18QHTF21-11.955-PD

Overview

The 18QHTF21-11.955-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 11.955 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a power-down function to manage energy consumption during standby periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Includes a dedicated power-down feature for standby mode operation
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• Low-voltage digital circuit timing references
• Portable electronic devices requiring power efficiency
• Communication equipment signal generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a precise 11.955 MHz clock signal is required for LVCMOS-compatible circuits. The choice is driven by the need for a low-profile surface-mount solution and integrated power management capabilities. Consider the operating temperature range and stability specifications relative to the environmental conditions of the end application to ensure long-term reliability.

Part Context

This oscillator belongs to the Mercury 18QHTF21 series, which focuses on low-voltage, small-footprint timing solutions. The series typically offers various frequency options within a standardized package size. This specific part number denotes the 11.955 MHz variant, maintaining consistency in physical dimensions and electrical interface characteristics across the family.

Replacement Considerations

Direct replacements must match the 11.955 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-voltage XO specifications if Mercury stock is unavailable.