MK2308G-1HI - 133MHz Zero-Delay Buffer | Renesas Electronics
N.º de pieza: MK2308G-1HI ✓ ActivoMK2308G-1HI Descripción general
A zero-delay buffer is a clock-and-timing IC that receives a reference clock and redistributes it through a phase-locked loop or equivalent edge-alignment architecture. The zero-delay designation indicates that the device compensates propagation delay between the reference input and its outputs so downstream circuits can receive closely aligned clock edges. Within the broader hierarchy, the MK2308G-1HI is a clock buffer, which is a clock-and-timing IC and, ultimately, a semiconductor used for system clock distribution and phase alignment.
The principal verified features are a maximum operating frequency of 133 MHz, a 3 V to 3.6 V supply range, CMOS clock outputs, and PLL operation with bypass. The single-circuit configuration is useful when a board requires one regenerated clock rather than several independently buffered outputs. Its 16-pin TSSOP package is compatible with conventional surface-mount assembly, while its 4.40 mm stated package width supports compact PCB layouts where the TSSOP mechanical envelope is acceptable.
The PLL-based architecture separates the reference source from the distributed clock output and enables zero-delay clock regeneration. PLL bypass provides a direct-input test path that can assist board bring-up and fault isolation. Actual timing performance depends on input-clock stability, output loading, trace geometry, supply integrity, and the selected operating mode, so engineers should consult the Renesas datasheet and evaluate the complete clock path rather than relying on the maximum frequency alone.
Typical uses include processor and FPGA clock distribution, memory-interface clock support, communications equipment, industrial control systems, and test-and-measurement instruments. The part is particularly relevant to 3.3 V designs where a regenerated clock is needed to improve edge alignment or isolate a clock source from downstream loading. In each case, trace length matching, return-path continuity, and output-load budgeting remain important implementation considerations.
For a new layout, reserve the TSSOP land pattern, route the reference clock away from high-current switching nodes, and provide the decoupling arrangement specified by the manufacturer. If the PCB cannot support controlled clock topology, replacing the device without changing routing may not resolve timing or signal-integrity issues. Confirm operating mode, load, frequency, and package details against the current Renesas documentation before release.
This page consolidates verified distributor specifications, manufacturer datasheet information, practical clock-design guidance, and honestly qualified replacement references. It separates confirmed drop-in candidates from merely similar devices, helping engineers compare package and lifecycle constraints without treating cross-reference search results as guaranteed equivalents.
Alternativas directas para MK2308G-1HI — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
MK2308G-1HILFTR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MK2308G-1HILF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MK2308G-1HI Especificaciones
| Device Type | Zero-delay buffer |
| Maximum Frequency | 133 MHz |
| Number of Circuits | 1 circuit |
| Supply Voltage Range | 3 V to 3.6 V |
| Tipo de salida | CMOS |
| PLL | Yes, with bypass |
| Input Signal | Clock |
| Encapsulado | 16-TSSOP, 4.40 mm width |
| Tipo de montaje | Surface mount |
| Input Clock Frequency | Up to 133 MHz |
| Estado RoHS | unknown |
| REACH Status | unknown |
Guía de configuración de pines de MK2308G-1HI 16-tssop, 4.40 mm width
Configuración de pines para MK2308G-1HI (encapsulado 16-tssop, 4.40 mm width). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MK2308G-1HI.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MK2308G-1HI es adecuado para 6 aplicacións: FPGA Clock Distribution, Processor and Memory Clock Support, Industrial Control Systems, Communications Equipment, Test and Measurement Instruments, Embedded Data Acquisition.
FPGA Clock Distribution
The MK2308G-1HI can regenerate a 133 MHz reference clock for an FPGA or other digital logic that benefits from edge alignment. Its verified 3 V to 3.6 V operating range fits 3.3 V systems, while the PLL-based architecture provides a zero-delay distribution function and a bypass path for testing. The device is most appropriate when one regenerated clock rail is required and the board can preserve controlled trace geometry. Engineers should confirm FPGA input timing, maximum operating frequency, output loading, and clock-source jitter before installation.
Recomendado
Processor and Memory Clock Support
The MK2308G-1HI is applicable to processor and memory-interface clock-support networks where regenerated clock edges and low skew are important. Its maximum verified frequency of 133 MHz supports the stated operating class, and the single-circuit architecture is appropriate when each clock domain requires a dedicated buffer. Placed near the receiving device, it can isolate the distribution load from the master oscillator. Validation should include input-to-output timing, board-level jitter, return-path continuity, and the processor's allowed clock topology.
Recomendado
Industrial Control Systems
Industrial controllers often distribute a common clock among measurement, communication, and sequencing subsystems. The MK2308G-1HI provides a 133 MHz zero-delay buffering option with CMOS outputs in a 3.3 V supply environment. Regenerating the clock can improve edge alignment when loading or routing would otherwise distort the reference signal. For factory equipment, verify EMC susceptibility, grounding, temperature requirements, and long-term supply status because the supplied excerpts do not specify the operating-temperature range or lifecycle guarantee.
Recomendado
Communications Equipment
The MK2308G-1HI can support clock distribution in 3.3 V communications equipment where a single 133 MHz clock must be distributed consistently to digital logic. Its PLL bypass function provides a direct-input test route during board diagnostics, while the zero-delay mode supports normal regenerated operation. Interface devices such as Ethernet PHYs or differential transceivers can be sensitive to clock quality and crosstalk, so the clock trace should remain short, impedance controlled, and physically separated from high-speed data and switching-current paths.
Recomendado
Test and Measurement Instruments
A zero-delay clock buffer is useful in test and measurement equipment that must generate coherent sampling or reference clocks across multiple circuit blocks. The MK2308G-1HI supports up to 133 MHz and includes PLL bypass for direct testing of the input path. It is suitable where one regenerated reference clock is needed rather than a multi-channel synthesizer. Measurement accuracy still depends on the reference oscillator, clock-jitter contribution, output loading, and measurement-instrument input requirements, all of which should be characterized at the system level.
Recomendado
Embedded Data Acquisition
The MK2308G-1HI can provide a regenerated clock for embedded acquisition and control boards that sample or process data at up to 133 MHz. A single CMOS clock circuit in a compact 16-TSSOP package leaves board area available for other functions, while PLL bypass assists signal-path troubleshooting. The design must ensure that acquisition converters, processors, and memory share compatible clock phases. Confirm acquisition timing budgets, trace skew, loading, and grounding at the actual operating frequency before production release.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MK2308G-1HI — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MK2308G-1HILFTR | MK2308G-1HILF |
|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Device Type | Zero-delay buffer | Zero-delay buffer | Zero-delay low-skew buffer |
| Maximum Frequency | 133 MHz | 133 MHz | 133 MHz |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3.3 V |
| Output Type | CMOS | CMOS | CMOS |
| PLL Bypass | Yes | Yes | Yes |
| Number of Circuits | 1 | 1 | 1 |
| Mounting Type | Surface mount | Surface mount | Surface mount |
Diferenciadores clave
- Verified 133 MHz operating class (frente a MK2308G-1HILFTR)
- Same 16-TSSOP footprint (frente a MK2308G-1HILF)
- Integrated PLL bypass (frente a MK2308G-1HILFTR)
Notas de diseño
Place the MK2308G-1HI close to the load that requires regenerated clock edges, and route the reference input as a short, controlled-impedance trace. Maintain a continuous return path beneath the clock route and avoid sharing narrow neck regions with switching-power or high-speed data nets. The PLL and bypass functions do not eliminate PCB skew, so length relationships must be evaluated against the receiving device's timing budget.
Operate the device only within the verified 3 V to 3.6 V supply range. Provide low-inductance decoupling close to the supply and ground terminals using the capacitor values and layout specified by the manufacturer datasheet. Since no verified supply-current value was provided, do not size the upstream regulator from a generic zero-delay-buffer assumption; obtain the worst-case current from the authoritative document.
Characterize the complete clock path at the intended operating frequency rather than relying only on the 133 MHz maximum. Include source impedance, output loading, PCB loss, clock jitter, and receiver thresholds in the timing analysis. Use PLL bypass as a deliberate diagnostic state only if the downstream logic permits a direct-source clock, because bypassing changes which phase relationship is present at the outputs.
Información de cumplimiento
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or package.
