MK2761AS - 27MHz Multi-Output Clock Synthesizer | Renesas
N.º de pieza: MK2761AS ✗ Fin de vida| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MK2761AS Descripción general
A clock synthesizer is a clock-and-timing integrated circuit that derives one or more stable digital timing signals from a reference oscillator. Clock generation belongs to the oscillator, frequency synthesis, clock management, and timing IC hierarchy before connecting to broader clock-and-timing and semiconductor systems. In consumer equipment, a synthesizer can distribute related reference-derived clocks while reducing the number of separate oscillators required.
The MK2761AS supports a maximum frequency of 27MHz and accepts either a crystal or external clock. Its CMOS outputs suit digital logic that requires repeatable clock edges, while the PLL-bypass path provides flexibility when the design must use or pass through the reference clock. The 16-pin SOIC package is a surface-mount option compatible with conventional PCB assembly and inspection processes.
This device is specifically described for set-top box clock generation, where digital video, audio, control, and interface circuitry may require coordinated timing. It can also be evaluated for other consumer or embedded systems that use a 27MHz reference and need several derived clocks, provided each output frequency, duty cycle, timing level, and load requirement is confirmed against the manufacturer datasheet.
The principal design task is verifying the complete output-frequency plan and external crystal or clock network. Board placement should minimize clock routing length and noise pickup, while output loading and trace capacitance should match the device’s stated drive and timing requirements. Because only summary specifications were provided here, voltage ranges, current limits, jitter, output counts, pin functions, and exact frequency ratios require confirmation before release to production.
This product record consolidates verified distributor information, package identification, functional characteristics, design cautions, and commercial availability. It also separates confirmed facts from missing datasheet parameters, helping engineers evaluate the MK2761AS for new designs, replacements, and set-top box clock-distribution requirements without assuming unverified specifications.
Alternativas directas para MK2761AS — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
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No hay alternativas directas disponibles para este producto.
Solicitar alternativasMK2761AS Especificaciones
| Product Type | Clock/Frequency Synthesizer IC |
| Maximum Frequency | 27 MHz |
| PLL | Yes, with bypass |
| Input Type | Clock or crystal |
| Tipo de salida | CMOS |
| Number of Circuits | 1 |
| Encapsulado | 16-pin SOIC |
| Package Width | 0.154 in (3.90 mm) |
| Primary Application | Set-top box clock generation |
| Clock Architecture | Analog phase-locked loop |
| Output Function | Multiple output clock generation |
| Reference Input | 27 MHz crystal or clock input |
Guía de configuración de pines de MK2761AS 0.154 in (3.90 mm)
Configuración de pines para MK2761AS (encapsulado 0.154 in (3.90 mm)). 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 MK2761AS.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MK2761AS es adecuado para 6 aplicacións: Set-Top Box Master Clock, Digital Video Timing Distribution, Consumer Audio Equipment Clocking, Consumer Network Device Timing, Embedded Consumer Controller Timing, Clock Reference Test Fixture.
Set-Top Box Master Clock
The MK2761AS fits a set-top box master-clock role because its verified architecture accepts a 27 MHz crystal or clock reference and generates multiple CMOS outputs. It can provide related timing domains to digital video, audio, control, and interface sections without requiring a separate oscillator for every clock requirement. The analog PLL and bypass feature also give the design a potential startup or test path. Before schematic approval, verify every required frequency, duty cycle, load, and sequencing condition from the manufacturer datasheet, because those detailed values are not present in the verified snippets.
Digital Video Timing Distribution
MK2761AS is suitable for evaluating a reference-derived timing network inside a digital video subsystem, provided the required clock frequencies match the device’s verified 27 MHz input and synthesis architecture. CMOS outputs can feed compatible digital logic, while the PLL-based structure is intended to produce coordinated clocks from one reference. The main design issue is timing integrity rather than raw package size: route outputs over controlled impedances, keep clocks away from switching nodes, and validate jitter and duty-cycle margins on the assembled board before production release.
Consumer Audio Equipment Clocking
The MK2761AS can be considered for consumer audio equipment when multiple CMOS clocks must be derived from a common 27 MHz reference. A single synthesized timing source may simplify the design and reduce dependence on multiple independent oscillators, while PLL bypass can support controlled initialization or test strategies. Its suitability depends on whether the required audio-processing, control, and interface clocks fall within the device’s output plan. The verified data does not state output counts, frequency ratios, or jitter limits, so those details must be validated before release.
Consumer Network Device Timing
Within a consumer networking product, MK2761AS may provide coordinated timing for embedded control and interface blocks that accept compatible CMOS clocks. The verified 27 MHz reference, analog PLL, bypass mode, and multiple-output capability make it relevant to a shared clock tree, but no specific Ethernet, wireless, or memory-interface suitability has been verified. Engineers should map each destination circuit’s required frequency, rise/fall limits, duty cycle, and current demand to the manufacturer output table before selecting the device.
Embedded Consumer Controller Timing
MK2761AS can serve as a candidate clock source for embedded consumer controllers requiring a stable reference and several derived CMOS clocks. Centralized generation can reduce oscillator-component count and provide a common timing reference, but the controller’s exact input requirements must be compared with the complete MK2761AS output plan. The 16-pin SOIC package supports conventional surface-mount assembly, although routing density and exposed-ground requirements still depend on the authoritative pinout and package documentation.
Clock Reference Test Fixture
The MK2761AS is relevant to a clock-generation test fixture because PLL bypass permits comparison of reference and synthesized operating paths, while multiple CMOS outputs can exercise several downstream clock consumers. A fixture can use controlled loads and measurement equipment to check frequency, duty cycle, startup behavior, and output integrity. This use remains conditional on obtaining the authoritative frequency table and pin map. Do not power or operate the fixture until supply voltage, absolute maximum ratings, and pin-specific functions are confirmed.
Datos de referencia de ingeniería para MK2761AS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Package | 16-pin SOIC (0.154 in, 3.90 mm width) |
| Brand | Renesas Electronics |
| Product Type | Clock/Frequency Synthesizer IC |
| Maximum Frequency | 27 MHz |
| PLL | Yes, with bypass |
| Input | Clock or crystal |
| Output Type | CMOS |
| Number of Circuits | 1 |
| Application | Set-top box clock generation |
Diferenciadores clave
- Purpose-built synthesis rather than a single fixed-frequency oscillator (frente a No verified alternate MPN was found)
- Set-top box-specific clock-generation role (frente a No verified alternate MPN was found)
- Selectable reference and PLL clock paths (frente a No verified alternate MPN was found)
Notas de diseño
Keep the 27 MHz crystal or reference-clock path compact and follow the manufacturer’s recommended grounding and load-capacitance topology. Place any programmable or tuning elements where their values are stable, and route oscillator nodes away from switching regulators, high-current returns, and digital clock edges. The verified snippets do not provide the crystal load capacitance or recommended PCB geometry, so do not invent those values; obtain them from the authoritative package and application guidance before layout release.
Treat every CMOS clock output as a high-speed signal even though the maximum verified frequency is only 27 MHz. Use short branches, continuous reference planes, avoided stubs, and termination appropriate to the destination input and edge rate. Confirm rise/fall-time limits and load capacitance from the full datasheet before selecting resistor values. Validate each output with an oscilloscope for frequency, duty cycle, ringing, and startup behavior across temperature and supply corners.
Do not substitute an apparently similar 16-SOIC clock synthesizer solely from package shape. Confirm pin names, supply rails, crystal connection, PLL-bypass logic, output frequencies, output levels, and timing specifications. PLL bypass changes the clock path and may create sequencing constraints, so test both operating modes. The supplied verified data lacks the complete pinout and frequency table, making schematic completion or a guaranteed replacement decision unsafe until the manufacturer documentation is reviewed.
Información de cumplimiento
The verified web results do not provide explicit compliance declarations for MK2761AS. Compliance fields remain unknown rather than inferred.
