MK2712S - 35.469MHz NTSC/PAL Clock Source | Renesas
料号： MK2712S ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MK2712S 概述
What is an NTSC/PAL clock source? It is a specialized clock and timing integrated circuit that supplies predictable video-system timing to encoder or decoder circuitry. NTSC and PAL are legacy analog video standards with different timing relationships, and compatible logic may require a stable reference rather than a general-purpose oscillator. Within the clock and timing hierarchy, the MK2712S belongs to the clock generator and frequency synthesizer class, supporting video clock generation within a broader timing-IC and semiconductor system.
The available verified information confirms one clock value, 35.469 MHz, and an 8-pin SOIC package with a stated width of 3.90 mm. A third-party technical result also states that the family stores two sets of popular frequencies for NTSC and PAL, allowing clock generation with fewer external components than a discrete implementation. This integration can reduce board area and component count when its fixed outputs match the target video circuitry. Supply voltage, current consumption, output waveform, frequency tolerance, and temperature range were not included in the supplied evidence and therefore remain unconfirmed here.
Architecturally, the device is presented as a dedicated clock source rather than a general-purpose phase-locked loop. Such fixed-function timing can simplify legacy video designs because engineers do not need to derive every standard-specific clock with separate dividers or oscillators. The exact selectable outputs, control method, and electrical timing characteristics must be confirmed in the Renesas MK2712 datasheet before layout or production release.
Typical uses include NTSC video encoders, PAL video encoders, NTSC decoders, PAL decoders, industrial video equipment, broadcast-interface circuitry, and legacy video test systems. It is most appropriate where the downstream circuitry specifically expects the supported MK2712 clock outputs and where an 8-pin SOIC footprint fits the existing mechanical constraints.
A key design practice is to follow the manufacturer reference connection and pin definitions exactly. Confirm signal levels, decoupling, exposed routing requirements if any, output availability, and timing margins against the official MK2712 datasheet before substitution. Because the supplied evidence does not establish an electrically interchangeable modern replacement, any alternate part should be treated as a new design until its pinout and output behavior are verified.
MK2712S 规格参数
| Product Type | NTSC/PAL clock source |
| Product Classification | Clock synthesizer / video IC |
| Listed Clock Frequency | 35.469 MHz |
| Supported Video Standards | NTSC and PAL |
| Intended Functions | Video encoder and decoder clock generation |
| Stored Frequency Sets | Two sets of popular NTSC and PAL frequencies |
| Package Type | 8-pin SOIC |
| Package Width | 3.90 mm |
| 安装类型 | Surface mount |
| RoHS 状态 | unknown |
| REACH Status | unknown |
MK2712S 3.90 mm 引脚配置指南
MK2712S（3.90 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MK2712S.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MK2712S 适用于 8 应用s: NTSC Video Encoder Clocking, PAL Video Encoder Clocking, NTSC Video Decoder Interface, PAL Video Decoder Interface, Industrial Video Test Equipment, Broadcast and Studio Support Electronics, Legacy Video Encoder Repair, Video Clock Reference Subcircuit.
NTSC Video Encoder Clocking
The MK2712S fits an NTSC encoder that requires a dedicated standard-related clock source rather than a general-purpose synthesizer. Its confirmed purpose is clock generation for NTSC video encoder and decoder circuitry, and the verified data identifies 35.469 MHz as its listed operating frequency. Integrating stored NTSC/PAL frequencies can reduce the number of discrete timing components and simplify board-space planning. Before final schematic release, verify that 35.469 MHz corresponds to the encoder clock actually required and confirm the selected output, supply, and logic levels from the Renesas datasheet.
PAL Video Encoder Clocking
The MK2712S is applicable to PAL encoder electronics because the verified technical description states that it stores popular frequencies for NTSC and PAL video systems. The dedicated 8-pin SOIC implementation can replace a collection of discrete oscillators or divider networks when the downstream device expects the MK2712 waveform and frequency plan. Integration helps reduce component count, but it does not eliminate design checks. Confirm the PAL clock assignment, output polarity, loading, supply voltage, and timing relationship in the official MK2712 documentation before fabrication.
NTSC Video Decoder Interface
An NTSC decoder can use the MK2712S when its internal timing requires the standard-related clock supplied by this family. The verified manufacturer and distributor descriptions explicitly place the device in video clock generation for encoders and decoders, while the listed 35.469 MHz frequency provides a concrete initial selection point. Using a dedicated clock source may make signal timing easier to control than assembling separate frequency-generation blocks. Validate the decoder’s required edge position, logic threshold, output drive, and allowable jitter against the complete datasheet before substituting or integrating it.
PAL Video Decoder Interface
The MK2712S is suitable for a PAL decoder designed around the MK2712 family’s stored PAL frequency set. Its dedicated 35.469 MHz-class timing role can provide a stable reference without implementing a programmable general-purpose clock generator. The 8-pin SOIC package also supports compact, conventional surface-mount layouts. The decisive design requirement is functional equivalence: the clock must match the decoder’s expected frequency, edge relationship, amplitude, and loading. Those details were not present in the supplied data and must be obtained from Renesas before release.
Industrial Video Test Equipment
Industrial video test equipment can benefit from MK2712S timing when it must stimulate or analyze NTSC/PAL-compatible signal chains. A dedicated NTSC/PAL clock source can reduce board count compared with a multi-oscillator implementation and provides a purpose-built frequency set for legacy video checks. The listed 35.469 MHz value should be treated as a verified identification point, not the complete output specification. Confirm selectable modes, jitter, startup behavior, and output timing from the datasheet, then measure the clock at the load to verify signal integrity.
Broadcast and Studio Support Electronics
The MK2712S may be used in legacy broadcast support electronics where an NTSC/PAL-compatible encoder, decoder, or synchronization block needs a deterministic clock. Its dedicated frequency functionality can simplify maintenance boards and specialized interfaces that do not justify a programmable PLL. Because this device is tied to legacy video standards rather than general video standards, engineers should first confirm the exact interface clock requirement. Supply-noise tolerance, output loading, and board-level clock integrity must also be evaluated because those parameters were not included in the verified excerpts.
Legacy Video Encoder Repair
The MK2712S is directly relevant to repair and modernization of boards containing a failed dedicated NTSC/PAL clock source. Matching the original MPN and package permits a targeted replacement in legacy encoder or decoder equipment, subject to authenticity and solder-process requirements. The verified DigiKey listing identifies the device as available from a distributor, while the manufacturer datasheet supplies technical documentation. Before installation, inspect the failed board for damaged package pads and confirm that replacement sourcing includes appropriate traceability.
Video Clock Reference Subcircuit
The MK2712S can serve as a fixed video clock reference within a larger analog or mixed-signal timing subsystem. Integrating stored NTSC/PAL frequencies reduces the number of separate oscillator and divider blocks when those standards are the only required outputs. The listed 35.469 MHz operation should be compared with the receiving circuit’s tolerance and edge requirements, while the confirmed 8-pin SOIC simplifies mechanical planning. Do not generalize the part into arbitrary RF, processor, or communications timing uses without an explicit frequency and waveform requirement.
工程参考数据： MK2712S ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 8-pin SOIC, 3.90 mm width |
| Brand | Renesas Electronics |
| Product Type | NTSC/PAL clock source |
| Listed Operating Frequency | 35.469 MHz |
| Supported Video Standards | NTSC and PAL |
| Frequency Sets | Two sets of popular NTSC and PAL frequencies |
| Primary Functions | Video encoder and decoder clock generation |
| Drop-In Replacement Status | No verified replacement in supplied cross-reference data |
关键差异点
- Dedicated NTSC/PAL clock-source positioning （对比 General-purpose clock generators)
- Compact dedicated implementation （对比 Discrete oscillator and divider networks)
- Confirmed listed frequency （对比 MK2761ASLFTR)
设计说明
Route the MK2712S clock output as a short, controlled trace from the SOIC to the receiving timing circuit. The verified material confirms the package and purpose but not output drive, edge rate, or load limits; therefore, avoid long stub branches and unnecessary test-point loading. Before layout release, obtain the complete Renesas pinout and application circuit, then preserve the manufacturer-recommended grounding and decoupling arrangement.
Validate the clock at the actual load rather than assuming the listed 35.469 MHz value alone guarantees acceptable operation. Measure rising and falling edges, duty behavior, amplitude, jitter, and receiver thresholds using an appropriate probe and bandwidth. The supplied evidence does not include waveform or timing specifications, so these acceptance limits must be derived from the MK2712 datasheet and the receiving encoder or decoder requirements.
Do not treat MK2761ASLFTR as a drop-in substitute merely because a comparison page lists it. The supplied search evidence establishes no common 8-pin pinout, matching NTSC/PAL outputs, supply range, or timing behavior. A valid replacement requires footprint, pin-function, clock-output, logic-level, electrical-limit, and lifecycle equivalence; otherwise the change requires schematic and PCB review.
Use the manufacturer-recommended supply and decoupling arrangement once those values are obtained from the official datasheet. Supply voltage, current consumption, and decoupling values were not included in the verified excerpts and have not been inferred. Place required bypass components close to their designated pins, maintain a low-impedance return path, and verify that neighboring video circuitry does not inject unacceptable noise onto the clock rail.
合规信息
The supplied verified results do not contain explicit compliance declarations for the MK2712S. No compliance or automotive qualification status has been assumed.