18QHTF21-13.578906-PD

Overview

The 18QHTF21-13.578906-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.578906 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm, suitable for space-constrained surface-mount applications.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby and power-down functionality
• Utilizes LVCMOS output logic for digital interfacing
• Features a compact 4-SMD no-lead form factor

Applications

• General-purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources
• Portable electronic devices requiring low power

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check the physical footprint compatibility for the 2.0x1.6mm SMD package during PCB layout validation.

Selection Notes

Select this component when a precise 13.578906 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage and power-down capability if energy efficiency is a priority. Evaluate the small 4-SMD package size against available board space constraints. Ensure the manufacturer's reliability standards meet the target application's environmental requirements.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics Ind. Co. Ltd. The series offers various frequencies within a standardized 2.0x1.6mm package. The '-PD' suffix indicates the inclusion of power-down control features. Mercury Electronics specializes in quartz frequency control products, leveraging decades of manufacturing expertise in Taiwan.

Replacement Considerations

Direct replacements must match the 13.578906 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter. Cross-reference with other manufacturers offering similar SMD oscillators with identical form factors and functional specifications.