18QHTF21-49.0909-PD

Overview

The 18QHTF21-49.0909-PD is a standard frequency crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.0909 MHz with an LVCMOS output interface. The device requires a 1.8V supply voltage and supports a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component provides precise timing signals suitable for digital circuits requiring stable clock sources.

Feature Summary

• Provides stable LVCMOS output signals for digital system synchronization
• Supports low-power operation through integrated standby power-down functionality
• Utilizes a compact surface-mount package design for efficient PCB space utilization

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing standard frequency timing references
• Embedded systems needing compact oscillator solutions with low power consumption

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design specifications before procurement. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a 49.0909 MHz frequency is specifically required for system timing. Consider the LVCMOS output compatibility with your downstream logic levels. Evaluate the 1.8V supply requirement against available power resources. The small 2.0x1.6mm package makes it suitable for space-constrained designs compared to larger through-hole alternatives.

Part Context

This part belongs to the HFTF series of surface-mount crystal oscillators from Mercury Electronics. These devices are designed for applications demanding reliable frequency control in compact form factors. The series typically offers various frequency options and supply voltages to meet diverse electronic design needs across consumer and industrial sectors.

Replacement Considerations

Direct substitutes may include other 49.0909 MHz LVCMOS oscillators in 4-SMD packages with compatible 1.8V operation. Verify pinout compatibility and electrical parameters such as drive level and load capacitance before substitution.