PIC16F685-E/SS - 20MHz 8-Bit Flash MCU | Microchip Technology
N.º da peça: PIC16F685-E/SS ✓ AtivoPIC16F685-E/SS Visão geral
An 8-bit flash microcontroller is a compact embedded-control device that executes firmware from nonvolatile Flash memory while using EEPROM for data that must survive power loss. The PIC16F685 extends this product hierarchy from the general-purpose 8-bit MCU to the PIC16 mid-range platform, then to a nanoWart low-power microcontroller family designed for cost-sensitive embedded control and low-power operation.
The principal device characteristics include an 8-bit architecture, 7 KB Flash program memory, 256 bytes of EEPROM, 256 bytes of RAM, 20 MHz operating frequency, 18 I/O pins, and a 2.0 V to 5.5 V supply-voltage range. These resources support control loops, digital interface handling, sensor acquisition, actuator control, and general-purpose embedded logic. On-chip EEPROM distinguishes the device from flash-only microcontrollers that require external nonvolatile storage.
The PIC16F685 family is built around the recognized PIC mid-range core and includes standard features such as on-board EEPROM, programmable I/O, Flash memory, and nanoWart technology. The 18 available I/O pins provide practical connectivity for buttons, indicators, logic signals, communications peripherals, and external control components. Its 20 MHz maximum operating frequency allows the core to process instructions quickly enough for a broad range of compact control tasks.
Typical uses include industrial control modules, building and appliance controls, instrumentation, sensor-interface boards, programmable timers, compact power-control products, and general embedded systems. The device is particularly suitable where an application needs reconfigurable embedded firmware, nonvolatile data storage, and a moderate number of I/O connections without adopting a larger processor or external memory device.
PCB design should preserve the manufacturer's recommended decoupling and programming access. Use the pin-description table in the Microchip PIC16F685 documentation when assigning the 20 package pins, and verify oscillator, reset, programming, and I/O assignments against the selected device variant. The SSOP land pattern also requires assembly planning for its 0.209-inch package width and relatively long leads.
This product record combines the manufacturer family specifications, lifecycle information, package details, pin-location guidance, and application-oriented design considerations. It also distinguishes the exact PIC16F685-E/SS ordering code from related temperature-grade and package variants so engineers can make a controlled replacement decision rather than assuming that every similarly named PIC16 device is drop-in compatible.
Alternativas drop-in para PIC16F685-E/SS — 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 PIC16F685-E/SS (mesmo formato e footprint) — diferindo em Package, Communication, Data EEPROM, Internal Oscillator, RAM.
PIC16F685-I/SS
✅ Drop-InConsulte o preço
Ver ficha técnica →PIC16F685-E/SS Classificações máximas e características elétricas
| Microcontroller Type | 8-bit Flash-based CMOS microcontroller |
| Frequência máxima de clock | 20 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 7 KB |
| Program Word Size | 14 bits |
| EEPROM Data Memory | 256 bytes |
| RAM | 256 bytes |
| I/O Pin Count | 18 pins |
| Total Package Pin Count | 20 pins |
| Tensão de alimentação de operação | 2.0 V to 5.5 V |
| Encapsulamento | 20-pin SSOP, 0.209-inch (5.30 mm) width |
| Tipo de montagem | Surface mount |
| Instruction Set | PIC mid-range 14-bit instruction architecture |
| Low-Power Technology | nanoWart technology |
| Temperature Grade | E temperature grade |
| Status do ciclo de vida | Active |
Guia de Configuração de Pinos do PIC16F685-E/SS 20-pin ssop, 0.209-inch (5.30 mm) width
Configuração de pinos para PIC16F685-E/SS (pacote 20-pin ssop, 0.209-inch (5.30 mm) width). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para PIC16F685-E/SS.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PIC16F685-E/SS é adequado para 6 aplicaçãos: Industrial Control and Automation, Sensor Acquisition and Signal Conditioning, Appliance and Building Control, Programmable Timers and Sequencers, Instrumentation and Measurement, Battery-Powered Embedded Devices.
Industrial Control and Automation
The PIC16F685-E/SS fits compact industrial control modules that monitor discrete inputs and drive relays, indicators, or other actuators. Its 18 I/O pins provide useful signal density for a small controller, while the 7 KB Flash accommodates embedded control firmware and the 256-byte EEPROM preserves settings without external memory. The 2.0 V to 5.5 V operating range supports common low-voltage systems, and the extended-temperature E grade is appropriate when the enclosure experiences a wider thermal range. Firmware should include input debouncing, actuator timing, fault handling, and safe output states during reset or programming.
Recomendado
Sensor Acquisition and Signal Conditioning
The PIC16F685-E/SS can serve as the acquisition controller for low- to moderate-speed sensor systems, using its 18 I/O pins for digital sensors, switches, and interface signals. The 20 MHz clock provides ample instruction throughput for sampling, filtering, scaling, and threshold decisions, while 256 bytes of EEPROM can retain calibration constants or operating profiles. Engineers should budget RAM carefully, avoid blocking delays during time-sensitive sampling, and confirm that the selected sensor's signal range is compatible with the MCU's input characteristics.
Recomendado
Appliance and Building Control
The PIC16F685-E/SS is suitable for appliance controllers, room-control modules, and building equipment that combine user inputs with relay or motor-control outputs. Its integrated Flash supports field-updatable control logic, while on-board EEPROM retains schedules, calibration values, or configuration identifiers across power cycles. Eighteen I/O pins help reduce the need for external logic when the design includes LEDs, buttons, displays, and discrete sensors. Firmware should include safe-state initialization and debounce logic to prevent unintended actuator activation during startup.
Recomendado
Programmable Timers and Sequencers
The PIC16F685-E/SS can implement compact timers, event sequencers, and configurable process controllers because its 20 MHz clock supports precise software timing and its Flash permits reusable firmware. The 256-byte EEPROM can hold timing tables or counters that must persist, while the 18 I/O pins can drive multiple stage indicators or discrete outputs. For production designs, use a hardware timer for critical intervals where possible, account for instruction-cycle timing, and define safe output behavior during brownout, reset, and firmware updates.
Recomendado
Instrumentation and Measurement
The PIC16F685-E/SS can coordinate measurements in compact instrumentation that combines a sensor front end with local switches, indicators, and a data interface. Its 7 KB program Flash supports drivers, calibration routines, and communication handling, while 256 bytes of EEPROM can preserve instrument settings. The 18 I/O pins are valuable for range selection, enable signals, status indicators, and control lines. Designers should isolate sensitive analog paths from switching nodes and validate timing margins for conversion sequences, interrupts, and serial communication.
Recomendado
Battery-Powered Embedded Devices
The PIC16F685-E/SS is suitable for compact, low-duty-cycle embedded devices where an 8-bit controller, EEPROM, and moderate I/O capacity are sufficient. Its 2.0 V to 5.5 V operating range permits integration with low-energy systems, and nanoWart technology supports low-power design objectives. Efficient firmware should keep the MCU asleep during long intervals, use a timer or external event to wake it, and minimize active-time current. Actual battery life depends on the chosen supply source, sensor load, sleep configuration, and leakage of the complete board.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16F685-E/SS — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16F685-I/SS |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP |
| Architecture | 8-bit PIC mid-range | 8-bit PIC mid-range |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Program Memory | 7 KB Flash | 7 KB Flash |
| EEPROM Data Memory | 256 bytes | 256 bytes |
| RAM | 256 bytes | 256 bytes |
| I/O Pin Count | 18 pins | 18 pins |
| Operating Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Temperature Grade | E temperature grade | I temperature grade |
Principais diferenciais
- Extended-temperature ordering option within the same PIC16F685 family (vs PIC16F685-I/SS)
- Integrated nonvolatile parameter storage (vs PIC16C54-10E/SS)
- Flash-based configuration and firmware flexibility (vs PIC16C54-10E/SS)
Notas de projeto
Connect the supply and ground pins according to the pin-description table in the Microchip PIC16F685 documentation and place the required bypass capacitor close to the device supply pins. Because this MCU operates from 2.0 V to 5.5 V, verify that the regulator output, input pins, and any attached sensors share a compatible voltage domain. Avoid routing high-current output traces through the regulator return path, and confirm brownout behavior in firmware so outputs enter a defined safe state.
Use the manufacturer SSOP-20 land pattern and follow the recommended solder-mask and copper geometry. The package is only 0.209 inches wide, so inspect the assembled board for solder bridging between closely spaced leads. Place programming access and any externally accessible reset or oscillator components where they do not interfere with assembly. Confirm the orientation against the package pin-1 marker before releasing a PCB revision.
Do not treat the E and I suffix variants as interchangeable without checking the ambient-temperature requirement. PIC16F685-E/SS and PIC16F685-I/SS share the same 20-pin SSOP footprint and core resources, but they represent different temperature grades. Also verify that firmware, configuration words, EEPROM data, and application-specific calibration are handled according to the programming documentation before replacing one ordering code with the other.
For battery-powered products, use the MCU's low-power operating modes and avoid continuous polling. Keep the controller asleep during long idle periods, wake it through a timer or qualified external interrupt, and batch peripheral transactions to reduce active time. Actual operating current is strongly influenced by the selected clock, peripheral activity, board leakage, and sensor loads, so measure the complete product rather than estimating runtime from processor specifications alone.
Informações de conformidade
The exact PIC16F685-E/SS ordering code is identified as lead-free in component-listing information, but no explicit RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals declaration is included in the cited sources.
