating between PIC18LF25K22 (LF, low-voltage) and PIC18F25K22 (F, 1.8-5.5V) requires verifying the application supply rail: connecting a 5V rail to a 'LF' part will damage it. The SOIC-28 footprint is shared with many PIC18 K-series devices, easing migration.
This page consolidates distributor pricing, drop-in alternatives in the same 28-SOIC footprint, and practical design notes to help engineers select and apply the PIC18LF25K22-E/SO quickly and correctly.
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