C8051F311-GM - 25MHz 8-Bit MCU in QFN | Silicon Labs
Référence : C8051F311-GM ✓ ActifC8051F311-GM Présentation
A mixed-signal microcontroller integrates a microcontroller core, analog-to-digital conversion, digital peripherals, memory, and communication interfaces on one semiconductor. The C8051F31x family belongs to the broader 8051 microcontroller, embedded-control, and mixed-signal MCU hierarchy. This combination allows a compact design to acquire analog sensor signals, process them digitally, and control outputs without requiring separate analog and digital ICs.
Principal device features include a 25 MIPS pipelined 8051-compatible CPU, 16 KB of ISP Flash, 1.25 KB of RAM, and a 10-bit ADC. The 2.7 V to 3.6 V operating-voltage range suits low-voltage embedded systems, while the 28-QFN package supports compact surface-mount layouts. ISP programming simplifies firmware development and field updates when the device configuration supports the standard programming interface.
The C8051F31x architecture combines a deterministic 8-bit instruction set with pipelined execution, allowing control tasks and mixed-signal measurements to share one processor. The ADC provides a practical interface for potentiometers, resistive sensors, and analog monitoring nodes. Flash provides 16 KB for firmware storage, while 1.25 KB of RAM supports working variables, stack operations, buffers, and peripheral state.
Typical applications include industrial process monitoring, compact sensor nodes, laboratory instrumentation, temperature-control equipment, building controls, and low-cost embedded products. Its combination of a 10-bit ADC, 25 MIPS execution rate, and small QFN package is particularly useful when analog measurement and digital control must coexist on a space-constrained board.
Designers should confirm the exact peripheral set, oscillator configuration, pin multiplexing, and ADC requirements against the manufacturer datasheet before creating a PCB. Decoupling, exposed-pad layout, programming access, and analog-reference connections require careful implementation to preserve signal and thermal performance.
This product page combines the manufacturer specifications, distributor listings, family-level alternatives, package information, and practical design guidance to support component selection, firmware planning, and drop-in replacement assessment.
Alternatives de remplacement direct pour C8051F311-GM — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec C8051F311-GM (même facteur de forme et même empreinte) — différant par Package, Package Type, RAM.
C8051F310-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F312-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F313-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F315-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F320-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F322-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F311-GM Valeurs maximales et caractéristiques électriques
| Microcontroller Type | 8-bit mixed-signal microcontroller |
| CPU Core | 8051-compatible |
| Fréquence d'horloge maximale | 25 MHz |
| CPU Performance | 25 MIPS |
| Flash Memory | 16 KB |
| RAM | 1.25 KB |
| ADC Resolution | 10 bit |
| Tension d'alimentation de fonctionnement | 2.7 V to 3.6 V |
| Boîtier | 28-QFN (5 x 5 mm) |
| Package Type | QFN |
| Nombre de broches | 28 pins |
| Type de montage | Surface mount |
| Programming Interface | In-System Programming (ISP) |
| Process Technology | CMOS |
| Lead-Free Status | Lead free |
| Exposed Pad | Present |
Guide de configuration des broches du C8051F311-GM qfn
Configuration des broches du C8051F311-GM (boîtier qfn). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour C8051F311-GM.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
C8051F311-GM convient pour 6 applications: Industrial Sensor Node, Temperature Control Equipment, Laboratory Instrumentation, Building Control Module, IoT Edge Controller, Compact Data Acquisition Module.
Industrial Sensor Node
The C8051F311-GM fits an industrial sensor node that must acquire analog measurements and perform local control within a compact board. Its 10-bit ADC can process resistive, potentiometric, or other low-frequency sensor inputs, while the 25 MIPS 8051-compatible core supports sampling, filtering, and control logic. The 16 KB of Flash accommodates embedded application firmware, and 1.25 KB of RAM is sufficient for working variables and short buffers. Operation from 2.7 V to 3.6 V simplifies integration with low-voltage industrial sensor assemblies, while the 28-QFN 5 x 5 mm package limits board footprint. Confirm the required ADC channels and alternate-function pins in the manufacturer pin table.
Recommandé
Temperature Control Equipment
The C8051F311-GM is appropriate for compact temperature-control equipment because it combines a 10-bit ADC with a 25 MIPS control processor. A temperature sensor signal can be sampled through the ADC, processed against a setpoint, and used to adjust a heater, fan, or valve output. Its 16 KB Flash provides space for control code, calibration constants, and communication routines, while 1.25 KB of RAM supports state variables and timing. The compact 28-QFN package is helpful in handheld or panel-mounted instruments. The design must confirm ADC input availability, timer outputs, sensor type, and control-loop timing before component approval.
Recommandé
Laboratory Instrumentation
The C8051F311-GM can serve as the controller in compact laboratory instruments that combine analog measurement with an embedded user interface. Its 10-bit ADC supports front-panel sensing or process monitoring, and the 25 MIPS execution rate allows sampling routines and control functions to run without an external processor. The 16 KB Flash capacity is useful for instrument firmware and parameter tables, while 1.25 KB of RAM can hold measurement states and display buffers. Its 28-QFN 5 x 5 mm footprint supports dense instrument boards. Confirm the required serial interface, ADC input count, timer channels, and programming connector because not every C8051F31x member provides an identical peripheral set.
Recommandé
Building Control Module
The C8051F311-GM is suitable for a small building-control module that monitors analog environmental inputs and operates actuators through digital or timer-based outputs. Its 10-bit ADC can serve resistive temperature, light, or occupancy-sensing interfaces, while the 25 MIPS 8051-compatible core can execute control logic and communication tasks. A 2.7 V to 3.6 V operating range supports low-voltage embedded systems, and 16 KB of Flash provides room for application code. The small 28-QFN package assists compact DIN-module or distributed-controller layouts. Verify peripheral availability, watchdog behavior, clock requirements, and exposed-pad thermal design in the manufacturer documentation.
Recommandé
IoT Edge Controller
The C8051F311-GM can act as an IoT edge controller for a compact sensing and actuator interface. The 8051-compatible core executes local acquisition, thresholding, and state-machine tasks at up to 25 MIPS, while the 10-bit ADC conditions analog sensor inputs. The 16 KB of embedded Flash stores firmware and configuration data, and 1.25 KB of RAM handles transient state between communications. A 28-QFN package supports dense IoT boards without the footprint of a leaded package. Communication-interface availability and pin multiplexing must be verified for the selected family member, while antenna and RF circuitry remain separate from this mixed-signal MCU.
Recommandé
Compact Data Acquisition Module
The C8051F311-GM is well matched to a compact data-acquisition module requiring repeated analog sampling plus embedded processing. Its 10-bit ADC measures external sensor voltages, and the 25 MIPS core can perform filtering, calibration, event detection, and data formatting. The 16 KB Flash capacity accommodates acquisition firmware, while 1.25 KB of RAM supports rolling buffers and control state. The 28-QFN 5 x 5 mm package allows the module to fit into compact instrumentation. Review the ADC acquisition characteristics, sample-and-hold requirements, timing, reference configuration, and exact used pins before finalizing the circuit.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour C8051F311-GM — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | C8051F310-GM | C8051F312-GM | C8051F313-GM | C8051F315-GM | C8051F320-GM |
|---|---|---|---|---|---|---|
| Package | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) | 28-QFN (5 x 5 mm) |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| CPU Architecture | 8051-compatible, 8-bit | 8051-compatible, 8-bit | 8051-compatible, 8-bit | 8051-compatible, 8-bit | 8051-compatible, 8-bit | 8051-compatible, 8-bit |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Pin Count | 28 pins | 28 pins | 28 pins | 28 pins | 28 pins | 28 pins |
Principaux différenciateurs
- Twice the Flash capacity of the C8051F315-GM candidate (vs C8051F315-GM)
- Higher execution rate than basic 8051-class implementations (vs Basic 8-bit 8051-compatible controller)
- Integrated analog acquisition reduces external circuitry (vs Discrete 8051 controller with external ADC)
- Compact 5 x 5 mm package supports dense mixed-signal boards (vs Larger leaded 8051 controller package)
Notes de conception
Use the Silicon Labs C8051F31x package drawing as the authority for the 28-QFN land pattern and exposed-pad geometry. Place the required bypass capacitors close to the associated supply pins, provide a continuous ground reference, and connect the exposed pad through a thermal-via array as directed by the manufacturer. Do not substitute dimensions solely from the generic 5 x 5 mm package name, because pad and exposed-pad details can differ between device variants.
Keep analog inputs and the analog-reference path away from oscillator, programming, and fast-switching traces. Use a quiet ground strategy and avoid routing high-current return paths beneath sensitive ADC nodes. Where the circuit includes an external precision reference, isolate its return path and decouple its supply locally. Confirm which package pins provide analog functions because alternate-function assignments can differ among closely related C8051F31x devices.
Do not approve a replacement solely because it is described as a closest equivalent. Compare every pin used by the PCB, the 16 KB Flash requirement, available RAM, ADC channels, timer outputs, oscillator pins, programming signals, and all required interrupt sources. C8051F315-GM, for example, has 8 KB of Flash versus 16 KB for C8051F311-GM and can therefore fail when firmware exceeds its smaller memory budget. Document any approved substitution and repeat production testing.
Estimated: at a 3.3 V operating voltage and 20 mA total supply current, the device input power is approximately 0.066 W before subtracting I/O and internal dissipation, and no regulator-efficiency calculation applies because this is a digital mixed-signal MCU. Actual junction temperature depends on ambient temperature, output loading, clock activity, board construction, and exposed-pad heat spreading. Follow the manufacturer thermal guidance and measure the assembled board under worst-case operating conditions.
Informations de conformité
The C8051F311-GM listing identifies the device as lead free and CMOS. RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals status were not explicitly established by the available manufacturer-page and distributor information.
