18QHTF21-71.040-PD

Overview

The 18QHTF21-71.040-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 71.04 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Features a dedicated standby mode to reduce power consumption during idle periods
• Utilizes a surface-mount 4-SMD no-lead package for automated assembly

Applications

• General clock signal generation in electronic circuits
• Systems requiring low-power standby capabilities
• Compact embedded devices utilizing SMD packaging

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD no-lead package specifications to guarantee proper mechanical fit and electrical connection.

Selection Notes

Select this component when a precise 71.04 MHz reference is required alongside low-power operation. The LVCMOS output is suitable for standard CMOS logic families. Consider the physical size constraints of the application, as the small 2.0x1.6mm package limits placement options compared to larger through-hole or standard SMD oscillators.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series offers various frequencies and voltage options, all sharing a common compact form factor. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from continuous-operation variants within the same product line.

Replacement Considerations

Direct substitutes must match the 71.04 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile oscillators with identical electrical parameters.