18QHTF21-117.3491-PD

Overview

The 18QHTF21-117.3491-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a fixed frequency of 117.3491 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a power-down capability via a standby control pin to reduce energy consumption when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode for power-down functionality
• Utilizes a compact 4-SMD no-lead package format

Applications

• High-speed data communication systems
• Network infrastructure equipment
• Consumer electronics requiring precise timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure the correct voltage and package variant. Confirm that the 1.8V supply requirement aligns with the target system design. Check for any recent updates to the RoHS compliance status or lead-free specifications before finalizing procurement orders.

Selection Notes

Select this component when a stable 117.3491 MHz clock signal is required for LVCMOS-compatible circuits. Ensure the PCB layout accommodates the 2.0x1.6mm footprint. Consider the power-down feature if energy efficiency during idle states is a critical design parameter for the application.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. 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 function, distinguishing it from continuous-operation variants.

Replacement Considerations

Direct substitutes include other 117.3491 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical parameters such as load capacitance and drive strength before swapping components.