18QHTF21-34.745-PD

Oscillators Overview

The 18QHTF21-34.745-PD is a 34.745 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and utilizes LVCMOS output logic. The device features a Standby (Power Down) function for power management. It is housed in a 4-SMD, No Lead package with dimensions of 0.079 inches L x 0.063 inches W (2.00mm x 1.60mm) and a maximum seated height of 0.031 inches (0.80mm).

Oscillators Feature Summary

• Supports Standby (Power Down) mode for energy efficiency.
• Utilizes LVCMOS output logic for digital interface compatibility.
• Compact surface-mount design suitable for space-constrained applications.

Oscillators Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application's specifications before ordering. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 2.00mm x 1.60mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a precise 34.745 MHz reference frequency. The LVCMOS output ensures compatibility with standard digital logic families. Consider the compact 4-SMD form factor if board real estate is limited. The standby feature adds value for battery-powered or power-sensitive designs requiring periodic sleep states.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various standard frequencies with consistent physical dimensions and electrical characteristics. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-output variants within the same package family.

Oscillators Replacement Considerations

Direct substitutes must match the 34.745 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent standby functionality. Cross-reference with other manufacturers offering identical pinout and thermal characteristics to ensure drop-in compatibility without schematic modifications.