18QHTF21-64.1938-PD

Overview

The 18QHTF21-64.1938-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 64.1938 MHz and utilizes LVCMOS output logic. The device is designed for 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 with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby capability for power management
• Utilizes LVCMOS output interface

Applications

• Digital signal processing systems
• Communication equipment requiring precise timing
• Embedded control circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet to ensure reliable oscillator performance.

Selection Notes

Select this component when a 64.1938 MHz clock source is required in a space-constrained environment. The 2.0x1.6 mm footprint suits high-density PCB layouts. Ensure compatibility with LVCMOS inputs and verify that the 1.8V operating voltage aligns with the target system architecture.

Part Context

This model belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies in a standardized small outline package. The PD suffix indicates the inclusion of a power-down pin or function, distinguishing it from non-stby variants within the same form factor family.

Replacement Considerations

Direct substitutes must match the 64.1938 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6 mm package. Verify equivalent electrical characteristics and pinout compatibility to ensure seamless integration without circuit modification.