18QHTF21-90.000-OE

Overview

The 18QHTF21-90.000-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 90.000 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 3.3V and features an Enable/Disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 3.2 x 2.5 mm. This component provides precise timing signals for digital circuits requiring stable clock sources.

Feature Summary

• Provides stable 90 MHz clock signal via LVCMOS interface
• Includes hardware enable/disable control functionality
• Compact surface-mount design suitable for space-constrained applications

Applications

• Digital system clock generation
• Communication equipment timing
• Embedded processor clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 3.3V supply voltage matches your system's power rails. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check the operating temperature range specifications to ensure suitability for your environmental conditions. Request official datasheets from authorized distributors to confirm current manufacturing status and pinout details.

Selection Notes

Select this component when a fixed 90 MHz frequency is required with low cost and small footprint. Consider the 3.3V supply constraint and LVCMOS compatibility with downstream logic. Evaluate the need for enable/disable control versus always-on operation. Compare size constraints against the 3.2x2.5mm package dimensions. Assess if the standard XO stability meets your jitter and phase noise requirements compared to TCXO alternatives.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and supply voltages. The 'OE' suffix typically indicates an enable pin configuration. These components are designed for general-purpose timing applications where moderate stability and cost-effectiveness are prioritized over high-performance specifications found in oven-controlled or temperature-compensated variants.

Replacement Considerations

Direct replacements must match the 90 MHz frequency, 3.3V supply, LVCMOS output, and 3.2x2.5mm package. Verify pin compatibility and enable logic polarity. Cross-reference with other manufacturers offering similar SMD oscillators. Ensure thermal and electrical characteristics align with the original design requirements.