18QHTF21-79.200-PD

Overview

The 18QHTF21-79.200-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 79.2 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise clock signals in space-constrained electronic designs.

Feature Summary

• Provides stable 79.2 MHz clock signal generation using LVCMOS logic
• Supports low-power operation through dedicated standby mode
• Utilizes a compact surface-mount package for efficient PCB layout

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded microcontroller timing sources

Procurement Notes

Verify the specific ordering suffix matches the required package type and lead configuration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the operating temperature range meets the environmental requirements of the final assembly. Cross-reference the manufacturer's latest datasheet for any updates on pinout or electrical characteristics before integration.

Selection Notes

Select this component when a 79.2 MHz frequency is strictly required alongside a 1.8V operating voltage. Consider the 2.0x1.6mm footprint for size constraints. Evaluate the need for power-down functionality versus continuous operation. Compare against other frequencies in the 18QHTF21 series if flexibility is needed. Ensure compatibility with LVCMOS input thresholds of the receiving device.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a standardized small outline package. The 'PD' suffix typically indicates the power-down capability variant. These components are widely used in consumer electronics and industrial control systems where reliable timing is essential.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinouts but different frequencies, such as 18QHTF21-51.200-PD or 18QHTF21-63.200-PD, provided the frequency change is acceptable. Verify mechanical compatibility and electrical specifications before substitution.