18QHTF21-13.56875-PD

Overview

The 18QHTF21-13.56875-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 13.56875 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Supports standby mode to reduce power consumption during idle periods
• Utilizes a leadless SMD package for automated surface-mount assembly

Applications

• RFID reader circuits operating at 13.56 MHz
• Smart card interface modules
• Portable electronic devices requiring low-power clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package dimensions match the PCB footprint specifications to prevent assembly errors.

Selection Notes

Select this component when a stable 13.56875 MHz clock signal is required for RFID or NFC applications. The LVCMOS output ensures direct interfacing with digital logic without additional buffering. The standby feature makes it suitable for battery-operated devices where power efficiency is critical alongside timing accuracy.

Part Context

This part belongs to the QHTF series of quartz crystal oscillators from Mercury Electronics. The series is characterized by small form factors and low power consumption. The '18' prefix typically indicates the 1.8V operating voltage range, while the numeric suffix defines the specific oscillation frequency.

Replacement Considerations

Direct substitutes must match the 13.56875 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent performance metrics such as phase noise and stability before substitution.