C8051F044 - 25MHz 8-Bit MCU with 64KB Flash | Silicon Labs
料号： C8051F044 ✓ 量产中C8051F044 概述
An 8-bit microcontroller is a compact embedded-processing device that executes firmware from program memory and interacts with external hardware through digital and analog peripherals. The C8051F044 belongs to the mixed-signal MCU category, combining the 8051 instruction-set architecture with on-chip analog-to-digital conversion, comparator functions, timers, and communication interfaces. This integration allows a board to measure and control physical variables without requiring separate external converter ICs in many designs.
The device operates at 25 MHz and provides 64 kB, or 64K x 8 bits, of flash memory. Its on-chip RAM is 4.25 kB, while five 16-bit timers support periodic generation, timing, and event measurement. The integrated 10-bit ADC supports 13 channels at 100 ksps, and three comparators provide fast threshold detection for signals such as temperature, voltage, or industrial sensor outputs.
Communication and timing resources extend beyond the basic ADC and comparator functions. The C8051F044 includes integrated CAN and additional communication interfaces for connected industrial equipment. Its 100-pin QFP package exposes the mixed-signal resources and supports a conventional leaded or gull-wing footprint rather than a fine-pitch BGA arrangement, making assembly and prototype inspection comparatively accessible.
Typical uses include sensor acquisition and supervisory control, industrial communication nodes, motor or process monitoring, and embedded systems that require both analog measurements and deterministic control. The 13-channel ADC is useful for multichannel process inputs, while the comparators can generate fast threshold events without continuously sampling the analog domain.
A critical design consideration is the 14 x 14 mm, 100-pin footprint and the allocation of analog, digital, power, and communication pins. Designers should use the manufacturer package drawing and pinout documentation to confirm every net, preserve analog routing discipline, and provide suitable bypassing close to the supply pins.
This page consolidates the verified manufacturer and distributor information for the C8051F044, separates confirmed specifications from unavailable data, and provides practical application guidance and same-family drop-in candidates without presenting unsupported pricing or pin details as verified facts.
直接替换替代料： C8051F044 ——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： C8051F044 （相同外形与封装尺寸） ——差异在于 ADC Resolution, Package, Flash Memory, Communication Interface, Digital I/O Pins.
C8051F040
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →C8051F042
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →C8051F043
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →C8051F044 最大额定值与电气特性
| Microcontroller Type | 8-bit mixed-signal microcontroller |
| Processor Core | 8051 core |
| 最大时钟频率 | 25 MHz |
| Performance | 25 MIPS |
| Flash Memory | 64 kB (64K x 8 bits) |
| On-Chip RAM | 4.25 kB |
| ADC Resolution | 10 bits |
| ADC Channel Count | 13 channels |
| ADC Sampling Rate | 100 ksps |
| Comparator Count | 3 comparators |
| Timer Count | 5 timers |
| Timer Resolution | 16 bits |
| Communication Interface | Integrated CAN and additional communication interfaces |
| Package Type | 100-pin QFP |
| Package Dimensions | 14 x 14 mm |
C8051F044 14 x 14 mm 引脚配置指南
C8051F044（14 x 14 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： C8051F044.
请参阅 数据手册 以查看完整引脚配置。
典型应用
C8051F044 适用于 6 应用s: Industrial Sensor Acquisition, CAN-Connected Control Node, Data Acquisition and Logging, Threshold and Alarm Monitoring, Precision Process Control, Embedded Communications Controller.
Industrial Sensor Acquisition
The C8051F044 fits multichannel industrial measurement because its 10-bit ADC supports 13 channels at 100 ksps while the 25 MHz 8051 core performs local filtering, scaling, and supervisory logic. The device can place a conditioned 0-to-10 V process signal or scaled sensor output into a shared acquisition architecture without requiring a separate converter for every channel. Five 16-bit timers support periodic sampling and event timing, while the three comparators can establish independent alarm thresholds. A practical benefit is consolidated analog and digital processing in one 100-pin QFP. Designers must still verify the input-voltage limits, source impedance requirements, acquisition timing, reference accuracy, and whether the production design requires isolation or automotive qualification.
推荐
CAN-Connected Control Node
The C8051F044 is appropriate for an industrial CAN control node because it combines an integrated CAN interface with a 25 MHz 8051 core, five 16-bit timers, and mixed-signal peripherals. It can execute control logic, monitor analog channels, and exchange node status over CAN within one device rather than separating communications and acquisition into unrelated components. The 13-channel, 100 ksps ADC supports process supervision, while the comparators can flag threshold events between periodic readings. The design advantage is reduced component count and a consolidated firmware model, although a separate CAN transceiver is normally required because the MCU does not provide the physical bus driver. Firmware, termination, isolation, protocol timing, and transceiver selection must be validated for the final network.
推荐
Data Acquisition and Logging
For compact data-logging equipment, the C8051F044 can acquire up to 13 analog channels through its 10-bit, 100 ksps ADC and process samples with its 25 MHz core. The 64 kB flash program memory supports firmware storage, while 4.25 kB of RAM provides working space for buffering and data handling. Multiple 16-bit timers make it possible to organize acquisition intervals, communication events, and data-transfer windows. Compared with a system using a separate ADC and general-purpose controller, the integrated mixed-signal device can simplify board partitioning and firmware coordination. The application remains constrained by RAM capacity, flash endurance if samples are stored locally, analog accuracy, and input bandwidth; those values should be checked against the acquisition rate and logging interval before implementation.
推荐
Threshold and Alarm Monitoring
The C8051F044 is well suited to threshold-based monitoring because it combines three on-chip comparators with a 13-channel, 10-bit ADC and an 8051 control core. The comparators can respond to analog limits, while the ADC provides proportional measurements for display, logging, or more detailed diagnostics. This arrangement can reduce dependence on continuous software polling for basic limit detection, leaving the 25 MHz processor available for communications and supervisory tasks. Five 16-bit timers are also available for debounce, sampling, and alarm timing functions. Designers should account for comparator hysteresis, input common-mode range, reference accuracy, and the distinction between a fast comparator event and a periodically calculated ADC value before defining the system behavior.
推荐
Precision Process Control
The C8051F044 can serve as the local controller in a compact process-control subsystem where analog feedback, timers, and communications are needed in one mixed-signal MCU. Its 10-bit, 100 ksps ADC can capture process inputs, its comparators can provide fast limit detection, and five 16-bit timers can control sampling, actuation, or maintenance intervals. The 25 MHz core provides deterministic instruction throughput for basic control loops and supervisory functions. Integration can simplify the hardware and software architecture compared with a separate ADC, logic controller, and timer device. Suitability depends on the required loop rate and control accuracy, which must be compared against the detailed timing and converter characteristics in the current manufacturer datasheet. External drivers may still be needed for actuators and isolation barriers.
推荐
Embedded Communications Controller
The C8051F044 is suitable for an embedded communications controller that must also perform local analog supervision. Its integrated CAN interface supports networked equipment, while the additional communication interfaces and five 16-bit timers provide resources for message handling and periodic tasks. The 13-channel ADC allows the same controller to monitor power, temperature, or process signals and transmit the resulting status over the network. A 64 kB flash and 4.25 kB RAM provide dedicated firmware and working memory for a compact embedded design. The main benefit is integration: fewer separate interface components can reduce board complexity and simplify firmware coordination. Designers still need to choose the correct physical-layer transceiver, define termination, validate protocol timing, and ensure that communication workload does not interfere with required sampling deadlines.
推荐
工程参考数据： C8051F044 ——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 | C8051F040 | C8051F042 | C8051F043 | C8051F046 | C8051F047 |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 100-pin QFP, 14 x 14 mm | 100-pin QFP | 100-pin QFP | 100-pin QFP | 100-pin QFP | 100-pin QFP |
| Processor Core | 8051, 8-bit | 8051 family, 8-bit | 8051 family, 8-bit | 8051 family, 8-bit | 8051 family, 8-bit | 8051 family, 8-bit |
关键差异点
- Documented multichannel mixed-signal resource set （对比 C8051F043)
- 25 MHz control and acquisition performance （对比 C8051F040)
- 64 kB flash and 4.25 kB RAM integration （对比 C8051F042)
设计说明
Treat the 100-pin QFP footprint and analog routing as a layout-critical constraint. Place the device's required decoupling capacitors directly beside their associated supply pins, use a short and continuous return path for analog inputs, and keep switching nodes and communication edges away from the 13 ADC channels. Because the verified snippets do not provide the complete pin table, derive every footprint, exposed pad, and analog connection from the current manufacturer package drawing rather than inferring pins from adjacent schematic symbols.
Design each analog input for the C8051F044's 10-bit, 100 ksps ADC with appropriate source impedance and acquisition time. Place input filtering close to the MCU, protect sensitive nodes from switching noise, and verify that the reference and supply arrangements meet the limits in the current datasheet. The three comparators can support threshold detection, but their input range, offset, hysteresis, and response behavior must also be checked before using them as direct protection or safety functions.
Do not treat a shared C8051F04x package as proof of a drop-in substitution. The five family candidates listed here require verification of power pins, ADC channels, comparator assignments, timers, CAN availability, memory size, clocking, and software configuration. Remove the C8051F044-GQR order-code variant from substitution consideration because it represents a distinct ordering suffix and was not included as a separate engineering alternative.
合规信息
The supplied manufacturer and distributor snippets do not provide explicit compliance declarations. Automotive qualification, RoHS, REACH, lead-free status, halogen-free status, and conflict-minerals compliance therefore remain unknown.
