18QHTF21-70.0686-PD

Overview

The 18QHTF21-70.0686-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, operating at a nominal frequency of 70.0686 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a Standby (Power Down) control mode for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for precision timing applications requiring stable clock signals within electronic circuits.

Feature Summary

• LVCMOS output logic interface
• Standby (Power Down) control capability
• Compact 4-SMD No Lead surface mount package

Applications

• Precision timing applications
• Digital signal processing systems
• Communication equipment clock sources

Procurement Notes

Verify the specific ordering suffix to confirm the control function, as 'PD' indicates Standby (Power Down) functionality distinct from OE (Enable/Disable) variants. Ensure the supply voltage matches the 1.8V requirement and that the 2.0x1.6mm footprint aligns with the PCB layout. Confirm the frequency tolerance and stability specifications against system requirements before finalizing procurement orders.

Selection Notes

Select this model when a 1.8V supply and LVCMOS interface are required for space-constrained designs. The 2.0x1.6mm package size offers a small form factor suitable for dense layouts. Consider the Standby feature if power efficiency during idle states is critical. Compare against other frequencies in the 18QHTF21 series if different clock speeds are needed while maintaining the same package and electrical characteristics.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series includes various frequencies such as 96.768 MHz, 51.2 MHz, and 48.7056 MHz, all sharing similar electrical profiles and packaging. The manufacturer, Mercury Electronics, has a history of producing quartz crystals and frequency control products since 1973, positioning itself as a pioneer in the Taiwan quartz industry.

Replacement Considerations

Direct substitutes within the same series include 18QHTF21-96.768-PD, 18QHTF21-51.200-PD, and 18QHTF21-48.7056-PD, which share identical package dimensions and control logic but operate at different frequencies. Variants with OE (Enable/Disable) control, such as 18QHTF21-44.200-OE, are electrically compatible regarding voltage and output type but differ in control mechanism.