18QHTF21-15.550-PD

Oscillators Overview

The 18QHTF21-15.550-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 15.55 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a power-down function via a standby control input. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes a dedicated standby pin for power-down functionality to reduce consumption
• Utilizes a small-footprint 4-SMD no-lead package for space-constrained designs

Oscillators Applications

• Portable electronic devices requiring low-power clock sources
• Communication modules needing stable 15.55 MHz timing references
• Embedded systems utilizing LVCMOS-compatible microcontrollers

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable and within the specified operating range. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions precisely to avoid assembly issues. Check for any specific handling sensitivity regarding electrostatic discharge during installation.

Oscillators Selection Notes

Select this component when a fixed 15.55 MHz frequency is required rather than a programmable alternative. Consider the 1.8V supply constraint and LVCMOS interface compatibility with the target logic family. Evaluate the need for the standby feature if power management is critical. Compare package size against available board real estate to ensure the 2.0x1.6 mm form factor fits the design constraints.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard XO oscillators from Mercury Electronic. The series offers various frequencies including 8 MHz, 15.7 MHz, and 51.2 MHz variants. All members share similar electrical characteristics and packaging, differing primarily in their output frequency specifications. The manufacturer has extensive experience in quartz crystal production since 1973.

Oscillators Replacement Considerations

Direct substitutes include other 15.55 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and thermal performance when swapping manufacturers. Ensure the replacement maintains the same standby control functionality and frequency stability.