18QHTF21-69.550-PD

Overview

The 18QHTF21-69.550-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 69.55 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and an integrated standby or power-down function to minimize energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Integrates a power-down mode for reduced current consumption
• Provides stable LVCMOS signal output
• Utilizes a leadless surface-mount package design

Applications

• Portable electronic devices requiring low power consumption
• Communication systems utilizing standard clock signals
• Embedded control circuits needing precise timing references

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply voltage aligns with the host circuit's power rails. Ensure the 4-SMD no-lead footprint matches the PCB land pattern to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-voltage, small-footprint oscillator with power management capabilities is required. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the 2.0x1.6mm size constraint for dense board layouts. Validate that the 69.55 MHz frequency meets the exact timing needs of the application without requiring external dividers.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options within a standardized small outline package. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from standard continuous-operation variants within the same physical form factor family.

Replacement Considerations

Direct substitutes must match the 69.55 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile oscillators with standby functions to ensure equivalent performance metrics.