18QHTF21-12.1496-PD

Overview

The 18QHTF21-12.1496-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.1496 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a power-down capability with standby functionality to conserve energy when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This surface-mount oscillator is suitable for space-constrained electronic designs requiring precise clock signals.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down mode for energy efficiency
• Compact 4-SMD no-lead surface mount package

Applications

• Battery-powered portable devices
• Low-voltage digital systems
• Space-constrained circuit boards

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your power management architecture. Ensure the 4-SMD footprint matches your PCB layout constraints. Check availability status as inventory levels may fluctuate. Validate that the LVCMOS output swing meets the input thresholds of your receiving components.

Selection Notes

Select this model when a 12.1496 MHz clock signal is required with minimal power consumption. The 1.8V operating voltage makes it suitable for modern low-power integrated circuits. Consider the small 2.0x1.6 mm package size if board real estate is limited. Ensure the application does not require spread spectrum or temperature compensation beyond standard XO performance. Verify that the standby feature integrates correctly with your system's power sequencing.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within the same physical footprint. Other variants include different frequencies such as 51.2 MHz or 8.0 MHz. The 'PD' suffix indicates the inclusion of a power-down control pin. The series is designed for general-purpose clocking in consumer and industrial electronics.

Replacement Considerations

Direct replacements must match the 12.1496 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility for the power-down function. Cross-reference with other manufacturers offering similar low-profile oscillators.