18QHTF21-123.457-PD

Overview

The 18QHTF21-123.457-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 123.457 MHz with LVCMOS output logic and a supply voltage of 1.8V. The component features a 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. It includes a standby (power down) function for energy management.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby mode to reduce power consumption during idle periods
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing high-frequency oscillators
• Embedded systems with strict size constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-profile 2.0x1.6mm oscillator is required for 1.8V logic applications. Consider the standby feature if power efficiency is critical. Verify compatibility with LVCMOS interfaces in the host system. Check operating temperature ranges to ensure reliability under expected environmental conditions without relying on generic family assumptions.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products. The series typically offers various frequencies within a standardized small outline package format. The 'PD' suffix indicates the inclusion of a power-down capability, distinguishing it from standard continuous-operation variants within the same physical form factor.

Replacement Considerations

Direct substitutes must match the 123.457 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter against the original specification sheet.