MK2304S-2LF - 133MHz Zero-Delay Clock Buffer | Renesas
N.º de pieza: MK2304S-2LF ✓ ActivoMK2304S-2LF Descripción general
A zero-delay buffer is a clock and timing IC that compensates for clock-distribution path delay so multiple downstream devices can receive a common edge at approximately the same time. Within the product hierarchy, it is a clock buffer, a type of clock and timing integrated circuit and a specialized form of digital signal buffer. Unlike a conventional CMOS buffer, which introduces propagation delay, a PLL-based zero-delay buffer uses phase control to minimize delay through the device.
The MK2304S-2LF operates from 3 V to 3.6 V and supports operation up to 133 MHz. Its four low-skew CMOS outputs allow one input clock to feed several loads while limiting output-to-output timing variation. The device is identified as a clock driver with a 1:1 input-to-output ratio, making it suitable for distributed clocking rather than frequency multiplication or division. Its SOIC-8 surface-mount package also supports conventional automated board assembly.
Technically, the key benefit is the combination of low skew and zero-delay behavior at 133 MHz. The specified 400 ps skew provides a quantitative limit for output timing alignment, while the PLL-based architecture reduces insertion delay through the buffer. This is useful when several high-speed loads must be clocked consistently without allowing fanout traces or loading to create unacceptable arrival-time differences.
Typical uses include processor and memory clock distribution, communications equipment, graphics systems, peripheral clocking, and other digital systems operating at or below 133 MHz. The four-output configuration can reduce the number of separate clock-buffer circuits required when four related loads share the same source clock. Care should be taken to maintain controlled-impedance routing and provide proper decoupling close to the device.
Designers should verify output loading, trace length matching, supply-noise sensitivity, and unused-output termination against the manufacturer datasheet. Because the supplied web data does not include a complete pin table or guaranteed electrical limits for every parameter, those details should be confirmed in the manufacturer documentation before layout release.
This page consolidates the verified 133 MHz operating point, 3 V to 3.6 V supply range, four-output PLL architecture, 400 ps skew, package information, RoHS indication, distributor availability, and drop-in replacement findings into a design-oriented component reference.
Alternativas directas para MK2304S-2LF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MK2304S-2LF (mismo factor de forma y huella) — difiere en Package.
MK2304S-2
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MK2304-2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NB2304AI1DG
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NB2304AC1HDR2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CY2304SXC-1T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MK2304S-2LF Especificaciones
| Device Type | Zero-delay, low-skew buffer |
| Clock Driver Type | PLL-based clock driver |
| Maximum Operating Frequency | 133 MHz |
| Supply Voltage Range | 3 V to 3.6 V |
| Número de salidas | 4 CMOS outputs |
| Input-to-Output Ratio | 1:1 |
| Output Skew | 400 ps |
| Bus Interface | CMOS |
| PLL | Yes |
| Number of Circuits | 1 |
| Encapsulado | 8-pin SOIC, 3.90 mm width |
| Tipo de montaje | Surface mount |
| Nominal Body Width | 0.154 inch (3.90 mm) |
| Estado RoHS | RoHS compliant |
Guía de configuración de pines de MK2304S-2LF 8-pin soic, 3.90 mm width
Configuración de pines para MK2304S-2LF (encapsulado 8-pin soic, 3.90 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 MK2304S-2LF.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MK2304S-2LF es adecuado para 6 aplicacións: Processor Clock Distribution, Memory Interface Clocking, Communications Equipment, Industrial Control Systems, Peripheral Clock Fanout, Test and Measurement Systems.
Processor Clock Distribution
The MK2304S-2LF is suitable for distributing a common processor or controller clock to up to four related loads at frequencies through 133 MHz. Its PLL-based zero-delay architecture is intended to reduce insertion delay, while the specified 400 ps skew provides a defined limit for output timing variation. The four CMOS outputs can simplify a small clock tree by replacing separate one-to-one buffers. Engineers should route each output as a controlled-impedance transmission line, keep the traces short, and verify downstream setup and hold requirements against the 400 ps skew. The 3 V to 3.6 V supply range supports a nominal 3.3 V system, subject to correct decoupling and confirmation of the complete electrical limits in the manufacturer datasheet.
Recomendado
Memory Interface Clocking
The MK2304S-2LF can provide clock distribution for memory-facing logic operating at up to 133 MHz. Four low-skew outputs allow a source clock to reach multiple memory-interface or controller paths while limiting output-to-output timing uncertainty. Its 1:1 input-to-output ratio preserves the source frequency, making it more appropriate than a frequency-multiplying or dividing buffer when the upstream device already generates the required clock. Layout must account for the 400 ps skew specification, receiver timing margins, trace impedance, and crosstalk. Because the supplied verified material does not state output drive current, input capacitance, or operating temperature, the selected memory interface must be checked against the complete manufacturer electrical specification before release.
Recomendado
Communications Equipment
The MK2304S-2LF is appropriate for low-skew clock distribution within communications equipment operating at or below 133 MHz. A PLL-based zero-delay buffer helps reconcile propagation delay introduced by board traces, while four outputs support related digital channels or interface blocks. This can be valuable in line cards, routers, interface modules, and embedded communications controllers where several loads must receive a common reference. The 400 ps skew specification should be included in the end-to-end timing budget, and the 3.3 V clock network should use short return-path-complete routing. Engineers should verify jitter, supply sensitivity, output loading, and temperature performance against the complete datasheet because those detailed values are not present in the supplied web excerpts.
Recomendado
Industrial Control Systems
The MK2304S-2LF can distribute a 133 MHz-class clock across digital control blocks in industrial equipment where consistent edge timing is important. Four outputs reduce fanout from a single source clock, while the zero-delay architecture limits the accumulated delay introduced at the buffering stage. A practical design uses the buffer close to the branching point, short controlled-impedance traces, solid ground-plane continuity, and local supply decoupling. The specified 400 ps skew must remain compatible with controller, logic, and interface timing margins. Industrial temperature requirements, electromagnetic-emissions behavior, and detailed output loading should be confirmed in the manufacturer datasheet because the supplied verified records do not provide those limits or an automotive qualification statement.
Recomendado
Peripheral Clock Fanout
The MK2304S-2LF is well suited to small peripheral clock trees where one source must feed up to four related loads without adding ordinary buffer propagation delay. Its 1:1 ratio preserves the incoming clock frequency, and the 400 ps skew specification gives designers a measurable target for output alignment. This is useful for peripheral controllers, serial-interface logic, data converters, and FPGA-adjacent circuits operating below 133 MHz. The output assignment should be planned so each clock net has a defined endpoint and controlled return path. Load capacitance, trace length, termination, and output drive are [DATA_NEEDED: detailed output characteristics] in the supplied records and must be checked against the full manufacturer datasheet before final schematic and layout approval.
Recomendado
Test and Measurement Systems
The MK2304S-2LF is applicable to synchronized test and measurement systems that distribute a common digital clock to several acquisition, control, or processing blocks at up to 133 MHz. The four low-skew outputs help maintain edge alignment, while the zero-delay PLL architecture minimizes delay at the fanout point. For instrumentation, clock routing should preserve a continuous ground reference, avoid stubs, and use impedance-controlled geometry so reflections do not degrade source-synchronous timing. The 400 ps skew specification is a key part of the measurement uncertainty or acquisition-window budget. Detailed jitter, supply-current, and output-capacitance data are not supplied and must be obtained from the manufacturer datasheet before using the part in high-accuracy timing systems.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MK2304S-2LF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MK2304S-2 | MK2304-2 | NB2304AI1DG | NB2304AC1HDR2 | CY2304SXC-1T |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-pin SOIC | 8-SOIC | 8-SOIC |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | onsemi | onsemi | Cypress Semiconductor |
Diferenciadores clave
- Defined low-skew performance (frente a NB2304AC1HDR2)
- Four-output fanout (frente a CY2304SXC-1T)
- Documented supply-voltage range (frente a NB2304AI1DG)
- Frequency rating (frente a NB2304AI1DG)
Notas de diseño
Route clock outputs as controlled-impedance traces with continuous reference planes and avoid uncontrolled stubs. The buffer should be placed near the clock branch point so that PCB propagation delay does not consume the downstream setup and hold budget. Maintain the 400 ps output-skew specification in the overall clock-tree analysis, including source jitter, trace-length mismatch, and return-path discontinuity. The manufacturer recommendation for exact topology and trace geometry must be checked before final layout.
Place the required input and output bypass capacitors at the pins according to the manufacturer application guidance, with short ground connections and minimal loop area. The verified operating range is 3 V to 3.6 V, but supply-current, capacitor-value, and ESR or ESR-compatible recommendations are not included in the supplied excerpts. Do not assume another PLL clock buffer has identical bypass requirements; confirm the target device's values and supply tolerances in the complete datasheet before releasing the schematic.
Do not treat the 133 MHz rating as a guarantee of usable timing at every load or board condition. Verify output loading, duty-cycle limits, input slew rate, jitter, temperature range, and supply tolerance for the exact operating mode. Also confirm the pinout from the manufacturer drawing because a generic SOIC-8 numbering assumption is unsafe. When substituting a candidate, compare the power pin locations and functional pins explicitly rather than relying only on the package outline.
Información de cumplimiento
The verified MK2304S-2LF specifications identify the SOIC-8 device as RoHS compliant. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations were supplied.