18QHTF21-13.5725-PD

Overview

The 18QHTF21-13.5725-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 13.5725 MHz with an LVCMOS output logic level. The device functions on a single 1.8V supply voltage and includes a power-down feature for standby mode control. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm by 1.6mm. This component is designed for timing applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates power-down functionality for energy management
• Utilizes LVCMOS output interface for digital compatibility

Applications

• General-purpose digital circuit timing
• Embedded system clock generation
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure the 1.8V supply rail stability meets the datasheet recommendations to maintain signal integrity. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package dimensions to avoid assembly issues during manufacturing.

Selection Notes

Select this component when a stable 13.5725 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage constraint and ensure the power budget allows for active and standby states. The small form factor makes it suitable for high-density board layouts where space is limited compared to larger oscillator packages.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 4-SMD no-lead package. The series provides consistent mechanical dimensions across different frequency options, simplifying inventory management for multi-frequency designs while maintaining uniform mounting requirements.

Replacement Considerations

Direct replacements must match the 13.5725 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package size. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if substituting with components from other manufacturers.