18QHTF21-13.5672-PD

Overview

The 18QHTF21-13.5672-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.5672 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function. It is housed in a compact 4-SMD, no lead package with dimensions of 2.00mm x 1.60mm.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features a standby mode to reduce power consumption during idle periods
• Utilizes a surface-mount 4-SMD no-lead package for automated assembly

Applications

• RFID reader systems requiring 13.56 MHz clock signals
• Smart card interfaces
• Contactless payment terminals

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 2.00mm x 1.60mm SMD package dimensions to prevent soldering defects. Check for RoHS compliance if required by project specifications.

Selection Notes

Select this component when a precise 13.5672 MHz clock source is needed for RFID or NFC applications. The LVCMOS output ensures direct interfacing with microcontrollers without additional level shifting. The low-profile SMD package is suitable for space-constrained portable devices. Consider the standby feature if power management is critical for battery-operated equipment.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies tailored for communication standards. The 'PD' suffix indicates the inclusion of a power-down control pin. These components are designed for high reliability in consumer electronics and industrial control systems.

Replacement Considerations

Direct substitutes include other 13.5672 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson or NDK. Verify pinout compatibility and electrical parameters such as current consumption and startup time. Cross-reference with the 18QHTF32 series if a larger 3.2x2.5mm package is acceptable.