18QHTF21-1.24453-PD

Overview

The 18QHTF21-1.24453-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 1.24453 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. It features a standby or power-down mode capability to reduce energy consumption when not in active use. The component is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output interface for digital logic compatibility
• Includes standby or power-down functionality for power management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Battery-powered portable electronic devices
• Low-power embedded systems requiring precise timing
• Consumer electronics with space-constrained PCB layouts

Procurement Notes

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

Selection Notes

Select this component when a low-frequency, low-voltage oscillator is required for timing applications. The 1.8V operation makes it suitable for modern low-power digital circuits. Consider the small 2.0x1.6 mm footprint if board space is limited. Verify that the LVCMOS output swing is compatible with the input thresholds of the connected microcontroller or FPGA. Evaluate the need for standby modes to optimize overall system battery life.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic Ind. Co., Ltd. The series typically offers various frequencies within the same physical package and electrical specification framework. The suffix '-PD' indicates the inclusion of power-down or standby functionality. Mercury Electronics specializes in frequency control products, including quartz crystals and oscillators, providing standardized solutions for timing needs across multiple industries.

Replacement Considerations

Direct replacements must match the 1.8V supply, LVCMOS output, 4-SMD no-lead 2.0x1.6mm package, and standby feature. Verify frequency accuracy and stability specifications. Consult manufacturer cross-reference lists for equivalent parts from other suppliers offering identical pinouts and electrical characteristics.