18QHTF21-1.545-PD

Overview

The 18QHTF21-1.545-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.545 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode for power management
• Compact surface-mount form factor

Applications

• Battery-powered electronic devices
• Portable consumer electronics
• General clock signal generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 1.545 MHz clock source is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. The integrated standby feature makes it suitable for systems requiring active power management. Consider the small physical size for space-constrained designs.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co. Ltd, which specializes in frequency control products. The series typically offers various frequencies within a standardized 2.0x1.6mm SMD package. The manufacturer has established expertise in crystal industry solutions since 1973, providing reliable timing components for global markets.

Replacement Considerations

Direct substitutes may include other 1.545 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package from different manufacturers. Verify pinout compatibility and electrical specifications such as current consumption and startup time before substitution.