18QHTF21-13.522-PD

Overview

The 18QHTF21-13.522-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.522 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage range of 1.8V and a standby mode for power-down functionality. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes. The component supports an operating temperature range typical for commercial or industrial environments, ensuring reliable timing performance in space-constrained electronic designs requiring precise clock signals.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power management
• Surface-mount 4-SMD no-lead package design

Applications

• General-purpose digital clock generation
• Microcontroller system timing
• Low-power embedded devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD package dimensions fit within your PCB layout constraints. Check for any RoHS compliance documentation if required by your manufacturing standards. Validate the operating temperature range against your environmental conditions to ensure reliability.

Selection Notes

Select this component when a stable 13.522 MHz clock signal is required for LVCMOS-compatible circuits. Consider the 1.8V supply voltage requirement and the availability of a standby feature for power-sensitive applications. The small 4-SMD form factor makes it suitable for dense PCB layouts. Evaluate the need for a standard XO versus a TCXO based on your phase noise and stability requirements.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics Ind. Co. Ltd. The series offers various frequencies with consistent packaging and electrical characteristics. Mercury Electronics is a established supplier of frequency control products, including quartz crystals and oscillators, with a history dating back to 1973. This specific model represents a standard XO variant optimized for low-voltage operation.

Replacement Considerations

Direct substitutes may include other 13.522 MHz LVCMOS oscillators in a 4-SMD package from manufacturers like Epson, NDK, or SiTime. Ensure pinout compatibility and voltage levels match. Verify that the replacement meets the same frequency accuracy and temperature stability specifications. Cross-reference datasheets for mechanical footprint differences.