18QHTF21-27.255-PD

Oscillators Overview

The 18QHTF21-27.255-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 27.255 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) control function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals in low-voltage digital systems.

Oscillators Feature Summary

• Supports Low Voltage Complementary Metal Oxide Semiconductor (LVCMOS) output interface
• Includes Standby mode capability for power down functionality
• Utilizes quartz-based technology for frequency stability

Oscillators Applications

• Digital signal processing circuits
• Communication equipment clocking
• Microcontroller system timing

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD No Lead package footprint matches the PCB layout constraints. Check for any specific RoHS compliance documentation if required by the manufacturing process.

Oscillators Selection Notes

Select this component when a 27.255 MHz reference clock is required for LVCMOS-compatible devices. The choice is driven by the need for a small 2.0x1.6mm form factor and low voltage operation. Consider the standby feature if power efficiency during idle states is a critical design parameter. Validate thermal performance within the specified operating temperature range.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series offers various frequencies with consistent electrical characteristics and packaging. The 'PD' suffix indicates the inclusion of a power-down pin or function. These components are part of Mercury's broader portfolio of quartz-based frequency control products established since 1973.

Oscillators Replacement Considerations

Direct substitutes include other 27.255 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pin compatibility and electrical specifications such as phase noise and jitter. Cross-reference with similar Mercury models like 18QHTF21-27.255 if available. Ensure the replacement supports the same standby functionality.