PIC18F4682-E/ML - 8-Bit 40MHz 80KB Flash MCU 44-QFN | Microchip
MPN: PIC18F4682-E/ML ✓ Hoạt độngPIC18F4682-E/ML Tóm tắt
An 8-bit microcontroller (MCU) is a small, self-contained computer on a single integrated circuit that combines a CPU, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), and configurable peripheral blocks on one die. Within the semiconductor taxonomy it sits under: 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC18F family specifically uses a 16-bit wide instruction set with Harvard architecture, giving most instructions single-cycle execution while addressing up to 2 MB of linear program memory, and it is widely used in cost-sensitive control, sensing and motor-drive applications.
Key features of the PIC18F4682-E/ML include an integrated ECAN (Enhanced Controller Area Network) module for automotive and industrial networking, a 12-bit A/D converter with up to 11 input channels, a 10-bit DAC, multiple Enhanced Capture/Compare/PWM (ECCP) modules, and nanoWatt power management for low quiescent current in sleep modes. The 44-QFN exposed-pad package provides 36 general-purpose digital I/O pins and strong thermal dissipation for sustained 40 MHz operation.
The device operates from 4.2 V to 5.5 V, supports the extended -40 C to +125 C temperature range suitable for automotive and industrial environments, and is qualified to Microchip's automotive flow. Its peripherals - ECAN, USART, MSSP (SPI/I2C), timers and comparators - make it a true mixed-signal platform rather than a simple control MCU.
Typical applications include CAN node endpoints in automotive body and chassis ECUs, HVAC and appliance control boards, industrial sensor hubs with analog front-ends, motor control subsystems using ECCP+PWMs, and battery-managed portable devices that benefit from nanoWatt low-power modes.
When designing with this part, place decoupling capacitors as close as possible to every VDD/VSS pair, connect the exposed pad to a low-impedance ground plane for thermal and EMI performance, and configure the Configuration Words correctly to enable the ECAN pins on the correct I/O ports and to set the brown-out reset voltage.
This page combines distributor pricing, drop-in alternatives from the same PIC18F family and cross-manufacturer equivalents, and practical design notes drawn from Microchip application literature, all of which are not consolidated on a typical DigiKey or Mouser listing.
Bộ thay thế dễ dàng lắp đặt cho PIC18F4682-E/ML — 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 PIC18F4682-E/ML (cùng hình factor và footprint) — khác nhau ở Package, Program Memory (Flash), CAN Module, Communication Peripherals, Operating Temperature.
PIC18F4682-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4682T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F4680-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4680T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4680-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4585-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4682-E/ML Tỷ lệ tối đa & tính chất điện
| Core | PIC18F, 8-bit, RISC, Harvard architecture |
| Instruction Set Width | 16-bit (8-bit data path) |
| CPU Clock Speed | 40 MHz (max) |
| Program Memory (Flash) | 80 KB (40K x 16) |
| RAM | 3.3 KB |
| EEPROM | 1 KB |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +125 C (Extended, automotive grade) |
| I/O Pins | 36 |
| Hộp | 44-QFN (8x8 mm) with exposed pad (ML) |
| A/D Converter | 12-bit, up to 11 channels |
| D/A Converter | 10-bit |
| CAN Module | ECAN (Enhanced Controller Area Network) |
| Communication Peripherals | ECAN, USART, MSSP (SPI / I2C) |
| Timers / ECCP | Multiple 8/16-bit timers and Enhanced CCP (ECCP) modules |
| Power-Saving Mode | nanoWatt technology (low-power sleep modes) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18F4682-E/ML
| Chân 1 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| Chân 3 | RA2/AN2 — PORTA bit 2 / analog input channel 2 |
| Chân 4 | RA3/AN3 — PORTA bit 3 / analog input channel 3 |
| Chân 5 | RA4 — PORTA bit 4 |
| Chân 6 | RA5/AN4 — PORTA bit 5 / analog input channel 4 |
| Chân 7 | RA6 — PORTA bit 6 |
| Chân 8 | RA7 — PORTA bit 7 |
| Chân 9 | VSS — Ground reference |
| Chân 10 | VDD — Positive supply (4.2 V to 5.5 V) |
| Chân 11 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 12 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 13 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Chân 14 | RB3 — PORTB bit 3 |
| Chân 15 | RB4 — PORTB bit 4 |
| Chân 16 | RB5 — PORTB bit 5 |
| Chân 17 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 18 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply (4.2 V to 5.5 V) |
| Chân 21 | RC0 — PORTC bit 0 |
| Chân 22 | RC1 — PORTC bit 1 |
| Chân 23 | RC2/CCP1 — PORTC bit 2 / Enhanced CCP1 output |
| Chân 24 | RC3 — PORTC bit 3 |
| Chân 25 | RC4 — PORTC bit 4 |
| Chân 26 | RC5 — PORTC bit 5 |
| Chân 27 | RC6/TX — PORTC bit 6 / USART transmit |
| Chân 28 | RC7/RX — PORTC bit 7 / USART receive |
| Chân 29 | RD0 — PORTD bit 0 |
| Chân 30 | RD1 — PORTD bit 1 |
| Chân 31 | RD2 — PORTD bit 2 |
| Chân 32 | RD3 — PORTD bit 3 |
| Chân 33 | RD4 — PORTD bit 4 |
| Chân 34 | RD5 — PORTD bit 5 |
| Chân 35 | RD6 — PORTD bit 6 |
| Chân 36 | RD7 — PORTD bit 7 |
| Chân 37 | RE0/RD — PORTE bit 0 / CAN read |
| Chân 38 | RE1/WR — PORTE bit 1 / CAN write |
| Chân 39 | RE2/CS — PORTE bit 2 / CAN chip select |
| Chân 40 | OSC1/CLKIN — Crystal input or external clock |
| Chân 41 | OSC2/CLKOUT — Crystal output or clock out |
| Chân 42 | VSS — Ground reference |
| Chân 43 | MCLR — Master clear reset (active low) |
| Chân 44 | VDD — Positive supply (4.2 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC18F4682-E/ML phù hợp cho 6 Áp dụngs: Automotive CAN Bus Node, Industrial Sensor Hub with Analog Front-End, HVAC and Appliance Control Boards, Battery-Management Slave Module, Motor Control Subsystem (BLDC/PMSM), Body and Chassis ECU for Vehicles.
Automotive CAN Bus Node
The PIC18F4682-E/ML is well matched to automotive CAN node endpoints because its integrated ECAN module supports CAN 2.0B active with 11-bit and 29-bit identifiers, filtering and masks, while the 80 KB Flash accommodates J1939 or CANopen stack plus application firmware. Placed on a 5 V regulated rail, the MCU drives the CANH/CANL transceiver through dedicated CANTX/CANRX pins; its 12-bit ADC with up to 11 channels reads sensor voltages, and the 10-bit DAC sets actuator bias. Designers benefit from -40 C to +125 C operation matching AEC-Q100 automotive temperature profiles.
Được đề xuất
Industrial Sensor Hub with Analog Front-End
Industrial 4-20 mA or 0-10 V sensor hubs leverage the PIC18F4682-E/ML's 12-bit ADC with up to 11 channels, 10-bit DAC, and 80 KB Flash for calibration tables, linearization math and Modbus RTU command handlers. Operating from 4.2 V to 5.5 V with -40 C to +125 C tolerance, the MCU reliably digitizes thermocouple, RTD and pressure-sensor signals in factory automation. The 44-QFN (8x8 mm) keeps the BOM compact, while USART and MSSP (SPI/I2C) interfaces bridge to digital sensors and isolated RS-485 transceivers for plant-floor networks.
Được đề xuất
HVAC and Appliance Control Boards
HVAC control boards, refrigerators and washing machines use the PIC18F4682-E/ML because its ECCP modules generate the PWM waveforms needed to drive compressor inverters, valve actuators and triac-fired heater banks, while the 12-bit ADC reads temperature and pressure sensors. The 80 KB Flash holds state machines and fault-logging code; nanoWatt power-saving modes let the MCU enter sleep between button presses, extending battery life in thermostat remotes. The 44-QFN exposed pad dissipates heat efficiently when switching 1 A motor loads continuously.
Được đề xuất
Battery-Management Slave Module
Battery management systems use the PIC18F4682-E/ML as a slave cell-monitoring MCU because of its 12-bit ADC for cell voltage measurement, ECAN for daisy-chaining modules across a battery pack, and nanoWatt low-power sleep current during standby. With 80 KB Flash, the firmware handles coulomb counting, cell-balancing control loops and CANopen battery profile reporting. The wide -40 C to +125 C range supports under-hood EV and grid-storage installations where thermal stress is significant.
Được đề xuất
Motor Control Subsystem (BLDC/PMSM)
Brushless DC and permanent-magnet synchronous motor controllers benefit from the PIC18F4682-E/ML's Enhanced CCP modules for center-aligned PWM generation, QEI for rotor position feedback, and 12-bit ADC for phase current sensing. The 80 KB Flash stores sensorless back-EMF observer code or FOC routines, and the 10-bit DAC trims reference currents. Operating up to 40 MHz gives 10 MIPS of deterministic loop budget for 20 kHz current-control loops; the 44-QFN exposed pad pulls heat away from the die during high-current PWM switching.
Được đề xuất
Body and Chassis ECU for Vehicles
Automotive body controllers for lighting, door modules, seat controllers and HVAC head units commonly pair the PIC18F4682-E/ML with LIN or CAN transceivers to talk to vehicle networks. The MCU's 36 GPIO easily drives LED arrays, relay coils and H-bridges, while 80 KB Flash holds the AUTOSAR-friendly application layer and diagnostics stack. AEC-Q100-aligned temperature grade and 4.2-5.5 V operation match 12 V battery rail systems after the LDO pre-regulator, and the nanoWatt modes reduce quiescent drain during vehicle parking.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F4682-E/ML — 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 | PIC18F4682-I/ML | PIC18F4682T-I/ML | PIC18F4680-I/ML | PIC18F4680T-I/ML | PIC18F4680-E/ML | PIC18F4585-E/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8) with exposed pad (ML) | 44-QFN (8x8) with exposed pad (ML) - same | 44-QFN (8x8) with exposed pad (ML) - same | 44-QFN (8x8) with exposed pad (ML) - same | 44-QFN (8x8) with exposed pad (ML) - same | 44-QFN (8x8) with exposed pad (ML) - same | 44-QFN (8x8) with exposed pad (ML) - same |
| Program Memory (Flash) | 80 KB | 80 KB | 80 KB | 64 KB (-20%) | 64 KB (-20%) | 64 KB (-20%) | 48 KB (-40%) |
| RAM | 3.3 KB | 3.3 KB | 3.3 KB | 3.3 KB | 3.3 KB | 3.3 KB | 3.3 KB |
| CAN Module | ECAN | ECAN | ECAN | ECAN | ECAN | ECAN | ECAN |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Extended -40C to +125C |
| CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Single-piece Price (USD, as of 2026-09-28) | $12.12 | lower (industrial grade) | similar (reel vs tube) | lower (less Flash) | lower (reel, less Flash) | lower (less Flash) | lower (less Flash) |
Bảo phân biệt quan trọng
- Extended automotive temperature grade (-40C to +125C) (vsPIC18F4682-I/ML)
- Largest Flash density in PIC18F468x family (vsPIC18F4680-E/ML)
- Higher memory ceiling versus 4585 family (vsPIC18F4585-E/ML)
- Dedicated ECAN hardware engine (vsPIC18F4620-E/PT)
Ghi chú thiết kế
Place one 100 nF decoupling capacitor as close as possible to every VDD/VSS pair on the PIC18F4682-E/ML, plus a 10 uF bulk capacitor near the VDD pin farthest from the regulator. Connect the exposed thermal pad to a low-impedance ground plane using at least 4 thermal vias (0.3 mm drill, 1.0 mm pitch) to maximize heat dissipation at 40 MHz full-load operation. Keep high-speed CAN and crystal traces short and isolated from analog ADC traces to minimize coupling.
Configure the PIC18F4682-E/ML Configuration Words to enable Brown-Out Reset (BOR) at a voltage just below the minimum operating rail (4.2 V), so the MCU resets cleanly when the upstream 5 V regulator droops. Use the on-chip Low-Voltage Detect (LVD) plus nanoWatt sleep mode to keep quiescent current under 1 uA in battery-attached designs. For automotive 12 V supply systems, place a TVS diode (e.g., SMAJ33CA) and a series resistor or PTC between the battery and the 5 V LDO to handle load-dump transients.
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up and a 100 nF capacitor to ground for proper reset behavior. Configure ECAN I/O pins correctly in the Configuration Words; on the PIC18F4682-E/ML, the CANRX/CANTX are multiplexed onto the PORTB/RB2/RB3 pins by default, and Configuration Words must map them to the dedicated CAN pins before CAN traffic works. Verify the oscillator mode selected matches the crystal or external clock; incorrect Configuration Word settings will cause the device to run at the wrong frequency without obvious symptoms.
Route the ECAN differential pair (CANTX/CANRX to MCP2551) as a 100-ohm differential microstrip with matched lengths and at most 4 mm skew to meet CAN signal-integrity masks. Place the MCP2551 within 50 mm of the MCU. Keep the analog AVdd/AVss pins driven by separate filtered rails where feasible, or place a ferrite bead and 10 uF/100 nF decoupling network close to AVdd. Avoid running PWM traces beneath the QFN exposed pad to prevent ground-bounce coupling into sensitive analog channels.
Thông tin tuân thủ
PIC18F4682-E/ML is RoHS compliant, lead-free, AEC-Q100 qualified for automotive applications, and Microchip is CFSI compliant for conflict minerals. Halogen-free status was not specified in the verified data and is marked unknown.
