18QHTF21-51.6826-PD

Overview

The 18QHTF21-51.6826-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 51.6826 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down function to reduce consumption when inactive. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range typical for commercial applications, ensuring reliable timing performance in space-constrained electronic designs.

Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient system integration
• Includes standby mode capability to minimize power consumption during idle periods
• Utilizes LVCMOS output interface for direct compatibility with digital logic circuits

Applications

• Consumer electronics requiring precise clock signals
• Communication modules needing stable frequency references
• Embedded systems with limited board space constraints

Procurement Notes

Verify the specific suffix 'PD' indicates the power-down feature as documented. Confirm the 1.8V supply requirement matches your system design. Ensure the 4-SMD no-lead package footprint aligns with your PCB layout. Check the datasheet for exact operating temperature limits before finalizing procurement decisions.

Selection Notes

Select this component when a 51.6826 MHz reference is required with low power consumption. The 1.8V LVCMOS output suits modern digital interfaces. Consider the small 2.0x1.6mm package for dense layouts. Verify that the standby functionality meets your power management strategy compared to continuous operation alternatives.

Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltages. The 18QHTF21 variant specifically denotes the 1.8V supply and 2.0x1.6mm package size. This family is designed for general-purpose timing applications in portable and industrial devices.

Replacement Considerations

Direct substitutes must match the 51.6826 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering identical form-factor and electrical specifications for equivalent performance.