18QHTF21-7.1640625-PD

Overview

The 18QHTF21-7.1640625-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.1640625 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability to reduce energy consumption when not in active use. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6mm, suitable for surface-mount applications.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Utilizes LVCMOS output interface

Applications

• Portable electronic devices requiring low power consumption
• Communication equipment utilizing standard clock signals
• Embedded systems with space-constrained PCB layouts

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 circuit's power rails. Ensure the 4-SMD no-lead package footprint matches your board layout specifications. Request the official datasheet from Mercury Electronics for detailed electrical characteristics and reliability data.

Selection Notes

Select this component when a precise 7.1640625 MHz clock source is required for 1.8V logic systems. Consider the LVCMOS output compatibility with your receiving digital inputs. Evaluate the need for power-down modes if battery life or thermal management is critical. Compare the 2.0x1.6mm package size against available board real estate constraints.

Part Context

This model belongs to the QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options within a standardized small outline package. The 'PD' suffix indicates the inclusion of power-down control functionality, distinguishing it from continuous-operation variants.

Replacement Considerations

Direct replacements must match the 7.1640625 MHz frequency, 1.8V operating voltage, and LVCMOS output type. Verify pin compatibility and physical dimensions of any substitute components to ensure they fit the existing 4-SMD no-lead footprint without mechanical interference.