18QHTF21-27.040-PD

Oscillators Overview

The 18QHTF21-27.040-PD is a 27.04 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates with LVCMOS output logic and requires a 1.8V supply voltage. The device features a power-down function controlled by the PD suffix, allowing for standby mode management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital interface compatibility
• Includes power-down functionality to enable standby mode control
• Utilizes a small form factor 4-SMD no-lead package design

Oscillators Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems requiring low voltage operation
• Portable devices utilizing space-constrained SMD packaging

Oscillators Procurement Notes

Verify the specific ordering suffix 'PD' confirms the inclusion of the power-down feature as distinct from other variants like 'OE'. Ensure the supply voltage requirement of 1.8V aligns with the target system's power rails. Confirm the package footprint matches the 2.0x1.6mm specification during PCB layout review to ensure proper soldering and mechanical fit.

Oscillators Selection Notes

Select this component when a precise 27.04 MHz frequency is required alongside low-power standby capabilities. The 1.8V operating voltage makes it suitable for modern low-voltage digital logic families. Consider the 4-SMD package size if board real estate is limited compared to larger oscillator packages.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and output types. The specific model denotes a standard XO configuration. The manufacturer has produced frequency control products since 1973, establishing its role in the crystal industry.

Oscillators Replacement Considerations

Direct substitutes include other 27.04 MHz LVCMOS oscillators in 2.0x1.6mm packages with 1.8V operation and power-down pins. Verify pinout compatibility and electrical specifications before swapping.