18QHTF21-66.155-PD

Overview

The 18QHTF21-66.155-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 66.155 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down function for standby mode control. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within space-constrained electronic systems.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby capability via power-down pin control
• Utilizes quartz-based resonance for stable frequency generation

Applications

• Digital signal processing circuits
• Communication equipment timing references
• Embedded system clock sources

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging and lead time requirements. Confirm that the 1.8V supply voltage aligns with the target system design. Check for RoHS compliance status if environmental regulations apply. Ensure the 4-SMD package footprint matches the PCB layout specifications before finalizing procurement orders.

Selection Notes

Select this component when a 66.155 MHz reference is required with low voltage operation. The small 2.0x1.6mm form factor suits dense board layouts. Consider the LVCMOS output swing against load requirements. Verify temperature range specifications against operational environments. Evaluate power consumption during active and standby modes for battery-sensitive designs.

Part Context

This part belongs to the Mercury Electronics SMD oscillator series, focusing on miniaturized timing solutions. The manufacturer specializes in quartz-based frequency control products including crystals and oscillators. The 18QHTF21 series typically offers standard performance levels suitable for general-purpose digital applications.

Replacement Considerations

Direct substitutes must match the 66.155 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Cross-reference with other manufacturers offering identical electrical parameters and mechanical dimensions to ensure pinout compatibility.