MK2772-01SLF VCXO Clock Source | Renesas Electronics
MPN: MK2772-01SLF ✓ פעילMK2772-01SLF סקירה
A VCXO is a crystal oscillator whose output frequency can be adjusted with an external control voltage. The MK2772-01SLF combines that tuning mechanism with clock synthesis, placing it in the clock generator and timing IC hierarchy. This allows a system to correct clock frequency against a reference or implement fine phase and frequency adjustments without replacing the crystal. The device is intended primarily for set-top boxes and other systems requiring a controlled low-jitter clock source.
The main functional characteristics include 5 V operation, a 13.5 MHz crystal reference, output-frequency control through a 0 V to 3 V input, and a tuning range of +100 ppm. Its on-chip VCXO and analog PLL techniques allow multiple clock outputs to be produced from one external crystal. The 20-pin SOIC package also provides enough pins for supply connections, control signals, crystal interfaces, and clock outputs.
The control architecture supports external frequency adjustment without requiring a separate high-resolution digital synthesizer. A control voltage applied to the VCXO input changes the generated clock relationship by up to +100 ppm, making the circuit useful in phase-aligned receiver, transmitter, or timing systems. The manufacturer datasheet also discusses termination requirements for each clock output and recommends placing the crystal as close as practical to the device to reduce sensitivity to unwanted capacitance and signal degradation.
Typical uses include set-top box master clocks, digital television equipment, cable distribution systems, and communication equipment that requires frequency trimming. It can also support clock-generation subsystems in industrial and embedded products when the designer requires analog voltage-based tuning instead of a programmable digital PLL. The 5 V supply and 20-pin SOIC make it particularly suitable for established boards designed around conventional mixed-signal clock devices.
A key implementation consideration is power bypassing. The manufacturer datasheet states that at least one 0.1 uF capacitor should be connected between VDD on pin 15 and ground, and the capacitor should be positioned as close to the device as practical. Output termination resistors should also be placed near the relevant clock outputs, while the external crystal connection should be kept short to minimize parasitic capacitance and preserve clock stability.
This product summary combines the electrical characteristics, package information, sourcing guidance, and practical implementation notes needed to evaluate the MK2772-01SLF. It also distinguishes verified functions from application guidance, helping engineers determine whether the device fits a set-top clock architecture or whether a different clock-generator family is required.
חלופות תחליף ישיר עבור MK2772-01SLF — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
אין חלופות תואמות Drop-in עבור מוצר זה.
בקשת חלופותMK2772-01SLF מפרטים
| Product Type | VCXO and set-top clock source |
| מתח אספקה | 5 V |
| Nominal Crystal Frequency | 13.5 MHz |
| External Control Voltage | 0 V to 3 V |
| Frequency Tuning Range | +100 ppm |
| Architecture | VCXO with analog phase-locked loop |
| Output Function | Multiple clock outputs |
| מארז | 20-pin SOIC |
| סוג הרכבה | Surface mount |
| Minimum Bypass Capacitor | 0.1 uF between VDD pin 15 and ground |
| VDD Pin Number | 15 |
| Lead-Free Configuration | Lead-free ordering option |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
| AEC-Q100 Qualification | not_applicable |
מדריך תצורת פינים של MK2772-01SLF 20-pin soic
תצורת פינים עבור MK2772-01SLF (מארזת 20-pin soic). מספרי פינים, פונקציות ותרשימי חיבורים מוגדרים ב-Datasheet של היצרן. יש לעיין בו לקבלת ה-footprint המדויק והנחיות הלחמה.
אין נתוני פריסת פינים מפורטים עבור MK2772-01SLF.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
MK2772-01SLF מתאים עבור 6 יישוםs: Set-Top Box Master Clock, Digital Television Equipment, Cable Network Equipment, Communication Equipment Clocking, Industrial Timing Subsystem, Phase-Aligned Reference Circuit.
Set-Top Box Master Clock
The MK2772-01SLF fits a set-top box master-clock position because it combines a 13.5 MHz crystal reference with an on-chip VCXO, analog PLL, and multiple clock outputs. The 5 V supply matches conventional set-top electronics, while the 0 V to 3 V control input permits fine frequency adjustment by up to +100 ppm. Place the crystal close to the device to limit parasitic capacitance, and terminate each active clock output as directed by the manufacturer datasheet. This arrangement is appropriate when the system needs an analog tuning path rather than a digitally programmed PLL for clock correction and distribution.
Digital Television Equipment
Digital television equipment can use the MK2772-01SLF as a centralized clock source when multiple related clock domains must remain phase and frequency aligned. The device accepts a 13.5 MHz crystal and derives multiple outputs through its VCXO and analog PLL architecture. Its external control voltage spans 0 V to 3 V, providing a practical method for correcting small frequency errors. Confirm that each required television clock frequency, amplitude, and logic level is present before schematic release, then use short clock routes, local bypass capacitance, and correctly positioned output termination to preserve signal quality.
Cable Network Equipment
The MK2772-01SLF is suitable for cable and broadcast infrastructure that requires a stable reference with small frequency-trim capability. Its 13.5 MHz crystal input allows the system to use one reference source for multiple generated clocks, while the voltage-controlled oscillator can compensate for frequency variation. The 20-pin SOIC package supports conventional surface-mount assembly and PCB routing. Before deployment, verify the required output frequencies and the stability and phase relationships of every output against the target transport or processing standard. Control trace lengths and use source-matched termination where needed to avoid clock-quality degradation.
Communication Equipment Clocking
Communication equipment can benefit from the MK2772-01SLF when an adjustable analog clock reference is preferable to a digitally programmed synthesizer. The device operates from 5 V and accepts a 0 V to 3 V tuning voltage capable of moving the generated clocks by +100 ppm. Use this capability for coarse board-level correction or synchronization rather than assuming it replaces a high-resolution programmable PLL. Keep the crystal loop compact, bypass VDD at pin 15 with at least the specified 0.1 uF capacitor, and route clock outputs away from noisy switching nodes so the low-jitter architecture can deliver useful phase margin.
Industrial Timing Subsystem
An industrial timing subsystem can use the MK2772-01SLF when the design needs multiple derived clocks and a modest frequency-trimming range. The external control input permits adjustment of up to +100 ppm, which can compensate for crystal or system timing offsets without adding a separate digitally controlled oscillator. The 5 V device is straightforward to integrate with conventional industrial logic, provided the required output frequencies and logic thresholds are supported. Validate long-term stability, startup behavior, and temperature performance against the enclosure environment before production release, and maintain the datasheet-recommended capacitor and termination placement.
Phase-Aligned Reference Circuit
The MK2772-01SLF can serve as a phase-aligned reference circuit because its VCXO input changes the output-clock relationship by up to +100 ppm. This provides a practical adjustment method for synchronizing a local clock with an external reference or compensating for propagation and board delays. The internal analog PLL generates the required clock relationships from a 13.5 MHz crystal rather than requiring multiple independent oscillators. Treat the control voltage as an analog tuning input and filter it appropriately where needed. Validate the final tuning polarity and operating range in hardware, and avoid using the adjustment range to mask unstable layout or unsuitable crystal selection.
נתוני עזר הנדסיים עבור MK2772-01SLF — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה |
|---|---|
| Product Type | VCXO and set-top clock source |
| Brand | Renesas Electronics |
| Package | 20-pin SOIC |
| Supply Voltage | 5 V |
| Crystal Input Frequency | 13.5 MHz |
| Control Voltage Range | 0 V to 3 V |
| Frequency Tuning Range | +100 ppm |
| Clock Architecture | VCXO with analog PLL |
| Output Configuration | Multiple clock outputs |
| Minimum VDD Bypass | 0.1 uF between VDD pin 15 and ground |
מבדילים עיקריים
- Integrated analog frequency adjustment (לעומת8725AM-21LFT)
- Multiple outputs from one crystal reference (לעומת8725AM-21LFT)
- Purpose-built set-top clock-source architecture (לעומתGeneric 20-pin SOIC clock generators)
הערות תכנון
Connect at least one 0.1 uF bypass capacitor between VDD pin 15 and ground, and place it as close to the device as practical. Keep the 13.5 MHz crystal and its connection path close to the chip to minimize parasitic capacitance and sensitivity to board contamination. Follow the manufacturer datasheet layout guidance for grounding and clock-output termination.
Use the termination arrangement specified by the manufacturer for each active clock output, with the termination resistor positioned near the driver. Treat the 0 V to 3 V VCXO control input as an analog tuning node and keep it away from switching traces. Verify output levels and edge quality at the receiver because a shared package does not guarantee identical clock-output parameters.
Do not select a replacement based only on the 20-pin SOIC outline. Confirm pin assignments, supply voltage, crystal frequency, control-input range, tuning polarity, output frequencies, logic levels, and termination requirements. The +100 ppm tuning range is the maximum identified variation, not a general operating-frequency tolerance, and the control input should not be driven beyond its specified 0 V to 3 V range.
מידע על תאימות
The -SLF ordering code is identified as lead-free. RoHS, REACH, halogen-free, and conflict-minerals status are not explicitly confirmed in the available product information.
