18QHTF21-67.800-PD

Overview

The 18QHTF21-67.800-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 67.8 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby mode for power down functionality. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range suitable for general electronic applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode capability for power reduction
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• Battery-powered portable devices
• General purpose clock signal generation
• Digital circuit timing reference

Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and frequency tolerance are selected. Confirm that the 1.8V supply requirement aligns with the target system design. Check for RoHS compliance status if environmental regulations apply to the end product. Ensure the 4-SMD footprint matches the PCB layout constraints.

Selection Notes

Select this component when a precise 67.8 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage and low current consumption for energy-efficient designs. Evaluate the 2.0x1.6mm package size against available board space. Compare performance requirements against other frequencies in the 18QHTF21 series if alternative timing solutions are needed.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics Ind. Co. Ltd. The series offers various frequencies including 51.2 MHz, 67.0 MHz, and 68.665 MHz. All variants share similar electrical characteristics, such as 1.8V operation and LVCMOS outputs, differing primarily in frequency and specific ordering codes.

Replacement Considerations

Direct substitutes within the same series include 18QHTF21-67.000-PD and 18QHTF21-68.665-PD, provided the frequency difference is acceptable. Other Mercury Electronics oscillators with matching 1.8V LVCMOS specifications may serve as alternatives if pinout and package dimensions are identical.