18QHTF21-75.757575-PD

Overview

The 18QHTF21-75.757575-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 75.757575 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, requiring a supply voltage of 1.8V. It features a standby or power-down function to manage energy consumption when the oscillator is not in active use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This specific model variant includes the -PD suffix, indicating the inclusion of the power-down capability within the standard XO configuration.

Feature Summary

• Integrates LVCMOS output logic for direct digital interface compatibility
• Includes standby mode functionality to reduce power consumption during idle periods
• Utilizes a lead-free surface-mount package for automated assembly processes

Applications

• Clock generation for high-speed digital signal processing systems
• Timing reference sources for communication interface circuits
• Power management units requiring precise low-voltage timing signals

Procurement Notes

Verify that the ordering suffix matches the required electrical characteristics, specifically confirming the presence of the power-down feature associated with the PD designation. Ensure the requested frequency tolerance and load capacitance align with the system design requirements before finalizing the purchase order. Cross-reference the manufacturer part number with distributor catalogs to confirm current availability and authenticity.

Selection Notes

Select this component when a 1.8V supply voltage is mandated by the system architecture. The choice is appropriate for designs requiring a 75.757575 MHz clock source with minimal footprint constraints due to the small SMD package. Consider the power-down feature if energy efficiency is critical during system sleep states. Evaluate thermal performance and stability requirements against the standard specifications provided in the official datasheet.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage, small-form-factor timing solutions. The series is engineered for modern portable electronics and compact industrial devices where space and power are limited. The 18QHTF21 models generally offer stable frequency generation across standard operating temperature ranges, supporting various digital logic families through different output configurations.

Replacement Considerations

Substitute parts must match the 75.757575 MHz frequency, 1.8V supply voltage, LVCMOS output, and 4-SMD no-lead package dimensions. Verify that any alternative component supports the same power-down functionality if required by the circuit design. Ensure the replacement maintains equivalent frequency stability and phase noise characteristics to prevent system timing errors.