18QHTF21-23.977-PD

Oscillators Overview

The 18QHTF21-23.977-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 23.977 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for standard clock applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface for digital circuit compatibility
• Integrated standby mode for power reduction
• Compact surface-mount package design

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Oscillators Selection Notes

Select this oscillator when a low-voltage 1.8V operation is required alongside a standard LVCMOS output. The small 2.0x1.6mm footprint makes it suitable for space-constrained designs. Consider the standby feature if power efficiency during idle states is a priority. Ensure the 23.977 MHz frequency meets the specific timing needs of the target digital subsystem.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 4-SMD package. The series typically provides options for different supply voltages and output types. The 'PD' suffix likely indicates the presence of a power-down control pin or feature, distinguishing it from basic continuous-operation variants within the same physical form factor.

Oscillators Replacement Considerations

Direct replacements must match the 23.977 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Alternative parts from other manufacturers may require adapter footprints or voltage translation if not identical.