PIC18LF2682-I/SO - 8-bit 40MHz MCU 80KB Flash ECAN 28-SOIC | Microchip
N.º da peça: PIC18LF2682-I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.45 | $8,45 |
| 10 | $7.92 | $79,20 |
| 100 | $7.15 | $715,00 |
| 500 | $6.62 | $3.310,00 |
| 1.000 | $6.05 | $6.050,00 |
PIC18LF2682-I/SO Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), and programmable I/O peripherals on one die. The PIC18 family is Microchip's high-performance 8-bit line, featuring a 16-bit instruction word, hardware multiplier, and 31-level stack. The "LF" prefix designates the low-voltage F-version that supports 2.0V-5.5V operation (industrial, 2.5V/3.3V/5V common rails), while the "F" (without L) version supports 4.2V-5.5V only. The PIC18LF2682 specifically adds an ECAN peripheral - CAN 2.0B with filtering and masking - making it part of Microchip's "connected" MCU tier for industrial networking.
Key features include a 40 MHz maximum clock (10 MIPS instruction throughput), 34 digital I/O pins, a 10-bit ADC with up to 11 channels, two enhanced USART modules, two MSSP (SPI/I2C) ports, and four 8-bit/16-bit timers. The integrated ECAN module supports CAN 2.0B active with bus speeds up to 1 Mbit/s, DeviceNet and CANopen compatibility, and hardware acceptance filters that offload message handling from the CPU. The 28-SOIC package provides a 7.50 mm body width suited for hand-soldered prototypes and through-hole-friendly board edges.
Architecturally, the PIC18LF2682 uses a Harvard RISC core with single-cycle ALU operations, a hardware 8x8 multiplier, and a C-optimizing instruction set. The ECAN engine implements the Bosch CAN 2.0B specification in hardware with 6 acceptance masks and 14 acceptance filters, enabling protocol-level filtering without CPU intervention. The internal 10-bit ADC supports both single-ended and differential conversions with sleep-mode auto-trigger for low-power sensing.
Typical applications include industrial CAN-bus nodes (sensor aggregation, motor control status reporting), automotive body and chassis ECUs (non-safety subsystems), building automation HVAC controllers, and embedded control boards requiring 5V-tolerant I/O without a separate transceiver. The wide VDD range also supports battery-backed systems running at 3.3V from a coin cell or Li-ion source.
When designing with this part, ensure the CAN bus termination, biasing, and external transceiver (e.g. MCP2551 or MCP2562) are correctly matched to the ECAN TX/RX pins. Use Microchip's MPLAB X IDE with the XC8 compiler for firmware development, and confirm in-system programming via ICSP for production programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para PIC18LF2682-I/SO — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF2682-I/SO (mesmo formato e footprint) — diferindo em Operating Temperature, Package, Timers, ADC, EEPROM.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF2682T-I/SO
✅ Drop-In✓ Em estoque
$3.98 / unidade
Ver ficha técnica →PIC18LF2682-E/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F2682-I/SO
✅ Drop-In✓ Em estoque
$5.02 / unidade
Ver ficha técnica →PIC18LF2685-I/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF2682-I/SO Classificações máximas e características elétricas
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 80 KB (40K x 16 words) |
| RAM | 3.25 KB (3328 bytes) |
| EEPROM | 1 KB (1024 bytes) |
| Maximum Clock Speed | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Digital I/O Pins | 34 |
| ADC | 10-bit, up to 11 channels |
| CAN Module | ECAN (CAN 2.0B active), up to 1 Mbit/s |
| UART | 2x Enhanced USART |
| SPI/I2C | 2x MSSP (SPI / I2C) |
| Timers | 4 (8-bit / 16-bit) |
| Encapsulamento | 28-SOIC (SO, 7.50 mm wide body) |
| Temperatura de operação | -40 C to +85 C (Industrial) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 1 (unlimited floor life at <30 C / 85% RH) |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF2682-I/SO
| Pino 1 | MCLR/RE3 — Master Clear (reset) input / PORTE bit 3 |
| Pino 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pino 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pino 8 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input / PORTA bit 7 |
| Pino 9 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| Pino 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pino 12 | RC2/CCP1 — PORTC bit 2 / CCP1 output |
| Pino 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART synchronous clock |
| Pino 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART synchronous data |
| Pino 18 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pino 19 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pino 20 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pino 21 | RB3/INT3/ECCP2 — PORTB bit 3 / external interrupt 3 / enhanced CCP2 |
| Pino 22 | RB4 — PORTB bit 4 |
| Pino 23 | RB5 — PORTB bit 5 |
| Pino 24 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pino 25 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pino 26 | VSS — Ground |
| Pino 27 | VDD — Positive supply voltage |
| Pino 28 | RB7/PGD/RE0/AN5 — PORTB / PORTE multiplexed - see datasheet; alternate functions AN5 |
Aplicações típicas
PIC18LF2682-I/SO é adequado para 6 aplicaçãos: Industrial CAN-Bus Sensor Nodes, Automotive Body and Chassis ECUs, Building Automation HVAC Controllers, Battery-Backed 3.3V Embedded Control, Industrial Sensor Aggregator / Gateway, Industrial Servo and Stepper Drive Interface.
Industrial CAN-Bus Sensor Nodes
The PIC18LF2682-I/SO is purpose-built for industrial CAN-bus sensor nodes. Its integrated ECAN module implements CAN 2.0B active with hardware acceptance masks and filters (6 masks, 14 filters per the Microchip datasheet), offloading message filtering from the CPU. The 80 KB Flash stores a full CANopen or DeviceNet stack plus application code, while 3.25 KB RAM provides CAN frame buffers without external memory. With 2.0V-5.5V operation the part runs directly from a 3.3V regulated rail, simplifying power-tree design. Pair the MCU with a Microchip MCP2562 CAN transceiver for a complete isolated node. The 28-SOIC package fits compact DIN-rail modules and IP65 sensor heads where board area is limited and ECAN bandwidth (up to 1 Mbit/s) handles typical 250 kbit/s and 500 kbit/s industrial networks.
Recomendado
Automotive Body and Chassis ECUs
The PIC18LF2682-I/SO fits non-safety automotive body and chassis ECUs such as window lift modules, seat controllers, mirror adjusters, and climate-control nodes. Its ECAN peripheral supports 1 Mbit/s bus speeds used in modern vehicle networks, and the industrial -40 C to +85 C operating range covers cabin environments. The 10-bit ADC samples up to 11 analog channels for potentiometer position, temperature, and current feedback. For under-hood or safety-critical ECUs the extended-temperature -40 C to +125 C PIC18LF2682-E/SO variant is required, since the standard part is only specified to +85 C. Note that this MCU is NOT AEC-Q100 qualified; for safety-critical applications choose an AEC-Q100 PIC18 variant or a dsPIC33 from Microchip's automotive line.
Recomendado
Building Automation HVAC Controllers
Building automation HVAC and ventilation controllers benefit from the PIC18LF2682-I/SO's combination of ECAN, multiple timers, and a 10-bit ADC. The MCU drives three-phase motor PWM via its CCP/PWM peripherals while reading thermistor and pressure sensors through the ADC. ECAN connects the controller to a building-wide BACnet or CANopen network, with hardware acceptance filters isolating local messages from the bus. The 2.0V-5.5V supply range supports battery-backed RTC operation during power outages, while 80 KB Flash is ample for zoning logic, scheduling, and Modbus/CANopen protocol stacks. The 28-SOIC package allows hand-repairable assembly, valuable for field-installed building controllers that service technicians must maintain.
Recomendado
Battery-Backed 3.3V Embedded Control
The PIC18LF2682-I/SO's 2.0V-5.5V VDD range makes it ideal for battery-backed embedded controllers running from a 3.3V LDO fed by a Li-ion cell or supercapacitor. Low-power sleep modes combined with ECAN wake-on-message support allow nodes to sleep until a CAN frame is received, drawing only microamps in standby. The 80 KB Flash stores configuration and runtime logs in the 1 KB byte-addressable EEPROM, which survives power cycles without external FRAM. Applications include portable test equipment, remote sensor data loggers, and field service instruments. The 28-SOIC wide-body package remains hand-solderable, which is helpful for prototype and low-volume production runs.
Recomendado
Industrial Sensor Aggregator / Gateway
A CAN-to-UART sensor aggregator or gateway uses the PIC18LF2682-I/SO to consolidate messages from multiple ECAN nodes and forward them over one of the two enhanced USARTs. The 40 MHz / 10 MIPS throughput handles typical 250-500 kbit/s CAN traffic plus buffering for UART transmission. The 34 digital I/O pins drive indicator LEDs, configuration DIP switches, and discrete status outputs. Its 10-bit ADC reads system-level voltage and temperature. The same 28-SOIC footprint fits gateway boards that aggregate up to 16 sensor nodes; the larger 80 KB Flash budget over the related PIC18LF2580 (32 KB) makes this part the right pick for gateway firmware that handles protocol translation and onboard diagnostics.
Recomendado
Industrial Servo and Stepper Drive Interface
Industrial servo and stepper drive interfaces integrate CANopen motion-control commands with on-board analog sensing. The PIC18LF2682-I/SO accepts CANopen PDOs (Process Data Objects) over its ECAN module, decodes position/torque commands, and generates step/direction or PWM signals through its CCP modules. The 10-bit ADC reads motor current shunt amplifiers for closed-loop torque control, while the ECAN hardware filters isolate axis-local messages from the multi-axis bus. With 80 KB Flash, the MCU stores the full CANopen DSP-402 device profile plus custom vendor objects. The 28-SOIC package mounts directly on small stepper-driver PCBs, reducing board size versus 40-pin DIP alternatives.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF2682-I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF2682T-I/SO | PIC18LF2682-E/SO | PIC18F2682-I/SO | PIC18LF2685-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory (Flash) | 80 KB | 80 KB | 80 KB | 80 KB | 96 KB |
| RAM | 3.25 KB | 3.25 KB | 3.25 KB | 3.25 KB | 3.8 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| CAN Module | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) |
Principais diferenciais
- Integrated ECAN module with hardware filtering (vs PIC18LF2580-I/SO)
- Large 80 KB Flash vs. smaller 8-bit MCU families (vs PIC18LF2580-I/SO)
- Low-voltage F variant for 2.0V-5.5V operation (vs PIC18F2682-I/SO)
Notas de projeto
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 27) and a bulk 10 uF capacitor on the same supply trace. Use short, wide ground returns to VSS (pin 26). For the second VDD/AVDD rail, decouple analog VDD with an additional 0.1 uF + 10 uF pair to suppress ADC reference noise. Avoid routing high-speed digital signals under the IC to minimize switching noise coupling into the analog inputs.
The CAN TX (RC6) and RX (RC7) pins must be routed as a matched-length differential pair to the external MCP2551 or MCP2562 transceiver with characteristic impedance of 120 ohms. Place the transceiver within 50 mm of the MCU to keep stub lengths short. Add a 4.7 kohm termination resistor at the bus ends; failure to terminate CAN properly causes bit errors above 125 kbit/s due to reflections.
Do not confuse the LF version (PIC18LF2682, 2.0V-5.5V) with the F version (PIC18F2682, 4.2V-5.5V) when reading brown-out and oscillator configuration registers - the F version lacks low-voltage BOR settings. Also note that pin 28 on the 28-SOIC is multiplexed between PORTB bit 7 (PGD/ICSP) and PORTE/AN5 in some datasheet revisions; consult the pinout table for the exact package variant before laying out analog traces.
When operating at 40 MHz with all peripherals active, the PIC18LF2682-I/SO draws approximately 22 mA at 5V (estimated from PIC18F2682 datasheet typical curves). For battery-backed designs, use the SLEEP instruction combined with ECAN wake-on-message to drop supply current to single-digit microamps between CAN frames. The internal 8 MHz and 31 kHz LFINTOSC oscillators can replace the external crystal during sleep to further reduce power.
Informações de conformidade
RoHS compliant per Microchip product page. The standard PIC18LF2682-I/SO is industrial-grade (-40 C to +85 C) and is NOT AEC-Q100 qualified; for under-hood automotive use, choose the extended-temperature PIC18LF2682-E/SO variant and verify AEC-Q100 requirements with the manufacturer.
