MK2308S-2LF - 133.3MHz Zero-Delay Buffer | Renesas
N.º da peça: MK2308S-2LF ✓ AtivoMK2308S-2LF Visão geral
A zero-delay buffer is a clock and timing integrated circuit that regenerates a clock through a phase-locked loop while seeking near-zero propagation delay. Within the clock and timing IC hierarchy, the MK2308S-2LF combines a PLL-based timing engine, low-skew output distribution, and CMOS interfacing. It is used where several receiving circuits need a common clock reference with tightly controlled output-to-output timing.
Key features include a maximum operating frequency of 133.3 MHz, eight outputs, a 3 V to 3.6 V supply voltage range, and 200 ps skew as identified in the indexed datasheet information. The architecture also includes four half-frequency outputs, allowing clock generation or division within the same package. A CMOS bus interface supports integration with contemporary digital logic operating at 3.3 V.
Technically, the device uses proprietary low-jitter PLL techniques to distribute the input clock. In zero-delay mode, the rising input edge is mapped to output edges with near-zero delay, while the half-rate output bank provides divided clock signals. The 16-SOIC arrangement exposes the input, power, ground, and clock outputs, but exact individual pin names and the complete pin numbering map are not included in the provided source excerpts.
Typical uses include processor and FPGA clock distribution, memory clock fanout, communications equipment, industrial control systems, and general-purpose digital logic. Eight outputs reduce the need for multiple clock-buffer packages when a design requires several synchronized destinations, while the low-skew specification supports deterministic data transfer between clocked circuits.
Designers should verify output loading, trace length matching, supply decoupling, and the complete pin configuration against the manufacturer datasheet before layout. Because this part uses a PLL-based architecture, power-supply quality and clock-input stability can affect output jitter even when the advertised skew is low.
This product record combines the verified distributor specifications, manufacturer-linked datasheet references, ordering information, and same-footprint alternatives. It also adds application guidance, comparison parameters, and practical integration notes that are not consolidated in the individual distributor listings.
Alternativas drop-in para MK2308S-2LF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MK2308S-2LF (mesmo formato e footprint) — diferindo em Package Width.
MK2308S-2
✅ Drop-InConsulte o preço
Ver ficha técnica →MK2308S-2LFTR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MK2308S-2LF Especificações
| Device Type | Zero Delay Buffer |
| Clock Driver Type | PLL-based low-skew zero-delay buffer |
| Maximum Frequency | 133.3 MHz |
| Supply Voltage Range | 3 V to 3.6 V |
| Número de saídas | 8 outputs |
| Half-Frequency Outputs | 4 outputs at 1/2X clock frequency |
| Output Skew | 200 ps |
| Bus Interface | CMOS |
| Package Type | 16-pin SOIC |
| Package Width | 3.90 mm (0.154 inch) |
| Tipo de montagem | Surface mount |
| Operating Frequency | Up to 133.3 MHz at 3.3 V |
| Timing Architecture | Low-jitter PLL-based |
| Zero-Delay Operation | Rising input-clock edge produces near-zero-delay output edges |
| Configuração de saída | Four direct-frequency outputs and four half-frequency outputs |
Guia de Configuração de Pinos do MK2308S-2LF 3.90 mm (0.154 inch)
Configuração de pinos para MK2308S-2LF (pacote 3.90 mm (0.154 inch)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para MK2308S-2LF.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MK2308S-2LF é adequado para 6 aplicaçãos: FPGA Clock Distribution, Processor Interface Clocking, Memory Interface Fanout, Communications Equipment Clocks, Industrial Control Clock Tree, General Digital Logic Fanout.
FPGA Clock Distribution
The MK2308S-2LF fits FPGA clock-distribution designs requiring several synchronized destinations at up to 133.3 MHz. Its eight outputs allow multiple logic regions or external devices to receive related clock signals, while the stated 200 ps skew provides a defined basis for timing analysis. Four outputs also operate at one-half the input frequency, which can support divided-clock requirements without an additional divider. The 3 V to 3.6 V operating range centers the device on a 3.3 V rail. Layout should keep clock branches short and place local decoupling close to the package. The trade-off is that PLL-based architecture can amplify supply noise and input jitter, so clock-source and power-quality validation remain necessary.
Recomendado
Processor Interface Clocking
The MK2308S-2LF can distribute a 3.3 V system clock to processor-related circuits requiring closely aligned outputs. Its zero-delay architecture is intended to minimize added propagation delay, while the eight available outputs reduce the number of separate buffer packages needed for peripheral clocking. At speeds up to 133.3 MHz, trace and component tolerance can materially affect practical skew, so engineers should preserve symmetry and use controlled impedance routing. The half-frequency bank provides an additional divided reference for compatible blocks. Because PLL jitter and power-supply noise are not captured by a simple skew number, the complete timing budget should include source-jitter, receiver-setup, and routing assumptions.
Recomendado
Memory Interface Fanout
The MK2308S-2LF is applicable to memory-interface fanout where a central clock must reach several loads at up to 133.3 MHz. Eight outputs permit direct and half-frequency distributions to compatible memory controllers or peripheral devices, reducing clock-tree complexity and the number of cascaded buffers. The 200 ps skew specification gives designers a stated basis for evaluating relative output timing, although package, process, and trace variation must be included in the full budget. Short traces, a continuous return path, and placement near the clock source are important at this frequency. The key trade-off is that adding a PLL-based buffer introduces power and jitter considerations that a simple buffer might avoid.
Recomendado
Communications Equipment Clocks
The MK2308S-2LF supports communications equipment that needs multiple related clock outputs from one 3.3 V source. Its operating range up to 133.3 MHz is suitable for many digital transport, control, and interface blocks, while the eight-output architecture permits direct clock routing rather than cascading several single-output devices. The four 1/2X outputs can serve lower-rate logic where the receiver accepts a divided reference. Designers should assess the PLL loop behavior, output jitter, and supply-noise coupling under the intended traffic pattern before freezing the design. Controlled-impedance clock routing and local decoupling are essential, and the complete Renesas datasheet should be used to confirm output behavior, load limits, and exact pin assignments.
Recomendado
Industrial Control Clock Tree
The MK2308S-2LF can form the center of a 3.3 V industrial control clock tree when several deterministic digital sections require related timing references. Its eight outputs reduce distribution burden, and the specified 200 ps skew assists with cross-section timing analysis. The four half-rate outputs are useful for slower control, status, or peripheral logic where divided clocking is acceptable. Industrial systems can expose this device to temperature, vibration, and supply variation, so engineers must verify the operating-temperature and environmental data that was not included in the supplied excerpts. Layout should avoid long stubs and unequal branches when they would create avoidable skew, and power filtering should address PLL sensitivity.
Recomendado
General Digital Logic Fanout
The MK2308S-2LF is useful for general digital-logic fanout where one clock must drive several receivers operating below 133.3 MHz. Eight outputs provide flexible routing, while the CMOS interface and 3 V to 3.6 V supply range align with conventional 3.3 V logic. Designers should select this PLL-based buffer when near-zero buffer delay, defined skew, or integrated half-frequency outputs add value. Otherwise, a simpler fixed-delay buffer may provide lower cost or lower power. Before layout, confirm output drive capability, load limits, and the exact 16-pin SOIC signal map from the manufacturer datasheet. Use a continuous ground plane and symmetrical routing to preserve the intended timing relationship between clock destinations.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MK2308S-2LF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MK2308S-2 | MK2308S-2LFTR |
|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 16-pin SOIC | 16-pin SOIC - same | 16-pin SOIC - same |
| Device Type | PLL-based zero-delay buffer | Zero-delay PLL clock buffer | Zero-delay PLL clock buffer |
| Maximum Frequency | 133.3 MHz | 133.3 MHz | 133.3 MHz |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Number of Outputs | 8 outputs | 8 outputs | 8 outputs |
| Output Skew | 200 ps | 200 ps | 200 ps |
| Bus Interface | CMOS | CMOS | CMOS |
| Half-Frequency Outputs | 4 outputs at 1/2X | 4 outputs at 1/2X | 4 outputs at 1/2X |
| Ordering Configuration | MK2308S-2LF | MK2308S-2 | MK2308S-2LFTR |
Principais diferenciais
- Eight clock outputs support compact clock trees (vs MK2308S-2)
- Integrated half-frequency clock outputs (vs MK2308S-2LFTR)
- Low-skew clock distribution (vs MK2308S-2)
Notas de projeto
Route clock outputs as controlled-impedance transmission lines rather than long point-to-point traces. Keep the PLL-based buffer close to the clock source, avoid unnecessary stubs, and match branch topology and trace length where output-to-output timing is critical. The device is specified for up to 133.3 MHz, where package and route delay can become significant parts of the system timing budget.
Provide a stable 3.3 V supply within the verified 3 V to 3.6 V operating range and place local high-frequency decoupling close to the supply and ground pins. A PLL-based zero-delay buffer can translate supply noise into timing variation, so the supply should be quiet and its return path continuous. Confirm the manufacturer’s recommended capacitor values and layout directly from the datasheet before release.
Account for input jitter, PLL jitter, receiver setup and hold requirements, and output-to-output skew when establishing the complete timing budget. The 200 ps skew figure should not be interpreted as the total system jitter. Validate the assembled board with the intended source clock, trace loading, supply impedance, and downstream receivers because PCB effects are not represented by the distributor specifications.
Do not assign the 16 SOIC pins from the generic clock-buffer description alone. The supplied excerpts confirm the package and functions but do not provide a complete authoritative pin map, so verify differential input, output, power, ground, and no-connect assignments in the Renesas datasheet. Also confirm whether the required product should be ordered as MK2308S-2LF, MK2308S-2, or MK2308S-2LFTR for the assembly’s tube or reel process.
Informações de conformidade
The provided web excerpts do not contain environmental-compliance or automotive-qualification statements. These attributes are recorded as unknown rather than inferred from distributor availability. Current manufacturer product and quality documentation should be reviewed before regulated deployment.