18QHTF21-48.900-PD

Overview

The 18QHTF21-48.900-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 48.9 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down mode to reduce energy consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precision clock source for data synchronization applications requiring low power and small form factor.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby power-down functionality for energy efficiency
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Data synchronization clock sources
• Digital signal processing systems
• Communication equipment timing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure correct pinout and electrical characteristics. Confirm that the 1.8V supply requirement aligns with your system design. Check for any recent updates to the RoHS compliance status or lead-free specifications before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The 48.9 MHz frequency must match the target system clock requirements. Consider the 2.0x1.6mm footprint constraints and the availability of power-down control signals in the host circuit design to utilize the standby feature effectively.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series typically offers various frequencies and supply voltages, with the '18' prefix indicating the 1.8V operating voltage range. The 'PD' suffix denotes the inclusion of a power-down control function, distinguishing it from continuous-operation variants within the same family.

Replacement Considerations

Direct substitutes may include other 48.9 MHz LVCMOS oscillators in a 2.0x1.6mm SMD package with 1.8V operation. Verify pin-to-pin compatibility and electrical parameter equivalence, such as load capacitance and drive strength, before replacing. Cross-reference with Mercury Electronics' official replacement guides for validated alternatives.