PIC18LF2680-I/SO - 8-bit 40MHz 64KB Flash MCU with ECAN | Microchip
MPN: PIC18LF2680-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.1 | $71.00 |
| 100 | $6.32 | $632.00 |
| 500 | $5.68 | $2,840.00 |
| 1,000 | $5.05 | $5,050.00 |
PIC18LF2680-I/SO Overview
An 8-bit microcontroller (MCU) is a programmable processor that executes instructions on 8-bit data words, integrating CPU, memory (Flash for program, SRAM for variables), and peripherals onto one chip. Microcontrollers sit below microprocessors in the embedded hierarchy: MCU = microprocessor core + memory + peripherals in a single IC, optimized for control rather than raw compute. Within Microchip's portfolio, the PIC18F family occupies the high-performance 8-bit tier, and the PIC18F26xx sub-family specifically adds an integrated CAN 2.0B controller for automotive and industrial networking.
Key features include hardware ECAN 2.0B with acceptance filters, 10-bit ADC up to 8 channels, enhanced USART, MSSP (SPI/I2C), two analog comparators, and nanoWatt technology power management. The 64KB Flash is organized as 32K x 16 words, allowing word-aligned access. An ICD/ICSP debug port is provided for in-circuit development with MPLAB tools.
Typical applications include automotive body and comfort ECAN nodes, industrial sensor buses, HVAC controllers, building automation, and CAN-based battery management. The 28-SOIC footprint provides a wide, easy-to-solder outline well-suited to hand-prototyping and through-air rework.
When designing with this part, mind the 2.0V minimum VDD for LF operation, and ensure ECAN bus termination (120 ohm at each end) and proper transceiver selection such as MCP2551 or MCP2561.
Drop-in alternatives for PIC18LF2680-I/SO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18LF2680-I/SO (same form factor and footprint) — differing in Package, Operating Temperature, Timers, Mounting Type, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2680-I/SO
✅ Drop-In✓ In Stock
$5.62 / Unit
View Datasheet →PIC18F2680-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2680T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.21 / Unit
View Datasheet →PIC18F2610-I/SO
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC18F2580-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2680-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC18F 8-bit RISC |
| Program Memory | 64 KB Flash (32K x 16 words) |
| Data Memory (RAM) | 3328 bytes |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage (VDD) | 2.0 V to 5.5 V (LF variant) |
| Operating Temperature | -40C to +85C (industrial, "I" grade) |
| Package | 28-pin SOIC (300 mil, "SO") |
| Mounting Type | Surface Mount |
| CAN Controller | ECAN 2.0B active with acceptance filters |
| UART | 1x Enhanced USART (EUSART) |
| SPI | Yes (via MSSP) |
| I2C | Yes (via MSSP, Master/Slave) |
| Comparators | 2 analog comparators |
| ICSP/ICD Debug | Yes |
| RoHS Status | Compliant |
PIC18LF2680-I/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (active low) / ICSP programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA7 — Crystal/clock input / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal/clock output / PORTA bit 6 |
| Pin 11 | RC0/T1CKI — PORTC bit 0 / Timer1 clock input |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (2.0V-5.5V for LF) |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18LF2680-I/SO is suitable for 6 applications: Automotive Body ECAN Nodes, Industrial Sensor Bus Nodes, HVAC and Building Automation Controllers, Battery Management CAN Nodes, CAN-Based Distributed Motor Control, Portable Medical Diagnostic Devices.
Automotive Body ECAN Nodes
The PIC18LF2680-I/SO's integrated ECAN 2.0B controller with acceptance filters makes it ideal for body-electronics ECAN nodes that exchange messages with door modules, lighting controllers, and instrument clusters. The 28-SOIC package's 300-mil body and wide pitch ease hand-soldering during prototype bring-up, while production runs use standard SMT reflow. With 64KB Flash and 3328 bytes RAM, the part can run a CANopen or J1939 lightweight stack plus diagnostics; bus termination uses 120 ohm at each end and a transceiver such as MCP2551. Compared with older PIC18F458 parts, the LF suffix allows direct 3.3V rail operation without a regulator.
Recommended
Industrial Sensor Bus Nodes
In factory-automation backplanes using CAN as the sensor backbone, the PIC18LF2680-I/SO provides sufficient MIPS (10 MIPS peak at 40 MHz) and Flash (64KB) to implement sensor linearization, calibration, and ECAN message packing. The LF voltage range (2.0V-5.5V) supports both legacy 24V-derived 5V rails and modern 3.3V I/O domains. Integrated 10-bit ADC and two analog comparators handle raw analog sensor signals; enhanced USART bridges to RS-485 or RS-232 when needed. The 28-SOIC's wide pitch improves manufacturability in mixed-technology panels with both SMD and through-hole sensors.
Recommended
HVAC and Building Automation Controllers
Building-automation nodes need to actuate dampers, fans, and valves while talking to a central ECAN or CANopen master - a workload well-suited to the PIC18LF2680-I/SO's 64KB Flash and 40 MHz CPU. The 10-bit ADC reads thermistor/resistive temperature sensors, while PWM timers drive triac-trigger circuits for heater control. The "I" temperature grade (-40C to +85C) covers unconditioned plant-room environments, and the LF's low-voltage tolerance accommodates remote battery-backed operation. MSSP peripherals drive I2C-based temperature/humidity sensor front-ends such as the MCP9808 family.
Recommended
Battery Management CAN Nodes
Portable medical, e-mobility, and robotics systems use ECAN to broadcast per-cell battery telemetry. The PIC18LF2680-I/SO is a strong fit because the LF 2.0V minimum allows direct 2S Li-Ion (7.4V via LDO to 3.3V) and 1S Li-Ion (3.7V) operation; the 28-SOIC package survives conformal coating and potting used in battery packs. With 3328 bytes RAM and 64KB Flash, the part can run coulomb counting plus ECAN message formatting without external memory. Designers pair the MCU with a CAN transceiver and an ADC front-end such as the MCP3421 for cell-voltage monitoring.
Recommended
CAN-Based Distributed Motor Control
Small distributed motor drives (fans, pumps, conveyor rollers) use PIC18LF2680-I/SO as the per-node controller, taking torque/speed commands from a CAN master and driving a gate-driver or H-bridge via PWM. The 40 MHz CPU handles Field-Oriented Control for low-pole-count BLDC motors and the ECAN peripheral keeps bus latency low. The 28-SOIC package dissipates up to ~1W comfortably when the JLDST020 reflow profile is followed, with copper-pour heatsinking. Programmer-signal protocols such as CANopen DS-301/DS-402 are easily hosted in 64KB Flash.
Recommended
Portable Medical Diagnostic Devices
Portable medical instruments (handheld ultrasound probes, pulse oximeters, point-of-care analyzers) demand a low-voltage, low-power 8-bit MCU with reliable communication - a profile matching the PIC18LF2680-I/SO. The LF 2.0V minimum extends runtime on partially-depleted Li-Ion packs, while ECAN links the device to a CAN-connected bedside monitor or charging cradle. The 10-bit ADC handles sensor front-ends and the MSSP drives SPI OLED displays. Industrial temperature grade plus the 28-SOIC's rework-friendly 300-mil body simplify service and field upgrades through ICSP.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2680-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2680-I/SO | PIC18F2680-E/SO | PIC18LF2680T-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (300 mil) | 28-SOIC (300 mil) | 28-SOIC (300 mil) | 28-SOIC (300 mil) |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB |
| RAM | 3328 bytes | 3328 bytes | 3328 bytes | 3328 bytes |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Voltage | 2.0V-5.5V (LF) | 4.2V-5.5V (F) | 4.2V-5.5V (F) | 2.0V-5.5V (LF) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| ECAN Controller | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Active | Active |
Key Differentiators
- Wide low-voltage operating range 2.0V-5.5V (vs PIC18F2680-I/SO)
- Industrial -40C to +85C temperature range as standard (vs PIC18F2680-E/SO (extended))
- Pin-to-pin compatible with the broader PIC18F26xx family (vs PIC18F2610-I/SO (48KB Flash))
Design Notes
The LF suffix denotes low-voltage operation down to 2.0V VDD, but maximum CPU frequency must be derated below ~3V per the datasheet frequency-vs-voltage curves. At 40 MHz, VDD must be >= 4.2V; at 4 MHz the part can run on the full 2.0V-5.5V range. Add a bulk 10uF ceramic + 100nF decoupling pair close to VDD (pin 20) and a second 100nF near VSS (pin 19) to handle switching transients during ECAN transmission. nanoWatt technology modes (Sleep, Idle, Run) reduce Iq below 1uA for battery-powered designs.
Never drive the CAN bus pins directly - the PIC18LF2680-I/SO outputs only CANTX and CANRX logic levels. An external CAN transceiver such as MCP2551 (5V) or MCP2561 (3.3V) is mandatory to meet ISO 11898 bus levels and to provide bus-fault protection. Also note that the LF variant must NOT be operated below 2.0V even in Sleep mode without re-asserting Brown-Out Reset thresholds; configure BOR in the CONFIG words to guarantee clean reset behavior at low VDD.
The 28-SOIC (300-mil) footprint is wider than the 8-pin SOIC and demands a land pattern per JEDEC MS-013 with 1.27mm pitch. Place the decoupling capacitor within 2mm of the VDD pin, route the ICSP/ICD signals (RB6/PGC, RB7/PGD, MCLR/VPP) to a 5-pin header compatible with MPLAB ICD 4/5, and place a 4-pin CAN header near the CANTX/CANRX GPIO for transceiver breakout. Keep the crystal traces short and guard-ring the oscillator area to avoid noise injection on ECAN timing.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 qualification is NOT claimed for the standard grade; for under-hood automotive ECAN nodes requiring AEC-Q100, designers must use automotive-grade PIC18 variants explicitly marked Q1 in the part number.
