18QHTF21-66.5432-PD

Overview

The 18QHTF21-66.5432-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.5432 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic levels
• Includes Standby or Power Down functionality for energy management
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems requiring 1.8V operation
• Embedded applications necessitating low-profile surface mount components

Procurement Notes

Verify the specific frequency suffix matches the required 66.5432 MHz specification. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package footprint fits the PCB layout constraints. Check for any additional ordering suffixes that may indicate specific tolerance or temperature range requirements not covered in the standard description.

Selection Notes

Select this component when a precise 66.5432 MHz timing source is required within a 1.8V system architecture. The choice is driven by the need for LVCMOS compatibility and the physical space limitations addressed by the small 2.0x1.6mm form factor. Consider the power-down feature if dynamic power management is a critical design requirement for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series typically offers various frequencies in a standardized small outline package. Mercury Electronics is a manufacturer with a history in frequency control products, providing solutions for diverse electronic timing needs.

Replacement Considerations

Direct substitutes must match the 66.5432 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics before substitution. Cross-reference with other manufacturers offering similar low-voltage SMD oscillators.