C8051F331 - 25MHz Mixed-Signal 8-Bit MCU | Silicon Labs
MPN: C8051F331 ✓ Hoạt độngC8051F331 Tóm tắt
An 8051-compatible MCU is an embedded microcontroller whose instruction set and register organization are based on the Intel 8051 architecture. Within the product hierarchy, the C8051F331 belongs to the mixed-signal microcontroller family, combining digital control, Flash program memory, RAM, timers, serial interfaces, and analog conversion functions. This integration reduces the number of external components required in sensor-control, data-acquisition, and compact embedded-control designs.
The C8051F331 operates at up to 25 MHz and provides 25 MIPS of processing performance. Its 8 KB Flash memory supports an 8K by 8-bit program-memory organization, while 768 bytes of RAM accommodate working data and stack operations. Four 16-bit timers support periodic events, timing measurements, and communication baud-rate generation. The integrated I2C, SPI, and UART interfaces enable the controller to connect to sensors, converters, displays, and external processors through several common serial protocols.
The on-chip analog resources include an ADC, a DAC, and one comparator. These peripherals allow a design to acquire real-world inputs and produce an analog output without requiring separate converters. On-chip Power-On Reset, VDD monitoring, and watchdog functions support reliable startup and supervision. The manufacturer describes the C8051F331 as an ISP Flash MCU, supporting in-system programming for programming and updating the embedded firmware.
Typical uses include industrial sensor nodes, compact data-acquisition modules, motor and actuator controllers, temperature-measurement equipment, and communication-enabled embedded systems. Its small QFN-20 footprint supports compact assemblies, although the exposed-pad construction requires deliberate PCB layout and thermal management. Engineers should also account for the limited 8 KB program memory when sizing firmware and application protocols.
For a new PCB, use the manufacturer datasheet to confirm the exact exposed-pad dimensions, decoupling requirements, programming signals, and pin assignments. For an existing QFN-20 design, do not assume that another C8051F33x member is interchangeable; compare memory, analog peripherals, timers, I/O availability, and package details before substituting a device. Verified distributor pricing and a manufacturer product page are summarized below for engineering selection and procurement planning.
Bộ thay thế dễ dàng lắp đặt cho C8051F331 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với C8051F331 (cùng hình factor và footprint) — khác nhau ở Package.
C8051F330-GM
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →C8051F320-GM
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
C8051F310-GM
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
C8051F313-GM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F331 Tỷ lệ tối đa & tính chất điện
| Device Type | Mixed-signal 8-bit microcontroller (MCU) |
| CPU Core | 8051-compatible core |
| Tần số xung maksimum | 25 MHz |
| Processing Performance | 25 MIPS |
| Program Memory Size | 8 KB (8K x 8) Flash |
| RAM Size | 768 bytes (768 x 8) |
| Number of I/O Pins | 17 pins |
| Timer Count | 4 x 16-bit timers |
| ADC Resolution | 12-bit ADC |
| DAC Resolution | 12-bit DAC |
| Comparator Count | 1 comparator |
| Serial Interfaces | I2C, SPI, and UART |
| Hộp | 20-VFQFN with exposed pad |
| Package Dimensions | 4 mm x 4 mm |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Program Memory Type | ISP Flash |
| Power-On Reset | On-chip Power-On Reset |
| Supply Monitoring | On-chip VDD monitor |
| Watchdog | On-chip watchdog |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân C8051F331 4 mm x 4 mm
Cấu hình chân cho C8051F331 (4 mm x 4 mm gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho C8051F331.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
C8051F331 phù hợp cho 6 Áp dụngs: Industrial Sensor Node, Compact Data-Acquisition Module, Motor and Actuator Controller, Temperature and Environmental Monitoring, Communication-Enabled Embedded Controller, Programmable Analog Signal Generator.
Industrial Sensor Node
The C8051F331 fits an industrial sensor node that must acquire analog measurements and communicate with a controller over a short serial link. Its 12-bit ADC and one comparator support direct sensing of temperature, pressure, level, or resistive bridges, while the 25 MHz 8051 core provides 25 MIPS for sampling, filtering, calibration, and alarm logic. I2C and SPI can connect local sensors and converters, while UART supports a host or service interface. Four 16-bit timers allow periodic sampling and communication timing. The main design constraint is the 8 KB Flash limit, which requires disciplined firmware sizing.
Được đề xuất
Compact Data-Acquisition Module
The C8051F331 can form the core of a compact data-acquisition module requiring analog input, local processing, and digital output. The 12-bit ADC and 768 bytes of RAM support sampled measurements, while the 12-bit DAC can generate a reference or test output. I2C and SPI provide flexible links to sensors, memory, or converters, and the UART can export processed data to a host. At 25 MHz, the MCU can perform digital filtering and control tasks in real time. Designers should partition memory carefully because 8 KB of Flash must accommodate the application, interrupts, and boot requirements.
Được đề xuất
Motor and Actuator Controller
The C8051F331 is suitable for compact motor or actuator control where timing precision, mixed sensing, and serial diagnostics are valuable. Its four 16-bit timers can organize PWM-related tasks, input capture, periodic control, and communication timing, while the comparator and ADC can monitor position sensors, current signals, or analog feedback. The 25 MHz core supports deterministic supervisory logic, and I2C, SPI, and UART allow configuration and status reporting. The 8 KB program-memory ceiling should be checked against the chosen control algorithm and safety features before implementation.
Được đề xuất
Temperature and Environmental Monitoring
The C8051F331 supports temperature and environmental monitoring by combining a 12-bit ADC with programmable digital peripherals and serial communications. A sensor conditioned into the ADC input range can be sampled at a rate determined by the application, while the comparator can provide a fast threshold function when appropriate. The UART, SPI, or I2C interface can report measurements to a display, logger, or remote controller. On-chip Power-On Reset, VDD monitoring, and a watchdog improve system supervision after startup, although their detailed thresholds and timing limits must be taken from the manufacturer datasheet.
Được đề xuất
Communication-Enabled Embedded Controller
The C8051F331 works well as a communication-enabled embedded controller when a board needs local control plus several standard serial interfaces. UART can connect to a host computer or radio module, I2C can operate sensors and configuration devices, and SPI can provide higher-speed access to converters or displays. The four 16-bit timers support baud-rate generation, frame timing, and periodic background tasks. With 8 KB Flash and 768 bytes of RAM, the device is best suited to compact protocol stacks and focused control tasks rather than large networking stacks or graphical user interfaces.
Được đề xuất
Programmable Analog Signal Generator
The C8051F331 can generate and monitor controlled analog signals because it combines a 12-bit DAC, a 12-bit ADC, and a comparator with a 25 MHz processor. A firmware-defined waveform, reference level, or excitation signal can be produced through the DAC, measured through the ADC, and checked by the comparator for threshold behavior. Serial interfaces permit parameter updates and result retrieval. Because the confirmed RAM is only 768 bytes, larger waveform tables should be streamed or generated algorithmically, and analog output filtering and reference design should follow the manufacturer guidance.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho C8051F331 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | C8051F330-GM | C8051F320-GM | C8051F310-GM | C8051F313-GM |
|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 20-VFQFN with exposed pad (4 mm x 4 mm) | 20-VFQFN with exposed pad (4 mm x 4 mm) | 20-VFQFN with exposed pad (4 mm x 4 mm) | 20-VFQFN with exposed pad (4 mm x 4 mm) | 20-VFQFN with exposed pad (4 mm x 4 mm) |
| CPU Core | 8051-compatible core | 8051-compatible core | 8051-compatible core | 8051-compatible core | 8051-compatible core |
Bảo phân biệt quan trọng
- Integrated mixed-signal conversion resources (vsC8051F313-GM)
- Four dedicated 16-bit timing resources (vsC8051F320-GM)
- Three integrated serial communication interfaces (vsC8051F310-GM)
- Confirmed program and working-memory configuration (vsC8051F330-GM)
Ghi chú thiết kế
Use the official C8051F331 land pattern and exposed-pad geometry rather than a generic 20-VFQFN footprint. The verified package is 4 mm by 4 mm, so courtyard, paste, and solder-mask definitions must be checked against the manufacturer drawing. Confirm whether the exposed pad is connected to ground or another net, then assign the appropriate copper and via pattern. A no-net or incorrectly connected pad can compromise thermal performance, assembly yield, or EMC behavior.
Provide the manufacturer's recommended local supply decoupling and route high-current return paths without forcing analog return current through sensitive input areas. The verified snippets identify an on-chip VDD monitor but do not provide the operating-voltage range, capacitor values, or power-consumption figures, so those values must not be guessed. Review the complete electrical table for operating voltage, startup current, and regulator requirements before finalizing the power tree and bulk-capacitor selection.
Keep ADC inputs, comparator inputs, and the DAC output away from switching nodes and high-current return paths. Use a continuous ground reference beneath the analog circuitry, minimize loop area, and follow the manufacturer's analog-layout guidance. Because the supplied data does not expose individual pin assignments, verify whether adjacent pins can be used for guard rings or isolation. Any filtering network should also be checked against the ADC acquisition requirements and the 25 MHz processing budget.
Do not treat the C8051F331, C8051F331-GM, and C8051F331-GMR labels as interchangeable at the ordering level. The verified distributor records use the -GM and -GMR suffixes for the 20-VFQFN package, while the base family MPN is also used in product listings. Confirm the full orderable MPN, reel configuration, exposed-pad requirements, and programming compatibility. Likewise, verify every same-family alternative because shared package dimensions do not establish identical pin functions or peripheral availability.
Thông tin tuân thủ
The supplied verified web data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The -40 C to +85 C operating range is confirmed by the LCSC listing but does not establish automotive qualification.
