C8051F301 - 25MHz 8-Bit Mixed-Signal MCU | Silicon Labs
部品番号: C8051F301 ✗ 生産終了C8051F301 概要
An 8051 microcontroller is a CISC-based embedded controller architecture that provides a compact, deterministic platform for reading sensors, controlling outputs, and executing firmware. The C8051F301 belongs to the broader semiconductor hierarchy of microcontroller, mixed-signal MCU, embedded processing IC, and system-on-chip. Its integrated analog peripherals reduce the need for external converters and support space-constrained industrial, instrumentation, and control designs.
The principal features include an 8-bit processor core operating at 25 MHz, 8 KB of Flash memory, 256 × 8 bytes of RAM, and eight external I/O pins. The analog subsystem includes an eight-bit ADC capable of 500 ksps conversion, support for eight external inputs, programmable amplifier gains referenced to VREF or VDD, and an integrated temperature sensor. Three 16-bit timers provide timing resources for periodic control, measurement timing, and motor or actuator sequencing.
Technically, the C8051F301 combines legacy-compatible 8051 software execution with mixed-signal acquisition in a very small package. Its 500 ksps ADC is suitable for fast-changing analog signals, while the internal oscillator reduces the component count in designs that do not require an external crystal. The 256-byte RAM is modest, so firmware should avoid large buffering and should use Flash efficiently when capturing sampled data.
Typical applications include compact industrial controllers, digital measurement instruments, temperature-monitoring nodes, analog sensor interfaces, and embedded motor-control functions. The 3 mm × 3 mm QFN package is especially useful where PCB area is limited, while the exposed pad supports improved heat transfer when required by the selected board construction.
Designers should allocate the exposed-pad and ground structure carefully, place decoupling capacitors close to the supply pins, and confirm ADC settling time when sampling rapidly changing inputs. The exact base C8051F301 ordering code must also be selected for the required package and temperature grade rather than assuming that a related suffix is interchangeable.
This page consolidates verified manufacturer and distributor information, same-family drop-in candidates, package constraints, pricing references, and practical selection guidance. It also distinguishes the base C8051F301 from suffix-specific orderable parts and identifies unresolved technical data that should be checked against the manufacturer datasheet before release to production.
ドロップイン代替品: C8051F301 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: C8051F301 （同一形状・フットプリント） — 相違点: Package, Product Type.
C8051F300-GM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
C8051F302-GM
✅ ドロップイン📋 参考代替品（カタログ未掲載）
C8051F303-GM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
C8051F304-GM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
C8051F305-GM
✅ ドロップイン📋 参考代替品（カタログ未掲載）
C8051F301 最大定格＆電気的特性
| Core Architecture | 8-bit 8051 CISC core |
| 最大クロック周波数 | 25 MHz |
| Program Memory Size | 8 KB (8K × 8) Flash |
| RAM Size | 256 × 8 bytes (0.25 KB) |
| Number of I/O Pins | 8 pins |
| ADC Resolution | 8 bit |
| Maximum ADC Conversion Rate | 500 ksps |
| External ADC Inputs | 8 inputs |
| Programmable Amplifier | Programmable gains referenced to VREF or VDD |
| Integrated Temperature Sensor | Built-in sensor |
| Timer Count | 3 × 16-bit timers |
| Oscillator | Internal oscillator |
| 電源電圧 | 3.3 V |
| パッケージ | 11-QFN (3 mm × 3 mm) |
| Package Type | VFDFN exposed-pad package |
| 実装タイプ | Surface mount |
| Product Type | Mixed-signal system-on-chip MCU |
C8051F301 vfdfn exposed-pad package ピン配置ガイド
C8051F301 (vfdfn exposed-pad package パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: C8051F301.
詳細は データシート をご参照ください。
主な用途
C8051F301 の用途: 6 件s: Compact Industrial Sensor Interface, Temperature Monitoring Node, Digital Measurement Instrument, Low-Speed Motor and Actuator Control, Embedded Data Acquisition Module, Compact Programmable Control Panel.
Compact Industrial Sensor Interface
The C8051F301 fits compact industrial sensor interfaces because it combines an 8-bit, 500 ksps ADC with eight external inputs in a 3 mm × 3 mm 11-QFN package. It can acquire analog sensor data, apply programmable amplifier gains referenced to VREF or VDD, and process the result locally without a separate converter. Its 25 MHz 8051 core provides adequate control timing, while three 16-bit timers support periodic sampling and actuator updates. The principal limitation is 256 bytes of RAM, so designers should use streaming or immediate processing rather than large sample buffers and should verify ADC acquisition and settling requirements in the manufacturer datasheet.
おすすめ
Temperature Monitoring Node
The C8051F301 can serve as a compact temperature-monitoring node using its built-in temperature sensor together with its 500 ksps, 8-bit ADC. A firmware-controlled acquisition sequence can read the internal sensor or one of eight external analog inputs, apply calibration data, and drive an indicator or communications output. The internal oscillator reduces external component count, and the 25 MHz core supports responsive sampling and control. With only 256 bytes of RAM, the design should avoid storing long sample histories. Production engineers should confirm the internal sensor calibration, accuracy, ADC reference behavior, and operating-temperature limits from the datasheet.
おすすめ
Digital Measurement Instrument
The C8051F301 is appropriate for a digital measurement instrument requiring fast analog conversion in a small board area. Its 8-bit ADC can perform conversions at up to 500 ksps across eight external inputs, while the 25 MHz 8051 core handles sequencing, range control, and result processing. Three 16-bit timers provide useful timing for trigger intervals, acquisition windows, and display or communication updates. The 8 KB Flash footprint is adequate for compact instrument firmware, although the 256-byte RAM limits simultaneous buffering. Layout should preserve analog signal integrity and place the exposed-pad thermal and ground connection in accordance with the manufacturer package guidance.
おすすめ
Low-Speed Motor and Actuator Control
The C8051F301 can support compact actuator-control tasks where a fast 8051 core and multiple timers are more valuable than high data throughput. Its three 16-bit timers can divide time among PWM-related activity, input capture, or periodic sequencing, while the eight I/O pins provide digital control and status connections. Analog feedback can be monitored through the 500 ksps ADC, enabling a sensor-assisted control loop. The 25 MHz clock provides deterministic instruction execution, and the small QFN footprint assists miniaturization. Actual motor suitability depends on external driver selection, current limits, protection circuitry, and verified timing behavior, none of which are quantified in the supplied data.
おすすめ
Embedded Data Acquisition Module
The C8051F301 can serve as a small embedded data-acquisition module when the required sample rate is within the verified 500 ksps ADC capability and the firmware can process each result promptly. Eight analog inputs provide room for multiple sensor channels, while programmable amplifier gains referenced to VREF or VDD allow the front end to be scaled. The 25 MHz core and three 16-bit timers support acquisition sequencing and time-base generation. Because RAM is limited to 256 bytes, streamed processing or external storage is preferable to retaining large blocks of samples. Designers must also verify input bandwidth, conversion latency, settling time, and channel multiplexing behavior.
おすすめ
Compact Programmable Control Panel
The C8051F301 is suitable for a compact programmable control panel that reads analog inputs, evaluates local setpoints, and operates discrete outputs. Eight I/O pins support switches, indicators, relays, or interface signals, while the integrated ADC and temperature sensor can provide local monitoring. Its 8 KB Flash supports a focused control program, and the 25 MHz 8051 core handles responsive state-machine execution. Three 16-bit timers add scheduling flexibility for display updates, debounce timing, or periodic tasks. The 256-byte RAM remains the key limitation for extensive menus or logging, so panel firmware should use external nonvolatile storage or compact event records when those features are required.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: C8051F301 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | C8051F300-GM | C8051F302-GM | C8051F303-GM | C8051F304-GM | C8051F305-GM |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 11-QFN (3 mm × 3 mm) | 11-QFN (3 mm × 3 mm) - same | 11-QFN (3 mm × 3 mm) - same | 11-QFN (3 mm × 3 mm) - same | 11-QFN (3 mm × 3 mm) - same | 11-QFN (3 mm × 3 mm) - same |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Program Memory | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash |
主な差別化要因
- Integrated fast mixed-signal acquisition （vs C8051F300-GM)
- Compact 11-QFN implementation （vs C8051F305-GM)
- Three dedicated 16-bit timing resources （vs C8051F302-GM)
- Verified distributor availability channels （vs C8051F304-GM)
設計ノート
Route analog inputs away from switching nodes and digital output edges. Place the MCU's decoupling capacitors close to the associated supply pins, connect the exposed pad according to the manufacturer's package drawing, and provide a low-impedance ground path for the ADC reference. Because the device is only 3 mm × 3 mm, PCB assembly limits and exposed-pad soldering should be reviewed before committing to the footprint.
Do not assume that every C8051F30x suffix has identical pin functions, temperature limits, or packing direction. The supplied manufacturer and distributor evidence identifies the 3 mm × 3 mm QFN configuration for C8051F301-GM and a separate C8051F301-GS listing, so the selected orderable suffix must be checked against the PCB footprint and production requirements. Firmware should also be rebuilt or validated for peripheral differences before replacing one family member with another.
The 3.3 V supply indication in the verified cross-reference data is not a substitute for the complete operating range and current limits. Before power-up, confirm minimum and maximum supply voltage, ADC reference limits, output-drive capability, and per-pin loading in the manufacturer datasheet. Use local bulk and high-frequency decoupling following the recommended application circuit, and account for any analog-reference noise that could affect measurement repeatability.
The 500 ksps rating describes conversion capability, not guaranteed input bandwidth or settled accuracy for every source impedance. Allow the ADC acquisition network to charge between samples, validate settling against the required resolution, and keep high-impedance sensor paths short. Use the documented programmable-gain configuration and VREF or VDD reference arrangement only after checking input-range and common-mode constraints.
The C8051F301 has 256 bytes of RAM, so code that buffers multiple ADC frames or retains extensive history may fail despite the 8 KB Flash program memory. Prefer streaming conversion, reduced sample retention, or external storage where necessary. Include stack and library usage in the resource budget, and remeasure timing at 25 MHz when using interrupts, timers, or multiple active peripherals.
コンプライアンス情報
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status for the base C8051F301. AEC-Q100 is marked not applicable because this is an industrial/consumer microcontroller entry rather than a verified automotive-qualified variant.
