C8051F313 - 25 MHz Mixed-Signal 8051 MCU | Silicon Labs
MPN: C8051F313 ✓ ActiveC8051F313 Overview
A mixed-signal microcontroller integrates digital control, analog measurement, and communications in one device. The C8051F313 belongs to the C8051 family of 8-bit MCUs, combining an embedded 8051-compatible processing core with ADC, comparator, timer, and communication peripherals. This hierarchy places it within the broader embedded-control and power-management IC categories used in industrial sensing, instrumentation, and compact control systems.
Key features include a 25 MHz pipelined 8051-compatible core, 8 kB of Flash for in-system programming, and 1.25 kB of internal RAM. Its analog subsystem includes a 10-bit ADC with 17 channels and a maximum sampling rate of 200 ksps, plus two comparators for threshold detection and signal conditioning. Four 16-bit timers support timing, waveform generation, and periodic control tasks.
The device integrates an in-system, full-speed, non-intrusive debug interface and on-chip power-on reset according to the manufacturer product information. The C8051F31x family is positioned for compact embedded products that need mixed-signal measurement without a separate analog device. Additional communication interfaces are listed by Silicon Labs, but their individual types are not identified in the supplied source data.
Typical applications include industrial sensor nodes, analog measurement boards, compact motor and process controllers, communication modules, and test equipment. The 200 ksps ADC supports sampled analog monitoring, while the 17 GPIO and four timers allow peripheral control, timing, and external signal acquisition within one device.
A key design consideration is that the exposed-pad QFN footprint requires careful PCB layout and thermal management. Follow the manufacturer's land-pattern and exposed-pad connection guidance, place bypass capacitors close to the supply pins, and verify the required operating and storage voltage limits against the full datasheet before layout release.
This page consolidates manufacturer specifications, distributor pricing, pin-package details, and drop-in replacement guidance into one engineering-focused reference. It also identifies the parameter data that remains unavailable in the supplied sources, allowing procurement and design decisions to be traced to verified product information.
Drop-in alternatives for C8051F313 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with C8051F313 (same form factor and footprint) — differing in Package, ADC Resolution, RAM, Timers, Core Architecture.
C8051F311-GM
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F326-GMR
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F312-GM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
C8051F314-GM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
C8051F315-GM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
C8051F313 Maximum Ratings & Electrical Characteristics
| Core | 8051-compatible, 25 MHz |
| Maximum CPU Performance | 25 MIPS |
| Program Memory | 8 kB Flash (8K x 8) |
| RAM | 1.25 kB (1.25K x 8) |
| ADC Resolution | 10 bit |
| ADC Channels | 17 |
| ADC Sampling Rate | 200 ksps |
| Comparators | 2 |
| Timers | 4 x 16-bit |
| GPIO | 25 pins |
| Package | 28-pin QFN, 5 x 5 mm |
| Package Type | 28-VFQFN with exposed pad |
| Mounting Type | Surface mount |
| Debug Interface | In-system, full-speed, non-intrusive debug |
| Power-On Reset | On-chip |
| Clock Speed | 25 MHz |
| RoHS Compliance | Compliant |
| REACH Compliance | Compliant |
C8051F313 28-vfqfn with exposed pad Pin Configuration Guide
Pin configuration for C8051F313 (28-vfqfn with exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for C8051F313.
Refer to the datasheet for full pin configuration.
Typical Applications
C8051F313 is suitable for 6 applications: Industrial Sensor Node, Compact Analog Measurement Board, Process Control and Valve Controller, Communication Module Interface Controller, Battery-Powered Data Logger, Test and Measurement Front End.
Industrial Sensor Node
The C8051F313 fits compact industrial sensor nodes because its 10-bit ADC provides 17 acquisition channels at up to 200 ksps while the 25 MHz core handles sampling control and local processing. Its 25 GPIO pins can support discrete sensors, digital inputs, and actuator-control signals without a large external peripheral controller. Four 16-bit timers provide periodic measurement, debouncing, and output-timing resources. The device also includes on-chip Power-On Reset and in-system debugging, which simplifies deterministic startup and field firmware maintenance.
Recommended
Compact Analog Measurement Board
The C8051F313 is appropriate for a dedicated analog measurement board requiring several sensor inputs and modest digital processing. Its 17-channel, 10-bit ADC samples at up to 200 ksps, allowing the controller to acquire multiple analog inputs and apply filtering or threshold decisions. The four 16-bit timers can pace conversions and trigger events, while the 25 available GPIO pins handle range selection or instrumentation control. Firmware can use 8 kB of Flash for calibration tables and measurement routines.
Recommended
Process Control and Valve Controller
The C8051F313 suits compact process-control loops where analog measurements, digital setpoints, and timed outputs must be handled locally. The 10-bit ADC can monitor a pressure or level signal, and its four 16-bit timers support proportional-integral control timing, sampling intervals, and valve-actuator updates. With 25 GPIO pins and 1.25 kB of RAM, the controller can maintain state for filtering and simple control loops. Its 8 kB Flash capacity is appropriate when the application does not require a large communications stack.
Recommended
Communication Module Interface Controller
The C8051F313 can act as the embedded controller around a communication module because its 8051-compatible core executes at 25 MHz and the manufacturer describes additional communication interfaces on the device. Its 25 GPIO pins allow module reset, mode selection, and status monitoring, while the four 16-bit timers support frame timing or host-interface timeouts. The 10-bit, 17-channel ADC is useful for supply, bias, or diagnostic measurements. Firmware capacity must remain within 8 kB Flash unless the design is revised.
Recommended
Battery-Powered Data Logger
The C8051F313 is appropriate for a battery-powered data logger when low power is prioritized and the measurement rate is moderate. Its on-chip Power-On Reset supports repeatable startup, while the ADC can capture sensor values at up to 200 ksps when higher-rate sampling is needed. Timers can schedule periodic logging, and 1.25 kB of RAM accommodates short acquisition buffers. However, the minimum operating voltage, quiescent current, and analog accuracy are not quantified in the supplied data and must be checked before selecting the device for a power-limited design.
Recommended
Test and Measurement Front End
The C8051F313 can serve as the control front end of a compact test or measurement system. Its 17 ADC channels provide flexible analog input multiplexing, and the 25 MHz core can execute acquisition sequencing and limit checking within 8 kB of Flash. Four 16-bit timers offer accurate interval generation for stimulus timing, while 25 GPIO pins support trigger routing and instrument mode control. The in-system debug interface accelerates firmware development, although accuracy, reference voltage, and calibration specifications require review in the complete datasheet.
Recommended
Recommended Products Summary
Engineering reference data for C8051F313 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | C8051F311-GM | C8051F326-GMR | C8051F312-GM | C8051F314-GM | C8051F315-GM |
|---|---|---|---|---|---|---|
| Package | QFN-28 (5x5 mm) | QFN-28 (5x5 mm) | QFN-28 (5x5 mm) | QFN-28 (5x5 mm) | QFN-28 (5x5 mm) | QFN-28 (5x5 mm) |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
Key Differentiators
- Verified 17-channel ADC without a separate analog package (vs C8051F311-GM)
- Exact 8 kB Flash fit for controlled firmware sizing (vs C8051F311-GM)
- Documented same-family replacement path (vs C8051F326-GMR)
Design Notes
Use the manufacturer 28-VFQFN exposed-pad land pattern rather than a generic 28-pin QFN footprint. The exposed pad is a thermal and electrical connection and must be tied to the appropriate power or ground plane exactly as directed by the datasheet. Confirm via the manufacturer drawing that the package suffix changes only ordering or temperature information rather than land geometry.
Place the required bypass capacitors directly beside the VDD and ground connections, with the shortest possible return path. Because the supplied excerpt does not state the input-voltage range, regulator configuration, or internal supply requirements, do not select external regulators or capacitor values until the complete electrical specifications and reference schematic have been reviewed. Verify startup behavior against the on-chip Power-On Reset requirements.
Route analog inputs away from switching nodes and high-current outputs, and provide a quiet ground path for the ADC and comparators. The 10-bit ADC is intended for compact mixed-signal measurement, but its usable accuracy still depends on reference-voltage quality, source impedance, acquisition timing, and layout. These analog parameters are not quantified in the retrieved excerpt, so the full datasheet's acquisition network and reference recommendations are required.
Do not treat the base family name C8051F313 as a complete orderable part number. The verified distributor results identify orderable suffixes including C8051F313-GM and C8051F313-GMR, and the $2.2374 LCSC price applies to the -GMR variant. Confirm the exact suffix, temperature grade, pinout, and reel orientation before ordering; suffix differences can change grade, packaging, or marking.
Compliance Information
RoHS and REACH compliance are reported in the supplied ETEI comparison material. The device is an industrial MCU rather than an AEC-Q100-qualified automotive device in the supplied data; lead-free, halogen-free, and conflict-minerals status are not stated.
