18QHTF21-49.09091-OE

Overview

The 18QHTF21-49.09091-OE is a standard XO oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.09091 MHz with an LVCMOS output type. The device requires a supply voltage of 1.8V and features enable/disable functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The unit offers a frequency stability of ±50ppm and is designed for surface-mount applications.

Feature Summary

• LVCMOS output interface
• Enable/Disable control capability
• Compact 4-SMD no-lead package

Applications

• General electronic timing circuits
• Digital signal processing systems
• Communication equipment

Procurement Notes

Verify the exact frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system design. 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 49.09091 MHz clock source is required with low power consumption. The LVCMOS output is suitable for digital logic interfaces. Consider the ±50ppm stability for applications not requiring high-precision timing. The small form factor makes it ideal for space-constrained designs where surface mounting is preferred over through-hole technology.

Part Context

This part belongs to the QHTF series of crystal oscillators from Mercury Electronics. The series typically includes various frequencies and voltage options. The 'OE' suffix often denotes specific packaging or environmental compliance, though verification is needed. This model represents a standard fixed-frequency solution within the manufacturer's portfolio of timing components.

Replacement Considerations

Direct substitutes must match the 49.09091 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as current consumption and startup time. Cross-reference with other manufacturers offering similar SMD oscillators if availability is an issue.