18QHTF21-6.7458-PD

Overview

The 18QHTF21-6.7458-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 6.7458 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, featuring a supply voltage of 1.8V. It includes a standby or power-down function to manage energy consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Integrates a standby (power down) mode for energy efficiency
• Operates on a 1.8V supply voltage suitable for portable electronics

Applications

• Battery-powered consumer electronics
• Portable communication devices
• Low-power embedded systems

Procurement Notes

Verify the specific frequency suffix matches the required system clock. Confirm the PD suffix indicates the power-down feature. Ensure the 1.8V supply requirement aligns with the target circuit design. Check the 4-SMD no-lead package dimensions for PCB footprint compatibility. Validate RoHS compliance status if environmental regulations apply.

Selection Notes

Select this model when a precise 6.7458 MHz clock signal is required for LVCMOS interfaces. Consider the 1.8V operating voltage for compatibility with modern low-voltage logic families. The integrated power-down feature makes it suitable for applications requiring active and sleep states. Evaluate the small 2.0x1.6 mm footprint for space-constrained designs.

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. The 'PD' suffix denotes the inclusion of a power-down control pin. The '18' prefix likely refers to the 1.8V supply voltage variant within the product line.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical 6.7458 MHz frequency and LVCMOS output. Verify that replacement parts maintain the same 1.8V supply and 4-SMD no-lead package. Cross-reference with Mercury United Electronics Inc. listings for equivalent specifications.