MK2771-15RTR - 100MHz VCXO Clock Synthesizer | Renesas (Tape & Reel)
MPN: MK2771-15RTR ✓ সক্রিয়MK2771-15RTR সারাংশ
A VCXO is a crystal oscillator whose frequency can be adjusted with an external control voltage. It belongs to the clock oscillator and timing-control hierarchy, where a stable crystal reference is combined with voltage-controlled tuning to compensate for reference-clock errors. A clock synthesizer performs the related function of generating or distributing multiple timing signals. The MK2771-15RTR integrates these concepts for consumer set-top equipment where adjustable, low-jitter timing is useful without requiring a high-cost external frequency-control solution.
Key features include a maximum clock frequency of 100 MHz, a VCXO tuning range of ±100 ppm, a 0 V to 3 V control-voltage range, low-cost implementation, and low-jitter operation. The CMOS output architecture is suitable for digital logic in set-top boxes, while the 1:8 ratio provides a defined relationship between the crystal input and synthesized output. These characteristics make the device relevant to designs requiring a tunable reference clock rather than a completely fixed-frequency oscillator.
Technically, the MK2771-15RTR combines a crystal-based oscillator, voltage-controlled frequency adjustment, and clock-synthesis functions on one integrated circuit. The control voltage applied to the VCXO changes the output frequency around the crystal-defined nominal condition. Its single-circuit implementation simplifies PCB requirements compared with a discrete crystal oscillator plus separate synthesizer. The available data specifies CMOS outputs, a crystal input, and single-ended rather than differential signaling, so downstream circuitry must be designed for the corresponding signal format.
Typical uses include set-top box main timing, tuner and video-processing clock distribution, MPEG transport-stream interface clocking, and other consumer television equipment requiring a tunable low-jitter clock source. The device can also serve as a dedicated timing IC in designs where its 100 MHz ceiling and ±100 ppm adjustment capability satisfy the system clock requirements.
Designers should verify the exact crystal frequency, loop filtering, output enable behavior, decoupling requirements, and output-drive configuration against the manufacturer datasheet before layout release. The 28-QSOP footprint requires a compact surface-mount layout, while the single-ended CMOS outputs require controlled routing and return paths to minimize clock-edge degradation.
This page consolidates the verified manufacturer and distributor information, distinguishes documented parameters from unavailable details, and provides application guidance, purchasing context, and design cautions without presenting unverified specifications as fact.
এর জন্য ড্রপ-ইন বিকল্প MK2771-15RTR — একই package, pin-to-pin compatible। ভিন্ন package-এর যেসব পার্টে PCB rework প্রয়োজন সেগুলো বাদ দেওয়া হয়েছে।
এই পণ্যের জন্য কোনো ড্রপ-ইন বিকল্প পাওয়া যায়নি।
বিকল্প অনুরোধ করুনMK2771-15RTR বিশেষণ
| Product Type | VCXO and clock synthesizer |
| Primary Application | Set-top boxes |
| Maximum Output Frequency | 100 MHz |
| VCXO Control Voltage Range | 0 V to 3 V |
| Frequency Tuning Range | ±100 ppm |
| Output Logic | CMOS |
| Clock Input | Crystal |
| PLL | Yes |
| Number of Circuits | 1 circuit |
| Input-to-Output Ratio | 1:8 |
| Differential Input | No |
| Differential Output | No |
| প্যাকেজ | 28-QSOP, 0.154 inch (3.90 mm) width |
| Jitter | Low |
| Cost Position | Low-cost device |
MK2771-15RTR 28-qsop, 0.154 inch (3.90 mm) width পিন কনফিগারেশন গাইড
MK2771-15RTR (28-qsop, 0.154 inch (3.90 mm) width প্যাকেজ)-এর পিন কনফিগারেশন। পিন নম্বরিং, ফাংশন এবং সংযোগ ডায়াগ্রাম প্রস্তুতকারকের ডেটাশিটে সংজ্ঞায়িত করা আছে। সঠিক ফুটপ্রিন্ট এবং সোল্ডারিং নির্দেশিকার জন্য এটি দেখুন।
এর জন্য বিস্তারিত পিনআউট ডেটা পাওয়া যায়নি MK2771-15RTR.
দেখুন ডেটাশিট সম্পূর্ণ পিন কনফিগারেশনের জন্য।
সাধারণ ব্যবহার
MK2771-15RTR এর জন্য উপযুক্ত 6 অ্যাপ্লিকেশনs: Set-Top Box Main Clock, Tuner and Demodulator Timing, MPEG Transport-Stream Clocking, Consumer Video Processing, Low-Cost Tunable Clock Reference, Digital Television Receiver Timing.
Set-Top Box Main Clock
The MK2771-15RTR is specifically designed for set-top boxes and combines a voltage-controlled crystal oscillator with clock synthesis in one 28-QSOP IC. Its maximum output frequency of 100 MHz and ±100 ppm tuning range suit systems that need a reference clock capable of limited adjustment. The device generates single-ended CMOS clock outputs, reduces the need for a discrete oscillator and separate synthesis stage, and supports a 1:8 input-to-output ratio. Designers must select the crystal and PLL settings according to the manufacturer guidance, while controlling return paths and output loading to preserve jitter performance.
সুপারিশকৃত
Tuner and Demodulator Timing
The MK2771-15RTR can supply a tunable CMOS timing reference to tuner, demodulator, and transport-stream processing sections of a set-top box. Its 0 V to 3 V VCXO control input permits up to ±100 ppm clock adjustment, which is useful when correcting small reference offsets without changing the crystal itself. The 100 MHz maximum frequency provides headroom for common digital video-processing clock domains. Integration reduces component count, but the clock architecture and PLL settings must be validated against the receiver subsystem’s sampling requirements and jitter tolerance.
সুপারিশকৃত
MPEG Transport-Stream Clocking
The MK2771-15RTR is applicable as a system clock source for MPEG transport-stream processing, where consistent digital timing supports serialized data transfer and synchronization. Its integrated VCXO and clock synthesizer provide a single-ended CMOS output with a documented maximum frequency of 100 MHz and a 1:8 input-to-output ratio. Using the IC can simplify the clock tree compared with separate oscillator and synthesis components. The actual transport-stream interface should be evaluated for required frequency, jitter, and PLL-loop bandwidth, and the control voltage must be filtered to avoid unwanted modulation.
সুপারিশকৃত
Consumer Video Processing
The MK2771-15RTR can serve as a reference clock for consumer television and video-processing electronics that operate from a crystal-defined source but benefit from voltage adjustment. Its 100 MHz ceiling, PLL capability, and ±100 ppm tuning range offer more flexibility than a fixed oscillator while maintaining a low-cost integration approach. The CMOS output is compatible with conventional digital timing distribution when signal integrity is managed correctly. Designers should confirm whether the target video IC expects a specific clock multiple, edge polarity, and jitter level before committing the circuit.
সুপারিশকৃত
Low-Cost Tunable Clock Reference
The MK2771-15RTR is useful where modest frequency adjustment is needed but a high-cost programmable clock source would be excessive. Applying a control voltage from 0 V to 3 V changes the output by up to ±100 ppm, allowing small system-level corrections while the crystal maintains the nominal reference. The integrated PLL and clock synthesizer provide additional timing functions in the same 28-QSOP device. This approach is most appropriate when the required tuning range is narrow and the control signal can be kept clean, because voltage noise or poor filtering may degrade the resulting clock quality.
সুপারিশকৃত
Digital Television Receiver Timing
The MK2771-15RTR was developed for set-top-box environments and can provide the system timing reference used by digital television receiver chains. Its low-jitter VCXO architecture, 100 MHz maximum output, and 0 V to 3 V tuning control are appropriate for systems requiring a stable but adjustable clock source. The single-ended CMOS output makes it usable with compatible digital logic, provided the PCB layout maintains short return paths and controlled impedance. Receiver designers should verify jitter against the demodulator and video timing specifications rather than relying only on frequency accuracy.
সুপারিশকৃত
এর জন্য ইঞ্জিনিয়ারিং রেফারেন্স ডেটা MK2771-15RTR — তুলনা, ডিজাইন গাইডেন্স এবং কমপ্লায়েন্স তথ্য।
নির্বাচন গাইড
বিকল্পের সাথে তুলনা
| পারামিটার | এই পণ্য |
|---|---|
| Package | 28-QSOP, 0.154 inch (3.90 mm) width |
| Brand | Renesas Electronics |
| Product Type | VCXO and clock synthesizer |
| Maximum Output Frequency | 100 MHz |
| VCXO Control Voltage Range | 0 V to 3 V |
| Frequency Tuning Range | ±100 ppm |
| Output Logic | CMOS |
| Clock Input | Crystal |
| Input-to-Output Ratio | 1:8 |
| PLL | Yes |
মূল পার্থক্যসমূহ
- Integrated voltage adjustment and clock synthesis (বনামFixed-frequency crystal oscillator)
- Designed specifically for set-top-box timing (বনামGeneral-purpose clock oscillator)
- Single-chip clock-tree simplification (বনামDiscrete crystal oscillator plus external synthesizer)
ডিজাইন নোট
Place the crystal, associated load components, and device clock pins using the manufacturer’s reference layout. The available evidence confirms a 28-QSOP package and crystal input but does not provide a verified pin map, so the complete datasheet must be consulted before routing. Keep clock traces short, provide a continuous ground reference, and avoid routing the sensitive crystal node beneath digital or switching-clock traces to reduce pickup and phase-noise conversion.
The verified 0 V to 3 V specification applies to the VCXO control input and must not be mistaken for the complete device supply-voltage range. Use the manufacturer’s recommended supply, decoupling, and control-voltage circuit values. In particular, filter the VCXO control voltage when it originates from a DAC or digitally controlled source, because control-signal noise can modulate clock frequency and degrade jitter. The required supply-voltage and decoupling values remain unavailable in the supplied data.
Route each single-ended CMOS clock output with a continuous reference plane, minimize stub lengths, and match the receiver’s input expectations. The verified specifications identify CMOS outputs but do not provide drive strength, rise time, or capacitive-load limits. Confirm those electrical characteristics in the datasheet before assuming a particular trace length or topology, and evaluate edge degradation at the 100 MHz maximum output frequency rather than only at the nominal operating point.
Do not treat the ±100 ppm VCXO range as a general-purpose PLL programming range, and do not substitute a suffix variant without verifying pin compatibility. The cross-reference results identify MK2771-15RTRLF as physically related to the family but do not establish equivalence. Validate crystal frequency, PLL ratio, control polarity, output configuration, and lifecycle status. A clock oscillator that powers incorrectly can prevent system start-up even when basic output frequency measurements appear correct.
কমপ্লায়েন্স তথ্য
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance. AEC-Q100 is treated as not applicable because this is a set-top-box clock-generation IC rather than an automotive-qualified device.
