PIC18F6680-E/L
PIC18F6680-E/L - 64KB Flash 8-bit MCU w/ECAN | Microchip
The Microchip PIC18F6680-E/L is a high-performance 8-bit RISC microcontroller with 64 KB of enhanced Flash program memory, 3328 bytes of RAM, and 1024 bytes of data EEPROM, housed in a 68-pin PLCC (J-lead) package. It runs at up to 40 MHz clock speed and operates from 4.2 V to 5.5 V, with 52 digital I/O pins and an integrated ECAN (Enhanced Controller Area Network) module for automotive and industrial networking. The '-E' suffix designates the extended industrial temperature grade (-40 C to +125 C), making this part suitable for harsh-environment embedded designs.
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory (Flash/ROM), volatile data memory (RAM), non-volatile data storage (EEPROM), and a rich set of peripherals (timers, ADC, communication modules, GPIO) on a single silicon die. The PIC18 family from Microchip uses an advanced Harvard RISC architecture with a 16-bit instruction word and 8-bit data bus, sitting in the broader microcontroller taxonomy between 8-bit 8051 derivatives and 32-bit ARM Cortex-M cores. Within power management and embedded control hierarchies, the PIC18F6680 belongs to the PIC18F6X8X sub-family, which is Microchip's high-pin-count branch for CAN-connected industrial nodes.
Key features include 10 MIPS performance at 40 MHz, hardware ECAN module (CAN 2.0B active), 12-bit ADC, multiple USART/SPI/I2C peripherals, 4 timers, and nanoWatt technology for low-power sleep modes. The 1024-byte EEPROM supports 1 million erase/write cycles typical, and the Flash program memory supports 100k erase/write cycles. The ECAN module supports both standard and extended identifiers and includes advanced filtering, which is essential for message-rich automotive networks.
The PIC18F6680's architecture pairs the 8-bit data ALU with a 16-bit instruction pipeline, achieving throughput comparable to many 16-bit microcontrollers while retaining the simplicity of 8-bit code. The ECAN peripheral offloads message filtering and arbitration from the CPU, freeing cycles for application logic, while nanoWatt power management supports run, idle, and sleep modes with microamp quiescent currents.
Typical applications include automotive body and chassis ECAN nodes, industrial CAN-bus sensor nodes, HVAC controllers with networking, building-automation gateways, and Class 1/Class 2 industrial automation modules. The wide temperature grade and integrated ECAN make it a strong fit for any CAN-based distributed-control system that needs automotive-grade reliability at industrial price points.
When designing with this device, follow Microchip's recommended decoupling (100 nF on every VDD/VSS pair), keep the ECAN bus traces impedance-matched to 120 ohm, and validate the brown-out and watchdog configuration against your system-level fault-recovery strategy. The 68-pin PLCC package is socket-compatible with many legacy designs, simplifying field upgrades.
This page synthesizes distributor pricing, drop-in PIC18 alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and firmware engineers a single source for sourcing, replacement, and design-decision data.
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