18QHTF21-27.027-PD

Oscillators Overview

The 18QHTF21-27.027-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 27.027 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Utilizes LVCMOS output logic interface

Oscillators Applications

• Digital signal processing systems
• Communication equipment requiring precise timing
• Embedded control circuits

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 specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a stable 27.027 MHz reference clock is required for LVCMOS-compatible digital interfaces. The choice is driven by the need for low-power operation via the standby feature and the constraint of a small 2.0x1.6 mm form factor. Consider the operating temperature range and phase noise specifications if high-frequency jitter performance is critical for the application.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized 4-SMD package. The suffix PD indicates the inclusion of power-down capability, distinguishing it from continuous-operation variants within the same physical footprint family.

Oscillators Replacement Considerations

Direct substitutes must match the 27.027 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pin compatibility and electrical characteristics such as start-up time and current consumption to ensure functional equivalence without redesigning the host circuit.