C8051F302 - 25MHz 8KB Flash Mixed-Signal MCU | Silicon Labs
Référence : C8051F302 ✓ ActifC8051F302 Présentation
A mixed-signal microcontroller is a semiconductor that combines a digital processing core with analog and timing peripherals on one device. In the product hierarchy, the C8051F302 belongs to the 8-bit microcontroller family, operates as an embedded control IC, and integrates memory, timers, communication interfaces, and mixed-signal resources into a single system-on-a-chip. This integration reduces external component count and simplifies compact control boards.
Key verified features include 25 MHz processing performance, 8 kB of flash memory, 0.25 kB of RAM, and three 16-bit timers. The family operates from 2.7 V to 3.6 V across the industrial temperature range of -45°C to +85°C. Port I/O and reset pins tolerate input signals up to 5 V, providing additional interface margin in systems containing 5 V signals. The 11-QFN, 3 x 3 mm package supports space-constrained production designs.
The 8051-compatible pipelined core combines familiar 8-bit instruction-set concepts with execution at 25 MHz. Flash memory retains firmware without a separate external memory device, while the on-chip RAM provides working storage for control logic. The three 16-bit timers support periodic timing, input capture, output compare, and other time-dependent functions commonly required by embedded products. The two C2 interface pins can be shared with user functions, allowing in-system debugging without permanently consuming dedicated package pins.
Typical uses include compact sensor controllers, industrial measurement modules, digital control boards, and embedded timing systems. A 25 MHz MCU can execute acquisition, filtering, and control tasks while the integrated timers coordinate periodic operations. For designs requiring more flash, RAM, analog resources, or communication peripherals, the C8051F300 through C8051F305 family provides related options that should be selected against a complete peripheral and memory comparison.
The principal design consideration is the limited 0.25 kB RAM at 25 MHz. Firmware should use RAM efficiently, avoid unnecessary deep call nesting, and place buffer-heavy operations in external memory or a higher-RAM MCU when required. Board layouts must also preserve access to the shared C2 debug interface and provide compliant decoupling for the 2.7 V to 3.6 V supply.
This page consolidates verified manufacturer information, distributor availability, family-level alternatives, package details, and practical design guidance. It is intended to help engineers evaluate the C8051F302 for compact embedded control designs while identifying which specifications require final confirmation from the complete Silicon Labs datasheet.
Alternatives de remplacement direct pour C8051F302 — 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 C8051F302 (même facteur de forme et même empreinte) — différant par Flash Memory, Processor Core, Product Type.
C8051F300-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F301-GM
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
C8051F303-GM
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
C8051F304-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
C8051F305-GM
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
C8051F302 Valeurs maximales et caractéristiques électriques
| Product Type | Mixed-signal 8-bit system-on-a-chip microcontroller |
| Processor Core | 8051-compatible core |
| Fréquence d'horloge maximale | 25 MHz |
| Flash Memory | 8 kB |
| RAM | 0.25 kB (256 bytes) |
| Timers | 3 x 16-bit timers |
| Operating Voltage Range | 2.7 V to 3.6 V |
| Industrial Temperature Range | -45°C to +85°C |
| Port I/O and Reset Input Tolerance | Up to 5 V |
| Debug Interface | 2 shared C2 interface pins |
| Boîtier | 11-pin QFN, 3 x 3 mm |
| Type de montage | Surface mount |
| Architecture | 8-bit |
| On-Chip Memory | 8 kB flash and 0.25 kB RAM |
Guide de configuration des broches du C8051F302 11-pin qfn, 3 x 3 mm
Configuration des broches du C8051F302 (boîtier 11-pin qfn, 3 x 3 mm). 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 C8051F302.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
C8051F302 convient pour 6 applications: Compact Industrial Sensor Controller, Digital Timing and Control Module, In-System Programmable Control Board, Embedded Measurement Front End, Low-Power Embedded Control Node, Communication Interface Controller.
Compact Industrial Sensor Controller
The C8051F302 fits compact industrial sensor controllers because its 25 MHz 8051-compatible core can execute acquisition and control logic while three 16-bit timers organize periodic sampling or actuation. Its 2.7 V to 3.6 V operating range and -45°C to +85°C industrial temperature specification suit regulated 3.3 V equipment. The 11-pin QFN package measures 3 x 3 mm, reducing board footprint in distributed sensing nodes. Designers should use a 256-byte RAM budget carefully, avoid large local buffers, and confirm analog peripheral requirements against the C8051F30x datasheet.
Recommandé
Digital Timing and Control Module
The C8051F302 is well suited to digital timing modules because it combines three 16-bit timers with a 25 MHz processor in a compact QFN-11 package. Multiple timer channels can support repeatable intervals, input capture, output compare, or motor-control timing functions without relying on a larger external timer device. The verified 8 kB flash stores application firmware, while 0.25 kB of RAM supports modest state machines. Engineers should calculate worst-case execution time, reserve stack space, and verify that the selected timer channels and alternate-function pins meet the board requirements.
Recommandé
In-System Programmable Control Board
The C8051F302 supports compact in-system programmable control boards by combining flash-resident firmware with two C2 interface pins that can be shared with user functions. This shared debug arrangement preserves package space while allowing programming and debugging access during development, manufacturing, and field service. Its 25 MHz execution speed and three 16-bit timers are useful for coordinating peripheral activity. The PCB must preserve the shared C2 signal paths, and production firmware should avoid depending on debug functions that are unavailable in the deployed operating state.
Recommandé
Embedded Measurement Front End
The C8051F302 can serve as the digital front end of a compact embedded measurement system because its mixed-signal MCU architecture places an 8051-compatible 25 MHz processor, timers, flash, and RAM in one package. The controller can digitize measurements, apply control logic, and update outputs within a small 3 x 3 mm footprint. Since the supplied data does not quantify the target's ADC channels or sample rate, the complete family datasheet must verify conversion performance and analog inputs before committing to a design. The 0.25 kB RAM also favors streaming or bounded sample processing.
Recommandé
Low-Power Embedded Control Node
The C8051F302 can form the core of a compact embedded control node where a 25 MHz MCU must execute logic in a small 3 x 3 mm package. Its 2.7 V to 3.6 V supply range supports 3.3 V regulated systems, while flash preserves firmware during power removal and three 16-bit timers support scheduled background work. Actual standby or shutdown behavior is not quantified in the verified data and must be checked in the datasheet. Power-conscious designs should therefore avoid assuming a specific sleep current until it is confirmed for the selected operating mode.
Recommandé
Communication Interface Controller
The C8051F302 may be used in compact communication-interface controllers when its verified 25 MHz processing speed and integrated timers are adequate for protocol timing. The 8051-compatible core can coordinate framing, timeout handling, and responses while flash stores the protocol stack and 0.25 kB of RAM holds transient packet state. The supplied search results mention additional communication interfaces but do not identify the target's specific protocol channels, baud-rate range, or electrical interface ratings. Designers must verify those details in the manufacturer datasheet before assigning UART, CAN, or other communication functions to the package pins.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour C8051F302 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | C8051F300-GM | C8051F301-GM | C8051F303-GM | C8051F304-GM | C8051F305-GM |
|---|---|---|---|---|---|---|
| Package | QFN-11 (3 x 3 mm) | QFN-11 (3 x 3 mm) | QFN-11 (3 x 3 mm) | QFN-11 (3 x 3 mm) | QFN-11 (3 x 3 mm) | QFN-11 (3 x 3 mm) |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
Principaux différenciateurs
- Compact 3 x 3 mm mixed-signal implementation (vs C8051F300-GM)
- Three integrated 16-bit timing resources (vs C8051F304-GM)
- Verified industrial voltage and temperature operation (vs C8051F301-GM)
Notes de conception
Do not treat the 5 V input tolerance of the port I/O and reset pins as permission to operate the C8051F302 from 5 V. The verified supply range is 2.7 V to 3.6 V. A 5 V-tolerant input can remain below the powered supply threshold during specific conditions, but the complete datasheet electrical limits must govern every pin state. Design the supply for 3.3 V operation and verify mixed-voltage sequencing before attaching external signals.
Budget the MCU's RAM before writing application firmware. At 25 MHz, the C8051F302 provides only 0.25 kB of RAM, so a large sampling buffer, recursive call chain, or library copy can exhaust memory. Prefer streaming data, bounded buffers, and static allocation where practical. Verify the linker map and worst-case stack depth, then test under the most interrupt-intensive operating condition rather than relying only on normal-path builds.
Preserve access to both C2 interface pins even though they can be shared with user functions. Place the programming or debug connector so its routing does not compromise the shared signal paths or introduce excessive loading. Follow the Silicon Labs package drawing and reference layout for exposed-pad connection, solder mask, land pattern, and assembly requirements. The verified data confirms QFN-11 and 3 x 3 mm dimensions but does not provide the detailed land pattern.
Keep the 2.7 V to 3.6 V supply rail stable at the C8051F302 and place local high-frequency bypass capacitance close to the device power pins. Use the manufacturer-recommended capacitor values and topology from the full C8051F30x datasheet because the supplied data does not state them. Keep switching-regulator and high-current return paths away from sensitive analog and debug routes, and include test points that allow supply ripple and ground integrity to be checked during validation.
Informations de conformité
The supplied manufacturer and distributor search results do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for C8051F302. AEC-Q100 is not applicable because the device is an industrial mixed-signal MCU and no automotive qualification was stated.
