18QHTF21-74.2125-PD

Overview

The 18QHTF21-74.2125-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 74.2125 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby mode with power-down capability. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• LVCMOS output logic interface
• Standby mode with power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific ordering suffix to confirm the exact output load and tolerance requirements. Ensure the 1.8V supply voltage aligns with the target system design. Confirm the 4-SMD package footprint matches the PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a precise 74.2125 MHz reference. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the power-down feature if energy efficiency during idle states is a critical design parameter.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options within small form factors. The 'PD' suffix typically indicates the inclusion of a power-down control pin or standby function.

Replacement Considerations

Direct substitutes must match the 74.2125 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package size. Verify electrical specifications against original datasheets before swapping.