18QHTF21-87.000-PD

Overview

The 18QHTF21-87.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 87.0 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down (PD) control function for standby mode management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm. This component is designed for applications requiring precise timing signals within space-constrained electronic systems.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down control functionality to manage standby states
• Utilizes a compact 4-SMD surface-mount package without leads

Applications

• General purpose clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Clock source for microcontrollers and processors requiring 1.8V operation

Procurement Notes

Verify the specific suffix 'PD' indicates the power-down feature when sourcing replacements. Confirm that the operating voltage matches the system requirement of 1.8V. Ensure the footprint corresponds to the 2.0x1.6 mm SMD package dimensions. Check availability through authorized distributors as stock levels may vary. Validate the frequency tolerance specifications against application requirements before finalizing procurement decisions.

Selection Notes

Select this component when a low-voltage 1.8V clock source is required for space-limited designs. The LVCMOS output ensures compatibility with standard digital logic families. Consider the power-down capability if energy efficiency during idle periods is a priority. Verify that the 87.0 MHz frequency aligns with the target circuit's timing needs. Ensure the PCB layout supports the small 4-SMD form factor.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and supply voltages. The '-PD' suffix specifically denotes the inclusion of a power-down pin or control mechanism. These oscillators are designed for high reliability in consumer and industrial electronics. The manufacturer emphasizes precision frequency stability across the product line.

Replacement Considerations

Direct substitutes include other 87.0 MHz LVCMOS oscillators in 2.0x1.6mm packages with 1.8V operation. Verify that replacement parts support the same power-down control interface. Ensure equivalent frequency stability and phase noise characteristics. Cross-reference pinouts to confirm compatibility with existing PCB layouts.