18QHTF21-12.504-PD

Overview

The 18QHTF21-12.504-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 12.504 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Integrated standby power-down capability
• Surface-mount 4-SMD no-lead package

Applications

• Digital signal processing circuits
• Communication equipment timing
• Microcontroller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD footprint matches the PCB layout specifications to guarantee proper soldering and electrical connection during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS compatibility. The 12.504 MHz frequency suits specific data transmission standards. Consider the small form factor of the 4-SMD package for space-constrained designs. Validate thermal performance within the specified operating temperature range for the intended environment.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies including 51.2 MHz and 21.5 MHz variants. The series is characterized by its quartz-based stability and compact SMD packaging. Mercury Electronics has extensive experience in frequency control products, positioning this model as a reliable timing solution for modern electronic systems.

Replacement Considerations

Direct substitutes include other 12.504 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical parameters such as phase noise and jitter before substitution. Alternative models from the same manufacturer family may offer different frequency options but require functional equivalence checks.