PIC18LF2680-I/SP
PIC18LF2680-I/SP - 8-bit MCU 64KB Flash ECAN 28-SPDIP | Microchip
The Microchip Technology PIC18LF2680-I/SP is an 8-bit PIC18F-family Flash microcontroller with integrated ECAN (Enhanced Controller Area Network), 64KB of program Flash memory, and 3328 bytes of RAM, housed in a 28-pin SPDIP (Skinny Plastic DIP) through-hole package. It runs at up to 40 MHz CPU clock from a 2.0V to 3.6V supply, with 1 KB of dedicated EEPROM and 25 general-purpose I/O pins, plus integrated ECAN, USART, MSSP (SPI/I2C), 10-bit ADC and 4 timers.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, I/O peripherals, and sometimes communication interfaces on one die. The PIC18 family is Microchip's 16-bit instruction-word, 8-bit data-width family of RISC microcontrollers, designed for embedded control applications that demand high code density, deterministic interrupts, and low power. The 'LF' prefix denotes the low-voltage variant optimised for 2.0V to 3.6V operation, while the 'F' variant typically runs from 4.2V to 5.5V. MCUs sit at the lowest tier of the embedded-computing hierarchy: MCU -> microcontroller -> embedded controller -> semiconductor IC.
Key features of the PIC18LF2680-I/SP include on-chip ECAN 2.0B active module with hardware filtering, a 10-bit ADC with up to 8 input channels, two analog comparators, two 8-bit timers and three 16-bit timers, an Enhanced Capture/Compare/PWM (ECCP) module, and nanoWatt Technology power-management modes. According to the verified distributor data, the device integrates 64KB (32K × 16) of Flash with self-programmability, 3328 bytes of SRAM, and 1KB of EEPROM. The 28-SPDIP package is the legacy through-hole footprint preferred for prototyping, education, and industrial modules that need user-replaceable parts.
On the architecture side, the PIC18LF2680 uses a 16-bit wide instruction set with single-cycle ALU operations, an 8-bit data path, hardware multiply, hardware FSR registers for C-pointer access, and a 32-level hardware stack. The ECAN engine implements ISO 11898-1 compliant CAN 2.0B active with acceptance filters, time-stamping, and bus-error counters, freeing the CPU from low-level framing. Internal RC and PLL options allow the system clock to be derived from the ECAN bit-rate quanta, an important detail when designing deterministic CAN networks.
Typical applications include industrial CAN-bus sensor nodes, automotive body-control and diagnostics modules, building-automation gateways, low-cost motor-control BLDC/H-bridge drivers, USB-CAN bridges, and embedded training kits where the 28-DIP package simplifies socket-based replacement. Designers also use this part for HVAC controllers, agricultural sensor transmitters, and SCADA I/O modules because of its wide industrial temperature grade and ECAN support.
Design consideration: when migrating firmware between PIC18LF2680 and the PIC18F2680 (5V variant), confirm both the VDD range and the Fosc configuration bits - the 3.3V regulator must not exceed 3.6V. The legacy SPDIP package has higher thermal resistance than modern QFN alternatives, so at full 40 MHz with all peripherals active in a sealed enclosure, derate the clock or add airflow. For new designs consider the K-series PIC18F25K80 as a modern functional equivalent in SOIC/QFN.
This page synthesises distributor pricing, parametric equivalents, and practical design notes not found in the standalone manufacturer datasheet.
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