PIC18F2685-E/SP - 8-bit 40MHz 96KB Flash MCU | Microchip
N.º da peça: PIC18F2685-E/SP ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $16.25 | $16,25 |
| 10 | $14.9 | $149,00 |
| 100 | $13.45 | $1.345,00 |
| 500 | $12.1 | $6.050,00 |
| 1.000 | $10.85 | $10.850,00 |
PIC18F2685-E/SP Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces into one package. The PIC18F family belongs to the 8-bit MCU category within the broader semiconductor hierarchy, alongside 16-bit dsPIC DSC and 32-bit Arm Cortex-M devices. The PIC18F2685 specifically integrates an ECAN (Enhanced Controller Area Network) module, making it part of Microchip's CAN-enabled MCU family.
Key features include 25 digital I/O pins, a 10-bit Analog-to-Digital Converter (ADC) with up to 11 input channels, two Enhanced USART modules, two MSSP (SPI/I2C) peripherals, two 8-bit and three 16-bit timers, and nanoWatt Technology power management for low-power operation. The integrated ECAN controller supports CAN 2.0B active with bus speeds up to 1 Mbps, while the 10-bit ADC achieves conversion rates suitable for sensor monitoring.
The PIC18F2685 architecture uses a 16-bit instruction word with separate 16-bit data and program paths, Harvard bus structure, and a hardware multiplier for 8x8 single-cycle operations. Self-programmability under software control, a wide operating voltage range, and the nanoWatt power-managed modes (Idle, Sleep, RC_RUN) make it well suited for both line-powered and battery-operated applications.
Typical applications include industrial CAN-bus node controllers, automotive body and chassis ECUs, building automation nodes, sensor interfacing hubs, and embedded control requiring deterministic real-time response. The 28-pin SPDIP footprint supports both through-hole prototyping and socketed replacement on legacy boards.
When designing with this device, note that the 'E' suffix denotes the -40C to +125C extended operating temperature range, while the 'SP' package is 28-pin Skinny Plastic DIP (SPDIP). Program/debug via ICSP (In-Circuit Serial Programming) using MPLAB X IDE and a PICkit or ICD debugger; the ECAN module requires proper bus termination and shielding for reliable in-vehicle operation.
This page synthesizes distributor stock levels, drop-in same-package alternatives from the PIC18F family, and practical design considerations not collected in the manufacturer datasheet, supporting faster component selection.
Alternativas drop-in para PIC18F2685-E/SP — 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 PIC18F2685-E/SP (mesmo formato e footprint) — diferindo em Package, RoHS Status, Core Architecture, Program Memory (Flash), Timers.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F2685-I/SP
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F2682-E/SP
✅ Drop-In✓ Em estoque
$7.62 / unidade
Ver ficha técnica →PIC18F2585-E/SP
✅ Drop-In✓ Em estoque
$5.02 / unidade
Ver ficha técnica →PIC18F2682-I/SP
✅ Drop-In✓ Em estoque
$4.31 / unidade
Ver ficha técnica →PIC18F2680-E/SP
✅ Drop-In✓ Em estoque
$7.75 / unidade
Ver ficha técnica →PIC18F2620-I/SP
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$4.85 / unidade
Ver ficha técnica →PIC18F2685-E/SP Classificações máximas e características elétricas
| Core Architecture | PIC18F (8-bit enhanced RISC) |
| Instruction Set Width | 16-bit |
| Maximum CPU Frequency | 40 MHz |
| Performance | 10 MIPS (200 ns instruction cycle) |
| Program Memory (Flash) | 96 KB (48K x 16) |
| SRAM | 3.25 KB (3328 bytes) |
| EEPROM | 1 KB |
| I/O Pins | 25 |
| ADC | 10-bit, up to 11 channels |
| CAN Module | ECAN 2.0B active |
| UART | 2x Enhanced USART |
| SPI / I2C | 2x MSSP (SPI / I2C) |
| Timers | 2x 8-bit + 3x 16-bit |
| Temperatura de operação | -40C to +125C (Extended, 'E' suffix) |
| Encapsulamento | 28-pin SPDIP (Skinny Plastic DIP) |
| Tipo de montagem | Through-Hole |
| Power-Saving Modes | nanoWatt (Idle, Sleep, RC_RUN, etc.) |
| Status RoHS | Compliant |
Configuração de pinos do PIC18F2685-E/SP
| Pino 1 | /MCLR — Master Clear (reset) input, active low |
| Pino 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pino 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input channel 2 / ADC VREF- |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC VREF+ |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4 — PORTA bit 5 / Analog input channel 4 |
| Pino 8 | GND — Ground reference |
| Pino 9 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pino 10 | OSC2/CLKO — Oscillator crystal output / clock output |
| Pino 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Pino 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pino 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pino 14 | RC3 — PORTC bit 3 |
| Pino 15 | RC4 — PORTC bit 4 |
| Pino 16 | RC5 — PORTC bit 5 |
| Pino 17 | RC6/TX — PORTC bit 6 / USART asynchronous transmit |
| Pino 18 | RC7/RX — PORTC bit 7 / USART asynchronous receive |
| Pino 19 | GND — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pino 22 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pino 23 | RB2 — PORTB bit 2 |
| Pino 24 | RB3 — PORTB bit 3 |
| Pino 25 | RB4 — PORTB bit 4 |
| Pino 26 | RB5 — PORTB bit 5 |
| Pino 27 | RB6/PGC — PORTB bit 6 / ICSP clock (programming/debug) |
| Pino 28 | RB7/PGD — PORTB bit 7 / ICSP data (programming/debug) |
Aplicações típicas
PIC18F2685-E/SP é adequado para 6 aplicaçãos: Industrial CAN-Bus Node Controller, Automotive Body and Chassis ECU, Building Automation Sensor Hub, Industrial Sensor Interface Module, Embedded Real-Time Control Board, Medical Device Interface and Monitoring.
Industrial CAN-Bus Node Controller
The PIC18F2685-E/SP is well suited to industrial CAN-bus node controllers because its integrated ECAN 2.0B active module supports bus speeds up to 1 Mbps with hardware acceptance filters and 32 mailboxes, offloading protocol handling from the CPU. Its 96 KB Flash stores full CANopen or DeviceNet stack plus application logic, while the 10-bit ADC with up to 11 channels reads analog process variables. The extended -40C to +125C temperature range handles outdoor cabinet and factory-floor environments. Placed on a 28-SPDIP through-hole PCB with a CAN transceiver such as the MCP2551, it provides a robust, deterministic node at typical CAN bus lengths up to 40 m at 1 Mbps.
Recomendado
Automotive Body and Chassis ECU
In automotive body and chassis ECUs (door modules, seat controllers, climate panels, lighting), the PIC18F2685-E/SP combines ECAN bus connectivity with 96 KB Flash for application software and the extended temperature grade for under-dash or engine-bay-adjacent mounting. The 10-bit ADC scans switch and sensor inputs while the two Enhanced USARTs interface to LIN sub-nodes or diagnostic tools. The nanoWatt Sleep mode draws under 1 uA for ignition-off quiescent current, satisfying automotive parasitic drain requirements. The 28-SPDIP package supports serviceable through-hole assembly common in low-volume automotive aftermarket and racing ECUs.
Recomendado
Building Automation Sensor Hub
For building automation hubs that aggregate HVAC, lighting, and occupancy sensors onto a CAN or CANopen backbone, the PIC18F2685-E/SP provides adequate Flash for BACnet/CANopen gateway stacks alongside application firmware. Its 25 I/O pins drive LED indicators, keypads, and relay outputs, while the two MSSP peripherals handle SPI sensors and I2C real-time clocks or EEPROMs. The 10-bit ADC reads thermistor, light-level, and potentiometer inputs with 10 ksps throughput, fast enough for HVAC damper feedback. The 28-SPDIP package supports retro-fit into legacy building-automation control panels that use through-hole assembly.
Recomendado
Industrial Sensor Interface Module
The PIC18F2685-E/SP fits industrial 4-20 mA loop and bridge-sensor interface modules where deterministic CAN bus reporting, multi-channel analog scanning, and reliable extended-temperature operation are required. The 10-bit ADC multiplexes 11 analog channels to read bridge, RTD, and 4-20 mA shunts, while the 96 KB Flash holds linearization tables, calibration coefficients, and CANopen profile objects. The two Enhanced USARTs interface to RS-485 Modbus RTU masters via external transceivers for legacy system integration. NanoWatt power management allows battery-backed sensor nodes to maintain 10+ year operational life on a single lithium cell.
Recomendado
Embedded Real-Time Control Board
For real-time control boards in industrial automation - small PLCs, motor starters, conveyor controllers - the PIC18F2685-E/SP delivers 10 MIPS deterministic execution via its single-cycle 200 ns instruction path, with 96 KB Flash for ladder-logic or structured-text interpreters. The three 16-bit timers drive PWM outputs for motor speed control, while the 10-bit ADC samples current and position feedback at up to 100 ksps aggregate. The extended temperature grade ensures operation in unconditioned panel enclosures. Through-hole 28-SPDIP packaging simplifies socket-based field replacement in legacy control systems.
Recomendado
Medical Device Interface and Monitoring
In medical monitoring peripherals such as bedside alarm panels, infusion pump interfaces, and physiotherapy controllers, the PIC18F2685-E/SP provides extended-temperature reliability plus CAN connectivity to a central nurse-station backbone. The 10-bit ADC reads sensor analog inputs while the ECAN module delivers deterministic alarms under 1 ms latency at 1 Mbps. The 96 KB Flash supports safety-critical firmware with watch-dog timer (WDT), BOR (Brown-Out Reset), and code-protection features defined in the PIC18F family. The 28-SPDIP package suits low-volume medical device prototyping where through-hole rework and inspection simplify IEC 60601-1 compliance verification.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F2685-E/SP — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F2685-I/SP | PIC18F2682-E/SP | PIC18F2585-E/SP | PIC18F2682-I/SP | PIC18F2680-E/SP | PIC18F2620-I/SP |
|---|---|---|---|---|---|---|---|
| Package | 28-pin SPDIP | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SPDIP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 96 KB | 96 KB (same) | 80 KB (-17%) | 80 KB (-17%) | 80 KB (-17%) | 64 KB (-33%) | 64 KB (-33%) |
| SRAM | 3.25 KB | 3.25 KB (same) | 3.25 KB (same) | 3.25 KB (same) | 3.25 KB (same) | 3.25 KB (same) | 3.25 KB (same) |
| Maximum CPU Frequency | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) |
| ECAN Module | Yes (2.0B active) | Yes | Yes | Yes | Yes | Yes | No (no ECAN on 2620) |
| ADC | 10-bit, up to 11 ch | 10-bit, 11 ch | 10-bit, 11 ch | 10-bit, 11 ch | 10-bit, 11 ch | 10-bit, 11 ch | 10-bit, 11 ch |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
Principais diferenciais
- Highest program memory in the PIC18F268x SPDIP-28 family (vs PIC18F2682-E/SP)
- Extended temperature grade for harsh environments (vs PIC18F2685-I/SP)
- ECAN integrated for deterministic bus networking (vs PIC18F2620-I/SP)
Notas de projeto
The PIC18F2685-E/SP requires a decoupling capacitor of 100 nF (0.1 uF) placed within 5 mm of the VDD pin (pin 20) and a bulk capacitor of 1-10 uF tantalum or ceramic at the supply input. The MCU is rated for operation over the Microchip PIC18F2xxx standard voltage range; consult the datasheet Electrical Characteristics section for the exact Vdd min/max before designing the LDO or switching regulator. The nanoWatt Sleep mode draws microampere-level current, but pin leakage and external circuitry often dominate total quiescent draw.
The /MCLR pin (pin 1) requires a 10 kohm pull-up to VDD for normal operation; floating /MCLR causes random resets. For ICSP programming, /MCLR must be reachable through the ICSP header and not blocked by capacitors directly on the pin. Configuration bits (CONFIG1H through CONFIG5L/5H) must be set correctly before code execution, including the oscillator selection (HS for high-speed crystal) and the watchdog timer (WDT) enable state - incorrect settings lock the device into unprogrammed state.
Place the 28-SPDIP device on a 0.300 inch (7.62 mm) row spacing through-hole footprint with at least 0.5 mm annular ring around each pin hole for reliable wave or hand soldering. Keep the 40 MHz crystal traces (pins 9-10) short and symmetric, surrounded by a ground pour to reduce EMI. Route the ECAN CANTX/CANRX traces (typically on RB3/RB2 or RC6/RC7 depending on PPS configuration) as a differential pair with 120 ohm characteristic impedance, terminated at both ends with 120 ohm resistors per CAN bus standard.
Estimated: At maximum operating temperature of +125C ambient and typical 40 MHz active current consumption per the PIC18F2685 datasheet, the 28-SPDIP package dissipates roughly 0.5-1.0 W in continuous full-activity operation. While this is well within the package's thermal rating, ensure the PCB layout does not restrict airflow around the part and that adjacent components (voltage regulators, drivers) do not heat the MCU beyond its extended-temp rating. The 28-SPDIP's larger lead frame provides better thermal dissipation than SOIC equivalents.
Informações de conformidade
RoHS and REACH compliance per Microchip product page and material declaration. The part is supplied in lead-free matte-tin finish. AEC-Q100 qualification status not explicitly listed for this part number; the automotive-grade PIC18F2685 equivalent would require a different ordering code. Halogen-free status not explicitly stated in the verified web data and is recorded as 'unknown' pending datasheet verification.
