18QHTF21-70.500-OE

Overview

The 18QHTF21-70.500-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 70.5 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features enable/disable functionality. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications. The unit supports an operating temperature range from -40°C to 85°C and maintains a frequency stability of ±50ppm. Maximum supply current is specified at 22mA.

Feature Summary

• Provides stable clock signals via LVCMOS output interface
• Supports active enable and disable control states
• Designed for high-reliability surface mount integration

Applications

• General purpose digital circuit timing
• Embedded system clock generation
• Communication equipment signal processing

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to ensure correct voltage and frequency specifications. Confirm that the required operating temperature range aligns with your environmental constraints. Cross-reference the package dimensions with your PCB footprint design to guarantee proper mechanical fit during assembly.

Selection Notes

Choose this component when a low-voltage 1.8V operation is required alongside standard LVCMOS compatibility. Consider the ±50ppm stability rating relative to your system's jitter tolerance requirements. Ensure the 4-SMD no-lead package profile fits within your available board space and manufacturing capabilities.

Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators produced by Mercury Electronics. The series typically offers various frequency options within a standardized small form factor. These components are designed to replace through-hole crystals or larger oscillator packages in modern compact electronic designs requiring precise timing references.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinout and electrical characteristics but different frequencies. Verify that any replacement maintains the same 1.8V supply requirement and LVCMOS output type to ensure circuit compatibility without modification.