18QHTF21-11.2941-PD

Overview

The 18QHTF21-11.2941-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 11.2941 MHz with LVCMOS output logic levels. 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 2.0x1.6mm. This component is designed for applications requiring precise timing signals in low-power electronic systems.

Feature Summary

• LVCMOS output interface for digital compatibility
• Integrated standby and power-down functionality
• Compact 4-SMD no lead surface mount package

Applications

• Low-power embedded systems
• Digital signal processing circuits
• Communication modules requiring precise clocking

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that 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 to ensure reliability under your environmental conditions.

Selection Notes

Select this oscillator when a stable 11.2941 MHz reference is needed with minimal power consumption. The LVCMOS output simplifies interfacing with standard digital logic without additional level shifting. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is critical. Consider the small form factor for space-constrained designs.

Part Context

This part belongs to the QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, including 3.3V variants like the 3QHTF21 model. The '18' prefix indicates the 1.8V supply version, while 'PD' denotes the power-down capability. These components are widely used in consumer electronics and industrial control systems.

Replacement Considerations

Direct substitutes may include other 1.8V LVCMOS oscillators with identical 2.0x1.6mm footprints and 11.2941 MHz frequency. Verify pinout compatibility and electrical specifications such as jitter and phase noise if high precision is required. Cross-reference with similar models from Mercury Electronics or other manufacturers offering compatible SMD packages.