MK2745-24S - 160 MHz DVD/MPEG Clock Synthesizer | Renesas
Teilenummer: MK2745-24S ✓ AktivMK2745-24S Übersicht
A clock synthesizer is a timing IC that derives one or more internally related clock signals from a common reference. Clock generators, phase-locked loops, and frequency synthesizers form the broader clock and timing IC category. By coordinating audio, processor, and reference clocks in one device, the MK2745-24S reduces the number of separate oscillators required by DVD, MPEG-2, set-top, and related multimedia systems. Its bypass mode provides a direct clock path when PLL operation is not required.
Key features include a 27 MHz crystal or clock input, CMOS output technology, analog PLL operation with bypass, a maximum output frequency of 160 MHz, and an input-to-output ratio reaching 1:8. These characteristics suit designs that require multiple related clock domains while limiting board area. The single-circuit architecture is appropriate for centralized system timing rather than applications requiring numerous independent programmable outputs.
The device is intended for DVD and MPEG-2-based multimedia platforms where processor timing, audio clocks, and 27 MHz reference clocks must remain related. Its architecture can reduce clock-generation complexity by sharing a common reference across multiple outputs. Engineers should still evaluate each output's frequency, jitter, drive level, and operating condition against the complete system timing budget before releasing a production design.
Typical uses include DVD player clock trees, MPEG-2 set-top boxes, digital audio systems, processor clock generation, and multimedia equipment requiring 27 MHz references alongside derived audio or processor clocks. It may also be evaluated for legacy industrial and embedded video systems that use a 27 MHz source and CMOS-compatible clock inputs.
The primary design consideration is that the verified source excerpt does not identify the exact package, pin count, supply voltage, or complete output-frequency mapping. Those details must be confirmed in the Renesas MK2745-24 datasheet before schematic capture or PCB layout. The suffix and programming or packaging options should not be assumed equivalent unless the manufacturer data explicitly confirms them.
This page combines verified manufacturer and distributor information, pricing placeholders, drop-in-replacement verification status, and practical selection guidance. Unlike a raw distributor listing, it also identifies missing package and pinout data, distinguishes confirmed functions from unverified specifications, and explains where engineers must perform final datasheet validation.
Drop-in-Alternativen für MK2745-24S – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernMK2745-24S Technische Daten
| Product Type | Clock/frequency synthesizer |
| PLL | Yes, with bypass |
| PLL Technique | Analog phase-locked loop |
| Input Type | Clock input |
| Reference Input Frequency | 27 MHz |
| Ausgangstyp | CMOS |
| Maximum Frequency | 160 MHz |
| Number of Circuits | 1 circuit |
| Maximum Input-to-Output Ratio | 1:8 |
| Audio Output Clocks | Multiple outputs |
| Processor Clock | 1 processor clock output |
| 27 MHz Clock Outputs | 2 outputs |
| Primary Application | DVD and MPEG-2-based equipment |
MK2745-24S standard Pinbelegungsleitfaden
Pinbelegung für MK2745-24S (standard-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für MK2745-24S.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MK2745-24S ist geeignet für 6 Anwendungs: DVD Player Clock Tree, MPEG-2 Set-Top Box, Digital Audio System Timing, Legacy Multimedia Processor Clocking, MPEG-2 Embedded Media Equipment, Industrial Video and AV Control.
DVD Player Clock Tree
The MK2745-24S is well matched to a DVD player because it accepts the 27 MHz crystal or clock reference traditionally associated with DVD timing and generates multiple related outputs from one source. Its analog PLL with bypass supports synthesized and direct-clock operating paths, while the available clock set includes multiple audio clocks, a processor clock, and two 27 MHz outputs. This can simplify a legacy DVD clock architecture and reduce the number of independent oscillator circuits. The designer must still verify the exact output-divider settings, CMOS levels, jitter contribution, and package connections in the Renesas datasheet before finalizing the schematic.
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MPEG-2 Set-Top Box
A legacy MPEG-2 set-top box can use the MK2745-24S to centralize timing around a 27 MHz reference. The device produces a processor clock, multiple audio outputs, and two 27 MHz clocks, covering common multimedia clock-tree functions without requiring each subsystem to use an unrelated oscillator. Its maximum frequency of 160 MHz and 1:8 maximum ratio are the principal verified selection limits. Before adoption, the engineer should confirm output mapping, startup behavior, bypass requirements, supply voltage, and package pin compatibility against the complete system requirements.
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Digital Audio System Timing
The MK2745-24S is applicable to digital audio equipment that needs several clock signals derived from a common 27 MHz source. Multiple audio outputs allow related sample-rate-supporting clocks to be generated within one synthesizer, helping engineers organize a deterministic system timing tree. The processor clock and dual 27 MHz outputs may support surrounding controller or interface circuitry. Since the supplied excerpts do not state the output-frequency table or jitter limits, the actual audio design should be accepted only after checking every required frequency, edge-noise budget, load, and CMOS compatibility condition in the manufacturer documentation.
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Legacy Multimedia Processor Clocking
The MK2745-24S can support a processor clock in legacy DVD and MPEG-2 platforms while sharing its reference with audio and 27 MHz outputs. This consolidated arrangement may reduce clock-distribution complexity and provides PLL bypass when a direct reference path is preferable. The 160 MHz maximum output frequency covers the advertised upper operating point, but it does not by itself establish suitability for every processor operating frequency or timing margin. Firmware configuration, required divider ratios, reference startup time, and jitter tolerance must be evaluated against the processor interface specification.
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MPEG-2 Embedded Media Equipment
The MK2745-24S fits embedded MPEG-2 equipment designed around a 27 MHz timing reference and several dependent clock domains. Its one-circuit clock/frequency synthesizer architecture provides audio outputs, processor timing, and two 27 MHz outputs in a single device family, which is useful when board space and clock coordination are priorities. For industrial or embedded adaptations, verify the operating temperature grade, supply range, and lifecycle details because those values are not present in the verified excerpts. Any reused legacy board should also be checked for exact pin and package identity before substitution.
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Industrial Video and AV Control
The MK2745-24S can be evaluated for industrial video or AV-control equipment that retains a 27 MHz clock architecture and needs both processor and audio-related timing. Its low-cost positioning, analog PLL implementation, and bypass mode make it relevant to cost-sensitive legacy platforms rather than modern general-purpose clock trees. A robust implementation must verify CMOS input thresholds, output drive, noise, startup sequencing, and operating-temperature limits because the supplied data does not disclose them. For new safety- or reliability-critical systems, obtain complete electrical and qualification data before committing the design.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MK2745-24S – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Brand | Renesas Electronics |
| Product Type | Clock/frequency synthesizer |
| Maximum Frequency | 160 MHz |
| Reference Input | 27 MHz crystal or clock input |
| PLL | Yes, with bypass |
| PLL Technique | Analog phase-locked loop |
| Output Type | CMOS |
| Maximum Input-to-Output Ratio | 1:8 |
| Number of Circuits | 1 circuit |
| Generated Clock Functions | Multiple audio outputs, processor clock, and two 27 MHz clocks |
| Primary Application | DVD and MPEG-2-based equipment |
Wichtigste Unterscheidungsmerkmale
- One reference supports several multimedia clock functions (vs. 2305M-1T)
- Direct PLL bypass is available (vs. 2305M-1T)
- Purpose-built DVD and MPEG-2 clocking (vs. 2305M-1T)
Designhinweise
Do not treat the MK2745-24 family description as a complete specification for the MK2745-24S ordering code. The verified sources confirm the 27 MHz reference, analog PLL with bypass, 160 MHz maximum frequency, and intended DVD/MPEG-2 application, but they do not establish the suffix-specific package, temperature grade, supply range, or pinout. Confirm those details against the Renesas ordering information and complete datasheet before releasing schematic, PCB, or procurement documentation.
Keep the 27 MHz crystal or clock input and associated grounding and bypass layout according to the manufacturer's reference guidance. Because this device relies on a shared reference to produce audio, processor, and 27 MHz outputs, reference noise or unstable startup behavior can affect multiple downstream domains. Preserve short return paths, minimize loop area around clock-generation circuitry, and validate edge quality with an oscilloscope before system-level testing.
Validate each CMOS clock output against its actual receiver, load, routing length, and timing budget. The supplied excerpts confirm CMOS output technology but do not specify edge rate, output drive, jitter, or maximum load. Use scope measurements and receiver-specific timing analysis rather than assuming that every derived clock has the same signal-integrity margin as the 27 MHz reference.
Compliance-Informationen
The supplied verified data does not include explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for MK2745-24S. AEC-Q100 is shown as unknown rather than not_applicable because the component's exact qualification status was not provided.