18QHTF21-10.737418-PD

Overview

The 18QHTF21-10.737418-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 10.737418 MHz with LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby power-down function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Features a low-profile 4-SMD no-lead surface mount package design
• Includes a standby mode capability for power management

Applications

• General purpose clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Consumer electronics requiring precise frequency standards

Procurement Notes

Verify the specific ordering suffix to confirm the presence of the power-down feature and the exact operating voltage. Ensure the selected variant matches the required 1.8V supply specification and LVCMOS output type. Confirm that the 2.0x1.6mm package footprint aligns with the target PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when a precise 10.737418 MHz timing source is required for LVCMOS-compatible circuits. The choice depends on the necessity for a 1.8V supply rail and the availability of a 4-SMD no-lead footprint. Consider the standby functionality if power 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 Electronics. The series typically offers various frequencies within a small form factor. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from continuous-operation variants within the same physical package family.

Replacement Considerations

Direct substitutes include other 10.737418 MHz LVCMOS oscillators in a 2.0x1.6mm 4-SMD package with 1.8V operation and standby capabilities. Verify pinout compatibility and electrical specifications such as load capacitance and drive strength before substitution.