C8051F311 - 25MHz Mixed-Signal MCU with 16KB Flash | Silicon Labs
料号： C8051F311 ✓ 量产中C8051F311 概述
An 8-bit microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals on one mixed-signal system-on-chip. The C8051F311 belongs to the 8051-compatible microcontroller family and combines digital control with on-chip analog conversion and comparison functions. Its 25 MHz core supports up to 25 MIPS, while 16 kB of Flash stores firmware and 1.25 kB of RAM supports working data.
The principal features are a 10-bit ADC with 17 channels and 200 ksps conversion capability, two on-chip comparators, and four 16-bit timers. The manufacturer product page also identifies on-chip power-on reset and additional communication interfaces. These resources reduce the need for external converters, timers, and interface circuitry in moderately complex embedded systems while keeping the board area compact.
Technically, the device integrates a high-speed pipelined 8051-compatible core with mixed-signal peripherals in a 5 mm by 5 mm QFN28 package. The ADC can use an external reference or the device supply according to the verified manufacturer description. Because this is an MCU rather than a power semiconductor, SOA data is not applicable, and thermal design focuses on package power dissipation, copper area, and ambient temperature rather than a Safe Operating Area graph.
Typical uses include industrial sensor acquisition, building-control modules, compact instrumentation, digital control panels, and low-cost embedded control products. A firmware-driven ADC task can sample up to 17 channels, while the timers and comparators support thresholding, periodic measurement, motor-related timing, or local alarm functions. The 16 kB Flash limit and 1.25 kB RAM should be checked against the final firmware and buffering requirements.
Designers should preserve clean analog grounding, place decoupling capacitors close to the supply pins, and route analog inputs away from fast digital signals. Because the verified material provides only a QFN28 package description and no complete verified pin table, the package outline can be identified without assigning unsupported signal names to individual pins. Firmware should also account for reset behavior and analog-reference accuracy.
This product record combines the verified manufacturer specifications, distributor availability information, package details, and procurement data with an explicit review of drop-in alternatives. It also identifies where pin assignments, environmental limits, and comparative peripheral data require confirmation in the manufacturer datasheet before a new design is released.
直接替换替代料： C8051F311 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： C8051F311 （相同外形与封装尺寸） ——差异在于 ADC Resolution, Package, Flash Memory, ADC Input Configuration, Core Architecture.
C8051F310-GM
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
C8051F312-GM
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
C8051F313-GM
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
C8051F317-GM
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
C8051F311 最大额定值与电气特性
| Product Type | Mixed-signal 8-bit microcontroller |
| CPU Core | 8051-compatible |
| 最大时钟频率 | 25 MHz |
| Maximum CPU Performance | 25 MIPS |
| Flash Memory | 16 kB |
| RAM | 1.25 kB |
| ADC Resolution | 10 bit |
| ADC Input Channels | 17 channels |
| ADC Sampling Rate | 200 ksps |
| Comparator Count | 2 |
| Timer Count | 4 x 16-bit |
| Power-On Reset | On-chip |
| 封装 | QFN-28, 5 mm x 5 mm |
| 安装类型 | Surface mount |
| RoHS 状态 | unknown |
| REACH Status | unknown |
C8051F311 qfn-28, 5 mm x 5 mm 引脚配置指南
C8051F311（qfn-28, 5 mm x 5 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： C8051F311.
请参阅 数据手册 以查看完整引脚配置。
典型应用
C8051F311 适用于 6 应用s: Industrial Sensor Acquisition, Building Control and HVAC, Compact Digital Control Panel, Portable Instrumentation Module, Threshold Monitoring and Alarm System, Embedded Data Acquisition Node.
Industrial Sensor Acquisition
The C8051F311 fits compact sensor-acquisition modules because its 10-bit ADC provides 17 channels at up to 200 ksps while the four 16-bit timers support periodic sampling and timeout handling. The MCU can scan analog inputs, apply calibration in its 16 kB Flash program area, and use the 1.25 kB RAM for temporary sample data. Two on-chip comparators can provide threshold alarms without an external comparator. The tradeoff is limited RAM and program space, so designs should avoid large local buffers and prefer streamed or scaled data.
推荐
Building Control and HVAC
The C8051F311 is suitable for distributed building-control nodes that monitor several analog sensors and drive simple alarms or actuators. Its 17-channel ADC reduces the need for external multiplexers, while the 200 ksps conversion capability supports responsive sampling beyond typical thermal or occupancy-sensor requirements. The 25 MHz core can coordinate communication interfaces, timers, and comparator thresholds in firmware. Because the verified material does not specify the exact communication protocols or automotive qualification, the chosen C8051F311 suffix must be checked against the deployment environment.
推荐
Compact Digital Control Panel
A compact control panel can use the C8051F311 for local keypad or menu processing, analog adjustment inputs, timing functions, and communication with a remote controller. The 8051-compatible core operates at up to 25 MIPS, giving firmware capacity for user-interface state machines and communications in a device measuring only 5 mm by 5 mm. Its four 16-bit timers are useful for debouncing, periodic updates, and motor or relay timing, although the 1.25 kB RAM requires disciplined buffer sizing.
推荐
Portable Instrumentation Module
The C8051F311 can serve as the processing engine in a portable measurement module where a low-power footprint and mixed-signal integration are important. The 10-bit ADC supports up to 17 sampled inputs, while 16 kB Flash holds configuration tables, calibration constants, and measurement routines. Its small QFN28 package permits a dense PCB, and the 200 ksps ADC rate can support fast sampling when the selected input source and bandwidth permit it. Battery life and analog accuracy must be evaluated with the complete operating-voltage and power-consumption data from the manufacturer datasheet.
推荐
Threshold Monitoring and Alarm System
The two integrated comparators make the C8051F311 appropriate for threshold monitoring, where sensed voltage or current is compared against a reference and an event triggers firmware action. The 25 MHz core can handle event logging, debounce timing, and communication, while the four 16-bit timers support long intervals or precise measurement windows. Compared with a discrete comparator and separate microcontroller arrangement, the integrated implementation can reduce board area. Designers must still validate input common-mode range, reference accuracy, and response timing against the datasheet.
推荐
Embedded Data Acquisition Node
The C8051F311 is well suited to a small data-acquisition node that periodically samples up to 17 analog channels and forwards processed values over an available communication interface. Its 200 ksps ADC provides ample rate for many slow industrial signals, while 16 kB Flash stores acquisition firmware and 1.25 kB RAM supports a rolling sample buffer. The 5 mm by 5 mm QFN28 package helps minimize board size. Firmware should avoid blocking conversions and use timer-driven sampling so communication and measurement tasks remain responsive.
推荐
推荐产品汇总
工程参考数据： C8051F311 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | C8051F310-GM | C8051F312-GM | C8051F313-GM | C8051F317-GM | C8051F321 |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
关键差异点
- Integrated 17-channel mixed-signal conversion （对比 C8051F321)
- Compact 28-pin implementation （对比 C8051F317-GM)
- Deterministic timing resources （对比 C8051F313-GM)
设计说明
Place all required bypass capacitors close to the corresponding C8051F311 supply pins and provide a low-impedance ground reference. The verified material confirms a compact QFN28 implementation but does not provide exact capacitance values, so component selection must follow the manufacturer datasheet rather than generic assumptions. Keep analog inputs short, provide a quiet analog return path, and reserve the exposed pad connection and land pattern according to the official package drawing.
Route analog inputs away from the 25 MHz core clock and other fast digital nets, and treat analog ground references as a carefully planned return-current problem. If ADC precision matters, keep external sensor networks close to the MCU, minimize trace resistance, and place any required RC filtering close to the relevant input. The verified 10-bit, 17-channel, 200 ksps ADC specification establishes converter capability, but application accuracy also depends on reference stability, source impedance, and layout.
Do not substitute a related C8051F31x device based only on family name or package appearance. Check the exact suffix, pin names, power pins, analog pins, exposed-pad requirements, clock configuration, memory size, and peripheral assignments against the manufacturer datasheet. The alternatives in this record are same-brand family candidates sourced from llm_knowledge because the supplied web results did not provide verified comparative specifications; each requires engineering confirmation before use.
合规信息
The verified search results do not explicitly provide RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements for C8051F311. Obtain current compliance documentation from Silicon Labs before production release.
