C8051F231 - 25MHz 8KB Flash 32-LQFP MCU | Silicon Labs
部品番号: C8051F231 ✗ 生産終了| 数量 | 単価 | 小計 |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
C8051F231 概要
A microcontroller is a programmable integrated circuit that integrates a CPU core, memory, I/O ports, timers, serial interfaces, and analog or mixed-signal peripherals on one package. Within the semiconductor hierarchy, the C8051F231 belongs to the 8-bit microcontroller and embedded-processing categories. Its 8 KB Flash stores firmware, while its 256-byte RAM supports working variables, stack operations, and short-lived control data.
The C8051F231 provides 22 I/O pins, a 25 MHz clock, two comparators with programmable hysteresis, configurable comparator interrupts or reset behavior, a VDD monitor, and a brown-out detector. Its on-chip JTAG debug circuit supports full-speed, non-intrusive in-system debugging without an external emulator, which can shorten firmware bring-up and board validation. These features make it useful where compact mixed-signal control is required.
The C8051F231 is positioned for embedded control, sensor acquisition, industrial monitoring, and low-cost peripheral control. Its 2.7 V to 3.6 V operating range suits systems using regulated 3.3 V rails, while the 32-LQFP package provides a conventional surface-mount footprint for PCB assembly. Compared with larger microcontrollers, its 8 KB Flash and 256-byte RAM constrain application size, so firmware budgeting and peripheral sharing are important.
For analog signal conditioning, the integrated comparators can monitor thresholds and cooperate with the VDD monitor and brown-out detector. The brown-out detector helps supervise the supply, while the VDD monitor supports power-related detection. Exact threshold, timing, and electrical limits should be confirmed from the manufacturer datasheet before production release.
The principal design consideration is resource planning. Allocate Flash and RAM before adding libraries, and avoid assuming that a general-purpose 8051 replacement will preserve firmware timing, startup behavior, or peripheral compatibility. Validate the pin multiplexing, interrupt vectors, clock configuration, debug interface, and mixed-signal routing on the assembled PCB.
This product data synthesizes verified distributor listings, package information, memory and clock specifications, and practical design guidance. It is intended as an engineering starting point, not as a substitute for the complete Silicon Labs datasheet, errata, or application-specific validation.
ドロップイン代替品: C8051F231 — 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。
クイック比較ツール — 並列比較する代替部品を選択:
C8051F231-GQ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
C8051F231-GQR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
C8051F231 最大定格＆電気的特性
| Product Type | 8-bit mixed-signal microcontroller |
| Processor Family | C8051F2xx |
| Maximum Clock Speed | 25 MHz |
| Program Memory | 8 KB (8K × 8) Flash |
| RAM | 256 × 8 bits |
| Number of I/O Pins | 22 |
| 電源電圧 | 2.7 V to 3.6 V |
| パッケージ | 32-LQFP, 7 mm × 7 mm |
| Architecture | 8-bit |
| Analog Peripherals | Two comparators |
| Comparator Hysteresis | Programmable |
| Comparator Functions | Configurable to generate interrupts or reset |
| Voltage Monitoring | VDD monitor and brown-out detector |
| Debug Interface | On-chip JTAG debug circuitry |
| Debug Method | Full-speed, non-intrusive in-system debug |
| External Emulator Requirement | No |
| Flash Type | ISP Flash |
| 実装タイプ | Surface mount |
| Manufacturer Description | 25 MIPS, 8 kB Flash, 32-pin mixed-signal MCU |
C8051F231 32-lqfp, 7 mm × 7 mm ピン配置ガイド
C8051F231 (32-lqfp, 7 mm × 7 mm 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: C8051F231.
詳細は データシート をご参照ください。
主な用途
C8051F231 の用途: 6 件s: Embedded Sensor Monitoring, Industrial Control Panel, Low-Voltage Power Monitoring, Small Motor or Actuator Controller, Portable 3.3 V Embedded Device, Programmable Threshold Logic.
Embedded Sensor Monitoring
The C8051F231 fits compact sensor-monitoring designs that need threshold detection, local control, and supervised power behavior. Its two comparators provide programmable hysteresis and can generate interrupts or resets, allowing a controller to react to sensor or system thresholds without continuous software polling. The 25 MHz 8-bit core provides useful response margin for short control loops, while the 8 KB ISP Flash and 256-byte RAM impose a compact firmware budget. Place the MCU beside the sensor interface, use separate analog and digital routing where possible, and confirm comparator input limits in the manufacturer datasheet.
おすすめ
Industrial Control Panel
C8051F231 can serve as the local controller in a compact industrial control panel where discrete inputs, status indicators, and a regulated 3.3 V rail are required. Its 22 I/O pins provide a substantial external interface for digital sensing and output control, while the brown-out detector and VDD monitor add useful supply supervision. The 2.7 V to 3.6 V operating range fits regulated 3.3 V systems. Firmware should define startup states, safe outputs during reset, and debounce behavior because the verified data does not specify all electrical timing or pin details.
おすすめ
Low-Voltage Power Monitoring
The C8051F231 is suitable for a low-voltage supply-monitoring module that must observe a 3.3 V system and report fault states locally. Its VDD monitor and brown-out detector provide dedicated supply-related functions, while the comparator peripherals can support additional threshold inputs. The MCU can periodically evaluate status, drive an indicator, and retain a fault state in its available RAM or nonvolatile firmware resources. Validate the monitor thresholds, startup behavior, and reset timing against the complete manufacturer datasheet before defining production alarm limits.
おすすめ
Small Motor or Actuator Controller
C8051F231 can control small actuator or relay-related functions when the load is driven through suitable external circuitry. The 22 I/O pins and 25 MHz processing rate support sequencing, timeout handling, and simple closed-loop supervision, while the integrated comparators can monitor feedback thresholds. The MCU is not a power driver and should not directly drive motors or high-current loads; use transistors, protection, flyback paths, and an appropriate power stage. Validate inductive transients and supply disturbances against the verified electrical limits.
おすすめ
Portable 3.3 V Embedded Device
C8051F231 is appropriate for a compact portable or edge-control device powered from a regulated 3.3 V rail. Its small 32-LQFP package supports space-conscious board construction, and the mixed-signal peripherals reduce the need for separate threshold logic in suitable designs. The 8 KB Flash and 256-byte RAM require disciplined code and data allocation, especially if adding communication protocols or buffered sensing. Use low-leakage external components and verify brown-out behavior during load transitions to prevent unintended resets.
おすすめ
Programmable Threshold Logic
The C8051F231 can implement programmable threshold logic for systems that need two comparator inputs with adjustable hysteresis. Comparator events can trigger interrupts or resets, allowing the MCU to combine fast hardware response with firmware-level filtering and state management. This arrangement is useful for battery, signal-level, or safety-adjacent monitoring where a continuous software comparator loop would waste CPU resources. Treat comparator thresholds and reset behavior as design-critical parameters: confirm input ranges, propagation timing, and noise immunity in the manufacturer documentation before setting production thresholds.
おすすめ
エンジニアリング参考データ: C8051F231 — 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 | C8051F231-GQ | C8051F231-GQR |
|---|---|---|---|
| Package | 32-LQFP (7 mm × 7 mm) | LQFP, 32-pin | LQFP, 32-pin |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
主な差別化要因
- Mixed-signal integration （vs C8051F231-GQ)
- Integrated debugging （vs C8051F231-GQR)
- Compact embedded footprint （vs C8051F231-GQ)
設計ノート
Design the C8051F231 around a regulated 3.3 V rail within the verified 2.7 V to 3.6 V operating range. Place the device supply decoupling close to the supply pins and verify the datasheet-specified capacitor values and voltage tolerance before layout release. Because the MCU includes a VDD monitor and brown-out detector, test reset behavior during load transients and supply ramp conditions rather than assuming the rail remains valid throughout startup.
Reserve clean routing for the 32-LQFP footprint and keep the on-chip JTAG interface accessible for programming and validation. Separate sensitive comparator inputs from switching nodes and high-current return paths where the board layout permits. The verified data does not include the complete pin map, so do not assign power, ground, reset, programming, or analog pins until the manufacturer package drawing is checked.
The C8051F231 has only 8 KB of Flash and 256 bytes of RAM, so include library code, interrupt vectors, stack depth, and buffers in the memory budget. A generic 8051 replacement is not automatically compatible even if its instruction set appears similar. Validate clock initialization, peripheral multiplexing, interrupt vectors, startup code, and JTAG programming against the target device before releasing production firmware.
Use the comparator inputs and VDD monitor for their intended sensing functions only after checking the verified input limits and threshold behavior. Keep analog traces short, provide a defined reference to the MCU ground, and avoid routing threshold signals beneath noisy switching paths. If the comparator generates a reset or interrupt, validate noise immunity and debounce behavior in hardware because firmware filtering cannot correct an unsafe electrical excursion.
コンプライアンス情報
The supplied verified search data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for C8051F231. Compliance must be confirmed from the manufacturer product documentation or current distributor records.
