PIC18F25K42-I/SS

The PIC18F25K42-I/SS is Microchip’s 8‑bit PIC18 microcontroller in a 28‑pin industrial‑temp package (I/SS = Industrial temp range, SSOP/SOIC). It’s designed for USB-enabled, small embedded systems.
Key points
- Core and speed: 8‑bit PIC18 architecture with fast operation suitable for USB device code (no external USB chip required).
- USB: Full‑Speed USB device interface (12 Mbps) for simple PC/USB peripherals.
- Memory: On‑chip Flash for program storage, RAM for data, and EEPROM for nonvolatile data (sizes are in the tens–hundreds of KB range for Flash/RAM typical of this family; check the datasheet for exact numbers).
- Peripherals: Multiple UARTs, SPI/I2C (MSSP), multiple timers, PWM outputs, 10-bit ADC with several channels, analog comparator options, and interrupt sources.
- I/O and power: Several GPIOs; operates from ~2.0 to 5.5 V; supports low‑power modes suitable for battery-powered designs.
- Development: Supported by MPLAB X IDE and the XC8 compiler; Microchip USB framework and example code available.
- Applications: USB peripheral devices, data logging, small USB sensors, HID/CDC USB applications, and other USB‑enabled controllers.
For exact memory sizes, pin counts, and USB features, consult the PIC18F25K42 datasheet and device family reference.

Concise features of PIC18F25K42-I/SS:
- 8‑bit PIC18 core, Harvard architecture
- 28‑pin package (Industrial temperature range; /SS suffix for SSOP/SOIC option)
- Memory (device dependent): up to ≈25 KB Flash; ≈2 KB RAM; ≈1 KB EEPROM
- Analog: 10‑bit ADC with multiple channels
- Serial peripherals: EUSART (UART), I2C (MSSP), SPI
- Timers and PWM: Timer0/1/2 plus Timer3; CCP/PWM outputs
- Peripheral Pin Select (PPS) for flexible I/O mapping
- Reset and protection: Brown‑out Reset, Watchdog Timer, Low‑Voltage Programming (LVP), code protection
- Clock: internal/external oscillator, typically up to ~32 MHz
- Power: operating voltage 2.0–5.5 V
- Low‑power modes: Sleep/Idle for reduced power consumption
Note: exact memory sizes and features vary by package/stepping; consult the datasheet for precise specifications.

Industrial-temperature, 28-pin SSOP (Small-Outline) package.

- Pin count: 28 pins
- Function: 8-bit PIC microcontroller (PIC18F25K42) for general embedded control; includes on-chip memory, I/O ports, ADC, timers, and serial interfaces.

- Manufacturer: Microchip Technology Inc.
- What kind of company: An American multinational semiconductor company that designs and sells microcontrollers (and related peripherals), memory, and analog components for embedded control applications.

PIC18F25K42-I/SS is a general‑purpose 8‑bit MCU for cost‑optimized embedded designs. Typical application areas include:
- Industrial automation, sensing and I/O control
- Consumer electronics and home automation
- Instrumentation, data logging and panel meters
- Battery-powered portable devices
- Small robotics and motor control
- Automotive body electronics and sensors
- IoT and remote monitoring
- Education, prototyping and hobbyist projects