18QHTF21-69.250-PD

Overview

The 18QHTF21-69.250-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 69.25 MHz with a supply voltage of 1.8V. The device utilizes LVCMOS output logic and features a standby (power down) function. It is housed in a 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low voltage operation at 1.8V
• Includes standby power down capability
• Provides standard LVCMOS output signals

Applications

• General clock signal generation
• Embedded system timing references
• Digital circuit synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 2.0x1.6 mm footprint matches the PCB layout constraints. Check for any specific manufacturing date codes or lot traceability needs required by the project specifications.

Selection Notes

Select this component when a compact 1.8V oscillator is required for space-constrained designs. The 4-SMD no lead package suits automated surface mount assembly processes. Consider the standby feature if power management during idle states is a priority. Verify compatibility with the driving circuit's input impedance and signal integrity requirements for reliable operation.

Part Context

This part belongs to the QHTF series of surface mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within small form factors. The 18QHTF21 variant specifically denotes the 1.8V supply and 2.0x1.6 mm package size, distinguishing it from other voltage or size variants in the product line.

Replacement Considerations

Direct substitutes must match the 69.25 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6 mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter. Cross-reference with other manufacturers offering similar SMD oscillators ensuring identical mechanical and electrical specifications.