18QHTF21-12.100-PD

Overview

The 18QHTF21-12.100-PD is a 12.1 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. 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 2.0x1.6 mm.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output signaling
• Includes standby mode capability for power reduction

Applications

• General clock signal generation
• Embedded system timing references
• Portable electronic devices requiring low power consumption

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 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 12.1 MHz reference is required in space-constrained applications. The choice is driven by the need for low-voltage operation and integrated power-down functionality. Consider the small form factor suitable for high-density board designs where standard leaded packages cannot fit.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0x1.6 mm footprint. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from standard continuous-operation variants in the same physical package family.

Replacement Considerations

Direct substitutes include other 12.1 MHz LVCMOS oscillators in 4-SMD 2.0x1.6mm packages with 1.8V operation. Verify pin compatibility and electrical parameters such as jitter and phase noise if replacing with different manufacturers.