MK2772-01STR - VCXO and Set-Top Clock Source | Renesas (Tape & Reel)
MPN: MK2772-01STR ✗ जीवन की समाप्तिMK2772-01STR अवलोकन
A VCXO, or voltage-controlled crystal oscillator, is a crystal oscillator whose frequency can be adjusted by an external voltage. The MK2772-01STR combines this oscillator with an analog phase-locked loop and clock synthesis functions in one clock-and-timing IC. This integration supports set-top box designs that require a stable reference frequency plus one or more derived system clocks without implementing a complete discrete oscillator and PLL subsystem.
The principal features include a 13.5 MHz crystal input, a 0 V to 3 V VCXO tuning-control range, approximately plus or minus 100 ppm frequency adjustment, CMOS output technology, and operation from a 4.75 V supply as reported in the verified product data. The integrated PLL includes bypass capability, providing a practical path for system bring-up, test, or clock-source fallback. The 20-SOIC package supports conventional surface-mount PCB assembly.
Technically, the device uses MicroClock VCXO and analog PLL techniques to derive clocks from an economical crystal. The tuning voltage provides coarse frequency control where the target equipment needs calibration across cable, tuner, or network synchronization requirements. Because the device is identified as obsolete in verified component listings, engineers should avoid new designs and evaluate current-generation clock generators when creating a new board.
Typical uses include legacy set-top box main boards, digital video broadcast receivers, and embedded video equipment requiring a stable 13.5 MHz reference with synthesized CMOS clocks. The component may also appear in industrial or communications equipment designed around the same legacy clock architecture, provided its electrical limits, timing margins, and operating-temperature requirements are verified.
Design engineers must confirm the complete pinout, crystal load requirement, output enable behavior, control-voltage polarity, and output-drive configuration against the Renesas datasheet before layout or replacement work. Because the component is obsolete, a mechanically similar clock IC is not automatically a safe replacement: its pinout, supply voltage, PLL architecture, tuning range, and output standards must match.
This page consolidates the verified manufacturer and distributor information, lifecycle warning, pricing evidence, candidate replacements, comparison parameters, and practical design cautions for engineers evaluating the MK2772-01STR or a legacy-board repair.
के लिए ड्रॉप-इन विकल्प MK2772-01STR — समान पैकेज, पिन-टू-पिन संगत। PCB रीवर्क आवश्यक करने वाले भिन्न-पैकेज पार्ट्स शामिल नहीं हैं।
8725AM-21LFT
✅ ड्रॉप-इन📋 संदर्भ विकल्प (कैटलॉग में नहीं)
8725AM-21LF
✅ ड्रॉप-इन📋 संदर्भ विकल्प (कैटलॉग में नहीं)
MK2772-01STR विशेषताएं
| Product Type | VCXO and set-top clock source |
| Clock Generator Type | Clock synthesizer, VCXO |
| PLL | Yes, with bypass |
| Number of Circuits | 1 circuit |
| Crystal Input Frequency | 13.5 MHz |
| VCXO Control Voltage | 0 V to 3 V |
| Frequency Adjustment Range | Plus or minus 100 ppm |
| Maximum Output Frequency | 27 MHz |
| आउटपुट प्रकार | CMOS |
| Input Type | Crystal |
| ऑपरेटिंग सप्लाई वोल्टेज | 4.75 V minimum |
| ऑपरेटिंग तापमान रेंज | 0 C to 70 C |
| पैकेज | 20-SOIC |
| माउंटिंग प्रकार | Surface-mount SMD |
| Lead-Free Status | Pb-free |
MK2772-01STR 20-soic पिन कॉन्फ़िगरेशन गाइड
MK2772-01STR (20-soic पैकेज) के लिए पिन कॉन्फ़िगरेशन। पिन नंबरिंग, फ़ंक्शन और कनेक्शन आरेख निर्माता डेटाशीट में परिभाषित हैं। सटीक फुटप्रिंट और सोल्डरिंग दिशानिर्देशों के लिए इसे देखें।
इसके लिए कोई विस्तृत pinout data उपलब्ध नहीं: MK2772-01STR.
देखें डेटाशीट पूर्ण पिन कॉन्फ़िगरेशन के लिए।
सामान्य अनुप्रयोग
MK2772-01STR के लिए उपयुक्त है 6 अनुप्रयोगs: Legacy Set-Top Box Clocking, Digital Video Broadcast Receiver, Cable and Tuner Synchronization, Video Processing Equipment, Industrial Video Control Systems, Legacy Communication Equipment Repair.
Legacy Set-Top Box Clocking
The MK2772-01STR is specifically identified as a VCXO and set-top clock source, making it suitable for maintenance of legacy set-top main boards that use a 13.5 MHz crystal reference. Its 0 V to 3 V tuning input can vary the generated clock by approximately plus or minus 100 ppm, allowing board-level adjustment when the tuner, demodulator, or downstream synchronization requires calibration. The integrated analog PLL and bypass mode simplify clock architecture, although the obsolete lifecycle status requires careful sourcing and full pinout verification before reuse.
अनुशंसित
Digital Video Broadcast Receiver
A digital video broadcast receiver can use the MK2772-01STR as the system timing reference when its original design uses a 13.5 MHz crystal and a voltage-tuned clocking scheme. The component supplies CMOS clocks with a verified maximum frequency of 27 MHz and offers PLL bypass for diagnostic or fallback operation. Because set-top designs are highly integrated, engineers must preserve the original crystal load, tuning polarity, output-routing assignments, and supply sequencing rather than assuming that any 20-SOIC clock generator is interchangeable.
अनुशंसित
Cable and Tuner Synchronization
The MK2772-01STR can support synchronization in legacy cable receiver and tuner systems that require a voltage-adjustable clock reference. Its documented 0 V to 3 V VCXO control range provides approximately plus or minus 100 ppm frequency variation, which is useful when correcting small reference offsets without replacing the crystal. The design must compensate the tuning voltage in hardware and preserve the device's specified PLL behavior; modern systems may require tighter tuning accuracy or lower jitter than this legacy oscillator provides.
अनुशंसित
Video Processing Equipment
The MK2772-01STR can be used in legacy video-processing electronics where multiple CMOS clocks must be derived from one 13.5 MHz crystal. Its clock-synthesizer architecture reduces the component count associated with separate oscillator and divider networks, while PLL bypass provides a route for board test or clock fallback. Integration still requires checking CMOS load capacitance, output-enable states, frequency-plan margins, and the exact pin assignments against the manufacturer datasheet, particularly because complete pin details were absent from the supplied excerpts.
अनुशंसित
Industrial Video Control Systems
A legacy industrial video controller can use the MK2772-01STR when it requires an adjustable reference clock rather than a fixed crystal oscillator. The verified operating-temperature range of 0 C to 70 C is suitable for many indoor commercial systems but not extended industrial environments. Its 4.75 V minimum supply requirement and up-to-27 MHz CMOS output also make the original schematic, regulator headroom, and downstream devices essential parts of the qualification review before substitution.
अनुशंसित
Legacy Communication Equipment Repair
The MK2772-01STR is applicable to targeted repair of communication equipment that originally used its 13.5 MHz crystal, VCXO tuning input, and PLL-based clock outputs. Repair teams can use the documented plus or minus 100 ppm adjustment range and PLL bypass capability to isolate oscillator and synthesizer behavior during troubleshooting. Replacement approval should remain conditional because only two same-package candidates were surfaced, and neither excerpt demonstrates a complete pin-to-pin match to the original VCXO function.
अनुशंसित
अनुशंसित उत्पादों का सारांश
के लिए इंजीनियरिंग संदर्भ डेटा MK2772-01STR — तुलना, डिज़ाइन मार्गदर्शन और अनुपालन जानकारी।
चयन गाइड
विकल्पों के साथ तुलना
| पैरामीटर | यह उत्पाद | 8725AM-21LFT | 8725AM-21LF |
|---|---|---|---|
| Brand | Renesas Electronics | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC | 20-SOIC |
| Primary Function | VCXO and set-top clock source | Zero-delay HSTL clock generator | Zero-delay HSTL clock generator |
| Output Type | CMOS | HSTL | HSTL |
मुख्य विशेषताएँ
- Native VCXO tuning for legacy set-top clocking (बनाम8725AM-21LFT)
- Integrated PLL bypass in the target architecture (बनाम8725AM-21LF)
- Purpose-built 13.5 MHz set-top reference architecture (बनाम8725AM-21LFT)
डिज़ाइन नोट्स
Do not treat a shared 20-SOIC package as proof of drop-in compatibility. The verified excerpts describe the MK2772-01STR as a VCXO and set-top clock source with a 13.5 MHz crystal input and 0 V to 3 V tuning control, while the 8725AM-21LFT and 8725AM-21LF are described as zero-delay HSTL clock generators. Before substituting either candidate, compare every power pin, crystal connection, control input, PLL configuration, output enable, output divider, and no-connect position against the original and candidate manufacturer datasheets.
Preserve the original crystal loop placement and ground-return geometry during repair. A 13.5 MHz reference is susceptible to unwanted feedback if oscillator traces are long, adjacent to noisy switching nodes, or routed over discontinuous plane boundaries. Keep the crystal and decoupling connections compact, maintain a quiet return path, and reproduce the manufacturer's recommended component values and grounding arrangement. If the original board uses an active low-level probe near the oscillator, account for its capacitance during fault diagnosis.
Verify the original output standard and receiver thresholds before assigning CMOS outputs directly to HSTL or other legacy clock inputs. Although the supplied listing identifies the MK2772-01STR output as CMOS, the replacement candidates are identified as HSTL devices. Voltage swing, crossing-point behavior, capacitive loading, termination, and downstream input thresholds can affect timing even when the package and nominal frequency match. Measure the actual clock amplitude and edges at the destination IC rather than relying only on a schematic label.
The verified operating-supply information specifies 4.75 V as the minimum supply, so do not reuse a 3.3 V-only clock architecture without confirming every pin and internal rail requirement. Maintain the original regulator's startup, bypass-capacitor, and load-transient behavior, and observe the specified 0 C to 70 C operating range. Because this part is obsolete, obtain a genuine device with traceable lot information rather than assuming any assembly with the same marking is electrically identical.
अनुपालन जानकारी
The Renesas search excerpt describes the MK2772-01 family as Pb-free. The supplied data does not explicitly state RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 status, so those fields remain unknown or not applicable rather than assumed.
