18QHTF21-57.405-PD

Overview

The 18QHTF21-57.405-PD is a 57.405 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a Standby function for power-down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Generates a precise 57.405 MHz clock signal using standard XO technology.
• Outputs signals via LVCMOS logic interface for digital circuit compatibility.
• Supports low-power operation through an integrated Standby mode.

Applications

• High-speed data communication interfaces requiring stable clock sources
• Embedded systems utilizing 1.8V logic levels
• Portable electronic devices where small form factor is critical

Procurement Notes

Verify the specific frequency suffix matches the system requirement of 57.405 MHz. Confirm that the 1.8V supply voltage aligns with the target board design. Ensure the 4-SMD No Lead package footprint corresponds to the PCB layout. Check for any specific RoHS or environmental compliance documentation required for the project.

Selection Notes

Select this component when a fixed 57.405 MHz frequency is necessary for synchronous digital circuits. The choice depends on the availability of a 1.8V supply rail and the need for a low-profile surface-mount solution. Consider the thermal characteristics and operating temperature range relative to the intended application environment.

Part Context

This part belongs to the 18QHTF21 series of ultra-small crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a 2.0x1.6 mm package. The '-PD' suffix indicates the inclusion of a power-down capability, distinguishing it from standard continuous-operation variants in the same family.

Replacement Considerations

Direct substitutes must match the 57.405 MHz frequency, 1.8V voltage, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility before replacing. Generic replacements may differ in phase noise or stability specifications.