18QHTF21-117.000-PD

Overview

The 18QHTF21-117.000-PD is a 117 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates with an LVCMOS output logic and supports a 1.8V supply voltage. The device features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output interface
• Includes Standby (Power Down) functionality
• Utilizes a surface-mount 4-SMD, No Lead package

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design specifications. Confirm that the 1.8V operating voltage aligns with the system power rails. Ensure the 4-SMD footprint matches the PCB layout constraints. Cross-reference the datasheet for any specific handling or soldering recommendations to maintain component integrity during assembly.

Selection Notes

Select this component when a precise 117 MHz clock source is required with low power consumption capabilities. The LVCMOS output ensures compatibility with standard digital logic families. The integrated standby feature allows for dynamic power management in battery-operated devices. Consider the small form factor for space-constrained designs requiring high-frequency stability.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, including 3.3V variants. The 'PD' suffix typically indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation models within the same physical package family.

Replacement Considerations

Direct substitutes include other 117 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson, NDK, or SiTime. Verify electrical compatibility regarding supply voltage, current consumption, and output drive strength. Mechanical footprint and pinout definitions must match exactly to ensure board-level interchangeability without redesign.