18QHTF21-21.5385-PD

Oscillators Overview

The 18QHTF21-21.5385-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.5385 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode for power down functionality to reduce energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.00mm x 1.60mm and a maximum height of 2.00mm. Frequency stability is specified at ±50ppm.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode for power-down capability
• Utilizes a compact 4-SMD no-lead surface mount package

Oscillators Applications

• General purpose clock signal generation
• Low-power embedded systems
• Digital communication interfaces

Oscillators Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD footprint matches the PCB layout requirements. Check for any specific handling instructions regarding the no-lead package type during assembly processes.

Oscillators Selection Notes

Select this component when a precise 21.5385 MHz clock source is required for LVCMOS-compatible circuits. The choice is driven by the need for low voltage operation at 1.8V and the inclusion of a power-down feature for energy efficiency. The small form factor makes it suitable for space-constrained designs. Consider the ±50ppm stability requirement relative to system timing constraints.

Oscillators Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies within the same physical footprint and electrical specifications. Other variants in the series include different frequencies such as 21.5385 MHz, 51.2 MHz, and 39.2385 MHz, all sharing the 1.8V supply and LVCMOS output characteristics.

Oscillators Replacement Considerations

Direct substitutes must match the 21.5385 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent stability and temperature ranges. Cross-reference with other manufacturers offering similar low-profile oscillators if availability is an issue.