18QHTF21-12.67917-PD

Overview

The 18QHTF21-12.67917-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.67917 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications, featuring a supply voltage of 1.8V. It includes a standby or power-down function to manage energy consumption when not in active use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Integrates standby and power-down functionality for energy efficiency
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing systems requiring precise clock timing
• Embedded controllers and microprocessor clock sources
• Communication equipment utilizing standard frequency references

Procurement Notes

Verify the specific ordering suffix PD against the manufacturer's current datasheet to ensure correct pinout and electrical specifications. Confirm that the 1.8V supply requirement aligns with the target system's power rails. Check for any recent revisions in the package outline drawing to ensure mechanical fit within the designated footprint on the printed circuit board.

Selection Notes

Select this component when a stable 12.67917 MHz reference is required with minimal power consumption. The LVCMOS output is appropriate for standard CMOS logic families. Ensure the operating temperature range specified in the official documentation meets the environmental conditions of the final application. The small form factor makes it suitable for high-density PCB layouts where space is limited.

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 2.5V variants. The 18QHTF21 series is characterized by its small footprint and reliability, serving as a common clock source in consumer electronics and industrial control devices where size and power efficiency are critical design constraints.

Replacement Considerations

Direct substitutes must match the 12.67917 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package dimensions. Verify pin-to-pin compatibility before replacement. Cross-reference with other manufacturers offering similar SMD XO components in the same package style.