18QHTF21-19.9998-PD

Oscillators Overview

The 18QHTF21-19.9998-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 19.9998 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a dedicated standby or power-down mode to reduce energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6mm, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power management
• Compact 4-SMD no-lead surface mount package

Oscillators Applications

• Portable electronic devices requiring low power consumption
• Digital signal processing circuits
• Communication equipment clock sources

Oscillators Procurement Notes

Verify the specific ordering suffix 'PD' corresponds to the required power-down functionality and packaging configuration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead footprint matches the design layout specifications. Check RoHS compliance status if environmental regulations apply to the end product.

Oscillators Selection Notes

Select this component when a precise 19.9998 MHz reference is needed with minimal power usage. The LVCMOS output is appropriate for standard digital interfaces. Consider the small 2.0x1.6mm package size for space-constrained designs. Evaluate the need for a standby feature against the operational duty cycle requirements of the application.

Oscillators Part Context

This part belongs to the 18QHTF21 series of high-frequency oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized small outline package. The manufacturer specializes in quartz crystal products, leveraging decades of experience in frequency control solutions for consumer and industrial electronics markets.

Oscillators Replacement Considerations

Direct substitutes must match the 19.9998 MHz frequency, 1.8V operation, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics before substitution. Generic replacements may differ in phase noise or startup time.