18QHTF21-12.287-PD

Overview

The 18QHTF21-12.287-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.287 MHz and utilizes LVCMOS output logic levels. The device requires a 1.8V supply voltage and supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 7.0mm length by 5.0mm width. The component is designed for timing applications requiring precise clock signals within specified operating temperature ranges.

Feature Summary

• Supports low voltage operation at 1.8V for efficient power consumption
• Includes standby functionality to reduce current draw during idle periods
• Provides stable LVCMOS output signals for digital circuit synchronization

Applications

• Battery-powered portable electronic devices
• General purpose digital system clock generation
• Embedded systems requiring low power timing sources

Procurement Notes

Verify the specific supply voltage requirements against your system design to ensure compatibility with the 1.8V specification. Confirm that the LVCMOS output logic levels align with the input thresholds of the receiving components. Check the operating temperature range limits to ensure suitability for the intended environmental conditions. Ensure the 4-SMD package footprint matches the PCB layout constraints.

Selection Notes

Select this component when a 12.287 MHz clock signal is required with low power consumption characteristics. Consider the 1.8V supply constraint and LVCMOS interface compatibility with target microcontrollers or FPGAs. Evaluate the need for standby functionality to extend battery life in portable applications. Verify that the physical dimensions fit within the available board space.

Part Context

This part belongs to the 18QHTF21 series of surface mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, including 3.3V variants. The -PD suffix typically indicates specific packaging or tape-and-reel configuration details as per manufacturer standards. These oscillators are part of Mercury's broader portfolio of frequency control products established since 1973.

Replacement Considerations

Direct substitutes may include other 12.287 MHz LVCMOS oscillators in 4-SMD packages with compatible 1.8V operation. Verify pinout compatibility and electrical specifications before substitution. Consult manufacturer cross-reference lists for equivalent parts with identical form, fit, and function characteristics.