18QHTF21-1.0025-PD

Overview

The 18QHTF21-1.0025-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.0025 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby power-down function to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Integrates a standard crystal oscillator with LVCMOS output interface
• Supports standby mode with power-down functionality for energy efficiency
• Operates on a single 1.8V supply voltage
• Utilizes a compact 4-SMD no-lead surface-mount package

Applications

• Low-power consumer electronics requiring precise timing
• Portable devices utilizing 1.8V logic systems
• Embedded systems needing compact clock sources
• Battery-operated equipment prioritizing power management

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the 2.0x1.6mm footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly and long-term performance.

Selection Notes

Select this component when a 1.0025 MHz clock signal is required with minimal power consumption. The LVCMOS output is compatible with standard digital logic families. Consider the 1.8V supply constraint as a primary selection factor. The small form factor makes it ideal for dense PCB layouts where larger packages are not feasible. Evaluate the standby feature if power saving during inactive states is critical for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-profile crystal oscillators. The series typically offers various frequencies and output types within a standardized 2.0x1.6mm package. Mercury Electronics specializes in quartz-based timing components, providing solutions for both standard and temperature-compensated applications across industrial and consumer markets.

Replacement Considerations

Direct replacements must match the 1.0025 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Alternative parts from other manufacturers may require schematic adjustments due to differing drive strength or loading specifications.