PIC18F4682-E/P
PIC18F4682-E/P - 8-bit 40MHz 80KB Flash MCU w/ ECAN | Microchip
The Microchip Technology PIC18F4682-E/P is a high-performance 8-bit PIC18 RISC microcontroller delivering 10 MIPS at 40 MHz, with 80 KB of on-chip Flash program memory, 3328 bytes of RAM, and 1024 bytes of EEPROM, housed in a 40-pin PDIP through-hole package. The part integrates an Enhanced CAN (ECAN) module, a 10-bit ADC with up to 11 channels, and Microchip's nanoWatt power-management technology for sleep-mode current savings. The "/P" suffix denotes the 40-pin PDIP package, while the "-E" temperature grade extends the operating range from -40 °C to +125 °C, suitable for industrial and extended-environment applications.
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and peripheral interfaces. PIC18F MCUs are 8-bit Harvard-architecture parts within Microchip's PIC (Peripheral Interface Controller) family, belonging to the broader category of microcontrollers, embedded processors, and semiconductors. The PIC18F series targets mid-range embedded designs requiring higher code density and richer peripherals than baseline PIC16F parts, while remaining more cost-effective than 16-bit PIC24F/dsPIC or 32-bit ARM Cortex-M families. The "F" denotes Flash program memory, allowing in-system reprogramming via ICSP.
Key features of the PIC18F4682 include 80 KB self-programmable Flash with 10K erase/write cycles endurance, 3328 bytes SRAM, 1024 bytes EEPROM with 1M erase/write cycles endurance, the Enhanced CAN 2.0B module supporting up to 1 Mbps with hardware filtering, and a 10-bit ADC with 11 input channels and 16 acquisition time options. The device also integrates two USART modules, MSSP (SPI/I2C), two CCP/ECCP modules, a 16-bit timer/counter, three 8-bit timers, nanoWatt power management with deep sleep current in the nanoamp range, and an 8x8 hardware multiplier for DSP-style operations.
The PIC18F4682 is built on Microchip's enhanced Flash process technology with on-chip debugging via ICD breakpoints and run-time reads. The ECAN module provides message acceptance filters, time stamping, and FIFO buffering, reducing host CPU load in CAN networks. The nanoWatt technology offers multiple idle modes (Idle, Deep Sleep, Sleep, and an ultra-low-power Real-Time Clock mode) that drop supply current substantially, enabling battery-backed designs.
Typical applications include industrial CAN-bus nodes, automotive body and chassis ECUs (CAN sub-bus), HVAC controls, building automation, smart metering, motor control with ECAN feedback, medical instrumentation, and embedded control systems that require network connectivity alongside analog and digital I/O. The ECAN integration is the principal differentiator: where competing 8-bit MCUs require an external CAN controller such as the MCP2515, the PIC18F4682 places the CAN MAC on-chip.
When designing with the PIC18F4682-E/P, verify Vdd decoupling with 100 nF plus bulk capacitors, route the CAN bus with proper 120-ohm termination at each end, and select between 20 MHz and 40 MHz operation modes using the internal PLL. The ICSP programming pins (PGC/PGD) must be accessible for in-system programming, and the MCLR reset pin should be pulled up through a 10 kohm resistor with optional capacitor for noise immunity.
This page consolidates distributor pricing, parametric comparisons against 7 alternatives, application context, and engineering design notes beyond what the manufacturer datasheet alone provides.
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