18QHTF21-1.0448-PD

Overview

The 18QHTF21-1.0448-PD is a 1.0448 MHz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and features an LVCMOS output signal. The device supports a power-down function via the PD pin and utilizes a 4-SMD, No Lead package with dimensions of 2.0x1.6mm. It is designed for surface mount applications and offers frequency stability of ±50ppm within an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports low voltage operation at 1.8V
• Integrates standby control via power-down pin
• Provides standard LVCMOS output signals

Applications

• Embedded systems requiring precise timing
• Consumer electronics with space constraints
• Industrial control modules

Procurement Notes

Verify the specific suffix 'PD' indicates the power-down functionality and 'OE' variants differ in enable logic. Confirm the 1.8V supply requirement matches the target circuit design. Ensure the 4-SMD footprint aligns with the PCB layout specifications. Check for RoHS compliance status if required by project standards.

Selection Notes

Select this component when a compact 2.0x1.6mm form factor is necessary. Choose based on the need for 1.0448 MHz frequency accuracy. Consider the 1.8V supply constraint for low-power designs. Evaluate the ±50ppm stability against system clock tolerance requirements.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series includes various frequencies and package options. The manufacturer specializes in quartz crystals and timing solutions. This specific model represents a standard XO variant with power management capabilities.

Replacement Considerations

Direct substitutes include other 1.0448 MHz LVCMOS oscillators in 4-SMD packages. Verify voltage compatibility and pinout alignment before substitution. Check frequency stability and temperature range specifications. Ensure the replacement supports the required power-down functionality.