18QHTF21-124.990-PD

Oscillators Overview

The 18QHTF21-124.990-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 124.99 MHz with a stability of ±50 ppm. The device utilizes LVCMOS output logic and requires a 1.8V supply voltage. Maximum supply current is 28 mA. It supports a standby function for power down control. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. Operating temperature range is -40°C to 85°C.

Oscillators Feature Summary

• Supports standby mode for power down control
• LVCMOS output logic interface
• Compact 4-SMD no lead package design

Oscillators Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure the 1.8V supply voltage aligns with the system power rails. Confirm that the LVCMOS output swing is compatible with the receiving input logic levels. Check the operating temperature range suitability for the intended environment. Validate the physical footprint compatibility during PCB layout finalization.

Oscillators Selection Notes

Select this component when a precise 124.99 MHz reference is required with low power consumption. The LVCMOS output is suitable for standard digital interfaces. Consider the small form factor for space-constrained designs. Verify that the ±50 ppm stability meets the system jitter and phase noise requirements. Ensure the 1.8V supply capability matches the available power domain.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent electrical characteristics. The 'PD' suffix indicates the inclusion of a power-down pin or function. These devices are designed for high-volume consumer and industrial electronics requiring reliable timing sources.

Oscillators Replacement Considerations

Direct replacements must match the 124.99 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent stability and temperature range specifications. Cross-reference pinouts if alternative manufacturers offer similar packages.