18QHTF21-121.400-PD

Overview

The 18QHTF21-121.400-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 121.4 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby (power down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-power operation through a dedicated standby mode
• Delivers standard LVCMOS signal output
• Designed for space-constrained applications with a small footprint

Applications

• Low-power electronic designs requiring precise timing
• Portable devices utilizing 1.8V logic levels
• Systems needing clock signals at 121.4 MHz

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package size fits within the allocated PCB area. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a 121.4 MHz clock source is required with minimal power consumption. The integrated standby feature makes it suitable for battery-operated equipment. Consider the 1.8V operating voltage compatibility with your microcontroller or FPGA. The small 2.0x1.6 mm package is ideal for dense board layouts where space is limited compared to larger oscillator packages.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized small outline package. The series typically features LVCMOS outputs and low-voltage operation. Other variants in this family include different frequencies such as 21.4 MHz and 40.665 MHz, sharing similar physical dimensions and electrical characteristics.

Replacement Considerations

Direct substitutes may include other 121.4 MHz LVCMOS oscillators in a 2.0x1.6 mm SMD package. Verify pinout compatibility and voltage levels. Cross-reference with manufacturers offering similar low-profile timing solutions. Ensure the replacement meets the same temperature range and stability specifications.