PIC18LF2682-I/SP - 8-bit MCU, 80KB Flash, ECAN, 28-SPDIP | Microchip
MPN: PIC18LF2682-I/SP ✓ Hoạt độngPIC18LF2682-I/SP Tóm tắt
What is an 8-bit PIC18 microcontroller? It is a member of Microchip's PIC18 family of Harvard-architecture microcontrollers, positioned in the hierarchy as PIC18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC18F/LF parts combine a RISC instruction set, nanoWatt Technology power management, and rich peripheral integration (CAN, ADC, PWM, USART, SPI, I2C) into a single chip, replacing discrete logic in embedded applications. The 'F' suffix denotes flash program memory and the 'L' in 'LF' denotes the low-voltage / wide-Vdd variant. The '2682' family specifically targets ECAN-enabled industrial and automotive networking.
Key features include 25 I/O pins, two enhanced USART modules, one MSSP (SPI/I2C), one ECAN module, one 10-bit ADC with up to 11 input channels, two CCP/ECCP modules, and nanoWatt power management with multiple idle and sleep modes. The 28-pin SPDIP package offers through-hole mounting for prototyping, breadboarding, and industrial designs where through-hole robustness is preferred over surface-mount. The industrial temperature range of -40C to +85C supports harsh-environment deployment.
Architecturally, the PIC18LF2682 uses a 16-bit instruction word with 8-bit data path, providing orthogonal addressing and a hardware multiplier for 8x8 single-cycle operations. The ECAN module implements CAN 2.0B active with 32 acceptance filters and eight acceptance mask registers, supporting bit rates up to 1 Mbps for high-speed CAN networks. nanoWatt Technology reduces quiescent current to below 100 nA in sleep mode, enabling battery-backed industrial sensors.
Typical applications include CAN node interfaces in industrial automation, automotive body and chassis ECUs, building automation gateways, HVAC controllers, sensor hubs with local processing, and CAN-based distributed I/O modules. The 28-pin SPDIP package is also favored for educational boards and engineering prototypes.
When designing with this part, note that the LF variant supports 2.0V to 5.5V supply while ECAN requires a minimum of 4.2V. Plan decoupling with 100 nF ceramic close to VDD and a 10 uF bulk capacitor at the supply rail. Use ICD/ICSP headers for in-circuit debugging with Microchip's MPLAB X IDE and PICkit 3/4 or ICD 4 programmers.
This page synthesizes distributor pricing, drop-in PIC18LF2682 alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF2682-I/SP — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF2682-I/SP (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Program Memory (Flash), I/O Pins, ADC.
PIC18F2682-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF2685-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F2685-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF2580-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF2680-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF2682-I/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18, 8-bit RISC, Harvard |
| Program Memory (Flash) | 80 KB |
| Data Memory (SRAM) | 3 KB |
| Data EEPROM | 1 KB |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V (ECAN 4.2 V to 5.5 V) |
| I/O Pins | 25 |
| A/D Converter | 10-bit, up to 11 channels |
| ECAN Module | CAN 2.0B active, 32 filters, 8 masks |
| USART | 2x Enhanced USART |
| MSSP (SPI/I2C) | 1x |
| CCP / ECCP Modules | 2x (1 ECCP) |
| Timers | 1x 8-bit, 3x 16-bit |
| Hộp | SPDIP-28 (28-pin Skinny Plastic DIP, through-hole) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| nanoWatt Technology | Yes (multiple idle/sleep modes, <100 nA sleep) |
| ICSP / ICD | Yes (2-wire In-Circuit Serial Programming) |
| Kiểu lắp đặt | Through-Hole |
Cấu hình chân PIC18LF2682-I/SP
| Chân 1 | MCLR/RE3 — Master Clear (reset) input or digital input RE3 |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input AN0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input AN1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / AN2 / negative voltage reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / AN3 / positive voltage reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / AN4 / SPI slave select |
| Chân 8 | OSC1/RA7 — Crystal oscillator input / PORTA bit 7 |
| Chân 9 | OSC2/RA6 — Crystal oscillator output / PORTA bit 6 |
| Chân 10 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Chân 11 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 18 | RB0/AN12 — PORTB bit 0 / analog input AN12 |
| Chân 19 | RB1/AN10 — PORTB bit 1 / analog input AN10 |
| Chân 20 | RB2/AN8 — PORTB bit 2 / analog input AN8 |
| Chân 21 | RB3/AN9 — PORTB bit 3 / analog input AN9 |
| Chân 22 | RB4 — PORTB bit 4 |
| Chân 23 | RB5 — PORTB bit 5 |
| Chân 24 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 25 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 26 | VSS — Ground reference |
| Chân 27 | VDD — Positive supply voltage |
| Chân 28 | C1TX/RC8 — ECAN TX (Note: pin function varies by specific 28-pin variant; verify against datasheet) |
Ứng dụng tiêu biểu
PIC18LF2682-I/SP phù hợp cho 6 Áp dụngs: Industrial CAN Node Interface, Automotive Body and Chassis ECU, Building Automation Gateway, Sensor Hub with Local Processing, HVAC Variable Air Volume Controller, Educational and Prototyping Platform.
Industrial CAN Node Interface
The PIC18LF2682-I/SP is purpose-built for slave nodes on CANopen or DeviceNet networks in industrial automation. Its ECAN module supports CAN 2.0B active with 32 acceptance filters, enabling selective message handling without CPU overhead, while the 80 KB flash accommodates CANopen CiA 401/402 stacks plus application logic. The 10-bit ADC samples analog sensor inputs at up to 30 ksps, and the 5 V supply matches standard industrial backplanes. Designers place an MCP2551 or TJA1050 CAN transceiver on the bus side and use the ECAN TX/RX pins (C1TX, C1RX) on the PIC18LF2682 directly. nanoWatt Technology with sub-100 nA sleep extends battery-backed sensor node lifetime.
Được đề xuất
Automotive Body and Chassis ECU
Body control modules, HVAC controllers, mirror controllers, and lighting ECUs in automotive networks commonly use the PIC18LF2682-I/SP. Its industrial -40 C to +85 C temperature range plus ECAN 2.0B support make it suitable for non-safety-critical chassis domains. The 28-pin SPDIP footprint fits legacy through-hole automotive PCB designs, while 25 I/O pins drive relays, MOSFET gates, and LED arrays. The 10-bit ADC reads thermistor and potentiometer inputs, and ECCP generates PWM for motor speed control. nanoWatt sleep modes quiesce the ECU to <100 nA when the vehicle is parked, preserving battery charge over weeks of idle.
Được đề xuất
Building Automation Gateway
BACnet, LonWorks, and proprietary HVAC networks often use CAN as the fieldbus for distributed damper and VAV box controllers. The PIC18LF2682-I/SP runs the CAN stack plus BACnet MS/TP or vendor-specific protocols at 40 MHz, with 3 KB SRAM holding both stacks and per-device configuration. The USART modules support RS-485 or RS-232 trunks for commissioning laptops. Its 2.0 V to 5.5 V supply flexibility simplifies designs that must accept either 3.3 V or 5 V power over Ethernet or 24 V AC wall adapters with onboard regulation.
Được đề xuất
Sensor Hub with Local Processing
Sensor hubs that aggregate analog inputs from thermocouples, RTDs, strain gauges, or bridge sensors benefit from the PIC18LF2682-I/SP's 10-bit ADC with up to 11 channels, ECAN for networked data forwarding, and 80 KB flash for linearization and digital-filter algorithms. The MCU samples inputs, applies calibration constants stored in 1 KB EEPROM, applies moving-average or Kalman filtering in software, and broadcasts processed values on CAN. nanoWatt Technology permits battery-backed operation for remote wireless-bridge sensor nodes transmitting on periodic CAN wake-up events.
Được đề xuất
HVAC Variable Air Volume Controller
VAV box controllers regulate airflow via damper actuators in commercial HVAC systems and frequently communicate over CAN or BACnet. The PIC18LF2682-I/SP's ECCP module generates PWM to drive the damper motor while the ADC reads differential pressure across the airflow sensor. ECAN enables coordination with the building automation controller, and the 28-pin SPDIP footprint simplifies field replacement in installed equipment. The MCU's industrial -40 C to +85 C rating handles plenum-temperature environments without derating.
Được đề xuất
Educational and Prototyping Platform
The 28-pin SPDIP form factor of the PIC18LF2682-I/SP is breadboard-friendly and widely supported on Microchip's low-pin-count development boards and Curiosity/Explorer platforms. University courses teaching embedded CAN, ADC, and PWM use this part because students can swap it in/out of a breadboard without soldering. The 80 KB flash and ECAN peripherals expose real-world industrial capabilities at an accessible price point for student projects, capstone designs, and maker prototypes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF2682-I/SP — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F2682-I/SP | PIC18LF2685-I/SP | PIC18LF2580-I/SP | PIC18LF2680-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SPDIP-28 | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) |
| Flash Memory | 80 KB | 80 KB | 96 KB | 32 KB | 64 KB |
| SRAM | 3 KB | 3 KB | 3 KB | 1.5 KB | 1 KB |
| ECAN Module | Yes (CAN 2.0B active) | Yes | Yes | Yes | No |
| Operating Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
Bảo phân biệt quan trọng
- Wider operating voltage range than F variant (vsPIC18F2682-I/SP)
- Higher flash density than 2580 and 2680 families (vsPIC18LF2580-I/SP and PIC18LF2680-I/SP)
- More SRAM than PIC18LF2580-I/SP (vsPIC18LF2580-I/SP)
Ghi chú thiết kế
Place a 100 nF decoupling ceramic capacitor as close as possible to each VDD pin (pin 27 and any AVDD supply, if used) with traces kept short and wide to minimize inductance. Add a single 10 uF bulk capacitor at the board's supply input. For 3.3 V designs derived from 5 V, use a low-dropout regulator such as MCP1700 rated for the total board current. The PIC18LF2682's nanoWatt Technology supports <100 nA sleep current with the watchdog disabled; enable Sleep mode in firmware during inactive intervals to maximize battery life.
If the board uses an external crystal, place the crystal and its load capacitors within 5 mm of the OSC1/OSC2 pins (pins 8 and 9). Keep crystal traces short and guarded by a ground pour to reduce EMI. For high-speed CAN at 1 Mbps, route C1TX and C1RX as a matched differential pair to the MCP2551 or TJA1050 transceiver, with 120 ohm termination resistors at each end of the bus. Avoid routing CAN traces parallel to switching power traces for more than 25 mm to prevent common-mode noise injection.
Do not assume the F and LF variants are interchangeable: PIC18F2682 requires 4.2 V to 5.5 V while PIC18LF2682 supports 2.0 V to 5.5 V. Designs running at 3.3 V must use the LF variant. ECAN requires VDD >= 4.2 V; if ECAN is unused but the supply is below 4.2 V, disable the ECAN module in firmware (ECANCON = 0). When using ICSP for in-circuit programming, ensure the PGD/PGC lines (RB6/RB7) are not pulled low by external circuitry during programming, otherwise ICSP will fail.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip environmental documentation. Industrial -40C to +85C temperature grade. Not AEC-Q100 qualified - for AEC-Q100 automotive applications use PIC18F2682 variants qualified to Grade 1 or consult Microchip automotive portfolio.
