C8051F045 - 25MHz 8-Bit MCU, 64KB Flash, 64-TQFP | Silicon Labs
N.º da peça: C8051F045 ✓ AtivoC8051F045 Visão geral
A microcontroller is a programmable integrated circuit containing a processor core, memory, peripherals, and interface logic on one semiconductor device. The C8051F045 belongs to the C8051F04x family of 8-bit microcontrollers, combining an 8051-compatible core with embedded flash, RAM, digital I/O, communication peripherals, and other mixed-signal resources. Within the product hierarchy, it is a microcontroller, embedded controller, and semiconductor intended for compact standalone control and communication tasks.
The verified product information identifies a 25 MHz maximum operating frequency, 64 KB flash program memory, 4.25 KB RAM, and 2.7 V to 3.6 V supply range. Its 64-pin TQFP package provides substantially more connection options than smaller microcontroller packages and is appropriate for designs requiring external memory interfaces, communications, analog inputs, timers, or a larger number of general-purpose I/O pins. The listed C8051F045-GQ ordering option is identified as a RoHS-compliant, lead-free 64-TQFP variant.
The C8051F045 architecture is positioned for embedded control rather than high-performance computing. Its 25 MHz clock provides deterministic operation for motor, machine, interface, and communications tasks, while the 64 KB flash region supports a larger embedded program than small-memory 8051 devices. The verified listing identifies CAN capability in the C8051F04x family, allowing the controller to participate in industrial and automotive networking designs when the remaining peripheral, transceiver, and timing requirements are satisfied.
Typical applications include CAN-connected industrial controllers, automated test equipment, building-control modules, embedded data-acquisition units, instrumentation, and communication gateways. In a CAN node, the microcontroller executes application logic, handles digital inputs, controls outputs, and communicates through a separate CAN transceiver. The 64-TQFP package also makes the device practical for designs that need more peripheral access than a small 20- or 32-pin MCU can provide.
Designers should verify the complete pin assignment and peripheral availability against the manufacturer datasheet before layout because the supplied search results establish the package size and pin count but do not provide a complete numbered pin table. The 3.3 V supply range also requires careful regulator selection, while CAN implementation depends on correct transceiver selection, bus termination, isolation requirements, and software timing.
This page consolidates the verified distributor specifications, package information, availability observations, and engineering-oriented application guidance into one practical reference. It also separates directly verified facts from unavailable details so engineers can identify what still requires confirmation in the complete C8051F04x technical documentation.
Alternativas drop-in para C8051F045 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
C8051F045-GQ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F040
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →C8051F041
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →C8051F042
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →C8051F043
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →C8051F044
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →C8051F045 Classificações máximas e características elétricas
| Microcontroller Type | 8-bit microcontroller |
| Architecture | 8051-compatible |
| Series | C8051F04x |
| Frequência máxima de clock | 25 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 64 KB (64K x 8) |
| RAM Size | 4.25 KB (4.25K x 8) |
| Supply Voltage Range | 2.7 V to 3.6 V |
| CAN Interface | Yes |
| Encapsulamento | 64-TQFP (10 x 10 mm) |
| Contagem de pinos | 64 pins |
| Tipo de montagem | Surface mount |
| Core Count | 1 core |
| Status RoHS | Compliant for the listed C8051F045-GQ ordering option |
Guia de Configuração de Pinos do C8051F045 64-tqfp (10 x 10 mm)
Configuração de pinos para C8051F045 (pacote 64-tqfp (10 x 10 mm)). 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 C8051F045.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
C8051F045 é adequado para 6 aplicaçãos: CAN-Connected Industrial Control, Automated Test Equipment, Building Control and HVAC Equipment, Embedded Data Acquisition, Instrumentation and Measurement Front Ends, Communication Gateways.
CAN-Connected Industrial Control
The C8051F045 fits CAN-connected industrial controllers because it combines a 25 MHz 8-bit core, 64 KB of flash, 4.25 KB of RAM, and CAN support in a 3.3 V operating range. The controller can execute sequencing logic, supervise digital inputs, drive outputs, and exchange process data while an external transceiver handles the physical bus. Its 64-pin TQFP package provides access to substantially more I/O and peripheral resources than a small controller package. Before layout, engineers should confirm the exact pin assignment and peripheral multiplexing in the manufacturer documentation. Firmware should also include bus-off handling, fault counters, timeout behavior, and safe-state outputs so the external CAN interface remains predictable during network errors.
Recomendado
Automated Test Equipment
The C8051F045 is suitable for embedded automated-test equipment that needs deterministic control, substantial flash space, and many accessible signals. Its 25 MHz clock supports responsive sequencer logic, while 64 KB of flash accommodates test programs and 4.25 KB of RAM can hold temporary measurements and state information. The 64-TQFP package can expose measurement-control I/O, communication interfaces, and peripheral inputs without requiring a companion programmable-logic device. In such a system, the MCU coordinates stimuli, reads results, and reports status through a communications interface. The principal engineering trade-off is that a 25 MHz 8-bit architecture offers less parallel processing than a modern 32-bit MCU, so workload partitioning and deterministic interrupt design remain important.
Recomendado
Building Control and HVAC Equipment
The C8051F045 can serve as the central controller in building-control, HVAC, or environmental-control equipment where many digital and analog functions must be coordinated. Its 64 KB flash provides room for control algorithms, schedules, diagnostics, and communication firmware, while 4.25 KB of RAM supports buffers and operating state. The 2.7 V to 3.6 V supply range fits regulated 3.3 V control boards, and the 64-pin package leaves more I/O available for sensors, relays, and bus interfaces than compact MCUs. A production design should define fail-safe states for power loss, actuator faults, and sensor failure. The complete electrical characteristics and exposed-pin functions must be verified against the manufacturer datasheet before assigning sensitive analog or high-current outputs.
Recomendado
Embedded Data Acquisition
The C8051F045 is appropriate for compact embedded data-acquisition units that must gather sensor information, execute control calculations, and store or transmit results. Its 25 MHz clock provides useful throughput for sampling coordination and protocol handling, while 64 KB of flash and 4.25 KB of RAM allow meaningful local buffering without immediately requiring external memory. The 64-pin TQFP package offers more peripheral choices for sensors and communications than smaller 8-bit devices. In an acquisition design, the MCU should configure analog and digital inputs, timestamp measurements, apply calibration, and flag out-of-range data. Exact ADC resolution, reference behavior, and analog timing were not present in the supplied search snippets, so those functions must be confirmed in the complete datasheet before the MCU is approved for precision measurement.
Recomendado
Instrumentation and Measurement Front Ends
The C8051F045 is a practical fit for instrumentation front ends that combine control logic, communication, and a moderate amount of embedded code. Its 64 KB flash can store calibration tables, menus, diagnostics, and protocol handlers, while 4.25 KB of RAM supports working buffers. At 25 MHz, the 8-bit core is well suited to deterministic supervisory tasks, and the 64-pin package offers a broad connection count for display, keys, measurement circuitry, and communications. For laboratory or process instrumentation, designers should add suitable input protection and isolation where required, and should not infer analog precision from the generic family listing. The verified information confirms the microcontroller's clock, memory, supply, CAN capability, and package, but the complete pin-level and analog electrical details remain prerequisites for final schematic sign-off.
Recomendado
Communication Gateways
The C8051F045 can implement a compact gateway that bridges a CAN segment with another serial, industrial, or Ethernet-oriented interface. Its 25 MHz core is sufficient for protocol translation, while 64 KB of flash accommodates multiple stack configurations and 4.25 KB of RAM provides packet and message buffers. The 64-TQFP package gives a gateway designer access to a wide set of I/O and peripheral functions without immediately adding a larger processor. A practical implementation should use DMA or interrupt-driven reception where available, apply frame-length and timeout checks, and isolate external circuitry where the communication environment is noisy. The exact peripheral inventory, package pin multiplexing, and electrical limits must be checked in the full Silicon Labs documentation before finalizing a gateway schematic or firmware architecture.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para C8051F045 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | C8051F045-GQ | C8051F040 | C8051F041 | C8051F042 |
|---|---|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 64-TQFP (10 x 10 mm) | 64-TQFP (10 x 10 mm) | 64-TQFP (10 x 10 mm) | 64-TQFP (10 x 10 mm) | 64-TQFP (10 x 10 mm) |
| Architecture | 8-bit 8051-compatible | 8-bit 8051-compatible | 8-bit C8051F04x family | 8-bit C8051F04x family | 8-bit C8051F04x family |
Principais diferenciais
- Directly documented replacement ordering option (vs C8051F045-GQ)
- Established 3.3 V-class operating range (vs C8051F040)
- Moderate code and working-memory capacity (vs C8051F041)
- Integrated CAN connectivity (vs C8051F042)
Notas de projeto
Do not route the PCB until the complete C8051F045 pinout and alternate-function mapping have been checked in the manufacturer datasheet. The verified records establish a 64-pin 10 x 10 mm TQFP, but they do not expose individual pin assignments for power, ground, reset, programming, clock, and communications. Confirm exposed versus routed pins, required decoupling, programming signals, and every peripheral's alternate-function location before releasing the layout.
Design the supply for the verified 2.7 V to 3.6 V operating range, including startup and transient margin. Place local bulk and high-frequency decoupling capacitors close to the device's supply and ground pins, and provide a low-impedance return path for every switching current. Exact capacitor values and pin locations must follow the manufacturer's recommended layout because the supplied data does not specify capacitor requirements or absolute maximum ratings.
For a CAN implementation, keep the MCU and transceiver interface short and place protection components near the connector or transceiver rather than at the controller. Use a continuous ground reference, separate noisy switching returns from sensitive signal paths, and follow the transceiver manufacturer's guidance for bus topology and termination. The C8051F045's 25 MHz clock allows plenty of processing headroom, but protocol timing still depends on a deterministic interrupt structure and verified peripheral clock configuration.
Estimated thermal and power checks cannot be completed from the supplied information because the device's operating current and thermal resistance were not provided. Use the manufacturer maximum-current and thermal data with the actual clock, enabled peripherals, and package layout. Validate worst-case ambient temperature and output activity in the assembled board; do not reuse the listed distributor price or memory capacity as evidence of power performance.
Informações de conformidade
RoHS-compliant and lead-free status was explicitly reported for the C8051F045-GQ ordering option in the verified TrustCompo listing. No verified REACH, halogen-free, AEC-Q100, or conflict-minerals statement was supplied for the base MPN.
