MK2727SLF - 27MHz VCXO/PLL Clock Synthesizer | Renesas
MPN: MK2727SLF ✓ ActiveMK2727SLF Overview
A VCXO is a crystal oscillator whose output frequency can be adjusted by an external control voltage. Adding a phase-locked loop allows the oscillator frequency to be stabilized against a reference, making this device part of the clock-generation and frequency-synthesis hierarchy. In system terms, the MK2727SLF is a Clock & Timing IC that converts a crystal input into a controlled CMOS output suitable for clocking or frequency-reference functions.
The verified part description identifies the MK2727SLF as a low-cost 27 MHz VCXO. It uses a crystal input, provides a CMOS output, and contains one clock circuit. These characteristics make frequency stability and external control central to its selection. The 8-SOIC package also provides a conventional surface-mount footprint, although pin assignments, voltage limits, control sensitivity, and output-drive details must be confirmed directly from the manufacturer datasheet before layout or replacement work.
Technically, the MK2727SLF combines a crystal oscillator with PLL-based frequency control. Such an arrangement can reduce long-term frequency variation relative to an uncompensated crystal oscillator by locking the controlled oscillator to a reference. However, loop bandwidth, capture range, tuning voltage, reference requirements, and phase-noise performance are not present in the supplied verified excerpts, so those values should not be inferred from the 27 MHz headline specification.
Typical applications for this device include communication modules, industrial control electronics, embedded equipment, and other systems requiring a tunable or PLL-stabilized CMOS clock. The single-circuit architecture is appropriate where one local clock domain is needed. Care is required when multiple clock domains exist because the supplied data confirms only one clock circuit and does not establish independent output-channel behavior.
For a robust design, verify the complete pinout, recommended crystal load, bypass-capacitor values, control-voltage range, and output impedance from the eight-page manufacturer datasheet. Confirm loop stability and startup behavior in the target reference configuration. Do not treat the distributor summary as a substitute for the datasheet when selecting crystal parameters or determining PCB land patterns.
This product record consolidates the verified 27 MHz VCXO description, PLL and CMOS classifications, 8-SOIC package information, source listings, and engineering guidance. It also distinguishes confirmed characteristics from parameters that still require datasheet-level verification, reducing the risk of selecting or replacing the MK2727SLF from incomplete catalogue information.
Drop-in alternatives for MK2727SLF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MK2727SLF (same form factor and footprint) — differing in Device Type, Package Type.
MK2727S
✅ Drop-InContact for price
View Datasheet →MK2727SLF Specifications
| Device Type | VCXO / PLL clock synthesizer |
| Rated Maximum Frequency | 27 MHz |
| Oscillator Type | Voltage-controlled crystal oscillator |
| PLL | Yes |
| Input Type | Crystal |
| Output Type | CMOS |
| Number of Circuits | 1 circuit |
| Package Type | 8-pin SOIC |
| Package Width | 0.154 inch |
| Package Width Metric | 3.90 mm |
| Mounting Type | Surface mount |
| Manufacturer Description | Low-cost 27 MHz VCXO |
MK2727SLF 3.90 mm Pin Configuration Guide
Pin configuration for MK2727SLF (3.90 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for MK2727SLF.
Refer to the datasheet for full pin configuration.
Typical Applications
MK2727SLF is suitable for 6 applications: Communication Module Clock Reference, Industrial Embedded Control Clock, RF Front-End Frequency Reference, Telecommunications Network Module, Precision Instrumentation Reference, Consumer Electronics Local Master Clock.
Communication Module Clock Reference
The MK2727SLF fits communication equipment requiring a locally controlled 27 MHz reference because the verified device is a 27 MHz VCXO with a PLL, crystal input, and CMOS output. Placing the oscillator near the active RF or baseband circuitry can shorten sensitive clock paths and reduce susceptibility to board-level coupling. The PLL architecture is useful when the source must remain disciplined against a stable reference, while the VCXO control input permits tuning where system calibration is available. Designers must still verify the output-frequency range, tuning sensitivity, reference requirements, phase noise, and crystal load before release because these values are not present in the supplied excerpts.
Recommended
Industrial Embedded Control Clock
The MK2727SLF can supply a controlled CMOS clock for an embedded industrial controller when one stable 27 MHz reference domain is required. Its single-circuit architecture avoids the complexity of a multi-channel clock tree, while voltage control offers a useful calibration path if the system must correct frequency against an external reference. For factory equipment, the designer should confirm operating-temperature limits, supply tolerance, PLL loop stability, and long-term aging from the manufacturer datasheet. Keep routing away from motors, switching supplies, and high-current power stages to prevent the VCXO control path and CMOS output from picking up industrial EMI.
Recommended
RF Front-End Frequency Reference
A 27 MHz VCXO with an integrated PLL is potentially useful as a tunable frequency reference for RF front ends, transceivers, and frequency-synthesis blocks. The verified CMOS output can feed compatible clock or synthesis circuitry, while voltage adjustment can support production calibration or reference-tracking schemes. The key design trade-off is that the supplied data does not establish phase noise, tuning range, capture behavior, or spur performance. Engineers should therefore characterize loop bandwidth and spurious response with the intended reference and crystal before relying on the MK2727SLF for sensitive RF paths.
Recommended
Telecommunications Network Module
The MK2727SLF is suitable for consideration in a telecommunications module that needs a compact, voltage-controllable 27 MHz reference. The 8-SOIC surface-mount package supports standard board assembly, and the integrated PLL can help discipline the VCXO when a suitable reference is available. A practical implementation should isolate the oscillator from high-speed data lines and switching regulators, provide the datasheet-recommended crystal and bypass network, and verify output jitter under data traffic. Because supply-voltage tolerance and temperature behavior are not included in the verified excerpts, those limits must be checked before use in carrier-grade or regulated network equipment.
Recommended
Precision Instrumentation Reference
The MK2727SLF may serve as a controllable clock reference in measurement equipment where a single 27 MHz CMOS clock is required. Voltage control can be used to trim the oscillator against a higher-accuracy external reference, potentially improving system-level frequency repeatability. The design must account for tuning noise, thermal drift, and PLL stability rather than assuming that the 27 MHz label guarantees precision. Place the oscillator on a quiet analog or mixed-signal region of the PCB, provide a stable supply, and validate phase-noise and timing-jitter requirements with the exact reference and crystal configuration proposed for production.
Recommended
Consumer Electronics Local Master Clock
The MK2727SLF can support a local master clock in consumer electronics that needs a compact, tunable reference rather than a basic fixed crystal oscillator. The 27 MHz output class is familiar to many digital subsystems, while the VCXO and PLL functions permit calibration or reference synchronization. Designers should account for consumer-product cost and availability goals, but should not trade away startup reliability or EMI margin. Confirm the recommended crystal ESR and load capacitance, maintain short output routing, and use appropriate filtering on the tuning control path. The supplied evidence does not establish consumer-grade temperature limits or lifecycle commitments.
Recommended
Recommended Products Summary
Engineering reference data for MK2727SLF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MK2727S |
|---|---|---|
| Package | 8-SOIC | 8-SOIC |
| Brand | Renesas Electronics | Renesas Electronics |
Key Differentiators
- Verified 27 MHz VCXO positioning (vs MK2727S)
- Integrated PLL classification (vs MK2727S)
- Documented CMOS output (vs MK2727S)
- Same-package family comparison option (vs MK2727S)
Design Notes
Place the MK2727SLF, crystal, and crystal-load components close together and away from switching nodes and high-speed digital routes. The verified material establishes an 8-SOIC VCXO/PLL but does not provide the reference layout, so use the manufacturer datasheet's recommended topology and land pattern. Keep the CMOS output trace short and provide a continuous ground reference; excessive loop area around the oscillator can increase susceptibility to EMI and reference instability.
Provide a clean, low-noise supply to the MK2727SLF and verify its permitted voltage range directly in the manufacturer datasheet. Do not infer the operating voltage from the 27 MHz frequency or from the category of the device. If the tuning-control path carries a DC command, filter the control line where necessary and ensure that the surrounding circuit does not inject modulation into the VCXO. Decoupling values and supply sequencing must follow the datasheet recommendation.
Do not approve a replacement based only on the shared 8-SOIC package and MK2727 family name. The supplied MK2727S comparison describes a different use case, while the MK2727SLF is specifically identified as a 27 MHz VCXO. Before substitution, compare pin names, crystal connections, supply limits, VCXO control range, PLL reference configuration, output drive, phase noise, temperature range, and recommended crystal loading on a complete datasheet-to-datasheet basis.
Validate the CMOS clock edge quality and jitter at the receiving device rather than relying only on the nominal 27 MHz output. The verified excerpts do not provide rise time, fall time, jitter, output impedance, or phase-noise limits. Account for PCB capacitance, connector loading, and any downstream fanout when interpreting timing margins. If the clock is distributed across a board, use an appropriate clock-tree strategy and verify that no downstream device imposes excessive capacitive loading.
Compliance Information
The supplied verified excerpts identify Renesas Electronics as the manufacturer but do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable because the MK2727SLF is a clock-generation IC rather than an automotive-qualified device in the supplied data.