18QHTF21-49.370-PD

Overview

The 18QHTF21-49.370-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 49.37 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby power-down mode. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount assembly. This component provides precise timing signals for digital circuits requiring stable clock sources.

Feature Summary

• Generates a stable 49.37 MHz clock signal using LVCMOS output logic
• Supports low-power operation with a 1.8V supply and dedicated standby mode
• Utilizes a compact 4-SMD no-lead package for efficient surface-mount integration

Applications

• Digital system clock generation
• Microcontroller timing references
• Communication interface synchronization

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly issues. Cross-reference the datasheet for any specific handling or storage conditions required for this oscillator type.

Selection Notes

Select this component when a precise 49.37 MHz frequency is required with minimal power consumption. The LVCMOS output is compatible with standard digital logic families. Consider the 1.8V supply constraint and ensure your design supports the standby functionality if power management is critical. The small form factor makes it suitable for space-constrained portable or dense electronic devices.

Part Context

This part belongs to Mercury Electronics' line of quartz crystal oscillators, which also includes TCXOs and VCTCXOs. The '18' prefix typically indicates the 1.8V supply voltage, while 'QHTF' denotes the specific series characteristics. It is distinct from through-hole crystals like the HUS series, offering integrated oscillator functionality in a surface-mount format.

Replacement Considerations

Direct substitutes must match the 49.37 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and electrical specifications such as current consumption and startup time. Alternative parts from other manufacturers may require schematic adjustments due to differing pin configurations or voltage tolerances.