18QHTF21-11.520-PD

Overview

The 18QHTF21-11.520-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 11.52 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage range of 1.8V with an integrated standby or power-down function to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.

Feature Summary

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

Applications

• Portable electronic devices requiring low power consumption
• Communication modules utilizing standard clock signals
• Embedded systems with limited board space

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge protection during assembly.

Selection Notes

Select this component when a precise 11.52 MHz clock signal is required with minimal power usage. The LVCMOS output ensures direct interfacing with most digital logic families without additional level shifting. Consider the physical size of the 2.0x1.6mm package if board real estate is limited. Evaluate the need for the power-down feature if the application involves frequent sleep states.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor timing solutions. The manufacturer specializes in quartz-based frequency control products, leveraging decades of experience in Taiwan's electronics industry. This series typically targets consumer electronics and industrial applications where reliability and size are critical factors.

Replacement Considerations

Direct substitutes must match the 11.52 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar SMD oscillators, ensuring identical electrical parameters and mechanical dimensions to maintain PCB integrity.