MK2304S-1LF - 133MHz Zero-Delay Clock Buffer | Renesas

Processor Clock Distribution

The MK2304S-1LF fits a processor clock-distribution point that requires up to 133 MHz operation and four related outputs from one clock source. Its verified 1:4 input-to-output ratio allows one clock input to feed several destinations while the active zero-delay buffer reduces the loading presented to the oscillator. The designer should verify the complete processor clock specification, including cycle-to-cycle jitter, rise and fall times, and board-level skew, against the Renesas timing data. Placement close to the clock source, short traces, solid ground planes, and local decoupling remain important because a nominal 133 MHz rating alone does not guarantee acceptable timing at the load pins.

Memory Clock Buffering

The MK2304S-1LF is applicable to a memory clock tree that operates at or below the verified 133 MHz maximum and needs one-to-four clock distribution. The CMOS output stage can isolate the source clock from several memory-controller loads, reducing the risk that one long or capacitive route prevents the remaining destinations from receiving usable signals. The critical design checks are output-edge quality, propagation delay, output skew, and the allowable clock-input duty cycle. PCB trace-length matching and termination may matter more than raw buffer bandwidth, so engineers should measure skew at the actual memory device rather than assume that equal schematic lengths guarantee acceptable timing.

Communication Equipment Clock Fan-Out

The MK2304S-1LF can distribute a reference clock through a communication module when the operating rate remains within the verified 133 MHz limit. Its single clock input and 1:4 output ratio support a source clock feeding four related destinations, such as interface, conversion, or digital-control blocks. The zero-delay-buffer description indicates an attempt to minimize added latency, while the low-skew positioning is useful when multiple phases must retain predictable relationships. A production design must still account for source jitter, accumulated board skew, capacitive loading, and supply sensitivity. Controlled-impedance routing and an uninterrupted return path are therefore necessary even though the component itself is specified for only a 3 V to 3.6 V supply range.

Digital Test and Measurement Equipment

The MK2304S-1LF is suitable for clock-distribution sections of legacy digital test equipment operating below 133 MHz. Four outputs from a single input can feed counters, capture logic, programmable dividers, or interface stages while reducing source loading. Because instrumentation timing margins may be narrow, the designer should obtain the manufacturer’s propagation-delay and output-skew limits and evaluate them together with fixture and cable delays. Short traces, symmetric routing, and local clock decoupling help prevent the buffer from becoming the dominant source of edge displacement. The verified 8-SOIC footprint also supports conventional PCB assembly, but pin labels must be taken directly from the Renesas datasheet before schematic capture and layout release.

Industrial Control Logic

The MK2304S-1LF can serve a 133 MHz-or-lower control-logic clock tree in industrial equipment where one oscillator must drive several digital subsystems. Its verified 1:4 ratio and CMOS outputs provide a compact way to organize clock routing and reduce source loading. Industrial designs should examine the manufacturer’s operating-temperature limits because those values are not available in the supplied search excerpts, and they should include power-supply noise filtering in the clock-quality budget. A solid ground plane, short output routes, and placement near the clock source help minimize radiated and conducted sensitivity. Any proposed replacement should be checked for identical pin mapping and timing because the cross-reference data does not establish universal compatibility.

Legacy Synchronous Logic

The MK2304S-1LF supports legacy synchronous-logic designs whose clock frequency is no greater than the verified 133 MHz maximum and whose CMOS logic can use a 1:4 clock relationship. Active buffering can reduce sensitivity to long-trace loading while providing four output branches for sequential blocks. The relevant selection criteria are not limited to frequency: propagation delay, output skew, duty-cycle distortion, and supply-current behavior determine whether the device preserves the intended system timing. Engineers should verify these parameters in the Renesas manufacturer datasheet and perform endpoint measurements after PCB assembly. If substituting another MK2304-series device, the footprint, pin names, output ratio, and timing limits must all be confirmed rather than inferred from the ordering suffix.