18QHTF21-123.500-PD

Overview

The 18QHTF21-123.500-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 123.5 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a 1.8V supply voltage. It features a standby mode with power-down capability to reduce energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby functionality with power-down capability
• Operates on a 1.8V supply voltage rail

Applications

• Battery-powered portable devices
• Low-power electronic systems
• Digital signal processing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target system design before procurement. Confirm that the 4-SMD no-lead package dimensions align with the PCB footprint specifications. Ensure the manufacturing date code meets project timeline requirements. Cross-reference the datasheet for any updates regarding RoHS compliance or material declarations to ensure regulatory adherence for the intended market.

Selection Notes

Select this component when a precise 123.5 MHz clock source is required for LVCMOS-compatible digital logic. The 1.8V operating voltage makes it suitable for modern low-power integrated circuits. Consider the standby feature if power management is critical for the application. Evaluate the thermal performance and stability requirements against the specified operating temperature range to ensure reliable operation under environmental stress conditions.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a small form factor. Mercury Electronic has been manufacturing frequency control products since 1973, specializing in quartz crystals and oscillators. This specific model represents a standard XO variant optimized for low-voltage digital applications.

Replacement Considerations

Compatible substitutes include other 123.5 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD no-lead packaging. Verify pinout compatibility and electrical characteristics such as rise/fall times and duty cycle before substitution.